DMG® technology offers many benefits to owners, operators and local communities; improving air quality and solving the unrecyclable plastic waste problem.
The primary cost benefits for installing DMG® technology are:
- Low Cost Waste Destruction and Regeneration
- Low Cost Electricity
- Low Cost Hydrogen
- Low Cost Heat
The advantages of the DMG® technology include:
- An alternative to putting unrecyclable plastic into landfill
- Potential reduced waste sorting and cleaning costs vs other Energy from Waste processes
- Can process any mix of polymers
- Feedstock can be wet, with organics
- The CV range is less significant to DMG® operation and efficiency than to other Energy from Waste processes
- The DMG® syngas can be used for industrial applications and as chemical precursors
DMG® – How It Works
For many reasons the majority of plastics do not get recycled: they can be too expensive to collect, clean, sort and separate, they have little recyclable value, or there simply aren’t enough recycling plants. These unrecyclable and unrecycled plastics are wasted through being buried in the ground in landfill or are fed into an incineration plant, from which only minimal inherent energy is recovered. Or they are exported to less developed countries under the guise of recycling.
DMG® is a new type of Chemical Recycling, a form of Advanced Thermal Conversion Technology that takes these unrecyclable plastics and recovers the maximum amount of calorific value (energy) through an innovative approach to waste management.
Firstly, the plastics are broken up and shredded into similar size pieces to allow feeding into the DMG® Thermal Conversion Chamber … where the transformation from unrecyclable plastics into clean energy begins.
The process involves the plastic being heated to a very high temperature, within a few seconds it melts and then vaporises into a mixture of gases. Further heating within the Chamber reforms the molecules into a synthetic gas known as “syngas”, comprising a mixture of methane, hydrogen and a smaller volume of carbon monoxide. The Thermal Conversion Chamber operates in the absence of oxygen, so there is no burning. However a non-combusting oxidising agent in the form of steam is added to control the process and the quality of the syngas. Once through the Conversion Chamber the syngas is cleaned, leaving behind a few inert residues, which are typically less than 5% of the starting volume of waste plastics. These residues can then be reused for other purposes or disposed of safely.
The resulting gas is similar in calorific value to the Natural Gas used as the fuel for cooking and heating homes and businesses across the country.
A small portion of the syngas produced is used to provide the heat required to run the Thermal Conversion Chamber, making the whole process self-sustaining once running; a small amount of natural gas being required to start it.
Another by-product is heat, which can be captured and made available for sale to neighbouring industries, for heating or cooling any processes.
The energy rich syngas is then further processed to generate electricity and sustainable hydrogen. Electricity is generated by passing the syngas through a series of gas engines that generate electrical power for local distribution via a private electricity grid or to the national grid for homes and businesses. The gas engines are traditionally design with modern exhaust clean up equipment to minimise emissions to the environment.