Future Water Demand and the Role of Alternative Sources and Water Reuse in Texas Industrial Water Reuse and Desalination Texas Industrial Water Management Forum November 6, 2014 Erika Mancha
The following presentation is based upon professional research and analysis within the scope of the Texas Water Development Board s statutory responsibilities and priorities but, unless specifically noted, does not necessarily reflect official Board positions or decisions. 2
Mission To provide Water Science & Conservation Leadership, Information, Education, and Support for planning, financial assistance, and outreach Finance Texas Water Development Board Water Supply & Infrastructure for the conservation and responsible development of water for Texas. Operations & Administration 3
Regional Water Planning Areas 4
Volume (Millions of acre-feet) 25.0 20.0 15.0 10.0 5.0 18.0 Projected Water Demands Water Demands 19.0 Projected Water Demands and Existing Supplies 19.8 Existing Water Supplies 20.5 21.2 22.0 17.0 16.4 16.0 15.6 15.4 15.3 0.0 2010 2020 2030 2040 2050 2060 Year 2012 State Water Plan
Projected Population Growth Number of People Year 2012 State Water Plan
Drought Conditions 7
2012 State Water Plan Recommended Water Management Strategies by 2060
Region H Recommended Water Management Strategies by 2060 2012 State Water Plan 9
Reverse osmosis membranes Direction of Research at National Level Permeability improvements (e.g., ion selectivity and biofouling) Seawater desalination challenges Reduce environmental impacts from intake structures Direct potable reuse Increase in number of projects and public acceptance Membrane materials Research on graphene, aquaporins, and carbon nanotubes Plant operation optimization New instrumentation and control technologies for processes 2014-2015 International Desalination Association Yearbook 10
Mission To provide Aquifer Storage Recovery (ASR) research, develop, and disseminate information to advance the development of innovative water management strategies in Texas Rainwater Harvesting Innovative Water Technologies Water Reuse Brackish Resources Aquifer Characterization System (BRACS) Desalination http://www.twdb.state.tx.us/iwt/
Characterize brackish aquifers Geophysical well logs 46,956 data records Brackish Resources Aquifer Characterization System (BRACS) Water and oil/gas wells Aquifer analysis Maps Volume estimates Estimated 2.7 billion acre-feet of brackish groundwater
BRACS Study Areas 13
BRACS Reports Data Dictionary Describes primary tables in database Pecos Valley Aquifer Foundation for methods, sources, and datasets http://www.twdb.texas.gov/innovativewater/bracs/docs.asp 14
Desalination Plants 15
Desalination Plant Capacity in Texas Number of Facilities Plant Capacity 140 Plant Capacity Million Gallons per Day (MGD) and Number of Facilities 120 100 80 60 40 20 22 MGD 12 30 MGD 14 75 MGD 38 120 MGD 123 MGD 44 46 0 1999 2001 2005 2010 2012 Year 16
Desalination Reports Guidance Manual for Permitting Class I and Class II Wells for the Injection and Disposal of Desalination Concentrate Developing Practical Alternatives to Pilot Plant Studies for Innovative Water Technologies 17
Seawater Desalination One operational seawater desalination facility in Florida Tampa Bay Seawater Desalination Plant (25 million gallons per day) Second plant is currently being built in California Carlsbad Desalination Project (50 million gallons per day) 2014 Biennial Report on Seawater Desalination Due to legislature on December 1, 2014 18
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Water Usage in Texas 1.7 % Reused ~316,000 acre-feet 5.5 % is Reused ~268,000 acre-feet 18,000,000 acre-feet Total Water Use 4,866,000 acre-feet Municipal Water Use 2011 Water Use Survey 20
Contaminants of Concern Water quality performance targets Water quality characterization Source control Treatment technologies Environmental buffers Quantitative relative risk assessment Pilot protocols Regulatory summary Public awareness and outreach Water Reuse Research Evaluating the Potential for Direct Potable Reuse 21
Testing Water Quality in a Municipal Wastewater Effluent Treated to Drinking Water Standards Quarterly sampling Chemicals of Emerging Concern microbial pathogens Develop correlations for surrogates compounds Guidance document for monitoring at direct potable reuse facilites 22
Role of Industry Reduce municipal water demand Conserve water Reuse water 23
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