Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications

BRIAN GREGSON Rainwater Catchment Systems Accredited Professional Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications Blue Spring Working Group September 9, 2010

Who we are
Irrigation Contractor
Specializing in highly efficient water-conservation solutions
Drip/micro irrigation, landscape drainage
RAINWATER HARVESTING
FIRSTS:
ARCSA AP in State of FL
Permitted RHS in St. Pete
Institutional rainwater toilet flushing in St. Pete
Potable RHS in St. Pete
Potable RHS in Tampa
Permitted greywater(??) in Tampa
Shifting focus to commercial applications
www.rainwaterservices.com

Why harvest rainwater?
Preserve potable water for drinking and indoor uses
Stormwater management
L.I.D.
Contribute to responsible growth
Large volume applications = $$$$

The PROBLEM:
Population growth = greater demand on resources (power, water, etc)
Reduced reliability of groundwater
Sinkholes??
“ Finding” new water = rising production costs
Ingenuity but at what cost??
www.rainwaterservices.com Tampa Bay Water Production & Carbon Costs (‘06 – ’09 Averages) Water Type Portion of Production Average Electricity Cost ($/MG) Groundwater 71% $70 Surface Water 23% $135 Desalinated 8% $1343 Blended Product -- $194

Example: Desalination Plant
A bit more complex than a well.
There’s a reason why it’s located next to a power plant
EXPENSIVE:
Initial cost = $110M
Ongoing remediation = $158M
www.rainwaterservices.com Source: SP Times Source: Desalination & Water Resource

Rainwater Harvesting: A Sustainable Option www.rainwaterservices.com Source: www.stuckincustoms.com

Possible Uses for Rainwater www.rainwaterservices.com

$ & ¢: Volusia County www.rainwaterservices.com Volusia County Usage Rates (W+WW) Usage (gallons) Unsoftened Rates (per 1,000 gallons) Softened Rates (per 1,000 gallons) 0-7,000 $4.73 $6.16 7,001-14,000 $4.96 $6.68 14,001-21,000 $5.45 $6.89 > 21,000 $7.94 $9.39 Volusia County Irrigation Rates Usage (gallons) Unsoftened Rates (per 1,000 gallons) Softened Rates (per 1,000 gallons) 0-7,000 $2.32 $3.76 > 7,000 $4.81 $6.26

Example: Residential Family of 4
Installed cost: $20K
50 gpp x 4 x 30 = 6000 gallons per month
Unsoftened rate: $28.38; Softened rate: $36.96
Utility Rates/Potential Savings: Moderate Residential = $

Example: Condo irrigation
Installed cost: $250K
10,000 gpd x 30 = 300,000 gallons per month
Unsoftened rate: >$1,400; Softened rate: >$1,800
Per annum = $17K - $22K
Utility Rates/Potential Savings: Multifamily complex = $$$

Example: Tower Evaporative Loss
Installed cost: $1M+
25,000 gpd x 30 = 750,000 gallons per month
Unsoftened rate: ~$6,000; Softened rate: >$7,000
Per annum = $72K - $84K
Utility Rates/Potential Savings: Cooling Tower = $$$$$

Payback: ROI www.rainwaterservices.com
Capital Cost Range
$50/GPD at 10,000 GPD
$15/GPD at 500,000 GPD
(specific site conditions would dictate actual costs)
ROI
Residential: 50+ years (assumes 6000 gallons)
Condo Irrigation: 25 years (assumes 70K-100K gallons)
Cooling Tower: 10-15 years (assumes 200K-300K gallons)

Payback: ROR www.rainwaterservices.com
ROR (Rate of Return)
Residential: $32/mo x 50 = $33,089.41
Condo Irrigation: $1600/mo x 25 years = $625,787.51
Cooling Tower: $6500/mo x 15 years = $1,374,178.64
Pay yourself the monthly utility bill
Simple interest, assume 2% compounded monthly
System pays for itself, plus returns profit equal to approx 1.5x initial capital cost!!

EPA – Science and Technology Center: Kansas City, KS
www.rainwaterservices.com SITE INFO Total Facility Area: Total Water Consumption: Stormwater Reduction: Water Usage Reduction: Water Conservation Features: 71,955 gsf 3,050,556 gallons/year 40% 50% Graywater Reuse, Rainwater Harvesting, HVAC condensate recovery, deionized water recycling

EPA – Gulf Ecology Devision Laboratory: Gulf Breeze, FL
www.rainwaterservices.com SITE INFO Total Facility Area: Total Water Consumption: Water Usage Reduction: Water Conservation Features: 78,006 gsf 4,884,834 gallons/year Extensive rainwater capture/reuse for toilets, cooling tower setpoint adjustments, native

Office Complex – Twin Lakes Park
Twin Lakes Park – Office Complex: Sarasota, FL Photo courtesy of Dickinson Studios at http://www.myfloridagreenbuilding.info/Profiles/TwinLakes.html www.rainwaterservices.com Project Owner: Owner Type: Project Type: Gross Sq. Ft.: CISTERN INFO Size: Water Source: Use: Sarasota County Government Commercial Office 27,592 28,000 gallons Rainwater Flushing in water closets, irrigation

Photo credit: Timothy Hursley http://eere.buildinggreen.com/site.cfm?ProjectID=286 Rinker Hall, University of Florida Gainesville, FL www.rainwaterservices.com CISTERN INFO Size: Water Source: Use: 8,000 gallons Rainwater Toilet flushing

LEED Elementary School Remodel, St. Petersburg, FL www.rainwaterservices.com Project Owner: Project Type: CISTERN INFO Size: Water Source: Use: Jordan Park Elementary Institutional 2x 2,500 gallons Rainwater Toilet Flushing RAINWATER SERVICES FIRST BELOW-GROUND

Many thanks… www.rainwaterservices.com

Questions?
BRIAN GREGSON
[email_address]
@RainwaterServices
@RWServices
http://www.slideshare.net/RWServices www.rainwaterservices.com

Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications

by Brian Gregson on Sep 09, 2010

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Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications — Presentation Transcript

http://rainh2o.co	87
http://rainwaterservices.com	38
http://216.172.180.247	10