WE&T Magazine

WET_cover1_April14 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.

 


April 2014, Vol. 26, No.4

Featured Articles

Managing the deluge

Feat1 resized 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

Feature 2 kabouris 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.  

 

News

Is salt the ‘sleeping dragon’ of wastewater pollutants?

news

With U.S. EPA developing new chloride limit criteria, the water quality field eventually could face significant challenges    

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.  

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Coming in the next issue:
WET_cover1_May14 90

Supply side

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 solutions. 

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 option. 

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   

  • Accelerating change. The Metropolitan Sewer District of Greater Cincinnati uses a team-focused approach to implement best practices and produce fast results.   
  • Help wanted. Learn five steps to successfully navigate the current and future worker shortage.   
  • Media mediation. Flow regulation reduces maintenance and media replacement in manhole cover odor control devices.   
  • Bright future. Create a plan to maintain wastewater ultraviolet systems and ensure compliance.