PEMBUATAN BIOGAS DENGAN VARIASI STARTER RAGI DAN KOTORAN SAPI BERBAHAN BAKU SAMPAH ORGANIK

Abstract

This study aims to determine the composition of the right starter mixture to produce optimal biogas, knowing the temperature (in digester) at the time of fermentation, knowing the effect fungal growth on the levels of biogas. Processing organic waste in small pieces given water and starter, put in bottle and covered with balloon, last process fermentation 45 days. Then samples tested using Methane Measurement System, Carbondioxide, Humidity and Temperature. Then obtained mixture 10% starter cow dung and 90% organic waste CH₄ 35.79 ppm and CO₂ 1763.34 ppm, 20% cow dung and 80% organic waste CH₄ 12.12 ppm and CO₂ 740.55 ppm, 30% cow dung and 70% organic waste, CH₄ 14.08 ppm and CO₂ 858.87 ppm, yeast 10% and organic waste 90% CH₄ 9.78 ppm and CO₂ 860.98 ppm, 20% yeast and 80% organic waste CH₄ 166.08 ppm and CO₂ 1185.35 ppm and yeast mixture 30% and 70% CH₄ organic waste 16.66 ppm and CO₂ 927.39 ppm. The yeast mixture 20% and 80% organic waste produces most optimal CH₄ with temperature in digester at fermentation 30.11 °C with value 206.76 ppm while mixture 10% cow dung and 90% organic waste produces highest CO₂ at temperature 30.4 °C with value 2527.57 ppm.