Análisis de la grava como filtro en el tratamiento de aguas residuales provenientes de la industria florícola La Herradura Floherrer S.A. ubicada en el cantón Salcedo

Abstract

The present experimental project was carried out in the flower industry La Herradura Floherrer S.A. located in the canton of Salcedo, in order to assess the efficiency of the gravel in the treatment of industrial wastewater, the experimental time was 90 days, where the daily flow of waste water from the industry of 4500 was determined lt / day, when evaluating the unfiltered residual water, the following results were obtained: 875 mg / l of COD, 420 mg / l of BOD5 and 0.003 mg / l of chromium. The operation of the gravel filter was constant, by means of the calibration of the residual water flow that entered the filter of 0.105 lt / min, during the 90 days of evaluation, in which samples of filtered residual water were taken every 10 days to determine the filtering capacity that the material was provided, and knowing well when the material had stopped purifying the wastewater. After filtering the residual water of the floriculture industry for 90 days, evaluating the results, the maximum efficiencies of removal of the filtering material were obtained: 87.43% in the removal of COD, 88.47% in the removal of BOD5 and it was determined that the presence Chromium in the wastewater industry was minimal. Through the results obtained it was possible to determine the optimum time of useful life of the filter ing material, being that during the first 30 days of operation the filtered water complies with the values allowed in the regulations, so that the gravel can be used as filtering materia l in the treatment of wastewater from a floriculture industry for a period of 30 days, after which the filtering material (gravel) must be replaced by a new one, previously washed, to remove particles of granular material from smaller size.