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The Silicon Valley Advanced Water Purification Center, which commenced operations in 2014, is the largest advanced water purification plant in Northern California.

By William H. Burroughs, BALPURE┬« Product Line Manager, Severn Trent De Nora

The Ministry of Defence (MOD) is one of the United Kingdom's largest landowners with approximately 600,000 acres consisting of some 4,000 built and rural sites. Providing water and wastewater services to the remote, rural sites can be quite a challenge, including providing power for the water meters at these sites. The meters are often a considerable distance from the nearest power source, and installing the electrical wiring required isn't cost effective.

Since China's Contaminant Emission Standards for Urban Wastewater Treatment Plants were officially brought into effect in 2003, they have been strictly enforced by the country's environmental protection authorities. When a large wastewater treatment plant in China's largest city needed to improve its treatment capabilities to meet Class 1B discharge standards, it selected a system proven at facilities around the world to provide superior nitrification, BOD reduction and filtration of suspended solids in aerobic biological treatment applications.

Located 15 miles from Tulsa, Okla., lies the City of Glenpool, whose motto is "Creating Opportunity." Perhaps the motto was first inspired in 1905, when a Glenpool oil gusher started a boom of growth in the area that earned the City the nickname, "the town that made Tulsa famous." With an expanding population that grew nearly 30 percent between 2000 and 2010, Glenpool boasts one of the region's healthiest economies.

In 1896, the City of Macon, Missouri's chief benefactor funded the construction of several commercial buildings, as well as the city's first sewer system. One hundred sixteen years later, Macon's wastewater treatment plant made a major technological upgrade in order to meet the Missouri Department of Natural Resources' (MDNR) new disinfection requirements.

Historically, chlorine gas safety at wastewater treatment facilities involved some basic procedures for the handling, transportation, storage and change-out of chlorine cylinders, containers and related equipment. These procedures included checking for leaks using ammonia vapors, restraining cylinders and containers, supplying an eyewash, basic change-out procedures, simple first aid, and, perhaps, supplying a leak detector.

For more than three decades, wastewater treatment plants have faced increasingly stringent regulations regarding total maximum loads for nutrient discharges. During that period, deep bed denitrification filters have proven to be an effective treatment technology used by wastewater plants to meet low total nitrogen (TN) limits. But cold water temperatures in more northern locales have proven to be a challenge to the effectiveness of the denitrification process. Recent wastewater treatment plant operating results, however, have shown that deep bed down flow filters are as reliable as tertiary treatment to remove suspended solids and achieve lower effluent nitrogen levels in cold weather conditions.

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