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China garbage classification
China will be divided into four city garbage group, respectively refuse materials (including glass, magnetic and non-magnetic metals, paper, rubber, plastics), organic waste (kitchen garbage, biological waste), Inorganic rubbish (furnace slag, brick and tile, ceramic, etc.), toxic and hazardous waste (used batteries, fluorescent tubes waste, pesticides, containers of expired drugs, medical waste and waste television sets, telephones, computers and other electrical waste e-waste).
China city garbage started late, and in the 1980s began to waste disposal. Before the garbage dumps are open.
The China Environmental Protection Industry Association of urban life garbage information on the Commission, in 1990, China's urban garbage treatment rate of less than 2%. In the 1990s, China was the only city garbage continues to increase. 1999, 668 Chinese cities for a total of garbage disposal plant (field) 696, including 200 less than the sound of the treatment plant, waste disposal rate of 63.4%, sound processing rate was only 20.3 %.
At present, China's cities only wastes disposal sites have more than 700, the National MSW harmless treatment rate of 52%.
China city garbage collection to go through first. Currently, China's urban refuse collection methods to collect basic mixed, although in 2002 the Chinese government to promote the separate collection, waste separation and collection currently accounts for only 16 per cent.
Mixed collection are the three major ways, first, the collection containers will be placed in fixed locations, daily sanitation specialized personnel responsible for the collection of these containers in the garbage. Second, in small residential area built fixed RCP, the residents refuse daily life can be thrown into the garbage station. Third, it is rubbish Road. However, the outbreak of atypical pneumonia in 2003, due to the spread of germs, garbage, many cities were disabled.
Collected garbage from the garbage truck specially shipped to refuse transfer station. Waste transporter is fully enclosed. Waste were shipped to the station after a first step to deal with. First-classification by classification are divided into organics and inorganics, as well as the use and non-use. The large volume of waste but also compressed. After the garbage was classified removed.
Shipped out from the refuse transfer station, and some were shipped to the sanitary landfill will be filled garbage pits have been prepared to cover stamping and compaction, in its biological, physical and chemical changes, organic matter decomposition achieve reductions and sound purposes. In these pits shops specialized channels, and impervious layer, used for the collection of refuse from fermentation gases and leachate. After burning gas, leachate treatment as part of the purification of water, refuse vehicles, as well as for cleaning dust ground, and after some leachate filtered to meet emissions standards at the national level out, the environment will not be polluted.
Some were shipped to a composting plant, after composting, garbage into health, tasteless humus for the fertilizer plant.
Part was sent to the incinerator in the incineration to dispose of combustible ingredients fully oxidized to produce heat for electricity generation and heating. At present, China completed, and construction is being submitted for approval in the garbage power plant has 140. Generating a ton of garbage can be 300 degrees, also used for heating Heat. Tianjin Shuanggang Garbage Power Plant, 1,200 tons of waste disposal, the generating capacity of 120 million for 50,000 residents in the lives of electricity a year, equivalent to 48,000 tons of standard coal conservation.
The use of recyclable waste will be recycled or reused.
To deal with the litter in the process, China formulated a number of criteria, such as farm towns garbage control standards, the burning of emission standards.
In the current method of waste disposal, incineration of waste disposal development in China slow, mainly because of a shortage of funds. Incineration pre invest more, the construction of a 1,000 tons of waste disposal, the incinerator and its subsidiary heat recovery equipment, will require approximately 7-8 billion yuan. Since incineration and disposal of refuse will produce dioxin gas, and many cities in addition to the need for handling medical waste, the disposal of refuse incineration little use. Many cities use more of the sanitary landfill method, this method is more suitable environmental officials believe that China's national conditions.
The China Environmental Protection Industry Association Committee urban life garbage data, China's urban garbage in the landfill refuse treatment accounted for 70%, 20% composting, incineration accounted for 5% Others (including open dumps, recycling use) or 5 per cent.
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