活性污泥外循环SBR系统的生物除磷能力  

Biological Phosphorus Removal Capability in SBR System Using External Recycle of Activated Sludge

作　　者：吉芳英[1] 罗固源[1] 杨琴[1] 罗宁[1] 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045

出　　处：《中国给水排水》2002年第5期1-5,共5页China Water & Wastewater

基　　金：重庆市科委 (6 912 );建设部科研攻关 (0 1- 2 - 0 33)项目

摘　　要：通过试验发现生物系统用排除剩余污泥方式除磷的能力有限 ,当进水TP≥ 5mg/L时要保证出水TP≤ 0 .5mg/L是困难的。采用活性污泥外循环方式对释磷的污泥进行回流 ,通过提高SBR系统污泥浓度的方式来提高除磷能力的试验表明 :当MLSS =5 g/L、循环污泥量 =1/ 8系统污泥总量时 ,在进水TP≤ 11mg/L、TN =4 5mg/L的情况下仍能保证出水总磷达到一级排放标准 ,而且该系统出水NH3-N≤ 3.6mg/L ,对总氮去除率≥ 86 % 。It was found through test that there is limited capability for phosphorus removal by means of excess sludge wastage in biological system, and it is difficult for effluent to achieve TP ≤0.5 mg/L in the case of influent of TP ≥5 mg/L. A test was made in which the phosphorus-released sludge was returned by means of external recycle of activated sludge and phosphorus removal capability was improved by increasing sludge concentration in SBR system. The results show that when MLSS is 5 mg/L , and recycled sludge quantity is 1/8 of total sludge amount in the system with TP ≤11 mg/L and TN = 45 mg/L in influent, total phosphorus in effluent can certainly reach the grade 1 of integrated wastewater discharge standard with NH 3-N≤3.6 mg/L and TN removal rate ≥86% in effluent, and thus obtaining the optimal result in simultaneous removal of phosphorus and nitrogen.

关 键 词：生物除磷 活性污泥 污泥外循环 SBR系统 除磷 脱氢 

分 类 号：X703[环境科学与工程—环境工程]