September 2011, Vol. 23, No.9

Projects

In July, the P Street Wastewater Treatment Plant (WWTP) in Fort Smith, Ark., received a new odor control system. The system, manufactured by Envirogen Technologies Inc. (Kingwood, Texas), will remove hydrogen sulfide and other odor-causing compounds from the air at the WWTP.

The new system consists of a single-chamber biofilter to treat air from the plant’s influent pump station, pretreatment system, bioselector, and inlet channels. The system can handle peak hydrogen sulfide concentrations of 20 ppm (by volume) at an airflow rate of up to 340 m3/min (12,000 ft3/min) and achieve greater than 99% removal. It also will remove 90% of organic-reduced sulfur compounds and produce an outlet odor concentration not to exceed 300 dilutions-to-threshold. Dilution-to-threshold is a measure of the number of dilutions needed to make the odorous ambient air nondetectable.

 

The Upper Trinity Regional Water District, located north of Dallas, has purchased three MicrOclor hypochlorite generators for use in potable water disinfection. Each generator, manufactured by Process Solutions Inc. (Campbell, Calif.), will produce 907 kg/d (2000 lb/d) of free available chlorine capacity for a total capacity of 2720 kg/d (6000 lb/d).

The generators are being installed at the 265,000-m3/d (70-mgd) Thomas E. Taylor Regional Water Treatment Plant in Lewisville, Texas.

 

The Orange County Water District (Fountain Valley, Calif.) has chosen Parsons (Pasadena, Calif.) to provide construction management services for the $128 million initial expansion of the district’s Groundwater Replenishment System (GWRS) in Fountain Valley, Calif. Scheduled for completion in 2014, this project will increase the treatment capacity of the GWRS by 38 million m3/yr (31,000 ac-ft/yr), bringing the total capacity of the system to 127 million m3/yr (103,000 ac-ft/yr).

GWRS is the largest advanced water treatment facility of its kind in the world. It takes highly treated wastewater and purifies it through membrane filtration, reverse osmosis, and advanced oxidation using ultraviolet light and hydrogen peroxide.

This highly purified water will be percolated into the Orange County Water District’s groundwater basin to supplement its drinking water supplies, as well as to augment the seawater intrusion barrier, which prevents seawater from contaminating the groundwater. The GWRS has a secondary benefit of reducing the amount of treated wastewater discharged to the Pacific Ocean off the coast of Huntington Beach, Calif. 

 

Construction has begun on a $45 million facility that will convert the methane generated at the Point Loma Wastewater Treatment Plant in San Diego into natural gas. The facility, which is being built by BioFuels Energy LLC (Encinitas, Calif.), will enable the City of San Diego to earn about $300,000 a year over the next 10 years by selling its methane to the company, according to a city fact sheet.

Some of the natural gas produced will be used to help power the city’s South Bay Water Reclamation Plant, as well as two facilities at the University of California San Diego. The city will save roughly $80,000 a year in energy costs at the South Bay plant. The city also expects an additional $500,000 in revenues over the next 5 years as a result of the contract.

 

A ribbon-cutting ceremony marked the successful completion of $37 million in improvements at Apra Harbor Wastewater Treatment Plant, which serves the U.S. Naval Base Guam. These improvements are the first of many steps outlined in a compliance agreement between the U.S. Environmental Protection Agency and the U.S. Department of the Navy for the treatment plant and its collection system.

Remaining upgrades in the agreement involve the repair and replacement of more than 48 km (30 mi) of sewer lines, force mains, and laterals; hundreds of manholes; and dozens of wastewater lift stations. The Navy also has agreed to institute a base-wide source control program to minimize the release of metals, oils, and other pollutants that are not removed by the wastewater treatment plant.

The upgrades are expected to cost more than $50 million. The wastewater infrastructure work covers the entire Naval Base Guam and is scheduled for completion by 2016.

 

The government of Israel recently selected Sorek Desalination Ltd., a company formed by IDE Technologies (Kadima, Israel), 51%, and Hutchison Water International Holdings Pte. Limited (Hong Kong), 49%, to build and operate the Sorek Sea Water Reverse Osmosis (SWRO) facility. The desalination plant, which will have a total planned capacity of 150 million m3/yr, will be the largest plant of its kind in the world.

The plant, which is scheduled to be completed in 2013, will cover 100,000 m2 and deploy advanced membrane desalination technology, including the use of 406-mm (16-in.) membranes for the first time in a large-scale facility. This technology is designed to increase water output and cost savings, as well as reduce energy consumption. Water produced from the plant will be delivered directly to Israel’s national water distribution system.

The project is a significant milestone in both desalination capacity and water cost, which at just around $0.55/m3, will result in substantial savings for the Israeli water market, according to a press release.

 

Two Indiana cities have chosen to use Sentinel® ultraviolet (UV) disinfection systems at their drinking water production plants. The cities of Indianapolis and Fort Wayne chose to install the systems, which are manufactured by Calgon Carbon Corp. (Pittsburgh).

