Treatment of sugar industry effluent using electrocoagulation process: Process optimization using response surface methodology

Shreyas Gondudey, Parmesh Kumar Chaudhari, Sandeep Dharmadhikari, Raghwendra Singh Thakur

Abstract


Wastewater of sugar industries has high pollutant load due to presence of organic and inorganic materials. Discharge of untreated or partially treated wastewater has negative effect on environment and on life of human, plants and animals. In our present studies, it is attempted to treat sugar industry effluent (SIE) by electrocoagulation process (ECP) using mild steel (MS) as electrode material. For this purpose, three process parameters namely pH (5-9), current density (j = 34.7-104.46 A m-2) and treatment time (tR = 20-100 min) were selected to optimize process using response surface methodology (RSM). The optimum conditions were pH 6.66, j = 105.16 A m-2 and tR 100 min. The maximum chemical oxygen demand (COD) removal of 75.98 % was achieved from the optimum conditions. The predicted model by RSM showed R2 = 0.9515. After treatment of effluent, the sludge content in treated water was separated effectively by filtration and settling.


Keywords


Chemical oxygen demand; total dissolved solids; filtration; sedimentation; current density

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DOI: https://doi.org/10.2298/JSC200319037G

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