Electrocoagulation and activated carbon-adsorption of mocaf (modified cassava flour) wastewater

Abstract

Mocaf (modified cassava flour) is flour made from cassava through a microbial fermentation process. Mocaf wastewater has high pollutants, so it needs to be processed before being discharged into the environment. This study aims to treat wastewater of mocaf using a hybrid method: electrocoagulation combined with adsorption. The electrocoagulation process used solar cell electric current. The electrode used aluminium with a distance of 3 cm. The time process of electrocoagulation is 30 minutes. The adsorption process used activated carbon commercials. The concentration of the adsorbent is 3, 5, and 10 g/L. The time process of adsorption is 9 hours with sampling times of 1, 3, 6, and 9 hours. The analysis carried are COD, TDS, TSS, pH. The hybrid method of electrocoagulation and adsorption using activated carbon commercial adsorbent had an efficiency of COD removal up to 47,27% (3863 mg/L), optimum pH of wastewater mocaf 8,295; TDS 846 mg/L; TSS 500 mg/L on concentration adsorbent ten g/L and 6 hours adsorption time. The hybrid method of electrocoagulation and adsorption could reduce pollutants in mocaf wastewater and the result under the quality standard of pH, TDS, and TSS.