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Journal articles on the topic 'Anaerobic batch reactor'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Darwin, Darwin, Sarbaini Sarbaini, Satria Purwanto, Fatwa Dhiauddin, Muhammad Ilham, and Afrizal Fazil. "Wastewater Treatment for African Catfish (Clarias gariepinus) Culture by Using Anaerobic Process." Agritech 37, no. 4 (2018): 462. http://dx.doi.org/10.22146/agritech.13058.

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This study aimed to set up an anaerobic treatment system for the treatment of wastewater derived from the farming of African Catfish (Clarias gariepinus). In this current study, anaerobic treatment of wastewater derived from the African catfish (Clarias gariepinus) aquaculture was conducted in semi-continuous reactor as well as batch reactor under mesophilic condition at 35 °C. The results revealed that the semi-continuous reactors generated higher biogas yield (69.27 mL/g VS) compared with batch reactor (22.81 mL/g VS). High conversion rate of anaerobic treatment process operated in semi-cont

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Aydin, S., B. Ince, Z. Cetecioglu, et al. "Performance of anaerobic sequencing batch reactor in the treatment of pharmaceutical wastewater containing erythromycin and sulfamethoxazole mixture." Water Science and Technology 70, no. 10 (2014): 1625–32. http://dx.doi.org/10.2166/wst.2014.418.

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This study evaluates the joint effects of erythromycin–sulfamethoxazole (ES) combinations on anaerobic treatment efficiency and the potential for antibiotic degradation during anaerobic sequencing batch reactor operation. The experiments involved two identical anaerobic sequencing batch reactors. One reactor, as control unit, was fed with synthetic wastewater while the other reactor (ES) was fed with a synthetic substrate mixture including ES antibiotic combinations. The influence of ES antibiotic mixtures on chemical oxygen demand (COD) removal, volatile fatty acid production, antibiotic degr

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3

Hamilton, Douglas W., Hernan Fernandez-Barriales Lopez, and Emilia P. Cuesta Alonso. "Improved Mixing System for Anaerobic Sequencing Batch Reactors." Transactions of the ASABE 63, no. 4 (2020): 933–42. http://dx.doi.org/10.13031/trans.13549.

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HighlightsA novel single-jet mixing system was designed for ASBR digesters.Mixing energy was reduced to the point that solids were only partially suspended in the reactor vessel.The partial mixing system increased effluent quality as measured by suspended solids content.The partial mixing system increased solids retention, allowing hydraulic retention time (HRT) to be reduced to at least 7.5 days while maintaining solids retention time (SRT) above 100 days.The partial mixing system did not reduce biogas production rate nor biogas yield.Abstract. An anaerobic sequencing batch reactor (ASBR) is

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4

Dlabaja, T., and J. Malaťák. "Optimization of anaerobic fermentation of kitchen waste." Research in Agricultural Engineering 59, No. 1 (2013): 1–8. http://dx.doi.org/10.17221/2/2012-rae.

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Anaerobic fermentation is a suitable method of energetic and material utilisation of waste coming from restaurants and canteens. Laboratory experiments of wet anaerobic fermentation were performed in a continuous reactor and in batch reactors under mesophilic conditions. Effects of hydraulic retention time, organic loading rate, period of feeding and recirculation of digestate were examined in the continuous reactor. Effects of substrate pre-treatment (crushing, heating, freezing) were examined in the batch reactors. Degree of substrate degradation ranged between 83&ndash;85% within hydrau

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Nurandani, Hardyanti, Utomo Sudarno, Oktaviana Angelica, Serafina Katrin, and Junaidi Junaidi. "Effect of COD/SO42- Supply Ratio Variations of Sulfate-Reducing Bacteria of Sulphood Raise in Acid Mine Drainage." E3S Web of Conferences 73 (2018): 05009. http://dx.doi.org/10.1051/e3sconf/20187305009.

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Sulphur dioxide gas is one of most contaminating gas in the air. Sulphur gas can be produced by mining activities. Sulphur gas will be harmful if bond with CO2 to form as Sulphur Dioxide. To reduce the Sulphur Dioxide gas concentration we must inhibite the sulphur gas formation from mining activities. The inhibition of sulphur gas could be done by reduce the sulphate concentration in acid mine drainage. One of important factor that influencing the reduce of sulphate is COD/SO42- ratio. The effect of COD/SO42- ratio on bacterial growth and sulfate removal process can be investigated with anaero

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Bernet, N., N. Delgenès, J. P. Delgenès, and R. Moletta. "SBR as a relevant technology to combine anaerobic digestion and denitrification in a single reactor." Water Science and Technology 43, no. 3 (2001): 209–14. http://dx.doi.org/10.2166/wst.2001.0139.

