Perma-Fix Environmantal Services

Radioactive and Mixed Waste Services

Thermal Treatment via Combustion

boiler industrial furnace Perma-Fix offers thermal treatment of both Toxic Substances Control Act (TSCA) and non- TSCA regulated radioactive and Mixed Low Level Waste (MLLW) liquids and sludges.. The DSSI facility performs combustion processing of wastes The DSSI facility is authorized by EPA Region 4 to manage TSCA regulated PCB contaminated radioactive wastes. This authorization is the first and only commercial outlet for radioactive PCB waste treatment and disposal that had not previously been available to commercial generators. The residual ash generated from combustion processing is stabilized to meet Land Disposal Restricted (LDR) standards, and disposed of as DSSI waste at the Clive site in Utah and a Certificate of Management (COM) is issued to the generator.

To expand the types of wastes acceptable for processing through the combustion system, a liquefaction unit is employed. Solid or semi-solid materials can be converted to a liquid state using high shear mechanical mixers, homogenizers, and mills. The materials are reduced in size and create a colloidal suspension with the free liquid resulting in a pumpable liquid waste that can be combusted in accordance with EPA requirements.

Acceptable Wastes for Combustion

Perma-Fix’s DSSI facility is permitted to receive mixed wastes with waste code designations of D, F, K, P, and U; TSCA regulated liquid PCB’s; low-level radioactive wastes; and used oil.

Acceptable wastes include:DSSI Tank Farm

  • Radioactive PCB’s
  • Radioactive oils and sludges
  • Solvents (halogenated and non-halogenated)
  • Organic-bearing aqueous wastes
  • Ignitable, corrosive liquids
  • Used oil

Combustion Process

Combustion in DSSI’s direct-fired boiler industrial furnace (BIF) meets the provisions of 40 CFR 266 and is applicable for destruction of many liquid mixed and radioactive waste streams. Wastes are sampled and analyzed prior to processing, and then blended to control concentrations of contaminants and optimize processing parameters.

The boiler system is designed and operated to combust waste liquids and propane gas as fuel sources. It provides direct energy conversion and recovery by placing waste fuel combustion flue gases in contact with the “fire tubes” of a steam generator. The water outside these tubes is converted to steam that is subsequently converted to electrical power through a turbine-induction motor generator system.

In addition, the Perma-Fix/DSSI facility can accommodate drum quantities or large bulk (tanker) quantities of liquid wastes. The facility tank farm has the capacity to store 30,000 gallons of liquid wastes. The tanks are used for storage and to allow for blending of the wastes prior to processing.