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.
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
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.
Adding salt to the wound
finds rock salt increases chloride levels in some streams
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.
Coming in the next issue:
Breaking down nutrients
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
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.
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
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.
in this issue:
ingenuity. Operators invent a low-cost, effective level gauge.
essentials. What every operator should know about phosphorus analyzers.
hunters. Researchers investigate the potential in extracting precious metals