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.
Managing the deluge
When confronted with
increasing peaking factors and excessive wet weather flows, many utilities are
faced with the decision of whether to expand existing water resource recovery
facilities or build high-rate, blended-flow facilities specific to wet weather
treatment to provide storage for wet weather flow management or both. The
Trinity River Authority (TRA; Arlington, Texas) selected a treatment and
storage approach to wet weather management.
Payback in the Outback
How big does a wastewater
facility need to be to implement anaerobic digestion? The current perception is
that smaller facilities, typically less than 19 ML/d (5 mgd) in size, are
limited in their opportunities for generating biogas. However, recent
experience in Australia demonstrates
that small-scale facilities can have positive business cases for new anaerobic
digestion and resource recovery capabilities.
Is salt the ‘sleeping dragon’ of wastewater pollutants?
With U.S. EPA developing new
chloride limit criteria, the water quality field eventually could face
Last October, the Santa
Clarita Valley Sanitation District unanimously approved an advanced wastewater
treatment project that will comply with State of California-mandated chloride
limits for treated water produced by the sanitation district’s two water
resource recovery facilities (WRRFs). The state previously had determined that
high levels of chloride harm salt-sensitive crops downstream of the treatment
plants. The district must comply with the state’s chloride limits to avoid
hefty fines — which could run into the millions.
Coming in the next issue:
Every day managing water
resource becomes more like juggling a financial portfolio. Debits, credits, and
market conditions all conspire to influence which move is the right one. These
forces, if not understood and managed, can wreak havoc. But with the right
tools and perspectives, water challenges provide the drive to find and fuel new
For example, much of Texas is
grappling with dwindling and uncertain water supplies caused by a 7-year
drought. The result: Texas agencies are hurrying to develop new water sources
and secure reliable future supplies with a focus on reclaimed wastewater. But
with limited allocations coveted, disputes normally surrounding water are
beginning to extend to wastewater.
One tool to help provide
clear direction is a water master plan — a comprehensive assessment of a
system’s current performance and its future requirements. These documents are
adaptable, living products that provide direction for planning, management,
policy, funding, and engineering.
Even in places where water
supplies are feeling less of a pinch, reuse is gaining popularity. For example,
the Riverside (Calif.) Public Utilities Department reestablished its recycled
water program to meet future planning efforts and state-mandated conservation
goals. The first thought was to pursue landscape irrigation, but a careful
review showed that indirect potable reuse actually might be the more effective
Of course, the work doesn’t
end once a program is put in place. All water systems — but especially
reclaimed water systems — need to ensure reliability and safety for users.
That’s the reasoning behind Washington state’s water reclamation and reuse
standards uniting asset management and engineering reliability to help water
reuse systems protect users even if the systems were to fail.
Also in this issue
The Metropolitan Sewer District of Greater Cincinnati uses a
team-focused approach to implement best practices and produce fast results.
Learn five steps to successfully navigate the current and future worker
Flow regulation reduces maintenance and media replacement in manhole
cover odor control devices.
Create a plan to maintain wastewater ultraviolet systems and ensure compliance.