Table 6.2 Shipboard Compatibility Attributes for Additional Long-Range Technologies

ATTRIBUTE

ADVANCED OXIDATION UV PEROXIDE /OZONE

ELECTRON BEAM

WET AIR

SEMICONDUCTOR ELECTROCATALYSIS

Status of technology

  • Mature, well developed

  • Commercially available

  • Waste treatment demonstrated

  • Mature, well developed

  • Commercially available

  • Waste treatment demonstrated

  • Commercially available

  • Prototype electrolysis cells being developed

  • Will be commercially available within 2 years

Process versatility

  • Requires dilute aqueous streams

  • Must remove suspended solids

  • Any aqueous stream (gray water, black water, oily water)

  • Shipboard liquid waste stream

  • Pulped paper

  • Suitable mainly for waterborne dissolved waste and hazardous waste

Process density

 
  • >5 lb/h/ft2

 
  • Not available

Ship system demands

  • Radiation shielding

  • Oxidant storage or ozone generation

  • Radiation shielding

  • Electromagnetic emissions

  • Ventilation

  • High voltage

  • Ventilation

  • Electrical power

  • Dissolved oxygen

  • Ventilation

Installation flexibility

  • All ships and boats

  • Large surface ships

  • Surface ships

  • Surface ships

  • Submarines

Energy requirements

  • 2 to 5 kW/gal/min flow

  • 1/2 kW/gal/min flow

  • Pumps

  • Startup power

  • Self sustaining from biosludge

 

Ship motion effects

  • None

  • None

  • Not significant

  • Minimal

Process sensitivity

  • Need pretreatment to remove suspended solids or color

  • None

  • Process susceptible to power loss

 

End products

  • Probable production of partially oxidized organics

  • Oxidized organic byproducts at low dose

  • CO2

  • H2O

  • Oxidized organic compounds

 

Process safety

  • Radiation protection (UV light)

  • Radiation protection (x radiation)

  • Not significant

 

Projected reliability

  • Reliable

  • Reliable

  • Simple equipment

 

Projected maintainability

  • Can be maintained by trained crew

  • Can be maintained by trained crew

  • Unknown

 

Projected controllability

  • Easily controlled

  • Easily controlled

  • Automated controls operating

 

Costs

  • Approx. $9 to $12 per 1,000 gallons

  • Approx. $4 to $6 per 1,000 gallons

   


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