摘要
以实际生活污水为处理对象,利用有效容积为12 L的间歇式复合生物反应器(填料填充率:30%,运行方式:瞬间进水—曝气660 min—沉淀40 min—排水20 min),研究了DO、COD/TN值、MLSS对同步硝化反硝化的影响。结果表明:当溶解氧浓度从4 mg/L降到0.5 mg/L时,对总氮的去除率从48.9%升至74.2%;当污泥浓度从1000 mg/L提高至6000 mg/L时,对总氮的去除率从63.4%升至81.6%;当COD/TN值从3升至15.6时,对总氮的去除率从59%提高至82.5%,但当COD/TN值>8后,对总氮的去除率提高得并不明显。整个试验过程中SVI<105mL/g,污泥的沉降性能良好。复合生物反应器易于实现稳定的同步硝化反硝化,并可通过控制DO、MLSS等参数来有效提高对总氮的去除率。
Taking actual domestic wastewater as influent substrate,the effect of DO,COD/TN and MISS on simultaneous nitrification and denitrification(SND)was investigated in intermittent hybrid biological reactor(HBR)with available capacity of 12 L,filling rate of 30%and operation mode of instantaneous water inflow,aeration(660 min),sedimentation(40 min)and drainage(20 min).The results show that when DO concentration decreases from 4 to 0.5 mg/L,the TN removal efficiency increases from 48.9%to 74.2%.With the increase of MLSS from 1000 to 6000mg/L,TN removal efficiency increases from 63.4%to 81.6%.TN removal efficiency increases from 59%to 82.5%with the increase of COD/TN from 3 to 15.6.However,when the COD/TN ratio is higher than 8,the TN removal efficiency has no significant increase.SVI of activated sludge is below 105 mL/g throughout the experiment and favorable settleability is shown.HBR is apt to achieve stable SND,and TN removal can be enhancedthrough controlling DO and MLSS.
作者
王建龙
王淑莹
袁志国
高永青
高春娣
WANG Jian-ong;WANG Shu-ying;YUAN Zhi-guo;GAO Yong-qing;GAO Chun-di(Beijing Key Laboratory of Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100022,China;Advanced Wastewater Management Centre,The University of Queensland,Australia)
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第9期32-36,共5页
China Water & Wastewater
基金
北京市科委"863计划"配套项目(Z0005186040421)
北京市科委国际合作项目
北京市属市管高等学校人才强教"创新团队"项目
北京市自然科学基金资助项目(8022006)
