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Artykuły w czasopismach na temat „Specific methane production”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Deines, Peter, and Jonathan Grey. "Site-specific methane production and subsequent midge mediation within Esthwaite Water, UK." Archiv für Hydrobiologie 167, no. 1-4 (2006): 317–34. http://dx.doi.org/10.1127/0003-9136/2006/0167-0317.

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Bortolini, Joseane, Maria Hermínia Ferreira Tavares, Ana Claudia Guedes Silva, Dayane Taine Freitag, Leandro Fleck, and Osvaldo Kuczman. "Effect of different inoculations on biogas and methane production through anaerobia biodigeston using residues from the avícola sector." Ciência e Natura 42 (March 4, 2021): e52. http://dx.doi.org/10.5902/2179460x40563.

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The present study aimed to analyze the use of different digestates as inocula for the anaerobic digestion of poultry litter, evaluating the biogas and methane production. The inocula used were: bovine and porcine biofertilizer; with feeding loads of 0.67, 1.00 and 1.67 gVS L-1 day-1. Statistical analyses followed a split-plot design, where the main plot being inoculum and the feeding load as secondary. The experimental data were submitted to analysis of variance, at the level of 5% of significance. The following variable responses were considered: biogas production, specific biogas production

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Bortolini, Joseane, Ana Claudia Guedes Silva, Maria Hermínia Ferreira Tavares, Dayane Taine Freitag, Leandro Fleck, and Osvaldo Kuczman. "Effect of different inoculations on biogas and methane production through anaerobia biodigeston using residues from the avícola sector." Ciência e Natura 42 (June 29, 2020): e73. http://dx.doi.org/10.5902/2179460x40560.

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The present study aimed to analyze the use of different digestates as inocula for the anaerobic digestion of poultry litter, evaluating the biogas and methane production. The inocula used were: bovine and porcine biofertilizer; with feeding loads of 0.67, 1.00 and 1.67 gVS L-1 day-1. Statistical analyses followed a split-plot design, where the main plot being inoculum and the feeding load as secondary. The experimental data were submitted to analysis of variance, at the level of 5% of significance. The following variable responses were considered: biogas production, specific biogas production

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4

Mrůzek, Martin, and Bořivoj Groda. "Analysis of biogas production from grass silage, depending on its quality." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 59, no. 6 (2011): 239–46. http://dx.doi.org/10.11118/actaun201159060239.

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This article (work) gives information about production of methane from 11 samples of grass silage. Production was studied in two following levels: specific methane production per 1 kg of organic total solids, specific methane production per 1 kg of fresh material.These grass silage samples were at the same time analyzed from the point of view of feeding properties and quality: protein, digestible protein, fiber, acid-detergent fiber (ADF), neutral- detergent fiber (NDF), BNVL, lactic acid, acetic acid, butyric acid, starch values, metabolizable energy, total energy, net energy lactation, net e

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Bae, Ilho, Seokbo Park, Juhee Shin, Jin Mi Triolo, and Seung Gu Shin. "Country-Specific Modeling of Methane Production and Emission Reduction Utilizing Pig Manure." Energies 18, no. 1 (2024): 95. https://doi.org/10.3390/en18010095.

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The purpose of this study is to effectively support the operation of biogas plants that utilize anaerobic digestion of pig manure. An analysis was conducted on the characteristics of manure collected from 17 pig farms. Following this, the methane potential of the manure was evaluated, and a comparison of microbial communities was made at the end of the biochemical methane potential test. Based on these analyses, methane production during anaerobic digestion was modeled under various scenarios, allowing for the calculation of expected electricity generation and carbon dioxide reduction. The exp

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Haitl, Martina, Tomáš Vítěz, Tomáš Koutný, Radovan Kukla, Tomáš Lošák, and Ján Gaduš. "Use of G-phase for biogas production." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 60, no. 6 (2012): 89–96. http://dx.doi.org/10.11118/actaun201260060089.

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Biogas is very promising renewable energy resource. The number of biogas plants increase every year. Currently there is a demand for new ways of organic waste treatment from production of different commodities. One of the technologies which produce waste is biodiesel production. One of the wastes from the biodiesel production is G-phase which is mainly consisted from glycerol and methanol. The aim of work was to find the effect of G-phase addition, to fermented material, on biogas resp. methane production. Two lab-scale batch anaerobic fermentation tests (hydraulic retention time 14 and 22 day

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7

Seppälä, Mari, Teija Paavola, Annimari Lehtomäki, and Jukka Rintala. "Biogas production from boreal herbaceous grasses – Specific methane yield and methane yield per hectare." Bioresource Technology 100, no. 12 (2009): 2952–58. http://dx.doi.org/10.1016/j.biortech.2009.01.044.

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Zhang, Zhen, Shujian Tian, Jun Liu, Peng-Yan Guo, and Jie Shen. "Influence of Animal/Plant Activated Biochar Properties on Methane Production from Corn Stalk by Anaerobic Fermentation." Fermentation 8, no. 8 (2022): 397. http://dx.doi.org/10.3390/fermentation8080397.

