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.
A novel solution to sanitary sewer overflows
Significant attention has been
given to the issue of combined sewer overflows (CSOs) by regulators, technical
professionals, and the public, and rightly so. By design, many CSOs discharge
untreated wastewater and stormwater directly to surface waters through managed
control points during wet weather events.
The issue of sanitary sewer
overflows (SSOs), however, has received much less attention, although SSOs may
be just as common as CSOs and more important from a water quality standpoint.
Activated sludge sleuthing
Identifying organisms as nitrifers,
phosphorus accumulating organisms, filaments, and foamers can help facility
operators troubleshoot biological nutrient-removal processes, poor digester gas
production, fecal pollution, and bulking and foaming.
Associations partner to make the case for reauthorization
WEF and WateReuse tell
U.S. Senate that funding SRF boosts economy
If the Clean Water and Drinking
Water State Revolving Funds (SRFs) are reauthorized this year in U.S. Congress,
it may be due in large part to the efforts of the Water Environment Federation
(WEF; Alexandria, Va.) and the WateReuse Association (Alexandria, Va.).
Coming in the next issue:
What lurks beneath
Beginning a sewer rehab project is
a lot like going to a horror movie. You’re nervous, but excited, going in. You
expect a few surprises, and there might be a monster lurking around the corner.
In the case of the sewer project, the monster and the surprise might be one and
This was the case for the city of
Revere, Mass. During a cleaning in preparation for some rehabilitation work on
an aging sanitary sewer, a 450-m (18-in.) diameter clay pipe collapsed beneath
a busy road. The collapse set into motion an emergency repair project that was
complicated by the location of multiple other utilities above the wastewater lines.
Essentially, the city had to conduct a major water project literally on top of
the emergency sewer repairs.
On the other side of the country,
San Diego faced its own collection system challenges. Aging infrastructure that
lacks redundancy cannot be taken out of service easily for inspection and
maintenance, but failure would lead to monstrous indirect costs and
ramifications. This means preventive measures, however difficult, are crucial.
The city inspected more than 90
access structures during 3 months. Inspection crews worked at night, during
low-flow periods, to observe the maximum amount of surface within the
structures. However, working in large-diameter, in-service pipelines required
experienced crew members and significant safety planning.
Also in this issue
A solid plan. After implementing a series of improvements to
its solids handling facilities, the City of Bethlehem, Pa., boosted
performance and decreased operational costs.
Worth its salt. A refinery finds the right treatment solution
for high salinity wastewater and spent caustic.
WEFTEC 2016 preview. Meet the Opening General Session speaker
and take a closer look at “big data.”
©2016 Water Environment Federation. All rights reserved.