WARRENDALE, PA, Nov. 22, 2005 -- Originally built as a primary treatment plant in 1957, the Middletown, Ohio, Wastewater Treatment Plant (WWTP) was upgraded to a secondary treatment in 1971. Today, the 26 MGD activated sludge plant serves a population of 55,000 as well as the local paper industry.
The Middletown plant management decided to switch from using gaseous chloirne to sodium hypochlorite for disinfection. In reviewing chemical delivery systems, Middletown wanted to find an alternative to distributing 15% sodium hypochlorite under pressure. "We wanted to avoid the potential for problems associated with leaks and off-gassing in a pressurized system," says Wastewater Treatment Manager Steve Thompson.
Ultimately, the chemical feed system selected by the plant's consulting engineer utilizes vacuum induction to provide precise dosing of sodium hypochlorite and high-speed chemical dispersion. The gaseous feed system was replaced with two LVN-2000 Liquid Chemical Feed Systems, equipped with a Water Champ® Chemical Induction Unit (CIU), from USFilter's Stranco Products, to draw and meter sodium hypochlorite from supply tanks to the point of application...
To learn how they did it, click here.
To learn more about chemical feed vacuum induction, click here.
Siemens Water Technologies (www.siemens.com/water), delivers cost-effective, reliable water and wastewater treatment systems and services to municipal, industrial, commercial and institutional customers worldwide. The division "Water Technologies" -- which includes USFilter (www.usfilter.com) -- is part of Siemens' Industrial Solutions and Services Group (I&S), which provides innovative solutions and services designed to improve competitiveness in processing and manufacturing industries and in infrastructure. In fiscal 2004, I&S employed a total of 30,000 people worldwide and achieved total sales of EUR 4.290 billion [US$5.06 billion].
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