The New Realities of Water Recycling in San Francisco

Transcription

1 The New Realities of Water Recycling in San Francisco World-Leading Technology and Expertise in Commercial Water Recycling Gibran Farrah Manufacturers Representative Mega Western Sales Christian Park Environmental Building Strategies

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5 Supervisor Weiner s Legislation Health Code - Mandatory Use of Alternate Water Supplies In New Construction.to require that new buildings of 250,000 square feet or more of floor area be constructed, operated, and maintained using available alternate water sources for toilet and urinal flushing and irrigation; If the Water Budget Calculator assessment shows that the available supply from onsite sources exceeds the demands for toilet and urinal flushing and irrigation, 100% of those demands must be met by using the available onsite sources.

6 Purple Pipe Ordinance City ordinance since 1991 requiring installation of non-potable (purple) pipe. Owners of properties within designated recycled water use areas (see map) that have: (1) 40,000 square feet or more of new construction or major alterations to a building, (2) are subdivisions, or (3) have 10,000 square feet or more of new or existing landscaping.

7 SFPUC Non-Potable Program Grant Funding 100,000+ square feet Building = $250,000 Save 1 million gallons of potable water annually District Scale (2 or more parcels) = $500,000 Save 3 million gallons of potable water annually

8 G R E Y W A T E R

9 B L A C K W A T E R

10 S T O R M W A T E R & R A I N W A T E R

11 Single Building Scale

12 District Scale

13 1 Bligh Street Video:

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15 Sewer Mining at 1 Bligh Street

16 Government Framework in Place 2012 U.S. Guidelines for Water Reuse 2012 CA Plumbing Standards SFPUC Non-Potable Program

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18 Design Applications

19 Commissioning / Operations Must meet 100% of Temporary Permit Criteria

20 Grey/Blackwater Technology Membrane Ultra-filtration Biological Treatment Pre-treatment Disinfection & Controls Modified Membrane Bioreactor (MBR)

21 Grey/Blackwater Technology 2,600 GPD 1,250 Gallons Per Day (GPD) 7,500 GPD 13,000 GPD

22 Modular Flexibility Disinfection / Controls Skid Single Module

23 Modular Flexibility

24 Modular Flexibility

25 24/7 Remote Monitoring & Controls

26 Risk Management & Automated Controls Hazard Analysis & Critical Control Points (HACCP)

27 What Does it All Mean?

28 Value Proposition Sustainability Confronting Drought ROI

29 Increasing Water/Sewer Rates

30 Tools Make Life Easier

31 Project Evaluation INPUTS 1. Alternative Source(s) 2. End Use(s) 3. Conservation Objectives 4. Public Health / Regulations 5. First Cost 6. O&M Costs 7. Space 8. LEED Goals Analysis OUTPUTS 1. Water Balance 2. Scope / Design Options 3. Conservation Projections 4. Space Allocation 5. Life Cycle Cost Analysis (LCCA) 6. LEED Implications

32 Project Evaluation

33 Project Evaluation Low Flow (LF) and Reuse Calculator Fixture Type Consumption Daily Uses Duration (mins) Occupants Daily Water Use (gal) 1.28 gpf toilet - male (gallons per flush) ,500 1, gpf toilet - female (gallons per flush) ,500 7,680 Greywater Supply 4, gpf urinal - male (gallons per flush) , Blackwater Supply (combined w/w) 24,713 Kitchen sink gpm ,000 1,350 Toilet/Urinal Flushing Demand 10,163 Commercial Lavatory Faucet gpm ,000 1,500 Non-Potable Demand 23,301 Food Service - 3 gal/occupant ,000 9,000 Potable Demand 14,550 Showerhead gpm ,000 2,700 Total Daily Water Demand 37,851 Cooling Tower make-up 10,000 Irrigation Landscaped area, acres Irrigations per week Irrigation rate, inches WATER SAVINGS SUMMARY (Projected Annual Savings from Baseline Water Usage ) Low Flow (LF) Fixtures Only 1,998, % LF + Greywater Reuse 26.1% ,138 SYSTEM SIZE 4,200 daily savings (recycled daily) 3,090,750 8,056,997 8,056,997 Annual Work Days Low Flow Fixtures Estimates 33,651 new daily water usage 8,749,247 new annual water usage 1,092,000 annual water savings from LF % Reduction -11.1% in addition to LF water savings Total Daily Demand 37,851 Total % Reduction -26.1% LF fixtures & greywater reuse Total Annual Usage 9,841,247 Annual Savings 1,998,750 % Reduction -16.9% SYSTEM SIZE 23,301 daily savings (recycled daily) 14,550 new daily water usage 3,783,000 new annual water usage 6,058,247 annual water savings from LF % Reduction -61.6% in addition to LF water savings Total % Reduction LF + Blackwater Reuse + Sewer Mining 68.0% 14, % LF fixtures & blackwater reuse 3,783,000 new annual usage w/ sewer mining 6,058,247 Important Daily Totals (gallons) Greywater Reuse Estimates Blackwater Reuse Estimates Blackwater Reuse + Sewer Mining to Meet Non-Potable Demand LF + Blackwater Reuse 68.0% SYSTEM SIZE 23,301 daily savings (recycled daily) new daily water usage annual water savings from LF Total % Reduction -68.0% LF fixtures, blackwater reuse & sewer mining

34 Project Evaluation

35 G R E Y W A T E R C A S E S T U D I E S

36 181 Fremont San Francisco, CA 5,000 gal/day Greywater & Rainwater

37 181 Fremont Source Water: Greywater from luxury condos and commercial office Rainwater Reuse Applications: Toilet flushing Irrigation Aquacell G20 5,000 gal/day capacity

38 B L A C K W A T E R C A S E S T U D I E S

39 SF PUC Headquarters

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41 THANK YOU!! World-Leading Technology and Expertise in Commercial Water Recycling