PENGARUH PENAMBAHAN EM4 PADA LIMBAH CAIR TAHU TERHADAP BIOGAS

Tofu is a type of food that is no longer foreign to Indonesian people. From the processing process, the waste, in general, solid tofu waste can be used for animal feed. Meanwhile, tofu waste in liquid form is thrown into the waters, resulting in a negative impact on water quality resulting in a foul smell in the river from the liquid tofu waste. Liquid tofu waste can actually be used as biogas energy, but it is very rare because it requires large costs. An independent sole Putra Tofu Factory located at Kp Salakopi RT 02 / RW 12, Dec. Haur Wangi, West Java, which already has biogester tubes from the government program so that tofu liquid waste can be used as biogas, but the biogas produced is less than optimal. Therefore, researchers conducted research by adding 0.2% EM4 to tofu liquid waste, dissolved in a holding pond with a length of 6m, a width of 3m and a water height of 0.1m, so that it had a volume of 1800 liters of tofu liquid wastewater. Testing was carried out from December 10, 2022 to January 21, 2023. The initial test results produced an average pressure of only 0.8 Bar and the average pressure produced after adding EM4 bioactivities was 1.5 Bar. Characteristics of the premix fire produced by tofu liquid waste biogas. blue.

Keywords : tofu liquid wast,biogas