化工进展2024，Vol.43Issue(4)：2135-2143,9.DOI:10.16085/j.issn.1000-6613.2023-0629
复合硫基质驱动自养反硝化脱氮除磷效能与微生物群落结构
Simultaneous nitrogen and phosphorus removal and microbial community structure under autotrophic denitrification driven by complex sulfur substrate
摘要
Abstract
Facing the drawback of autotrophic denitrification performance driven by a single sulfur base,three groups of complex sulfur substrate packed bed reactors(B1,B2,B3)were constructed by using elemental sulfur(S0)and natural iron sulfur ores(FeS,Fe1-xS,FeS2)as biological fillers.The deep nitrogen and phosphorus removal effect and microbial community structure characteristics of municipal tailwater were investigated during start-up and stable operation of the reactors.The results indicated that the high denitrification performance were obtained in the three reactors and the NO3-N removal efficiency increased with the extension of the reactor hydraulic retention time(HRT).When the reactor HRT was 12h(B1),12h(B2)and 9h(B3),20mg/L NO3-N was completely removed.The PO43-P was removed through chemical precipitation with iron ions generated in the denitrification process,and P removal rate was positively correlated with the effect of nitrogen removal.The SO42-/NO3-of the complex sulfur substrate reactor was lower than that of the single sulfur based autotrophic denitrification system.Also,sulfate production accordingly decreased and the pH was maintained above 6.3 without adding pH buffers.Microbial community structure analysis showed that Thiobacillus and Ferritrophicum were the dominant genera of sulfur autotrophic denitrifying bacteria in the three reactors.The relative abundances of Thiobacillus and Ferritrophicum in B1,B2 and B3 reactors were 16.07％and 31.24％,30.07％and 50.19％,and 30.20％and 11.62％,respectively.The complex sulfur substrate enhanced the richness and species diversity of microbial communities,which showed better nitrogen and phosphorus removal performance.关键词
硫自养反硝化/复合硫基质填充床/市政尾水/同步脱氮除磷/微生物群落分析Key words
sulfur autotrophic denitrification/complex sulfur substrate packed bed/municipal tailwater/simultaneous nitrogen and phosphorus removal/microbial community analysis分类
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葛四杰,杨大鑫,吕君,王振,张传义,张文华..复合硫基质驱动自养反硝化脱氮除磷效能与微生物群落结构[J].化工进展,2024,43(4):2135-2143,9.基金项目
中央高校基本科研业务费专项项目(2019XKQYMS79) （2019XKQYMS79）
国家自然科学基金(52270171) （52270171）
科技部基地与人才专项课题(2022XJKK1004). （2022XJKK1004）
