邻苯二甲酸二乙酯对厌氧/好氧/缺氧工艺脱氮除磷的影响  

Effect of Diethyl Phthalate on Nitrogen and Phosphorus Removal by Anaerobic/Aerobic/Anoxic Process

作　　者：王宏涛 程梦然 雷恒[1,2] 刘金平 李欢 WANG Hongtao;CHENG Mengran;LEI Heng;LIU Jinping;LI Huan(Yellow River Conservancy Technical Institute,475004;Henan Engineering Research Center of Prject Operation and Eeological Security for InterBasin Regional Water Diversion Project,475004;Kaifeng Ecological Environment Monitoring and Security Center,475008:Kaifeng,China)

机构地区：[1]黄河水利职业技术学院,475004 [2]开封河南省跨流域区域引调水运行与生态安全工程研究中心,475004 [3]开封市生态环境监测和安全中心,475008,河南开封

出　　处：《水处理技术》2024年第10期90-95,共6页Technology of Water Treatment

基　　金：国家级职业教育教师教学创新团队课题研究项目(ZH2021040101);河南省重大科技专项项目(231100320100);河南省2023年水利科技攻关项目计划(GG202337)。

摘　　要：邻苯二甲酸二乙酯(DEP)是水生态系统内高频检出污染物,然而DEP对新工艺厌氧-好氧-缺氧运行效能的影响至今尚不清楚。为了填补空白,本工作考察了DEP对新工艺处理低C/N废水的影响并分析了相关作用机制。结果表明,DEP显著抑制了新工艺内COD及脱氮除磷效率,且DEP浓度越高,COD去除抑制越显著。典型周期发现DEP能抑制厌氧阶段和缺氧阶段COD的消耗而对好氧阶段COD去除影响不显著。DEP降低了厌氧释磷和好氧吸磷过程导致生物除磷效率下降。DEP提高AOA工艺内胞外聚合物(EPS)含量,并促进了主要组分蛋白质和多糖的分泌。微生物学揭示高浓度DEP降低了Patescibacteria、Bacteroidetes和Nitrospirae门水平上关键微生物的相对丰度。研究结果对AOA高效去除新污染物DEP提供了数据支持。Diethyl phthalate(DEP)is a high-frequency pollutant detected in the aquatic ecosystem,but the effect of DEP on the performance of the new process is still unclear.In order to fill the gap,the effect of DEP on the treatment of low C/N wastewater by the new process was investigated and the related mechanism was analyzed.The results showed that DEP significantly inhibited COD and nitrogen and phosphorus removal efficiency in the new process,and the higher the concentration of DEP,the more significant the inhibition of COD removal.In the typical cycle,it was found that DEP could inhibit the consumption of COD in anaerobic phase and anoxic stage,but had no significant effect on COD removal in aerobic phase.DEP reduced the process of anaerobic phosphorus release and aerobic phosphorus uptake,resulting in the decrease of biological phosphorus removal efficiency.DEP increased the content of extracellular polymer(EPS)in AOA process and promoted the secretion of proteins and polysaccharides.Microbiology revealed that high concentration of DEP reduced the relative abundance of key microorganisms at the level of Patescibacteria,Bacteroidetes and Nitrospirae.The results provide data support for the efficient removal of new pollutants DEP by AOA.

关 键 词：脱氮除磷 活性污泥 典型周期 DEP 污泥特征 

分 类 号：X703[环境科学与工程—环境工程]