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Waste incineration: no problem what technology has a problem?
Time:2016-06-30    Read:1096 Time     Source: Source: journal of science and technology

Is to speed up the construction side, the side of the masses do not understand

At the same time of all over the country to speed up the construction of incinerators, debate and conflict has intensified. It is reported that recently, ningxiang in hunan and hubei xiantao, frequently blocked construction of incinerators for local public do not understand, or even individual cities have built incinerators are also difficult to normal operation.

What waste incineration technology? What effect does to the environment? How to scientific view of MSW? The science and technology daily reporter interviewed concerned expert.
Waste incineration technology no problem

Reporter in waste incineration technology for an interview, central south university, dean of the school of metallurgy and environment of authoritative experts were the answer is: waste incineration technology has been very mature, from the perspective of the theory and technology of no problem.

Environmental science research institute of Shanghai chang, garbage incineration project has many advantages. For example, the same garbage processing, incinerators land area only sanitary landfill of 1/20-1/15; Garbage in sanitary landfill decomposition usually need to 7 to 30 years, and conventional garbage burned by 2 hours can be processed; Amount of garbage, landfill can be reduced about 30%, compost can be reduced about 60%, the burning can decrease capacity about 90%; According to the German authority environmental research institutions research, pollution from waste incineration is only about 1/50 of the sanitary landfill. "Waste incineration energy" are considerable, every tons of garbage can be burning more than 300 degrees, about 5 people to produce living garbage, by burning power generation can meet the daily demand of 1 individual.
Burned since the 1970 s, with the flue gas treatment technology and equipment development of high and new technology, especially in the early 21st century dioxins control and management level improved, waste incineration technology into the mature stage. Through high temperature oxidation treatment not only eliminate pathogen such as bacteria and viruses on the garbage, minimize waste land resources, also can have an effective use of waste incineration heat. Public data show that in the year to June, in our country, has been put into operation in the city is about 180 living garbage incineration power plant, the total capacity of about day processing 160000 tons of garbage, the total installed capacity of about 36000 megawatts, mainly distributed in economically developed areas and big cities. Jiangsu, zhejiang, the largest number of incinerators wide three northeast provinces.
"Garbage incineration and sanitary landfill is the mainstream technology of the most commonly used. A city to choose what kind of garbage disposal method, to adjust measures to local conditions to scientific decision-making. Usually, in densely populated cities, economic development, land resources are scarce, should give preference to waste incineration way." The 24-year-old said.
Technology is no problem, what's the problem?

Incineration technology beneficial garbage disposal, seems to be beyond dispute. But people protest against a wave after wave, where is the problem really out? Experts answer, surprisingly consistent again: management or defects, poor supervision, caused the so-called avoid phenomenon occurred. It seems to some observers, incinerators location facing difficulties mainly is "close to avoid the phenomenon of", "with or without pollution, build elsewhere, I ignore you, in front of my house and my oppose".
In hunan environmental protection association of volunteer service jian-jun he point of view, the domestic waste incineration problem could be on the front end - recycling links do not good enough, leading to the trash burning, easy to produce toxic chemicals, such as dioxin. "Abroad such as Japan, Germany, the garbage FenShaoChang can build a park next to, some even become a local landmark. It has to do with their garbage classification well done."

But, resources and environment, associate professor at central south university wei-chun Yang has a different view. "Garbage classification for waste incineration, it is not necessary and sufficient conditions. Garbage sorting really can rise to reduce garbage processing and pollution emissions, improving the combustion condition and improve the efficiency of power generation, etc. But the incineration technology itself is able to adapt to deal with typical technology of mixed waste, at present most of the garbage incineration cities in the world did not do the garbage classification." Wei-chun Yang said.
To break "adjacent to avoid phenomenon" must first in addition to the "technical arrogance"

If the "close to avoid the phenomenon of" continue to be prevalent, could lead to a waste outlet and the disorder of society as a whole. Interview, the experts called for the government or enterprise to project the possible impact of full disclosure, to really understand the surrounding residents and the interest related parties concerns and expectations, and serious response, to avoid "technical arrogance".
"No matter how advanced, incinerator is a nuisance, to admit that the impact on the environment. Many at home and abroad experience has shown that ecological compensation can be in place in time, is the key to solve the adjacent avoidance phenomenon." A researcher with the ecological environment of the Chinese ming-hui zheng said.

At the same time, the experts suggested that public concerns most in waste incineration is a misunderstanding of science, requires full publicity and interpretation. For example, the dioxin is actually one of dioxin-like, there were about 210 kinds of organic compounds, a few species have toxicity. But not incinerators dioxins pollution, it is a kind of organic heat is produced with chlorine compounds, is a relatively common chemical phenomena.
Under the existing technology, incinerators can make the dioxin in burning completely decomposed in the hearth, through the most advanced system of purification treatment, will the unit dioxins concentration control within 0.1, to the most stringent emission standards in the world.

At present, these problems also gradually got the attention of the authorities. In the first half of this year, dongguan city, urban management bureau in the country take the lead in the incinerator flue gas monitoring information on website, guangzhou is also drawing up the "guangzhou city life garbage terminal treatment facilities regional ecological compensation measures, try to use the ecological compensation mechanism to ease the conflict.

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