复合生物反应器的同步硝化反硝化研究  

Study on Nitrogen Removal by Simultaneous Nitrification and Denitrification in Hybrid Biological Reactor

作　　者：王建龙[1] 王淑莹[1] 袁志国[2] 高永青[1] 高春娣[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100022 [2]昆士兰大学高级废水管理中心

出　　处：《中国给水排水》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)

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1 000 mg/L提高至6 000 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 1 000 to 6 000mg/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.

关 键 词：复合生物反应器 同步硝化反硝化 溶解氧 污泥浓度 

分 类 号：X703[环境科学与工程—环境工程]