| 复合生物反应器低溶解氧同步脱氮除磷 |
| 摘要点击 1777 全文点击 1496 投稿时间：2007-03-11 修订日期：2007-04-29 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 复合生物反应器 脱氮 除磷 溶解氧 |
| 英文关键词 hybrid biological reactor nitrogen removal: phosphorous removal DO |
|
| 中文摘要 |
| 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PO3-4-P浓度与初始PO3-4-P浓度百分比)为249%，TN平均去除率为80.0%，PO3-4-P去除率为92.2%.曝气量升高或降低，TN、PO3-4-P去除率均降低.随着COD/TN的升高，系统TN、PO3-4-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%，PO3-4-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、PO3-4-P去除率. |
| 英文摘要 |
| 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 PO3-4-P concentration at releasing end to the initial PO3-4-P concentration) was 249%, TN removal efficiency was 80.0%, and PO3-4-P removal efficiency was 92.2% by controlling the aeration rate (Qair) at 0.07 m3/h. TN and PO3-4-P removal efficiency will be decreased, whenever aeration rate increasing or decreasing. With the increasing of COD/TN, the TN and PO3-4-P removal efficiency was increased. TN removal efficiency was increased from 70.3% to 84.9%, and PO3-4-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. |
|
|
|
