Water 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.
More than 25 years of stormwater planning
Stormwater represents one of the single largest remaining challenges to achieving the Clean Water Act’s goals for “fishable and swimmable waters.”
A milestone for stormwater regulations, the Water Quality Act of 1987, directed the U.S. Environmental Protection Agency (EPA) to issue National Pollutant Discharge Elimination System permits for municipal and industrial stormwater discharges. Since then, the stormwater field has experienced significant growth in treatment technologies, best management practices, and regulatory compliance approaches.
A chemical production facility in the Midwestern U.S. was troubled by excessive solids in its wastewater effluent.
To address the problem, the project team first converted an idle basin at the site into an anoxic basin, to enable denitrification to occur ahead of the secondary clarifiers. However, this solution failed to stem the production of nitrogen gas in the clarifiers adequately. The flotation of solids remained a problem. To provide additional degassing surface area upstream of the clarifiers, a small pipeline was added to direct a portion of the aerated mixed liquor into the outlet end of the anoxic basin.
Battling a worldwide foe
Scientists monitor and develop best practices for curbing nitrogen runoff
Despite many technological advances, nitrogen runoff from land and buildings is increasing.
Runoff is increasing because diets have changed. “We are eating higher up the food chain, generally eating more animal proteins,” said James N. Galloway, a geoscience professor at the University of Virginia (Charlottesville).
Coming in the next issue:
Coming in November
The most basic elements of a combined water and wastewater utility’s job include deliver the water, collect the water, treat the water, and, maybe, deliver the water again. Stated as a simple cycle it seems straightforward — then, the complexities start appearing. Even the seemingly simple tasks of controlling how fast and when delivery and collection happen requires an immense investment of time, resources, and thought. The November issue includes articles that examine flow control from the basics that ensure reliability all the way through new technologies that enable innovation and new opportunities.
The Operator Essentials column defines the needed terms and describes some devices and equipment common to flow control strategies. It also provides information about when different options make the most sense to use and how much those solutions might cost.
On the other end of the spectrum, one of the feature articles examines the electronic side of water systems. The article covers the nuts and bolts — sensors and computers — of how these advanced systems can operate. It goes on to discuss the advantages of robust data collection, analysis, and decision-making to ensuring a more resilient process.
Also in this issue
Catching illicit discharges while catching Pokémon. Some in the water and utility sector are using Pokémon Go and other augmented reality apps to help spread the word about water conservation and improve operations.
Curing sticker shock. Open-source data loggers broaden the horizons of environmental field research.