Curepto Wastewater Treatment Plant Improvement

Description: Curepto Sewage Treatment Plant Improvement Domestic water treatment plants that serve a population equal to or greater than 2,500 inhabitants This Project corresponds to the improvement of the Curepto Sewage Treatment Plant (PTAS) and has as its The objective is to expand the capacity of the WWTP considering the projected demand for the year 2034, which is estimated at a served population of 4,894 inhabitants. For this, it is necessary to modify the Project "Construction of the Curepto Sewage Treatment System", favorably qualified through RE No. 143 of July 16, 2002 by the Regional Environmental Commission of the Maule Region ( hereinafter, RE No. 143/2002). Modifications associated with the treatment of sludge and improvements were made to the original project, presented through an Environmental Impact Statement and Pertinence Consultation for admission to the SEIA, respectively, resolved through the documents indicated below. - RE N° 96/2004 qualifies environmentally favorable "Modification of the Curepto Wastewater Treatment System Construction Project". - Of. Ord. No. 373 indicates that improvements to the Curepto Commune Sewage Treatment Plant project do not require mandatory entry into the SEIA prior to its execution. Currently, the Wastewater Treatment Plant consists of a compact pretreatment, followed by a secondary treatment of activated sludge, made up of an aerated reactor and a settler, with recirculation and purging of sludge, and finally a contact chamber for effluent disinfection. . The effluent from the plant is discharged to the Lien Estuary in compliance with the limits established in Table No. 1 of Supreme Decree No. 90/2000 MINSEGPRES, corresponding to the maximum limits allowed for the discharge of liquid waste into fluvial bodies of water. On the other hand, the sludge generated in the system goes through a process of thickening, aerobic digestion and dehydration through drying beds. The modifications to the PTAS subject to environmental evaluation consist, mainly, of increasing the treatment capacity of the biological reactor through the transformation of the current thickener/sludge digester into a reactor. The current settler will be transformed into a sludge digester, for which a new settler will be built which will have a RAS-WAS sludge chamber and a foam chamber. This new configuration will allow the treated effluent to continue complying with the limits established in Table No. 1 of Supreme Decree No. 90/2000 MINSEGPRES. As part of the Project, the modification in the water line is contemplated, associated with the construction of a contact chamber. In the sludge line, meanwhile, a dynamic thickener and a screw-type dewatering system will be implemented. Among the complementary works, there is the replacement of electrical panels, the existing generator group is replaced by one of 150 kVA and the generator room is modified to house it, the internal sewage system is modified, 2 blowers will be incorporated for the aerobic digester , the path for vehicles within the plant is redesigned and a hazardous waste warehouse will be built. The objective of the Project is to expand the capacity of the Curepto Sewage Treatment Plant, in order to ensure the treatment of sewage generated by the population served, which is estimated to grow by 2034 to 4,894 inhabitants.