多溴联苯醚对低碳氮废水生物处理的影响探究  

Effect of Polybrominated Diphenyl Ether on Biological Treatment of Low Carbon Nitrogen Wastewater

作　　者：郭欢 赵月琴 徐平平[2] GUO Huan;ZHAO Yueqin;XU Pingping(School of Equipment Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 0300001,China;School of Building Equipment Engineering,Zhejiang Construction Vocational and Technical College,Hangzhou 311231,China)

机构地区：[1]山西工程科技职业大学设备工程学院,山西晋中030000 [2]浙江建设职业技术学院建筑设备工程学院,浙江杭州311231

出　　处：《水处理技术》2023年第6期112-117,共6页Technology of Water Treatment

摘　　要：为研究新兴污染物多溴联苯醚(PBDEs)对废水生物处理过程的影响。构建了序批式反应器(SBR),通过改变进水PBDEs的暴露浓度考察了其对SBR工艺处理低C/N废水过程中污染物及营养盐去除和污泥特征的影响,采用高通量测序技术分析了优势群落变化特征,以期从工艺运行工况及微生物群落特征角度解析PBDEs对生物脱氮除磷的影响机制。结果表明,低剂量PBDEs对SBR去除污染物及污泥特征影响不明显,而高剂量PBDEs(超过3.0 mg/L)降低了污染物的去除,改变了污泥特征及微生物群落结构。9.0 mg/L PBDEs导致出水COD提高至28.6~35.2 mg/L,对应去除效率下降至81.3%~84.9%,总氮和溶解性磷酸盐去除效率下降至61.3%~64.2%和79.5%~82.3%,污泥浓度下降至3512~3649 mg/L,但提高了污泥胞外聚合物(EPS)含量至91.3~96.5 mg/g。PBDEs能影响微生物群落结构和关键酶活性。高浓度PBDEs降低Bacteroidetes和Nitrospirae的相对丰度至9.1%和8.8%。研究结果丰富了新污染物PBDEs的环境行为,并为城镇低C/N废水的生物处理提供一定理论依据。To study the role of new pollutants polybrominated diphenyl ethers(PBDEs)in wastewater biological treatment process.A sequencing batch reactor was constructed,and the influence of PBDEs on the removal of pollutants,nutrients and sludge characteristics in the SBR process with the low C/N wastewater was investigated by changing the exposure concentration of influent PBDEs.The change characteristics of dominant communities were used by high-throughput sequencing technology to analyze the influence mechanism of PBDEs on biological nitrogen and phosphorus removal from the perspective of process operation conditions and microbial community characteristics.The results showed that the low-dose PBDEs had no obvious effect on the removal of pollutants and sludge characteristics by SBR.In contrast,the high-dose PBDEs(more than 3.0 mg/L)reduced the removal of pollutants by SBR,and changed the sludge characteristics and microbial community structure.The 9.0 mg/L PBDEs increased the effluent COD to 28.6~35.2 mg/L,corresponding with the removal efficiency decreased to 81.3%~84.9%.The total nitrogen and dissolved phosphate removal efficiency decreased to 61.3%~64.2%and 79.5%~82.3%,and the sludge concentration decreased to 3512~3649 mg/L.But the extracellular polymer sludge(EPS)content increased to 91.3~96.5 mg/g.The PBDEs can affect the microbial community structure and activity of the critical enzyme.The high PBDE concentrations reduced the relative abundance of Bacteroidetes and Nitrospirae to 9.1%and 8.8%.The research results enriched the environmental behavior of new pollutants PBDEs and provided a theoretical basis for the biological treatment of urban low C/N wastewater.

关 键 词：多溴联苯醚 低C/N 脱氮 微生物群落 

分 类 号：X703.1[环境科学与工程—环境工程]