Performance of Opposite Folded Plate Anaerobic Reactor in Treatment of Low Concentration Sewage
Integrated the theory of mass-transfer and staged multi-phase anaerobic （SMPA）, a opposite folded plate anaerobic reactor (OFPAR) with elastic packings in every compartment was applied to treat low concentration sewage (average COD concentration of 500mg/L) for 16 months. The bioreactor operated at different hydraulic retention times (HRTs), and the COD removal efficiencies found in trials were 93.1％, 88.9％, 72.3％ and 63.3％ at a HRT of, respectively, 10h, 8h, 6h and 4h (bioreactor must run at least 15d for each HRT) when the system temperature was controlled at 25±1℃. The results indicated that the optimal HRT was 8～10h. The bioreactor operated at the recycle ratio of 0％, 100％, 150％, 200％ and 300％ (reactor must run at least one week for each recycle ratio) and the average COD removal efficiencies, respectively, were 88.01％, 90.38％, 95.8％, 85.51％ and 77.98％ at a HRT of 8h. The results indicated that the optimal recycle ratio for system was 150％. In order to discuss the feasibility of application this OFPAR to treat low concentration at low temperature in north China, the bioreactor was designed to operate at different temperature of 25℃, 20℃, 15℃ and 10℃ (reactor must run at least three week for each temperature) at a HRT of 10h, and the average COD removal efficiencies, respectively, were 94.2％, 90.2％, 83.4％ and 75.8％. The results indicated that the bioreactor could be operated preferably even at psychrophilic temperature of 10℃ and the feasibility of application the OFPAR to treat low concentration sewage in north China is affirmative. The high organic removal efficiency of this anaerobic reactor in treatment of low concentration sewage at low temperature was owed to higher mass-transfer efficiency and SMPA of OFPAR.
low concentration sewage opposite folded plate anaerobic reactor (OFPAR) mass-transfer theory elastic packings
YE Changbing HAN Xiangkui AI Shengshu BI Dong ZHUANG Jinpeng
College of Environmental and Natural Resources, Jilin University, Changchun 130026, Jilin, China;Dep School of Municipal and Enviromental Engineering, Jilin Architectural and Civil Engineering Institut
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）