living machine at sfpuc headquarters...sfpuc hq has two non-potable water reuse systems 1. rainwater...
TRANSCRIPT
Marsha SukardiProgram Manager for the Living MachineCivil Engineer, Wastewater EnterpriseSan Francisco Public Utilities Commission
Living Machineat SFPUC Headquarters
SFPUC HQ has two non-potable water reuse systems
1. Rainwater Harvesting System- Rainwater reused for irrigation
2. Living Machine System- Black- and greywater reused for toilet and urinal flushing
Reduces use from 12 gal/day/person5 gal/day/person
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Location of system components
How does it work?
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Living Machine Treatment Process
Primary Tank
Equalization and Recirculation Tanks Reclaimed Water Tank
Treatment Wetlands
Disinfection
Primary Tank
Primary Tank
Component Function Capacity Notes
Trash Chamber Receives sewage, settling and screening of larger solids
2,500 gal Excess sewagepumped to sewer
Settling Chamber Removal of settleableand suspended solids
7,500 gal Filtered WW flows to EQ Tank
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Living Machine Treatment Process
Primary TankEqualization and
Recirculation TanksReclaimed Water Tank
Disinfection
Treatment Wetlands
Treatment Wetlands
Vegetation supports diverse micro-organism populationsContains Engineered Gravel = Lightweight Expanded Shale (LESA)
Tidal Flow Wetlands
Polishing Vertical Flow Wetlands
Equalization and Recirculation Tanks
Tidal Flow Wetland
• Alternates filling and draining
Tidal Flow Wetlands
Tidal Flow Wetland
NH4+ NO3
- NO2-
Organic matter CO2 (g)
Next Fill and Drain cycle NO2- N2 (g)
Soluble nutrients and organic matter move from solution to aggregate and biofilm
Tidal Flow Wetland
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Equalization and Recirculation Tanks
Vertical Flow Wetland
Polishing Vertical Flow Wetlands
Vertical Flow Wetland
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Vertical Flow Wetland
Living Machine Treatment Process
Primary TankEqualization and
Recirculation TanksReclaimed Water Tank
DisinfectionTreatment Wetlands
Disinfection Equipment
2) 5μ Cartridge Filter3) Ultraviolet Disinfection
4) Tablet Chlorinator
1) 100μ Screen Filter
Living Machine Treatment
Primary TankEqualization and
Recirculation TanksReclaimed Water Tank
Treatment Wetlands
Disinfection
Operating the Living Machine
Automated control panelMechanical components based on
operator settings and sensor signals.
Human-Machine Interface (HMI)Graphical interface for remote access.
Acheivements
• Saved over 3MG of potable water• Produces high quality non-potable water• Daily maintenance and monitoring is low• Most popular building tour feature with over 2,500 visitors
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Why did we install this?
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Buildings produce water
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Non-potable demands are significant
• Up to 50% of Multi-Family residential buildings’ water demands are non-potable
• Up to 95% of Commercial building’s water demands are non-potable
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Permitting: Collaborative effort
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On-Site Water Reuse Ordinance
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History lesson: “Living Machine”
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“Design outlaws on the Ecological Frontier,” by Chris Zelov. Retreieved from http://www.ratical.org/co-globalize/DO_JohnTodd.html
History lesson: “Living Machine”
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“Design outlaws on the Ecological Frontier,” by Chris Zelov. Retreieved from http://www.ratical.org/co-globalize/DO_JohnTodd.html
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Thank you!