倒置A^2/O池容比对猪场消化液脱氮除磷的影响  

Effect of Tank Volume Ratio on the Removal of Nitrogen and Phosphorus in Digested Piggery Wastewater by Reversed A^2/O Process

作　　者：沈阳 王电站[1] 周立祥[1] SHEN Yang;WANG Dianzhan;Zhou Lixiang(College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China)

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095

出　　处：《水处理技术》2020年第3期119-123,共5页Technology of Water Treatment

基　　金：江苏省农业科技自主创新资金项目(CX(17)2024);江苏省科研与实践创新计划项目(SJCX17-0186).

摘　　要：利用倒置A2/O工艺处理猪场废水厌氧消化液,研究了该工艺缺氧、厌氧、好氧池容比对低C/N猪场废水厌氧消化液脱氮除磷的影响。在总水力停留时间相同的前提下,实验设定工况1~工况4缺氧、厌氧、好氧池容比分别为(3:2:4)、(3:1:4)、(1:3:4)和(1:1:4)。结果表明,在处理低C/N猪场废水厌氧消化液时,池容比对厌氧消化液中COD、NH4+-N、TN和TP等污染物去除效果差异明显。在好氧段充分硝化的条件下,选择合适缺氧、厌氧池容比,能够提高倒置A2/O工艺系统对低C/N厌氧消化液的脱氮除磷效率。工况1对污染物总体去除效果最好,该运行工况下COD、NH4+-N、TN和TP的平均去除率分别达到了88.75%、80.12%、65.33%和62.53%。Digested piggery wastewater was treated by reversed A2/O process,and the effect of anoxic/anaerobic/aerobic tank volume ratio on the removal of nitrogen and phosphorus in digested piggery wastewater with low carbon/nitrogen(C/N)was studied.Under the condition of the same total hydraulic retention time(HRT),four anoxic/anaerobic/aerobic tank volume ratios,namely 3:2:4,3:1:4,1:3:4 and 1:1:4,were tested.The results showed that the removal effect of tank volume ratio on COD,NH3-N,TN and TP in digested piggery wastewater with low C/N was significantly different.To improve the removal efficiency of nitrogen and phosphorus in digested piggery wastewater with low C/N by the reversed A2/O process,it is necessary to choose suitable operating conditions of anaerobic/anaerobic tank volume ratio to ensure the sufficient nitrification of aerobic section.Under the operating condition 1,the average removal rates of COD,NH3-N,TN,and TP reached 88.75%,80.12%,65.33%and 62.53%,respectively.

关 键 词：池容比 低C/N厌氧消化液 倒置A2/O工艺 脱氮除磷 

分 类 号：X713[环境科学与工程—环境工程]