摘要
以城市污水为原水,考察了一种分点进水的改良型A2/O工艺的脱氮除磷效果。试验结果表明,原水按照6∶4的体积比分别进入厌氧池和缺氧池后,增加了缺氧池的碳源浓度,提高了该系统的脱氮效果。当进水中碳氮质量比平均为6.84、硝化液回流比为200%,CODCr、TN、NH3-N和TP的平均质量浓度分别为237.02、36.39、22.99和4.98mg/L时,出水CODCr、TN、NH3-N和TP的平均质量浓度分别为34.29、10.70、0.18和0.46mg/L,去除率分别为85.53%、70.60%、99.22%和90.76%。
Taking municipal sewage as the raw water, the performance of modified step-feed A2/O process on nitrogen and phosphorus removal was investigated. The results of the test showed that, after the raw water had been added into anaerobic tank and anoxic tank side by side with the volume ratio of 6 ： 4, the concentration of carbon source in anoxic tank was increased, and then, the nitrogen removing efficiency of the system was improved. When the average value of influent C/N mass ratio was 6.84, the reflux ratio of nitrification liquor was 200%, the average mass concentration of CODcr, TN, NH3-N and TP in the influent water were 237.02, 36.39, 22.99 and 4.98 mg/L respectively, the corresponding values in the effluent water were 34.29, 10.70, 0.18 and 3.46 mg/L respectively, the removal rates were 85.53%, 70.60%, 99.22% and 90.76% respectively.
出处
《工业用水与废水》
CAS
2013年第2期11-14,共4页
Industrial Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2012ZX07203003)
河北省应用基础研究计划重点基础研究项目(12966738D)
邯郸市科学技术研究与发展计划项目(1213109010G)
关键词
改良型A2/O
污水处理
脱氮除磷
回流比
modified A2/O process
sewage treatment
nitrogen and phosphorus removal
reflux ratio
