Diseño de una planta de tratamiento de agua residual mediante procesos microbiológicos combinados en la Tenería Díaz Cia. Ltda. de la ciudad de Ambato

Abstract

The objective of this experimental research was to design a treatment system for the liming wastewater of the company TENERÍA DÍAZ, which discharges its effluents to the public sewer system, breaching the permissible limits according to the Environmental quality standard and discharge of effluents to the water resource. (Ministerial Agreement 097-A, TULSMA, Book VI, Annex 1, Table 8). According to the periodic characterization reports of wastewater provided by the company, the results of the following parameters were taken as a baseline: pH 12.06, BOD5 2937.11 mg / l, COD 7527.5 mg / l, TSS 450 mg / l, Phenols 1.30 mg / l, Sulphides 288.4 mg / l. The treatment was carried out in a pilot plant built, consisting of five 4-gallon containers. The feed container mainly reduces the pH of the ferric chloride wastewater, for the growth of bacteria. The second and third containers are the anaerobic and aerobic bioreactors, here the inoculum of bacteria is introduced, whose objective is to reduce the organic load of the residual water. For the purposes of oxidation of sulphide ions in the liming wastewater, the air is constantly supplied from a compressor and manganese sulphate is used as a catalyst. The settling vessel precipitates sludge from the bioreactors, and the ascending filter, containing gravel and sand, retains suspended particles in the biologically treated water, obtaining favourable results, in the final analysis, managing to bring the values established by the regulations with removals greater than 95% in the parameters treated with this method, developing a viable method in the treatment of liming wastewater from pellets and carrying out the engineering calculations, a WWTP was designed, in accordance with the company's requirements, recommending to comply with the technical specifications that the operation of this type of WWTP requires.