复合生物反应器低溶解氧同步脱氮除磷  

Simultaneous Nitrogen and Phosphorous Removal Under Low DO in a Hybrid Biological Reactor

作　　者：王建龙[1] 王淑莹[1] 彭永臻[1] 高永青[1] 孙治荣[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重点实验室,北京100022

出　　处：《环境科学》2008年第3期655-659,共5页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2006AA06Z319);国家自然科学基金项目(50778005);北京市自然科学基金项目(8062006)

摘　　要：利用复合生物反应器(HBR)中同时存在的活性污泥和悬浮生物膜混合生物体系,进行了同步脱氮除磷的试验研究.结果表明,溶解氧浓度和进水COD/TN对系统脱氮除磷效果有重要影响.当曝气量(Qair)控制在0.07 m3/h时,系统的同步脱氮除磷效果较好,最大释磷率(释磷结束时溶液中PO43--P浓度与初始PO43--P浓度百分比)为249%,TN平均去除率为80.0%,PO43--P去除率为92.2%.曝气量升高或降低,TN、PO43--P去除率均降低.随着COD/TN的升高,系统TN、PO43--P去除率也逐渐升高,COD/TN从3.2升高至10.5,系统TN平均去除率从70.3%升高至84.9%,PO43--P平均去除率从82.2%高至96.0%.整个试验过程中污泥体积指数(SVI)均小于90 mL/g,污泥的沉降性能良好.实验采用复合反应器进水后未经过传统脱氮、除磷理论认为所必须的缺氧、厌氧段而直接曝气,仍然取得较高的TN、PO43--P去除率.Study was conducted by use of the mixed organism of activated sludge and suspended biofilm coexisting in a hybrid biological reactor （HBR） system for simultaneous nitrogen and phosphorous removal. The experimental results showed that, DO and COD/TN were the main factors affected the effluent. The maximum phosphorous releasing rate （the rate of PO4^3- -P concentration at releasing end to the initial PO4^3- -P concentration） was 249%, TN removal efficiency was 80.0%, and PO4^3- -P removal efficiency was 92.2% by controlling the aeration rate （Qair） at 0.07 m^3/h. TN and PO4^3--P removal efficiency will be decreased, whenever aeration rate increasing or decreasing. With the increasing of COD/TN, the TN and PO4^3- -P removal efficiency was increased. TN removal efficiency was increased from 70.3% to 84.9%, and pO4^3- -P removal efficiency was increased from 82.2% to 96.0%, when COD/TN was increased from 3.2 to 10.5. The SVI of the activated sludge was less than 90 mL/g during the experiments. It was found during the research process that high phosphorus and nitrogen removal efficiency can be simultaneous achieved without anaerobic and anoxic phase, which was conventionally considered as a key phase for phosphorus and nitrogen removal.

关 键 词：复合生物反应器 脱氮 除磷 溶解氧 

分 类 号：X703.1[环境科学与工程—环境工程]