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Activated biochar (ABC) was prepared from typical plant/animal biochar (pig bone biochar/corn stalk biochar) by optimizing the gas production characteristics of anaerobic fermentation. The effects of the physical and chemical properties (specific surface area, surface functional group and conductivity) of ABC on the gas production characteristics of anaerobic fermentation were investigated. The results showed that the effect of pig-bone activated biochar (PABC) on anaerobic fermentation gas production characteristics was better than that of corn-stalk activated biochar (CABC). The peak period

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9

Peled, Y., T. Gilat, E. Liberman, and Y. Bujanover. "The Development of Methane Production in Childhood and Adolescence." Journal of Pediatric Gastroenterology and Nutrition 4, no. 4 (1985): 575–79. http://dx.doi.org/10.1002/j.1536-4801.1985.tb08910.x.

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SummaryMethane concentration in the expired air was analyzed in 393 infants, children, and adolescents. There was no methane production below the age of 3 years. In the age group 3 4 years, 6.4% of the children produced methane. The percentages were 14.3 18.2% in children aged 7 14. A rise in methane production to 39.4 45.9% was recorded from age 14 to 18, as compared with 49.4% in adults in Israel. The reasons for these changes in methane production with age are not known. Alterations in the colonic flora or the production of a specific substrate(s) are the main possibilities. In our opinion,

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10

O'Kelly, JC, and WG Spiers. "Effect of monensin on methane and heat productions of steers fed lucerne hay either ad libitum or at the rate of 250 g/hour." Australian Journal of Agricultural Research 43, no. 8 (1992): 1789. http://dx.doi.org/10.1071/ar9921789.

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The effect of monensin supplement (33 mg/kg feed) on methane and heat productions was studied in Brahman steers offered lucerne hay in two feeding regimes: ad libitum (AL) or at the rate of 250 g/h (GPH). The monensin treated animals consumed 65 kg less feed than untreated animals in achieving a mean liveweight gain of.56 kg over 54 days of feeding AL. The 10.5% reduction in daily feed intake due to monensin was associated with a 25.6% reduction in methane production. At equalized feed intakes (adjustments made by covariance) approximately 55% of the reduction in methane caused by monensin was

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Paul, Roshni, Alla Silkina, Lynsey Melville, Sri Suhartini, and Michael Sulu. "Optimisation of Ultrasound Pretreatment of Microalgal Biomass for Effective Biogas Production through Anaerobic Digestion Process." Energies 16, no. 1 (2023): 553. http://dx.doi.org/10.3390/en16010553.

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The anaerobic digestion, AD, process presents a solution for sustainable waste management, greenhouse gas mitigation and energy production for growing population needs and requirements. Adopting a biorefinery approach that utilises different feedstock may enhance energy production and support optimisation of the anaerobic digestion process. Algae is a promising feedstock that could be used for energy production via the anaerobic digestion process. Microalgal biomass is rich in carbohydrates and lipids; however, many species of algae exhibit tough cell walls that could also be difficult to dige

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12

Bujanover, Y., Y. Peled, H. Blau, J. Yahav, D. Katzenelson, and T. Gilat. "Methane Production in Patients with Cystic Fibrosis." Journal of Pediatric Gastroenterology and Nutrition 6, no. 3 (1987): 377–80. http://dx.doi.org/10.1002/j.1536-4801.1987.tb09312.x.

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SummaryMethane production was studied in 28 cystic fibrosis patients aged 3–16 years and in 290 healthy children. The percentages of methane producers in the cystic fibrosis and control groups were 60.7 and 20.6%, respectively. In the patient group there was no difference between methane producers and nonproducers with respect to the degree of malabsorption or the administration of pancreatic supplements or antibiotics. We hypothesize that the high proportion of methane producers in cystic fibrosis patients may be associated with the presence of specific substrate(s) (glycoprotein?) in their i

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13

Wielgosz-Grochowska, Justyna Paulina, Nicole Domanski, and Małgorzata Ewa Drywień. "Influence of Body Composition and Specific Anthropometric Parameters on SIBO Type." Nutrients 15, no. 18 (2023): 4035. http://dx.doi.org/10.3390/nu15184035.

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Recent observations have shown that Small Intestinal Bacterial Overgrowth (SIBO)affects the host through various mechanisms. While both weight loss and obesity have been reported in the SIBO population due to alterations in the gut microbiome, very little is known about the influence of SIBO type on body composition. This study aimed to evaluate whether there is a link between the three types of SIBO: methane dominant (M+), hydrogen dominant (H+), and methane–hydrogen dominant (H+/M+) and specific anthropometric parameters. This observational study included 67 participants (W = 53, M = 14) wit

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14

Chamrádová, K., and J. Rusín. "Production of Biogas through Anaerobic Cofermentation of Cattle Slurry with Biscuit Waste." GeoScience Engineering 62, no. 1 (2016): 26–30. http://dx.doi.org/10.1515/gse-2016-0005.

