Academic literature on the topic 'Anaerobic co-digestion'
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Journal articles on the topic "Anaerobic co-digestion"
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Primasari, Budhi, and Ansiha Nur. "Pengaruh Laju Pembebanan Organik terhadap Reduksi Padatan pada Proses Anaerobic Co-Digestion Sampah Sayuran dengan Lumpur SBR." Dampak 15, no. 2 (July 31, 2018): 88. http://dx.doi.org/10.25077/dampak.15.2.88-92.2018.
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Anaerobic digestion is to treat organic waste such as vegetable solid waste (VSW). Anaerobic co-digestion is the mixture of two or more different waste types with the aim to enhance the efficiency of the anaerobic digestion process. In this study, anaerobic digestion of vegetable solid waste (VSW) is compared to the anaerobic co-digestion of VSW and sequencing batch reactor (SBR) sludge. This investigation is focussed on the varying the organic loading rate (OLR) which is the mixing ratio of VSW to SBR sludge; and pH (6, 7 and 8) of the mixture. The mixtures were kept in serum bottles and placed in a shaker for 7 days at 150 rpm. Experiments with OLR 2:1, VSW composition of 1:2:1:1 and pH 6 produced the highest total biogas in anaerobic co-digestion. Thus, for anaerobic co-digestion, the optimum composition of VSW, OLR and pH are 1:2:1:1, 2:1 and 6 respectively. The range of % reduction in total solids (TS), total suspended solids (TSS) and total dissolve solids (TDS) in anaerobic co-digestion is 4-46, 0-43 and 0-64 respectively. In a comparison with single digestion, only 1 in 5 samples of co-digestion exceed that amount of biogas produced by single digestion and this shows that single anaerobic digestion resulted in higher biogas yield. The range of % reduction in TS, TSS and TDS in anaerobic digestion is 13-54, 15-66 and 9-58 respectively. Comparatively, single digestion performs better in solids removal than anaerobic co-digestion and thus, co-digestion method may not be suitable for all types of organic waste.
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Chow, Wei Ling, Siewhui Chong, Jun Wei Lim, Yi Jing Chan, Mei Fong Chong, Timm Joyce Tiong, Jit Kai Chin, and Guan-Ting Pan. "Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield." Processes 8, no. 1 (January 1, 2020): 39. http://dx.doi.org/10.3390/pr8010039.
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Anaerobic digestion has been widely employed in waste treatment for its ability to capture methane gas released as a product during the digestion. Certain wastes, however, cannot be easily digested due to their low nutrient level insufficient for anaerobic digestion, thus co-digestion is a viable option. Numerous studies have shown that using co-substrates in anaerobic digestion systems improve methane yields as positive synergisms are established in the digestion medium, and the supply of missing nutrients are introduced by the co-substrates. Nevertheless, large-scale implementation of co-digestion technology is limited by inherent process limitations and operational concerns. This review summarizes the results from numerous laboratory, pilot, and full-scale anaerobic co-digestion (ACD) studies of wastewater sludge with the co-substrates of organic fraction of municipal solid waste, food waste, crude glycerol, agricultural waste, and fat, oil and grease. The critical factors that influence the ACD operation are also discussed. The ultimate aim of this review is to identify the best potential co-substrate for wastewater sludge anaerobic co-digestion and provide a recommendation for future reference. By adding co-substrates, a gain ranging from 13 to 176% in the methane yield was accomplished compared to the mono-digestions.
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Aboudi, Kaoutar, Xiomara Gómez-Quiroga, Carlos José Álvarez-Gallego, and Luis Isidoro Romero-García. "Insights into Anaerobic Co-Digestion of Lignocellulosic Biomass (Sugar Beet By-Products) and Animal Manure in Long-Term Semi-Continuous Assays." Applied Sciences 10, no. 15 (July 26, 2020): 5126. http://dx.doi.org/10.3390/app10155126.
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Biogas production through anaerobic digestion has proven to be one of the most important pillars of the transition into the circular economy concept, a sustainable approach for biorefinery. This work aims to extend and improve knowledge in the anaerobic co-digestion of complementary substrates, given insights into wastes biodegradability and the influence of manure composition on the anaerobic process stability. Anaerobic co-digestion of sugar beet by-products with two kinds of animal manure (pig and cow) was investigated in semi-continuous assays, analyzing both common and non-classical parameters. Co-digestion with manure clearly mitigated the inhibitory effect of volatile fatty acids at high organic loading rates, leading to increases in methane production by 70% and 31% in comparison with individual digestion of sugar beet by-products, for co-digestion with pig and cow manure, respectively. Non-classical parameters could give more insight into the coupling/uncoupling of the anaerobic digestion phases and the involved microorganisms. Indirect parameters indicated that the process failure at the critical organic loading rates was mainly due to methanogenesis inhibition in the co-digestion with pig manure, while in co-digestion with cow manure or in individual digestion of sugar beet by-products, both hydrolysis–acidogenesis and methanogenesis phases were affected. Biomethanation degree refers to the maximum methane potential of organic wastes. Sugar beet by-products required a long digestion-time to reach high biodegradability. However, short digestion-times for co-digestion assays led to a high biomethanation degree.
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Cavalcanti, Ingrid Lélis Ricarte, Valderi Duarte Leite, and Roberto Alves de Oliveira. "Bibliometric analysis on the applicability of anaerobic digestion in organic solid waste." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 18 (May 31, 2023): 1–13. http://dx.doi.org/10.4136/ambi-agua.2891.
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Anaerobic biological treatment can comprise a viable route of CH4 production through the energy recovery of organic solid waste (OSW). This work therefore presented a bibliometric analysis of research trends on the theme "Applicability of biological treatment via Anaerobic Digestion in Organic Solid Waste", considering experimental articles published from 2018 to 2022 in the Web of Science database™; the analysis used VoSviewer software to define research trends, and found that the main terms addressed in the mapped scientific articles were anaerobic, waste, sludge, waste food, municipal waste, anaerobic co-digestion, sewage sludge, organic fraction, co-digestion and biogas. As a product of such mapping, an Interaction Network Diagram was constructed comprising the main terms in addition to a theoretical foundation on anaerobic digestion and biochemical and microbiological aspects about the process.
Keywords: anaerobic co-digestion, clean energy, food waste, microbial intercropping.
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Rodríguez, L., J. Villaseñor, F. J. Fernández, and I. M. Buendía. "Anaerobic co-digestion of winery wastewater." Water Science and Technology 56, no. 2 (July 1, 2007): 49–54. http://dx.doi.org/10.2166/wst.2007.471.
