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.
Taking the plunge
An efficient monitoring program can be a
cost-effective method of providing a large quantity of detailed information
that can be used to evaluate water quality and compliance with water quality
standards (WQS), especially when the fallout from not meeting those standards
can be in the hundreds of millions of dollars. Though establishing a long-term
monitoring program may appear to be as easy as dropping a meter into water to
collect data over time, there are various steps to developing and implementing
a comprehensive, defensible program. It requires a tremendous amount of
planning and preparation.
Finding the right system balance
Regulatory limits for water
resource recovery facility (WRRF) effluents are becoming more stringent. As a
result, WRRFs are being challenged as operating margins grow tighter. Operators
are faced with achieving greater and/or more consistent performance to meet
National Pollutant Discharge Elimination System (NPDES) discharge limits with
existing and new facilities.
Challenges at one WRRF led to
the use of on-line analyzers that helped develop and implement process control
approaches that lead to more stable and efficient operations.
After Typhoon Haiyan
Relief agencies and their industry partners support
water and sanitation recovery in the Philippines
Coming in the next issue:
Fast and affordable fixes
In a perfect world,
maintenance tasks are proactive and planned. The goal is to keep things running
smoothly and avoid major disruptions to both service and established schedules.
One utility’s managers and
operators used that method for years on their septic tank effluent pumped
sewers. They knew that too little maintenance can lead to premature equipment
failure and dissatisfied customers. However, they also discovered the flip
side: Too much maintenance can lead to high costs. So, the utility called on
the system manufacturer to develop operation and maintenance protocols to
provide balance between maintenance and cost effectiveness. The result was
invisible to users and shaved more than 15% off the utility’s costs.
At another utility, the
challenge wasn’t the cost so much as timing. At the beginning of an assessment
and rehabilitation program for the entire in-plant drain system, a manhole
upstream of a 1500-mm (60-in.) line showed signs of severe corrosion. A manned
inspection revealed the pipe was near collapse. This discovery set in motion an
emergency repair that involved the owner, engineer, contractor, and supplier.
What had begun as an assessment and rehabilitation program quickly turned into
an emergency repair requiring collaboration, communication, and quick
Cost-effective application of peracetic acid for
facility considers several alternatives to satisfy permit requirements.
Smooth sailing with a startup plan.
Lessons learned when integrating or switching to a
membrane bioreactor system.
Side by side.
Comparing oxidation ditch and membrane bioreactor processes in Hutchinson,
It’s always something.
Understanding the connections among biological phosphorus
removal, anaerobic solids digestion, dewatering, and land application.