1. WASTE MANAGEMENT USING
SUPER CRITICAL WATER
OXIDATION

2. Introduction

3. Super Critical Water(SCW)?
 When water’s
temperature and
pressure are above
3740C and 221 bar
respectively, it
enters a supercritical
condition.

4. Its an additional
phase to its more
familiar solid,
liquid and gaseous
phases. Under
these conditions
the physical
properties of
water change.
Water phase
Transition state
Super Critical State

5. Properties Of Super Critical Water
Density is less than
that of the liquid;
Viscosity is the same
as the gas;
Diffusivity is between
the liquid and the gas.

6. Supercritical Water Oxidation (SCWO)?
SCWO takes advantage of the unique
properties of SCW to destroy organic waste.
The organic content of the waste feed is
quickly and efficiently converted to carbon
dioxide, water , etc.

7. Process Flow Of A SCOW System:

8. AquaCritox:
 Unique method in
sustainable wastewater
treatment and sludge
destruction.
Uses SCWO, which
destroys organic waste
safely, without
generating hazardous
emissions.

9. Process:
SCW as the reaction medium, and an oxidant
such as air, O2, or NO3.
High temperature and pressure.
Organic wastes and metals are oxidized to
inert species.
Oxidized to CO2 and H2O along with a release
of energy.

10. Process:

11. Some Facts Of Process:
Rapid & complete reaction.
Total conversion of organics to CO2, H2O, N2
Halogens converted to the corresponding
mineral acids
No harmful by-products

12. Some Facts Of Process:
No exhaust gas cleaning requirements
Continuous operation
Recycling of valuable in organics possible
Totally enclosed process

13. Application of SCWO
 The alterative for safe disposal is limited.
 Deep well injection, open burning are
restricted in many areas.
 Many process are costly.
 SCWO represents an economic alternative.

14. Application Of SCWO
Surface
Treatment
Separation
Of Process
Super
Critical
Water
Recycling
Waste
Treatment

15. Applications Of SCWO:
 Hazardous & toxic
harmless products.

16. Advantages of SCWO
 Combustion efficiency is greater than 99.99
percent.
 Excellent process stability and control.

17. Advantages of SCWO

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
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Very high destruction efficiencies
Totally contained process
No smokestack
Relatively low temperature operation
Compact size
Competitive cost
Combustion efficiency is greater than 99.99
percent.
 Excellent process stability and control.

18. Demonstration and development
 General atomics is the world leader in SCWO
development.
 They have 15 years of experience.
 US air force has been sponsoring SCWO
development over 10 years.

19.  Pilot plant built by
General atomic to
demonstrate
conversion of organic
waste streams into
various forms of fuels
and power.
Supercritical water
pilot plant

20.  General atomic now offers SCWO for a wide
range of applications.
 Systems are automated, fast and easily
installed.

21.  SCWO built at
McAlester Army
Ammunition Plant.
 use in cleanup of waste
streams associated
with demilitarization of
weapons.
 To transition from
hazardous waste
disposal to hazardous
waste conversion.

22. Current SCWO applications
 Evaluation in the Japanese hazardous waste
destruction market.
 The Bluegrass chemical demilitarization plant
will use SCWO to destroy hydrolysate.
 Tooele Army Depot for destruction of
energetics hydrolysate.
 A SCWO system is planned for waste
treatment in a facility in Alaska

23. Conclusion
 Powerful technology for transformation of
toxic organic waste in inert compounds.
 Specially recommended for disposal of
hazardous wastes.

24. Thank You