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Abstract The paper presents the results of the model of anaerobic co-fermentation of cattle slurry with biscuit waste. It was confirmed that the waste from the food industry is a valuable biogas substrate. The highest specific production of methane (0.49 mN3·kgVS-1) was achieved in the co-fermentation of 20 wt% biscuit waste with cattle slurry. The feed mixture contained 22 wt% of total solids. The biscuit waste has the specific production of biogas 0.66 mN 3·kg-1 and the specific production of methane 0.38 mN 3·kg-1.

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Kariyama, Ibrahim Denka, Weixiang Li, Shaoqi Yu, et al. "Simplified Modeling of High-Solids Anaerobic Digestion of Dairy Manure in a Pilot-Scale Stirred Tank Anaerobic Digester." Journal of the ASABE 66, no. 2 (2023): 231–43. http://dx.doi.org/10.13031/ja.15203.

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Highlights HSAD is a cost-effective approach for managing high-solids manure. Batch digestion of HSAD at a low inoculum ratio is unsuitable. Mixing once a day was enough to maintain a stable digestion process. The stoichiometric method with an appropriate biodegradability factor provided perfect prediction. Simplified biokinetics can predict methane productivity at steady-state conditions. Abstract. Anaerobic digestion (AD) is considered one of the most effective methods of managing dairy manure. To effectively and economically treat the huge volumes of manure produced by commercial dairy farm

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Singh, Dhruv, Piero Sirini, and Lidia Lombardi. "Green Hydrogen Production from Biogas or Landfill Gas by Steam Reforming or Dry Reforming: Specific Production and Energy Requirements." Energies 18, no. 10 (2025): 2631. https://doi.org/10.3390/en18102631.

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Biogas is a crucial renewable energy source for green hydrogen (H2) production, reducing greenhouse gas emissions and serving as a carbon-free energy carrier with higher specific energy than traditional fuels. Currently, methane reforming dominates H2 production to meet growing global demand, with biogas/landfill gas (LFG) reform offering a promising alternative. This study provides a comprehensive simulation-based evaluation of Steam Methane Reforming (SMR) and Dry Methane Reforming (DMR) of biogas/LFG, using Aspen Plus. Simulations were conducted under varying operating conditions, including

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Valero, David, Carlos Rico, Blondy Canto-Canché, et al. "Enhancing Biochemical Methane Potential and Enrichment of Specific Electroactive Communities from Nixtamalization Wastewater using Granular Activated Carbon as a Conductive Material." Energies 11, no. 8 (2018): 2101. http://dx.doi.org/10.3390/en11082101.

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Nejayote (corn step liquor) production in Mexico is approximately 1.4 × 1010 m3 per year and anaerobic digestion is an effective process to transform this waste into green energy. The biochemical methane potential (BMP) test is one of the most important tests for evaluating the biodegradability and methane production capacity of any organic waste. Previous research confirms that the addition of conductive materials significantly enhances the methane production yield. This study concludes that the addition of granular activated carbon (GAC) increases methane yield by 34% in the first instance.

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Zhang, Zifang. "Reducing Methane Emissions in Ruminant Production: Methods and Their Impacts." E3S Web of Conferences 580 (2024): 02017. http://dx.doi.org/10.1051/e3sconf/202458002017.

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Introduction: Greenhouse gases contribute significantly to the greenhouse effect, with methane being one of the primary gases. Methane emissions largely stem from ruminant production. Reducing methane emissions from ruminants is beneficial for the environment and improves the feed efficiency of the animals. This article examines the process by which cattle produce methane in the rumen through enteric fermentation and how this methane is subsequently released into the atmosphere. Additionally, various methods to mitigate methane emissions from ruminants are summarized. Main text and discussion:

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Vítěz, Tomáš, Tomáš Koutný, Milan Geršl, et al. "Biogas and Methane Yield from Rye Grass." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 63, no. 1 (2015): 143–46. http://dx.doi.org/10.11118/actaun201563010143.

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Biogas production in the Czech Republic has expanded substantially, including marginal regions for maize cultivation. Therefore, there are increasingly sought materials that could partially replace maize silage, as a basic feedstock, while secure both biogas production and its quality.Two samples of rye grass (Lolium multiflorum var. westerwoldicum) silage with different solids content 21% and 15% were measured for biogas and methane yield. Rye grass silage with solid content of 15% reached an average specific biogas yield 0.431 m3·kg−1 of organic dry matter and an average specific methane yie

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Dechrugsa, Sumeth, and Sumate Chaiprapat. "Relationship of Substrate and Inoculum on Biochemical Methane Potential for Grass and Pig Manure Co-Digestion." Advanced Materials Research 512-515 (May 2012): 444–48. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.444.

