Evaluación del uso de la chlorella vulgaris en la remoción de cromo hexavalente, demanda química del oxígeno en aguas residuales de industrias papeleras a nivel de laboratorio
Fecha
2018
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Universidad de Guayaquil, Facultad de Ingeniería Química
Resumen
En el estudio realizado se investigó la evaluación del uso de la Chlorella Vulgaris en la remoción de Cromo Hexavalente, Demanda Química de Oxigeno en aguas residuales de industrias papeleras a nivel de laboratorio, para lo cual se establecieron dosificaciones y se evaluaría las condiciones y parámetros (pH, Cr(VI), DQO) con la finalidad de determinar la dosificación optima y obtener el porcentaje de remoción de DQO y Cr (VI) de acuerdo con las normas ambientales estipuladas. Durante la experimentación se realizaron dosificaciones y la mejor dosis fue 85% de agua residual y 15% de microalga Chlorella vulgaris, el cual se controló el recuento de la densidad de la Chlorella vulgaris, la tasa de crecimiento, porcentaje de remoción del DQO, pH y el porcentaje de remoción del Cr (VI), obteniendo valores positivos, se procedió a realizar una réplica de la mejor dosis y así realizar un promedio del primer y segundo tratamiento realizado al agua residual. Obteniendo una concentración de DQO 106 mg/l con un porcentaje de remoción del 98,11 y una concentración de Cr (VI) 0,015 mg/l con un porcentaje de remoción del 83,51 y por último un pH de 8.40. Por lo tanto, se concluyó que el uso de la Chlorella vulgaris en tratamientos de aguas residuales cumple con la capacidad de remover contaminantes presentes y obtener excelentes resultados.
In the study carried out, the evaluation of the use of Chlorella Vulgaris in the removal of Hexavalent Chromium, Chemical Oxygen Demand in wastewater from paper mills at the Laboratory level was investigate, for which dosages were established and the conditions and parameters would be evaluated (pH, Cr (VI), COD) in order to determine the optimal dosage and obtain the percentage of COD and Cr (VI) removal in accordance with the environmental standards stipulated. During the experimentation, dosages were carried out and the best dose was 85% of residual water and 15% of Chlorella vulgaris microalgae, which controlled the density of Chlorella vulgaris, the growth rate, percentage of COD removal, pH and the percentage of removal of Cr (VI), obtaining positive values, we proceeded to replicate the best dose and thus perform and average of the first and second treatment performed on wastewater. Obtaining a concentration of COD 106 mg/l with a percentage of removal of 98,11 and a concentration of Cr (VI) 0,015 mg/l with a percentage of removal of 83,52 and finally a pH of 8,40. Therefore, it was concluded that the use of Chlorella vulgaris in wastewater treatment meets the ability to remove contaminants present and obtain excellent results
In the study carried out, the evaluation of the use of Chlorella Vulgaris in the removal of Hexavalent Chromium, Chemical Oxygen Demand in wastewater from paper mills at the Laboratory level was investigate, for which dosages were established and the conditions and parameters would be evaluated (pH, Cr (VI), COD) in order to determine the optimal dosage and obtain the percentage of COD and Cr (VI) removal in accordance with the environmental standards stipulated. During the experimentation, dosages were carried out and the best dose was 85% of residual water and 15% of Chlorella vulgaris microalgae, which controlled the density of Chlorella vulgaris, the growth rate, percentage of COD removal, pH and the percentage of removal of Cr (VI), obtaining positive values, we proceeded to replicate the best dose and thus perform and average of the first and second treatment performed on wastewater. Obtaining a concentration of COD 106 mg/l with a percentage of removal of 98,11 and a concentration of Cr (VI) 0,015 mg/l with a percentage of removal of 83,52 and finally a pH of 8,40. Therefore, it was concluded that the use of Chlorella vulgaris in wastewater treatment meets the ability to remove contaminants present and obtain excellent results
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Chlorella vulgaris, Agua residual, Tratamiento de agua, Industria papelera.