Analisis Limbah Cair Industri Tahu Sebelum Dan Sesudah Penggunaan Konsorsium Effective Microorganism 4 (EM4)

There are many tofu factories in Indonesia and this causes a lot of waste to be generated. On average, tofu factories are unable to process waste, so the waste produced is thrown directly into the environment without processing, so it can pollute the environment. Liquid waste processing can be done simply, namely by bioremediation using EM4. This research aims to compare between control treatments, EM4 7.5% and EM4 15% in the processing of industrial tofu liquid waste. The research method used True Experiment Design and Completely Randomized Design (CRD), with 3 treatments namely P1 (control), P2 (EM4 7.5%), and P3 (EM4 15%). Each treatment was repeated 7 times. The research parameters measured were pH, BOD, COD, and TSS before and after treatment. The results of the data obtained during the observation were analyzed using the ANOVA test then tested by LSD test. The research results showed that there were differences in bioremediation after using Effective microorganism-4 (EM4) in the control treatment, EM4 7,5% and EM4 15%, but it was not yet effective in reducing BOD, COD and TSS levels in tofu wastewater. The treatment has not been effective because the remediation results still did not meet the quality standarts in East Java Governor Regulation No 52 of 2014. Keywords: tofu wastewater, EM4, BOD, COD, TSS.