net positive sd 2016 net zero water • tim kohut
DESCRIPTION
Presentation is the Green Dinosaur, Inc. portion of the #NP16 "Toward Net Zero Water In Affordable Housing In Southern California" session. ©2016 Green Dinosaur, Inc.TRANSCRIPT
NET POSITIVECONFERENCE
A GREEN DINOSAUR PRESENTATION WITH TIM KOHUT
REDUCTION…CONSERVATION…REUSE…AFFORDABLE HOUSING
A GREEN DINOSAUR PRESENTATION © 2016
HOW BAD IS THE DROUGHT…?
EL NINO WILL SOLVE CALIFORNIA’S PROBLEMS, RIGHT…?
EL NINO WILL SOLVE CALIFORNIA’S PROBLEMS, RIGHT…?
DROUGHT IMPACTS ON CALIFORNIA RESERVOIRS…
HOW EXPENSIVE IS OUR WATER…?
DEEP WATER CONSERVATION: FIXTURES, LANDSCAPE, REUSE…?
HOW?• Analyze… • Budget… • Design / Coordinate • Plancheck… • Implement… • Operate…
DEEPER THAN CONSERVATION: WATER REUSE. WHAT’S POSSIBLE?
ANAL
YZE
DEEPER THAN CONSERVATION: WATER REUSE. WHAT’S POSSIBLE?
ANAL
YZE
• Water Closets • Urinals • Trap primers (floor drains, floor sinks) • Irrigation…and other uses approved
by the Authority Having Jurisdiction
• We have more gray water supply than we can use in non-potable uses. • What else can be done?
DEEPER THAN CONSERVATION: WATER REUSE. WHAT’S POSSIBLE?
ANAL
YZE
• Clothes washing demand is 181,069 gallons/year, which is still less than the available amount of water.
DEEPER THAN CONSERVATION: WATER REUSE. WHAT’S POSSIBLE?
ANAL
YZE
• Chapter 16 allows the Authority Having Jurisdiction to determine permissible uses. • Couldn’t clothes washing be an approved use? • What’s the risk of using treated gray water (colorless, odorless) for washing clothes?
Going to the sewer! Will need to be potable water
THE COST OF GRAY WATER: DOES IT PAY?
ANAL
YZE
SUPPLY AND DEMAND: WE CAN DO IT ALL WITH GRAY WATER, BUT…
ANAL
YZE
BACK TO GRAYWATER: ISN’T THERE FLEXIBILITY HERE?
• Chapter 16 allows the Authority Having Jurisdiction to determine permissible uses
• Couldn’t clothes washing be an approved use? • What’s the risk of using treated gray water
(colorless, odorless) for washing clothes?
ANAL
YZE
• Chapter 17 of the Plumbing Code allows the use of rainwater to wash clothes. • Do we need two systems? One for gray water, one specifically for rainwater
used only to wash clothes?
DEEPER THAN CONSERVATION: RAINWATER - POSSIBLE USES?
ANAL
YZE
RAINWATER - WHAT HARVESTING RAINWATER IN A DESERT LOOKS LIKE…
• 30 Unit Affordable Housing Project • 175,200 gallons to wash clothes,
annually. • Green boxes represent months
where there is adequate rainfall. • Red boxes show months where
there is inadequate rainfall. • Need to build a tank that holds
103,680 gallons to get through the dry months.
• 2 - 50,000 gallon tanks, 12’ in diameter, 70’ in length, just to wash clothes!!!
ANAL
YZE
THE COST OF GRAYWATER, AND THE POSSIBLE PAYBACK: WHY INVEST?
ANAL
YZE
PLANCHECK AND REGULATORY APPROVALS, LESSONS LEARNED….
• Talk to your building officials early. • Case management meetings as you
design is ideal (try to make the plan checker part of the design team - fewer surprises is better for all).
• NSF 350 approval of system a pathway for approvals - but there approved systems are limited.
ANAL
YZE
DESI
GN /
COOR
DINA
TE
IMPLEMENTING, INSTALLING….
IMPLEMENTING, INSTALLING….
DESI
GN /
COOR
DINA
TE
IMPLEMENTING, INSTALLING…
IMPL
EMEN
T
IMPLEMENTING, INSTALLING…
IMPL
EMEN
T
IMPLEMENTING, INSTALLING…
IMPL
EMEN
T
OPERATING, MAINTAINING…
OPER
ATE
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A GREEN DINOSAUR PRESENTATION © 2016