Pretreatment of Real Wastewater from the Chocolate Manufacturing Industry through an Integrated Process of Electrocoagulation and Sand Filtration

Autor: Marco A. García-Morales, Julio César González Juárez, Sonia Martínez-Gallegos, Gabriela Roa-Morales, Ever Peralta, Eduardo Martin del Campo López, Carlos Barrera-Díaz, Verónica Martínez Miranda, Teresa Torres Blancas
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: International Journal of Photoenergy, Vol 2018 (2018)
Druh dokumentu: article
ISSN: 1110-662X
1687-529X
72573147
DOI: 10.1155/2018/2146751
Popis: The purpose of this study was to evaluate the efficiency of removal of suspended solids in terms of turbidity, color, and chemical oxygen demand (COD) when integrating the electrocoagulation process using aluminum sacrificial anodes and the sand filtration process as a pretreatment of wastewater from the chocolate manufacturing plant in Toluca, México. Wastewater from the chocolate manufacturing industry used in this study is classified as nontoxic, but is characterized as having a high content of color (5952 ± 76 Pt-Co), turbidity (1648 ± 49 FAU), and COD (3608 ± 250 mg/L). Therefore, enhanced performance could be achieved by combining pretreatment techniques to increase the efficiencies of the physical, chemical, and biological treatments. In the integrated process, there was a turbidity reduction of 96.1 ± 0.2% and an increase in dissolved oxygen from 3.8 ± 0.05 mg/L (inlet sand filtration) to 6.05 ± 0.03 mg/L (outlet sand filtration) after 120 min of treatment. These results indicate good water quality necessary for all forms of elemental life. Color and COD removals were 98.2 ± 0.2% and 39.02 ± 2.2%, respectively, during the electrocoagulation process (0.2915 mA/cm2 current density and 120 min of treatment). The proposed integrated process could be an attractive alternative of pretreatment of real wastewater to increase water quality of conventional treatments.
Databáze: Directory of Open Access Journals
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