Towards an Efficient Generalization of the Online Dosage of Hydrogen Peroxide in Photo-Fenton Process to Treat Industrial Wastewater

Xiangwei Yu, Alejandro Cabrera-Reina, Moisès Graells, Sara Miralles-Cuevas and Montserrat Pérez-Moya
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Xiangwei Yu: Chemical Engineering Department, Escola d’Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya, Av. Eduard Maristany, 16, 08019 Barcelona, Catalonia, Spain
Alejandro Cabrera-Reina: Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Santiago 8940000, Chile
Moisès Graells: Chemical Engineering Department, Escola d’Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya, Av. Eduard Maristany, 16, 08019 Barcelona, Catalonia, Spain
Sara Miralles-Cuevas: Plataforma Solar de Almería-CIEMAT, Ctra Senés km 4, 04200 Taverns, Almeria, Spain
Montserrat Pérez-Moya: Chemical Engineering Department, Escola d’Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya, Av. Eduard Maristany, 16, 08019 Barcelona, Catalonia, Spain

IJERPH, 2021, vol. 18, issue 24, 1-19

Abstract: This work addresses the dosage of H 2 O 2 in photo-Fenton processes and the monitoring of Dissolved oxygen (DO) that can be used to drive the dosage of H 2 O 2 . The objective of this work is to show that a smarter monitoring of a process variable such as DO (for which on-line measurement can be inexpensively obtained) enables the proposal and implementation of efficient dosage strategies. The work explores the application of a recent proposed strategy consisting of: (i) initial H 2 O 2 addition, (ii) continuous H 2 O 2 addition until a DO set up is reached, and (iii) automatic H 2 O 2 addition by an on-off control system based on DO slope monitoring, and applies it to the treatment of different individual contaminants and their mixtures (paracetamol and sulfamethazine). The assays performed following this dosage strategy showed improved values of TOC removed per H 2 O 2 consumed. For the case of sulfamethazine, this improvement increased up to 25–35% with respect to the efficiency obtained without dosage. Furthermore, a deeper analysis of the results allowed detecting and assessing the opportunity to redesign the dosage scheme and reduce its complexity and the number of control parameters. The promising results obtained are discussed in regard of future research into further increasing the simplicity and robustness of this generalized control strategy that improves the applicability of the photo-Fenton process by reducing its operating costs and increasing automation.

Keywords: photo-Fenton process; hydrogen peroxide dosage; dissolved oxygen; control; wastewater; paracetamol; sulfamethazine (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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