Indianapolis will install 12, 300-mm
(12-in.) systems at its Fall Creek plant to increase protection against Cryptosporidium, Giardia, and other surface water pathogens. When installed this winter, the systems will treat up to 166,500 m3/d (44 mgd) of drinking water.

Separately, Fort Wayne will install three Chevron 1219-mm (48-in.) UV reactors at its Three Rivers water filtration plant as part of a retrofitting project. The new UV reactors, which are scheduled to be installed in June 2012, are capable of treating up to 272,500 m3/d (72 mgd), according to a Calgon Carbon press release.

 

In June, the Aquapolo tertiary wastewater treatment plant in Sao Paulo, Brazil, received Galaxy 152-mm (6-in.) SpinKlin disk filters, which have a flow rate of 2400 m3/h and are designed to retain solids with a diameter larger than 400 µm. The filters, manufactured by Amiad Filtration Systems (Kibbutz Amiad, Israel), serve as a pretreatment step before the plant’s wastewater passes through biological treatment and ultrafiltration to reach the required standard for reuse.

The wastewater treatment plant is the first of its kind in the Southern Hemisphere and the fifth largest in the world dedicated to the production of reuse water for industrial purposes that uses treated wastewater as raw material, according to an Amiad press release.

The City of Cape Town (South Africa) Department of Water and Sanitation has awarded a R187-million (US $27.3-million) contract to Veolia Water Solutions & Technologies South Africa, a subsidiary of Veolia Water Solutions & Technologies, to upgrade and extend the treatment capacity at the Bellville Wastewater Treatment Works.

With this upgrade, the Bellville plant will feature the largest membrane bioreactor (MBR) in the country to date, and its capacity will increase by 20 ML/d, to 70 ML/d (average dry weather flow). The 20-ML/d MBR will be separate from the existing activated sludge plant.

The wastewater entering the new plant will pass through coarse screens for degritting; filter through fine screens; undergo anaerobic, anoxic, and aerobic treatment; and go through ultrafiltration as well as solids dewatering.

Currently in the basic engineering design phase, the plant is scheduled for commissioning in 2013.

 

Grundfos Pumps (Olathe, Kan.) is providing expertise and, potentially, capital resources to participants in the 2011 edition of the Cleantech Open, the world’s largest clean-technology business competition.

The Cleantech Open runs the world’s largest clean technology business competition. Its mission is to find, fund, and foster entrepreneurs with ideas that address today’s most urgent energy, environmental, and economic challenges. A 501(c)(3) not-for-profit organization, the Cleantech Open provides the infrastructure, expertise, and strategic relationships that turn clever ideas into successful global clean technology companies, according to a Cleantech press release.

Since 2006, through its one-of-a-kind annual business competition and mentorship program, the Cleantech Open has enabled hundreds of clean-technology startups to bring their breakthrough ideas to fruition, helped alumni contestants raise more than $300 million, and created an estimated 2500 green-collar jobs, the release says.

Grundfos executives will serve as subject-matter experts, mentors, and judges to early-stage Cleantech startups. The executives will provide these entrepreneurs with the knowledge and business relationships that will increase the entrepreneurs’ ability to have a tangible effect on economic growth and environmental change.

 

In June, the San Francisco Public Utilities Commission awarded a $259 million construction contract to the joint venture of Dragados USA (New York), Sukut Construction Inc. (Santa Ana, Calif.), and Flatiron West Inc. (San Marcos, Calif.) to rebuild the Calaveras Dam, along with a $45.3 million contract to Contri Construction (Las Vegas) for the installation of the eastern segment of an additional pipeline as part of the San Joaquin Pipeline System.

“Calaveras Dam is the largest contract in our $4.6 billion Water System Improvement Program [WSIP], and this pipeline contract represents the last of the WSIP Central Valley projects to be awarded,” said General Manager Ed Harrington. “Both projects are important to ensuring our Hetch Hetchy regional water system can consistently provide the highest-quality drinking water to our Bay Area customers.”

 

In June, an apartment complex in Wilmington, Mass., became the first site in North America to install a PURON™ PLUS packaged membrane bioreactor wastewater treatment system. The system, manufactured by Koch Membrane Systems Inc. (Wilmington, Mass.), is designed to meet stringent surface discharge limits for biochemical oxygen demand, total suspended solids, and total nitrogen.

The packaged system consists of two membrane trains, each containing one PURON membrane module, as well as ancillary equipment, controls, engineering, and technical services. The system is designed for an average flow of 90,800 L/d (24,000 gal/d) and peak flow of 121,000 L/d (32,000 gal/d).

 

New Braunfels Utilities (NBU; New Braunfels, Texas) has selected Perma-Liner Industries (Clearwater, Fla.) to perform a manhole-to-manhole pipe relining project. NBU is working on a project to reline 990 m (3240 ft) of 150- and 200-mm (6- and 8-in.) reinforced concrete pipe mainlines, in lengths ranging from 15 to 137 m (50 to 450 ft) between manholes, according to a Perma-Liner press release.

In total, the NBU Sewer/Wastewater System contains approximately 533 km (331 mi) of line and serves more than 18,900 customers. 

 

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