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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 10, 2016, pp. 2363-2374
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Bioline Code: st16219
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 10, 2016, pp. 2363-2374
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Selective digestion of industrial potato wastes for efficient biomethanation: a sustainable solution for safe environmental disposal
Jacob, S.; Chintagunta, A. D. & Banerjee, R.
Abstract
Potato being the staple vegetable in India is
widely cultivated and processed for different value additions.
During processing of potato, a huge amount of waste
is generated in the form of peel and meat (mash). These
wastes constitute a potential feedstock for biogas generation.
The present study is focused on mitigation of acidogenesis
that occurs during early stages of anaerobic
digestion (AD) of potato waste which eventually inhibits
the process of methanogenesis. A novel strategy of selective
digestion was adopted in which the leachate and solid
slurry resulting from the first stage digestion were further
subjected to second stage by separating the solid and liquid
phases. The obtained results indicated that stepwise
digestion enhanced biomethane yield with an increase in
methane percent from 46.47 to 60.4 % and reduction in
total COD to about 94 %. Another novel strategy adopted
in this study was the use of specifically developed microbial
consortia for AD of potato wastes instead of conventional
inoculum for production of biogas. The obtained
yield is at par with the conventional inoculums which
suggests that the developed consortia could act as potential
substitute. The present study paves the way for sustainable
utilization of industrial potato wastes for bioenergy production
by overcoming the problems associated with conventional
processes.
Keywords
Anaerobic digestion; Bioenergy; Biogas; Methane
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