WE&T Magazine

Coming in the July IssueWater 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.


July 2008, Vol. 20, No.7

Sewer Sociology Contest
Do you think you know the answer to our mystery land use example?  Click here  to enter our contest, and you could win a WE&T prize pack!
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Featured Articles

Just Connect

justconnect.jpg Many municipal treatment plants have a plantwide supervisory control and data acquisition (SCADA) system. Many also have complex package control systems, which typically are provided for equipment supplied with all ancillaries furnished by one vendor, such as centrifuges, ultraviolet disinfection systems, and process air blowers. These package system controls are configured by the manufacturers based on their knowledge and expertise in monitoring and controlling their own equipment. But in order to fully realize the benefits of SCADA, utilities should integrate these package control systems into the larger, centralized system.


Low-Shear Dewatering

low-sheardewatering.jpg Mechanical dewatering of biosolids is becoming a standard process at many wastewater treatment plants based on the need to transport biosolids long distances for final use and disposal or to subject biosolids to further processing. Centrifuges generally can produce a drier cake but at a higher conditioning chemical dose. Recent studies have shown that the high shear in centrifuges also is a main cause of dewatered-cake odor.

This article explores alternative dewatering devices that do not impose comparable shear on sludge yet provide potentially comparable cake solids. Performance of these technologies, such as rotary and screw presses, can be comparable to centrifuges in some conditions.



U.S. EPA Water Office Unveils Draft ‘Response to Climate Change’ Strategy

usepawateroffice.jpg The U.S. Environmental Protection Agency (EPA) Office of Water in March issued a draft of its National Water Program Strategy: Response to Climate Change. For wastewater utilities, the projected impacts have implications for planning both day-to-day operations and the design of new facilities. Expected changes include increasing water pollution problems, such as decreases in dissolved-oxygen levels and heightened toxicity of some pollutants, as well as heavier precipitation in some areas and reduced rainfall in others. Read more

Coming in the next issue:
August Cover 08

Coming in the August Issue
  • Going for the Green. A water reuse project is expected to help China create an environmentally sustainable Olympics.
  • Don’t Debate; Adapt. Adaptive implementation can help water quality professionals achieve TMDL goals.
  • Looking Around the Bend. Seven states search for sustainable ways to augment the Colorado River system.
  • Better Trihalomethane Control. Chloramination isn’t just for water treatment anymore.
  • Tour Tips. Find out how to plan a successful facility event.
  • Wipe Out. One utility’s public battle against disposable wipes.