Simultaneous optimization of multiple performance characteristics in coagulation-flocculation process for Indian paper industry wastewater

The goal of this study was to optimize the coagulation-flocculation process in wastewater generated from the paper and pulp industry using a grey relational analysis (GRA)-based Taguchi method. Process parameters included types and doses of natural coagulants and coagulant aid, and pH. To track the...

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Published in:Water science and technology 2012-01, Vol.66 (6), p.1231-1238
Main Authors: Saraswathi, R, Saseetharan, M K
Format: Article
Language:English
Subjects:
Chemical oxygen demand
Chemical Precipitation
Coagulants
Coagulation
Dissolved solids
Flocculation
India
Industrial Waste - analysis
Models, Chemical
Optimization
Oxygen requirement
Paper industry wastes
Parameters
Process parameters
Pulp & paper industry
Pulp mill effluents
Removal
Taguchi methods
Total dissolved solids
Turbidity
Variance analysis
Waste Disposal, Fluid - methods
Wastewater
Water Pollutants, Chemical - chemistry
Water Purification - methods
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creator Saraswathi, R
Saseetharan, M K
description The goal of this study was to optimize the coagulation-flocculation process in wastewater generated from the paper and pulp industry using a grey relational analysis (GRA)-based Taguchi method. Process parameters included types and doses of natural coagulants and coagulant aid, and pH. To track the efficiency of the treatment process, the following responses were chosen for optimization: chemical oxygen demand (COD), total dissolved solids (TDS) and turbidity of wastewater, alone or in combination or all together. Analysis of variance showed that the type and dose of the coagulant aid were the most significant parameters, followed by pH and the dose of the coagulant; the type of coagulant used was found to be insignificant in the coagulation-flocculation process. Optimization of process parameters to achieve lower turbidity and greater removal of COD and TDS was verified in a separate confirmatory experiment, which showed improvements in COD and TDS removal and a decrease in turbidity of 8.2, 6.35 and 26.17%, respectively, with the application of the Taguchi method and GRA.
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identifier ISSN: 0273-1223
ispartof Water science and technology, 2012-01, Vol.66 (6), p.1231-1238
issn 0273-1223
1996-9732
language eng
recordid cdi_proquest_miscellaneous_1434028388
source Alma/SFX Local Collection
subjects Chemical oxygen demand
Chemical Precipitation
Coagulants
Coagulation
Dissolved solids
Flocculation
India
Industrial Waste - analysis
Models, Chemical
Optimization
Oxygen requirement
Paper industry wastes
Parameters
Process parameters
Pulp & paper industry
Pulp mill effluents
Removal
Taguchi methods
Total dissolved solids
Turbidity
Variance analysis
Waste Disposal, Fluid - methods
Wastewater
Water Pollutants, Chemical - chemistry
Water Purification - methods
title Simultaneous optimization of multiple performance characteristics in coagulation-flocculation process for Indian paper industry wastewater
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