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The Anaerobic Biodegradation of a Bagasse‐Based Paper‐Mill Waste in Fixed‐Film Reactor
Author(s) -
Prasad Duggirala Yogendra
Publication year - 1992
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280530110
Subject(s) - chemical oxygen demand , bagasse , alkalinity , pulp and paper industry , wastewater , waste management , biogas , anaerobic exercise , anaerobic respiration , anaerobic digestion , chemistry , biodegradation , effluent , environmental science , methane , environmental engineering , engineering , physiology , organic chemistry , biology
The high concentration of biodegradable constituents in waste‐water derived from bagasse‐based paper mills warrants the consideration of an anaerobic biotechnology process to recover biogas and reduce the pollution load. An anaerobic down‐flow fixed‐film bark reactor process was studied to treat waste‐water generated from bagasse‐based paper mills. At the anaerobic stage, 90–95% of the total chemical oxygen demand (COD) was removed at loading rates of 3–18 kg COD m% −3 day% −1 without supplying any nutrients or trace elements. A yield coefficient of 0.156 g cells (g COD) % −1 was calculated at a high COD loading rate of 18 kg COD m% −3 day% −1 . With the anaerobic treatment process it is estimated that 1 m 3 of bagasse waste‐water with a COD content of 13000 mg dm% −3 can produce about 3.5 m 3 of methane. Intermittent checks on the system alkalinity revealed that feed neutralization to maintain alkalinity would be necessary with sodium bicarbonate at approximately 2500 mg dm% −3 for achieving steady‐state high treatment efficiency.