LIUZhan-hua,SONGXiu-lan,LIUYao-hui.Effect of Different Kinds of Carbon Source on PHA Synthesis and Microbial Community of Activated Sludge[J].China Water & Wastewater,2023,39(11):1-7.
Effect of Different Kinds of Carbon Source on PHA Synthesis and Microbial Community of Activated Sludge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第11期
Page:
1-7
Column:
Date of publication:
2023-06-01
- Keywords:
- activated sludge; polyhydroxyalkanoate (PHA); short chain fatty acid; carbon source; microbial community
- Abstract:
- To explore the feasibility of synthesizing polyhydroxyalkanoate (PHA) using carbon source from alkaline fermentation of excess sludge coupled with potassium perbisulfate compound salts (PMS), the simulated excess sludge alkaline (pH=10) fermentation solution (pH10 fermentation solution) and simulated PMS coupled with excess sludge alkaline (pH=10) fermentation solution (pH10+PMS fermentation solution) were used as carbon sources respectively to investigate the PHA production of mixed bacteria in activated sludge and the change of microbial community composition in the enrichment and synthesis stages. When the two kinds of fermentation solutions were used as carbon sources, the maximum PHA yields in the enrichment stage were 10.61% and 12.22%, and the cumulative PHA yields in the synthesis stage were 42.84% and 52.53%, respectively. The microbial community composition in enrichment stage was different when different carbon sources were used for PHA production. Compared with pH10 fermentation solution as carbon source, the content of functional bacterial group (such as Paracoccus, Thauera and Meganema) related to PHA synthesis was higher when the carbon source was pH10+PMS fermentation solution, which was more conducive to PHA synthesis. Therefore, the pH10+PMS fermentation solution was a more suitable carbon source.
Last Update:
2023-06-01