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Two laboratory-scale sequencing batch reactors were used to study biological treatment of carbon and nitrogen in a new combined anaerobic-aerobic system. Piggery wastewater was used as a model effluent. The anaerobic reactor, fed with raw wastewater and nitrite/nitrate recycling from the aerobic reactor, carried out denitrification and anaerobic digestion of organic carbon. In the aerobic reactor, organic carbon removal and nitrification of ammonia to mainly nitrite occurred. Three recycle-to-influent ratios from1 to 3 were tested. The higher the recycle-to-influent ratio, the lower the concen

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Prasetyo, Elli. "Evaluasi Hydraulic Retention Time (Hrt) Terhadap Removal Chemical Demand (Cod) Dalam Pengolahan Air Lindi Menggunakan Aerobic Fluidized Bed Reactor (AFBR)." Jurnal Migasian 2, no. 2 (2018): 28. http://dx.doi.org/10.36601/jurnal-migasian.v2i2.28.

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Sampah merupakan masalah utama disetiap kota besar di indonesia. Tumpukan sampah menghasilkan air lindi dengan kandungan organik yang tinggi. Beban organik yang tinggi dan meningkatnya laju alir lindi memerlukan kolam aerasi yang luas untuk mengolah lindi. Salah satu metode pengolahan air lindi yang tepat dan efisien dengan menggunakan proses anaerobik. Anaerobic Fludized Bed Reaktor (AFBR) merupakan salah satu reactor anaerobic dengan efisiensi tinggi. Zeolit digunakan sebagai media imobilisasi bakteri untuk meningkatkan efisiensi pengolahan secara anaerobic pada reactor AFBR. Penyesuaian mod

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8

R. H. Zhang, Y. Yin, S. Sung, and R. R Dague. "ANAEROBIC TREATMENT OF SWINE WASTE BY THE ANAEROBIC SEQUENCING BATCH REACTOR." Transactions of the ASAE 40, no. 3 (1997): 761–67. http://dx.doi.org/10.13031/2013.21307.

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9

Amin, MohammadMehdi, Asadollah Nadi, Ali Fatehizadeh, AmirHesam Hassani, and MohammadReza Marasy. "Anaerobic biodegradation of ethylene dichloride in an anaerobic sequential batch reactor." International Journal of Environmental Health Engineering 1, no. 1 (2012): 35. http://dx.doi.org/10.4103/2277-9183.100137.

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10

Donoso-Bravo, Andrés, Francisca Rosenkranz, Viviana Valdivia, Michel Torrijos, Gonzalo Ruiz-Filippi, and Rolando Chamy. "Anaerobic sequencing batch reactor as an alternative for the biological treatment of wine distillery effluents." Water Science and Technology 60, no. 5 (2009): 1155–60. http://dx.doi.org/10.2166/wst.2009.565.

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The goal of this study was to assess the effect of different modes of operation and configurations of Anaerobic Sequencing Batch Reactors (ASBRs) treating phenolic wastewater. Several lab-scale reactors were used in the mesophilic range. The reactors were fed with synthetic wastewater with a COD of 5 g/L using phenol as a carbon source (variable concentration) and glucose as a co-substrate. One and two-phase (hydrolytic/acidogenic–methanogenic) systems in batch and fed-batch operation were evaluated. The one-stage reactor operated by the fed batch (which was the only configuration using phenol

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11

Sung, Shihwu, and Richard R. Dague. "Laboratory studies on the anaerobic sequencing batch reactor." Water Environment Research 67, no. 3 (1995): 294–301. http://dx.doi.org/10.2175/106143095x131501.

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12

Timur, H., and I. Özturk. "Anaerobic sequencing batch reactor treatment of landfill leachate." Water Research 33, no. 15 (1999): 3225–30. http://dx.doi.org/10.1016/s0043-1354(99)00048-2.

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13

Dague, R. R., C. E. Habben, and S. R. Pidaparti. "Initial Studies on the Anaerobic Sequencing Batch Reactor." Water Science and Technology 26, no. 9-11 (1992): 2429–32. http://dx.doi.org/10.2166/wst.1992.0754.

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This research focuses on an evaluation of the performance of a new process being called the “anaerobic sequencing batch reactor” (ASBR). The ASBR operates on an intermittent, fill and draw regimen. This results in alternating high substrate/low substrate (feast/famine) conditions. The high substrate conditions right after feeding results in high rates of substrate conversion to biogas. The low substrate concentration near the end of the react sequence results in efficient bioflocculation and solids separation.

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Ong, S. L., J. Y. Hu, W. J. Ng, and Z. R. Lu. "Granulation Enhancement in Anaerobic Sequencing Batch Reactor Operation." Journal of Environmental Engineering 128, no. 4 (2002): 387–90. http://dx.doi.org/10.1061/(asce)0733-9372(2002)128:4(387).

