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Researcher Digambar, Narale Pradip
Advisor Kothari, Surendra
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Doctor of Philosophy (Ph.D.)
Publisher MPUAT
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Agriculture & related technologies
Subject Keyword Integration ♦ Biogas Plant ♦ Solar Water Heater ♦ Development ♦ Mushroom Drying System ♦ Integration of Biogas Plant and Solar Water Heater For Development of Improved Mushroom Drying System ♦ Agricultural Engineering
Abstract India is a country with variable agro climate and rich in fungal biodiversity. India is a potential major producer of temperate, tropical and subtropical mushroom species. Mushroom is a nutritious product and contains many vitamins and minerals. Mushroom is a highly perishable product therefore it needs immediate processing to increase its storage life. Therefore investigation was done on the design and development of solar-biogas integrated drying system including biomethanation study of spent mushroom substrate. Biomethanation study comprises of lab study of codigestion of spent mushroom substrate and cowdung in different proportions, identification of suitable combination of spent mushroom substrate and cowdung from results of lab study, development of biogas plant suitable for selected combination of spent mushroom substrate and cowdung and to study biogas production from selected combination in the modified biogas plant. From biomethanation study it was found that combination of 25 % spent button mushroom substrate with 75% cow dung (T 6) was found better as compared to all other selected combinations. The total biogas production at STP from T6 was about 6.54 L in 40 days from 200 gm sample. Biogas plant of 2m3 was modified accordingly and the gas produced was measured continuously for 80 days. The average daily biogas production during 80 days of biomethanation period was observed as 1.852 m3/day with substrate temperature varies in the range of 31.5 °C to 37.9 °C. The cumulative biogas production and cumulative biogas production at STP was found to be 148.185 m3 and 130.908 m3 respectively. Solar energy and biogas produced from codigestion of spent button mushroom substrate and cowdung substrate were used for water heating. This hot water was circulated through radiator kept inside dryer. Ambient air was circulated at constant flow rate using air fan over radiator to absorb heat of the hot water flowing through radiator and to dissipate absorbed heat inside dryer for drying of mushroom at constant. temperature. This complete process was optimized in such a way that constant temperature of 50 °C was maintained throughout drying of mushroom. The button mushroom was dried from moisture content of 91% (wb) to 8.257 % (wb) in 11 hours with average solar radiations availability of 560 W/m2 and biogas consumption of 700 L. The oyster mushroom was dried from moisture content of 90% (wb) to 8.41 % (wb) in 10 hours with average solar radiations availability of 578.37 W/m2 and biogas consumption of 600 L. The benefit-cost ratio of the developed system was found to be 1.184 with a payback period of 1.194 years (14 months and 10 days only). It can be inferred that the developed Solar-biogas hybrid drying system was technically as well as economically feasible.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Udaipur
Size (in Bytes) 6.92 MB
Page Count 223