Preliminary Study On Hotel Food Waste As Potential Feedstock For Biogas Production At Kollam District,Kerala

摘要

Municipal Solid Waste (MSW) management is a major problem faced by our society. Data collection studies shows that hotel waste forms a major proportion of MSW. The current work focuses on survey, quantity of generation of waste per day, analysis and characterization of feedstock proposed for generating biogas. The substrates selected were vegetable waste and food waste from hotels. Parameters included Moisture, Total Solids(TS), Total Volatile Solids(TVS), carbon, nitrogen, phosphorus and Chemical Oxygen Demand(COD). Percentage of Moisture content, Total Solids and Total Volatile Solids were 85 and 78; 10 and 30; 8s8 and 95 for vegetable and food waste respectively. Percentage of Carbon, Nitrogen and Phosphorus in vegetable and food waste ranged from 30-90, 45-70; 1. 25-1, 1; 0. 09-0. 32, 0. 01-0. 08 respectively. COD values ranged from 227-3043 mg/kg for vegetable waste and 561-1117 mg/kg for food wastes. Flask level anaerobic digestion experiments using varying amounts of hotel waste, influence of temperature on volume of biogas produced and optimum ratio of vegetable: food waste for biogas generation were conducted. The biogas yields from hotel waste have been determined using batch anaerobic digestion tests for a period of 24 hours at 37°C. The biogas was collected and measured by water displacement method. Crushed hotel waste(vegetable waste: food waste) at a ratio of 1: 4, with 10% inoculum generated 80 ml, 110 ml, 150 ml of biogas from lg, 3g and 5g of substrate approximately. pH was maintained at 7. Biogas production at 45°C and 55° C was also measured and the results clearly shows that there was a significant increase in biogas production with increase in temperature.The results confirm the high potential of hotel wastes which can be used as a substrate for Anaerobic Digestion.