Reading guidance：Sludge can be according to the sludge source for municipal waste water treatment plant sludge and industrial waste water generated in the process of industrial sludge treatment. The traditional methods

     Sludge can be according to the sludge source for municipal waste water treatment plant sludge and industrial waste water generated in the process of industrial sludge treatment. The traditional methods of sludge treatment is divided into: sludge concentration, anaerobic sludge aerobic digestion and sludge dehydration, sludge drying. Industrial waste water treatment sludge generated in the process to according to the sewage and sludge composition, properties and the harmfulness to the environment specific disposal. Sludge treatment principle for reduction, harmless, resources, in treatment and disposal should follow the basic principles. This paper mainly discusses the method of sludge treatment.
Sludge concentration
    Water sludge sewage treatment plant and the first industrial waste water generated by the sedimentation rate of about 97%, two times of water biological treatment sludge sedimentation tank production rate of around 99.5%, the sludge volume is large, the proportion is close to that of water, should be made to reduce the sludge concentration, sludge volume, reduce subsequent processing structures to reduce the volume of investment concentrated. After treatment the sludge volume can be reduced by half, reducing the moisture content of about 98%. The sludge thickening technology of sludge gravity thickening, mechanical thickening. Gravity concentration are batch processing and continuous processing, small waste water treatment by batch processing, large-scale sewage treatment plants generally use continuous sludge concentration pool. Mechanical concentration centrifugation technology, flotation concentrate technology. Gravity concentration characteristics of low operation cost, simple operation and maintenance. Mechanical concentrated instead, operation and maintenance requires high investment cost.
Anaerobic digestion of sludge
      Sludge concentration treatment after were digested and the sludge stabilization, reduce the content of organic matter in sludge. Provisions of the countries of large sewage treatment plant supporting sludge digestion process. Sludge anaerobic digestion using a closed structures for sludge treatment, digestion after produce methane gas, used for boiler fuel, power plant and so on.
Aerobic digestion of sludge
     Aerobic digestion of sludge is stabilized sludge treatment under the condition of air or oxygen process, compared with sludge anaerobic digestion, the main characteristics is large energy consumption, does not produce the bio gas and non confined conditions on ambient air impact is bigger, generally rarely used this technology.
Dehydration of sludge
      The water content of sludge thickening and digestion treatment rate is still above 90%, do not use the final disposal of sludge dehydration, should the dehydrated sludge water content reduced to about 75%, semi solid state, convenient transportation. The sludge dehydration often by mechanical dehydration equipment, using belt type filter press plate and frame filter (Van). Machine and centrifugal dehydration machine. With the characteristics of filter press is a continuous, large amount of sludge production, suitable for large water treatment plant; filter press intermittent work, suitable for water yield smaller, smaller occasions; centrifuge high cost, operation cost and maintenance compared to the first two devices are large, by application using the general restrictions. The sewage treatment plant is a belt type filter press. Sludge natural drying treatment by natural evaporation and osmotic dehydration process, generally considered in the use of the land use area, at the same time Affected by the local natural environment, the use of fewer occasions.
     Zhengzhou Taida energy saving drying equipment Technology Co., Ltd. has and well-known colleges and universities research and development of sludge SCDD process, can realize the sharp reduction of the water content in sludge. Company in the paper sludge, printing and dyeing sludge and municipal waste water treatment plant sludge has a rich experience in engineering. In all parts of the country the different natural conditions and economic situation, companies can for you to find a more suitable sludge disposal scheme, can help owners find more appropriate local solutions to the difficult problem of sludge, welcome the owners came to discuss cooperation.
 

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