BIOGAS PRODUCTION FROM THE CO-DIGESTION OF KITCHEN WASTE AND COW MANURE
Tado Gyadi
M.Tech Student, Department of Civil Engineering, NERIST, Nirjuli-791109 (A.P.), India. , IN
Mudo Puming
M.Tech Student, Department of Civil Engineering, NERIST, Nirjuli-791109 (A.P.), India. , IN
Keywords: Anaerobic Digestion (AD); Cow Manure (CM); hydraulic retention time (HRT); Kitchen Waste (KW); Municipal Solid Waste (MSW).
Abstract
Untreated and Unmanaged Kitchen waste from Domestic consumption, Restaurants, Catering services, Universities, etc. when disposed-off to the landfill or discarded to the surroundings then in return it pollute the environment. And methane emitted from their decomposition, contributes to the global climate change. Under MSW (Management and Handling) Rules, 2016 promulgated by MOEF, Govt. of India, these wastes are becoming difficult to manage and dispose-off using traditional means. Due to an increasing urbanization and awareness of the true economic, land scarcity for landfilling and environmental cost of the conventional land filling, recent interest is to develop technologies that can generate biogas from the kitchen wastes because of its high biodegradability and methane yield characteristic.The current project work focuses on the estimation of amount of Biogas generated and Methane and Carbon dioxide content in the biogas by varying the quantity of the Kitchen Waste and Cow Manure in an anaerobic condition. Also to study the continuous variation in the temperature and pH of the reactor throughout
the process. First three Sets of the experiment consisting of Kitchen waste as Set1, cow manure as Set2 and codigestion of Kitchen waste and Cow manure as Set3 were conducted at room temperature. And as per observation, Set3 yielded more biogas in comparison with other two sets. And then further four more Sets of Set3 were tested at a different ratios i.e. (KW:CM, 1:0 for Set1, 1:1 for Set2, 2:1 for Set3 and 3:1 for Set4) to observe the effect of the mixing ratio of Kitchen waste and Cow manure at room temperature and note down the variation of pH and Temperature throughout the process. And it was found that in case of cumulative production of methane, Set 4 gave the maximum value i.e. 318.76 ml and in terms of percentage, Set 2 gave the maximum value i.e. 68.40%. In Set 1, the biogas generation was quite high but the bio methane content was low and carbon dioxide was the prominent gas.
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