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The operational performance of anaerobic batch reactors treating winery wastewater (WW) combined with waste activated sludge (WAS) in different proportions was investigated under mesophilic conditions. In these experiments it was shown that for anaerobic digestion of WW alone, methane production rate was lower than the rates achieved when WW and WAS were treated together. When WW was mixed with WAS at a concentration of 50% WW resulted in the highest methane production rates. A simplified anaerobic model was used to determine the main kinetic parameters; maximum COD reduction rate (qDA) and maximum methane generation rate (kmax). The maximum values of qDA and kmax were 16.50 kgCOD COD−1 d−1 and 14.34 kgCOD kgCOD−1 d−1, respectively.
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Esposito, G., L. Frunzo, A. Giordano, F. Liotta, A. Panico, and F. Pirozzi. "Anaerobic co-digestion of organic wastes." Reviews in Environmental Science and Bio/Technology 11, no. 4 (April 5, 2012): 325–41. http://dx.doi.org/10.1007/s11157-012-9277-8.
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Zhao, Ke, Qiang Wei, Mingxuan Bai, and Mengnan Shen. "Study on the Environmental Impact and Benefits of Incorporating Humus Composites in Anaerobic Co-Digestion Treatment." Toxics 12, no. 5 (May 13, 2024): 360. http://dx.doi.org/10.3390/toxics12050360.
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This study evaluated the environmental impact and overall benefits of incorporating humus composites in the anaerobic co-digestion of kitchen waste and residual sludge. The life cycle assessment method was used to quantitatively analyze the environmental impact of the entire anaerobic co-digestion treatment process of waste, including garbage collection, transportation, and final product utilization. Moreover, the comprehensive assessment of the environmental impact, energy-saving and emission-reduction abilities, and economic cost of using humus composites in the anaerobic co-digestion treatment process was conducted using a benefit analysis method. The results showed that the anaerobic co-digestion of kitchen waste and residual sludge significantly contributed to the mitigation of global warming potential (GWP), reaching −19.76 kgCO2-eq, but had the least impact on the mitigation of acidification potential (AP), reaching −0.10 kgSO2-eq. In addition, the addition of humus composites significantly increased the production of biogas. At a concentration of 5 g/L, the biogas yield of the anaerobic co-digestion process was 70.76 m3, which increased by 50.62% compared with the blank group. This amount of biogas replaces ~50.52 kg of standard coal, reducing CO2 emissions by 13.74 kg compared with burning the same amount of standard coal. Therefore, the anaerobic co-digestion treatment of kitchen waste and residual sludge brings considerable environmental benefits.
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Darwin, Novi Diana, Mardhotillah, and Atmadian Pratama. "Anaerobic Co-Digestion of Cow Manure and Palm Oil Mill Effluent (POME): Assessment of Methane Production and Biodegradation Efficiency." International Journal of Design & Nature and Ecodynamics 16, no. 6 (December 21, 2021): 671–76. http://dx.doi.org/10.18280/ijdne.160608.
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The performance of anaerobic co-digestion of cow manure and POME was evaluated. The anaerobic composting process was carried out by using semi-continuous reactors under the mesophilic condition (35 ± 1℃). The addition of POME to the on-going anaerobic composting of cow manure was applied stepwise within a cycle of HRT (20 days). Results showed that the anaerobic co-digestion reactor could produce methane at about six times higher (7.2 L CH4) than the control reactor (1.3 L CH4). An increasing of POME loaded to the on-going anaerobic composting cow manure culture (4% to 64%) did not affect pH of the culture in which pH was still stable between 7.11 and 7.5. Assessment of biodegradation efficiency revealed that nitrogen removal of the anaerobic co-digestion reactor was six times higher (21%) than the nitrogen removal of the control reactor (3.4%). This suggested that the anaerobic co-digestion reactor performed sufficiently well in which no organic acid as well as ammonia accumulated in the reactor that could be effective to decompose the organic matters.
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Navaneethan, N., P. Topczewski, S. Royer, and D. Zitomer. "Blending anaerobic co-digestates: synergism and economics." Water Science and Technology 63, no. 12 (June 1, 2011): 2916–22. http://dx.doi.org/10.2166/wst.2011.557.
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Co-digestion is the process in which wastes from various sources are treated together. Therefore, more organic carbon is added to make efficient use of existing digesters. The objectives of this study were to compare potential co-digestates, determine synergistic and antagonistic co-digestion outcomes and estimate economic benefits for preliminary screening. Over 80 wastes were identified from 54 facilities within 160 km of an existing municipal digester. Synergistic, antagonistic and neutral co-digestion outcomes were observed for the various wastes. A simple economic comparison resulted in the greatest potential benefits for four co-digestates: yeast flavorings production waste, meat production dissolved air flotation float, acid whey from cheese production and thin stillage from corn ethanol production. Performance was investigated using bench-scale digesters receiving primary sludge with and without co-digestates. Methane production rates were 105 and 66% higher when co-digestates were present, but were anticipated to increase only 57 and 23% due to the additional chemical oxygen demand. Therefore, significant synergistic outcomes were observed during co-digestion. Co-digestion of the most promising wastes with primary sludge in full scale was estimated to generate enough electricity to power more than 2,500 houses.
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Olatunji, Kehinde O., and Daniel M. Madyira. "Anaerobic co-digestion of alkali-pretreated groundnut shells and duck waste for methane yield optimization and sustainable environment." E3S Web of Conferences 433 (2023): 02005. http://dx.doi.org/10.1051/e3sconf/202343302005.
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This study investigated the effect of the anaerobic co-digestion of duck waste and alkali-pretreated groundnut shells at mesophilic temperature for methane yield optimization and waste management. Co-digestion of duck waste and alkali-pretreated groundnut shells was carried out using 100, 75: 25, 50: 50, 25: 75, and 100% duck waste: alkali-pretreated groundnut shells in a laboratory-batch digester at mesophilic temperature. The results indicated that anaerobic co-digestion of duck waste and alkali-pretreated groundnut shells is possible since no negative influence was observed during the joint digestion. It was observed that co-digestion released higher methane yield compared to mono-digestion. The optimum cumulative methane yield of 290 mL CH4 g/ VSadded was recorded from a 75: 25% ratio of duck waste: alkali-pretreated groundnut shells. This mixing ratio improved methane yield by 38%. This study confirms that the anaerobic co-digestion of duck waste and alkalipretreated groundnut shells can produce low-carbon fuel and economical waste management to maintain a sustainable environment.
Dissertations / Theses on the topic "Anaerobic co-digestion"
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Nordlander, Eva. "System studies of Anaerobic Co-digestion Processes." Doctoral thesis, Mälardalens högskola, Framtidens energi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36515.