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The effects of substrate mix ratio and inoculum/substrate ratio (ISR) on biochemical methane potential of para-grass (PG) and pig manure (PM) were investigated in batch test that maintained temperature at 35±1 oC and continuously shaked at 120 rpm. Cumulative methane production data at different mix ratios and ISRs were evaluated and fitted with Gompertz equation to derive methane production potential (mL) and maximum methane production rate (mL/d). The maximum and average methane yields at each respective ISR of 1, 2, 3, and 4 were [413.0, 315.5], [539.7, 455.6], [590.3, 472.5], and [593.1, 4

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Zazzeri, Giulia, Dave Lowry, Rebecca E. Fisher, et al. "Carbon isotopic signature of coal-derived methane emissions to the atmosphere: from coalification to alteration." Atmospheric Chemistry and Physics 16, no. 21 (2016): 13669–80. http://dx.doi.org/10.5194/acp-16-13669-2016.

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Abstract. Currently, the atmospheric methane burden is rising rapidly, but the extent to which shifts in coal production contribute to this rise is not known. Coalbed methane emissions into the atmosphere are poorly characterised, and this study provides representative δ13CCH4 signatures of methane emissions from specific coalfields. Integrated methane emissions from both underground and opencast coal mines in the UK, Australia and Poland were sampled and isotopically characterised. Progression in coal rank and secondary biogenic production of methane due to incursion of water are suggested as

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Buivydas, Egidijus, Kęstutis Navickas, and Kęstutis Venslauskas. "A Life Cycle Assessment of Methane Slip in Biogas Upgrading Based on Permeable Membrane Technology with Variable Methane Concentration in Raw Biogas." Sustainability 16, no. 8 (2024): 3323. http://dx.doi.org/10.3390/su16083323.

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While energy-related sectors remain significant contributors to greenhouse gas (GHG) emissions, biogas production from waste through anaerobic digestion (AD) helps to increase renewable energy production. The biogas production players focus efforts on optimising the AD process to maximise the methane content in biogas, improving known technologies for biogas production and applying newly invented ones: H2 addition technology, high-pressure anaerobic digestion technology, bioelectrochemical technology, the addition of additives, and others. Though increased methane concentration in biogas gives

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Stawiarski, Beate, Stefan Otto, Volker Thiel, et al. "Controls on zooplankton methane production in the central Baltic Sea." Biogeosciences 16, no. 1 (2019): 1–16. http://dx.doi.org/10.5194/bg-16-1-2019.

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Abstract. Several methanogenic pathways in oxic surface waters were recently discovered, but their relevance in the natural environment is still unknown. Our study examines distinct methane (CH4) enrichments that repeatedly occur below the thermocline during the summer months in the central Baltic Sea. In agreement with previous studies in this region, we discovered differences in the methane distributions between the western and eastern Gotland Basin, pointing to in situ methane production below the thermocline in the latter (concentration of CH4 14.1±6.1 nM, δ13C CH4 −62.9 ‰). Through the us

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S. Bejor, Ebaye, Samson Konebimotu, and Emmanuel Ekeng Ewa. "Semi-Continuous Testing: The Effect of Mechanical Pre-treatment on Degradation of Complex Organic Matter." International Journal of Applied Science and Research 07, no. 04 (2024): 158–95. http://dx.doi.org/10.56293/ijasr.2024.6012.

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This study investigates the impact of pre-treatment intensity on biogas production in anaerobic digestion processes using three different substrates: BPWSB, TWSB, and PWSB. The experimental design includes semicontinuous tests with various pre-treatment levels (PTLs) to analyze specific methane yields and process stability indicators. Reactor performance comparisons reveal differences in methane production profiles among substrates, with GWSB generally outperforming BPWSB and PWSB. Additionally, PTL4 consistently yields higher specific methane yields than PTL3 and PTL2 across all substrates du

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Rama, Haripriya, Busiswa Ndaba, Mokhotjwa Simon Dhlamini, Nicolene Cochrane, Malik Maaza, and Ashira Roopnarain. "Elucidating Key Microbial Drivers for Methane Production during Cold Adaptation and Psychrophilic Anaerobic Digestion of Cattle Manure and Food Waste." Fermentation 10, no. 7 (2024): 370. http://dx.doi.org/10.3390/fermentation10070370.

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At psychrophilic temperatures (<20 °C), anaerobic digestion produces less methane (CH4). For psychrophilic anaerobic digestion (PAD) to be successful, investigation of cold-adapted microbial consortia involved in methane production is critical. This study aimed to investigate the microbial community driving enhanced methane production from the cold-adaptation process and bioaugmentation of PAD with cold-adapted inoculum (BI). Microbial consortia in cattle manure (CM) and food waste (FW) were adapted and applied during batch PAD of CM and FW to bioaugment methane production at 15 °C. Cold ad

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Zhou, Zhenming, Qingxiang Meng, and Zhongtang Yu. "Effects of Methanogenic Inhibitors on Methane Production and Abundances of Methanogens and Cellulolytic Bacteria inIn VitroRuminal Cultures." Applied and Environmental Microbiology 77, no. 8 (2011): 2634–39. http://dx.doi.org/10.1128/aem.02779-10.

