Korea uses a system called "jongnyangje" for the effective collection of garbage wastes and the reuse of natural resources.
All garbage you produce must be disposed of properly, and you may be fined otherwise. Garbage must be separated according to whether it is "common garbage" (ilban sseuregi), food waste (eumsikmul sseuregi), recyclable (jaehwal yongpum), and large waste objects (daehyeong pyegimul).
Ask your neighbors, your city or neighborhood government authorities, or the management office in your apartment complex about disposal days and proper methods of disposal.

Purchasing Garbage Bags

In cities, regulation garbage bags may be purchased at supermarkets or convenience stores in your neighborhood. In rural areas they may be purchased at the local government offices or through the local women's association (bunyeohoe). There are generally six or seven sizes; 2, 5, 10, 20, 50, and 100 liters, and prices vary according to size.

Disposal Procedures

(1) Common Garbage
Use regulation bags and place outside. Ask the building owner or a neighbor about where to place them. If you don't use regulation bags, your garbage will not be collected.

(2) Food Waste
Remove all moisture and anything that cannot be eaten by livestock, then use a regulation bag for disposal. In areas where there are collection boxes dedicated for food waste disposal, you do not need to use regulation bags. Food waste produced by families and restaurants have high moisture levels, making incineration difficult, and the moisture continues to seep out in the landfill, which in turn pollutes water resources.

(3) Recyclable Items
Materials that are recyclable such as plastic, cans, bottles, and paper should be put in a clear plastic bag or even a sandbag-like bag and put in the appropriate spot on collection day. Spray cans, cooking-gas cans, and other such things can explode, so put a hole in these to make sure they are completely empty.

Paper: Tie newspapers, calendars, magazines, or notebooks in 30 cm bundles. (Ensure cartons are cleaned before disposing of them.)
Glass: Wine, soft drink and medicine bottles must be cleaned before disposing of them.
Scrap iron: Metal chairs, albata (German silver), stainless steel, etc. should be collected separately.
Cans: Beer, soft drink and powdered milk cans should be compressed before disposing of them.
Plastics: Detergent and shampoo containers should be disposed of only after they have been rinsed with water

(4) Large Waste Objects
Televisions, washing machines, other home electronics and large items of garbage that cannot be placed in bags should be placed in the collection spot after attaching a sticker purchased at your local dong office or where you purchase your regulation bags.

Fees (unit : won)
- Refrigerator: 4,000 ~ 8,000
- Television: 3,000 ~ 5,000
- Washing machine: 3,000
- Closet: 10,000 ~ 15,000
- Desk: 4,000 ~ 7,000
- Piano: 15,000

Source: Korea Immigration