Solid-phase denitrification in high salinity and low-temperature wastewater treatment

被引：45

作者：

Han, Fei ^{[2
]}

Li, Xuan ^{[3
]}

Zhang, Mengru ^{[2
]}

Liu, Zhe ^{[2
]}

Han, Yufei ^{[2
]}

Li, Qian ^{[2
]}

Zhou, Weizhi ^{[1
]}

机构：

[1] Shandong Univ, Sch Civil Engn, Jinan 250002, Shandong, Peoples R China

[2] Shandong Univ, Sch Environm Sci & Engn, Qingdao 266000, Shandong, Peoples R China

[3] Shandong Acad Environm Planning, Jinan 250002, Shandong, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2021年 / 341卷

基金：

中国国家自然科学基金;

关键词：

Solid-phase denitrification; High salinity wastewater; Low temperature; Soluble microbial products; Microbial community; EXTRACELLULAR POLYMERIC SUBSTANCES; SOLUBLE MICROBIAL PRODUCTS; DISINFECTION BY-PRODUCTS; ASSOCIATION NETWORKS; ACTIVATED-SLUDGE; GRANULAR SLUDGE; NO; EXCITATION; COMMUNITY; DYNAMICS;

D O I：

10.1016/j.biortech.2021.125801

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Nitrogen removal from wastewater is often deteriorated under high salinity and low temperature. Solid-phase denitrification (SPD) might improve total nitrogen removal efficiency (TNRE) by stably supplying carbon resources under adverse conditions. In this study, an SPD biofilm reactor was successfully established by inoculating halophilic sludge and filling poly (butanediol succinate) (PBS) granules, and achieved over 96% TNRE at low temperature. More extracellular polysaccharides were produced at low temperature. Microbial network analysis evidenced dominant heterotrophic denitrifiers (Marinicella, Fusibacter, Saccharicrinis and Vitellibacter) at 25 degrees C were replaced by genera Melioribacter, Marinobacter, Desulfatitalea and Thiomicrospira at 15 degrees C. At low temperature, genes nirS and narG might be mainly responsible for denitrification. Fluorescence spectrum coupled with fluorescence regional integration and parallel factor analysis revealed low temperature increased the proportion of proteins of soluble microbial products. This study provides guidance for the practical application of SPD in the treatment of high salinity and low-temperature wastewater.

引用

页数：9

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