Journal
BIORESOURCE TECHNOLOGY
Volume 80, Issue 2, Pages 153-156Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0960-8524(01)00083-9
Keywords
spent tea leaves; two-phase biomethanation; hydrolysis; acidification; leachate; methanation; biogas yield
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Anaerobic digestion of spent tea leaves from an instant tea manufacturing factory was studied in a two-phase digester. The hydrolysis and acidification phase resulted in the formation of high organic strength liquid called leachate, with a chemical oxygen demand (COD) of 12,880 mg/l, within the retention time of 10 days. The leachate was tested in a batch methanaogensis reactor for biogas production. An average biogas yield of 0.48 m(3)/kg of COD destroyed was obtained with an average COD reduction of 93%. The biogas was analyzed for 73% methane content. (C) 2001 Elsevier Science Ltd. All rights reserved.
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