Optimization of the Coagulation-flocculation Process Using Ferric Chloride and Phosphate for the Reduction of Contaminants in the Slaughterhouses Wastewater

Authors

  • A.W. Pilco- Nuñez Universidad Nacional de Ingeniería, Faculty of Chemical and Textile Engineering, Av. Túpac Amaru 210, Lima, Perú
  • K.M. Zevallos Palacio Universidad Nacional del Callao, Faculty of Environmental Engineering and Natural Resources, Av. Juan Pablo II 306, Bellavista, Callao, Perú
  • A.Z. García Campos Universidad Nacional del Callao, Faculty of Environmental Engineering and Natural Resources, Av. Juan Pablo II 306, Bellavista, Callao, Perú
  • J.A. Flores Salinas Universidad Nacional de Ingeniería, Faculty of Chemical and Textile Engineering, Av. Túpac Amaru 210, Lima, Perú
  • J.A. Montaño Pisfil Universidad Nacional del Callao, Faculty of Electrical and Electronic Engineering, Av. Juan Pablo II 306, Bellavista, Callao, Perú
  • R.E. Solis Farfan Universidad Nacional del Callao, Faculty of Electrical and Electronic Engineering, Av. Juan Pablo II 306, Bellavista, Callao, Perú
  • S.A Trujillo Perez Universidad Nacional del Callao, Faculty of Chemical Engineering, Av. Juan Pablo II 306, Bellavista, Callao, Perú
  • A. Arroyo- Paz Universidad Tecnológica del Perú, Faculty of Engineering, Av. Tacna y Arica 160, Arequipa, Perú.
  • J.A. Poma García Universidad Cesar Vallejo, Faculty of Engineering and Architecture, Av. Larco 1770, Trujillo 13001, Perú

DOI:

https://doi.org/10.15379/ijmst.v10i3.1754

Keywords:

Ferric Chloride, Coagulation-flocculation, Wastewater, Slaughterhouse, Optimization

Abstract

In this work, the coagulation-flocculation process was optimized using ferric chloride and phosphate for the reduction of pollutants in the wastewater from the Conchucos S.A., Lima. Parameters were measured in percentage reduction of chemical oxygen demand (COD), turbidity (NTU) and total phosphorus (PT mg/L), adding ferric chloride as coagulant and potassium dihydrogen phosphate as flocculant. The effects of four independent variables were investigated: ferric chloride dose (500-700 ppm), phosphate dose (700-900 mg/L), fast agitation speed (250-320 rpm) and slow agitation speed (90-100 rpm). The experimental data were optimized by the response surface method using a central composite design. The results show that the statistical models obtained F-values of 3.33, 4.27 and 4.16 for the percent reduction of COD, turbidity and total phosphorus, respectively. Furthermore, the statistical models developed to predict the responses were confirmed by significant probability values (p<0.05). On the fit of the models, an R2 of 0.61, 0.66 and 0.67 are shown for COD, turbidity and total phosphorus percentage, respectively. The optimum conditions were found experimentally at 700 ppm of ferric chloride dose, 900 ppm of phosphate, 320 rpm fast speed and 100 rpm for a reduction of 75.46% of COD, 83.47% of turbidity and 44.08% of total phosphorus presenting a desirability of 0.7.

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Published

2023-08-28

How to Cite

[1]
A. P.-. Nuñez, “Optimization of the Coagulation-flocculation Process Using Ferric Chloride and Phosphate for the Reduction of Contaminants in the Slaughterhouses Wastewater”, ijmst, vol. 10, no. 3, pp. 1536-1547, Aug. 2023.

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