Biodegradation of mixture of VOCs in a biofilter(Using a zeolite medium biofilter to remove organic
Biodegradation of mixture of VOCs in a biofilter
Biodegradation of mixture of VOCs in a biofilter
Abstract：Volatile organic compounds(VOC' s) in air have become major concem in recent years. Biodegradation of a mixture of ethanol and methanol vapor was evaluated in a laboratory biofilter with a bed of compost and polystyrene particles using an acclimated mixed culture. The continuous performance of the biofilter was studied with different proportion of ethanol and methanol at different initial concentration and flow rates. The result showed significant removal for both ethanol and methanol, which were composition dependent.The presence of either compound in the mixture inhibited the biodegradation of the other.作 者：D.Arulneyam T.Swaminathan 作者单位：Biotechnology Research Centre, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai 600 036, India 期 刊：环境科学学报(英文版) ISTICSCI Journal：JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)：2004, 16(1) 分类号：X701.7 Keywords：biofilter methanol ethanol elimination capacity upset loading VOCs biodegradation
Using a zeolite medium biofilter to remove organic pollutant and ammonia simultaneously
Using a zeolite medium biofilter to remove organic pollutant and ammonia simultaneously
Abstract：A pilot scale zeolite medium biological aerated filter(ZBAF) was designed and used to treat municipal wastewater. It showed that ZBAF could simultaneously remove chemical oxygen demand(COD), ammonia-N and turbidity to satisfied degree at a hydraulic retention time(HRT) of 0.95 h. Their average removal efficiencies were 73.9%, 88.4% and 96.2% with the corresponding average effluent concentrations of 43.4 mg/L, 3.5 mg/L and 3.7 NTU, respectively. These effluent items met with the water quality standard of the treated water reused for cooling water. The COD removal volumetric loading rate increased proportionally with its applied volumetric loading rate removal efficiency in the future.作 者：TIAN Wen-hua WEN Xiang-hua QIAN Yi 作者单位：ESPC State Key Joint Laboratory, Department of Environment Science and Engineering, Tsinghua University, Beijing 100084, China 期 刊：环境科学学报(英文版) ISTICSCI Journal：JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)：2004, 16(1) 分类号：X703 Keywords：ammonia-N removal biological aerated filter hydraulic retention time natural zeolite volumetric loading rate