WANGYue.Hydrogen Production through Dark Fermentation of Excess Sludge Enhanced by Aged Refuse[J].China Water & Wastewater,2024,40(5):105-110.
Hydrogen Production through Dark Fermentation of Excess Sludge Enhanced by Aged Refuse
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第5期
Page:
105-110
Column:
Date of publication:
2024-03-01
- Keywords:
- excess sludge; dark fermentation; aged refuse; hydrogen; resource utilization
- Abstract:
- This paper investigated the effect of aged refuse (AR) on the hydrogen production of sludge dark fermentation, and analyzed the enhanced mechanism of AR on the sludge dark fermentation from the aspects of organic matter biotransformation process, enzymatic characteristics and microbial community characteristics, so as to enhance hydrogen production of sludge dark fermentation. When the AR content was 9%, the hydrogen yield was as high as 15.6 mL/g, approximately 1.25 times that of the blank group. In addition, AR promoted the process of sludge hydrolysis and acidification, and increased the contents of dissolved COD, dissolved protein and polysaccharide in the fermentation broth to 4 265 mg/L, 2 903 mg/L and 1 195 mg/L, respectively. AR increased the activity of key enzymes related to hydrolysis and acidification process, and affected the characteristics of microbial community in sludge dark fermentation. At the phylum level, AR increased the relative abundance of Firmicutes and Proteobacteria. At the genus level, it increased the relative abundance of Bacteroides and Gallicola. These microorganisms were all related to the process of sludge hydrolysis and acidification.
Last Update:
2024-03-01