Effect of hydraulic retention time on denitrification performance and microbial communities of solid-phase denitrifying reactors using polycaprolactone/corncob composite
文献类型： 外文期刊
作者： Cui, Hongwu 1 ; Feng, Yuna 1 ; Lu, Weibin 1 ; Wang, Lu 2 ; Li, Hao 1 ; Teng, Yu 1 ; Bai, Ying 1 ; Qu, Keming 1 ; Song, Yingying 1 ; Cui, Zhengguo 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Shandong, Peoples R China
2.Laoshan Lab, Qingdao 266237, Peoples R China
3.Zhejiang Ocean Univ, Sch Marine Sci & Technol, Zhoushan 316022, Zhejiang, Peoples R China
4.Dalian Ocean Univ, Coll Fisheries & Life Sci, Dalian 116023, Liaoning, Peoples R China
关键词： Polycaprolactone/corncob composite; Solid -phase denitrification; Hydraulic retention time; Bacterial community
期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.3； 五年影响因子：6.1 ）
ISSN： 0025-326X
年卷期： 2024 年 205 卷
页码：
收录情况： SCI
摘要： This study investigated the effect of hydraulic retention time (HRT) on the denitrification performance and microbial composition of reactors, packed with composite polycaprolactone and corncob carbon sources, during the treatment mariculture wastewater. The optimal HRT was 3 h, and average nitrogen removal efficiency was 99.00 %, 99.07 %, and 98.98 % in the HRT =3, 5, and 7 h groups, respectively. However, the 3 h group (DOC 2.91 mg/L) was the only group with a lower DOC concentration than that of the influent group (3.31 mg/L). Moreover, species richness was lower at HRT =3 h, with a greater proportion of denitrification-dominant phyla, such as Proteobacteria. The abundance of the NarG, NirK, and NirS functional genes suggested that the HRT =3 h group had a significant advantage in the nitrate and nitrite reduction phases. Under a short HRT, the composite carbon source achieved a good denitrification effect.
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