Aeration & Blowers White Papers And Case Studies

  1. Disc Aerators Replace Brush Aerators, Increasing Capacity And Performance
    1/15/2014

    To comply with new EPA rules and handle additional flow, the City of St. Charles Missouri WWTP required a capacity increase, and the landlocked plant needed a solution that would fit within its existing footprint. Brush aerators and boat clarifiers were replaced with 12 VLR-mounted disc aerators to fulfill the oxygen requirement while allowing for the treatment of higher organic loading. The solution provided increased nutrient-removal capacity and improved efficiency without increasing tank volume.

  2. Gas Transfer: Theory And Key Process Factors
    1/13/2014

    This paper discusses gas transfer theory and key factors of the process along with sample applications using the Dif-JetTM including; transfer of CO2 gas for pH neutralization of wastewater, for aeration and oxygenation, and for disinfection using ozone. By Gary L. Rogers, Ph.D., P.E., Applied Aquatic Engineering, LLC

  3. Top-Entry Agitators Keep Costs Low, Combat Pollution
    1/9/2014

    As the drainage basin to 85 million people, the Baltic Sea has faced considerable environmental strain for many years. Updated regulations to reduce levels of phosphorous and nitrogen prompted the Central Wastewater Treatment Plant in Saint Petersburg, Russia, to install new top-entry agitators in its aeration basins. By optimizing thrust and bulk flow, the updated plant now combats pollution by treating 400 MGD of wastewater while keeping energy costs to a minimum.

  4. Aeration Basin Air Flow Monitoring At A Stockholm Wastewater Plant
    12/20/2013

    At a wastewater treatment plant in Stockholm, Sweden, each aeration basin has several diffuser systems. Each diffuser system requires individual air flow monitoring and independent control. The air flow pipes leading to the diffusers typically do not have much straight run of pipe. This makes accurate measurement of the air flow more difficult. In addition, the air flow coming from the compressors is inconsistent

  5. Eliminating Sludge Islands In Your Wastewater Lagoon
    12/12/2013

    Old municipal and industrial wastewater lagoons have the tendency to build islands of sludge at various locations around the lagoon. It is most common for older lagoons to build such islands wherever wastewater enters the lagoons.

  6. Upgrade To Diffused Aeration Results In Significant Energy Savings
    12/12/2013

    After 35 years of use,  the fiberglass jet aeration manifolds in the Western Regional Water Reclamation Plant (Dayton, Ohio) had deteriorated, rendering four of eight wastewater aeration tanks inoperable. Managers recognized an opportunity to utilize a fine bubble diffused aeration system that eliminated the need for the pumps. The result: higher oxygen-transfer efficiency and reduced power costs to operate the system.

  7. Sewer Authority Ends Plant Bypasses And Introduces Nutrient Removal With New Treatment Process
    11/14/2013

    The original contact stabilization activated sludge process at the Portage Area Sewer Authority generated hydraulic limitations that required repeated bypasses during heavy rainfall. Find out how the treatment plant upgraded its secondary treatment aeration system to include nutrient removal through a nitrification/denitrification/phosphorus process and has successfully processed I&I induced surges that reached a 10-MGD peak.

  8. Brewery Reuses Water For Factory Wash-Down
    11/11/2013

    Looking to reduce its water footprint, Shepherd Neame Brewery invested in a complete membrane bioreactor (MBR) wastewater recovery and re-use plant. Learn how the new plant's aeration system has helped to reduce the brewery's water-to-beer ratio to an industry-leading value of 3:1.

  9. Freeport Wastewater Treatment Plant Saves Money And Energy With Hybrid Blowers
    9/30/2013

    Best known as the home of outdoor retailer L.L. Bean, the community of Freeport is a popular summer destination on the shore of Casco Bay in southern coastal Maine. In 2010, the Freeport Sewer District brought in engineering firm Woodard & Curran (also of Freeport), to conduct an energy analysis of the Freeport Wastewater Treatment Facility. The assessment revealed that the Freeport plant consumed more than 8.9 kBtu per gallon of wastewater treated, more than double the national average of 4.1 kBtu per gallon. While an outdated oil heating system contributed to the overall inefficiency, the plant’s 30-year-old multistage centrifugal aeration blowers accounted for as much as 80 percent of the electricity consumption. By Beth Brindle, Water Online

  10. Auburn University Aerator Test Results
    9/18/2013

    The DO2E Aerator differs from its competitors in several key areas. Our system is equipped with a patented mixing chamber and air manifold system that no other system has.