Sulfite altered permanganate effects on acetate-enriched short-chain fatty acids production during sludge anaerobic fermentation

被引：12

作者：

Wu, Lijuan ^{[1
]}

Zhu, Rui ^{[1
]}

Han, Xiaoxia ^{[1
]}

Chen, Yan ^{[1
]}

Long, Zhen ^{[1
]}

Dong, Hao ^{[1
]}

Chen, Xiaojiang ^{[1
]}

Wu, Yang ^{[2
]}

Su, Yinglong ^{[3
]}

Zhang, Zhengyong ^{[1
]}

Luo, Jingyang ^{[4
]}

机构：

[1] Jiangsu Environm Protect Grp Co Ltd, Jiangsu Environm Engn Technol Co Ltd, Nanjing 210036, Peoples R China

[2] Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China

[3] East China Normal Univ, Shanghai Engn Res Ctr Biotransformat Organ Solid W, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China

[4] Hohai Univ, Coll Environm, Nanjing 210098, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 371卷

关键词：

Hydrolysis; Microbial structure; Amino acid metabolism; Metabolic networks; Gene expression;

D O I：

10.1016/j.biortech.2023.128589

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Anaerobic fermentation is a promising method for waste activated sludge (WAS) treatment, but ineffective solubilization and hydrolysis limit its application. The current study examined the function of sodium sulfite (SDS) in potassium permanganate (PP)-conditioned WAS fermentation for short-chain fatty acids (SCFAs) biosynthesis. The presence of SDS in the PP system (PP/SDS) reduced the positive effects of PP on total SCFAs yield (2755 versus 3471 mg COD/L), while effectively increasing the proportion of acetate (from 41 to 81 %). Not only did SDS decrease the promoting effects of PP on WAS solubilization and hydrolysis efficiency by 5-42 %, it also shifted microbial metabolic pathways to favor acetate production. In addition, the amino acid meta-bolism with acetate as end product was enhanced. Moreover, PP/SDS inhibited methanogenesis, resulting in an accumulation of acetate in high quantities. Thus, the current study a provided insight and direction for effective WAS treatment with acetate-enriched SCFAs production.

引用

页数：8

共 36 条

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