ABSTRACT

The focus of the research paper is to investigate the importance of biogas as an alternative energy sources. A survey was done to ascertain the amount of biogas that can be generated from various feed stock. A practical laboratory scale experimental design using kitchen and garden waste and effects of Alkaline [NaOH] on the volume of biogas generated. Results obtained revealed a high volume of gas generated when the operating conditions inside the digester is maintained at moderately alkaline condition. Further findings also reveal that the digester temperature remained within the range of 32oC to 35°C throughout the period of experimentation.

There was a digester tank of capacity 20 litre for decomposition of cow dung slurry and fruit waste. Two additives that are KOH and NaOH were used to make the buffer solution. Urea was added to increase the production of biogas. The fruit waste is grinded properly in so that the surface area of slurry is increased and material will easily decompose in short time.

This work can solve the problems of kitchen waste management as well as bring the fulfilment of energy requirement in terms of Biogas and optimization of biogas. The volume of the digester was 20 litres. The solid waste of 9kg was used which comprised of 5kg Cow dung, 2kg Fruit Waste, 2kg garden waste and100 gm of  KOH. The remaining space in the digester was filled with water. The parameters of total solid, Volatile solid, Non Volatile Solid at inlet and outlet slurry were calculated. The values obtained were 34.66, 77.23, and 22.77 in percentage.

Key Words: Biogas, KOH, NaOH, Eco-Friendly.