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8.1. SR 03-18-2013
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8.1. SR 03-18-2013
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TABLE OF CONTENTS <br /> SECTION 1.0 INTRODUCTION <br /> 1.1 Purpose......................................................................................................................1 <br /> 1.2 Report Organization...................................................................................................I <br /> SECTION 2.0 DESIGN CONSIDERATIONS AND PARAMETERS <br /> 2.1 Planning Period..........................................................................................................2 <br /> 2.2 Planning Area.............................................................................................................2 <br /> 2.3 Customer/User Projections.........................................................................................3 <br /> 2.4 Wastewater Flows......................................................................................................4 <br /> 2.4.1. Historical Flows..............................................................................................4 <br /> 2.4.2. Projected Wastewater Flows...........................................................................5 <br /> 2.5 Wastewater Loadings.................................................................................................6 <br /> 2.5.1. Historical Wastewater Loadings......................................................................6 <br /> 2.5.2. Projected Wastewater Loadings......................................................................6 <br /> 2.6 Effluent Discharge Limits...........................................................................................8 <br /> SECTION 3.0 EVALUATION OF EXISTING WASTEWATER TREATMENT FACILITIES <br /> 3.1 General......................................................................................................................9 <br /> 3.2 Liquid Treatment Process...........................................................................................9 <br /> 3.2.1. Screening........................................................................................................9 <br /> 3.2.2. Flow Measurement.........................................................................................9 <br /> 3.2.3. Grit Removal................................................................................................10 <br /> 3.2.4. Primary Clarifiers..........................................................................................10 <br /> 3.2.5. Trickling Filters............................................................................................10 <br /> 3.2.6. Aeration Basin..............................................................................................11 <br /> 3.2.7. Final Clarifiers..............................................................................................11 <br /> 3.2.8. Filters...........................................................................................................11 <br /> 3.2.9. Disinfection..................................................................................................11 <br /> 3.2.10. Electrical/Controls........................................................................................12 <br /> 3.3 Biosolids Treatment Process ....................................................................................12 <br /> 3.3.1. Anaerobic Digestion.....................................................................................12 <br /> 3.3.2. Biosolids Storage Tank.................................................................................14 <br /> SECTION 4.0 WASTEWATER TREATMENT FACILITY IMPROVEMENTS <br /> 4.1 General....................................................................................................................16 <br /> 4.1.1. Optimum Operation/Expansion of Existing Facilities.....................................16 <br /> 4.1.2. Regionalization.............................................................................................16 <br /> 4.1.3. Construction of a New Facility......................................................................16 <br /> 4.2 Wastewater Treatment Facility Improvements—Liquid Process................................17 <br /> 4.2.1. Design Option No. 1.....................................................................................17 <br /> 4.2.1.1. Screening..................................................................................................17 <br /> City of Elk River,Minnesota T12.104758 Page i <br /> Wastewater Treatment Facility Plan Prepared by Bolton&Menk,Inc. <br />
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