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  作者單位：Biotechnology Research Centre, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai 600 036, India 期 刊：環(huán)境科學(xué)學(xué)報(英文版)  ISTICSCI  Journal：JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)：2004, 16(1) 分類(lèi)號：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  作者單位：ESPC State Key Joint Laboratory, Department of Environment Science and Engineering, Tsinghua University, Beijing 100084, China 期 刊：環(huán)境科學(xué)學(xué)報(英文版)  ISTICSCI  Journal：JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)：2004, 16(1) 分類(lèi)號：X703 Keywords：ammonia-N removal    biological aerated filter    hydraulic retention time    natural zeolite    volumetric loading rate