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Emerging Tech for Wastewater Treatment

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Emerging Tech for Wastewater Treatment ( emerging-tech-wastewater-treatment )

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March 2013 Emerging Technologies Technology Summary State of Development: Innovative. Mixing prepared 2012 Pulsed Large Bubble Mixing Objective: An innovative mixing technology by Enviromix called BioMx® reduces energy required for anoxic or anaerobic zone mixing by firing short bursts of compressed air into the zone instead of mechanically mixing it. Description: Uniquely designed nozzles produce a mass of large air bubbles, ranging from marble to softball size, which mix the water as they rise to the surface. The large air bubbles, much larger than those made by coarse bubble diffusers, are designed to minimize oxygen transfer and maintain anoxic or anaerobic conditions. The system includes a PLC to manage the timing of the air control valve firing, which gives the operator flexibility to respond to different conditions within the tank. Comparison to Established Technologies: Testing at the F. Wayne Hill Water Resources Center in Gwinnett County, Georgia showed that energy (in kW) required to mix one anaerobic cell using the BioMx® system was 45 percent less than the energy required by a submersible mixer. Also, when operated in three cells using the same compressor, 60 percent less energy was required. The manufacturer reports that the system has non-clogging, self cleaning in-tank components that require no maintenance. Available Cost Information: Not available. Vendor Name(s): EnviroMix 180 East Bay Suite 200 Charleston, SC 29401 Telephone: 843-573-7510 Fax: 843-573-7531 Email: sales@enviro-mix.com Key Words for Internet Search: Coarse bubble, Pulse mixing Data Sources: Installation(s): Testing done at the F. Wayne Hill Water Resources Center in Gwinnett County, Georgia in 2009-2010 and at the ReWa Mauldin Road WWTP in Greenville SC in 2011. Installed at the Hopewell Regional Treatment Facility, Hopewell, VA and the Center Street WWTP Mt Pleasant SC. Randall, C.W. and W. O. Randall. 2010. Comparative Analysis of a Biomix System and a Submersible Propeller Mixer: Mixing in Anaerobic Zones at the F. Wayne Hill Water Resources Center, Buford, Georgia. (Report provided in an e-mail from Clifford W. Randall on May 4, 2010). USEPA (2010) Evaluation of Energy Conservation Measures for Wastewater Treatment Facilities. Office of Water. EPA 832-R-10- 005 September 2010. http://water.epa.gov/scitech/wastetech/upload/Evaluation-of-Energy-Conservation-Measures-for-Wastewater- Treatment-Facilities.pdf Wastewater Treatment and In-Plant Wet Weather Management 6-11

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