Journal of the Serbian Chemical Society 2014 Volume 79, Issue 6, Pages: 743-757
https://doi.org/10.2298/JSC130201053T
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Treatment of egg processing industry effluent using chitosan as an adsorbent
Thirugnanasambandham K. (Department of Food Technology, Kongu Engineering College, Perundurai, Erode, India)
Sivakumar V. (Department of Food Technology, Kongu Engineering College, Perundurai, Erode, India)
Prakash Maran J. (Department of Food Technology, Kongu Engineering College, Perundurai, Erode, India)
The objective of this present study is to investigate the efficiency of
chitosan as an adsorbent to treat egg processing industry wastewater.
Parameters affecting the effluent treatment process such as pH, chitosan
dosage, settling time and initial chemical oxygen demand (COD) concentration
on the reduction percentage of turbidity, COD and biochemical oxygen demand
(BOD) were studied. Optimum condition was found to be pH of 4, chitosan
dosage of 1.1 g L-1 and settling time of 40 min respectively. The maximum
reduction percentage of turbidity, COD and BOD were found to be 94 %, 88 %
and 83 % respectively. The effective adsorption process was confirmed by
FT-IR spectra analysis. The experimental data was analyzed by different
isotherm and kinetic models. Langmuir isotherm type I model was
satisfactorily described the adsorption mechanism and the rate of COD
reduction followed the pseudo-first-order kinetic model. A four factor, three
levels Box-Behnken response surface design was employed to develop second
order polynomial mathematical models from the experimental data.
Keywords: egg wastewater, chitosan, adsorption, isotherms, kinetics, experimental design