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ABSTRACTThe objective of this study was to systematically evaluate and compare the effects of select antimethanogen compounds on methane production, feed digestion and fermentation, and populations of ruminal bacteria and methanogens usingin vitrocultures. Seven compounds, including 2-bromoethanesulphonate (BES), propynoic acid (PA), nitroethane (NE), ethyltrans-2-butenoate (ETB), 2-nitroethanol (2NEOH), sodium nitrate (SN), and ethyl-2-butynote (EB), were tested at a final concentration of 12 mM. Ground alfalfa hay was included as the only substrate to simulate daily forage intake. Compared t

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Loza, Cecilia, Supriya Verma, Siegfried Wolffram, et al. "Assessing the Potential of Diverse Forage Mixtures to Reduce Enteric Methane Emissions In Vitro." Animals 11, no. 4 (2021): 1126. http://dx.doi.org/10.3390/ani11041126.

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Methane emissions from ruminants are a major contributor to agricultural greenhouse gas emissions. Thus, eight different forage species were combined in binary mixtures with Lolium perenne in increasing proportions, in vitro, to determine their methane reduction potential in ruminants. Species were sampled in two consecutive years where possible. The aims were: a) to determine if mixtures with specific forages, particularly those rich in plant specialized metabolites (PSM), can reduce methane emissions compared to ryegrass monocultures, b) to identify whether there is a linear-dose effect rela

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Burmistrova, Julia, Marc Beutel, Erin Hestir, Rebecca Ryals, and Pramod Pandey. "Anaerobic Co-Digestion to Enhance Waste Management Sustainability at Yosemite National Park." Sustainability 14, no. 19 (2022): 11877. http://dx.doi.org/10.3390/su141911877.

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This study evaluated the co-digestion of domestic wastewater solids (WWS) and food waste (FW) at the bench-scale for Yosemite National Park, California, which operates a 1900 m3/d wastewater treatment plant in El Portal, California. A 35-day biochemical methane potential test was performed on varying amounts of FW as a percentage of total waste (WWS plus FW) on a volatile solids basis (%FW). Specific methane yield and volumetric methane yield increased substantially with increasing %FW. A higher %FW was also associated with slower degradation kinetics but higher methane content in biogas. The

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Silva, A., C. Couras, I. Capela, L. Arroja, and H. Nadais. "Anaerobic Degradation of Dairy Wastewater in Intermittent UASB Reactors: Influence of Effluent Recirculation." International Journal of Systems Applications, Engineering & Development 15 (March 29, 2021): 1–6. http://dx.doi.org/10.46300/91015.2021.15.1.

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This work studied the influence of effluent recirculation upon the kinetics of anaerobic degradation of dairy wastewater in intermittent UASB (Upflow Anaerobic Sludge Bed) reactors. Several laboratory-scale tests were performed with different organic loads in a UASB reactor inoculated with flocculent sludge from an industrial wastewater treatment plant. The data obtained were used for determination of specific substrate removal rates and specific methane production rates and adjusted to kinetic models. A high initial substrate removal was observed in all tests due to adsorption of organic matt

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Silva, A., I. Capela, L. Arroja, and H. Nadais. "Anaerobic Degradation of Dairy Wastewater in Intermittent UASB Reactors: Influence of Effluent Recirculation." International Journal of Geology 15 (November 15, 2021): 35–40. http://dx.doi.org/10.46300/9105.2021.15.5.

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This work studied the influence of effluent recirculation upon the kinetics of anaerobic degradation of dairy wastewater in intermittent UASB (Upflow Anaerobic Sludge Bed) reactors. Several laboratory-scale tests were performed with different organic loads in a UASB reactor inoculated with flocculent sludge from an industrial wastewater treatment plant. The data obtained were used for determination of specific substrate removal rates and specific methane production rates and adjusted to kinetic models. A high initial substrate removal was observed in all tests due to adsorption of organic matt

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Anderson, R., G. Carstens, R. Miller, et al. "Effect of nitroethane administration on ruminal VFA production and specific activity of methane production." Journal of Animal and Feed Sciences 13, Suppl. 1 (2004): 23–26. http://dx.doi.org/10.22358/jafs/70751/2004.

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Cavaleiro, Ana J., Andreia F. Salvador, Gilberto Martins, et al. "Multi-Walled Carbon Nanotubes Enhance Methanogenesis from Diverse Organic Compounds in Anaerobic Sludge and River Sediments." Applied Sciences 10, no. 22 (2020): 8184. http://dx.doi.org/10.3390/app10228184.

