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® 2011 has it all: a great location, a diverse technical program, interesting tours of local facilities, an expansive exhibition, and the chance to win a car
Expanding Orange County’s Groundwater Replenishment System
The Groundwater Replenishment System (GWRS) in Southern California is one of the world’s largest indirect potable reuse projects. Jointly funded and constructed by the Orange County Water District (OCWD) and the Orange County Sanitation District (OCSD), the 265,000-m3/d (70-mgd) GWRS supplements existing water supplies by providing a reliable, high-quality source of water to recharge the Orange County Groundwater Basin and protects the basin from further degradation due to seawater intrusion.
By recycling water, the system also provides peak wastewater flow disposal relief and indefinitely postpones the need for construction of a new ocean outfall by diverting treated wastewater flows that would otherwise be discharged to the Pacific Ocean.
Side by side by side
In 2004, the Metropolitan Wastewater Management Commission (MWMC; Springfield, Ore.) decided to add tertiary filtration to its 114,000-m3/d (30-mgd) Eugene/Springfield Oregon Water Pollution Control Facility (WPCF).
To select the most appropriate filtration technology, in 2008 MWMC conducted parallel pilot testing of cloth disk filtration, compressible medium filtration, and granular medium filtration. These three different filtration technologies have not previously been tested side by side for secondary effluent filtration.
Greenhouse turns wastewater solids into organic fertilizer
It may not be possible to make a silk purse out of a sow’s ear. But the Natchez, Miss., Wastewater Treatment Plant (WWTP) may be doing something even better. Its engineers have found an innovative way to turn wastewater solids into Class A biosolids using only the power of the sun.
The transformation was made possible thanks to a desire to rid the city of an environmental headache, coupled with an opportunity to build a low-cost, solar-powered greenhouse, according to David Gardner, Natchez city engineer. The solution is one that other communities facing high solids management costs might want to consider.
Coming in the next issue:
Sustainability has evolved from a buzzword and a luxury few utilities could afford, to a necessity few utilities can afford to do without. Today, even the most resource-strapped utilities can realize incremental benefits by embracing sustainable practices. For instance, life-cycle assessments (LCAs) can help wastewater treatment plants strike a balance among competing environmental impacts. Find out how an LCA can enhance your decision-making process, and what to consider before getting started. And looking beyond the plant, learn more about a method that helps determine the impacts on watersheds.
In order for utilities to be truly sustainable, they must recruit, train, and retain the next generation of water professionals. Recognizing that training was a critical component of its strategic plan, the Union Sanitary District (USD; Union City, Calif.) replaced its informal training program with a professional, standardized method of delivering training. The result was an award-winning, 31-module training program that delivers employees a comprehensive system to manage their professional development from hire to retirement. Find out how USD’s training investment is paying off for both employees and the utility.
- An insider’s guide to preparing for certification
- Using social media for cost-effective communication and outreach
- A new generation of optical dissolved oxygen sensors
- WEFTEC preview: technical program highlights, countdown to Operations Challenge, and more
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