Kinetic modelling of total organic carbon degradation in dairy wastewater

Several treatment strategies have been proposed to minimize the environmental impact of dairy wastewaters. However, their complex and variable composition makes it difficult to predict the degradation kinetics of organic compounds. In this study, we used a mathematical approach to describe the kinet...

Full description

Saved in:

Bibliographic Details
Published in:	Environmental technology Vol. 45; no. 5; pp. 880 - 887
Main Authors:	Enokihara, Gisella Harue, Loures, Carla Cristina Almeida, Izário Filho, Helcio José, Alcântara, Marco Aurélio Kondracki, Siqueira, Adriano Francisco, Da Rós, Patrícia Caroline Molgero, Napoleão, Diovana Aparecida Santos, Aguiar, Leandro Gonçalves de
Format:	Journal Article
Language:	English
Published:	England Taylor & Francis 23-02-2024 Taylor & Francis Ltd
Subjects:	Carbon Contaminants Dairy industry wastewaters Dairy wastewater Degradation Environmental impact Exponential functions in natura effluent Kinetics Luminous intensity Organic carbon organic carbon degradation Organic compounds Oxidation photo-fenton Reagents Size distribution Total organic carbon Ultraviolet radiation Wastewater treatment photo-fenton organic carbon degradation Dairy wastewater kinetics in natura effluent
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Several treatment strategies have been proposed to minimize the environmental impact of dairy wastewaters. However, their complex and variable composition makes it difficult to predict the degradation kinetics of organic compounds. In this study, we used a mathematical approach to describe the kinetics of total organic carbon degradation in real dairy wastewater by photo-Fenton oxidation. The reactions were conducted under different ultraviolet light intensities, pH, temperature and Fenton reagent concentrations, obtaining a maximum TOC removal of 90.84%. The kinetic model was developed based on well-established photo-Fenton reactions. The present approach considers that account that small and large molecules of unknown contaminants are present in the effluent, and the smaller molecules are consumed first. The specific degradation rate (k d ) was considered as an exponential function of total organic carbon conversion, comprising this effect of molecular size distribution on the treatment process. Fitting of experimental data to model predictions provided mean R 2 values of 0.843-0.953.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0959-3330 1479-487X
DOI:	10.1080/09593330.2022.2130103