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Conductive nanomaterials affect anaerobic digestion (AD) processes usually by improving methane production. Nevertheless, their effect on anaerobic communities, and particularly on specific trophic groups such as syntrophic bacteria or methanogens, is not extensively reported. In this work, we evaluate the effect of multi-walled carbon nanotubes (MWCNT) on the activity of two different anaerobic microbial communities: an anaerobic sludge and a river sediment. Methane production by anaerobic sludge was assessed in the presence of different MWCNT concentrations, with direct methanogenic substrat

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Appels, Lise, Sofie Houtmeyers, Floriaan Van Mechelen, Jan Degrève, Jan Van Impe, and Raf Dewil. "Effects of ultrasonic pre-treatment on sludge characteristics and anaerobic digestion." Water Science and Technology 66, no. 11 (2012): 2284–90. http://dx.doi.org/10.2166/wst.2012.415.

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In this work, the influence of an ultrasonic pre-treatment on anaerobic digestion of waste activated sludge is studied. Attention is paid to the solubilisation of the main organic (proteins, carbohydrates) and inorganic (heavy metals) sludge components during ultrasonic treatment and the influence of the dry solids content (DS) on the degree of solubilisation. The second part of the paper focuses on the relationship between the applied specific energy of the ultrasonic treatment and methane production. In general, a higher specific energy and a higher DS content are beneficial for the release

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Cea-Barcia, Glenda, Gloria Moreno, and Germán Buitrón. "Anaerobic digestion of mixed microalgae cultivated in secondary effluent under mesophilic and thermophilic conditions." Water Science and Technology 72, no. 8 (2015): 1398–403. http://dx.doi.org/10.2166/wst.2015.344.

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The anaerobic digestion of mixed indigenous microalgae, grown in a secondary effluent, was evaluated in batch tests at mesophilic (35°C) and thermophilic (50°C) conditions. Under mesophilic conditions, specific methane production varied from 178 to 207 mL CH4/g volatile solids (VS) and the maximum production rate varied from 8.8 to 26.1 mL CH4/(gVS day), depending on the type of microalgae culture. Lower methane parameters were observed in those cultures where Scenedesmus represents more than 95% of the microalge. The culture with the lowest digestion performances under mesophilic conditions w

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Gao, Shu Mei, Ming Xing Zhao, Wen Quan Ruan, and Yu Ying Deng. "Kinetics Modeling of Anaerobic Fermentative Production of Methane from Kitchen Waste Solid Residual." Advanced Materials Research 864-867 (December 2013): 1253–57. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.1253.

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A series of batch mesophilic anaerobic digesntion were conducted using an automatic methane potential test system (AMPTS) and the kinetics of methane production was also discussed using modified Gompertz equation, Logistic function, First-order kinetics model and Transference function, respectively. The results showed that the kitchen waste solid residual was of high biomethane potential, and the maximum specific methane yield was obtained 585 NmL/g TS at inoculums substrate ratio (ISR) 2:1. All of the four models could appropriately fit the accumulative methane production in steady state (R2&

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Parfenov, V. E., N. V. Nikitchenko, A. A. Pimenov, et al. "Methane Pyrolysis for Hydrogen Production: Specific Features of Using Molten Metals." Russian Journal of Applied Chemistry 93, no. 5 (2020): 625–32. http://dx.doi.org/10.1134/s1070427220050018.

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González Palencia, Juan C. González, Yuta Itoi, and Mikiya Araki. "Design of a Hydrogen Production System Considering Energy Consumption, Water Consumption, CO2 Emissions and Cost." Energies 15, no. 21 (2022): 7938. http://dx.doi.org/10.3390/en15217938.

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CO2 emissions associated with hydrogen production can be reduced replacing steam methane reforming with electrolysis using renewable electricity with a trade-off of increasing energy consumption, water consumption and cost. In this research, a linear programming optimization model of a hydrogen production system that considers simultaneously energy consumption, water consumption, CO2 emissions and cost on a cradle-to-gate basis was developed. The model was used to evaluate the impact of CO2 intensity on the optimum design of a hydrogen production system for Japan considering different stakehol

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Na, Risu, Keisuke Kushima, and Naoto Shimizu. "Effects of Pyrolysis on Biogas Production during Anaerobic Codigestion of Corn Stover." MATEC Web of Conferences 333 (2021): 07011. http://dx.doi.org/10.1051/matecconf/202133307011.

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The effects of pyrolysis pretreatment on biogas production during anaerobic co-digestion of corn stover were studied. The corn stover characteristics were investigated by performing thermogravimetric analysis using a heating rate of 10.0°C/min and an air atmosphere at atmospheric pressure. Corn stover aliquots pretreated in an electric furnace at 100°C for 360 min, 200°C for 15 min, and 300°C for 5 min were used. Untreated and pretreated corn stover samples were analyzed by scanning electron microscopy and other methods, and the bulk densities and component ratios were compared to identify cha

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Markov, Alexey A., Oleg V. Merkulov, and Alexey Yu Suntsov. "Development of Membrane Reactor Coupling Hydrogen and Syngas Production." Membranes 13, no. 7 (2023): 626. http://dx.doi.org/10.3390/membranes13070626.

