【摘要】 目的为了解决一体式膜生物反应器(IMBR)的曝气能耗,同时为探讨气水比对IMBR中溶解氧(DO)和工艺出水效果的影响.方法利用一体式膜生物反应器装置进行试验,研究气水比对DO的影响和DO对COD与NH3-N去除效果的影响.结果试验证明溶解氧变化速率随污泥质量浓度的下降而升高,在高污泥质量浓度下,溶解氧浓度对氨氮的去除有一定影响,并得出了气水比、溶解氧以及污水处理效果之间的最佳工作点.结论在MLSS分别为4 23g/L,4 09g/L,3 70g/L的运行条件下,MBR的最佳运行气水比相应为35∶1,25∶1,17∶1;DO的变化对COD的去除效果并不显著;在高污泥浓度下,DO质量浓度保持在2 63～4 85mg/L之间时,氨氮的去除率随溶解氧浓度的上升而下降,氨氮去除率良好,但DO质量浓度过低时,氨氮去除效果不佳.更多还原

【Abstract】 Aimed to the power problem and the effects of air/water ration on MBR effluent,the optimal operate parameter was found on air/water ratio on DO and the effect of DO on the COD,Ammonia-nitrogen removal rate was examined.The experiment showed that the optimal air/water ratio was 35∶1,25∶1,17∶1 to the optimal corresponding MLSS 4.23,4.09,3.70g/L.And under the condition,DO could satisfy the microorganism metabolism.As the MLSS dropped,the DO change rate was raised.The DO change had little effect to the COD removal.But the experiment demonstrated the DO was the key factor to the Ammonia-nitrogen removal.Under the high MLSS condition,the Ammonia-nitrogen removal rate was high when DO valve was 7.63 to 4.85mg/L.And the Ammonia-nitrogen removal rate descended as the DO value hoisted.When DO valve was low,the Ammonia-nitrogen removal was not good.更多还原