Wastewater Reuse Expansion in Austin Ryan Grosskopf Austin

Wastewater Reuse Expansion in Austin Ryan Grosskopf

Austin Wastewater Reuse 2009 • 5. 2 MGD • Avg potable water production of 142 MGD • Summer residential landscape use: ~25% 2034 • 15 MGD • Avg water production ? ? ? Primary Uses • Cooling water • Golf courses • Landscape irrigation

Centralized Austin Reuse

Problem?

Possible Solution: MBRs and Decentralized Reuse Small Footprint Low maintenance Sewer mining $7 -20 / gallon capacity http: //www. eflo. com/pdfs/eflo-mbr. pdf 250 m 3/day or about 66, 000 gpd

Where? Determine Treatment Plant and Use Locations City of Austin • 2008 Land Use Dataset • 2010 Wastewater and Reuse Network Data USGS • 1/3’ DEM

Current Infrastructure Limitations: 51 st Street Tower http: //www. austinchronicle. com/

Which Neighborhood for Service? Accuwater Evapotranspiration Index • 2009 annual average: . 042 inches/day Package MBR plant capacity • . 025 -. 300 MGD Elevation • ~70 feet of head required for irrigation sprinklers Evaluation by hand…. TEDIOUS! Land Use Single Family Duplexes Apartment/Condo Commercial Office Government Services Educational Meeting and Assembly Cemetaries Parks/Greenbelts Undeveloped Irrigated Area 40% 30% 0% 0% 20% 0% 75% 20% 0%

Selected Neighborhood Land Use by Area: ~95% of property area likely has some irrigation Single Family Duplexes Educational Cemetaries Parks/Greenbelts Non-Irrigated Total Area: 640 Acres or 2. 6 km 2 Total Estimated Irrigation Volume: . 31 MGD or 1173 m 3/d

Plant Location Distance from > 24” wastewater main Elevation gain from neighborhood Property type and size

Jackpot!