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Emerging Technologies March 2013 Small Site updated 2012 Technology Summary Deep Shaft Activated Sludge/VERTREATTM Objective: Increased oxygen transfer in the activated sludge process to decrease power requirements, saving both capital and operating costs. Description: State of Development: Innovative. Variations of this technology have been applied worldwide for more than 3 decades but it has not been widely adopted. The Deep-Shaft Activated Sludge/VERTREATTM process is a modification of the activated-sludge process. VERTREATTM essentially uses a vertical “tank” or shaft in place of the surface aeration basins used in a conventional system. The result of this vertical configuration is a ten-fold increase in the dissolved oxygen content of the mixed liquor, which increases the level of biological activity in the bioreactor. The process can accommodate high-organic loading with lower aeration supply due to the enhanced oxygen transfer (a function of both increased pressure at depth and longer bubble-contact time). Comparison to Established Technologies: Reduced footprint requirements. Lower power consumption and simple controls resulting in reduced O&M. Much higher-rate system due to increased oxygen transfer in process. Available Cost Information: Approximate Capital Cost: $3 to $5 per installed design gallon of flow. Approximate O&M Costs: Dependent on power costs. Roughly half the aeration power requirement due to increased oxygen-transfer efficiency. Lower maintenance costs as a result of having no pumps or diffusers in the core system. Vendor Name(s): NORAM Engineering and Constructors Ltd. Suite 1800, 200 Granville Street Vancouver, BC, Canada V6C 1S4 Telephone: 604-681-2030 Fax: 604-683-9164 Web site: www.noram-eng.com Key Words for Internet Search: Installation(s): City of Homer – Public Works Department 3575 Heath Street Homer, AK, USA 99603 Telephone: 907-235-3174 Fax: 907-235-3178 Email: jhobbs@ci.homer.ak.us Deep shaft process, activated sludge, wastewater treatment, oxygen transfer, high rate, BOD, aerobic Data Sources: www.noram-eng.com www.vertreat.com Email communication with the vendor. 3-22 Wastewater Treatment and In-Plant Wet Weather ManagementPDF Image | Emerging Tech for Wastewater Treatment
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