Water Reuse & Wastewater Management

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Water Reuse & Wastewater Management

  1. 1. Water Reuse & Wastewater Management Sustainable Best Practices Pio Lombardo, P.E. Lombardo Associates, Inc. Newton, MA 02467 Pio@LombardoAssociates.com www.LombardoAssociates.com September 25, 2008
  2. 2. Credentials & Experience •Over 35 years’ experience in wastewater management, planning and implementation •Engineer of Record for over $200 million of wastewater management projects throughout the US •Authored numerous USEPA manuals on decentralized wastewater management •Limnology & water quality expertise •Corporative Execute for international environmental engineering firms •Design/Build/Operate Experience •Recipient of ENR Construction Man-of-the-Year Candidate Award •LAI received the ACEC Engineer of Excellence Award •Registered Engineers in 29 States
  3. 3. Project Types  Commercial Development  Residential Development  Institutional
  4. 4. EMERGENT WETLAND
  5. 5. Water Use Efficiency & Water Reuse • Minimize Potable Water Demand • Roof Runoff + Stormwater Reuse • Wastewater Reuse
  6. 6. Commercial Development Projects  Shopping Centers  Office / Retail
  7. 7. No Net Discharge System Rain Collection Wastewater Wastewater Collection Treatment Stormwater Rain Collection Treatment Storage Stormwater Landscape In-Building •No Net Discharge Irrigation Reuse •Minimizes Potable Water Demand (50-70% Reduction)
  8. 8. Malibu- La Paz Development Water Reuse – No Discharge System The No Wastewater Discharge is achieved by:  In-Building Reuse – Toilet Flushing  Landscape Irrigation – Roof Runoff & Stormwater Reuse Malibu La Paz – City Hall Village Green  11 Commercial Buildings  2 Restaurants (175 seats/each)  Proposed New City Hall
  9. 9. Malibu- La Paz Development Design Flow: 28,000 gpd / 23,000 gpd With the Water Reuse, Potable Water Demand will be 14,200 gpd… a 56% Reduction Malibu La Paz – Entry
  10. 10. Malibu Creek Plaza, Malibu, CA 16,000 gpd Shopping Center Malibu Creek Plaza • Achieving Title 22 Unrestricted Water Reuse Requirements • Equivalent to ~200 Residential Units
  11. 11. Malibu Creek Plaza, Malibu, CA
  12. 12. Malibu- Ioki Development Water Reuse – No Discharge System  Environmentally Sensitive Area, adjacent to the famous Surfrider Beach in Malibu, CA  Combination of Office & Retail buildings  Integrated Wastewater- Stormwater Irrigation System
  13. 13. Malibu- Ioki Development Design Flow: 20,800 gpd / 18,200 gpd Without Water Reuse: In-Building Water Demand = 12,970 gpd Irrigation = 10,700 gpd = 23,670 gpd With Water Reuse: Potable Water Demand = 10,185 gpd 57% REDUCTION
  14. 14. Urban – Mixed Use Development Wastewater Treatment Plant Reuse Plan
  15. 15. Commercial Development Projects  Wastewater Reuse for Toilet Flushing  Greenhouse - Wetlands
  16. 16. Dense Urban Development Wastewater Treatment Plant Reuse Plan Westwood Station On-Site Wastewater System Preliminary Economic Analsys prepared by Lom bardo Associates, Inc. - Novem ber 9, 2006 Design Flow 50,000 gpd 18,250,000 gallons per year (gpy) 18,250 1,000 gpy Annual Cost with Sewer Connection 2005 Westwood Water Use Rate $ 3.97 per hundred cubic feet (HCF) 2005 Westwood Sewer Use Rate $ 13.95 per hundred cubic feet $ 17.92 per HCF $ 23.96 per 1,000 gallons 1. Annual Water & Sewer Use Avoidance Costs 50,000 gpd 18,250 1,000 gpy Annual Water Use Cost $ 96,862 Annual Sewer Use Cost $ 340,358 Annual Total Water & Sewer Cost $ 437,219
  17. 17. Dense Urban Development Wastewater Treatment Plant Reuse Plan On-Site Wastewater Reuse System Range of Estimated Annual O&M Costs Achievable Low End Safe High End 1. Annual O&M Costs - Est. Budget Range $ 100,000 $ 150,000 2. Estimated Net Annual Savings $ 337,219 $ 287,219 3. Simple Payback Period 10 years 4. "Maximum Allowable" Capital Cost of Reuse $ 3,372,193 $ 2,872,193 System 5. Can reuse system be implemented for less than Initial Capital Cost estimate = $3,025,000 Allowable Capital Cost ? Notes: 1. Amenity value of greenhouse not considered 2. Impact of continuing rising MWRA rates - 9.8% for 2006 - not considered 3. Value of LEED points not considered
