WE&T Magazine

Feb_cover_WET_90Water 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.

 


February 2014, Vol. 26, No.2

Featured Articles

Taking the plunge

Feature 1 art 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

feature 2 art

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.  

 

News

After Typhoon Haiyan

news Relief agencies and their industry partners support water and sanitation recovery in the Philippines  Read more

Coming in the next issue:
March_cover_WET_90

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 action. 

  • Cost-effective application of peracetic acid for high-level disinfection. A Florida 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, Minn.   
  • It’s always something. Understanding the connections among biological phosphorus removal, anaerobic solids digestion, dewatering, and land application.