Recycling Treated Municipal Wastewater for Industrial Water Use

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TM2: Sampling Plan and Results Recycling Treated Municipal Wastewater for Industrial Water Use Samples were collected at four Council WWTPs: Blue Lake Empire Metropolitan Seneca 3.0 Sampling Results The sampling program developed for this project provided an initial base of information that was used for various tasks in the project, including: general characterizations of effluent water quality for Minnesota WWTPs plant-specific information to compare the effluent quality of the Council’s four largest WWTPs This technical memorandum serves to document the data and provide summary information on the effluent quality of the four Council WWTPs evaluated. 3.1 General Summary The constituents analyzed in this project’s sampling program, indicate that hardness and salt concentrations occur at concentration thresholds of concern for a range of industrial water uses. Similar to the results of Technical Memorandum 5, Wastewater Treatment Plant Effluent Quality, which reviewed general water quality parameters for all of Minnesota’s WWTPs, the NPDES permitted constituents for the four WWTPs were well below required limits and had low variability in the samples measured. Table 4 provides the mean and standard deviation of the samples collected for the Fall 2006 and Spring 2007 sampling periods. The recommended limits for each constituent as it relates to cooling water uses, is provided in the third column. Exhibit A provides additional statistics for this table, such as minimum and maximum values, and the number of samples the statistics are based upon. It also contains recommended limits for various industrial water uses in a format similar to Table 4. Exhibits B-D provide data for each WWTP. The Fall 2006 sampling data were evaluated with time series plots to look for any outliers and see if any trends existed. Given that this is a small data set (8-28 samples), this effort was used more to screen and identify any gross trends. Additional data will need to be reviewed over a longer period of time to define any trends. 6 Craddock Consulting Engineers In Association with CDM & James Crook TM2-Sampling_0707.doc
Table 4. Wastewater Recycling Sampling Program Summary Results 1 Constituent Unit Limit 2 Alkalinity (as CaCO3) mg/L 20-350 Mean St Dev 3 Mean St Dev Mean St Dev Mean St Dev 293 10 246 20 157 15 184 14 Aluminum (Al) mg/L 0.1 0.022 0.008 0.023 0.006 0.030 0.004 0.024 0.002 Ammonia (NH3) mg/L 24 0.182 0.068 0.2 0.3 0.216 0.34 0.117 0.110 Bicarbonate (HCO 3) mg/L as CaCO 3 25-200 300 8 256 31 157 20 182 6 Calcium (Ca) mg/L 50 93.2 3.8 82.2 4.5 72.2 4.4 62.9 5.3 Carbonaceous Biochemical Oxygen Demand (CBOD) mg/L
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Acknowledgements This study was con
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Contents Recycling Treated Municipa
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Contents Recycling Treated Municipa
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Executive Summary Vision Executive
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Section 1: Introduction 1.1 Project
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Table 1.2. Water Use in Minnesota,
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Section 1: Introduction Recycling T
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1.5 Summary Section 1: Introduction
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Section 2: Recycled Wastewater Dema
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Figure 2.9. Ground Water Contaminat
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Table 2.8. Ethanol Plant Capacity a
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2.7 References Section 2: Recycled
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Section 3: Recycled Wastewater Syst
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Water Quality Overview The total co
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Industrial Water Quality Concerns S
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Emerging Contaminants of Concern Se
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3.4 Storage and Transmission Overvi
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Cost by Standard Industry Categorie
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Costs and Planning Considerations S
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Section 4: Implementation Considera
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Economic Incentives and Risk Assess
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Section 5: Summary and Potential Ne
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Long-Term Vision Section 5: Summary
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Exhibit A: California Water Recycli
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Metropolitan Council Recycling Trea
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Contents Section 1 - Introduction C
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Craddock Consulting Engineers In As
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Section 1 Introduction Craddock Con
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Craddock Consulting Engineers 2-1 I
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Section 2 Implementation Considerat
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Table 2.4. Examples of State Water
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Craddock Consulting Engineers 3-1 I
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Section 3 Inventory of Major WWTPs
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Figure 3.6. Industrial Reuse Custom
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Figure 3.7b. Ground Water Availabil
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") Figure 3.8c. Cedar River Watersh
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") ") ") ") Figure 3.10c. Lower Mis
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Figure 3.12c. Mississippi River - H
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Figure 3.14b. Rainy River Watershed
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") Figure 3.16c. St. Croix River Wa
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Figure 3.18 Metro Area Industrial R
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G G Flying Cloud Dr !! G! G Figure
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Figure 3.22. Rogers WWTP - Industri
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G G G! Dodd Rd GG Figure 3.24. Rose
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G Figure 3.26. Hastings WWTP - Indu
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State Hwy 36 ! Figure 3.28. St. Cro
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Water Use Code Categories Minnesota
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Minnesota Water Use for All Categor
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Air Conditioning 0.2% Waterworks 15
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Minnesota Water Use, 2000-2004 - St
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Minnesota Water Use in 2004 (withou
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Minnesota Water Use in 2000 (withou
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UseCode by Year Minnesota Power Gen
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Water Use (MGD) Water Use (MGD) 350
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Minnesota Industrial Processing Fac
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Minnesota Industrial Processing Fac
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Water Use (MGD) Water Use (MGD) 120
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Water Use (MGD) Water Use (MGD) 13.
