With the goal of sustainable development, the circular economy model has become an alternative to the previous linear economic model - which only focused on exploitation, production, consumption and disposal. With the circular economy model, part of the waste is returned to the production cycle by reusing, recovery, recycling or energy recovery. Including:
Pre-processing is the process of pre-treating wastes in order to produce a relatively unified waste stream according to specific technical standards before participating in the next step in the manufacturing and treatment process.
Co-processing is the incorporation of an existing manufacturing process for recycling, treatment, and energy recovery from waste, waste as a raw material, alternative fuel or being treated. (according to Decree No. 38/2015/ND-CP)