Here are the only elements that emerge at the end of the process. In addition to large quantities of synthetic gas, heat and pure water, recycling 100% of the vitrified product used in concrete or as granules, salt, zinc, sulfur and an alloy of iron and copper, reused by industry.
100% of waste is recycled to 100% without any pollution or discharge.
High Temperature Gasification
is Recycling the Ultimate Residual Waste
The Flagship concept
Only the non-recycled and non reused wastes are delivered at the Thermoselect plant, meaning the “ultimate residual waste”. This plant, therefore, becomes a unique and strategic equipment that complements the recycling and the reuse of waste from a region and which achieves the 100% recycling, reuse and/or revalue of ultimate residual waste too. Buried wastes could also be an input to the waste stream of the plant.
The Thermoselect Process
After the garbage pick-up trucks have dumped the waste in the waste reception area inside the building, the waste is brought to the gasification unit by a crane operator. The waste is then compacted to take out any residual air in the waste stream. The waste then goes through a pyrolysis chemical process occurring into the horizontal degasifying tunnel, at 600 ℃ and airless condition. This first part of the process treats the organic portion of the waste only, and they are transformed into a blend of gases, called syngas. It also rejects into the reactor a coal like residual waste mixed with metals, glass and ceramics; those materials then fall to the bottom of the reactor into a funnel that is heated by either syngas recovered from the process or by natural gas which are introduced together with oxygen to permit it to burn.
Schematic of a center Thermoselect treatment by
high-temperature gasification of residual waste
The maximum heat is generated at the bottom of the reactor by addition of natural gas accompanied with injection of pure oxygen to allow temperature to increase to 2000 ℃. and to also immediately combust the coal like residues. All material especially harmful dioxins and furans becomes simple atoms of gas (oxygen, carbon and hydrogen ) and located on top of the reactor to the exception of metal and mineral which form a liquid mixture. A unique and extremely fast “shock treatment” allows the gas composition to avoid the reformulation of dioxins and furans and also the safe use of syngas, the energy produced.
Other cleaning parts of gas treatment extract chlorine and sulphur which become useful by-products. The liquid mixture goes through the homogenous horizontal channel and is cooled after the separation of metal balls and inert glass, a mineral slag called vitrified granulates, is then formed. Those two also are also used in industrial recycling applications. They could also be use to produce rockwool insulation material for construction.
Metals are sent to a metal foundry and are either used as they are or are or melted to then separate the various metals in them. The vitrified granulates can be utilised in road construction as they contribute stability for such uses or in various other cement applications in replacement of granulate rock.
Hot water, the last by-product, can be used for heating purpose (around the plant localisation in greenhouse application for example) and is reused in a circle loop inside the plant