The growing awareness of environmental protection and the successful experience of some developed countries in waste separation and disposal, as well as the attention paid by the State in this regard, have all contributed to the emergence of separated garbage cans.In October 2003, the State introduced the "Symbol for Separation of Municipal Domestic Waste". According to the unified sign set by the state, domestic garbage is divided into four categories, which are recyclables, food waste, hazardous waste and other garbage.
Recyclable garbage: It mainly includes five categories: waste paper , plastic, glass, metal and fabric.
Waste paper: mainly including newspapers, periodicals, books, all kinds of wrapping paper, office paper, advertising paper, cardboard boxes, etc., but pay attention to paper towels and toilet paper, due to the water solubility is too strong can not be recycled.
Plastic: mainly including various plastic bags, plastic packaging, disposable plastic lunch boxes and cutlery, toothbrushes, cups, mineral water bottles, toothpaste skins and so on.
Glass: mainly includes various glass bottles, broken glass pieces, mirrors, light bulbs and so on.
Fabrics: mainly include discarded clothes, tablecloths, washcloths, school bags, shoes, etc.
Metal objects: mainly cans, can boxes, etc.
Food waste: including leftovers, bones, vegetable roots, leaves, peels and other food waste, composted by biotechnology on-site treatment, each ton can produce 0.3 tons of organic fertilizer.
Household garbage: not only kitchen, living room, but also toilet and other garbage.
Hazardous waste: including waste batteries, waste fluorescent tubes, waste water thermometers, expired medicines, etc. These wastes need special safety treatment.
Other garbage: Including masonry ceramics, slag bathroom waste paper, paper towels and other wastes that are difficult to recycle in addition to the above categories of garbage, taking sanitary landfill can effectively reduce the pollution of groundwater, surface water, soil and air.