Reading guidance：In China only in the sewage treatment development faster, and sludge treatment is a serious lag. County-level cities are equipped with sewage treatment facilities, but of sewage treatment plants discha

  In China only in the sewage treatment development faster, and sludge treatment is a serious lag. County-level cities are equipped with sewage treatment facilities, but of sewage treatment plants discharge of sludge treatment facilities is extremely limited, even in the blank state. Landfill, open-air piling up, such as improper disposal methods.
   Sludge disposal can be divided into two kinds according to effective utilization: 1. Sludge is disposed as a kind of waste; 2. Sludge is utilized as a kind of resource; landfill is a method which dispose sludge as wastes;
   Air storage is a shortcut for disposing sludge. The application proportion of this kind of methods can directly reflect economic level, environment awareness and technical level of a country. Urban sludge has been as a resource is effectively utilized from the developed countries, such as Europe and the United States. German circular economy law have been from a legal perspective will be sludge definition for material resources, through laws and regulations limit the sludge landfill in order to promote the utilization of sewage sludge. Reduce the growing proportion of landfill, some countries have been zero landfill. China is a developing country, environmental protection has been started for a short time, sludge landfill in quite a long period of time will also be main disposal.
   Sludge resource utilization is based on the sludge is rich in nitrogen, phosphorus, potassium and organic matter containing Ca, Si, Al, Fe and other elements of the minerals and so on, according to the sludge properties and local economic conditions and environmental conditions, through processing technology of reduction, stabilization, harmless treatment, selectively used to improve the land, building materials manufacturing and energy utilization.
   Associated product as the sewage treatment plant, through the appropriate technology selection process can turn waste into treasure. Carries on the reasonable utilization is the main direction of the future development of urban sludge disposal. Technology of sludge recycling can not only effective disposal of sludge, but also to achieve the purpose of circular economy. Sludge resource use, including the use of land and utilization in building materials and energy utilization.
   Urban sludge is disposed as waste has caused many environmental problems, worrying. Although the urban sludge resources of utilization ratio is very small, there are many aspects of the problem, but with enhancement of people's awareness of environmental protection and comprehensive management ability of sludge and improve sludge resource oriented utilization technology development and, this situation will gradually change. Which not only meet the needs of society, increase economic benefits, but also conducive to the establishment of circular economy to sustainable development is the fundamental way to solve the problem of sewage sludge.
  In 12th Five-Year national urban sewage treatment and recycling facilities construction planning, it is clearly put forward that harmless sludge disposal targets: by 2015, municipalities, provincial capital city sludge harmless and municipalities disposal rate of 80%, other city reached 70%, and the county town of 30%. and in accordance with the key to "safety and environmental protection, energy conservation, recycling, economic and reasonable" principle, accelerate the construction of sludge treatment and disposal facilities. This shows that the state of the sludge treatment and disposal more and more, although the relevant standards of the current policy, in the sludge treatment and disposal, funding and technical aspects of the existence of such a problem, but we have reason to believe that will get great development sludge resource utilization. So to realize the resource utilization of sludge are we facing an important research topic, also is our country urgent Problem.
 
 
  

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