Identificação da oportunidade de criar um sistema de recirculação de água, para o Complexo Químico de Estarreja

Frederico Roquete Viana Neto

Key information

Authors:

Frederico Roquete Viana Neto (Frederico Roquete Viana Neto)

Supervisors:

Susete Maria Martins Dias (Susete Maria Martins Dias)

Published in

November 24, 2022

Abstract

This dissertation aims to assess the feasibility and design of a water reclamation system, from the Cacia wastewater treatment station to the Estarreja Chemical Complex, while evaluating the possibility of wastewater reuse as a water source, considering the associated costs and environmental benefits that come with this reuse. The results show the possibility of implementation of a water reclamation system, composed of a piping system 15.7 km long, with two pumping stations and four reservoirs. Two different investment scenarios were considered, corresponding to a direct cost of equipment of 13 865 k€ or 18 697 k€, with an added operational cost that corresponds to the energy consumption of the pumps that is equal to 0.504 kWh/m3. The externalities of such an implementation would be in alignment, thematically and objective-wise, with national (considering the Water Law and the Water Basin Management Plan, of the rivers Vouga, Mondego and Lis) and global contexts, as the UN Sustainable Development Goals. The plans for funding environmentally sensitive actions in the EU, such as the Cohesion Fund and the European Regional Development Fund, complemented the viability assessment, resulting in a positive impact by contributing to preserving the hydric domain, and thus, the region’s ecosystem.