Evaluation of Plastic Waste Management in Thailand Using Material ...

Refuse Derived Fuel in Thailand
There are many RDF plants in Thailand such as Pitsanulok municipality, TPI Polene
Company, GEOCYCLE Company, etc. RDF can be produced from fresh MSW and
landfilled wastes. The processing includes pretreatment, separation, and size reduction.
First of all, wastes are unloaded at the unloading area, and then wastes are dried for 6-8
hours. The first size separation is operated by trammel (see Figure 2.16) to prepare 300
mm. wastes. Next, there is the separation between heavy waste and light waste by the
separation machine (see Figure 2.17). This step can separate the non-combustible wastes
(e.g., metal, glass, soil, stone, ceramic, etc.) out of combustible wastes. After that, the first
size reduction is started to prepare 90 mm. wastes by shredding machine.
Figure 2.16 Trammel
Figure 2.17 Separation machine (TPI Polene Ltd., Co., 2011)
The next process is separation by NIR sorting machine (see Figure see Figure 2.18) and
inspection by NIR scanner machine (see Figure 2.19). In general, the moisture content of
RDF is less than 25%, and wastes will be dried again if they have more than 25% of
moisture content. This step also inspects the calorific value and chloride contained of RDF
before using in the incineration. Finally, the size reduction machine is used to reduce the
size of wastes into 30 mm., and then RDF is stored in the silo.
Figure 2.18 NIR sorting machine Figure 2.19 NIR scanner machine
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