期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 658, 期 -, 页码 1131-1138出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.12.280
关键词
Algae; Anaerobic fermentation; Alkaline pH; Short-chain fatty acids; Electron transfer
资金
- National Natural Science Foundation of China [21777121, 51425802]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRK16003]
- Fundamental Research Funds for the Central Universities [22120180062]
Alkaline pH was beneficial for short-chain fatty acids (SCPAs) production from algae during anaerobic Fermentalion. This study focused on the effects of activated carbon on SCFAs production from algae during alkaline anaerobic fermentation. When activated carbon was present at 0.5 g/L, the maximum production of SCFAs was 4875 mg COD/L, which was nearly 24 times that of the control (2026 mg/L). Moreover, the fermentation time required for the highest SCFAs production was shortened from 6 (tin the control to 4 d with activated carbon. Mechanism exploration revealed that solubilization and hydrolysis of algae as well as activities of key hydrolases and quantities of encoding genes were improved in the presence of activated carbon, which provided more proteins and carbohydrates for acid-forming bacteria. More importantly, the electron transfer among microorganisms in the algae fermentation systems was enhanced by activated carbon, contributing to improvement of the SCFAs yield and reduction of fermentation time. (C) 2018 Elsevier B.V. All rights reserved.
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