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Production of biogas through anaerobic digestion is one pathway to achieving the European Union (EU) goals of reducing greenhouse gas emissions, increasing the share of renewable energy, and improving energy efficiency. In this thesis, two different models (Anaerobic Digestion Model No. 1 and an artificial neural network) are used to simulate a full-scale co-digester in order to evaluate the feasibility of such models. This thesis also includes models of two systems to study the inclusion of microalgae in biogas plants and wastewater treatment plants. One of the studies is a life-cycle assessment in which replacement of the ley crop with microalgae is evaluated. The other study concerns the inclusion of microalgae in case studies of biological treatment in three wastewater treatment plants. Finally, the co-digestion between microalgae and sewage sludge has been simulated to evaluate the effect on biogas and methane yield. The results showed that Anaerobic Digestion Model No.1 and the artificial neural network are suitable for replicating the dynamics of a full-scale co-digestion plant. For the tested period, the artificial neural network showed a better fit for biogas and methane content than the Anaerobic Digestion Model No. 1. Simulations showed that co-digestion with microalgae tended to reduce biomethane production. However, this depended on the species and biodegradability of the microalgae. The results also showed that inclusion of microalgae could decrease carbon dioxide emissions in both types of plants and decrease the energy demand of the studied wastewater treatment plants. The extent of the decrease in the wastewater treatment plants depended on surface volume. In the biogas plant, the inclusion of microalgae led to a lower net energy ratio for the methane compared to when using ley crop silage. Both studies show that microalgae cultivation is best suited for use in summer in the northern climate.
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Rodríguez, Abalde Ángela. "Anaerobic digestion of animal by-products : pre-treatments and co-digestion." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134769.
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The meat sector is one of the most important industrial sectors in Europe and it is associated with the generation of large quantities of animal by-products not intended for human consumption (ABPs). The increasing demand of renewable energy sources and reuse of wastes require good technological solutions for energy production such as anaerobic digestion (AD), which is included in the current European regulation as one of the allowed methods to valorize ABPs. Due to their composition, with high fat and protein content, ABPs can be considered good substrates for the AD process, according to the high potential methane yield. Although, slow hydrolysis rates and inhibitory process have been reported, with a suitable pre-treatment to improve particulate materials solubility and/or co-digestion process of several complementary materials the anaerobic digestion can be improved. Hence, the aim of this thesis was to evaluate the feasibility of different ABPs for anaerobic digestion. Emphasis was placed on the effect of pre-treatments on the organic matter, methane yield and methane production rate. Within this scope, thermal (pasteurization and sterilization) and high pressure pre-treatments (200, 400 and 600 MPa) were applied. Thermogravimetric and spectroscopy techniques (DTG-MS and FTIR), where used to determine the effects on the organic matter. The effects on the methane yield and methane production rates, including the disintegration parameters, were obtained by means of batch test with different inoculum to substrate ratios (ISR).
The suitability of ABP for anaerobic digestion was confirmed with samples from different origin (poultry and piggery slaughterhouses) but the results showed that methane yield depends on the substrate composition (amount of proteins, fats and carbohydrates), especially when a thermal pre-treatment is applied. The thermal pre-treatment produced some inhibitory nitrogen-related compounds when there was a high carbohydrate and protein concentration and also affected the methane potential rate. On the other hand, thermal pre-treatments (pasteurization and sterilization) increased the methane production rate and methane production yield in the case of a waste with high protein and fat concentration. The results of the disintegration kinetics determination underline these positive effects on the methane production rate being increased in the after pasteurization. The high pressure pre-treatments were tested with piggery ABP without obtaining any effect on the methane production or methane production rate. The study and optimization of the co-digestion of pasteurized ABP with pig slurry was reported, including the glycerin addition. It showed to be feasible and glycerin addition resulted in an improvement of the methane production. Changes in the microbial composition were followed by means of denaturing gradient gel electrophoresis (DGGE) and it was demonstrated that the microbial community of the Eubacteria domain was more sensitive to operational changes than the Archaea domain.
In conclusion, this study contributes to the understanding of the anaerobic process of ABP mainly related to the effect of the thermal pre-treatments and the optimization of the co-digestion process.El sector cárnico lleva asociada la generación de grandes cantidades de subproductos animales no destinados al consumo humano (SANDACH). La demanda de fuentes de energía renovables y la reutilización de los residuos requieren soluciones tecnológicas tales como la digestión anaerobia (DA), proceso incluido en el reglamento europeo actual como uno de los métodos permitidos para valorizar estos subproductos. Debido a su composición rica en grasa y proteína, los SANDACH son considerados buenos sustratos para la DA, dado su elevado rendimiento teórico de producción de metano, aunque se han notificado tasas de hidrólisis lentas y procesos inhibitorios. Con un pretratamiento adecuado, que mejore la solubilidad de los materiales particulados, y/o un proceso de codigestión con residuos complementarios, la DA se podría mejorar. El objetivo de la presente tesis es evaluar la viabilidad de diferentes SANDACH para la DA, centrándose principalmente en el efecto de los pretratamientos sobre la materia orgánica, el rendimiento y la tasa de producción de metano. Para ello se emplearon pretratamientos térmicos (pasteurización y esterilización) y de altas presiones (200, 400 y 600 MPa). Posteriormente, se utilizaron técnicas termogravimétricas y de espectroscopía (DTG-MS y FTIR), además de una caracterización clásica, para determinar los efectos sobre la materia orgánica, mientras que los efectos sobre la producción de metano, incluyendo los parámetros de desintegración, se obtuvieron por medio de ensayos discontinuos con diferentes ratios inoculo/sustrato. La idoneidad de los SANDACH para la DA fue confirmada con residuos de mataderos avícola y porcino, pero los resultados mostraron que el rendimiento de metano dependía de la composición relativa (proteínas, grasas e hidratos de carbono) de cada sustrato, especialmente en el caso de los pretratamientos térmicos. Se observó que cuando el residuo contenía una elevada concentración de hidratos de carbono y proteínas, se generaban compuestos nitrogenados recalcitrantes durante el pretratamiento térmico que afectaban negativamente a la tasa de producción de metano. Por el contrario, cuando el residuo tenía una concentración elevada de proteína y grasa, tanto la tasa de producción como el rendimiento de metano aumentaron tras la pasteurización y esterilización. Estos resultados fueron confirmados mediante el estudio de la cinética de desintegración. En último lugar, el pretratamiento a altas presiones, aplicadas a residuo de matadero de cerdo, no modificó la biodegradabilidad ni el rendimiento de metano del residuo. En paralelo, se estudió la codigestión en continuo de SANDACH pasteurizado con purín porcino y glicerina, optimizándose la producción de biogás mediante el control de la composición de la mezcla de residuos a tratar. Se observaron cambios en las poblaciones microbianas (monitorizados mediante DGGE) y se comprobó que las eubacterias fueron la comunidad dominante, aunque también más sensible a los cambios operacionales que las arqueas. En conclusión, la producción de biogás a partir de SANDACH se ha mostrado factible, mejorando su DA mediante codigestión con otros residuos que permitan equilibrar su composición y un pretratamiento térmico, siendo la eficacia de este muy dependiente de la composición en proteínas e hidratos de carbono.
