With the continuing increases in energy costs and the requirements of Biological Nutrient Removal (BNR), the design of the aeration system has become one of the most important aspects of the design of the activated sludge process.
High speed bearing technology is applicable for aeration blowers operating at much higher speeds than the typical 60Hz, 3600RPM for cast multistage units. High Speed Turbo (HST) units are usually single stage (though some utilize multiple cores) and rotate from 15,000 to 50,000RPM. At such high speeds, standard roller bearings cannot offer the industry standard L10 bearing life. Two types of bearing technologies have come to dominate the wastewater treatment market for these types of machines: airfoil and magnetically levitated. Often the two technologies are compared as equals, however, in many significant ways they are not.
Compressed Air Best Practices® Magazine interviewed Frank Mueller (President) and Stephen Horne (Blower Product Manager) from Kaeser Compressors. Kaeser Compressors continues to grow both in the U.S. and internationally. We currently employ approximately 4800 people globally. In order to support the demand and maintain our superior quality and quality service levels, we continue to invest in people, facilities and technology.
Productivity is more reliable when equipment can be monitored to detect incipient failures and take corrective action before the plant goes down. But many devices, such as analog control valves, pneumatic valve terminals and field sensors, often do not offer diagnostic feedback, or it is not being used. This white paper describes how this problem is being addressed, and includes an example of pneumatic valve terminals that can monitor, among other things, open load or coil currents at the specific valve and pressure inside the valve terminal.
The 86th annual Water Environment Federation technical exhibition and conference, known as WEFTEC 2013, was held October 5-9 in Chicago’s McCormick Place. Show organizers reported record preliminary numbers with 22,598 attendees, 971 exhibitors, and a total net square footage of exhibit space of 297,400. As usual, I donned my “roving reporter hat”, took my “budget camera” and visited as many of the aeration blower vendors as I could.
With sustainability and energy-efficiency targets tougher than ever, magnetic bearings are drawing the attention of engineers in many industries, offering a whole range of advantages from increased performance to extended lifespan.
WEFTEC® 2013, presented as “the water quality event”, is taking place from October 5 to October 9, 2013 at McCormick Hall in Chicago. WEFTEC®, the Water Environment Federation’s Annual Technical Exhibition and Conference, is the largest conference of its kind in North America. Attendance is expected to be over 17,000 people.
Advanced Automation Lowers Labor Cost and Improves Performance at the Las Palmas, California, Waste Water Treatment Plant
Recently the capacity of the Las Palmas, California, waste water treatment operations were expanded by combining two plants and making one centralized filtration center. The new center expanded the flow capacity from 162,000 Gallons per Day (GPD) combined to 288,000 GPD when the manually controlled reclaimed water operations were updated to a state-of-the-art automated system. Reclaimed water from the plant irrigates local community green spaces. The new automated system ensures lower labor costs, consistent quality, and peak efficiency in the process of reclaiming waste water for irrigation.
In the absence of official third party specifications on energy efficiency, it is difficult to evaluate and compare blower technologies fairly and effectively. The lack of readily available evaluation tools leads to misinformation and unfair comparisons between technologies. Further, the performance verification process is difficult to prove.
Compressed Air Best Practices® Magazine interviewed Mr. Omar Hammoud, the CEO and President of APG-Neuros. APG-Neuros was founded in 2006 in Quebec as a result of seeing an opportunity for innovation in the North American blower market. Our mission is to distribute, manufacture, provide aftermarket support and continued development of high-efficiency turbo blowers and complete Aeration Systems for the municipal and industrial markets in North America and Europe.
Every municipality and utility is facing the reality of rising energy costs. In 2010, the Town of Billerica, MA, which is located 22 miles northwest of Boston with a population of just under 40,000 residents, engaged Process Energy Services and Woodard & Curran to conduct an energy evaluation of the Town’s Wastewater Treatment Facility (WWTF) and pump station systems sponsored by National Grid. The objective of the evaluation was to provide an overview of each facility system to determine how electrical energy and natural gas were being used at the facility and to identify and develop potential costsaving projects.
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