The 91 st Avenue Unified WWTP Targets 100 Percent Reuse

Transcription

1 SROG GLEND LE The 91 st Avenue Unified WWTP Targets 100 Percent Reuse 26 th Annual WateReuse Symposium September 14, 2011

2 Presentation Outline Facility Location and Ownership Basic Facility Information Current Reuse Customers Potential Future Reuses Unified Plant Concept to Support Reuse Market Resource Center Questions

3 91 st Avenue WWTP Location SCOTTSDALE GLENDALE PHOENIX TEMPE MESA 91 ST AVENUE WWTP GLEND LE

4 91 st Avenue WWTP Ownership Sub-Regional Operating Group (SROG) City Capacity Ownership Phoenix 55.16% Glendale 6.45% Scottsdale 9.90% Tempe 14.20% Mesa 14.29%

5 230 mgd current capacity 91 st Avenue WWTP Expandable to 385 mgd 140 mgd current flows Nitrification / denitrification Arizona Class B+ effluent 25-year master plan for all future expansions (Unified Plant concept)

6 Current Water Reuse Locations

7 Palo Verde Nuclear Generating Station Only nuclear plant in world using effluent (since 1985) Cooling tower use Accepts unfiltered secondary effluent, accepted 67,700 AFY (6/11) Additional treatment: trickling filters, 2-stage clarification, lime softening, filtration 80,000 AFY allotment per new agreement Now nation s largest energy producer

8 Buckeye Irrigation Company Receiving effluent since 1971 for agricultural irrigation Diverts effluent from river downstream of WWTP and Tres Rios Diverted 28,200 AFY (6/11) and 20,000 AFY (7/11) Can take up to 20,000 AFY through 2015, with options to extend to 2030

9 Tres Rios Constructed Wetlands Cost-effective treatment for continued discharge to Salt River Increases fish and wildlife habitat Reduces potential for flood damage Provides public recreation opportunities Accepted 1,400 AFY (6/11), 45,000 AFY (7/11) When fully operational (1/12), can take up 56,000 AFY

10 Current Reuse Reuse Customer Palo Verde Nuclear Generating Station Buckeye Irrigation Company Tres Rios Constructed Wetlands Amount (AFY) June 2011 Total Current Reuse 97,300 (60% of production) Amount (AFY) July ,700? 28,200 20,000 1,400 45,000? (70% of production) Current Plant Production 158,000?

11 Proposed Agua Fria Linear Recharge Project 101 Agua Fria Linear Recharge (40,000 60,000 AFY) GLENDALE SCOTTSDALE Pipeline to Agua Fria Gila River Tres Rios Wetlands st Avenue WWTP Gila River PHOENIX 10 TEMPE 202 MESA

12 Other Potential Environmental Habitat Projects Phoenix Rio Salado Oseste (8,000 AFY) Phoenix Rio Salado (4,000 AFY) Restore habitat, recreation, and educational value Effluent could come from 91 st Avenue WWTP or other Phoenix plants

13 BIC TRES RIOS PROJECT Unified Plant Concept to Support Reuse MARKET RESOURCE CENTER ANPP UNIFIED PLANT EXISTING PLANT SALT RIVER UP05 TRES RIOS

14 Unified Plant Concept Treatment process units operate as part of integrated system Processes are disassociated by common channels, flow can go to any unit in next area Single process units can be removed without affecting effluent quality Process units sized such that follow-on units with decreased influent quality can still meet quality requirements Benefit: reliable reclaimed water production is maintained even during process upsets or maintenance events

15 Market Resource Center Master Plan anticipated need for future advanced treatment (regulatory or customer requirements) Reserved space on the 91 st Avenue WWTP master-planned site Space for membrane filtration and reverse osmosis, including brine treatment and disposal Estimated that up to 60 mgd from the plant could be allocated to end uses requiring advanced treatment by 2025

16 Potential for 100% Reuse Reuse Customer Palo Verde Nuclear Generating Station Reuse Amount (AFY) 80,000 Buckeye Irrigation Company 20,000 Tres Rios Constructed Wetlands 56,000 Potential Agua Fria Linear Recharge 40,000 60,000 Other Potential Recharge/Habitat Projects 12,000??? Potential AWT Customers 67,000 Total Potential Reuse 275, ,000+ Current Plant Production 158,000 Current Plant Capacity 257,600

17 SROG Questions? GLEND LE For Information: Steve Rohrer