Perbandingan Zat Penyusun Dalam Pemanfaatan Limbah Cair Tahu Sebagai Energi Alternatif Biogas

Waste Solid and liquid in production is disturbing to the humans. Production tofu in Kediri use traditional methods, so the level of efficiency in the use of resources is low and the level of waste production is high. Bioenergy is a source of energy produced by biological resources such as plants, vegetable oils, and livestock and agricultural waste. The type of energy produced is gas, liquid, or solid form. The energy can be used to produce heat, motion, and electricity, depending on the needs. Biogas is a gas mixture produced from the activity of methanogenic bacteria under anaerobic conditions or fermentation of organic materials. Biogas is a product of anaerobic degradation of organic substrates. Because this process uses the performance of a mixture of microorganisms and depends on various factors such as temperature, pH, hydraulic retention, C: N ratio and so on, so this process runs slowly. This study aims to determine the comparison of constituents in the utilization of tofu waste water production as an alternative biogas energy. To make biogas tools used include: Digester and manometer. The raw material used for the first composition is 30 liter first tofu liquid waste with 50 ml Em4 and 2 liter coconut water. As for the second composition, the first liquid tofu waste is 30 liters with 50 ml Em4 and 500 ml molasses. Data was taken for 14 days with observations made every day. From the results of the normality test, it was found that the both of data were normally distributed. While the homogeneity test results, it is stated that the data are homogeneous. Because what is compared is 2 data, it is sufficient to use the T-Test. T-Test results show that the second composition is better than the first composition. So it can be concluded that making biogas from liquid waste added with molasses gives better results than making biogas from tofu liquid waste added with coconut water. Keyword: coconut water, biogass, Em4, waste liquid of tofu, molase.