Diseño de un Sistema de Tratamiento de Aguas Residuales de las líneas del proceso en la Planta de Lácteos Paraíso del cantón Salcedo.

Abstract

A waste water treatment system from Paraíso dairy processing plant was designed at Salcedo Canton un Cotopaxi province, in order to comply with environmental regulations of effluent varies during the day, then was used a composite sample of small individual samples which were collected over 10 hours, by the characterization of the samples it identified the following parameters which are outside the allowable range in the Environmental Quality Standard effluent discharge: Water, Book VI, Annex I: chemical oxygen demand, biochemical oxygen demand, oil and grease, total phosphorus, total nitrogen, suspended and total solids. Treatability test were carried out for a high load effluent with biodegradable organic matter by a biological system, which promotes the decomposition of the organic material. Finally the respective equipment to the treatment system was sized according to the results of biological degradation from the effluent taking: channel bars, grease trap, aeration tank and secondary sedimentation tank. The flow measured by 7 consecutive days by the volumetric method was identified as a flow average of 1,93 m3/h. the validation was proof by characterization or wastewater collected after the treatability test and removal percentages or the parameters are: chemical oxygen demand 96,7%, biochemical oxygen demand 96,9%, oil and grease 94,3%, total phosphorus 93,5%, total nitrogen 90,5%, suspended solids 94,0% and total solids 59,6%. Paraíso dairy with this proposed treatment system will comply with environmental law to discharge the wastewater in the public sewer. It is recommended regular cleaning of equipment and place sludge drying.