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Project Understanding <br /> The liquid stream options described in the Facility Plan recommend making improvements to the <br /> existing wastewater treatment facility to handle future growth and NPDES permit changes.The <br /> liquid stream alternatives studies included two design options: one for all growth in the existing <br /> Urban Service Area and the other option for the entire Urban Service Area plus some outside <br /> developments. These two liquid stream options have different flow and loading requirements; <br /> however,the treatment process for both options is the same. The significant liquid stream <br /> improvements will include the following: <br /> 1. Two new primary clarifiers <br /> 2. Trickling filter improvements <br /> 3. The addition of an activated sludge process <br /> 4. Covers for the final clarifiers and a new clarifier for design option 2 at some point in the <br /> future <br /> 5. Sand filter improvements <br /> 6. UV system improvements <br /> 7. Electrical and control upgrades <br /> 8. A new control building <br /> For the solids stream,the facility plan indicated two main options: sending the biosolids to Great <br /> River Energy(GRE) and a heat drying option.The option to send the biosolids to GRE provides <br /> the City of Elk River with a unique opportunity for biosolids treatment.The GRE option is the <br /> most cost effective option from both a capital and an operation and maintenance perspective. It is <br /> critical that this option be fully addressed with GRE since there is such a tremendous benefit to the <br /> City of Elk River. The GRE option is the pumping of biosolids directly to GRE and the biosolids <br /> would become part of the GRE incineration process. In return,the City would take the clarifier <br /> water from GRE directly into the WWTF.The other biosolids option,heat drying,is also a very <br /> good option for the City.However,this option should only be used if all opportunities to partner <br /> with GRE are unsuccessful.The heat drying option would include a building for the heat drying <br /> equipment and the 90 plus percent dried product would be land applied to existing City owned <br /> land. <br /> Wastewater Treatment Facility Improvements I City of Elk River, Minnesota 2 <br />