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15

Chang, Duk, Joon Moo Hur, and Tai Hak Chung. "Digestion of municipal sludge by anaerobic sequencing batch reactor." Water Science and Technology 30, no. 12 (1994): 161–70. http://dx.doi.org/10.2166/wst.1994.0603.

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Laboratory experiments were conducted to investigate the performance of the anaerobic sequencing batch reactor (ASBR) for digestion of a municipal sludge. The reactors were operated at an HRT of 10 days with an equivalent loading rate of 0.8-1.5 g VS 1−1 d−1 at 35°C. Solids were accumulated rapidly in the ASBR during start-up period. Flotation thickening occurred in the ASBRs, and its efficiency was comparable to that of additional thickening of the completely mixed control reactor. Solids concentrations in the ASBRs were 2.6 times higher than that in the control. The dehydrogenase activity ha

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16

Barnes, S. P., and J. Keller. "Cellulosic waste degradation by rumen-enhanced anaerobic digestion." Water Science and Technology 48, no. 4 (2003): 155–62. http://dx.doi.org/10.2166/wst.2003.0243.

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Anaerobic digestion of lignocellulosic material is carried out effectively in many natural microbial ecosystems including the rumen. A rumen-enhanced anaerobic sequencing batch reactor was used to investigate cellulose degradation to give analysis of overall process stoichiometry and rates of hydrolysis. The reactor achieved VFA production rates of 207-236 mg COD/L/h at a loading rate of 10 g/L/d. Overloading of the reactor resulted in elevated production of propionic acid, and on occasion, the presence of succinic acid. With improvements in mixing and solids wasting, the anaerobic sequencing

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17

Yerkes, D. W., S. Boonyakitsombut, and R. E. Speece. "Antagonism of sodium toxicity by the compatible solute betaine in anaerobic methanogenic systems." Water Science and Technology 36, no. 6-7 (1997): 15–24. http://dx.doi.org/10.2166/wst.1997.0570.

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In this paper, the compatible solute betaine is investigated for its antagonistic effects toward sodium toxicity in anaerobic methanogenic systems. Concentrations of betaine as low as 1 mM are shown to be effective at reducing the toxicity symptoms of high concentrations of sodium in the following anaerobic reactor systems: batch reactors seeded with a Methanosarcina enriched culture and batch reactors seeded with a Methanothrix culture, where the acclimation time or lag time before methane production begins is reduced significantly; CSTRs, where the acetic acid uptake rate increases dramatica

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18

Cao, Xiang Sheng, Xue Zheng Meng, and Yin Zhong Wang. "Conditions Influencing Struvite Precipitation from Anaerobic Sludge Digestion Filtrate in a Batch Reactor." Advanced Materials Research 183-185 (January 2011): 1432–36. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1432.

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Struvite precipitation in sludge dewatering filtrate was achieved in a lab-scale sequencing batch reactor. The influence of the operational conditions on the struvite precipitation process has been studied. These operational conditions include stirring rate of the reactor, reaction time and sedimentation time. Experiments indicated that stirring rate of the reactor within 50 rpm to 250 rpm had no strong influence on the formation of struvite. As reaction time increased, there was a slight positive effect on the removal of Mg2+, NH4+ and PO43-. Suggested reaction time is 40-80 minutes based on

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19

Ng, W. J., S. L. Ong, and J. Y. Hu. "Denitrifying phosphorus removal by anaerobic/anoxic sequencing batch reactor." Water Science and Technology 43, no. 3 (2001): 139–46. http://dx.doi.org/10.2166/wst.2001.0129.

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Denitrifying phosphorus removal was verified in a laboratory anaerobic/anoxic Sequencing Batch Reactor (A/A SBR) for a period of 18 months. The results obtained demonstrated the ability of the anaerobic/anoxic strategy to enrich the growth of denitrifying phosphorus bacteria (DPB) capable of taking up phosphate under anoxic conditions by using nitrate as the electron acceptor. Phosphorus removal efficiency ranging from 40-100% could be attained in an A/A SBR system. Simultaneous anoxic phosphate uptake and biological denitrification under anaerobic/anoxic condition occurred in this system. Bat

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20

Richardson, D. A., E. Andras, and K. J. Kennedy. "Anaerobic Toxicity of Fines in Chemi-Thermomechanical Pulp Wastewaters: A Batch Assay-Reactor Study Comparison." Water Science and Technology 24, no. 3-4 (1991): 103–12. http://dx.doi.org/10.2166/wst.1991.0467.

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Toxicity of chemi-thermomechanical pulping (CTMP) wastewaters was tested in batch assays and in anaerobic sludge blanket reactors. In batch serum bottle tests particulate constituents were responsible for 80-90% of the inhibition of acetoclastic activity, and the soluble (fines-free) fraction accounted for 10-20%. Performance of two 2-stage anaerobic sludge blanket reactor systems was compared, one receiving fines-free (NF) and the other unaltered (F) CTMP waste for 140 days. Both reactors became acclimatized to CTMP and developed a tolerance to resin acid concentrations as high as 300-1500 mg

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21

Pérez-Elvira, S., M. Fdz-Polanco, F. I. Plaza, G. Garralón, and F. Fdz-Polanco. "Ultrasound pre-treatment for anaerobic digestion improvement." Water Science and Technology 60, no. 6 (2009): 1525–32. http://dx.doi.org/10.2166/wst.2009.484.

