Reading guidance：It is well-known that the pollution control in china is started late. China began to pay attention to Governance Pollution and began to take measures relatively late. In the sewage treatment process, t

      It is well-known that the pollution control in china is started late. China began to pay attention to Governance Pollution and began to take measures relatively late. In the sewage treatment process, the primary treatment process will produce primary sludge, in the two stage process will be a lot of surplus sludge. At the same time, because of the sludge the processing cost is much higher than the sewage treatment cost and environmental benefits than the environmental benefits of effective sewage treatment slow, allows companies and local governments pay more attention to sewage treatment, in order to obtain fast environmental benefit. At the same time in order to save the environmental cost, the sludge is usually landfill or casually piled into the field or in the river. The high water content of sludge, the sludge volume is larger, if the use of landfill disposal, will occupy a lot of land. If the dumping of sludge containing the pollution components will be released into the environment and cause secondary pollution.
     In recent years, pollution incidents of sludge broke out frequently, the public and the government began to pay more and more attention from the disposal of sludge. The country increasingly improve the sludge treatment and disposal policies to promote the treatment and disposal of sludge from sewage treatment plant sludge treatment. With this year on environmental policy has become increasingly harsh, our existing sewage treatment plant sludge treatment measures have started to begin construction. However, both the technical staff or experts to find a suitable for China's national conditions, less investment, low operation cost, simple process of sludge treatment, sludge treatment sludge treatment technology route after the high success rate. At present, it is a difficult work and task. It is also focus for sludge treatment technology research and development. In addition to the development of sludge treatment process, we should also do the unity of sludge and sewage, which was regarded as a feasible path for the treatment of sludge by many experts.
Uniform establishment between sludge disposal facilities and sewage disposal facilities  
      Generally, sewage treatment facilities in sewage treatment plants are perfect. Disposal technologies are relatively mature. Effluent index is more stable. Establish the sludge treatment system of sewage treatment plant. sludge treatment plant to save construction investment. At the same time, the sewage treatment and sludge treatment are more coherent. save time, manpower and cost of capital. Based on the existing sewage treatment plant sewage treatment facilities, the use of the original distribution system and some processing workshop only need to add a sludge pressing machine, filter press, diaphragm filter press sludge dehydration equipment and etc. This machine not only can achieve the effect, but also reduce the need for additional business.
Unify plans for sewage and sludge disposal
    In the process of sludge disposal, it is emphasized to decide plans according to water quality. Before treatment, source of sewage and water quality should be analyzed. combined with the main component of sewage and other factors of sewage treatment, design a series of scientific and effective treatment schemes, makes the process more coherent, more economic cost of treatment. The final sludge can also achieve the greatest degree of sludge resource.
Unify operation modes of sewage and sludge
     Operation modes mentioned here refer to sewage treatment, sludge treatment process, and in the process of charging standard of overall operation. Sludge treatment equipment investment, construction investment and operation cost add to the collection of sewage treatment fees, forming the charging mechanism of sewage and sludge integration and unified accounting. This reduces the miscellaneous sludge disposal charging mechanism, which can be suitable for sewage sludge treatment  and enable sustainable operations.
 
   
 
   

：Selection of dehydrator in sludge disposal process ：Economic development highlights problems of sludge disposal