Bioaugmentation with Diaphorobacter polyhydroxybutyrativorans to enhance nitrate removal in a poly (3-hydroxybutyrate-co-3-hydroxyvalerate)supported denitrification reactor
文献类型： 外文期刊
作者： Zhang, Shusong 1 ; Sun, Xingbin 3 ; Wang, Xuming 1 ; Qiu, Tianlei 1 ; Gao, Min 1 ; Sun, Yanmei 1 ; Cheng, Shoutao 1 ; Zhang, Qingjing 4 ;
作者机构： 1.Beijing Agrobiotechnol Res Ctr, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing 100097, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Beijing 100097, Peoples R China
3.Northeast Forestry Univ, Coll Life Sci, Harbin 150040, Heilongjiang, Peoples R China
4.Beijing Fisheries Res Inst, Beijing Key Lab Fishery Biotechnol, Beijing 100068, Peoples R China
关键词： Diaphorobacter polyhydroxybutyrativorans; Solid-phase denitrification; Poly (3-hydroxybutyrate-co-3-hydroxyvalerate); Microbial community
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）
ISSN： 0960-8524
年卷期： 2018 年 263 卷
页码：
收录情况： SCI
摘要： A newly isolated and identified Diaphorobacter polyhydroxybutyrativorans strain (SL-205) was employed to enhance the denitrification performance of a laboratory-scale solid-phase denitrification (SPD) reactor using poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as a carbon source, and dynamic variations in microbial communities in the reactor were investigated. Results indicated that bioaugmentation with strain SL-205 enabled rapid reactor startup and improved denitrification performance relative to the reactor inoculated with activated sludge. Illumina sequencing revealed that bioaugmentation also significantly increased Proteobacteria abundance along with increased influent nitrate loading. Additionally, two genera of PHBV-degrading denitrifers, Diaphorobacter and Acidovorax, exhibited higher abundance, and elevated expression of denitrificationassociated genes (narG, nirK, and nirS) was observed following bioaugmentation relative to the control at influent nitrate loading ranging from 1.28 g N/(L.d) to 1.6 g N/(L.d).
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