Diseño de una planta de tratamiento de efluentes provenientes de una industria láctea mediante procesos de electrocoagulación y filtración

Abstract

An effluent treatment plant from a dairy industry was designed through electrocoagulation and filtration processes with a capacity of 250 m3/day. The plant comprises a pre-treatment step, electrocoagulation and filtration; additionally, the treatment of waste generated was contemplated. The pretreatment consists of a screening system and a static sieve to remove coarse and fine solids. Then, the effluents are homogenized in a 63,6 m3 tank at a pH of 4,5 with a 1 N HCl solution, by automatic control. The electrocoagulation system consists of four electrolytic cells equipped with aluminum electrodes with a volume of 4,04 m3 each. For the filtration of the effluents, there are five silica sand filters where the effluent was achieved complying with the established norms and can be discharged to the sewage system. In addition, a drying bed was designed with an area of 34,6 m2, where the generated sludge will be treated before to its final disposal. An economic evaluation of the project was carried out, obtaining a cost of 56 296,7 USD as investment cost and the cost per cubic meter of treated effluent is 0,90 USD.