PENGARUH JUMLAH BAKTERI METHANOBACTERIUM DAN LAMA FERMENTASI TERHADAP PROPORSI GAS METANA (CH4) PADA PENGOLAHAN SAMPAH ORGANIK DI TPA SUWUNG DENPASAR

ABSTRACT A research has been conducted to find out the effect to the amount of methanobacterium bacteria and' fermentation duration toward proportion of methana (CHn) at organic waste processing at TPA Suwung Denpasar. Methana gas produced from this organic waste wiil be processed become fuel of electric generation. From this study will be expected to get all methana gas that contained at the waste so that there is no methana gas loss to the ut*osph""". nti. study was conducted by using 4 treatments that are without bacteria(B0),bacteriawithnumberofpopulation 106 CFU/ml(I}1),bacteriawithpopulationof 10?CFU/ml (B2), and bacteria with population of rir, Cn'Ulmt (B3). Each treatment conducted thrice (3) repeat. The four treatments conducted -"u".r""*unt of gas variable after fermentation during 0 week, 3 weeks, 5 weeks, 7 weeks and g weeks by trisng gas analyzer GA 2000 Geotech. Data from study result then analyzed by using complicated factoriaidesigi &,ef,l. From ANOVA analysis shows there was significant bacteria number and fermentation duration toivard proportion or procentage of methana gas resulted. The longer fermentation time takes place, the bigger the proportion of the methane gas produced. However, the greater number of the bacteria population doIJ not ul*ay" produce bigger proportion of rnethane gas To find out the combination which could give best effect the researcher used Duncan test. The result of analysis from Duncan shows that combination at the ninth weeks by number of bacteria 10? CFU/ml giving best result that was percentage of methana gas is 55,10%. I(eywords: Methanobacterium, Fermentation duration, Organic waste, N{ethana, TPA Suwung'