Removal of residual organic matters from secondary effluent by a submerged membrane bioreactor
The redamafion of municipal wastewater as an alternative water source for non-potable use is encouraged in China.Howeveer the residual organic matters in the secondary effluent need to be further removed prior to reuse.In this paper,the removal of residuaI organic matters from the bio-treated wastewater was experimentally examined by submerged MBR system for 30 days.The MLSS concentration in the reactor could not be maintained at a high level due to low SCOD concentration about 40.0～56.2mg/L in the influent.Under the experimental conditions.the MLSS concentration in the reactor was about 820mg/L when the system was in a steadY period.The total removal efficiencies of SCOD in MBR system varied in the range of 12.7％-14.8％.However,the membrane played an important role in removing SCOD contained in the water phase and 33.9％of the average SCOD removal was acquired.The mechanisms of membrane removing organic matters are expected to include three aspects:screening,adsorption,and deposition-adsorption.Among them,deposition-adsorption should have played a significant role in removing soluble organic matters.which Can be identified indirectly by the stergoscan photographs of membrane surface before and after use.
membrane bioreactor residual organic matters secondary emuent treated municipalwastewater WaSteWater reuse
Li FENG Liqiu ZHANG Dezhi SUN Renzheng GU
College of Environmental Science & Engineering,Beijing Forestry UniversitY,Beijing,100083,CHINA College of Environmental Science & Engineering,Beijing Forestry UniversitY,Beijing,100083,CHINA;Scho School of Mtmicipal and Environmental Engineering,Harbin Institute of Technology,Harbin,150090,CHINA
国际会议
西安
英文
551-558
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）