Water Efficiency and Reuse Facebook’s Menlo Park Campus Lauren Bonar Swezey Global Sustainability and Outreach Manager.

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Presentation transcript:

Water Efficiency and Reuse Facebook’s Menlo Park Campus Lauren Bonar Swezey Global Sustainability and Outreach Manager

Campus Water Use: The Challenge Growth! Building use Onsite meal prep (three meals/day) Cleaning Outdoor use Ongoing drought

Water efficiency The Low Hanging Fruit

Goal #1: Reduce Outdoor Water Use Eliminated lawn at Classic Campus Courtyard Sports field Campus entry Planted natives Utilize new power washing system Uses recycled water Saves15k gal/week

Green roof: 90% natives Replacing lawn with Natives at Classic Campus

BIG Savings Achieved 55% reduction in outdoor water use Q vs.Q3 2015

Goal #2: Reduce Indoor Water Use Dishwasher retrofit Hobart dishwashers each save 1.5m gallons annually Kitchen water audit Sub-metering for all kitchens Added High efficiency spray nozzles Efficient steamers and woks Extra low flow aerators Best practices by kitchen staff Achieved 22% reduction

Goal #3: Shift our Water Footprint Reusable plates in all cafés 1.3 gallons of water vs gallons Shifting to onsite composting

Implement Onsite Composting Installing 10 ton Anaerobic digester Byproduct: Graywater Produces 1,400- 2,000 gals/daily REUSE for grinding and landscape use

Water Reuse The BIG Solution

Treat and reuse for toilet flushing and irrigation Drain and Fill Constructed Wetland

MBR System Membrane bioreactor Screening Biological treatment Ultrafiltration: particles, bacteria and viruses Ultraviolet light disinfection Chlorination

Permitting and approval Meetings began in 2015 City permitting City of Menlo Park County permitting and support San Mateo County Health Department County Supervisors (2) State permitting Regional Water Quality Control Board Local office: SF Bay RWQCB Division of Drinking Water (DDW)