Description
This project consisted of the development of the Technical, Economic, Social, and Environmental Study (TESA) in which the implementation of a comprehensive basic sanitation system was carried out for the population of San Julián, given the previous non-existence of sanitary sewerage services and Wastewater Treatment Plant (WWTP). Our technical and strategic contribution included: Detailed Technical Design of the Sewerage System: A sanitary sewerage network with an extension of 84,696.01 meters was designed, including collectors. The system includes 4,484 household connections and the inclusion of four pumping stations to optimize the flow of wastewater. The infrastructure is expected to benefit an initial population of 20,781 inhabitants (2016), with a design capacity for 29,503 inhabitants for a 20-year horizon. Design and Characteristics of the Wastewater Treatment Plant (WWTP): A WWTP with a flow rate of 94.45 liters per second (l/s) was designed, occupying an area of 10 hectares. The WWTP was designed for a final population of 35,154 inhabitants for a 30-year horizon. The selected treatment technology is biological with stabilization lagoons, structured in the following phases: A. Pretreatment: Includes inlet chamber and By-pass, as well as the pretreatment stage and a main distributor. B. Secondary Treatment (Biological with Stabilization Lagoons): Composed of a facultative lagoon and a maturation lagoon. Additionally, the necessary auxiliary structures were developed for the efficient operation and maintenance of the WWTP. Comprehensive Viability Analysis: A thorough economic and social viability study was carried out, complemented by citizen consultation processes to ensure the sustainability and acceptance of the project. The scope of the study also included a Community Development and Institutional Strengthening component, essential for the long-term sustainability of the sanitation system. Environmental Management Plan: A robust environmental mitigation plan was developed, focused on protecting local water resources and minimizing adverse impacts. The design projects a 90% reduction in pollution of local rivers and demonstrates resilience in the face of intense rainfall events (up to 1,200 mm/year).
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