Xylem Wastewater Case Studies

71. Equipment Chosen For Efficiency And Reliability In Lift Station Overhaul 3/4/2015

    The 5.8 million gallon per day (mgd) Fairwood Lift Station, one of 76 major stations in the Hot Springs system, experienced frequent overflows. Particularly, the station struggled during heavy rainfall events or when pumps clogged because of increasingly popular "disposable" products such as duster heads, cleaning cloths, and disinfecting wipes, which can build up on the leading edge of the pump impeller and become entangled, reducing the efficiency of the pump or even causing a complete stoppage.

72. Community On The Florida Keys Uses Decentralized System To Meet Future Effluent Standards Cost Effectively 3/1/2015

    The community of Marathon has had success bucking the trend to large centralized treatment plants and complex sewer networks. Under orders to improve the quality of its effluent, the community opted out of a $181 million plan for one large treatment facility and connecting sewers, choosing instead to build five smaller decentralized plants, each treating between 200,000 and 400,000 gallons per day, at a total cost of $91 million.

73. Quick-Response Maintenance Team Minimizes Cost And Impact Of Pump Outage 3/1/2015

    When water makes contact with the electrical controls in a wastewater treatment plant the results can be costly, and the response can test a plant’s major service supplier.

74. N-Pumps Eliminate Clogging, Cut Energy Bills, And Eliminate Unscheduled Maintenance Calls In Wisconsin 2/15/2015

    In the village of Hartland, Wisconsin, submersible pumps at the village’s lift stations were frequently becoming clogged, resulting in emergency service calls to remove debris.

75. Sturbridge POTW: Greater Capacity For High Flow Events, Enhanced Clarification For New Regulations 12/16/2014

    Sturbridge, Massachusetts historically suffered from periodic blooms of filamentous bacteria that caused bulking in the secondary clarifiers of their three activated sludge package plants.

76. Concord, Massachusetts WWTP - A Low-Cost, 20-Year Solution To Ever-Tightening Phosphorus Limits 12/16/2014

    Prior to 2007, Concord, Massachusetts wastewater treatment plant operated under a NPDES permit that allowed a seasonal phosphorus limit of 0.7 mg/L. But with the issuance of a new five-year permit with a phosphorus limit of 0.2 mg/L and the probability that future limits could reach as low as 0.05 mg/L, Concord needed a treatment solution that would be reliable and cost-effective today and over the long term.

77. VLR® System For Biological Treatment Case Study 10/8/2014

    Economic development has its price and sometimes calls for major upgrades to a community’s wastewater treatment facilities.

78. Michigan Utility's New Pumps Underscore Advancements In Wastewater Handling 3/18/2014

    Ypsilanti’s pumps, originally put into service in 1982, became priority candidates for replacement after operating ten years beyond their expected 20 year service life. The Ypsilanti Community Utilities Authority (YCUA), included the project in the utility’s Master Plan.

79. Submersible Pumps Eliminate Flood Damage Concerns At LaGuardia Airport 1/23/2014

    During Hurricane Sandy, La Guardia Airport’s five stormwater pump stations lost power, resulting in flooding of an estimated 100 million gallons of water.  The Port Authority of New York & New Jersey quickly moved up its planned renovations and installed nine axial flow pumps capable of moving large volumes of water at low heads. The propeller-type pumps have motors that are invulnerable to submersion during high-water incidents, improving the airport’s stormwater control, flexibility, and operational efficiency.

80. WWTP Reaches Clog-Free Operation With Self-Cleaning Impellers 1/22/2014

    As with many plants modified for activated sludge treatment, the existing infrastructure at the Adams Field Wastewater Treatment Plant in Little Rock, AR, allowed rags and other debris to clog the impellers of the submersible pumps. One of the plant’s two 15-horsepower pumps was replaced with an 18-horsepower RAS submersible pump with a self-cleaning impeller, virtually eliminating the clogging problem by simply pumping away any debris that reaches the pump intakes.