WE&T Magazine

August09Cover.jpgWater Environment & Technology (WE&T) is the premier magazine for the water quality field. WE&T provides information on what professionals demand: cutting-edge technologies, innovative solutions, operations and maintenance, regulatory and legislative impacts, and professional development.

 


August 2009, Vol. 21, No.8

Featured Articles

Taking It to the Next Level

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With a greater number of regions suffering severe or prolonged drought conditions, water reuse is on the rise globally and is a key part of many municipal and industrial water resource management plans. Population growth is fueling strong political support for water reuse, especially in the United States, Europe, and Australia. Growing environmental concerns about discharges are a factor when considering water reuse versus seawater desalination as a freshwater source. Key markets, such as China, the Middle East, and North Africa, have limited wastewater infrastructure for water collection and treatment. Building new wastewater infrastructure is expensive, and this fact dramatically increases the availability of wastewater for reuse.

 

Siloxanes

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Although wastewater facilities have used digester gas beneficially for years, concerns about greenhouse gases, sustainability, and energy costs have created a significant emphasis on maximizing the use of the valuable gas. Recently, many facilities have seen significant buildup of a white or brown substance wherever digester gas is burned. This buildup is primarily silicon dioxide and is the result of burning siloxanes in the gas. Siloxanes create significant problems in combustion equipment, such as boilers, reciprocating engines, and turbines. Unfortunately, most wastewater facilities are not equipped to remove siloxanes from digester gas. One facility in Baltimore, however, installed a gas-conditioning system (GCS), which has helped its operating efficiency and sustainability.

 

News

In Singapore, Used Water is NEW

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Singapore’s new Deep Tunnel Sewerage System conveys wastewater from homes and businesses through a 48-km-long (30-mi-long) tunnel sewer that runs 20 to 55 m (65 to 180 ft) below ground to a single, centralized plant for treatment.

Read more

Coming in the next issue:
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September

Design Innovation: Doing More With Less
There are three givens in wastewater treatment: Flows will increase, populations will grow, and budgets will shrink. Thankfully inventive and ingenious solutions come along to help wastewater treatment plant designers and operators stay ahead of the curve. These innovations come in many shapes and sizes. Read about how a twist on an old idea revolutionized the membrane industry, as well as how a new take on analyzing flow data helps small communities predict stormwater flows.

WEFTEC.09 Preview
Get the latest updates on the technical programming, cutting-edge technologies, and special events offered at WEFTEC®.09, which will be held in Orlando, Fla., Oct. 10–14.

Also in This Issue:

  • Meeting sustainability objectives in designing and operating WWTPs
  • How the “green building” movement is changing wastewater treatment
  • Using crude glycerin as a carbon source for denitrification