【摘要】 针对传统A²/O工艺对污水同时脱氮除磷效果不佳的问题，以低C/N实际生活污水为研究对象，提出一种“旁路补碳”生物脱氮除磷新工艺。通过试验研究，考察了在稳态条件下缺氧池A₂与厌氧池A₃的不同水量分配比例（分流比）对系统中有机物、氮、磷的去除影响以及对内碳源PHA转化的影响。结果表明：在平均进水C/N比为6.4时，分流比7∶3为最佳运行条件，此时“旁路补碳”新工艺出水中COD、NH₄⁺-N、TN、TP的平均质量浓度分别为31.15 mg/L、4.17 mg/L、13.69 mg/L、0.35 mg/L，平均去除率分别为92.16%、91.19%、78.07%、92.08%；与A²/O工艺相比好氧池内可利用的PHA含量提高了12.11%,TP的去除率由87.91%提高至92.08%。更多还原

【Abstract】 In view of the poor effect of traditional A²/O process on simultaneous removal of nitrogen and phosphorus from sewage,taking low-C/N real domestic sewage as the research object,a new“bypass carbon supplement”biological phosphorus removal process is proposed.Through experimental research,the effect of the different water distribution ratios （split ratio） of anoxic tank A₂ and anaerobic tank A₃ on the removal of organic matter,nitrogen and phosphorus in the system and the effect on the conversion of internal carbon PHA under steady-state conditions were investigated.The results are as fallows:under the condition of an average influent C/N ratio of 6.4,the split ratio of 7∶3 is the best operating condition.At this time,the average mass concentrations of COD,NH₄⁺-N,TN,and TP in the effluent of the new"bypass carbon supplement"process are 31.15 mg/L,4.17 mg/L,13.69 mg/L,0.35 mg/L respectively,the average removal rate is 92.16%,91.19%,78.07%,92.08%respectively;compared with the A²/O process,the available PHA content in the aerobic tank has increased by 12.11%,the TP removal rate has been increased from 87.91%to 92.08%.更多还原