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Prior research indicates that ultrasounds can be used in batch reactors as pre-treatment before anaerobic digestion, but the specific energy required at laboratory-scale is too high. This work evaluates both the continuous ultrasound device performance (efficiency and solubilisation) and the operation of anaerobic digesters continuously fed with sonicated sludge, and presents energy balance considerations. The results of sludge solubilisation after the sonication treatment indicate that, applying identical specific energy, it is better to increase the power than the residence time. Working wit

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22

Rintala, J., J. L. Sanz Martin, and G. Lettinga. "Thermophilic Anaerobic Treatment of Sulfate-Rich Pulp and Paper Integrate Process Water." Water Science and Technology 24, no. 3-4 (1991): 149–60. http://dx.doi.org/10.2166/wst.1991.0471.

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Anaerobic treatment of sulfate - rich (COD/SO4 ratio 1.4-2.1) clarified Whitewater from a thermomechanical pulping (TMP) process was studied in three laboratory-scale upflow anaerobic sludge blanket (UASB) reactors at 55°C and in batch digesters at 55° and 65°C. Different seed materials were used in the UASB reactors. The highest COD removal efficiency (effluent sulfide stripped) achieved was approximately 65 % in the UASB reactors. About 55 % COD removal efficiency was obtained at a loading rate of about 41 kgCODm−3d−1 in the UASB reactor seeded with thermophilic sludge cultivated with volati

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23

Ribarova, I., J. Topalova, I. Ivanov, D. Kozuharov, R. Dimkov, and C. Cheng. "Anaerobic sequencing batch reactor as initiating stage in complete pentachlorophenol biodegradation." Water Science and Technology 46, no. 1-2 (2002): 565–69. http://dx.doi.org/10.2166/wst.2002.0535.

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Biodegradation of pentachlorophenol (PCP) has been studied in a sequence of two completely mixed reactors. Investigation on the first anaerobic sequencing batch reactor (AnSBR) is discussed in detail in this paper. Key technological and microbiological features were studied: two different types of adaptation process of anaerobic sludge towards PCP detoxication; the influence of the sludge concentration upon the rate of PCP biodegradation; minimum retention time for PCP degradation in dependence on the PCP concentration; modeling of the PCP degradation process; effluent COD and SS concentration

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Wang, X., M. Ji, J. F. Wang, Z. Liu, and Z. Y. Yang. "Anaerobic uptake of phosphate in an anaerobic–aerobic granular sludge sequencing batch reactor." Water Science and Technology 53, no. 9 (2006): 63–70. http://dx.doi.org/10.2166/wst.2006.266.

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An unusual phenomenon of anaerobic phosphate uptake under alternating anaerobic/aerobic condition was observed in a granular sludge sequencing batch reactor, fed with acetate as sole organic substrate. Anaerobic phosphate uptake efficiencies remained at 50–70% as the influent P/COD was increased from 2/100 to 4/100, and results showed that anaerobic uptake of phosphate was correlated with anaerobic absorption of acetate. Excluding the main possibility of chemical phosphate removal, it appeared that phosphate uptake during the anaerobic phase was associated with organisms enriched in the reacto

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Lee, J. G., J. M. Hur, D. Chang, and T. H. Chung. "Performance characterization of anaerobic sequencing batch reactor process for digestion of night soil." Water Science and Technology 43, no. 1 (2001): 27–34. http://dx.doi.org/10.2166/wst.2001.0007.

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Laboratory experiments were conducted to investigate the performance of an anaerobic sequencing batch reactor (ASBR) process for night soil treatment. Performances of the reactors were evaluated at an equivalent hydraulic retention time (HRT) of 10 days with an equivalent loading rate of 2.6 kgVS/m3/d (3.1 kgCOD/m3/day) at 35°C. Digestion of a night soil was possible using the ASBR at an HRT of 10 days in spite of high concentration of ammonia nitrogen and settleable solids. Solids were accumulated rapidly in the ASBRs, and their concentrations were 2.3∼2.4 times higher than that in a complete

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Wun-Jern, Ng. "A sequencing batch anaerobic reactor for treating piggery wastewater." Biological Wastes 28, no. 1 (1989): 39–51. http://dx.doi.org/10.1016/0269-7483(89)90048-7.

