1. Recyclable garbage: mainly includes five categories: waste paper, plastic, glass, metal and textiles. Waste paper mainly includes newspapers, periodicals, books, all kinds of wrapping paper, office paper, advertising paper, cartons, plastic bottles, old clothes and so on.
2. Hazardous wastes: mainly including waste batteries, waste fluorescent tubes, waste water silver thermometers, expired drugs, etc. These wastes need special treatment.
3. Kitchen waste: mainly includes food waste such as leftovers, bones, roots, leaves and peels. After in-situ composting by biotechnology, about 0.3 tons of organic fertilizer can be produced per ton.
4. Other garbage: mainly including bricks and tiles, muck, toilet waste paper, paper towels and other wastes that are difficult to recycle except the above garbage. Proper treatment can effectively reduce the pollution of groundwater, surface water, soil and air.