Biomethanation of plant materials and agricultural residues using dung samples as wild population of microbes and also with isolated methanogens

Nilanjan Chakraborty (), G.M. Sarkar and S.C. Lahiri ()
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Nilanjan Chakraborty: Kalyani University, Kalyani
G.M. Sarkar: Kalyani University, Kalyani
S.C. Lahiri: Kalyani University, Kalyani

Environment Systems and Decisions, 2002, vol. 22, issue 2, 173-182

Abstract: Abstract Recycling of plant materials and agricultural residues for biomethanation was attempted in vials. The methanogenic activities of certain sewage samples have also been tested. Both sterilized and non-sterilized biomasses were used. Biomethanation was carried out with dung samples (cow, goat, buffalo, piggery wastes and poultry wash) as wild populations of microbes and in combination with other microbial isolates (isolated in the laboratory). Biomethanation had been observed to be good in most cases and particularly with the sterilized biomass. Mixed inoculum (dung samples and poultry wash) was found to be best for biomethanation. Of the microbe isolates, isolates from buffalo, pig and paper mill wastes appear to be most effective. Pretreated sawdust and rice straw were found to be good subtrates for biomethanation. Of the different plant biomass used Spirogyra (algae), Ipomea and water hyacinth were most effective whereas Jatropa gossypifolia and Parthenium sp. were the least effective. Biomethanation of Spirogyra was carried out both in anoxic and oxic conditions. Though methane production decreased enormously under oxic conditions, definite methane production continued indicating that the biomethanation process is not exclusively anoxic. Similarly, biomethanation of sewage samples from different sewage treatment plants were carried out with and without isolated methanogens and methane production was found to be moderate.

Keywords: agricultural residues; biomass; biomethanation; dung samples; methanogen; plant materials; rice straw; sawdust; sewage (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1023/A:1015346119325

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