改良型水解酸化池运行效果与微生物菌群分析

Analysis on Operation Results by Modified Hydrolytic Acidification Process and Microbial Community

通过在原水解酸化池中安装弹性填料,将CASS池剩余污泥回流至水解酸化池等改良措施,本研究采用改良型水解酸化池-CASS-絮凝沉淀组合工艺处理含高比例工业废水的污水。运行结果表明,改良型水解酸化池显著提高了废水的可生化性,B/C能稳定保持在0.3以上,系统出水COD稳定达到国家一级A排放标准。Illumina MiSeq测序结果表明,变形菌门(Proteobacteria)和拟杆菌门(Bacteroidetes)是水解池污泥中的主要优势菌群,占比超过50%。在不同微生物种群的共同作用下,废水中复杂的有机污染物得以有效降解。

By installing elastic fillers in the original hydrolysis acidification tank,and returning the remaining sludge from the CASS tank to the hydrolytic acidification process,this study adopted an modified hydrolytic acidification process-CASSflocculation and sedimentation combined process to treat wastewater containing a high proportion of industrial wastewater.The operation results showed that the biodegradability of wastewater was significantly improved by the modified hydrolytic acidification process.The B/C ratio could reach above 0.3 steadily,the COD in effluent of the system could meet the firstclass A discharge standard.Results of Illumina MiSeq sequencing demonstrated that Proteobacteria and Bacteroidetes were highly enriched in the sludge of hydrolytic acidification with abundance of more than 50%at the phylum levels.Under the combined action of different microbial populations,complex organic pollutants in wastewater can be effectively degraded.