Blown Out of the Wastewater   Water & Wastes Digest September 2005   By Jon Zabrocki, P.E. and Paul Larson, P.E.
By precisely controlling pressure in the air header and modulating airflow to each aeration zone to maintain set point DO levels, the energy usage is minimized through efficient operation.

Keeping Odor Under Control   Water & Wastes Digest August 2005   By Ed Sullivan
“We are very concerned about maintaining an odor cap,” said David Williams, project engineer at Shell Oil (Shell Manufacturing) Martinez Refinery, California “Our treatment pond is about 1/4 mile from a residential community. We’ve got a delicate situation where even just a slight amount of odor could arouse complaints from the community. So, we keep a close eye on it.”

A Reliable Tool   Water & Wastes Digest April 2004   By Rick Davis
By implementing fluorescent technology in the measurement of DO levels, wastewater professionals may have a reliable tool that allows for the optimization of the biological processes and a reduction in the aeration costs related to energy usage.

Back to the Basics, Part 3   Water Quality Products July 2002   Jeff Roseman, CWS-1, Aqua Ion Plus+ Technologies
In this last section of a three-part series, the use of ozone, ionization, distillation and aeration is discussed in a simple fashion to help the beginner rationalize the importance for a full understanding of these technologies and the need, again, for a professional water treatment specialist.
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Practical Engineering Combined with Sound Operations Optimizes Phosphorus Removal   Water Engineering & Management April 2002   Daniel Bolduc and James Fitch, P.E.
Built in the early 1970s, The Oakland, Maine, Wastewater Treatment Facility (WWTF) treats and discharges approximately 300,000 gallons per day (gpd) of wastewater to the Messalonskee Stream. The facility was designed as a conventional activated sludge secondary treatment system to be used principally for BOD and TSS removals. The secondary effluent enters the Messalonskee Stream upstream of several impoundments. This practice has resulted in a steady decline in the water quality of the stream as evidenced by increased algae blooms and other signs of euthophication in impoundments located downstream of the discharge.
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Biofilm Elements Treat Colorado Town   Water Engineering & Management January 2002
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Wastewater Impoundment Converted To Process Tank At Georgia Chemical Company   Water & Wastes Digest May 2001
Fisher Tank Company of Chester, Pa., has placed a leakproof steel liner into a 260-ft.-diameter, 14-ft.-deep wastewater treatment facility at the caprolactam production plant of DSM Chemicals North America, Inc., near Augusta, Georgia.
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Aeration Performance of Weirs - Part 2   Water Engineering & Management April 2001   Dr. Ahmet Baylar and Tamer Bagatur
The results of experiments of four types of weirs showed that drop height is the most important factor influencing oxygen transfer efficiency.

Aeration Performance of Weirs - Part 1   Water Engineering & Management March 2001   Dr. Ahmet Baylar and Tamer Bagatur
Oxygen is vital to the life cycle common to water. It is essential to keep organisms living, to sustain species reproduction and for the development of populations. Oxygen is soluble in water in direct proportion to the partial pressure in the gas phase, while solubility decreases as temperature increases. Salt water holds less oxygen than fresh water. Oxygen enters the water by absorption directly from the atmosphere or by plant photosynthesis. It is removed by respiration of organisms and by organic decomposition. During respiration and decomposition, animals and plants consume dissolved oxygen and liberate carbon dioxide.

Aerators Stop Odors in Chicago   Water Engineering & Management January 2000
Chicago and its surrounding 51 communities cover an area of 375 square miles and have a population of over 3,000,000 people. This metropolis is served by a combined sewer network carrying both raw sewage and stormwater in a single pipe.