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27

Szűcs, B. Rózsáné, G. L. Szántó, M. Simon, and Gy Füleky. "Process performance of dry, batch anaerobic digestion of sewage sludge: methanogenic seed mixtures." Water Science and Technology 66, no. 2 (2012): 445–50. http://dx.doi.org/10.2166/wst.2012.223.

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A dry, batch anaerobic digestion (DBAD) process was tested on two sewage sludge types with different methanogenic seed fractions under laboratory conditions. The aim was to indicate optimal sludge:seed mixing ratios and analyse process performance based on degradation rate and reactor-specific methane production. The attained results were compared with the performance of a liquid-state, laboratory-scale stirred reactor (SR). A mixing ratio of at least 1:1.25 (sludge:seed) yielded processes free from significant inhibitions. Further seeding increments resulted in slightly better performances, b

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de Sousa, J. T., and E. Foresti. "Domestic sewage treatment in an upflow anaerobic sludge blanket - sequencing batch reactor system." Water Science and Technology 33, no. 3 (1996): 73–84. http://dx.doi.org/10.2166/wst.1996.0060.

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Domestic sewage treatment in up-flow anaerobic sludge blanket (UASB) reactors has presented significant results in tropical regions. This reactor configuration has proven to be efficient in removing organic matter and total suspended solids as well as in producing smaller amounts of excess sludge than conventional aerobic reactor. On the other hand, its effluent often requires to be post-treated in order to achieve the emission standards. This paper is concerned with the alternative proposed here for treating domestic sewage in a combined anaerobic-aerobic system composed of an UASB reactor fo

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Latif, Mohamad Adib Syahmi, Fazilah Ariffin, Rudiyanto, et al. "Decolorization of Synthetic Azo Dyes under Anaerobic Condition in A Continuous Stirred Tank Reactor." Journal of Pure and Applied Microbiology 15, no. 2 (2021): 658–66. http://dx.doi.org/10.22207/jpam.15.2.10.

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Biological treatment for textile wastewater always has a limitation in term of time of reaction and uncertainty along the process. This study focused on the decolorization of synthetic azo dyes in batch reactors with controlled thermotolerant anaerobic conditions. Less-volatile digested sludge collected from a palm oil biogas reactor was used as the organic biodegradation agent for azo dyes. Digested sludge contains high amounts of microbes with uncertain species viable for decolorization purposes. Sodium acetate trihydrate (C2H9NaO5) was used as carbon source and mixed with a specific composi

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Kuba, T., G. Smolders, M. C. M. van Loosdrecht, and J. J. Heijnen. "Biological Phosphorus Removal from Wastewater by Anaerobic-Anoxic Sequencing Batch Reactor." Water Science and Technology 27, no. 5-6 (1993): 241–52. http://dx.doi.org/10.2166/wst.1993.0504.

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In this study an anaerobic-anoxic SBR (sequencing batch reactor) was used in order to investigate the possibility of phosphorus removal utilizing nitrate as an electron acceptor, instead of oxygen in biological phosphorus removal processes. The reactor was supplied with synthetic wastewater, in which acetic acid (HAc) and phosphate were added at concentrations of 400 mg-COD/l and 15 mg-P/l. A conventional anaerobic-aerobic SBR was also operated to compare with the anaerobic-anoxic SBR. The objectives of this research are to examine (i) feasibility and stability of the systems, (ii) kinetics an

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Rada, Elena Cristina, Marco Ragazzi, and Vincenzo Torretta. "Laboratory-scale anaerobic sequencing batch reactor for treatment of stillage from fruit distillation." Water Science and Technology 67, no. 5 (2013): 1068–74. http://dx.doi.org/10.2166/wst.2013.611.

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This work describes batch anaerobic digestion tests carried out on stillages, the residue of the distillation process on fruit, in order to contribute to the setting of design parameters for a planned plant. The experimental apparatus was characterized by three reactors, each with a useful volume of 5 L. The different phases of the work carried out were: determining the basic components of the chemical oxygen demand (COD) of the stillages; determining the specific production of biogas; and estimating the rapidly biodegradable COD contained in the stillages. In particular, the main goal of the

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Rusín, Jiří, Kateřina Chamrádová, and Kateřina Kašáková. "Development of the Laboratory Anaerobic Bioreactor for Wet and Dry Digestion Processes." GeoScience Engineering 62, no. 4 (2016): 5–9. http://dx.doi.org/10.1515/gse-2016-0024.

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Abstract This article presents partial results of the laboratory development of an anaerobic bioreactor designed for the physical modelling of (semi)continuous dry or wet anaerobic digestion processes. A horizontal cylindrical tank reactor of 0.4 m3 total capacity has been developed. The reactor allows the continuous stirring of a liquid batch or the intermittent stirring of a solid batch. The bioreactor has been used as a lab-scale digestor in the research project dealing with high-solids (dry) anaerobic co-digestion organic fraction of mixed municipal solid waste. The first experiment was pe

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Serralta, J., L. Borrás, C. Blanco, R. Barat, and A. Seco. "Monitoring pH and electric conductivity in an EBPR sequencing batch reactor." Water Science and Technology 50, no. 10 (2004): 145–52. http://dx.doi.org/10.2166/wst.2004.0630.

