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.
WEFTEC 2014 sends ripples far and wide
breaks records for exhibition, New Orleans attendance
Orleans — a city inextricably linked to and defined by water — hosted the
world’s largest annual water quality conference and exhibition, WEFTEC® 2014,
from Sept. 27 to Oct. 1. This year’s event featured a record-breaking 28,155 m2
(303,075 ft2) of exhibition space as well as 20,385 registrants,
representing the largest WEFTEC attendance ever in the Crescent City.
Operations Challenge 2014
Velocity from the Virginia Water Environment Association earned an
unprecedented fifth-consecutive Division 1 win at Operations Challenge 2014.
This 20-page section includes articles on several teams, judges, and benefits
of the 27th annual competition. It also includes tons of photos and
full-color infographics briefly describing each event. Read full article (open access)
Seeking sustainable biosolids management solutions through a TBL lens
of wastewater solids can be viewed from many perspectives. Utility managers who
step back far enough to see the big picture — in this case, energy resource
recovery in the larger context of overall sustainability — have an exemplary
point of view.
resource utilities of the future commonly focus on resource recovery, and many
of these forward-thinking utilities use triple-bottom-line (TBL) analysis to
help make decisions about opportunities for long-term sustainability. TBL
analysis is a way of evaluating organizations, processes, and projects through
a balanced assessment of economic, environmental, and social impacts. It is
relatively simple to grasp and is used widely by government and industry
A model solution
at MIT generate power from salinity differences in river and wastewater
at the Massachusetts Institute of Technology (MIT; Cambridge, Mass.) are
studying the limits of scalability of a well-known technology called pressure
retarded osmosis (PRO), which uses two different water streams with varying
salinity levels to produce energy.
Coming in the next issue:
Stepping through treatment
the flow of wastewater, especially in high flow situations, can be complicated.
Luckily, the ingenuity of the water sector coupled with technological
developments means new flow control regimens are available.
example, the City of Ottawa, Ontario, implemented real-time control (RTC) to
minimize combined sewer overflows (CSOs). In addition to CSO reduction, RTC
also has provided a side benefit of greater control, understanding, and
maintenance of the collection system. The RTC system consists of flow control
structures that are operated automatically and dynamically in response to
real-time sewer conditions. This system has helped the city cost-effectively
meet CSO objectives by maximizing use of existing infrastructure.
the flows to the water resource recovery facility is just the first step. Once
there, the flows need to be controlled and managed again to make the most of
the treatment processes in place. The Bowery Bay Water Resource Recovery
Facility in New York City optimized its biological nutrient removal process by
adjusting primary effluent flow distribution to each of the four passes of the
step-feed secondary treatment system. Optimizing flow distribution enabled more
efficient nitrification and denitrification by balancing solids retention time
for nitrification while still providing adequate primary effluent carbon for
sometimes additional processes are needed to meet permit limits. That’s the
case in Wisconsin, where numerous permits are being drafted with future total
phosphorus (TP) limits of 0.075 mg/L or lower.
2013, several communities decided to be proactive and initiate demonstration
testing of differing types of technologies. They wanted to verify the
performance of newer disc filters and ballasted flocculation technologies, and
each community witnessed a technology that could achieve less than 0.075 mg/L
TP, at times as low as 0.05 mg/L.
in this issue:
of the industry. This annual section will explore technology, financing, and
resource recovery trends for 2015.
right tools for process control. Testing online analyzers for biological nutrient
the wealth. A water recycling facility in the California Bay Area gives away
water to help mitigate the drought.
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