Cover of Closing the Salt Balance

Applications & Markets · Scientific white paper

Closing the Salt Balance

A scientific white paper setting out a framework for net-zero-freshwater crop production in the United Arab Emirates using EPIC passive subsurface conveyance and saline water.

Author
Rabie Shawwa, Xpitrade General Trading LLC
Edition
1 · September 2026
Format
PDF · 106 pages · 9.1 MB
Access
On request
Request a copy Sent by the team on request

About this document

Closing the Salt Balance examines what happens to salt when crops in the Emirates are irrigated through EPIC with desalination reject, saline groundwater, treated sewage effluent or, on the coast, seawater, and closes the salt mass balance around the resulting cell.

The paper acknowledges Jonas Z. Sipaila, originator of the EPIC system, and reproduces and re-reads the January 2009 column study he ran. It keeps measured, published and derived values visibly distinct, gives the equations behind every derived table so a reader can reproduce them, and names the quantities that remain unknown, assigning each one to an experiment.

Ten stated findings lead into eight parts. These cover the water problem in the Emirates, the mechanism by which the profile handles salt (including the Yas Island records of 2011 and 2012), the mass-balance design method, the complementary technologies ranked by leverage, and five crop pathways: halophyte oilseed, halophyte lignocellulose, halophytic forage grasses, salt-tolerant grain and coastal planting.

The later parts set out a staged demonstration programme of seven case studies, each with its instrument list, pass or fail criterion and the decision it unlocks, followed by the risks, the limits and the results that would falsify the thesis. Five appendices reproduce the 2009 laboratory dataset and the Yas Island records, and give the design equations, salt tolerance reference data and unit conventions.

10Findings, each linked to the section that sets out the working
5Crop pathways examined: fuel, energy, feed, food and carbon
7Demonstration case studies, DP-0 to DP-6
5Appendices, A to E

What is inside

  1. Front
    Acknowledgement, abstract and findingsThe debt to the EPIC originator, the paper in summary, and ten findings with their section references.
  2. Part 1
    The problem worth solvingWater in the Emirates, why saline irrigation fails, the forage question, brine as a resource, and what net zero water can mean.
  3. Part 2
    The mechanismThe profile and chamber, the inverted gradient, the January 2009 column study, the Yas Island records and sodicity in sand.
  4. Part 3
    Closing the balanceThe mass-balance identity, leaching requirement, cycles of concentration, the gypsum ceiling, the design rule and a worked module.
  5. Part 4
    The complementary technologiesReservoir chemistry, electrodialysis on the bleed, solar evaporation, atmospheric water, enclosures, biology, instrumentation and energy.
  6. Part 5
    Five crop pathwaysHalophyte oilseed, halophyte lignocellulose, halophytic grasses, salt-tolerant grain and coastal planting, compared and ranked.
  7. Part 6
    The demonstration programmeSeven case studies from the Salt Balance Cell to the Coastal Ecosystem Cell, with schedule, gates and partners.
  8. Part 7
    Risk, limits and falsificationFailure modes, what would falsify the thesis, environmental and regulatory questions, and what is and is not claimed.
  9. Part 8
    ConclusionThe answer to the question the paper set out to address, with its qualifications.
  10. A to E
    References and appendicesThe 2009 dataset, Yas Island records, design equations, salt tolerance data, and units and precision.

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Published by EPIC Total Water Solutions LLC, Reno, Nevada. Issued in the Middle East and North Africa by Xpitrade General Trading LLC.

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