文献类型： 外文期刊
作者： Li, Hua 1 ; Duan, Yafei 1 ; Dong, Hongbiao 1 ; Zhang, Jiasong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Minist Educ,Guangdong Prov Key Lab Fishery Ecol En, Guangzhou 510300, Peoples R China
2.Sanya Trop Fisheries Res Inst, Key Lab Efficient Utilizat & Proc Marine Fishery R, Sanya 572018, Peoples R China
关键词： Aquaculture wastewater; Denitrification; Denitrifying bacteria; Immobilized microorganisms; Encapsulation
期刊名称：BIOCHEMICAL ENGINEERING JOURNAL （ 影响因子：3.8； 五年影响因子：3.7 ）
ISSN： 1369-703X
年卷期： 2024 年 211 卷
页码：
收录情况： SCI
摘要： The lack of denitrifying bacteria and organic carbon sources, and the inhibition of dissolved oxygen (DO) result in nitrate accumulation in aquaculture wastewater. In order to solve this problem, an encapsulation method was introduced to prepare a novel bioactive capsule, which can provide organic carbon source, denitrifying bacteria, and anoxic microenvironment for aquaculture wastewater denitrification. And can reduce the recovery time of the enclosed denitrifying bacteria. The morphology of the capsule, its nitrate removal rate, and nitrogen conversion pathway in synthetic aquaculture wastewater were investigated. The capsule had a porous surface and the pore diameter ranged from 150.0 nm to 300.0 nm. The enclosed denitrifying bacteria had a reduced recovery time and excellent denitrification performance. The nitrate removal rate reached 86.2 % on the first day and was maintained at 99.7 %. Nitrogen conversion pathways in the capsule include denitrification, assimilatory/ dissimilatory nitrate reduction, and nitrogen fixation. The denitrifying capsule has short recovery time and good denitrification performance, which would help to achieve denitrification in aquaculture wastewater or other low C/N wastewater.
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