1, red: represents harmful substances, sometimes marked with orange. Harmful substances include waste batteries, fluorescent tubes, paints, expired drugs, cosmetics and other substances that are not recyclable and have certain pollution hazards.
2. Green: In the case of a variety of plastic trash cans, green represents kitchen waste, which can be used as fertilizer for plant nutrients, and can be decomposed and absorbed by natural microorganisms and plants after burial, thus playing a role in recycling waste.
3. Blue: It means recyclable garbage, including valuable materials such as plastic, paper and metal, which will be included in the waste recycling system for resource recovery.
4. Gray: In addition to harmful substances and recyclable substances, garbage, bricks, ceramics, muck and other wastes that are difficult to recycle are generally burned and buried.
5. Yellow: It represents a special garbage bin for medical waste, which is generally only used in hospitals, health stations and other medical places.
waste sorting
1. Recyclable garbage includes paper, metal, plastic, glass, etc. Through comprehensive treatment and recycling, pollution can be reduced and resources can be saved. If every 1 ton of waste paper is recycled, 850 kilograms of paper can be made, 300 kilograms of wood can be saved, and pollution is reduced by 74% compared with the same output; Every time 1 ton plastic beverage bottle is recycled, 0.7 tons of secondary raw materials can be obtained.
Every recovered 1 ton of scrap steel can produce 0.9 tons of steel, which saves 47% cost compared with ore smelting, reduces air pollution by 75%, and reduces water pollution and solid waste by 97%.
2. Kitchen waste, including food waste such as leftovers, bones, roots and leaves, can produce 0.3 tons of organic fertilizer per ton by in-situ composting with biotechnology.
3. Hazardous Wastes Hazardous wastes include waste batteries, waste fluorescent tubes, waste water silver thermometers, expired products, etc., which need special safety treatment.
4. Other rubbish. Other wastes include bricks and tiles, waste residue, toilet waste paper and other wastes that are difficult to recycle. Sanitary landfill can effectively reduce the pollution of groundwater, surface water, soil and air.