Background
There is an increasing presence of special wastewater pre-treatment stations at municipal and mixed wastewater treatment facilities. These installations handle diverse industrial effluents including landfill leachate, septic tank sludge, food processing waste, textile runoff, metal processing discharge, and chemical wastes.
A core challenge is determining the "compatibility" of industrial and special effluents with biological treatment processes, given discharge limit requirements under Italian legislation (D.lgs 152/1999 and subsequent D.lgs 258/2000 art.36).
FENTON Multidimensional Fuzzy-Model Control
The FENTON process represents a chemical oxidation treatment addressing biologically non-treatable effluents, particularly those with high toxicity or inorganic content. ANOVA developed "an automated control system for FENTON chemical oxidation processes" based on real-time measurement of pH, ORP, and COD. The system optimizes H₂O₂ and FeSO₄ dosing based on incoming effluent characteristics, adjusted for pH and temperature conditions.
Application Fields
The technology applies to industrial discharges containing toxic organic compounds including phenols, formaldehyde, dyes, pesticides, and plastic additives. The process relies on hydroxyl radical reactivity under controlled pH and temperature, generated from hydrogen peroxide and iron.
The SWT-FNT Calculation Model
FENTON constitutes an Advanced Oxidation Process (AOP) using hydrogen peroxide (H₂O₂) and iron salts (FeSO₄) in acidic conditions, treating high-COD industrial discharges containing anionic surfactants and toxic compounds including benzene, toluene, and PCDs.
Henry J. Fenton first observed in 1894 that H₂O₂ dissociates in iron salt presence, generating hydroxyl radicals, successfully oxidizing tartaric acid. Subsequent research established the hydroxyl radical's significance in biological chemistry, synthesis, water chemistry, and hazardous waste treatment.
SWT-FTN Software Documentation
- General FENTON Process Information
- Process Description
- FENTON as pre-treatment upstream of biological processes
- Typical FENTON Application Fields
- FENTON Reaction Kinetic Models and Reagent Dosing
- Reagent Dosing (H₂O₂ + FeSO₄)
- The WWT-FENTON Calculation Model
- COD and Anionic Surfactant (MBAS) Removal Efficiency
- SWT-FNT Software Operation Guide