WE&T Magazine

WET_cover1_Mar15_90Water 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.

 


March 2015, Vol. 27, No.3

Featured Articles

Dig it

Feature 1 art Decentralized wastewater treatment is becoming well accepted as a viable, long-term solution for large-scale municipal and commercial wastewater projects. While decentralized systems will continue to serve rural areas outside city limits, the notion that they can serve only small, single-family homes has been changed. Some large decentralized systems handle flow rates in excess of 3800 m3/d (1 mgd). 

 

A collection system on the cloud

Feature 5 art DeKalb County in Georgia currently is developing a capacity management, operations, and maintenance program for its sewer system. A cornerstone of the program is geographical information system (GIS) mapping showing the location of all manholes, gravity sewer lines, force mains, valves, and water resource recovery facilities.

 

News

Adding salt to the wound

news art

USGS finds rock salt increases chloride levels in some streams 


Chloride concentrations in U.S. waters have increased due to the rock salt used to melt ice on roadways, according to findings released by researchers at the U.S. Geological Survey (USGS). Road salt application often also leads to average chloride concentrations that exceed toxic levels in the Northern U.S., according to the study.
 

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Coming in the next issue:
April 200-90

Breaking down nutrients

Every day, water and nutrients inch closer to being true commodities. They need to be procured, used, and disposed of properly both to produce all types of products as well as to protect public health and the environment. But with growing global populations comes the realization that the procurement, use, and disposal of these commodities are not a single series of events, but an ever repeating cycle. 

This realization is driving the desire to extract nutrients to produce not only clean water, but also reusable, sellable products. In the April issue, the article, “Toward a renewable future,” assesses the knowledge gaps that utilities face when deciding how to handle their nutrients. The authors seek out tools and case studies to help utilities find the right path forward. 

But changing the future doesn’t mean shrinking form the demands of the day. Another April article dives deep into the processes and problems inherent in biological nutrient removal (BNR). This troubleshooting guide will provide case studies of common problems and the fixes operators and utilities found. With a deep understanding of BNR comes confidence in making adjustments and predictability in results. 

Nowhere is predictability more essential than when using highly flammable chemicals. Methanol is an excellent carbon source for denitrification, but transferring, storing, and using it requires extensive safety measures. The article, “The three Ps,” details how to handle methanol in biological nutrient removal systems. By preparing for methanol-related tasks, preventing spills and vapor releases, and protecting against fire and explosion, O&M personnel have the knowledge and tools they need to work safely with methanol. 

  

Also in this issue:    

  • Operator ingenuity. Operators invent a low-cost, effective level gauge.   
  • Operator essentials. What every operator should know about phosphorus analyzers.   
  • Fortune hunters. Researchers investigate the potential in extracting precious metals from solids.