Evaluación del porcentaje de remoción de colorante negro reactivo 5, en aguas residuales del curtido de pieles, utilizando 2 hongos lignolíticos.

Abstract

This investigative work evaluated the percentage of removal of the reactive black dye 5 from the wastewater of the ESPOCH Piece Tanning Laboratory using 2 lignolite fungi. Treating the strong coloration of the reagent black dye residues 5 (CNR5) that impart the discharge media, eliminating the photosynthetic processes in the water courses, using the white rot fungi: Pleurotus ostreatus y Aspergillus niger species, that are characterized by the ability to remove dyes. Two treatments were established at three different concentrations of CNR5 of 100,150,200 ppm: P (Pleurotus ostreatus + Waste water), A (Aspergillus niger + Waste water), and a control with residual water without inoculation of spores, Pleurotus ostreatus immobilized in Luffa cylindrical y Apergillus niger in solution of spores adjusting a concentration of 3x10⁶ spores / ml, each treatment was made three times, total of 27 experimental units; the experimental time was 18 days and the CNR5 concentration was controlled at 1.9.18 days. After the experiment was finished, the following were measured: chemical oxygen demand (COD), biological oxygen demand (BOD), total solids (SS), dissolved oxygen (DO). Treatments P6 and A1 reduced the reactive black dye 5 in 90.93% and 88.45% respectively, showing that P6 had a greater reduction in the CNR5 concentration. Therefore, the use of these fungi is a viable alternative for the treatment of wastewater from leather tanning, I recommend using other plant residues that have significant amounts of lignin.