Design and drafting of a new waste-water treatment plant in Begur (Girona, Spain)

Abstract

This work presents the design of a new Wastewater Treatment Plant (WWTP) for the municipality of Begur (Girona, Spain), adapted to strong seasonal variations due to tourism. The plant has a design capacity of 3,000 PE (population equivalent), with flows ranging from 20,89 m³/h in low season to 38,58 m³/h in peak season. The proposed treatment scheme includes pretreatment and a biological process based on a Membrane Bioreactor, with effluent discharged into the marine environment via a submarine outfall. Sludge is treated through thickening and a Planted Drying Bed system, enabling its reuse as compost for agricultureThe study defines the design basis, evaluates alternatives, selects the most suitable technologies, and ensures compliance with environmental regulations and the applicable discharge standards set by the relevant authorities. The final design ensures technical efficiency, environmental sustainability, and adaptability to seasonal fluctuations