Sludge refers to the water-containing solid sedimentation material produced during the sewage treatment process, including moisture, volatile substances and ash pathogens and toxic substances. However, due to the relatively high water content of sludge, it needs to be dried before it can be reused. The sludge dryer can achieve "reduction, stabilization and harmless" reuse of sludge.

  The sludge dryer is suitable for drying various sludges, including electroplating sludge, printing and dyeing sludge, chemical sludge, biological sludge, municipal sludge, pharmaceutical sludge, etc. So, what is the use of sludge after drying?

  1. Used for organic fertilizer, soil improvement, etc.

  After the sludge is dried, its moisture and harmful substances will be removed, but the nutrients present in the sludge will not change in any way. Because the sludge contains higher contents of TN, TP, and TK, which are much higher than the ordinary fertilizers we usually use in the fields, and the organic matter content in the sludge is very rich, it can be directly used as agricultural fertilizer after drying. use.

  2. Used to make bricks or cement.

  Making dried sludge into building materials is the current main means of sludge resource utilization. If you use sludge to make bricks, you can add it to clay in a certain proportion to make bricks. During the production process, the sludge will spontaneously ignite to increase the heat of the bricks. Sludge bricks have low cost, stable material, and The strength is equivalent to ordinary red bricks.

  In terms of making cement, the dried sludge is utilized by cement plants and can be used as cement filler. This not only effectively guarantees the quality of building materials, but also ensures the standards during the construction process. It also has a certain degree of economic and ecological existence.

  3. Used for biofuels

  The moisture content of sludge will be reduced by at least 10% after drying. At this time, the sludge can be mixed with a certain proportion of coal to make fuel for burning in the boiler, or the sludge can be mixed with plant waste gases to prepare biomass fuel. The reasonable sludge produced in this way is mixed with coal, Wood chip technology and formula can make biofuels with better combustion properties, which can help reduce fuel consumption costs.

  4. Used for heavy metal recycling

  Some enterprises, such as smelters, printed circuit board factories, and electroplating factories, will contain a large amount of heavy metal elements, such as copper, iron, zinc, chromium, silver, etc., during the wastewater treatment process. These heavy metals often remain in sludge, causing serious pollution not only to soil but also to water resources. But if we process these heavy metals with sludge drying equipment, the metals inside can be smelted and extracted. In this way, considerable economic benefits can be obtained while protecting the environment.

  Zhengzhou Jiutian is a professional sludge dryer manufacturer with many years of experience. You can contact us online or leave message for more detailed information.