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.