A preliminary design of an ozonation process in a municipal wastewater treatment plant for water reuse

Abstract

In the last few years, water scarcity has arisen as a major problem around the world. This scarcity has put pressure on water accessibly for human use such as drinking water, irrigation, industry, etc. Moreover, climate change, population growth and water pollution have exacerbated the situation. This project focuses on water reuse, a strategy currently under study to deal with this problem. Wastewater needs to go through complex treatments in order to be reused. These complex processes must be designed to disinfect water and eliminate or reduce the concentration of pollutants and micropollutants (MP). Advanced oxidation processes (AOPs) are well known technologies that can effectively contribute to reducing biological and chemical pollutants. The aim of this project is to study the application of the ozonation process using a preliminary design in the Vilaseca/Salou municipal wastewater treatment plant as a tertiary treatment. A mathematical model was used for a subsequent micropollutant abatement estimation, which showed that depending on the flow of water to be treated and ozone dose applied, ozonation can be a very effective process for eliminating MP