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

This work addresses the dosage of H O in photo-Fenton processes and the monitoring of Dissolved oxygen (DO) that can be used to drive the dosage of H O . 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 inexpensive...

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Bibliographic Details
Published in:International journal of environmental research and public health 2021-12, Vol.18 (24), p.13313
Main Authors: Yu, Xiangwei, Cabrera-Reina, Alejandro, Graells, Moisès, Miralles-Cuevas, Sara, Pérez-Moya, Montserrat
Format: Article
Language:English
Subjects:
Analgesics
Automation
Chemical oxygen demand
Contaminants
Control systems
Dissolved oxygen
Dosage
Experiments
Hydrogen Peroxide
Industrial wastes
Industrial wastewater
Iron
Mineralization
Monitoring
Operating costs
Oxidation
Oxidation-Reduction
Paracetamol
Pharmaceutical industry
Pollutants
Pollution monitoring
Process variables
Redesign
Robust control
Sulfamethazine
Waste Disposal, Fluid
Wastewater
Wastewater treatment
Water Pollutants, Chemical
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Summary:This work addresses the dosage of H O in photo-Fenton processes and the monitoring of Dissolved oxygen (DO) that can be used to drive the dosage of H O . 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 O addition, (ii) continuous H O addition until a DO set up is reached, and (iii) automatic H O 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 O 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.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph182413313