三段A/O工艺处理发制品产业集聚区综合废水

利用三段A/O工艺作为发制品产业集聚区综合废水生物处理单元，探讨了不同进水流量分配比和污泥回流比下COD、TN、PO₄^3--P的去除性能和微生物群落特征.结果表明，在进水流量分配比60%：25%：15%、污泥回流比75%、缺氧区与好氧区容积比1：1、SRT 20d、HRT 16h条件下，三段A/O工艺处理综合废水后出水TN平均浓度14.85mg/L，COD浓度低于40m/L；此时PO₄^3--P去除率达到最大值，为56.21%.参与处理综合废水的主要门水平微生物Proteobacteria和Bacteroidetes的相对丰度是45.63%~60.13%和16.65%~30.55%.Denitratisoma、Thauera、uncultured-f-Saprospiraceae和Sulfuritalea等优势菌属相对丰度的增加，是三段A/O工艺TN去除率随第一分段进水流量分配比增大或污泥回流比降低而提高的本质体现.

Utilizing three step feed A/O process to treate comprehensive wastewater from hair product production cluster area

A three step feed A/O process was utilized as a secondary biological treatment unit to treat comprehensive wastewater from hair product production cluster area. The removals of chemical oxygen demand (COD), TN, PO₄^3--P and the features of microbial communities were investigated at different inflow distribution and sludge return. With volume distribution ratio of anoxic and oxic zone 1:1, solid residence time (SRT) 20d, hydraulic retention time (HRT) 16h, inflow distribution and sludge return were 60%:25%:15% and 75%, average TN and COD concentrations were 14.85mg/L and less than 40mg/L, respectivekly, in effluents from the three step feed A/O process. At the same time, removal efficiency of PO₄^3--P reached the maximum value of 56.21%. Relative abundances of Proteobacteria and Bacteroidetes, the dominating phyla for treating comprehensive wastewater, were 45.63%~60.13% and 16.65%~30.55%. The increasing relative abundances of Denitratisoma, Thauera, uncultured -f -Saprospiraceae, Sulfuritalea, et al. was the essential embodiment that removal efficiency of TN increased with the increase of inflow distribution in the first step or the decrease of sludge return.