1 Rainwater Harvest and Grey Water Liberty Wildlife Foundation Curt Truman Sambhram Patel Ankitha Rai Haley Gilles

2 LWF Water Harvesting Goals Develop a rainwater and grey water capture system for irrigation of desert plants/landscaping Devise a flow system to capture rain water to feed the wetland via bio swale design

3 LWF Objectives Independent from municipal water Net-zero water usages Capture scarce rainfall and maximize usage Design an educational water capture system To be a visionary for arid water design systems

4 How to get there: Adjusted Rainfall (Arizona)

5 LWF Total Rainwater Monthly Supply Roof + Parking Lot

6 RAIN WATER HARVESTING

7 TOTAL WATER SUPPLY & DEMAND Monthly Average (gallons) TOTAL Projected Water Use 235,655 Harvested Rainwater 10,908 Landscaping Demand 179,630 Reclaimed Grey water 8,400 Projected Water demand (excluding landscape) 56,025 Municipally- Demand Potable Water 216,347

8 Roof Harvesting System 3-stage cleaning process 1) Coarse filter insert 2) Fine filter basket (0.35 mm mesh width) 3) Sedimentation zone Web Price: $ Graf Infiltration Filter Shaft

9 Parking Lot 3-stage cleaning process 1) Coarse filter insert 2) Fine filter basket (0.35 mm mesh width) 3) Sedimentation zone Web Price: $ Graf Infiltration Filter Shaft

10 RainPerfect™ Water Pump Harsh environment DC motor technology pressurized pumping at 0.9 bar solar rechargeable, NiMH battery system, pumping up to 378 liters of water on a single charge Standardized garden fixtures, ensuring compatibility with all major hose brands Retail: $450.00

11 First Flush: floating ball system First 10% of rainfall –Rain and debris accumulate in chamber –The ball floats to the top and gets stuck in the narrow space blocking the bottom chamber –redirects subsequent collected rainwater into the main clean water storage tank

12 Water Storage Tanks Steel Above ground –$10K-15K per 10K gallon tank Polyethylene Water Tanks Above ground vertical tanks –$ /gallon for traditional cisterns –$5K-8K per 10K gallon plastic tank

13 Educational Water Cistern Site University of Arizona tpomag.com 10k gallons

14 Keeping a healthy rainwater tank Cover, lids, and screens Inlet screens Algal growth –Light & Oxygen Discard first rains (first flush) New tank protection Periodic inspection

15 Landscaping 1 plant per 10 square feet landscaped area: 6.5 acres (minus all areas covered with buildings, walkways, parking lots, animal cages, stabilized DG paths) remaining Area for landscaping is 2.6 acres. Monthly Landscape Demand: 100K-275K gallons

16 Bio Swales

17 Bio Swale Basins/ Fundraising

18 GREY WATER HARVESTING

19 Grey Water Calculations Maximum Demand Demand/person= 50 G/Day Demand/50 people=3600 G/Day Demand/50 people for a month=108,000 G Additional Demand US clothes washing machine : gallons per cycle Dishwasher gallons per cycle Low-flow shower head (per shower) gallons per average use Other sink use (shaving, hand washing, etc.) gallons per average use

20 Grey Water Filtration Techniques Wood chips Sand filter Chlorination Active carbon filters No coloring for irrigation

21 Rough Cost Estimates Water Tank: 5-10,000 gallon tanks –$50,000 Rain water filtration (2 roof + 2 parking lot) –$2856 –$900 (solar pumps) Grey water system –$5,000 Other costs –Maintenance, drive cost of systems, water quality checking, leakage

22 Happy Trails!! See you at the grand opening