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Cogan, Miriam Lucy. "Anaerobic co-digestion of food and algal waste resources." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/28940.
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Anaerobic digestion is a key energy and resource recovery technology. This work investigated potential organic waste resources to co-digest with household food waste (HFW) to stabilise the process and future-proof feedstock availability. This included novel feedstock macroalgae (seaweed) waste (SW). Hydrothermal (autoclave) pretreatment was also investigated to optimise energy recovery from HFW and SW. Preliminary experiments investigated the behaviour of HFW co-digested with either a green waste (GW) or paper waste (PW), using a batch-test laboratory scale and systematic approach with a revised waste mixture preparation method. Following preliminary trials, the co-digestion of HFW/SW was investigated using an air-dried SW mixture. Batch experiments to determine the biomethane potential (BMP) at different ratios of HFW to SW were set up. Co-digesting HFW and SW at ratio 90:10 (d.w.) achieved a BMP similar to HFW alone (252±13 and 251±1 cm3 g-1 VS, respectively), and a peak methane yield for HFW:SW (90:10) at day 12 of 69±3% compared to a peak methane yield for HFW at day 19 of 70±3%. Addition of SW optimised the C/N ratio, increased concentrations of essential micronutrients and produced an overall increase in reaction kinetics. Concentrations of SW ≥25%, associated with high sulphur levels, reduced final methane productivity. Analysis of the macroalgae strains L. digitata, U. lactuca and F. serratus from the SW mixture was carried out to compare mono-digestion and co-digestion with HFW at a 90:10 ratio and the effect of autoclave pretreatment at 136°C. Co-digestion had a positive impact on methane yields for U. lactuca and F. serratus, whilst autoclave pretreatment had no significant impact on the SW strains When results were modelled for a 320 m3 anaerobic digester treating 8m3 feed per day the theoretical energy balance showed that optimal energy production from pretreated HFW at 8.09 GJ/day respectively could be achieved. To verify the suitability of using macroalgae, known to readily uptake polycyclic aromatic hydrocarbons (PAH), toxicity tests were used to determine the impact of phenanthrene sorbed by U. lactuca on the AD process. Despite U. lactuca’s ability to biosorb phenanthrene in under 2 hours, no impact on the AD process was observed. Overall, results of this study demonstrated that co-digestion of HFW and SW, at batch laboratory scale, provide a viable and sustainable waste revalorisation solution. In addition, low temperature autoclave pretreatment increased methane production (p=0.002) from the AD of HFW.
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Chari, Pooja Surendra. "Anaerobic Co-Digestion of Food waste and Primary Sludge." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491561610829611.
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Silvestre, Tormo Gracia. "Sewage sludge anaerobic digestion : study of synergies and operational strategies of co-digestion." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/334688.
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Wastewater treatment plants (WWTPs) are characterized by their high organic matter and nutrient removal efficiency, but also by their high energy consumption. In the current context where resources are increasingly scarce, all feasible strategies to save energy emerge as an important issue for the sustainable management of WWTPs.
In this thesis, sewage sludge (SS) anaerobic co-digestion with available organic wastes, coming from different sources and having different compositions, was proposed as an interesting strategy to approach an energy self-sufficient scenario for wastewater treatment by means of an improved biogas production. The studied co-digestion strategies were focused on the effect of the co-substrates composition -lipids, by adding grease waste (GW) from the dissolved air unit of the WWTP; alcohols, by adding crude glycerol (CGY) from a biodiesel facility; and of mixed composition, when adding the organic fraction of municipal solid waste (OFMSW)- and the effect of operational temperatures mesophilic and thermophilics on the general performance of the SS anaerobic digesters.
This approach was evaluated in terms of methane yield and the stability of the process. Methane productivity increased 2.3 and 2.2 times in comparison with sewage sludge mono-digestion when the GW added amounted to 26% and 27% of the COD inlet under mesophilic and thermophilic temperature conditions, respectively. The addition of GGY showed a 2.5 increase in methane productivity under mesophilic temperature, while in thermophilic range the co-digestion showed great instability mainly due to volatile fatty acids accumulation. Addition of the OFMSW showed a 3 to 5 times increase in methane productivity compared to SS mono-digestion, when the OFMSW added amounted respectively to 51% and 33% of the COD inlet under mesophilic and thermophilic conditions respectively.
The biomass acclimatization brought about by a slow increase of the influent dose of GW, could be a good strategy to increase fat degradation and reduce the inhibitory effect of LCFAs. Thermophilic co-digestion showed a lesser tolerance to LCFAs than mesophilic, and therefore, the adaptation time to grease waste was longer.
Thermophilic anaerobic co-digestion of SS with CGY proved to be very unstable due to the extreme pH of CGY and its fast decomposition into volatile fatty acids. On the other hand, mesophilic co-digestion showed a good performance, concluding that doses above 2% v/v of CGY did not bring about an improvement on the methane yield. In this case, it can be concluded that the optimization strategy based on the C/N ratio must be modulated by other factors such as the characteristics of crude glycerol (particularly its pH and total alkalinity) and the operational temperature.
The OFMSW was proved to be a suitable co-substrate both under mesophilic and thermophilic temperature conditions. Results suggest that the addition of the OFMSW could be an adequate strategy to promote the activity of thermophilic saturated fatty acid oxidizers and acetoclastics methanogenic bacteria. In addition, the evolution of specific activities was assessed and used as a feasible tool to explain and manage the response of the system, especially when conventional control parameters were not enough to explain the performance of the reactor.
Within the obtained results, it has been demonstrated that co-digestion is a suitable approach to optimize the energy balance of a WWTP. But, depending on the composition of the organic waste and the temperature range of operation, different operational strategies should be put into practice to find the most stable process, and avoid inhibitory episodes.
