Landfill leachate treatment has been of great concern as a worldwide treatment problem. In recent years, with the emphasis on the state and the tightening of environmental protection policies, the landfill leachate treatment market has gradually been opened up. To correct and effective treatment, get rid of non-compliance difficulties, improve landfill leachate treatment without delay.
Landfill leachate dealt with the frequent pitfalls to overcome technical problems or can be broken
With the increase of urban population, the amount of garbage produced is more and more. The treatment of landfill leachate has become a hot issue in the field of environmental protection and water. At present, landfill and incineration are the main waste disposal methods in China. Therefore, landfill leachate treatment needs are also mainly landfills and waste incineration plants.
At the same time, in order to achieve the goal of full coverage of MSW decontamination, during the 13th FYP period, a new batch of MSW decontamination facilities will be built in China, of which landfill will be the main type. The industry said the demand for landfill leachate treatment facilities will gradually market, domestic landfill leachate treatment industry boom will also be significantly improved.
According to the "Thirteen-Five National Urban Domestic Waste Harmless Treatment Facility Construction Plan" issued by the National Development and Reform Commission, the innocuous treatment capacity of newly added domestic garbage during the "Thirteenth Five-Year Plan" period was 490,000 tons, accounting for both incineration and filling treatment Half of the ratio calculation, "13th Five-Year" period, China will add leachate treatment investment of about 17.15 billion yuan.
Driven by policies and markets, leachate treatment has a bright future and the industry is well positioned to grasp its market. Prospective Industry Research Institute believes that during the "Thirteen Five" leachate treatment industry in China is expected to invest about 26 billion yuan.
However, due to the implementation of the past policies, the supervision is not strict enough, garbage disposal plants exceed emission standards, and even the phenomenon of waste disposal and drainage is frequent, and frequent leachate disposal is not in order. Long-term study of leachate treatment China Academy of Urban Construction Cai Hui, vice president of the environment, said the treatment of landfill leachate is a global problem, water quality changes is too large is difficult to achieve an important reason.
Why landfill leachate treatment so difficult? In addition to the above reasons, the industry believes that it also includes the following three reasons: 1, the leachate composition is complex, high concentrations of pollutants, post-processing difficult, the current treatment technology can not meet the water requirements; 2, the cost is too high, Unbearable cost pressures, to take waste disposal, discharge and other means of emissions; 3, lax supervision.
As we all know, if not timely landfill leachate collection, treatment, will cause groundwater, surface water and landfill environment pollution and impact. With the establishment of a more stringent environmental supervision system, it is even more urgent to properly and effectively treat leachate. Among them, the top priority is the technology upgrade.
Speaking of landfill leachate treatment technology, at this stage the main landfill disposal: physical and chemical methods, biological treatment methods and land treatment methods. In the specific treatment process, according to the infiltration of leachate water quality, water and emission standards, select the specific combination of treatment processes.
With the continuous improvement of related technology, the following three treatment methods, due to their respective advantages, will be widely used in practice, or will solve the problem of landfill leachate treatment.
Back spray method, for some more leachate dry substance, you can take the method of spray back to improve the combustion rate and reduce the leachate harmful substances content, suitable for more yield and low heat situation.
In the membrane technology development and promotion of universal, the use of reverse osmosis has high efficiency of interception of dissolved organic and inorganic pollutants in the nature of the sewage, reverse osmosis has become the main method of landfill leachate treatment.
Biochemical treatment method, to the permeate by adding some chemicals, so that some of the pollutants can continue to be the reaction of the resulting material in the content of pollutants can be controlled within the prescribed standards, can thoroughly solve the pollutants.
Conclusion
In the current environmental protection situation, the government has pushed through the policy to open the landfill leachate treatment market. Through proactive research and development, the company improves its technology and continuously improves landfill leachate technology. Believe that in the hard work of all walks of life, in the near future, the problem of landfill leachate will be properly solved.
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