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Overview There are no federal regul
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Appendix B Status of Water Reuse Re
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Table 4. Examples of State Water Re
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Setback Distances Appendix B Status
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WATER USE (MGD) WATER USE (MGD) 3.5
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Table 3.9a. Industrial Water Use in
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Table 3.10a. Industrial Water Use i
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Table 3.10d. Industries in the Lowe
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WATER USE (MGD) WATER USE (MGD) 8 7
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Table 3.11d. Industries in the Minn
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Table 3.11d. Industries in the Minn
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WATER USE (MGD) WATER USE (MGD) 12
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Table 3.12c. Industries in the Miss
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Page 278 and 279: WATER USE (MGD) WATER USE (MGD) 2.5
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Page 282 and 283: Table 3.17c. Industries in the West
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Page 290: Minnesota DNR Waters 2005 Ground-wa
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Page 296 and 297: Permit No. Organization NAICS Code
Page 310 and 311: Metropolitan Council Recycling Trea
Page 312 and 313: TM2: Sampling Plan and Results Recy
Page 326 and 327: Recommended Limits for Various Indu
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Page 331 and 332: MCES Blue Lake Plant Final Effluent
Page 333 and 334: Date Day of Wk MCES Blue Lake Plant
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Page 348 and 349: Exhibit D Metropolitan (Metro) WWTP
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Metropolitan Council Recycling Trea
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Section 5 - Costs Table of Contents
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TM3: Recycled Wastewater System Com
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WWTP 1 - 2 - 3 - 4 - 5 - 1 Treatmen
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o Synthetic medium o Two-stage Surf
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Table 13 WATER REUSE SYSTEM COST OF
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Cost of Service, $/1000 gallon 1.00
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Cost of Service, $/1000 gallons 8.0
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Appendix A Water Reuse Regulatory E
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Table A-1. 2000 California Water Re
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California Department of Health Ser
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Other Media Type Filters Fuzzy Filt
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Appendix B TECHNICAL MEMORANDUM Rec
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Appendix B Reclaimed Water Transmis
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Exhibit 1 Transmission Main Cost To
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Pipe Installation Data (DR 18 PVC P
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Equipment Costs (with O&P) Item Des
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Water Reuse Pipe Line Construction
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Construction Unit Costs Item (2006
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Crew Costs (with O&P) St. Paul Pres
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Capital PROJECT Cost Curves for Rec
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Diam (in) Annual Average Day Flow A
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Diam (in) Annual Average Day Flow A
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Pipe Capital Project Cost, $ Millio
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Pipe Capital Project Cost, $/1000 g
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Annual Pipe Average Annual Velocity
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Pipe Capital Project Cost, $ Millio
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Exhibit 3 Water Reuse System O&M Co
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Diam (in) Annual Average Day Flow (
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Pumping Cost, $/1000 gallons 0.095
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Water Reuse System Estimated Cost o
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WATER REUSE SYSTEM COST OF SERVICE
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Appendix D-1 Water Reuse System Cos
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Water Reuse System Estimates of Pro
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Cost Curves as Basis for Tertiary 1
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Secondary Treatment Assumptions Sus
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Craddock Consulting Engineers 1 In
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TM4: WWTP Effluent Quality Recyclin
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Frequency of Occurrence, % Frequenc
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No. of Plants Total Permitting Desi
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Frequency of Occurrence, % Frequenc
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No. of Plants Total Permitting Desi
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Craddock Consulting Engineers 1 In
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1.0 Introduction This technical mem
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Exhibit A Regulatory Stakeholder Me
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MCES Recycling Treated Wastewater f
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Municipal Wastewater Reuse Regulato
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Exhibit B Industry Stakeholder Meet
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Recycling Treated Wastewater For In
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Institutional Issues Topic Discussi
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Institutional Issues Topic Discussi
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Exhibit C Broader Base Stakeholder
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Recycling Treated Municipal Wastewater for Industrial Water Use

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