期刊
WASTE MANAGEMENT
卷 68, 期 -, 页码 96-102出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2017.06.010
关键词
Anaerobic digestion; Tuna waste; Volatile fatty acids (VFA); Hydrolysis
资金
- Spanish Ministry of Science and Innovation [CTM2009-14553-TECNO]
- Ministry of Economy and Competitiveness [CTQ2013-45581-R]
- European FEDER funds
Fish canning industries generate a significant amount of solid waste that can be digested anaerobically into volatile fatty acids (VFA). The aim of this research was to study the effect of various pHs, ranging from 5.0 to 10.0, and percentage of total solids on the anaerobic digestion of tuna waste into VFA, both in batch assays and continuous reactor. The production of VFA was affected by pH and was significantly higher under alkaline conditions. At pH 8.0, the VFA production reached 30,611 mg COD/L. The VFA mainly consisted of acetic, propionic, n-butyric and i-valeric acids. Acetic acid was the main product at all the pHs tested. In terms of total solids (TS) the best results were obtained with 2.5% total solids, reaching 0.73 g CODVFA/g CODWaste. At higher TS concentrations (5 and 8% TS) lower yields were reached probably due to inhibition at high VFA concentration. (C) 2017 Elsevier Ltd. All rights reserved.
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