Abstract

The treatment of sugar industrial effluent is an enormous task because of the very high load of turbid-ity, chemical oxygen demand (COD), biological oxygen demand (BOD), total suspended solids (TSS), high or low pH value and oil grease. The polyelectrolyte in conjunction with inorganic coagulant was used successfully for its treatment. Four new polyamine-based cationic polyelectrolytes have been synthesized. These polyelectrolytes were characterized by FTIR, 13 C NMR, 1 H NMR, gel permeation chromatography (GPC), and were exploited in the sugar industry wastewater. Cationicity of polyelectrolytes was also deter-mined, and the polyelectrolytes' efficiency was calculated at different coagulants and flocculants dosages. Based on the result obtained by four polyelectrolytes, it was observed that polyelectrolytes with a 1.5:1 molar ratio of epichlorohydrin: diphenylamine has given the best result in the removal of pollutants from sugar industry wastewater. The result was found to be consistent in all kinds of pollutants of sugar in-dustry suspension with a 1.5:1 molar ratio of epichlohydrin: diphenylamine polyelectrolytes. (c) 2022 Elsevier B.V. All rights reserved.