High-purity chlorine dioxide generator Millennium III™

for water treatmentfor disinfectionby electrolysis

Overview
The Millennium III™ Chlorine Dioxide Generator delivers controlled, high-purity chlorine dioxide for drinking water disinfection and pre-oxidation. Concentrated chemical precursors are vacuum-fed to optimize reaction control and maximize chlorine dioxide yield (up to 95%) while minimizing by-product formation. The system incorporates fail-safe interlocks to prevent chemical feed on loss of motive water or vacuum and meets NSF 61 for potable water applications. Evoqua service and aftermarket support are available for design, commissioning and maintenance.

Key benefits

• Control of disinfection by-products (DBPs), including THM and HAA reduction
• Maximum chlorine dioxide yield efficiency (up to 95%)
• Removal of iron and manganese; taste and odor improvement
• Fail-safe mechanisms and interlocks for safe operation
• NSF 61 compliance for drinking water systems

Configurations

• Reaction chemistries: selectable 2-chemical or 3-chemical systems
• Operation modes: Manual, Batch, Automatic
• 3-chemical designs accept 12.5% sodium hypochlorite or 0.8% on-site electrolytic-generated bleach

Features

• Vacuum-fed concentrated precursor chemical delivery for controlled reactions
• Low-flow control valves engineered for precise precursor dosing
• PID control loop for sodium chlorite dosing
• Touch-screen HMI for setup, parameter changes and troubleshooting
• Real-time effluent analysis via in-line (full-flow) chlorine dioxide analyzer enabling self-tuning and performance display
• Fail-safe interlocks to prevent chemical feed on loss of motive water or vacuum

Applications

• Primary and secondary disinfection in drinking water treatment
• Pre-oxidation for iron and manganese removal
• Control of slime, algae, bacteria, viruses and protozoa (including Giardia, Cryptosporidium and Legionella)
• THM/THAA (DBP) control without bromate formation
• Taste and odor control
• Biofilm and nitrification control
• Mollusk control and other site-specific uses

Technical specifications

• Chlorine dioxide yield efficiency: up to 95%
• Precursor delivery: vacuum-fed concentrated chemicals
• Fail-safe protection: prevents chemical feed on loss of motive water or vacuum
• Standards: complies with NSF 61 for drinking water applications
• Reaction chemistries: 2-chemical or optional 3-chemical configurations
• 3-chemical compatibility: designed to accept 12.5% sodium hypochlorite or 0.8% electrolytic-generated bleach
• Control hardware: low-flow control valves and PID loop for sodium chlorite
• Operator interface: touch-screen HMI for setup and troubleshooting
• Process monitoring: in-line full-flow chlorine dioxide analyzer for self-tuning and performance display
• Service: Evoqua full-service solutions and aftermarket support for design, commissioning and compliance