期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 625, 期 -, 页码 64-70出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.12.158
关键词
Nanoplastic; Sewage sludge; Anaerobic digestion; Microbial community structure
资金
- Natural Science Foundation of Jiangsu Province, China [BK20170188]
- National Science Foundation of China [51478453]
- Key Project of China [2016YFE0123600]
- Open Foundation of Jiangsu Key Laboratory of Anaerobic Biotechnology [JKLAB201710]
In this study, impacts of nanoplastic on the pure and mixed anaerobic digestion systems were investigated. Results showed the growth andmetabolismof Acetobacteroides hydrogenigenes were partly inhibited by nanoplastic existed in the pure anaerobic digestion system. The anaerobic digestion of sewage sludge was also obviously inhibited by nanoplastic existed in the mixed anaerobic digestion system. Both the methane yield and methane production rate of themixed anaerobic digestion system showed negative correlation with the nanoplastic concentration. Compared with anaerobic digestion system without nanoplastic, methane yield and maximum daily methane yield at the nanoplastic concentration of 0.2 g/L decreased for 14.4% and 40.7%, respectively. In addition, the start-up of mixed anaerobic digestion system was prolonged by addition of nanoplastic. Microbial community structure analysis indicated the microbial community structures were also affected by nanoplastic existed in the system. At the nanoplastic concentration of 0.2 g/L, the relative abundances of family Cloacamonaceae, Porphyromonadaceae, Anaerolinaceae and Gracilibacteraceae decreased partly. Conversely, the relative abundances of family Anaerolinaceae, Clostridiaceae, Geobacteraceae, Dethiosulfovibrionaceae and Desulfobulbaceae improved partly. (c) 2017 Elsevier B.V. All rights reserved.
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