Organic Matter Decomposition System Using Hot Titanium Oxide as Catalyst|RAPAS CORPORATION

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Examples of Applied Technology SDGs

Waste plastic treatment

Current state of waste plastic treatment

Waste plastic spilling out of a pit at an intermediate treatment trader

In December 2017, China banned waste plastic imports
          ↓
       “China shock”

If this situation continues, waste plastic will be everywhere without treatment,
and waste disposal will no longer be taken for granted.


Application in waste plastic treatment

Waste plastic treatment using a heated titanium oxide catalyst

Waste plastic treatment at the location of generation is necessary along with the establishment of a recycling system and efforts to reduce waste.
(ON-SITE treatment)

Waste plastic treatment with a heated titanium oxide catalyst

Measures against waste plastic treatment problem caused by the China shock


Waste in the oceans

Current state of waste in the oceans

Current state of waste in the oceans : Drifted wastes/Ghost fishing/Effects of hazardous substances [Source: Website of Ministry of the Environment]

Treatment of waste in the oceans

Different types of waste in the oceans (drifted wastes) : Fishing gear (floats)/Fishing gear (fishing nets)/Medical waste/Plastic bottles/Daily commodities [Source: Website of the Ministry of the Environment]

Advantages of titanium oxide catalyst technologies


Recovery of carbon fibers

The titanium oxide catalyst can decompose only a resin component of carbon fiber-reinforced plastic (CFRP) to recover expensive carbon fibers without damaging the carbon fibers.

Treatment of CFRP (semi-preg) in form of woven fabric

Treatment of CFRP (semi-preg) in form of woven fabric

Before treatment Black carbon fibers and a white resin are woven together. The resin is also contained at spaces between the carbon fibers.

After treatment The resin component is completely decomposed.
Only the carbon fibers can be recovered in the form of woven fabric.


Treatment of CFRP (pre-preg) in form of sheet

Treatment of CFRP (pre-preg) in form of sheet

Before treatmentA product obtained by forming unidirectional long carbon fibers into a sheet by using a resin

After treatmentThe resin component is completely decomposed and the carbon fibers can be recovered in the form of long fibers.


Electron micrograph

Electron micrograph

All the resin components on the surfaces of the carbon fibers and in the spaces between the carbon fibers can be completely decomposed. There are no damages such as a scratch on the surfaces of the carbon fibers recovered after the decomposition treatment.

Recovery of precious metal through treatment of cellular phone and smartphone

Recovery of precious metal through treatment of cellular phone and smartphone

All the organic materials such as plastic in a cellular phone or a smartphone are decomposed.
Metals, glass, and the like, which are not decomposed, can be recovered.


Separation with sieve

Separation with sieve

Metals, precious metals, and the like are recovered by subjecting a cellular phone or a smartphone to decomposition treatment, followed by separating inorganic materials from the titanium oxide catalyst with a sieve.

Concentration of recovered precious metal

The inorganic residue recovered through the treatment of a cellular phone or a smartphone contains precious metals such as gold and silver at high concentrations.

*The result is obtained by analyzing an inorganic residue recovered after treatment of 10 units of cellular phones.

Recovery of valuable metals

Treatment of shredder residue

Recovery of valuable metals

A shredder residue discharged from a recycling plant is treated.

Various kinds of organic materials contained in the shredder residue are decomposed, and valuable metals such as iron, aluminum, and copper, and the like are recovered.

Coating removal treatment of aluminum product

Removal of coating on metal surface

Coating removal treatment of aluminum product

An aluminum product, steel product, or the like having a surface coated with a coating material or a resin is treated.

The coating material or resin coating material on the surface is decomposed, and the aluminum product, steel product, or the like is recovered in a state of containing only valuable metals.

Other application businesses

The treatment can be applied to products or information that one do not want to leak out, or products that are difficult to treat by existing technologies.

Treatment of medical waste


[Treatment equipment for medical waste]

Infectious medical waste is treated in a safe manner in hospital facilities without burning it.


The treatment of waste is completed in hospital facilities.

The treatment of waste is completed in hospital facilities.


Bacteria etc. causing the infection are also decomposed.

Infectiveness inactivation test

Effectiveness on reducing infectiveness of bacteria or the like is confirmed···Reduction of 99.99% (10-4)
Reduction of 99.9999% (10-6) is recommended in consideration of safety.