Analisis Kelayakan Pengembangan Biogas Sebagai Energi Alternatif Berbasis Individu dan Kelompok Peternak
Implementation of integrated cow system with biogas technology approach is one of efficient technology for cow waste treatment. The technology is using available natural microorganism to compose and process various organic matters on anaerobe condition. This will produce methane gas (CH4) and carbon dioxide (CO2) and qualified liquid and solid organic manure. The methane gas (CH4) can be use as gas fuel (BBG). Biogas production may contribute to sustainable agriculture as renewable resources and environmental friendly. The research was aimed to analyze feasibility of biogas as alternative energy sources on farmer’s individual and group basis. Particularly, the research’s objectives are : (a) to study waste treatment performance with biogas installation at research’s site; (b) to analyze feasibility of biogas development as alternative energy sources on farmer’s individual and group basis; (c) to analyze sensitivity of biogas development on cost component and the benefit to treat waste at four different sites; (d) to identify intern and extern affecting that affect of biogas installation; and (e) to determine appropriate alternative strategy in the biogas installation development for farmer. The biogas reactor can be constructed both by cement and fiberglass. Biogas reactor from fiberglass is more effective and produces higher and better gas. Study at the four locations both on individual and group basis by using liquid and solid organic manure are contribute to increase farmer’s income. Result of financial feasibility analysis with biogas digester capacity 5 m3 and 17 m3 and interest rate 17% shows that biogas installation project is feasible to be implemented and developed. Investment cost to construct biogas installation is Rp 19.800.000. Financial feasibility criteria for NPV individual biogas and 30 years project life are Rp 35.173.048, B/C ratio (2,018) and IRR (31%). Feasibility criteria for NPV group biogas and 30 years project life is Rp 259.882.871, B/C ratio (3,787) and IRR (60%). According to the calculation of switching value, the project is sensitive on variable cost and selling price changing in the revenue.