Optimization of electrocoagulation process to treat biologically pretreated bagasse effluent | Zendy

K. Thirugnanasambandham | Zendy; V. Sivakumar | Zendy; Maran Prakash | Zendy

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Optimization of electrocoagulation process to treat biologically pretreated bagasse effluent

Author(s) -

K. Thirugnanasambandham,

V. Sivakumar,

Maran Prakash

Publication year - 2013

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc130408074t

Subject(s) - electrocoagulation , response surface methodology , chemical oxygen demand , bagasse , dilution , effluent , electrolyte , pulp and paper industry , chemistry , box–behnken design , total suspended solids , chromatography , environmental engineering , wastewater , electrode , environmental science , physics , engineering , thermodynamics

The main objective of the present study was to investigate the efficiency of electrocoagulation process as a post-treatment to treat biologically pretreated bagasse effluent using iron electrodes. The removal of chemical oxygen demand (COD) and total suspended solids (TSS) were studied under different operating conditions such as amount of dilution, initial pH, applied current and electrolyte dose by using response surface methodology (RSM) coupled with four-factor three-level Box-Behnken experimental design (BBD). The experimental results were analyzed by Pareto analysis of variance (ANOVA) and second order polynomial mathematical models were developed with high correlation of efficiency (R2) for COD, TSS removal and electrical energy consumption (EEC). The individual and combined effect of variables on responses was studied using three dimensional response surface plots. Under the optimum operating conditions, such as amount of dilution at 30 %, initial pH of 6.5, applied current of 8 mA cm-2 and electrolyte dose of 740 mg l-1 shows the higher removal efficiency of COD (98 %) and TSS (93 %) with EEC of 2.40 Wh, which were confirmed by validation experiments

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