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

1.2 Plastic Recycling
This shop find and collet plastic bags from municipal bins, and then owner cut and wash
plastic bags by manual and washing machine. An owner collects two types of all color
plastic bags such as PE and PP (see in Figure C-10). An owner separates these plastics by
sound when she grips. She said that PE has high-pitched and louder than PP. These plastic
bags are divided into two colors such as clear and black color, and all colored plastic bags
are called black color including red, green, blue, etc. this shop sells 100-200 kg/day of all
plastic bags. Table C-5 shows selling prices of plastic bags.
(a) Color PP bags
Table C-5 Selling prices of plastic bags
Types of plastic bags Selling price
(Baht/kg)
PE (clear color) 19
PE (all colors) 12
PP (clear color) 15
PP 12
(b) PP bags (clear (d) Color HDPE bags (black color)
color)
Figure C-10 Plastic bags
151
(c) HDPE bags (clear color)
There is many pretreatments to treat plastic bags before selling to factory such as cutting,
washing and drying. Plastic bags are cut by manual cutting, and a tool is a knife which is
used to destroy seam of plastic bags. Plastic bags will be unclean if they have some
contaminants on seam of bags. Figure C-11 presents show cutting plastic bags to prepare
plastic bags before washing process.
Figure C-11 Cutting process