A sustainable waste management solution

We turn waste into value. How is our process unique

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Our Technology

Plasco employs a patented process that efficiently recycles heat from the process to gasify the waste and then uses the unique characteristics of plasma to refine the gaseous product into a clean, consistent syngas.


Patented Technology

The technology within the Plasco Gasification and Plasma Refining System (GPRS) is protected by issued and pending patent families covering the overall system and components.

Plasco GPRS

Plasco GPRS

The Integrated Conversion and Refining System (ICARS) is the heart of the Plasco conversion process. A complete EfW plant was built and operated to test ICARS and GQCS in commercial operating conditions at large scale. The following is a brief description of ICARS.



ICARS Description

1. The twin feeders add waste to system, while preventing air ingress.
2. The Converter dries waste, removes volatiles at low temperatures, using recycled process heat.
3. The under grate ash is collected and returned to system to extract energy.

Plasco Proprietary Grate System

Plasco Proprietary Grate System

Feeder Airlocks deliver shredded waste into the Conversion Chamber while maintaining a seal which prevents air from entering.

Feeder Airlocks

Waste from the Feeder Airlock is delivered to the first of the grates in the Conversion Chamber. Preheated air is delivered to each grate in the conversion chamber with flow controlled by the digital control system based on continuously reported syngas analysis. Volatile elements in the waste, including hydrogen and carbon are released. Carbon is oxidized to produce CO and limited amounts of CO2. Temperature on the grate is sufficient for drying and pyrolysis. Waste is then pushed into the Carbon Recovery Vessel where fixed carbon is recovered.

4. Carbon Recovery Vessel (CRV) converts fixed carbon to energetic syngas while heating inorganics to melting point. Inert materials exit the bottom of the CRV towards the Solid Residue Melter (SRM).
5. The SRM superheats melted ash and provides enriched preheated air to bottom of CRV. When cooled quickly, it is vitrified and nonleachable, suitable for value-added products.
6. The CRV plenum collects syngas from the converter and CRV and sends it through cyclones, where about 87% of particulate is removed.
7. Particulate from cyclones, the bottom grate, and the Gas Quality Control Suite (GQCS) is reintroduced into the CRV. There is no fly ash.

Process Highlights of Plasco ICARS

The CRV is separated from the SRM by a grate. Heat from the SRM flows with flue gases through the grate into the bottom of the CRV. Temperature in the CRV rises above the grate allowing melted slag to drip into the SRM. Oxygen from the SRM combines with carbon in the CRV to form CO and some CO2 and flows up through the material to join gases released in the Conversion Chamber.


In the SRM, preheated air enriched with oxygen is used to drive a gas burner to deliver heat to the SRM. Additional heat is provided by two Oxy-gas burners which maintain slag liquidity in the SRM.


Solid Residue Melter

Melted solid residue exits the SRM at ≥ 1500C, and is vitrified as it cools. The material is non-leachable and saleable for a range of industrial uses including extending Portland Cement by 20% or as an abrasive blast medium.

Natural gas or propane provides < 5% of the total energy entering ICARS; > 95% of energy is from waste.


8.The refining mixer provides turbulent mixing of syngas and preheated air or oxygen, and then exposes syngas to plasma plumes. Plasma is used for refining and catalysis to crack tars, not as a primary heat source.
9. Syngas leaving the mixer is held for 5 seconds in the refining chamber to complete cracking reactions, then moves on to the Recuperator.
10. The Recuperator heats process air, while cooling the syngas. Some process air is used in gasification, but most is used to produce steam in a combined cycle, or to dry waste.
11. Formation of dioxins and furans is prevented by ensuring there is no oxygen in the syngas and it is rapidly cooled in the Recuperator and subsequent water quench before passing on to the GQCS.
There is no need to depend on a gas cleaning system to prevent dioxins and furans – the process does not make any!

Process Highlights of Plasco ICARS

Process Highlights of Plasco ICARS