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Simultaneous syngas and pure hydrogen production through partial oxidation of methane and water splitting, respectively, were demonstrated by using mixed ionic–electronic conductors. Tubular ceramic membranes prepared from La0.5Sr0.5FeO3 perovskite were successfully utilized in a 10 M lab scale reactor by applying a radial arrangement. The supply of methane to the middle area of the reaction zone was shown to provide a uniform distribution of the chemical load along the tubes’ length. A steady flow of steam feeding the inner part of the membranes was used as oxidative media. A described config

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Ziganshina, Elvira E., Svetlana S. Bulynina, and Ayrat M. Ziganshin. "Anaerobic Digestion of Chicken Manure Assisted by Carbon Nanotubes: Promotion of Volatile Fatty Acids Consumption and Methane Production." Fermentation 8, no. 11 (2022): 641. http://dx.doi.org/10.3390/fermentation8110641.

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In this study, the effect of different concentrations of carbon nanotubes (Taunit-M; 0.5–6.5 g L−1) on the efficiency of anaerobic digestion of chicken manure is investigated. The highest positive effect on the specific production of methane is obtained when 5.0 g L−1 of carbon nanotubes are added to the anaerobic reactors. In addition, carbon nanotubes at these concentrations stimulate the biodegradation of volatile fatty acids, mainly acetate, butyrate, and finally propionate. The maximum production rate of methane increases by 15–16% in the presence of carbon nanotubes (5.0–6.5 g L−1). Also

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Bona, Daniela, Luca Grandi, Sara Bertolini, Donato Scrinzi, Michele Zorzi, and Silvia Silvestri. "BMP TEST TO MONITOR SEASONAL EFFICIENCY OF DRY ANAEROBIC DIGESTION PLANT." Detritus, no. 31 (June 4, 2025): 62–69. https://doi.org/10.31025/2611-4135/2025.19494.

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The lack of specific monitoring tools is a hurdle for dry anaerobic digestion plant performance studies. The work aims to suggest a solid-state BMP protocol to monitor the full-scale dry anaerobic digestion process of the organic fraction of municipal solid waste. Physicochemical analyses, biomethane potential, and biodegradability data of different seasonal mixes fed in the reactor are provided. The data collected showed the effectiveness of the dry BMP test to analyse the process efficiency and to estimate the potential methane production of the biowaste. The process efficiency (expressed as

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Na, Risu, Keisuke Kushima, and Naoto Shimizu. "Effects of Pyrolysis on Biogas Production during Anaerobic Co-digestion of Corn Stover." MATEC Web of Conferences 333 (2021): 07011. http://dx.doi.org/10.1051/matecconf/202133307011.

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The effects of pyrolysis pretreatment on biogas production during anaerobic co-digestion of corn stover were studied. The corn stover characteristics were investigated by performing thermogravimetric analysis using a heating rate of 10.0°C/min and an air atmosphere at atmospheric pressure. Corn stover aliquots pretreated in an electric furnace at 100°C for 360 min, 200°C for 15 min, and 300°C for 5 min were used. Untreated and pretreated corn stover samples were analyzed by scanning electron microscopy and other methods, and the bulk densities and component ratios were compared to identify cha

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Marañón, Elena, Luis Negral, Yolanda Fernández-Nava, and Leonor Castrillón. "Influence of conditioning agents and enzymic hydrolysis on the biochemical methane potential of sewage sludge." Water Science and Technology 68, no. 7 (2013): 1622–32. http://dx.doi.org/10.2166/wst.2013.413.

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Biochemical methane potential (BMP) tests have been carried out on sewage sludge from two wastewater treatment plants to assess the effect of additives (FeCl3 and two cationic polyelectrolytes) used in sludge dewatering. BMP tests were also carried out on the concentrated solid phase from the enzymic hydrolysis pre-treatment (42 °C, 48 h). FeCl3 had no significant effect on specific methane production, obtaining 242–246 LCH4/kgVSo. The effect of the combination of polyelectrolyte and FeCl3 depended on the polyelectrolyte and the sludge, but generally led to an increase in specific methane prod

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Liu, Lei, Huan Xiong, Jun Ma, Sai Ge, Xiao Yu, and Gang Zeng. "Leachate Recirculation for Enhancing Methane Generation within Field Site in China." Journal of Chemistry 2018 (October 10, 2018): 1–7. http://dx.doi.org/10.1155/2018/9056561.

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Leachate recirculation is a critical element in the evaluation of the availability of methane production enhancement in bioreactor landfills. Field experiments in leachate injection were conducted in horizontal wells at a landfill in Hubei Province in China. The experiments included the long-term test of methane concentration and production in three cells; the test was operated with nonrecirculation (NR), continued recirculation (CR), and descending recirculation (DR). The average methane concentration in CR is 54.8%, which is higher than that in the NR and DR sites. The average biogas flow ra

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Tseng, Szu-Kung, and Chi-Jenn Yang. "The reaction characteristics of wastewater containing nitrophenol, treated using an anaerobic biological fluidized bed." Water Science and Technology 30, no. 12 (1994): 233–40. http://dx.doi.org/10.2166/wst.1994.0617.

