WE&T Magazine

Oct06CoverWater 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.

 


October 2006, Vol. 18, No.10

Featured Articles

Evaluating Bioreactor Alternatives

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Selecting the optimal process to treat organic or inorganic contaminants present in industrial wastewaters or other aqueous streams can be simplified through the use of a general framework, especially when site-specific conditions make reactor efficiency an important consideration.

 

State of Alarm

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As the typical wastewater treatment plant increases in size and complexity, operators face growing challenges as they try to supervise individual process components while simultaneously overseeing the entire treatment system. A distributed control system that monitors and controls the various components comprising a facility’s overall treatment process can assist operators with these tasks, provided that the distributed control system is designed with the needs of operators in mind. 

 

News

Supreme Court Splits on Wetlands Protection

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A U.S. Supreme Court decision handed down in June suggests that the U.S. Army Corps of Engineers and U.S. Environmental Protection Agency (EPA) may have misinterpreted the Clean Water Act (CWA) when they prevented two Michigan landowners from developing on wetlands.

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Coming in the next issue:
Nov06Cover

November
  •  Are You Looking Into Your Outfalls? Outfall diffusers are just as important as any of the other equipment at a wastewater treatment plant, but they are much less visible, and rarely inspected. Learn how underwater investigations helped one utility assure regulatory compliance.
  • So, You Decided To Build an MBR? Membrane bioreactors are a viable treatment alternative when a wastewater utility has footprint constraints, a market for reclaimed water, or needs to produce a high-quality effluent. But they require good process engineering to ensure cost-effective operations.
  • Equipment First, Plant Design Second. When opting for small-footprint technologies, sometimes it’s best for utilities to avoid the traditional design–bid–build approach. Often, utilities are better served by choosing a treatment technology, selecting an appropriate vendor, and then commissioning a design based on that vendor’s equipment.
  • Keeping Safe and Dry. As more and more municipalities chose thermal drying to solve the growing problems associated with biosolids disposal, it is important to incorporate the appropriate electrical, mechanical, and process safeguards into the drying process or the potential safety hazards may outweigh the benefits of a Class A operation.
  • Negotiating Polymers. How do you know if you’ve struck a good deal with my polymer vendor? What could you have done better? And once you get the polymer to the plant, how can you be sure you’re getting the most performance for the money?
  • Wringing Money from Solids. Using polymer to condition solids rather than iron and lime resulted in considerable operating savings, increased dewatering capacity and solids throughput, and reduced the amount of solids recycled in a water treatment plant.