As part of its complex
wastewater infrastructure project, the City of Austin, Texas,
recently hired AOC (Collierville, Tenn.) and ECS Environmental Solutions
(Belton, Texas) to create an odor-control system for its new 6.3-km (3.9-mi)
wastewater tunnel to increase capacity for the downtown district and facilitate
residential and business growth in the area.
ECS provided the
odor-control equipment, including AOC’s Vipel® resin, for more than
300 m (1000 ft) of fiberglass ductwork and additional accessories. The ductwork
ranges in diameter from 300 to 1800 mm (12 to 72 in.). Approximately half of
the ductwork is buried and had to be able to withstand thousands of pounds of
high-density traffic. Additional elements of the project include field joint
kits, flexible connectors, control and back-draft dampers, bolt gaskets, and
two fiberglass exhaust fans rated at approximately 1130 m3/min
AOC product leader Scott
Lane provided technical assistance to reformulate the resin to meet the
challenging conditions, which included temperature extremes and high-density
The largest drinking
water purification plant in Europe under construction in Ravenna, Italy,
feature GE Water & Process Technologies (Trevose, Pa.) ZeeWeed 500 membrane
technology for advanced water treatment.
Once operational, the new
drinking water plant will treat an average flow of 95 million L/d, enough water
to serve approximately 400,000 people. GE will provide the technology to the
engineering, procurement, and construction joint venture led by Torricelli Srl
(Terranuova Bracciolini, Italy), in partnership with Degrémont SpA (Paris). The
facility features 40 cassettes filled with ZeeWeed 500 modules and distributed
in eight filtration trains.
Ravenna is located on
the east coast of Italy near the Adriatic Sea and part of the Mediterranean
Sea. Several years ago, Romagna Acque–Società delle Fonti SpA, the public
company in charge of the water wholesale supply for Italy’s Romagna region,
selected membrane technology to produce high-quality drinking water in an area
often affected by long periods of drought. The region’s drinking water source
is the Po River, the longest river in Italy, which has a high variation of
solids and turbidity, especially after rain.
The Rancho California
near San Diego gradually has been replacing all gas-chlorine
disinfection units with MicrOclor onsite hypochlorite generators manufactured
by Process Solutions Inc. (Campbell, Calif.). By the end of summer, the
district’s Elm Street Pump Station is expected to be operating the district’s
46th hypochlorite generator, which also will be the first to be used for
The principal use for the
water will be irrigation for various users, including a sports park and golf
courses. The peak flow rate is 20,000 L/min (5200 gal/min), and the new
hypochlorite system will be an MC-200 with a capacity of 90.7 kg/d (200 lb/d)
of free available chlorine.
The district serves 120,000 people in the
city of Temecula, along with portions of the city of Murrieta and the
unincorporated regions of southwest Riverside County. The service area includes
1500 km (940 mi) of water mains, the Vail Lake Reservoir, and 47 groundwater
The Washington (D.C.) Suburban Sanitary
Commission (WSSC) in Laurel, Md.,
has adopted Echologics’ (Mississauga,
Ontario) acoustic pipe-condition assessment service under an $850,000 contract
to assess the condition of selected water-distribution mains.
Echologics is assessing
the condition of 56 km (35 mi) of cast-iron distribution mains ranging from 150
to 350 mm (6 to 14 in.) in diameter that are scheduled to be replaced by WSSC
starting in July 2014. WSSC will use the data to cost-effectively identify
sections of pipe that are in the poorest condition and prioritize their
Approximately 70% of the pipes did not
require replacement, as they still had effective levels of remaining wall
thickness or were at or near their original condition. WSSC validated the
findings through extensive third-party testing of excavated samples of the
WSSC, which serves 1.8 million residents in a
service area that spans nearly 2600 km2 (1000 mi2),
selected Echologics as a result of a pilot survey conducted in March 2012, in
which more than 5330 m (17,500 ft) of distribution mains were assessed.
The Maryland Department of the Environment
has awarded a Bay
Restoration Fund grant of $54,900 to the Town of Elkton, Md., for the town’s
“performance optimization” of plant operations at the Elkton Wastewater
Treatment Plant. The funds will be used to defray costs associated with the
facility’s enhanced nutrient removal (ENR) operation and maintenance
Bay Restoration Funds are financed by water
resource recovery facility users to upgrade Maryland’s facilities with ENR
technology so the facilities are capable of achieving wastewater effluent
quality of 3 mg/L total nitrogen and 0.3 mg/L total phosphorus.
Operated through a public–private partnership
by Severn Trent Services (Fort Washington, Pa.) since 1993, the facility was
upgraded to ENR technology to improve water quality in Big Elk Creek. The
upgraded facility is reducing effluent nitrogen to the Big Elk River and
ultimately to Chesapeake Bay by 80% and phosphorus by 70%.
Cleanup of the city of Kuala Lumpur’s river
in Malaysia is being aided with stormwater technology from Hydro International
(Bristol, England). More than 100 of the company’s Downstream Defender®
advanced vortex separators are being installed at strategic locations in the
city’s network of drains and tributaries that discharge into the Klang and
Located at the
confluence of the two rivers, Kuala Lumpur is seeking to shift the rivers from
their current Class III-V status (water quality not suitable for bodily
contact) to a Class II-b (clean enough for recreational use) by the year 2020.
The city has an annual rainfall of nearly 2400 mm, with peaks up to 280 mm in
April and November.
The orders from Kuala
Lumpur are the largest ever made for the Downstream Defender and follow
successful trials of the advanced vortex separation technology for the National
Hydraulic Research Institute of Malaysia.
Xylem Inc. (White
recently announced two major contracts in East Asia. The
company won a $2.9 million contract from the Beijing Drainage Group Co. Ltd. to
install Xylem’s Flygt® pumps in 19 pumping stations in downtown
Beijing. The new submersible centrifugal pumps will improve the stations’ water
storage capability and prevent overflow by providing more-efficient drainage
and flood control.
Beijing Drainage Group is
a wholly state-owned wastewater utility established with the approval of the
Beijing municipal government.
Xylem also has designed
and installed the first ICEAS Advanced Sequencing Batch Reactor (SBR) and
ultraviolet municipal wastewater treatment solution in Vietnam to improve the
water quality of the Saigon River. This project will treat domestic wastewater
in the region, which has a population of 175,000 people. The new wastewater
treatment plant, located in Thu Dau Mot City, Binh Duong province, began
operation in May.
Enviro Engineering Corp.,
a business unit of Saigon Water Infrastructure Corp. based in Ho Chi Minh City,
partnered with Xylem on the project.
Consisting of Xylem’s
WEDECO TAK55 open-channel ultraviolet disinfection system, the Sanitaire ICEAS
Advanced SBR Process Solution, the system includes diffusers, decanters,
blowers, and monitoring and controls, as well as a variety of Xylem’s Flygt
N-technology pumps and compact mixers. The system replaces traditional
technologies and has an average capacity of 17,650 m3/d.
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