Fe_(3)O_(4)对含盐废水厌氧处理系统的影响  

Influence of Fe_(3)O_(4)on the anaerobic treatment system of saline wastewater

作　　者：马凯丽 王威 刘雨晴 严梦怡 崔延瑞 康威 曹治国 MA Kai-li;WANG Wei;LIU Yu-qing;YAN Meng-yi;CUI Yan-rui;KANG Wei;CAO Zhi-guo(Henan Key Laboratory for Environmental Pollution Control,Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control,Ministry of Education,School of Environment,Henan Normal University,Xinxiang 453007,China)

机构地区：[1]河南师范大学环境学院,黄淮水环境与污染防治教育部重点实验室,河南省环境污染控制重点实验室,河南新乡453007

出　　处：《中国环境科学》2022年第11期5128-5135,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(51908199,42122057,41977308);中国博士后科学基金(2022M711072);河南省自然科学基金资助项目(212300410179);2021年河南师范大学研究生科研创新资助项目([2021]12)。

摘　　要：通过在固定的水力停留时间下(24h)逐步提升盐度,并设置有无Fe_(3)O_(4)的平行反应器作对照,考察不同盐度水平下Fe_(3)O_(4)对厌氧系统运行效能和厌氧污泥颗粒化进程的影响.结果表明,在0~2%的NaCl盐度水平下,Fe_(3)O_(4)的加入均能有效提升厌氧系统的处理效率并保证其稳定进行.Fe_(3)O_(4)对产甲烷过程的促进作用在不同盐度水平下有所差异,当盐度分别为0,0.5%,1%,2%时,实验组的甲烷产量分别为对照组的1.08,1.36,1.33和1.17倍,低盐环境下的促进效果更为显著.污泥特性和胞外聚合物的分析结果发现,Fe_(3)O_(4)的引入有利于形成结构更为紧密的厌氧颗粒污泥,进而强化厌氧污泥颗粒化进程.微生物群落结构分析结果表明,随着盐度提升,氢型产甲烷菌得以快速富集,同时主要细菌类型和代谢途径均发生了改变.而Fe_(3)O_(4)对厌氧系统中微生物菌群结构和代谢途径的影响在低盐度(0.5%)和较高盐度(1%,2%)下也存在显著差异.The salinity was stepwise increased at fixed hydraulic retention time of 24h,two parallel anaerobic reactors with and without Fe_(3)O_(4)were applied to investigate the influence of Fe_(3)O_(4)on operational performance and sludge granulation of anaerobic system.The addition of Fe_(3)O_(4)could effectively enhance the anaerobic treatment efficiency and ensure the stable operation at all tested salinity.The improvement of Fe_(3)O_(4)on methane yield differed significantly at salinity varying from 0~2%.At salinity of 0,0.5%,1%and 2%,the methane yield of Fe_(3)O_(4)-supplemented reactor was 1.08,1.36,1.3 and 1.17-fold of the contrast reactor,the enhancement of Fe_(3)O_(4)on methane yield was more significant under low salinity.In addition,the sludge properties and extracellular polymer substances secretion during the operation process were simultaneously analyzed as well.The results showed that the addition of Fe_(3)O_(4)facilitated the formation of closely-packed anaerobic granular sludge,thus enhanced the anaerobic granulation process.According to the microbial community structure analysis,hydrogenotrophic methanogens were rapidly enriched with the increase of salinity,while the main bacterial consortium and metabolic pathways were changed as well.The effects of Fe_(3)O_(4)on the microbial community structure and metabolic pathway of anaerobic system were also observed obviously distinct under low salinity(0.5%)and high salinity(1%,2%).

关 键 词：四氧化三铁 含盐废水 厌氧颗粒污泥 UASB反应器 微生物群落结构 

分 类 号：X703[环境科学与工程—环境工程]