PEMANFAATAN LIMBAH CAIR INDUSTRI GULA RAFINASI SEBAGAI BAHAN BAKU PEMBUATAN ENERGI TERBARUKAN (BIOGAS)

Abstract

Waste liquid of Sugar industry has characteristics of having high organic ingredients. This is indicated bythe value of Chemical Oxygen Demand (COD) around ± 7,000 - 10,000 mg /L, TDS ± 1000 - 2.000 mg /L. The aim ofthis study is to determine the influence of substrate composition (liquid waste of sugar factory, LG) with starter / cowdung (TASI) with composition 50%: 50%; 60%: 40%; 70%: 30%, optimum time of the fermentation process and slurryparameters of COD, VFA, in biodigester to biogas production with good methane gas (flame test). The experimentresults show that the production of biogas in the composition of liquid wastes of the sugar factory (LG: TASI) of 50%:50%, 60%: 40%, and 70%: 30% can produce flame from day-10th to day-14th and a blue flame at a 50%: 50%composition on the day-28th (twenty eighth day), at a composition of 60%: 40% at day-24th (twenty fourth day) and at acomposition of 70%: 30% on day-21th, so the optimum time for biogas production on LG composition: TASI) 50%:50%, 60%: 40%, and 70%: 30% are in the day of 28th, 24th, 21st with biogas product with blue color flame the (whichindicates high levels of methane gas), and the COD slury parameters, VFA in biodigester provide good conditions forbiogas production with blue flame (methane gas).