Activated sludge
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This work demonstrated the potential of US for mitigating membrane fouling. However, the integration of the US transducers within the membrane system will be a major challenge for the application of US in membrane cleaning. It is more appropriate that US is used as pre-treatment to the membrane system, the transducers can be placed prior to the coagulant feed line. Further work on the determination of the detailed mechanisms associated with enhancing coagulation would enable optimisation of the system with regard to process, cost and energy efficiency.
108p runthenight05 01-03-2023 17 3 Download
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Anionic and non-ionic surfactants have been detected in the influents to and effluents from wastewater treatment plants (WWTPs). Linear alkylbenzene sulphonates (LAS) and alkylphenol ethoxylates (APEO) are the most frequently detected anionic and non-ionic surfactants in urban wastewater. The aim of this study was to assess the effect of the presence of anionic and non-ionic surfactants in the influent to WWTPs on activated sludge processes.
111p runthenight05 01-03-2023 8 3 Download
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The aim of this project is to provide a summary of the current knowledge on energy recovery options from wastewater treatment plants sludge and/or biosolids. This covers technologies as well as data from case studies and research experimental results. The focus of the study is the ATP. The project methodology comprised two stages. The first stage involved a review of the current literature.
166p runthenight07 01-03-2023 9 3 Download
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The primary objectives of this study were to: Investigate the fouling potential, and characterise the organic components of the membrane foulant layers, of clarified activated sludge and lagoon effluent obtained from the WTP; Investigate the fouling propensities of EOM and AOM derived from a blue-green algal culture as it passed through the growth cycle, ie., for which the cells had not been subject to physical disruption; Determine any difference in the fouling propensity of EOM and AOM and relate it to organic composition.
99p runthenight07 01-03-2023 3 3 Download
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Municipal wastewater treatment plants generally utilise biological activated sludge processes to remove organic compounds and nitrogen. The biological nitrogen removal (BNR) occurs in two steps, nitrification (ammonium removal) and denitrification (nitrates removal). This study focused on a medium-sized wastewater treatment plant (WTP) which experienced poor nitrification for years, mainly when the weather temperature drops.
125p runthenight07 01-03-2023 10 3 Download
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This research aimed to study the effect of salt (NaCl) concentration on the treatment efficiency of seafood processing wastewater by the use of a laboratory-scale bioreactor, which is operated in anaerobic combining aerobic system with concentration salt different from 0- 5%.
10p tocectocec 25-05-2020 13 2 Download
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Recovering useful hydrocarbons from sewage sludge using zirconia-supporting iron oxide catalysts was investigated. Zirconia has activity for decomposing water molecules to generate active oxygen and hydrogen species.
6p tuananhhumg 04-11-2013 37 2 Download
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Pyrolysis of activated sewage sludge was investigated under inert conditions in a fluidised-bed to study the effects of temperature and gas residence time on the product distribution and composition with an aim to maximise the oil yield.
8p tuananhhumg 04-11-2013 77 5 Download
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Pyrolysis to produce bio-oil from sewage sludge is a promising way, to not only improve the economical value, but also to reduce pollutants associated with sludge. The aim of this study was to evaluate the production of oil from primary, waste activated and digested sludges.
8p tuananhhumg 04-11-2013 59 2 Download
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Hệ thống xử lý nước thải của Bệnh viện đa khoa Đồng Tháp có công suất 250 m3/ngày với bể sinh học hiếu khí Aerotank được cải tạo thành bể sinh học tiếp xúc hiếu khí Activated Sludge combined with Biological Contactor- ASBC do không có khả năng xử lý nước thải đạt tiêu chuẩn, đặc biệt là các chỉ tiêu tổng Nitơ. Sau khi được cải tạo, HTXL với bể ASBC thể hiện hiệu quả xử lý cao hơn hẳn: 87,8% đối với COD, 71,2% đối với tổng N, 83,6% đối với tổng P, 99,98% đối với Coliforms. Nước thải đầu ra đạt tiêu...
7p thoiaotrang290 10-05-2011 441 150 Download
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Biodegradation efficiency enhanced 10%~30% Short Hydraulic Residence Time (HRT) Long Sludge Residence Time (SRT) Activated sludge increase by 2~3 times No secondary settling and disinfecting tank required Automatic control operation is possible Better control of biological activity Quality Effluent that is free of bacteria and pathogens Smaller plant size Higher organic loading rates
9p phuongltht 06-04-2011 163 24 Download