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.
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Your pumps may be stealing from you
There are thieves in your collection system. These thieves are the pumps that are wasting energy and costing you money every day they run. Like many thieves, these energy thieves don’t advertise their presence. They look, sound, smell, and feel just like any other pump in the system. It’s up to the system operator to be a conscientious detective and ferret out these bad guys.
Sizing UV disinfection
There are a number of methods for sizing ultraviolet (UV) light disinfection systems to meet permit limits, but many result in inappropriately sized systems. During a recent design–build project, however, the project team developed a method for determining a reasonable minimum design UV transmittance and minimum required UV dose. The team also found a way to directly compare UV disinfection systems from various manufacturers. Read more
All eyes on Florida
U.S. EPA’s numeric nutrient standards raise questions, concerns
Since the U.S. Environmental Protection Agency (EPA) promulgated nutrient criteria for Florida’s fresh waters on Nov. 14, the rest of the country has been watching. This is the first time EPA has stepped in to set numeric criteria for a state. Those in the regulated community want the best science to guide decision-making and are looking for certainty that the number is right and that they can meet it.
Coming in the next issue:
Tracing the nutrient removal path
As nutrient standards tighten, it is becoming ever more important to fully understand where nutrients come from, what options are available to remove them, and how creative approaches can help the situation. In this issue, WEF President Jeanette Brown shares her insights on how the nutrient removal practice has grown and where it should go next.
This issue also covers criteria for selecting a nutrient removal option, the finer points of installing a biological nutrient removal process at a wastewater treatment plant, and how one plant’s nutrient removal efforts allowed it to generate and sell nutrient credits to offset treatment costs.
Planning for a rainy day
Complete this saying: “April showers bring …”
If you said, “excess stormwater that leads to combined sewer overflows,” the April issue has an article for you.
Find out how a Massachusetts utility took advantage of real-time flow measurement devices coupled to automated diversion gate controls to simplify storm preparation for operators, make use of in-line storage capacity, and reduce combined sewer overflows.
Low-maintenance FOG introduction
Rising energy prices have prompted interest in energy recovery, which in turn has promoted innovations in accepting fats, oils, and grease (FOG) at municipal wastewater treatment plants.
Learn more about co-processing FOG with solids, and how to avoid problems such as pipe and pump blockages, digester foaming, grit accumulation in digesters, “stuck” digesters, clogged gas-collection and -handling systems, flashback and air emission exceedances in multiple hearth incinerators, and excessive maintenance.
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