Ozonation with Hydrogen Peroxide for Treating Wastewater from Industrial Potato Processing - a Preliminary Investigation

Wastewater generated from agricultural activities and food production is a source of environmental pollution, and its treatment is a challenging technological issue. Ozone gas (O 3 ), and the possibility of associating it with hydrogen peroxide (H 2 O 2 ), has the potential to remove persistent orga...

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Published in:Ozone: science & engineering 2024-01, Vol.46 (1), p.53-63
Main Authors: Ribeiro, Patrícia Helena, Faroni, Lêda Rita D'Antonino, Silva, Greicelene Jesus da, Heleno, Fernanda Fernandes, Cecon, Paulo Roberto, de Alencar, Ernandes Rodrigues, Borges, Alisson Carraro
Format: Article
Language:English
Subjects:
Advanced oxidative processes
Agricultural wastes
Chemical oxygen demand
Color
colour
effluent quality
Flow rates
Food production
Food sources
Hydrogen peroxide
Industrial wastewater
Mathematical analysis
Organic compounds
Oxygen
Ozonation
Ozone
Potatoes
Turbidity
Wastewater treatment
Water quality
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Summary:Wastewater generated from agricultural activities and food production is a source of environmental pollution, and its treatment is a challenging technological issue. Ozone gas (O 3 ), and the possibility of associating it with hydrogen peroxide (H 2 O 2 ), has the potential to remove persistent organic compounds in effluents. In the present work, wastewater from industrial potato processing was characterized, and its treatment with ozone combined with hydrogen peroxide was assessed. The inlet ozone concentration and the flow rate were 84.5 mg L −1 and 62.5 mL min −1 , respectively. The promising conditions of temperature, pH, and H 2 O 2 /O 3 proportion were determined to reduce the chemical oxygen demand, turbidity, and color, according to a central composite rotatable design. The H 2 O 2 /O 3 proportions were 0.1, 0.3, 0.5, and 0.6. Additionally, the response variables were evaluated as a function of the ozone and hydrogen peroxide treatment time for up to 24 h. The conditions obtained for treating wastewater from industrial potato processing were the following: temperature = 25°C; pH = 3.0, and H 2 O 2 /O 3 proportion = 0.1. For the water quality parameters adopted, the combination of ozone and hydrogen peroxide was effective at removing color and turbidity. The chemical oxygen demand, color, and turbidity reduction stabilized after 1.16 h, with cumulative applied dosages of ozone and hydrogen peroxide equal to 380 mg L −1 and 35 mg L −1 , respectively.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919512.2023.2196306