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This paper presents laboratory-scale experimentation carried out to study enhanced biological phosphorus removal. Two anaerobic aerobic (A/O) sequencing batch reactors (SBR) have been operated during more than one year to investigate the information provided by monitoring pH and electric conductivity under stationary and transient conditions. Continuous measurements of these parameters allow detecting the end of anaerobic phosphorus release, of aerobic phosphorus uptake and of initial denitrification, as well as incomplete acetic acid uptake. These results suggest the possibility of using pH a

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Zupančič, Gregor D., and A. Jemec. "Anaerobic digestion of tannery waste: Semi-continuous and anaerobic sequencing batch reactor processes." Bioresource Technology 101, no. 1 (2010): 26–33. http://dx.doi.org/10.1016/j.biortech.2009.07.028.

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Sun, Lianpeng, Jianfan Chen, Xiange Wei, Wuzhen Guo, Meishan Lin, and Xiaoyu Yu. "Study of the diversity of microbial communities in a sequencing batch reactor oxic–settling–anaerobic process and its modified process." Canadian Journal of Microbiology 62, no. 5 (2016): 411–21. http://dx.doi.org/10.1139/cjm-2015-0194.

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To further reveal the mechanism of sludge reduction in the oxic–settling–anaerobic (OSA) process, the polymerase chain reaction – denaturing gradient gel electrophoresis protocol was used to study the possible difference in the microbial communities between a sequencing batch reactor (SBR)–OSA process and its modified process, by analyzing the change in the diversity of the microbial communities in each reactor of both systems. The results indicated that the structure of the microbial communities in aerobic reactors of the 2 processes was very different, but the predominant microbial populatio

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Merkel, Wolf, Alexander Schwarz, Sebastian Fritz, Matthias Reuss, and Karlheinz Krauth. "New strategies for estimating kinetic parameters in anaerobic wastewater treatment plants." Water Science and Technology 34, no. 5-6 (1996): 393–401. http://dx.doi.org/10.2166/wst.1996.0575.

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Approaches to mathematical modelling of anaerobic digestion and criteria for reactor design in anaerobic wastewater treatment are based on biological degradation kinetics. Whatever type of kinetics is used, the crucial problem always is reliable parameter estimation. For Monod-type kinetics a concept based on batch and fed-batch techniques is presented, which allows accurate estimation of kinetic parameters Vmax and KS in short-time experiments. Following the method of Optimal Experimental Design, sensitivity analysis is applied to design fed-batch experiments. The paper presents the methodolo

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Kleerebezem, Robbert, Joost Mortier, Look W. Hulshoff Pol, and Gatze Lettinga. "Anaerobic pre-treatment of petrochemical effluents: terephthalic acid wastewater." Water Science and Technology 36, no. 2-3 (1997): 237–48. http://dx.doi.org/10.2166/wst.1997.0528.

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During petrochemical production of purified terephthalic acid (PTA, 1,4-benzene dicarboxylic acid), a large quantity of concentrated effluent is produced. Main polluting compounds in this wastewater are terephthalic acid, acetic acid and benzoic acid in decreasing order of concentration. Acetic acid and benzoic acid are known to be rapidly degraded in high rate anaerobic treatment systems, such as Upflow Anaerobic Sludge Bed (UASB) reactors. Concerning the kinetics of anaerobic mineralization of terephthalic acid, however, no information is available in literuature. Therefore our work focused

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Elaiyaraju, Periyasamy, and Nagarajan Partha. "Biogas Production from Sago (Tapioca) Wastewater Using Anaerobic Batch Reactor." Energy & Environment 23, no. 4 (2012): 631–45. http://dx.doi.org/10.1260/0958-305x.23.4.631.

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In the present study, we have developed a batch reactor setup to monitor the formation of biogas using sago (cassava) wastewater for the first time. The experimental parameters like pH, COD, BOD, volatile solids, have been tested to optimize the production of biogas. The liberated biogas was analyzed and found that, about 65 – 70 % of methane and remaining 20–25 % of CO2. Sago effluent contains large amount of organic material which has a potential to cause water pollution. In order to reduce this problem, an experiment was conducted to remove organic material and biogas recovery from sago eff

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39

Hauck, R., and W. Hegemann. "Anaerobic degradation of 1,2-dichloropropane in batch and continuous culture." Water Science and Technology 41, no. 12 (2000): 7–13. http://dx.doi.org/10.2166/wst.2000.0229.

