Two-phase anaerobic digestion of spent tea leaves for biogas and manure generation

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 rete...

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Bibliographic Details
Published in:Bioresource technology 2001-11, Vol.80 (2), p.153-156
Main Authors: Goel, B, Pant, D.C, Kishore, V.V.N
Format: Article
Language:English
Subjects:
Acidification
Anaerobiosis - physiology
Biodegradation, Environmental
Biofuel production
Biogas
Biogas yield
Biological and medical sciences
Bioreactors
Biotechnology
Chemical oxygen demand
Energy
Euryarchaeota - metabolism
Food industries
Fundamental and applied biological sciences. Psychology
Hydrolysis
Industrial applications and implications. Economical aspects
Leachate
Leachate treatment
Manure - microbiology
Methanation
Methane - metabolism
Plant Leaves - chemistry
Plant Leaves - microbiology
Spent tea leaves
Tea - chemistry
Tea - microbiology
Two-phase biomethanation
Use and upgrading of agricultural and food by-products. Biotechnology
Waste Products
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Summary: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.
ISSN:0960-8524
1873-2976
DOI:10.1016/S0960-8524(01)00083-9