  18. 18. Residential Development Projects  Nitrogen Sensitive Coastal Areas
  19. 19. Mashpee, MA – 5,226 gpd Residential &Commercial Site •24 Units Mixed Housing (40B) DRAINFIELD PUMP •9,800 SF Commercial STATION BIOFILTER NITREX™ Drainfield FILTER Pump Station SEPTIC TANK •TN < 3 mg/l BioFilter •Monthly O&M Visits •Electricity Use - $0.75 / day •No chemical Addition NitrexTM Filter Niitrex Filter •Normal Septage Removal
  20. 20. Eastham, MA – Brackett Landing Cape Cod Residential Development Producing Water with Total Nitrogen < 3.0 mg/l Design Flow: 10,000 gpd
  21. 21. Chincoteague, VA 3,900 gpd Commercial System RECIRCULATING PEAT FILTER AEROBIC TREATMENT SYSTEM  RESIDENTIAL SYSTEM  TOTAL NITROGEN < 3 mg/l
  22. 22. Merced, CA 330 gpd Institutional System Gurr Road Septic Tank Fire Station Recirculating Media Filter NitrexTM Filter Recirculating Tank  Nitrogen Removal System as an addition to the Septic System
  23. 23. Campus Water Use and Wastewater Generation Analysis
  24. 24. Annual Residential Water & Sewer Charges for Major US Cities Typical Water Charge = $3.08 / 1,000 gallons Typical Sewer Charge = $4.63 / 1,000 gallons Typical Combined Charge = $7.71 / 1,000 gallons Boston Water Charge = $4.40 / 1,000 gallons Boston Sewer Charge = $5.39 / 1,000 gallons Boston Combined Charge = $9.79 / 1,000 gallons
  25. 25. Annual Residential Water & Sewer Charges for Major US Cities ($/1,000 gallons) Water Sewer Combined Boston, MA $4.40 $5.39 $9.79 Columbus, OH $2.62 $3.58 $6.20 Dallas, TX $2.31 $3.65 $5.97 Indianapolis, IN $2.74 $2.13 $4.87 Jacksonville, FL $2.24 $4.74 $6.98 Los Angeles, CA $2.91 $3.35 $6.26 MWRA Service Area $4.46 $6.72 $11.18 New York, NY $2.41 $3.84 $6.25 Philadelphia, PA $3.43 $4.41 $7.84 Portland, ME $3.05 $8.48 $11.53 Providence, RI $3.44 $3.79 $7.23 Saint Paul, MN $2.27 $3.55 $5.82 San Diego, CA $4.60 $5.36 $9.96 San Francisco, CA $3.33 $7.45 $10.79 Seattle, WA $4.63 $9.01 $13.64 Washington, DC $3.21 $4.51 $7.72
  26. 26. Analysis Process •Analysis of Water Use by Meter – Daily, Seasonal and Annual •Use Profile •Wastewater Generation Analysis •Identify Water Use / Wastewater Opportunities •Economic Analysis of Water / Sewer •Quantify Potential Savings •Conceptual Design & Capital and O&M Cost of Projects to Achieve Potential Savings
  27. 27. Use Profile •Wastewater Generation Analysis •Toilet Flushing/Showers/Food Related •Laundry •Laboratory •Cooling Towers and Power Plant Blowdowns •Academic Laboratory Equipment •Other
  28. 28. Cost Analysis •Financial Situation – Existing •Using Existing and Projected Water & Sewer Rate •Annual Water Cost •Annual Sewer Cost
  29. 29. Opportunities Identification •Identify Water Use / Wastewater Opportunities •Conservation •Reuse •Toilets •Cooling Towers •Irrigation •Independent Laundry Reuse Systems •Others
  30. 30. Evaluation •Conceptual Design and Capital and O&M Costs of Projects to Achieve Potential Savings •Simple Financial Analysis •Payback Plan •Return on Investment
  31. 31. Non – Domestic Water Conservation Opportunities – Project 1 Water Quantity Savings Potential 108,000 gpd Water/Sewer Dollar Savings Potential $339,000/yr •Collect •CUP Cooling Tower and Boiler Blowdown •RO Rejects •Vacuum Pump Cooling Water •Roof Rainwater •Humidifier Condensates •Treat water at Facility •Reuse Treated Effluent for Cooling Tower Make-Up •With payback of ten (10) years, simple 10% ROI $3.4 million could be spent
  32. 32. Non – Domestic Water Conservation Opportunities – Project 2 Water Quantity Savings Potential 179,000 gpd Water/Sewer Dollar Savings Potential $560,000/yr •Evaluate Underground Use of a Location for Stormwater/Wastewater Storage/Treatment Facility •Treat Stormwater/Wastewater for non-potable water use •With payback of ten (10) years, simple 10% ROI $5.6 million could be spent
  33. 33. Dispersal Systems
  34. 34. Dispersal - Drip Irrigation
  35. 35. Drip Field
  36. 36. LEACHFIELD PRSSSURE DISTRIBUTION TEST
  37. 37. LEACHFIELD (BURIED)
  38. 38. Disinfection + Emerging Contaminants Removal •UV •Ozone
  39. 39. Malibu Creek Plaza, Malibu, CA Ozone – UV Disinfection
  40. 40. Questions / Answers

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