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Microbial degradation of 1,2-dichloropropane (DCP) was studied in a laboratory scale continuous flow fluidized bed reactor using polyurethane foam cubes as a carrier for the mixed culture. The anaerobic enrichment culture derived from Saale River sediment and was immobilized prior to utilization in the reactor. The DCP degradation performance was monitored by direct gas chromatographic analysis. A variety of different co-substrates were investigated for their ability to support DCP dechlorination during reactor operation. Continuous DCP removal efficiencies over 90% were achieved with a model

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40

Angelidaki, I., L. Toräng, C. M. Waul, and J. E. Schmidt. "Anaerobic bioprocessing of sewage sludge, focusing on degradation of linear alkylbenzene sulfonates (LAS)." Water Science and Technology 49, no. 10 (2004): 115–22. http://dx.doi.org/10.2166/wst.2004.0622.

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Anaerobic degradation of sludge amended with linear alkylbenzene sulfonates (LAS) was tested in a one stage continuous stirred tank reactor (CSTR) and a two stage reactor system consisting of a CSTR as first step and upflow anaerobic sludge bed (UASB) reactor as the second step. Anaerobic removal of LAS was only observed at the second step but not at the first step. Removal of LAS in the UASB reactors was approx. 80% where half was due to absorption and the other half was apparently due to biological removal as shown from the LAS mass balance. At the end of the experiment the reactors were spi

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Oa, S. W., and E. Choi. "Phosphorus removal from nightsoil with sequencing batch reactor (SBR)." Water Science and Technology 36, no. 12 (1997): 55–60. http://dx.doi.org/10.2166/wst.1997.0430.

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Phosphorus removal characteristics are rather complicated in a highly nitrogenous waste like nightsoil under treatment with SBR (sequencing batch reactor). It was found that the increased pH due to denitrification in anaerobic period stimulated chemical precipitation of phosphorus as struvite and hydroxyapatite, and the depressed pH due to nitrification in the aerobic period dissolved the previously formed precipitates. Phosphate accumulating organisms (PAO) worked as in the ordinary BNR (biological nutrient removal) systems regardless of the chemical reactions, but the chemical reactions mask

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42

Buitrón, G., K. M. Martínez, and A. Vargas. "Degradation of acid orange 7 by a controlled anaerobic–aerobic sequencing batch reactor." Water Science and Technology 54, no. 2 (2006): 187–92. http://dx.doi.org/10.2166/wst.2006.503.

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The degradation of a mono azo dye in an automated and controlled anaerobic–aerobic sequencing batch reactor (SBR) is described in this work. The experiments were conducted with a synthetic wastewater containing acid orange 7 as the model compound to degrade and glucose as the co-substrate in a molar relationship 1:40 (substrate/co-substrate). It was possible to control the anaerobic and aerobic stages, using the redox potential (ORP) as the only control variable. The strategy detects an inflection point in the ORP signal, indicating the end of the reaction. The efficiency of removal of total o

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43

Danesh, Shahnaz, and Jan A. Oleszkiewicz. "Use of a new anaerobic-aerobic sequencing batch reactor system to enhance biological phosphorus removal." Water Science and Technology 35, no. 1 (1997): 137–44. http://dx.doi.org/10.2166/wst.1997.0031.

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A two-stage anaerobic-aerobic sequencing batch reactor (SBR) system (PAF-SBR) was developed to enhance biological phosphorus removal in the sequencing batch reactors. The system performance was evaluated against a conventional SBR system in parallel lab-scale reactors at room temperature, using the degritted raw wastewater as the feed. The SRT for the anaerobic SBR which is named PAF (Primary Acid Fermenter) was 12 days, and for both the BNR reactors was 10 days. All reactors were run at 3 cycles per day. A significant difference (P=0.01) was observed between the performances of the two system

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Beristain-Montiel, Lizeth, Jorge Gómez, Oscar Monroy, Flor de Maria Cuervo-López, and Florina Ramírez-Vives. "Biodegradation of 2-chlorophenol (2CP) in an anaerobic sequencing batch reactor (ASBR)." Water Science and Technology 65, no. 10 (2012): 1721–28. http://dx.doi.org/10.2166/wst.2012.683.

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The aim of this study is to contribute to the knowledge about anaerobic digestion of 2-chlorophenol (2CP) in an anaerobic sequencing batch reactor (ASBR). Two reactors were set up (ASBRA and ASBRB). The ASBRA was fed with 2-chlorophenol (28–196 mg 2CP-C/L) and no other exogenous electron donor. The ASBRB was fed with a mixture of 2CP (28–196 mg 2CP-C/L) and phenol (28–196 mg phenol-C/L) as an electron donor. The process evaluation was conducted by three means: first by substrate consumption efficiency (E2CP), second, by biogas yield (Ybiogas-C/2CP-C) and third, by the specific consumption rate

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45

Wanner, J. "Comparison of Biocenoses from Continuous and Sequencing Batch Reactors." Water Science and Technology 25, no. 6 (1992): 239–49. http://dx.doi.org/10.2166/wst.1992.0126.

