真人做人爱试看一

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          Sludge disposal is inclined to energy utilization

          Author: Taida machine       Release time:2016-08-24
          Reading guidance:Sewage generated in the process of settling material and from the water surface floating floating foam residues obtained said sludge, which belongs to a kind of solid waste. At present, Chinas annual e
             Sewage generated in the process of settling material and from the water surface floating floating foam residues obtained said sludge, which belongs to a kind of solid waste. At present, China's annual emissions of dry sludge is about 5 x 106t[1], and in increasing. Sludge composition is very complicated, which although containing large amounts of nitrogen, phosphorus, and other major elements, trace elements and organic matter can use of components, but also contain toxic, harmful and difficult to degradation of organic matter, pathogenic bacteria, parasites (eggs) and heavy metal and so on.
            The main characteristics of the sludge is high moisture content (up to 99%), high organic matter content, easy to corruption stinks, and the particle size is small, only a small proportion, a colloidal liquid, if disposed of properly will on ecological environment and human caused great harm. Therefore, how to reasonable set sludge increasingly subject to national attention.
          1. Selection of sludge disposal methods
           Investment and energy in the discussion on treatment of sludge disposal, there are usually two kinds of views. A view of after treatment of sludge landfill, cast into the sea, incineration, composting, pyrolysis of building materials are regarded as "disposal"; another kind of view thinks that only landfill or sea row is the true meaning of "disposal" and other such as composting, incineration, pyrolysis and its building materials can be considered sludge resource utilization. But no matter what kind of view is correct, because the paper sludge resource utilization. Therefore, the current domestic and foreign sludge of 3 kinds of main disposal method (sanitary landfill, incineration of sludge, sludge sea) and resource utilization are briefly compared.
           A. Sanitary landfill
           The method has the advantages of simple operation, less investment cost, low cost, adaptability is strong, but the occupation of the land, serious and if the seepage technology is not enough will lead to potential contamination of soil and groundwater pollution. With the amount of sludge is increasing, its problems are more prominent, it is easy to cause secondary pollution, aggravate the leachate collection and treatment system and municipal sewage treatment system load. In addition, a large quantity of sludge deposited directly the landfill operation formed on the surface of the marsh.
           B. Sludge incineration
           Sludge contains a certain amount of organic components, the dehydration and drying of sludge can be burned to be treated, so that the total organic carbon and kill pathogens, maximize reduce the sludge volume. The shortcomings of the method in processing facilities, large investment, high processing costs of and in addition, organic matter burning will produce toxic substances.
           C. Throw sludge to sea
           The method is a simple processing method. But with ecological environment consciousness continuously strengthened, people more and more attention sludge and throw themselves into the sea to the marine ecological environment may cause effect. The United States in 1988 has banned ocean dumping of sludge, and in 1991 comprehensive be prohibited. Japan on sludge oceanic jettison the strict regulations. The regulations of the Chinese government: February 20, 1994 has no longer in sea disposal of industrial waste and sewage sludge.
           D. Use sludge as resource
           The method can solve the problem of sludge disposal, avoid the pollution of the urban ecological environment, saving disposal costs, turning waste into treasure, the has good ecological benefits, environmental benefits, economic benefits and social benefits is city to achieve sustainable development and the realization of circular economy is the inevitable requirement. Therefore, from the economic development, resources development and utilization, urban ecological and environmental protection and other aspects to consider, ideal way of urban sludge disposal should is the use of resources.
           2. Make sludge into energy
           Sludge resource utilization, there are many methods, such as sludge for agricultural use, garden utilization of sludge, sludge compost utilization, sludge in the production of building materials products, sludge energy etc.. Firstly, we analyze energy of sludge at home and abroad of the status, through the domestic and foreign present research of some new technologies and the research development condition, to explore its application prospect in domestic sludge energy utilization.
           Current situation of sludge utilization at home and abroad
           A. At abroad: foreign developed countries sludge energy technology development is relatively mature, but also from the sludge treatment technology gradually explore the formation of. At present, there are more molding technology: sludge fermentation to produce biogas power generation; II sludge combustion power generation; 3 sludge pyrolysis of oil technology; (4) is still in the pilot phase of the study of sludge hydrogen production technology.
           B. At home: In our country urban sludge treatment, disposal and resource technology has just started, is still used to land utilization and other use, supplemented by the resources of, the form is single and the utilization rate is not high, and foreign advanced countries compared there is still a large gap.
              At present, our country is facing the huge pressure of energy and environment, energy and mineral resources increasingly depleted, developing and producing various kinds of renewable energy to replace coal, oil and natural gas and other fossil fuels in the future is an effective way to solve the energy shortage. Therefore, our country also gradually began to pay attention to recycling of energy. Especially with large amount of organic matter in the sludge, provides the necessary material foundation for the utilization of energy. Although the domestic sludge energy utilization technology has not yet fully formed, compared with foreign countries has not yet widely applied, but the energy recovery of some sludge abroad in the domestic advanced technology, also carried out in the test in order to provide guidance for engineering practice the later.
             Zhengzhou Taida drying equipment Technology Co., Ltd, as a professional environmental service, can provider services for municipal, industrial and rivers of sludge treatment and disposal. it can also provide consulting, design, construction, equipment integration, operation and investment services. Taida has estabilished long-term cooperation with relevant companies and the Chinese Academy of Environmental Sciences, such as Nanjing University, Tianjin University, Nankai University, Southeast University and other famous universitie. with strong technical strength, harmnious construction, natural ecological environment responsibility,  customers can creat values!
           

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          真人做人爱试看一

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