8.1. SR 03-18-2013 - Laserfiche WebLink

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SECTION 6.0 RECOMMENDATIONS AND IMPLEMENTATION 6.1 Recommended Wastewater Treatment Improvements The recommended wastewater treatment improvements consist of improvements outlined under Design Option No. 2 and the Great River Energy Biosolids Option. One exception to this is the improvements to the UV system. UV system upgrades will match what was outlined for Design Option No. 1. When future flows reach the design requirements for Option No. 2 the UV system will be towards the end of its useful life and further upgrades to the UV equipment will be done at that time. The Great River Energy Option for biosolids treatment was selected due to its dramatic cost savings over the other biosolids treatment options. These improvements will include the following items: 1. Addition of a grit cyclone to the grit classifier. 2. Construction of two new primary clarifiers and replacement of the existing clarifier equipment. 3. Improvements to the existing trickling filters including recycle pumping and controls. 4. Construction of a 1.8 MG aeration basin which will require construction on the land to the south of the existing wastewater treatment facility. 5. Construction of two new buildings, one to house the RAS/WAS pumps and one to house the aeration blowers and biosolids storage transfer pumps. 6. Construction of a new control building which will include upgraded electrical controls, lab space and garage space. 7. Installation of covers on the final clarifiers. 8. Improvements to the chlorine feed system for the sand filters. 9. Installation of another UV unit in the existing spare channel. 10. Installation of a sludge transfer line and necessary pumps to send biosolids to Great River Energy. 11. Improvements to the overall controls system for the entire facility. The total project cost for the recommended improvements is presented in Table 6.1. City of Elk River—T12.104758 Page 31 Wastewater Treatment Facility Plan Prepared by Bolton&Menk,Inc.