Based on the results obtained with the strategies studied in this PhD thesis, sewage sludge co-digestion with different organic wastes could be expected to represent an attractive alternative to attain energy self-sufficient wastewater treatment operations, and perhaps even net energy producing WWTPsLes Estacions de Depuració d’Aigües Residuals (EDARs) es caracteritzen per la seva elevada eficiència en l’eliminació de la matèria orgànica i nutrients, però també per el seu elevat consum energètic. En aquesta tesis, la co-digestió anaeròbia de fangs d'EDAR amb residus orgànics de diferent orígens i composicions, s'ha proposat com una estratègia atractiva per apropar-se a un escenari de tractament d'aigües residuals autosostenible energèticament, per mitjà de la millora de la producció de biogàs. L’estudi de l'estratègia de co-digestió es va centrar en l'efecte de la composició dels co-substrats (lípids mitjançant l'adició de residus greixosos procedents de la unitat de flotació per aire dissolt -DAF- de l’EDAR, alcohols mitjançant l'adició de glicerina crua d'una industria de producció de biodièsel, i una composició mixta aportada per la fracció orgànica de residus municipals -FORM-), i l'efecte de la temperatura d'operació (mesòfil i termòfil) en el rendiment general del procés de digestió anaeròbia dels fangs d'EDAR. La producció de metà es va incrementar entre 2,3 i 2,2 vegades en comparació amb la mono-digestió dels fangs d'EDAR quan l'adició del residu greixós representava el 26% i el 27% de la DQO d’entrada, durant la digestió mesòfila i termòfila respectivament. L'adició de la glicerina crua va mostrar un increment en la producció de metà de 2,5 vegades durant la digestió mesòfila, mentre que el procés de co-digestió en condicions termòfiles va mostrar una elevada inestabilitat, principalment deguda a l’acumulació d’àcids grassos volàtils. L'adició de FORM va incrementar la producció de metà entre 3 i 5 vegades més que la mono-digestió dels fangs d'EDAR, quan l'adició de FORM va ser del 51% i el 33% de la DQO d'entrada, a temperatures de operació mesòfiles i termòfiles respectivament. L'adaptació de la biomassa mitjançant increments lents de la dosis del residu greixós, es va demostrar com una bona estratègia per incrementar la degradació dels lípids i reduir l'efecte inhibitori dels àcids greixosos de cadena llarga. La co-digestió termòfila va mostrar una menor tolerància als àcids greixosos de cadena llarga que la digestió mesòfila, i per tant, el temps d¿ adaptació de la biomassa termòfila va ser superior. La co-digestió anaeròbia termòfila dels fangs amb la glicerina crua va mostrar una gran inestabilitat degut al pH extrem que presentava la glicerina i la seva ràpida descomposició en àcids grassos volàtils. Per un altra banda, la co-digestió mesòfila va mostrar un bon rendiment, concloent que dosis addicionals de glicerina per damunt de 2% v/v no mostraren una millora en el rendiment de metà. L'estratègia d'optimització basada en la relació C/N cal que sigui modulada per altres factors com les característiques de la glicerina crua (especialment el pH i l’alcalinitat total) i la temperatura d'operació. La FORM es va mostrar com un co-substrat adequat per a treballar tant a rangs de temperatures mesòfiles com termòfiles. Els resultats obtinguts suggereixen que l'adició de la FORM podria ser una estratègia vàlida per fomentar l'activitat de les poblacions termòfiles oxidats d’àcids grassos saturats, i les poblacions metanogèniques acetoclàstiques. Així mateix, l'evolució de les activitats específiques es va avaluar com una eina viable per explicar i gestionar les respostes del sistema, especialment quan els paràmetres de control convencionals no van mostrar-se adequats per explicar el rendiment del reactor. Els resultats obtinguts han demostrat que la co-digestió es un bon enfocament per optimitzar el balanç energètic del les EDARs. Basant-se en els resultats obtinguts amb les estratègies de co-digestió de fangs d'EDAR estudiades en esta PhD tesis, s'espera que la co-digestió dels fangs amb diferents residus orgànics, representen una alternativa atractiva per aconseguir l’autosuficiència energètica de les EDARs, i fins i tot, que les EDARs es converteixin en instal·lacions productores netes d'energia.
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Solé, Bundó Maria. "Strategies to enhance microalgae anaerobic digestion in wastewater treatment systems : pretreatments and co-digestion." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/663207.
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Microalgae-based wastewater treatment systems are promising solutions to shift the paradigm from wastewater treatment to energy and resources recovery. In these systems, microalgae assimilate nutrients and produce oxygen which is used by bacteria to biodegrade organic matter improving water quality. Moreover, microalgae biomass can be harvested and reused to produce biofuels among other bioproducts. In this context, anaerobic digestion (AD) is one of the most consolidated and well-known technologies to convert organic waste generated in a wastewater treatment plant into bioenergy. However, microalgae AD is generally limited by their resistant cell wall, which lead to low methane potential (degradation extent) and conversion rate (degradation speed). Also, microalgae have high protein content, which can lead to ammonia nitrogen inhibition during the anaerobic digestion process.
This PhD thesis aims to overcome these drawbacks and improve the technology by combining the use of pretreatments and the co-digestion. While pretreatments act disrupting or weakening the structure of microalgae cell wall, allowing the intracellular content to become more bioavailable, anaerobic co-digestion (i.e. the simultaneous digestion with two or more substrates) can contribute to improve microalgae AD performance by increasing methane potential, diluting inhibitory compounds or getting synergies between substrates (nutrients composition, rheology, etc.) in addition to the economic advantages derived from treating several wastes in a single facility.
Firstly, co-digestion of harvested microalgae from high rate algal ponds (HRAP) used as secondary treatment for urban wastewater and primary sludge, which is produced in the same treatment process, is been investigated. Results have shown that the most suitable option to anaerobically digest microalgae from HRAPs would be the co-digestion with primary sludge at a 20-day hydraulic retention time (HRT), that leads to higher methane production (between 63% and 2.3-fold increase). The energy assessments conducted according to these results have revealed that microalgae co-digestion with primary sludge is a key technology for energy recovery in HRAPs, since the energy produced is up to 4-fold the energy consumed during the AD. Finally, potential reuse of microalgae digestates in agriculture has been investigated (including their co-digestion with primary sludge). all microalgae digestates have presented suitable properties for agricultural soils amendment, although digestate from co-digestion has presented the least phytotoxicity.
Besides, co-digestion with storable agricultural wastes (i.e. wheat straw) is been evaluated. As it happens to microalgae, wheat straw AD is limited by hydrolysis step due to its lignocellulosic structure. Thus, their co-digestion with microalgae is also being investigated after a simultaneous thermo-alkaline pretreatment to both substrates. Results have shown that wheat straw co-digestion (50% VS) at 20-day HRT has increased microalgae methane yield by 77% as compared to microalgae mono-digestion (from 0.12 L CH4/g VS to 0.21 L CH4/gVS). On the other way around, pretreatment has only increased the methane yield by 15% as compared to untreated substrates co- digestion (0.24 L CH4/g VS). Thus, the co-digestion of microalgae and wheat straw is successful even without the pretreatment.
