Documents
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Leopold elimi-NITE® Powers Chesapeake Bay Renewal in Howard County, MD
Howard County, Maryland, has taken a leading role in restoring the Chesapeake Bay ecosystem through a $92 million upgrade to its wastewater treatment infrastructure. Central to this effort is the installation of Xylem’s Leopold elimi-NITE® 2.0 denitrification system, which significantly reduces nitrogen and phosphorus levels in effluent discharge. Combined with advanced UV disinfection and mixing technologies, the system's daily reductions include 37,000 pounds of suspended solids, helping to reverse decades of nutrient pollution and protect aquatic life in the Bay.
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Leopold Filterworx® performance filter system in Columbus, Georgia
The North Columbus Resource Facility recently completed a $12-million replacement of its settled water filtration, removing the existing Wheeler filters, their three-part media and 10-inch poured-concrete underdrains, which were no longer efficient. Prior to the filter rehabilitation, the utility’s backwash procedure consisted of a hydraulic-only backwash where the high-rate wash cycle lasted up to 20 minutes. Backwashing each dual cell filter used 150,000 to 200,000 gallons of water. The filters then operated up to an hour in rewash or filter-to-waste operation to reach the desired output of <0.09 Nephelometric Turbidity Unit (NTU).
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London Heathrow's network of 120 pumping stations needed a smart, energy efficient solution to address chronic clogging in aircraft toilet wastewater
Xylem’s Flygt Concertor, with integrated intelligence that uses sensor monitoring, self-optimising technology and adaptive hydraulics, was the perfect smart, energy-efficient processing method.
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Lower levels of iron in raw water improves mining production
A southern mining company was developing salt dome gas storage facilities that use water to mine salt from the domes shaping them so they can be used to store natural gas inside under high pressures. The raw water used for the mining process contained high levels of iron (5-8 ppm) resulting in equipment fouling and high maintenance costs.
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Manufacturer of Baker's Yeast Rises Above Its Wastewater Challenges
AB Mauri was constructing a large, state-of-the-art yeast manufacturing plant in Veracruz, Mexico. The project included the need for a unique wastewater treatment facility. Sugarcane molasses used as the fermentation growth substrate for the yeast during production results in wastewater containing high concentrations of organic matter.
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Marathon wastewater treatment plant meets effluent standards
Like many cities in the Florida Keys, Marathon, Florida had historically used septic systems to treat wastewater. The community added secondary treatment several years ago, but the facility was unable to prevent nitrogen and phosphorous contamination of sensitive Gulf of Mexico coastal waters.
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Massive cover delivers valuable biogas benefits for Melbourne water
Melbourne Water is a water wholesaler in Victoria, Australia, and is ranked among the top performing Australian and international water utilities. Melbourne Water delivers over 430 billion litres (114 billion gallons) of safe drinking water and treats over 300 billion litres (79 billion gallons) of sewage from across Melbourne.
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Meeting tomorrow's drinking water requirements today
The Moon Township Municipal Authority (MTMA) provides water service to 8,500 water customers in Moon Township; 9,500 sewage customers in Moon, Crescent and South Heights; and wholesale sewage treatment services to three other townships. MTMA originally was a well only water supplier. To meet growing demand raw water from the Ohio River was added in 2003.
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Mobile Clarification Enables Coal-Pile Runoff Compliance
Evoqua Water Technologies was contacted by a leading global engineering, consulting and construction company, to provide wastewater treatment assistance during the final stages of commissioning at a power generation facility located in the southeast US. The station is a 665 megawatt generator which utilizes pulverized coal boiler technology...
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Mobile solution resolves drinking water contamination
The City of Fresno, CA was forced to seek a solution to return previously contaminated and closed drinking well sites online in order to answer it's population increases and possible summer drought conditions These wells had been removed from service due to nitrate levels above the State of California maximum contamination level.
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Modular cover helps town expand anaerobic sewer lagoon
As part of an upgrade to the town’s wastewater treatment facility, Ranchester was considering an expansion of its existing lagoon infrastructure to include anaerobic pre-treatment. The project involved dividing an existing aerated lagoon into two separate cells.
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New cover provides operational and safety benefits for water plant
The Griswold Water Treatment Plant is part of Aurora Water, the utility that manages water and wastewater in the city of Aurora, Colorado, USA. This direct filtration plant treats 80 million gallons of water per day (302,800 m³/d).
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Nordic City Takes Proactive Approach to Reduce NRW While Gaining Valuable Condition Assessment Data on Critical Water Mains, Avoiding Costly Failures
As part of a pre-emptive program to address non-revenue water loss and understand the condition of their pipes, Gothenburg wanted to conduct a condition assessment and leak detection survey on a series of large diameter transmission mains. The three pipelines were built in the 1960s and made of cement and steel, ranging in size from 1000 mm to 1200 mm.
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Nutrients from growing coastal communities threaten bio-diversity
Bio-diversity in Florida’s St. John’s River estuaries is dependent on clean water. Growth in the area’s coastal communities is adding nitrogen and phosphorous nutrients to the river through wastewater discharges.
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Odor control covers end neighbors’ complaints
The South Dearborn Regional Sewer District in Lawrenceburg, Indiana, provides regional wastewater treatment services for three cities and an international distillery. The 6 mgd treatment plant is located in an area of high population growth and is surrounded by many retail operations and other commercial developments.
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OMNIFLO® SBR MAX system expands capacity and addresses flows
Constructed in the 1980s, the A.J. Brown plant is the largest of three wastewater plants in the city of Huntsville. This upgrade will expand capacity, improve energy efficiency and better handle peak wet weather flows in a small footprint.
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On-site chlorine generation offers city a safe solution
The city of Scottsdale, Arizona, a community of more than 200,000 residents was historically totally dependent on groundwater resources. By the mid 1980's, the city began putting together a multi-faceted water resource program to provide the community with a long-term sustainable water supply.
