Aeration Towers, Degasifiers for Advanced Odor Removal

Forced draft aeration towers and degasification systems from KCH Engineered Systems are designed to meet the demands of municipal drinking water treatment plants. The company's advanced system is capable of effectively stripping hydrogen sulfide odor from millions of gallons of water per day. KCH also designs and manufacturers air strippers to remove VOCs, THM, carbon dioxide, and other compounds from contaminated water.

KCH's systems are comprised of a vertical counter current tower filled with packing media, a field adjustable liquid distribution system, and other critical internals to allow for proper degasification. These systems are constructed of Polystrong™ or Polylast™ material, providing structural integrity, UV protection and corrosion resistance required for outdoor installations.

KCH degasification system.

These vessel materials are certified to NSF/ANSI 61-G for health effects and lead content. All components within the degasifier tower that come into contact with potable water are NSF/ANSI 61-G Drinking Water System Certified. When needed, KCH will design and manufacture vessels to handle up to 150 MPH wind loads.

The KCH design team pays careful attention to critical factors that can greatly affect the removal efficiencies of an aerator or degasifier. These factors can include water temperature fluctuations, alkalinity, total sulfide content, pH, and many others. The aeration and degasifier systems can include additional components needed to provide a complete functioning system such as:

• AMCA rates blowers
• Access manways
• Air filters for blowers
• OSHA-approved ladders and platforms
• Sound enclosures for blowers
• Cleaning systems
• Instrumentation and controls
• Odor control systems for off-gas
• Differential pressure indication
• Startup and training

How It Works

Odorous or contaminated water enters the top of the tower and is uniformly distributed onto the packed bed section, which breaks the water into smaller droplets and increases the overall surface area. A KCH centrifugal blower introduces counter-current air flow at the base of the column, where it travels vertically through the media to strip H2S gas from the drinking water. The H2S-laden air is typically then sent to a KCH odor control bio-scrubber or wet scrubber. Packing depths are as required to meet the application's removal efficiency.

Applications suitable for these systems include municipal water treatment, industrial wastewater treatment, groundwater remediation, and leachate treatment.

In summary, KCH advanced odor removal systems offer a number of benefits, including: reduction of odors and contaminants from water; NSF/ANSI-61-G-certified materials of construction for drinking water systems; capacities to 7 MGD in a single tower; low maintenance; designs to remove H2S, CO₂, THMs, and VOCs; constructed of Polystrong and Polylast material, which offers maximum structural integrity and corrosion protection, as well as 100-percent UV blockage to prevent biological growth formation; and scrubbing of off-gas can be provided by KCH for single-source responsibility.

KCH Engineered Systems is an exhibitor at WEFTEC.15 and can be found at Booth 5631. For more information, visit www.kchservices.com.