Introduction
The OxyStream™ is a biological nutrient removal system designed to treat wastewater by removing biodegradable organics. It utilizes a modified activated-sludge process with vertically mounted, low-speed surface aerators in a continuous racetrack layout to enhance oxygen transfer efficiency and flexibility in power usage.

Process System
WesTech provides a tailored process design for each OxyStream™ application, considering influent characteristics to determine reactor sizing and oxygen requirements. The system may include biological selector zones to meet stringent nutrient limits and is supported by a process guarantee and operator training.

Features

• Efficient Surface Aerator
• Increased Power Turndown
• Proven Technology
• Performance Guarantees
• Equipment Monitoring
• Flexible/Automated Operation
• No License Fees

Benefits

• Energy Savings
• Improved Pumping Capacity
• Minimized Downtime
• Extended Drive Unit Life
• Improved Process Performance
• High-quality Effluent

Stages and Components
The system includes several key stages and components:

• Anaerobic Selectors: Promotes phosphorus uptake.
• Pre-anoxic Zone: Facilitates nitrogen removal through denitrification.
• Aerobic Channels: Ensures complete oxidation of BOD and ammonia.
• Post-anoxic Zone: Prevents anaerobic conditions and secondary phosphorus release.
• Re-aeration Zone: Final oxygenation step.

Key Components

• Landy-7 Surface Aerators: High oxygen transfer efficiency.
• Turning Vanes: Minimize hydraulic losses and prevent solids settling.
• Effluent Weir: Adjusts impeller submergence for optimal separation.
• Internal Recycle Gate: Facilitates nitrate recycle without pumping.
• Selector Zone Mixer: Keeps solids in suspension for optimal contact.
• Aeration Deck: Contains aerosols and provides maintenance safety.
• Dissolved Oxygen Probe: Controls oxygen input.

Contact Information
WesTech Engineering, Inc., Salt Lake City, Utah, USA. Tel: 801.265.1000, Email: [email protected], Website: westech-inc.com