UTILIZATION OF FOOD PROCESSING WASTE FOR THE PRODUCTION OF BIOGAS AND ENERGY GENERATION
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Date
2020-11-09
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University of Agricultural Sciences GKVK, Bangalore
Abstract
The present study was undertaken to investigate the utilization of food processing waste for the production of biogas and energy generation in INDUS Bio Product plant. For investigation of biogas and energy generation, the food waste coming out of the plant namely wastes of carrot, tomato, gherkins, watermelon, papaya, jamun, rasgulla, nippattu and cooked food were collected. The physico-chemical characteristics of the food waste namely moisture, total solids, volatile solids, pH, carbon, nitrogen and carbon: nitrogen were investigated in order to study the biogas production. Characteristics of the food waste by keeping the food waste in anaerobic condition and the gas production was monitored and recorded for every week up to two months. Further, the biogas plant located at Indus bio plant was evaluated in order to check its performance by recording the volume of biogas production by feeding eight tonnes of selected food waste. The daily gas production was recorded for duration of three months and the average daily gas production 561.47 m3 was observed. The maximum gas production of 581 m3 was recorded at a temperature of 34˚C and this was further purified by removing the CO2 and H2S using water scrubbing. An average of 645 kWh of electricity was generated out of the produced purified gas and used for various purposes. It was concluded that the plant was economically viable and environmentally suitable with a payback period of 2.1 year. Keywords: Food processing waste, anaerobic digestion, biomethane characteristics, biogas production, water scrubbing, and electricity generation