Finally, when microalgae are used as tertiary treatment, waste activated sludge (WAS) results in abundant and available co-substrate. As a novelty, in this PhD thesis, microalgae and WAS co-digestion is investigated after applying a simultaneous autohydrolysis pretreatment at 55 °C to improve microalgae biodegradability by promoting inherent enzymes release from WAS. However, results have shown that WAS enzymes have not been effective at disrupting microalgae cell wall. Anyway, WAS co-digestion (80% VS) after pretreatment has increased microalgae mono-digestion methane yield up to 130%.Els sistemes de tractament d'aigües residuals amb microalgues són solucions tecnològiques que permeten canviar el paradigma del tractament d'aigües residuals a la recuperació d'energia i recursos. En aquests sistemes, les microalgues assimilen nutrients i produeixen oxigen que utilitzen els bacteris per a la biodegradació de matèria orgànica, millorant així la qualitat de l'aigua. A més, la biomassa de microalgues es pot recol·lectar i reutilitzar per produir biocombustibles. En aquest context, la digestió anaeròbia és una de les tecnologies més establertes que permeten convertir els residus orgànics generats en una depuradora en bioenergia. No obstant això, la digestió anaeròbia de microalgues està generalment limitada per la seva resistent paret cel·lular, i per aquest motiu presenten un baix potencial de metà i una Baixa taxa de degradació (velocitat de degradació). A més, les microalgues tenen un elevat contingut en proteïnes, fet que pot conduir a la inhibició per amoníac durant el procés de digestió anaeròbia. Aquesta tesi doctoral pretén millorar la tecnologia de la digestió anaeròbica combinant l’aplicació de pretractaments amb la co-digestió. Mentre que els pretractaments actuen per alterar o debilitar l'estructura de la paret cel·lular de les microalgues, permetent que el contingut intracel·lular sigui biodisponible, la co-digestió (és a dir, la digestió simultània amb dos o més substrats) pot contribuir a millorar el rendiment de la digestió de les microalgues augmentant el potencial de metà, diluint compostos inhibidors o fomentant sinergies entre substrats (composició de nutrients, reologia, etc.), a més dels avantatges econòmics derivats del tractament de diversos residus en una única instal·lació. En primer lloc, s'ha investigat la co-digestió de les microalgues procedents de llacunes d’alta càrrega (LLAC), utilitzades com a tractament secundari per a aigües residuals urbanes, i fangs primaris, que es produeixen en el mateix procés de tractament. Els resultats obtinguts indiquen que l'opció més adequada per digerir microalgues és amb la codigestió amb fang primari en un temps de retenció hidràulica (TRH) de 20 dies. Els balanços energètics duts a terme d'acord amb aquests resultats han mostrat que l'energia produïda és fins a 4 vegades l'energia consumida durant la digestió anaeròbica. Finalment, s'ha investigat la possible reutilització dels efluents de la digestió de microalgues en l'agricultura (inclosa la seva co-digestió amb fang primari). Tots els digestats de microalgues han presentat propietats adequades per se utilitzats com esmena de sòls agrícoles, tot i que l’efluent procedent de la codigestió ha presentat la menor fitotoxicitat. Complementàriament, s'ha avaluat la codigestió amb residus agrícoles que puguin ser emmagatzemables (palla de blat). Com passa amb les microalgues, la digestió anaeròbia de palla de blat està limitada per hidròlisi a causa de la seva estructura lignocel·lulosica. Per tant, la seva codigestió ambles microalgues també s'ha investigant després d'un pretractament simultani a tots dos substrats (termoalcalí). Quan les microalgues s'han co-digerit amb palla de blat, el rendiment del metà ha augmentat des de 0,12 L CH4 / g VS fins a 0,21 L CH4 / gVS (augment del 77%), mentre que el pretractament només ha augmentat el rendiment del metà en un 15% en comparació amb la codigestió dels substrats no tractats (0,24 L CH4 / g VS). Per últim, s’ha investigat la codigestió de microalgues i fangs biològics després d'aplicar un pretractament simultani a ambdós substrats d'autohidròlisi (55 °C). L’objectiu d’aquesta estratègia és millorar la biodegradabilitat de les microalgues per mitjà de l'alliberament d'enzims inherents als fangs. Tot i que en els assajos s’ha vist que els enzims alliberats pels fangs no han estat eficaços degradant la paret cel·lular de les microalgues, la codigestió amb els fangs biològics després del pretractament ha permès permet augmentar la producció de metà de les microalgues fins a un 130%.
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Hamzawi, Nancy. "Anaerobic co-digestion of municipal solid waste and sewage sludge." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq21990.pdf.
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Flisberg, Kristina. "Anaerobic Co-digestion of Sewage sludge, Algae and Coffee Ground." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10206.
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Energy shortfall and air pollution are some of the challenges the human kind is facing today. Fossil fuel is still the most widely used fuel, which is a non-renewable resource, increasing excess carbon dioxide into the air. To overcome these issues, and reduce the carbon footprint, a greater development of renewable energy from green and natural resources is required. Compared to fossil energy, renewable energy has the benefit to reduce greenhouse gas emissions. There are different solutions available for green and renewable energy. Biomass is all biologically produced matter. Through the biological breakdown of biomass, biogas can be produced through the process called anaerobic digestion. This work was focused on the production of biogas, using algal biomass, sewage sludge and coffee grounds in an anaerobic co-digestion system. The main goal of this study was to investigate the feasibility of combining these three substrates. Two different types of algae were employed; Chlorella vulgaris and Scenedesmus sp. and the investigations included even the cultivation and harvesting of algal biomass. The production of biogas was examined under anaerobic conditions using 5 batch reactors in duplicate under constant temperature of 37 °C in 30 days. The result showed that co-digestion of algal biomass with sewage sludge led to an enhanced biogas production by 75 % compared to that of just sewage sludge. This indicates the synergistic effects of co-digestion. However, the addition of coffee ground to the mixture lowered the biogas production. All mixtures except the two with coffee grounds were in neutral pH. Methanogens, involved in the last step in biogas production are very sensitive to pH, and pH around 7 is the optimal for their activity. Furthermore, the presence of caffeine in the coffee ground could also inhibit the biogas production.
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Machado, Francisca LÃvia de Oliveira. "Co-anaerobic digestion of microalgae and glycerol from biodiesel residual." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8714.
