运行方式对厌氧区碳源分流多级A/O工艺处理效果的影响  

The influence of operation mode on removal efficiency of step-feed A/O system with flow distribution of carbon source from anaerobic zone

作　　者：沈翼军[1,2] 吴瑒 杨殿海[2] 张浩[2] 张新喜[1] 

机构地区：[1]安徽工业大学建筑工程学院,生物膜法水质净化及利用技术教育部工程研究中心,安徽马鞍山243002 [2]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境污染与防治》2016年第11期25-30,37,共7页Environmental Pollution & Control

基　　金：国家“十二五”科技重大专项(No.2011ZX07303-002);安徽省高校青年教师资助计划项目(No.2007jq1033);安徽省高校省级自然科学研究项目(No.KJ2010A049)

摘　　要：采用厌氧区碳源分流多级A/O工艺进行了低碳、高氮磷市政污水的中试试验,研究了运行方式对该工艺去除有机物以及脱氮除磷的影响。通过7个阶段的连续运行比较,得到系统最优流量分配比(体积比)为厌氧区分流75%∶25%,最终出水COD、氨氮、TN、TP质量浓度分别为20.8、0.64、14.2、0.89mg/L,基本满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。流量分配比对去除COD、氨氮基本没有影响,对去除TN、TP的影响较大。通过对内回流位置研究发现,内回流位置在消氧区更有利于处理效果的提升。通过对进水负荷研究发现,COD和氨氮污泥负荷还有很大的提升空间,控制TN污泥负荷为0.040kg/(kg·d)时对TN的处理效果较好。Step-feed A/O system with flow distribution of carbon source from anaerobic zone was applied to treat sewage with low carbon and high nitrogen and phosphorus. The study was carried out to investigate the influence of operation mode on removal of organic matter,nitrogen and phosphorus. After seven stages of operation,the optimal flow distribution ratio obtained was 75% ： 25% from anaerobic zone. The final concentrations of COD,ammonia nitrogen, TN, TP in effluent were 20.8,0.64,14.2 and 0.89 mg/L,respectively,almost conformed to Grade A of the first level standard of “Discharging standard of pollutants for municipal wastewater treatment plant”（GB 18918-2002）. Flow distribution ratio had little influence on COD and ammonia nitrogen removal, while it had great influence on TN and TP removal. The research of internal reflux position showed that the internal reflux position in eliminating oxygen zone had better treatment efficiency. The research of influent load？COD and ammonia nitrogen load had much room to improve. When TN load was controlled to 0.040 kg/（kg ·d） , better TN removal efficiency could be gotten.

关 键 词：厌氧区 分流 多级A/O 脱氮除磷 分配比 

分 类 号：X703[环境科学与工程—环境工程]