Performance evaluation of polysaccharides eluated from Cyamopsis tetragonolobus (guar gum), as a natural coagulant, in the treatment of paint industry effluent

摘要

The performance of Cyamopsis tetragonolobus (guar gum) as a natural coagulant was examined in the treatment of paint industry effluent (PIE). The treatment was performed in the six stirrer arrangement jar test apparatus with base floc illuminator. The efficacy of the coagulant was confirmed through color and turbidity removal. The operational variables are eluent type (deionized water, NaCl, KCl), eluent concentration (1-5 N), coagulant dose (1-6 g), Coagulant-eluate volume (20-120 mL), initial pH (6-10) and initial effluent concentration (3,100-7,693 mg/L). From the results of this study, the optimized conditions to treat a litre of PIE was observed as 100 mL of coagulant-eluate extracted using 1 N KCl and 5 g of guar gum at its actual pH. The results revealed that the Cyamopsis tetragonolobus confirmed its coagulant ability in the treatment of PIE and it could act as better replacement for chemical coagulants.