多点循环的厌氧／缺氧并联＋好氧工艺脱氮除磷  

Study on the phosphorus and nitrogen removal by parallel of anaerobic / anoxic + oxic process controlled by multi-point cycle

作　　者：赫俊国[1] 魏文涛[1] 邱微[1,2] 胡惠秩[1] 刘明超[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2013年第12期26-31,共6页Journal of Harbin Institute of Technology

基　　金：“十二五”国家重大科技专项(2012ZX07201002-7;2013ZX07201007-002-002);中国工程院咨询项目:城市水系统植物营养素循环战略与农业可持续发展(2013.1-2014.12);黑龙江省博士后启动金资助项目(LBH-Q12074,LBH-Q12072)

摘　　要：针对传统A2/O工艺脱氮除磷过程存在的营养源竞争、污泥龄等矛盾,提出一种多点循环的厌氧/缺氧并联+好氧工艺.通过分析污泥回流至厌氧段、好氧段的量和磷的释放与吸收的相关关系及其对处理效果的影响,考察工艺在缺氧段的脱氮效果,研究厌氧段与缺氧段的营养源分配及其对处理效能的影响,确定工艺的最佳运行参数,同时利用PCR-DGGE技术分析工艺各段中功能菌群的生理特性.结果表明,在厌氧段污泥回流比为15%、好氧段污泥回流比为30%、硝化液回流比为300%、厌氧/缺氧进水比例为1∶1的条件下,系统COD、氨氮、TN、TP去除率分别为92.27%、97.54%、87.52%、96.66%,脱氮除磷效果优于A2/O工艺,有效地解决了由碳源不足引起的营养物竞争以及各种功能菌群间污泥龄的矛盾等问题.Considering the competition of carbon source and sludge age contradictions of sludge age among the various functional bacteria in traditional A2/O process, parallel of anaerobic/anoxic＋oxic process controlled by multi-point cycle was introduced. The relevant relationships between return sludge ratio of anaerobic/oxic and release/absorption of phosphorus and its impact on the treatment effect were analyzed, the influence of internal recycle ratio on nitrogen removal was also studied. Moreover, the distribution of the nutrients between anaerobic and anoxic with its impact on the treatment effect was researched, then the optimum parameters of the process was finally found. After calculating the solid retention time under the best conditions of process, physiological characteristics of various functional bacteria were investigated by PCR-DGGE and 16SrRNA sequence. The results showed that the optimum parameters of the process as following, the anaerobic sludge recycle ratio was 15%, aerobic sludge recycle ratio was 30%, nitrification liquid recycle ratio was 300%, anaerobic/anoxic ：influent ratio was 1 ： 1. With the optimum parameters, the removal rates of COD and ammonia were 92127% and 97.54%, the removal rates of TN and TP were 87.52% and 96.66%. Nitrogen and phosphorus removal was better than the A2/O process. The parallel of anaerobic/anoxic ＋ oxic process controlled by multi-point cycle could solve the problems of the competition of carbon source and contradictions F of sludge age among the various functional bacteria efficiently.

关 键 词：多点循环 厌氧 缺氧 并联 营养源 生物固体平均停留时间 

分 类 号：TU992.3[建筑科学—市政工程]