October 2012, Vol. 24, No.10


The Bathurst Regional Council in New South Wales, Australia, installed a supernatant recycling system for its drinking water filtration plant to help conserve potable water and cut costs.  

The recycle system recovers and disinfects filter backwash, a byproduct of the reverse flushing of sand filters. The new system involved the construction of a supernatant pumping station and associated pipework to enable the automatic recycling of supernatant from the sludge lagoons into an in-ground well and then into the first chamber of the rapid-mix tank. CST Wastewater Solutions (Lane Cove, New South Wales) supplied a Berson (Nuenen, Netherlands) ultraviolet disinfection system that was fitted between the pumping station and the rapid-mix tank.  

Disinfection of backwash supernatant (clear liquid that collects above sediment) is not widely used in Australia but can recover up to 10% of raw water supplies while avoiding discharge flows into river systems, according to a CST press release. 


Beverly Hills, Calif., awarded a $5 million contract to rehabilitate more than 41,100 m (135,000 ft) of small-diameter sewer pipelines. The city hired Insituform Technologies LLC (St. Louis) to perform the work. 

The company will install cured-in-place pipe in 200-, 250-, and 300-mm-diameter (8-, 10-, and 12-in.-diameter) sewer pipelines throughout Beverly Hills. Specific locations include sewer pipelines along Rodeo Drive and Wilshire Boulevard. 

The work was scheduled to begin in September and to be completed within 12 months. 


The VanDusen Botanical Garden Visitor Center (Vancouver, British Columbia) and the new UniverCity Childcare Facility at Simon Fraser University (Burnaby, British Columbia) both installed decentralized wastewater treatment plants manufactured by ECOfluid Systems Inc. (Vancouver). Both treatment plants use upflow sludge blanket filtration (USBF®) technology designed to meet the stringent requirements of the Living Building Challenge.  

Both projects are contending to become the first certified Living Building in Canada. As part of the criteria, projects must collect and treat all generated wastewater onsite. The hydraulic flexibility of the USBF process is well suited for the projects. In addition, the process provides high treatment efficiency, including biological nutrient removal.  


The Pittsburgh Water and Sewer Authority (PWSA) hired Veolia Water North America (Chicago) to provide interim executive management services, leading 270 public employees in the delivery of efficient water and wastewater services to more than 300,000 people in the greater Pittsburgh area. 

A team of water and wastewater experts from Veolia will help PWSA improve the utility’s customer service and performance levels by conducting in-depth diagnostics of current operations, developing specific recommendations for improvement, and supporting PWSA employees in implementing initiatives aimed at reaching new performance metrics. Veolia Water executive Jim Good will lead the effort as PWSA’s interim executive director.  


The San Antonio Water System has agreed to terms with Lucid Energy (Portland, Ore.) to build the first demonstration site of the LucidPipe™ Power System in Texas. The new in-pipe hydropower system, which is slated for construction in early 2013, is designed to produce clean, low-cost renewable energy from the flow of water in municipal water pipelines.  

The 60-kW in-pipe hydropower system will include three LucidPipe spherical turbines inside of one section of 600-mm (24-in.) steel water pipe at the San Antonio Water System. The installation will be part of the Regional Carrizo Water Supply Project that will deliver up to 21.2 million m3 (17,200 ac-ft) of water per year from the Carrizo Aquifer to the city of San Antonio.  

“Utilizing our water infrastructure to generate renewable energy fits our philosophy of environmentally smart solutions because it taps an existing resource — water moving through our pipelines — to provide low-impact, low-cost renewable energy,” said Steve Clouse, chief operating officer and senior vice president of the San Antonio Water System.  


Chevron Mining, a subsidiary of Chevron (San Ramon, Calif.), the second-largest U.S.-based integrated energy company, installed a prefabricated wastewater system to treat up to 56,800 L/d (15,000 gal/d) for as many as 300 workers in a remote camp at its Questa, New Mexico, mining camp. 

The system is an Ecologix Environmental Systems (Atlanta) Zeo-Clear Zeo 20. Built into standard ISO 6-m (20-ft) and ISO 12-m (40-ft) containers for easy global shipping, Zeo-Clear systems can be installed and brought on-line in as few as 2 weeks. 


The City of Wood Dale, Ill., awarded its 2012 Sanitary Sewer Evaluation Survey project to the RJN Group Inc. (Wheaton, Ill.). The project will include complete surface inspection of 140 manholes, smoke testing, and sewer video review of 9100 linear m (30,000 linear ft) of sanitary sewer line, private property inspections at 600 single family homes and other buildings, and dye testing as needed to confirm the presence of potential illegal connections found during building inspections. 

Once the inspections and data collection are complete, the company will analyze all field data and develop recommendations for rehabilitation.  


The Town of Cary, N.C., and its municipal partners Apex, Morrisville, and Holly Springs, contracted to receive two biological odor-control systems as part of a Western Wake Regional Wastewater Management Facility construction initiative. The two systems, manufactured by Envirogen Technologies Inc. (Kingwood, Texas), will use proven biofiltration technology to remove odors and 99% of hydrogen sulfide from air at the wastewater operation’s West Cary and Beaver Creek pump stations. The West Cary site will feature Envirogen’s new BTF-4500 modular vessel design, while the Beaver Creek site will receive a custom-designed built-in-place biofilter. The company also will provide onsite customer support and training to assist in startup, and a 10-year warranty covering media life.