Cassava Starch and Aluminum Sulfate in the Removal of Chemical Oxygen Demand from Water of the Pollo River, Otuzco

Authors

Ramos Pastor, Diego Franklin

Pastor Torres, Ana María del Rosario

Alva Diaz, Luis Enrrique

Abstract

The following article corresponds to the investigation was to evaluate the effect of cassava starch, aluminium sulfate and the mixture in the chemical oxygen demand removal of water from Río Pollo, Otuzco. The chemical oxygen demand of the Río Pollo water was characterized, the analysis was 68.114 ppm, according to the legal standard this value exceeds the Environmental Quality Standards, Category 3 for Vegetable Irrigation and Animal Drinking. Then a treatment with the coagulation - flocculation process was carried out, using cassava starch and aluminum sulfate as coagulant, the jar test equipment was used, in this investigation a completely randomized statistical design was applied with 2 factors (sulfate aluminum and yucca starch) and 4 replicas. The independent variables were cassava starch (14ppm, 16ppm and 20ppm) and aluminum sulphate (25ppm and 35ppm), the coagulation conditions were: time 1 minute and 120 RPM, flocculation conditions 20 minutes and 30 RPM, the sedimentation time of 20 minutes, from the results we have that the treatment with 20 ppm of cassava starch and 25 ppm of aluminum sulfate, has the lowest COD and the best percentage of COD removal; 33.39 ppm and 50.98%, respectively; therefore it is concluded that there was an effect of aluminum sulfate but not of cassava starch and the mixture in the removal of the chemical demand for oxygen from the Pollo River, Otuzco.