Insights into brewery wastewater treatment by the electro-Fenton hybrid process: How to get a significant decrease in...

Area of Science:

• Environmental Chemistry
• Wastewater Treatment
• Advanced Oxidation Processes

Background:

• Brewery wastewater (BW) presents significant pollution challenges requiring effective treatment solutions.
• Conventional methods like Fenton and electrocoagulation (EC) have limitations in efficiency and catalyst management.
• The electro-Fenton hybrid (EFH) process offers a promising alternative for pollutant abatement and toxicity reduction.

Purpose of the Study:

• To optimize the electro-Fenton hybrid (EFH) process for brewery wastewater treatment.
• To evaluate the effectiveness of EFH in reducing total organic carbon (TOC) and toxicity.
• To determine optimal operational parameters for selective experimental arrays in EFH.

Main Methods:

• Preliminary assessment of Fenton and electrocoagulation (EC) processes, including Fe2+ yield and H2O2 loss.
• Application of a 3^3 full factorial design (FFD) to evaluate TOC removal efficiency.
• Experimental arrays involved optimizing pH, Fe2+ production time, and H2O2 renovation percentage under EFH conditions.

Main Results:

• Optimized EFH treatment achieved approximately 90% TOC removal.
• Significant reduction in brewery wastewater toxicity was observed.
• Refined EFH conditions demonstrated superior performance compared to preliminary methods.

Conclusions:

• The electro-Fenton hybrid (EFH) process is highly effective for brewery wastewater treatment.
• Optimized EFH parameters provide a sustainable approach for pollutant abatement and toxicity reduction.
• This study offers a unique perspective for removing significant pollutants from industrial wastewater.