期刊
BIORESOURCE TECHNOLOGY
卷 270, 期 -, 页码 230-235出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.012
关键词
Anaerobic biotechnology; Coal gasification wastewater; Nitrogen doped sewage sludge carbon; Direct interspecies electron transfer; Acidic shocks
资金
- National Natural Science Foundation of China [51708505, 51678531]
- Zhejiang Provincial Natural Science Foundation of China [LQ17E080008]
- NSFC-Zhejiang Joint Fund for the Integration of Industrialization and Informatization [U1609214]
- Major Projects for Science and Technology Development of Zhejiang Province [2017C03010]
Waste sewage sludge was converted into the novel conductive material of nitrogen doped sewage sludge carbon (N-SC) to enhance anaerobic degradation of coal gasification wastewater (CGW). The results indicated that N-SC played a significant role in enhanced efficiencies, with chemical oxygen demand (COD) removal efficiency increased by 25.4%, methane production rate improved by 68.1% and total volatile fatty acids (VFA) decreased by 37.5% than that of controlled reactor. The conductivity, activity of electron transport, and extracellular polymeric substances (EPS) of anaerobic sludge were remarkably enhanced with N-SC, which promoted sludge granulation and supplied better conductive environment for microorganisms. The microbial community analysis revealed that potential enhancement of direct interspecies electron transfer (DIET) was achieved by electrical connection between enriched Geobacter, Pseudomonas and Methanosaeta with N-SC assisted, which enhanced the anaerobic degradation of CGW. Moreover, anaerobic degradation with N-SC had higher capacity to resist acidic shocks, facilitating the process stability.
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