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An anaerobic biological fluidized bed was used to treat a synthetic wastewater containing three types of nitrophenols. The results proved that para-nitrophenol (p-NP) was the most toxic nitrophenol to methane producing bacteria while meta-nitrophenol (m-NP) was found to be less toxic, with ortho-nitrophenol (o-NP) being the least toxic to the methane bacteria. The results also showed that o-NP was much more easily decomposed by the microbes on the activated carbon biofilm. During the anaerobic digestion it was found that wastewater containing o-NP had the largest specific methane production ra

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Choi, Okkyoung, Sae Eun Hwang, Hyojung Park, and Byoung-In Sang. "Anaerobic Digestion of Cigarette Butts: Microbial Community Analysis and Energy Production Estimation." Energies 14, no. 24 (2021): 8290. http://dx.doi.org/10.3390/en14248290.

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Anaerobic digestion using cigarette butts, one of most littered items, was studied not only as a waste treatment, but also as an energy production method. Methane production from cigarette butts was measured through the biochemical methane potential (BMP) test and it was evaluated whether it is possible to produce electrical energy. Intact cigarettes or individual components (filter, paper, and leaf) were supplied as the sole carbon source (substrate) for the BMP test. The tendency of methane production indicated biodegradation in the order of paper, filter, and leaves; however, the filter of

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Şahan, Murat, Mona Fardinpoor, Vedat Yılmaz, Fatih Yılmaz, and N. Altınay Perendeci. "Effects of High Temperature & Pressure Pretreatment Process on Methane Production from Cyanobacteria." Fermentation 9, no. 3 (2023): 240. http://dx.doi.org/10.3390/fermentation9030240.

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In this study, Desertifilum tharense cyanobacteria, which has energy generation potential, was firstly isolated from the water sources from Denizli/Turkey, the culture-specific parameters were identified, characterization analyses were performed, and the production in photoreactors under laboratory conditions was performed. D. tharense cyanobacterium was subjected to a high temperature–pressure pretreatment process (HTPP) to increase methane production efficiency, and the pretreatment process was optimized for methane production. D. tharense had a total carbon (C) content of 50.2% and total or

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Bohutskyi, Pavlo, Duc Phan, Ruth E. Spierling, and Trygve J. Lundquist. "Hydrothermal but Not Mechanical Pretreatment of Wastewater Algae Enhanced Anaerobic Digestion Energy Balance due to Improved Biomass Disintegration and Methane Production Kinetics." Energies 16, no. 20 (2023): 7146. http://dx.doi.org/10.3390/en16207146.

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This study used pilot-scale high-rate algae ponds to assess algal–bacteria biomass productivity and wastewater nutrient removal as well as the impact of mechanical and hydrothermal pretreatments on biomass disintegration, methane production kinetics, and anaerobic digestion (AD) energy balance. Mechanical pretreatment had a minor effect on biomass disintegration and methane production. By contrast, hydrothermal pretreatment significantly reduced particle size and increased the solubilized organic matter content by 3.5 times. The methane yield and production rate increased by 20–55% and 20–85%,

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Dębowski, Marcin, Magda Dudek, Joanna Kazimierowicz, et al. "Analysis of Multi-Biofuel Production during Cultivation of the Green Microalga Tetraselmis subscordiformis." Energies 17, no. 15 (2024): 3670. http://dx.doi.org/10.3390/en17153670.

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Research to date has mainly focused on the properties and efficiency of the production of selected, individual types of biofuels from microalgae biomass. There are not enough studies investigating the efficiency of the production of all energy sources synthesised by these microorganisms in a single technological cycle. The aim of this research was to determine the possibilities and efficiency of the production of hydrogen, bio-oil, and methane in the continuous cycle of processing T. subcordiformis microalgae biomass. This study showed it was feasible to produce these three energy carriers, bu

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Islam, Mahfuzul, Seon-Ho Kim, A.-Rang Son, Sung-Sill Lee, and Sang-Suk Lee. "Breed and Season-Specific Methane Conversion Factors Influence Methane Emission Factor for Enteric Methane of Dairy Steers." Sustainability 14, no. 12 (2022): 7030. http://dx.doi.org/10.3390/su14127030.

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This study determined the breed and the season-specific methane (CH4) conversion factor (Ym) and the emission factor (EF) for the enteric CH4 of dairy steers. The Ym values for Holstein and Jersey steers at different seasons were calculated using the IPCC 2006 equations by incorporating the input and/or output value of the chemical composition of feed, methane production, methane yield, dry matter intake, and methane energy emission. EFs were categorized into five types depending on the 2019 refinement to the IPCC 2006 Tier 2 equations used. EFA was calculated from Equation 10.21A (New), while

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