Clarificación de un agua residual de una industria láctea mediante coagulación con Tuna (Opuntia ficus indica)
Clarification of a dairy wastewater by coagulation using Tuna (Opuntia ficus indica)
Resumen
The use of natural coagulants emerges as an ecological alternative for both domestic and industrial wastewater treatment. The present work investigates the clarification of a wastewater from a dairy industry, in the province of Pastaza, Ecuador, using prickly pear cactus (Opuntia ficus indica) as a natural coagulant agent. It was studied the coagulation in samples of one litre of wastewater through a standard jar testing equipment, modifying the coagulant concentration (1-2 w%) and volume of coagulant (5-35 ml). The parameters analyzed were turbidity, color, chemical oxygen demand (COD), biological oxygen demand (BOD), suspended solids (SS), total solids (ST) and fecal coliforms (FC). It was found that the optimal dosage was 20 ml of coagulant solution at 2% (400 ppm). The removal efficiencies found were 77.8% in turbidity, 51.8% in color, 26.8% in COD, 13.9% in BOD, 31.0% in SS, 26.4% in ST and 99.96% in CF. The results show that the prickly pear cactus (Opuntia ficus indica) can be used as pretreatment of wastewater from a dairy industry.
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