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Sequencing batch reactors (SBR) are often used for research on nutrient removal systems. A model anaerobic-oxic SBR was compared with a compartmentalized continuous-flow system. The levels of COD, phosphorus, and nitrogen removal in both systems were comparable but the biocenoses differed significantly. The SVI values of activated sludge from the continuous reactor ranged between 100 and 200 ml/g although no significant occurrence of filamentous microorganisms was observed. The sequencing batch reactor produced activated sludge with the SVIs below 100 ml/g and with high settling velocities. Fi

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Bhaumik, S., C. Christodoulatos, G. P. Korfiatis, and B. W. Brodman. "Aerobic and anaerobic biodegradation of nitroglycerin in batch and packed bed bioreactors." Water Science and Technology 36, no. 2-3 (1997): 139–46. http://dx.doi.org/10.2166/wst.1997.0503.

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Glycerol trinitrate (GTN) is a contaminant commonly found in the waste streams of munitions manufacturing and pharmaceutical plants. It is a highly toxic substance harmful to humans and other living organisms. In this study, the bioconversion of GTN was examined under aerobic conditions using mixed bacterial cultures and Phanerochaete chrysosporium, and under strict anaerobiosis using anaerobic digester sludge. Batch reactor experiments indicated that activated sludge, P. chrysosporium, and anaerobic digester sludge can completely denitrate GTN via a mechanism which forms isomeric glycerol din

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47

Chang, Y. C., K. Asanuma, M. Hatsu, and K. Takamizawa. "Removal of tetrachloroethylene in an anaerobic fixed-bed reactor immobilized with Clostridium bifermentans DPH-1." Water Supply 1, no. 2 (2001): 107–14. http://dx.doi.org/10.2166/ws.2001.0027.

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An upflow fixed-bed reactor was evaluated for the removal of tetrachloroethylene (PCE) by a strictly anaerobic, PCE dechlorinating bacterium, Clostridium bifermentans DPH-1 immobilized on sterile ceramic beads. The ceramic beads provide a large surface area for development of cell mass in the column. For kinetic experiments, the conventional first-order reaction kinetics was applied to evaluate the batch and continuous immobilized reactors. Velocity constants (KB and KC) under the batch culture and continuous culture were determined to be 1.9 × 10–2 (mg protein–1h–1) and 1.4 × 10–2 (mg protein

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48

Reis, M. A. M., L. M. D. Gonçalves, and M. J. T. Carrondo. "Sulfate Reduction in Acidogenic Phase Anaerobic Digestion." Water Science and Technology 20, no. 11-12 (1988): 345–51. http://dx.doi.org/10.2166/wst.1988.0305.

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The acidogenic phase of a two-stage anaerobic digestion process using distillery molasses slops effluent with high sulfate concentrations (4.2-5.1 g/l) was investigated. Removal of sulfate was studied at pH 5.8, 6.2, 6.6 and in two different reactors: continuous stirred tank reactor and an upflow fixed film fixed bed reactor. Batch experiments were carried out to obtain the maximum specific growth rates of sulfate reducing bacteria (SRB) at the above mentioned pH values. The biological sulfate removal increased with pH and so did the acetic acid production from the fermentative bacteria and SR

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Johansson, Per, Hans Carlsson, and Karin Jönsson. "Modelling of the anaerobic reactor in a biological phosphate removal process." Water Science and Technology 34, no. 1-2 (1996): 49–55. http://dx.doi.org/10.2166/wst.1996.0355.

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A kinetic model called SIPHOR has been developed for the biological phosphate removal process. The model is based on IAWQ Activated Sludge Model No. 1, and is divided into three sub-models, one anaerobic, one anoxic and one aerobic model. This paper describes the anaerobic model and results from a calibration and verification of the model on batch experiments performed with sludges from a full-scale plant in Helsingborg and a pilot-scale plant in Malmö. Both plants were run as UCT-processes. Anaerobic batch simulations have been used to identify the following constants, P-release rate (kp), fe

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Lourenço, N. D., J. M. Novais, and H. M. Pinheiro. "Reactive textile dye colour removal in a sequencing batch reactor." Water Science and Technology 42, no. 5-6 (2000): 321–28. http://dx.doi.org/10.2166/wst.2000.0531.

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Two sequencing batch reactors (SBRs) with sequenced anaerobic/aerobic phases were used to study biological colour removal from a simulated cotton textile effluent containing an azo reactive dye. One of the reactors was daily fed with Remazol Brilliant Violet 5R dye and the other was used as control. When operating with a sludge retention time (SRT) of 15 days the total COD removal was around 80%, with 30% being removed anaerobically. After 40–50 days of acclimatization the colour removal efficiency reached a maximum, stable value of 90% from a feed dye concentration of 90 mg/l, almost all bein

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