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March 2013 Emerging Technologies Nitrogen and Phosphorus Removal prepared 2008 Technology Summary Modified University of Cape Town (MUCT) Process Objective: State of Development: Enhanced removal of phosphorus and nitrogen from Adaptive Use. wastewater. Description: The Modified University of Cape Town (MUCT) process provides efficient nitrogen removal by sending the RAS to the anoxic zone. The anaerobic reactor, is located upstream of two anoxic reactors. RAS is subjected to the first anoxic reactor stage. There is an internal recycle from the first anoxic reactor to the anaerobic reactor, and another internal recycle from the oxic reactor to the second anoxic reactor. Comparison to Established Technologies: The MUCT process is different from the UCT process. MUCT includes two anoxic stages in series. Influent wastewater is fed to the anaerobic reactor, which is located upstream of the anoxic reactors. Returned activated sludge (RAS) is returned to the first anoxic reactor. There is an internal recirculation from the first anoxic reactor to the anaerobic reactor. Removal of nitrogen in the aeration basin may vary from 40 to 100 percent and the effluent nitrate should be sufficiently low so as not to interfere with the anaerobic contact zone. Plug flow configuration of the aeration basin allows the anoxic zones in the first section of the plant to be low, while the endogenous oxygen demand at the end of the aeration basin and the DO level will increase to allow for the required nitrification and phosphate uptake. Nitrates not removed in the aeration basin will be recycled to the anoxic zone. Therefore, efficient overall nitrogen removal is achieved more economically. Available Cost Information: Approximate Capital and O&M Costs: Cost estimates are dependent upon local requirements and specific application and economy of scale applies. For example, uniform annual cost of a 100,000 GPD plant is estimated to be about $272,075 based on an interest rate of 6 percent for a 20-year period. Vendor Name(s): Installation(s): N/A King County South AWTP, WA Key Words for Internet Search: Modified UCT process, RAS anaerobic reactor Data Sources: “Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal,” Water Quality Management Library, Volume 5, Second Edition, 1998. Principles and Practice of Nutrient Removal from Municipal Wastewater, Lewis Publishers, Second Edition, 1991. Process Flow Diagram for Modified UCT Process Wastewater Treatment and In-Plant Wet Weather Management 3-29PDF Image | Emerging Tech for Wastewater Treatment
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