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CoordenaÃÃo de AperfeiÃoamento de NÃvel SuperiorMicroalgae, microscopic life forms with photosynthetic capacity, produce oxygen thanks to light energy. Due to this capacity, microalgae are used for sewage treatment in stabilization ponds, however, this activity generates a large amount of microalgal biomass. In view of this excess of biomass production and its disposal in water bodies produces unpleasant effects, it has been evaluated the re-use of this biomass as a substrate for methane production in anaerobic digestion. Since microalgae have a rigid cell wall, the application of microalgae hydrolysis tests was necessary in order to improve its biodegradability. Heat pretreatment for 30 minutes at 120ÂC and 1 kgf/cm2 resulted in the best pretreatment applied. In order to improve C/N ratio, residual glycerol coming from biodiesel production was used to perform co-digestion with microalgae. Residual glycerol coming from biodiesel production (1Kg of glycerol per 10 Kg of biodiesel generated) is an impure residue which is also produced at large scale as a byproduct from the trans-esterification of fats and oils. In fact, the presence of impurities limits its applications. In this study, different COD/N ratios of 20 (phase 2), 40 (phase 3) and 70 (phase 4) were tested and the organic loading rate (OLR) applied ranged from 0,06 to 0,75 kg/m3.d. In the phase 1 only microalgae was used on the influent. Two modified UASB reactors were used. One of them was fed with pretreated microalgae, while the other one was fed with non-pretreated microalgae. Both of them were operated in co-digestion with glycerol. COD removal efficiencies ranged between 40% and 90%. Biogas produced presented values of 73% and 84% for each bioreactor treating pretreated and non-pretreated microalgae, respectively. Neither nitrogen nor ammonia and total and volatile suspended solids was significantly removed. Moreover, microalgae were the sole source of macro and micro-nutrients in this work. Sodium bicarbonate was used as a buffer during the phase 4, since pH fall down enough to harm the anaerobic digestion process at the beginning of phase 4. Based on the maintenance of adequate VFA/Alk ratios, both reactors presented a stable operation, specially the reactors treating pre-treated microalgae. Instability periods were mainly observed in some operation phases in the reactor without pretreatment. Specific methanogenic activity tests were carried out in order to evaluate the quality of the inoculum in terms of activity and methane production. Methane production presented a mean value of 0,26 g DQO-CH4/g SSV.d.
As microalgas, seres microscÃpicos com capacidade fotossintÃtica, produzem oxigÃnio na presenÃa de energia luminosa. Devido a isso as microalgas sÃo utilizadas para tratamento de esgotos em lagoas de estabilizaÃÃo, porÃm essa atividade gera uma grande quantidade de biomassa algal. Tendo em vista a produÃÃo dessa biomassa e sua destinaÃÃo em corpos hÃdricos provocando efeitos desagradÃveis, buscou-se avaliar a reutilizaÃÃo dessa biomassa como substrato para produÃÃo de metano a partir da digestÃo anaerÃbia. Devido à presenÃa de uma parede celular rÃgida, verificou-se a necessidade da aplicaÃÃo de testes de hidrÃlise para as microalgas com a finalidade de melhorar sua biodegradabilidade, sendo observado o melhor prÃ-tratamento aplicado, o tÃrmico por 30 minutos a 120ÂC e 1 kgf/cm2. Para melhorar a relaÃÃo C/N, utilizou-se o glicerol residual do biodiesel para realizaÃÃo de co-digestÃo com microalgas. O glicerol residual do biodiesel (1 kg de glicerol para cada 10 kg de biodiesel produzido), alÃm de ser um resÃduo impuro, à tambÃm produzido em grande escala como subproduto da transesterificaÃÃo de Ãleos e gorduras e sem muitas aplicaÃÃes devido exatamente a presenÃa de impurezas. Foram testadas relaÃÃes DQO/N de 20 (fase 2), 40 (fase 3) e 70 (fase 4), alÃm da relaÃÃo apenas das microalgas (fase 1), sendo as COV aplicadas, variando de 0,06 a 0,75 kg/m3.d. Foram utilizados dois reatores semelhantes ao UASB (UASB modificado), nos quais continham microalgas brutas e prÃ-tratadas, ambos em co-digestÃo com o glicerol. As remoÃÃes de DQO variaram de 40 a 90%. O biogÃs produzido teve rendimentos de atà 73% para o reator degradando microalgas prÃ-tratadas e 84% para o reator degradando microalgas brutas. NÃo houve remoÃÃes significativas de amÃnia e sÃlidos suspensos totais e volÃteis, tambÃm nÃo foram utilizados macro e micronutrientes, sendo esses nutrientes fornecidos apenas pelas microalgas. O bicarbonato de sÃdio como tampÃo foi utilizado apenas na Ãltima fase (fase 4), devido a queda do pH para uma faixa nÃo aceitÃvel para digestÃo anaerÃbia, no inÃcio dessa fase. As condiÃÃes de estabilidade foram mantidas, baseadas na relaÃÃo AGV/Alc, que se manteve em faixas aceitÃveis, principalmente para o reator operando microalgas prÃ-tratadas, sendo observado valores indicativos de instabilidade em algumas fases no reator sem prÃ-tratamento. Foi realizado teste de atividade metanogÃnica especÃfica para avaliar o lodo de inÃculo quanto a atividade e produÃÃo de metano, obtendo-se valor mÃdio de 0,26 g DQO-CH4/g SSV.d.
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Ravikumar, Gopinath Mitta Mohana, and Gopalam Kiran Kumar. "Investigations on the nitrogen inhibition during an anaerobic co-digestion process." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20789.
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Nitrogen Inhibition during an anaerobic co-digestion process was studied in this work.The substrate and inoculum used were obtained from a thermophilic biogas plant Sobacken,situated in Borås, Sweden. The batch experiments have been carried out in triplicate reactorswith different concentrations of ammonia ranging from 2400mg/l to 3400mg/l. The batchexperiment was working well for the all the concentrations of ammonia investigated. Theaverage methane yield was around 0.65 Nm3 CH4/kgVS for all the reactors. The laboratorywork has been further proceeded with a continuous process having two reactors working inparallel. Reactor 1 containing only substrate and the Reactor 2 contain substrate with surplusammonia added to make final concentration of 3400mg/l. The reactors were operated atorganic loading rate (OLR) of 3.3gVS/l/day and hydraulic retention time (HRT) of 20 days.Both reactors worked well for 29 days. During a period of an initial stable operation, theaverage methane production of Reactor 1 was 0.59 Nm3CH4/kgVS/day and for Reactor 2 theproduction rate was 0.56 Nm3CH4/kgVS/day. Then Reactor 1 showed a steady decrease in pHand methane production, while Reactor 2 showed stable operation for a few days longer withdecreasing pH and methane production only from day 36. The composition of substrate wasnot optimal; therefore the inhibition level of ammonium could not be determined.
Books on the topic "Anaerobic co-digestion"
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Anaerobic Co-Digestion of Lignocellulosic Waste. MDPI, 2021. http://dx.doi.org/10.3390/books978-3-0365-1143-6.
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Pilli, Sridhar, Tanaji T. More, Song Yan, Rajeshwar D. Tyagi, Rao Y. Surampalli, and Tian C. Zhang. "Anaerobic Digestion or Co-Digestion for Sustainable Solid Waste Treatment/Management." In Sustainable Solid Waste Management, 187–232. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784414101.ch08.
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Dolci, Giovanni. "Influence of the Collection Equipment on Organic Waste Treatment: Technical and Environmental Analyses." In Civil and Environmental Engineering for the Sustainable Development Goals, 15–28. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99593-5_2.
