Diseño del sistema de alcantarillado sanitario de la Zona Especial de Desarrollo Económico del Litoral (ZEDE).

Abstract

The Special Economic Development Zone (ZEDE) of Litoral is located within the ESPOL Campus, covering an area of 131 hectares. A population of 533 people is projected, with a current population of 108. However, the existing sanitary sewer system (AASS) at ESPOL is insufficient to meet the sanitary needs of ZEDE Litoral, whose only available sewer component is a treatment plant (PDAR) that receives wastewater from the Information Technology Center (CTI) building. In this context, the project aimed to design the sanitary sewer system (collection networks and the treatment system) through technical analysis and sustainability criteria to prevent wastewater pollution. The activities carried out included: i) data collection and processing; ii) analysis of the existing PDAR for its repowering; iii) proposal and evaluation of alternatives; iv) system design; v) environmental impact analysis, drawings, operation and maintenance (O&M) manual, budget, and technical specifications. The results include 1.63 km of pipelines with diameters ranging from Ø100 to Ø200 mm, 35 inspection wells, and 155 household connection boxes. For the repowering, the two aeration tanks will be unified (2.5m x 5m x 3.5m) and equipped with 16 fine-bubble diffusers; the clarifier will feature two rectangular modules (1.5m x 4m x 3.5m) with a 1/4 HP pumping system. The sludge digester will be cylindrical, with Ø4.5m and a height of 4.5m, generating 35 kWh/day of energy from biogas production. The reference budget is USD 210.950,72 + IVA. To address environmental considerations, a budget of USD 8,763.21 + IVA is allocated for the construction phase (CAPEX). Therefore, the total value of the project during its construction phase is USD 219.713,93 + IVA, while the O&M expenses are USD 23.730,46 + IVA per year. Keywords: treatment plant, innovative industries, ZEDE Litoral, AASS