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Biogas production for Organic Waste Management: A Case Study of Canteen’s Organic Waste in Solid Waste Management Technical Support Center, Lalitpur
Sandila Shrestha

Last modified: 2017-09-12


Management of solid waste is one of the major challenges faced by the municipalities of Nepal. Solid waste mainly comprises of higher percentage of organic waste (food leftover). Management of organic waste minimizes the challenge to manage solid waste. This study was carried out to assess the production of biogas from canteen’s organic waste as a solution for management of organic waste in Solid Waste Management Technical Support Centre, Lalitpur using innovative urban biogas plant (Jeeban’s model) of 1,275 litres for 48 days. The physicochemical parameters of canteen’s waste and bio-slurry were analyzed. Similarly, volume of biogas, volume of methane and carbon dioxide in biogas produced were measured and CO2 reduction from biogas plant was identified. Shapiro-Wilk normality test and simple linear regression were performed using R-programming. The average values of physicochemical parameters of canteen’s waste lied within the optimum range for biogas production. The biogas plant produced 22.03 litres/kg and 120.47 litres/day of biogas. The produced biogas contained 48.89% methane and 39.11% carbon dioxide on average. The research biogas plant could reduce 4.41 tonnes of CO2 equivalent per annum from 262.50 kg of waste fed during the study. The good value of NPK of bio-slurry indicated bio-slurry as a better fertilizer. Shapiro-Wilk test showed that the p-value of collected data were greater than 0.05 indicating normal distribution and linear regression between ambient temperature and biogas production showed significant relationship between them. These results indicated that biogas production using innovative urban biogas plant is better solution for organic waste management.

Keywords: innovative urban biogas plant, CO2 reduction, bio-slurry

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