| Autor: |
Shuli Liu, Aijuan Zhou, Yaxin Fan, Yanqing Duan, Zhihong Liu, Zhangwei He, Wenzong Liu, Xiuping Yue |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Science of the total environment. 861 |
| ISSN: |
1879-1026 |
| Popis: |
Persulfate has been applied extensively for waste activated sludge (WAS) decomposition due to the strong oxidizing sulfate radical generated as a product. However, the efficiency is not improved without activation to produce free radicals. In this study, a novel coupling strategy of heat-activated persulfate (Heat_PS) pretreatment and sulfate-reducing bacteria (SRB) triggering was explored to enhance short-chain fatty acids (SCFAs) produced by WAS fermentation. The remaining sulfate acts as an essential acceptor of electrons for the metabolism of synergistic SRB, thereby boosting WAS acidification by energetic cooperation with anaerobic fermenters. The results showed that SCFAs yield in the Heat_PS + SRB group peaked at 431.89 mg COD/gVSS, with the proportion of acetate reaching 57.8 %. This was 6.33 and 1.75 times higher than that in raw and single Heat_PS treated WAS, respectively. Carbon balance revealed a conversion rate of 26.1 % of carbon content in WAS to SCFAs, with 4.5 % lower CO |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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