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Biogas production from cattle dung supplemented with paddy straw and evaluation of manurial value of spent slurry

KrishiKosh

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Title Biogas production from cattle dung supplemented with paddy straw and evaluation of manurial value of spent slurry
 
Creator Narula, Amrita
 
Contributor Leela Wati
 
Subject Costs, Livestock, Animal husbandry, Productivity, Milk products, Economic systems, Manpower, Crossbreds, Economics, Concentrates
 
Description The basic problem we face today is that the earth's natural resources of energy are being
depleted at a most alarming rate but our conventional energy resources are limited and already
have been over exploited. It indicates that there is need to look up for alternate resources of
energy. Motivated by the need to meet the ever-increasing energy demand and sustainability
consciousness, many Governments have promoted renewable energy technologies such as
biogas. Biogas (a mixture of approximately 60% methane and 40% carbon dioxide) is a wellestablished
fuel that can supplement as an energy source for cooking and lighting in
developing countries. Most of the biogas plants in India are being operated with diluted cattle
dung slurry at 7-8% total solid concentration. Due to constraints in these conventional biogas
systems, solid state fermentation system operated at about 15% total solid concentration using
cattle dung as substrate has come into existence. Availability of animal waste is one of the
major problem for successful operation of biogas digesters. So researchers are looking towards
other alternative substrates. Agricultural residues represent the most important energy sources
readily available for biogas production and paddy straw is one of such residue. Anaerobic
digestion of paddy straw alone is inefficient because the nutrients and minerals required for
bacterial growth are not present at sufficient level . Paddy straw in India is generated in huge
amount and its management for farmers has become a big challenge so it is burnt. To reduce
environmental pollution and to supply sufficient biogas production necessitated this study,
with the ultimate goal of assessing the effect of co-digestion of cattle dung and paddy straw
on biogas production. Cattle dung and paddy straw were mixed in ratios 1:00, 1:0.31, 1:0.46,
1:0.63 and 1:0.78 on dry matter basis and digested in semi continuous mode at two total solid
(TS) concentrations i.e 12-13% and 14-15% for ten weeks. The maximum biogas production of
53.7 l/kg and TS degradation of 19.6% was obtained on supplementation of 5% paddy straw to
cattle dung at 14-15% total solid concentration. The N, P and K content of effluent were 1.56,
0.54 and 1.55% respectively. On adjustment of C/N ratio of paddy straw and cattle dung to the
level of cattle dung a constant rate of biogas i.e 0.311 l/l/day was obtained in all
supplementation levels of paddy straw to cattle dung. Composting of spent substrate after
biomethanation with Trichoderma reesei. inoculation resulted in further reduction of C/N ratio
within one month producing quality manure.
 
Date 2016-11-11T14:26:56Z
2016-11-11T14:26:56Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/85141
 
Language en
 
Format application/pdf
 
Publisher CCSHAU