期刊
WASTE MANAGEMENT
卷 76, 期 -, 页码 394-403出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.03.037
关键词
Granular activated carbon; Interspecies electron transfer; Methanogenesis; Syntrophic oxidization; Volatile fatty acids
资金
- National Natural Science Foundation of China [51308337]
- Bill and Melinda Gates Foundation [OPP1051913]
Granular activated carbon (GAC) could promote methane production from organic wastes, but a wide range of dosages has been reported. In present study, different GAC dosages of 0, 0.5, 5 and 25 g/L were supplemented into anaerobic digesters and the methanogenic degradation kinetics of acetate, propionate and butyrate were characterized, respectively. At high organic load of 5 g/L, the degradation rates of propionate and butyrate increased by 1.5-4.7 and 2.5-7.0 times at varied GAC dosages. The methane production rates (R-max) from propionate and butyrate were significantly elevated when increasing GAC dosage up to 5 However, only a minor increment was found for acetate degradation either at 1 or 5 g/L. The stimulatory mechanism of GAC for accelerated syntrophic degradation of propionate and butyrate can be primarily attributed to the triggering effect on acetogenesis, as evidenced by the enrichment of syntrophic bacteria e.g. Thermovirga, Synergistaceae, and Syntrophomonas etc. (C) 2018 The Authors. Published by Elsevier Ltd.
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