The Effect of Extract Tannins from Spent Coffee Ground on Waste Water Treatment

Abstract Green extraction processes to obtain high value bioactive compounds from raw natural materials and wastes has gained attention the past few years. In present study, we investigated a Natural Deep Eutectic Solvent derived two products, namely choline chloride glucose as potential solvent for of tannin spent coffee ground(SCG). A was used coagulant with Poly aluminium chloride(PAC) flocculant. Initially, jar test experiments were conducted varying dosage initial pH. Next, tests carried out different values PAC dosage, flocculation time well sedimentation find optimum condition colour removal. The supernatant layer treated leachate each analysed colour, pH conductivity. At 5, 3 minutes 10 resulted in highest removal (81.8%) at 100 mg/L, 1 mg/L being added. Coagulation system tannin-based flocculant showed promising result decolourisation wastewater.