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AbstractThe research investigated the influence of different collection bag types on the environmental and energy performances of the food waste management chain, comparing paper and bioplastic bags. First, the use of bags during the food waste household storage was examined. Subsequently, the behavior of bags when subjected to anaerobic digestion was evaluated, performing Biochemical Methane Potential tests and semi-continuous co-digestion tests with the food waste, to simulate the operating conditions of full-scale digesters. Finally, the performances of the food waste management chain were evaluated, with a Life Cycle Assessment (LCA). The experimental tests showed a more favorable behavior of paper bags, showing a very good compatibility with the anaerobic digestion. The LCA results revealed how paper bags lead to improvements in the impact associated to the food waste management. Graphical Abstract
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Polley, Devnita, and Sudhir Jain. "Review of Anaerobic Digestion of Landfill Leachate and its Co-digestion Potential." In Springer Proceedings in Energy, 11–21. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5758-3_2.
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Anand, N., Sankar Ganesh Palani, Pankaj Pathak, and B. Siva Prasad. "Anaerobic Co-digestion of Landfill Leachate with Other Feedstocks." In Circular Economy in Municipal Solid Waste Landfilling: Biomining & Leachate Treatment, 167–88. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07785-2_8.
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Anand, N., Srinjoy Roy, and P. Sankar Ganesh. "Anaerobic Co-Digestion of Landfill Leachate and Sewage Sludge." In Biomethane through Resource Circularity, 133–40. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003204435-14.
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Salehiyoun, Ahmad Reza, Maria Francesco Di, Mohammad Sharifi, Omid Noroozi, Hamid Zilouei, and Mortaza Aghbashlo. "Anaerobic Co-digestion of Sewage Sludge and Animal by-Product." In Recent Trends in Waste Water Treatment and Water Resource Management, 1–10. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0706-9_1.
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Hurst, G., M. Peeters, and S. Tedesco. "Integration of Catalytic Biofuel Production and Anaerobic Digestion for Biogas Production." In Springer Proceedings in Energy, 125–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_16.
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AbstractThe drive towards a low carbon economy will lead to an increase in new lignocellulosic biorefinery activities. Integration of biorefinery waste products into established bioenergy technologies could lead to synergies for increased bioenergy production. In this study, we show that solid residue from the acid hydrolysis production of levulinic acid, has hydrochar properties and can be utilised as an Anaerobic Digestion (AD) supplement. The addition of 6 g/L solid residue to the AD of ammonia inhibited chicken manure improved methane yields by +14.1%. The co-digestion of biorefinery waste solids and manures could be a promising solution for improving biogas production from animal manures, sustainable waste management method and possible form of carbon sequestration.
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Das, Amar Kumar, and Achyut Kumar Panda. "Effective Utilisation of Kitchen Waste to Biogas by Anaerobic Co-digestion." In Lecture Notes in Civil Engineering, 1–10. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0990-2_1.
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Atukunda, Anita, Mona G. Ibrahim, Manabu Fujii, Shinichi Ookawara, and Mahmoud Nasr. "A Sustainable Strategy for Petrochemical Wastewater Treatment via Anaerobic Co-Digestion." In Sustainable Development of Water and Environment, 117–28. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07500-1_11.
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Krou, Nitale M’Balikine, Gnon Baba, and Ogouvidé Akpaki. "Anaerobic Co-Digestion of Drain Sludge with Fermentescibles Municipal Waste of Sokodé (Togo)." In Biomethane through Resource Circularity, 109–17. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003204435-11.
Full textConference papers on the topic "Anaerobic co-digestion"
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Stephanie A Lansing, Jay F Martin, and Raul Botero Botero. "Optimizing Small-scale Anaerobic Digestion in Costa Rica through Co-digestion." In 2009 Reno, Nevada, June 21 - June 24, 2009. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2009. http://dx.doi.org/10.13031/2013.26989.
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Xiguang Chen, Rowena Tangonan Romano, Ruihong Zhang, and Hyo-Sun Kim. "Anaerobic Co-Digestion of Dairy Manure and Glycerin." In 2008 Providence, Rhode Island, June 29 - July 2, 2008. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.25099.
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Sai Krishna Reddy Yadanaparthi and Lide Chen. "Anaerobic Co-digestion of Dairy Manure with Potato Waste." In 2013 Kansas City, Missouri, July 21 - July 24, 2013. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2013. http://dx.doi.org/10.13031/aim.20131590341.
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"Anaerobic Co-digestion of Swine Wastewater and Vegetable Wastes." In 2015 ASABE International Meeting. American Society of Agricultural and Biological Engineers, 2015. http://dx.doi.org/10.13031/aim.20152189652.
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Jamil, Zadariana, Nurul Azwa Mohd Yunus, Mohamad Suffian, and Shaliza Ibrahim. "Anaerobic co-digestion of food waste for biohydrogen production." In 2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC). IEEE, 2013. http://dx.doi.org/10.1109/beiac.2013.6560133.
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Wang, Xuemei, Zifu Li, Ruiling Gao, Fubin Yin, and Dongling Wang. "Experimental study on optimization of multiple substrates anaerobic co-digestion." In 5th International Conference on Information Engineering for Mechanics and Materials. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icimm-15.2015.155.
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Feng Lei and Li Rundong. "Anaerobic Co-digestion of Cow-manure and source separation BMW." In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5536051.
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Wickramaarachchi, A. L., P. G. Rathnasiri, M. Narayana, M. Torrijos, and R. Escudie. "Kinetic Modeling of Dry Anaerobic Co-Digestion of Lignocellulosic Biomass." In 2019 Moratuwa Engineering Research Conference (MERCon). IEEE, 2019. http://dx.doi.org/10.1109/mercon.2019.8818752.
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Kuusik, Argo, Karin Pachel, Aare Kuusik, and Enn Loigu. "Anaerobic co-digestion of sewage sludge with fish farming waste." In The 9th International Conference "Environmental Engineering 2014". Vilnius, Lithuania: Vilnius Gediminas Technical University Press “Technika” 2014, 2014. http://dx.doi.org/10.3846/enviro.2014.084.
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Mendoza, Luis, Yeraldin Gonzalez, Erick Ortiz, Marian Ramirez, Euclides Deago, and Arthur James. "Use of Biochar to Improve Biomethanization in Anaerobic Co-Digestion." In 2022 8th International Engineering, Sciences and Technology Conference (IESTEC). IEEE, 2022. http://dx.doi.org/10.1109/iestec54539.2022.00093.
Full textReports on the topic "Anaerobic co-digestion"
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Navaratnam, Navaneethan, and Daniel Zitomer. Anaerobic Co-digestion for Enhanced Renewable Energy and Green House Gas Emission Reduction. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1346734.
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