Compared with waste incineration by specialised incinerators, waste co-processing (pre-treatment and co-incineration) in cement plants takes advantage of the technology already used for the cement production process:
- very high flame temperature (2000 °C)
- 5-to-6 seconds exposure to temperatures > 1100 °C inside kilns
- O 2 excess necessary for the clinker production process, assuring a total combustion
- gaseous acids neutralized by the limestone found in raw materials
Considering that co-processing also results in a complete thermal recovery of waste, as well as in no generation of secondary products (slag, ashes) that would later require landfilling, we can safely say that this method is an ideal solution to the waste problem that involves no risks to the environment or to the quality of our finished product (cement).
Waste co-processing in cement plants can be a win-win partnership for all parties involved.
To waste generators it offers:
- the guarantee that waste is disposed of completely for a relatively inexpensive cost and without any environmental risks
- the closure of the product life cycle
- prevention of environmental problems and related penalties
To cement producers, it offers:
- partial substitution of fossil fuels and raw materials
- an opportunity to become actively involved in environmental care and to build the image of a Depolluter and Environmental Service Provider
Nevertheless, it is the society and the environment that benefit the most from co-processing, as this method ensures:
- conservation of natural resources: coal, crude oil, gas, gypsum, limestone, clay,�etc.
- indirect reduction of greenhouse gas emissions that would be generated if waste was landfilled or incinerated in special waste incinerators.
- diminution of environmental hazards (uncontrolled landfilling, soil and water pollution etc)
- avoidance of controlled landfilling shortage
- a healthier and cleaner environment