Sludge Conveyor

Sludge conveyor is a special equipment for conveying sewage sludge, which is widely used in sewage treatment plants, industrial wastewater treatment sites and so on. Its main function is to convey sludge from one location to another, such as conveying sludge from a settling tank to a sludge dewatering machine, or conveying dewatered sludge to a shipping vehicle.

Sludge conveyor components

  • Driving mechanism: including motor, reducer, transmission shaft, etc., providing power for the rotation of the screw conveyor.
  • U-trough and bracket: U-trough is a container for sludge, and the bracket is used to support the U-trough.
  • Shaftless screw: composed of screw blades and connecting shaft, it is the main component for conveying sludge.
  • Liner: installed in the U-channel, there is a certain gap between it and the screw blade, used to reduce friction and wear.
  • Cover plate: Covered above the U-trough to prevent sludge from splashing.
  • Inlet and outlet: for sludge entering and leaving the conveyor respectively.
  • Fasteners: used to connect the parts.

Sludge conveyor types

  • Shaftless screw conveyor: the most commonly used type of sludge conveyor, not easy to be clogged as there is no center shaft passing through the U-trough.
  • Shaft screw conveyor: simple structure, cheap, but easy to clog.
  • Scraper conveyor: suitable for conveying sludge with high viscosity.
  • Chain belt conveyor: suitable for conveying sludge with long distance.

Selection of sludge conveyor

  • Nature of sludge: including viscosity, water content, particle size of sludge, etc.
  • Conveying distance and conveying capacity.
  • Installation environment: including site conditions, explosion-proof requirements, etc.

Precautions for the use of sludge conveyor

  • Regular inspection and maintenance, timely detection and troubleshooting.
  • Overloading operation is prohibited.
  • It is strictly prohibited to carry out cleaning or maintenance work when the conveyor is running.
  • Sludge conveyor is an important part of sewage treatment system, and the reliability and stability of its operation directly affects the efficiency and effect of sewage treatment. Therefore, the management and maintenance of the sludge conveyor should be strengthened to ensure its normal operation.


Wastewater treatment plants

  • Conveying sludge from settling tanks or primary settling tanks to sludge thickening tanks.
  • Convey sludge from thickening tanks to sludge dewatering machine.
  • Convey the dewatered sludge to the final treatment or disposal facility.

Industrial wastewater treatment site

  • Convey sludge from sedimentation or neutralization tanks to sludge thickening tanks.
  • Convey sludge from thickening tanks to sludge dewatering machine.
  • Convey the dewatered sludge to the final treatment or disposal facility.

Other sites

  • Treatment of sludge generated from power plants, paper mills, food processing plants and other industries.
  • In sludge biogas project, conveying sludge to biogas digester.
  • In sludge composting project, conveying sludge to composting site.


Simply put, the difference between a belt conveyor and a screw conveyor lies in the different structural principles and applications.

  1. Huge amount of sludge generation

With the continuous increase of sewage treatment rate, the sludge generation is also increasing year by year. According to statistics, China produces more than 100 million tons of sludge every year, of which the sludge produced by urban sewage treatment plants accounts for about 70%. The huge amount of sludge generated has brought great challenges to sludge treatment.

  1. Complex sludge composition

The composition of sludge is very complex, which contains a large amount of organic matter, nitrogen, phosphorus and other nutrients, as well as pathogens, heavy metals and other harmful substances. The complexity of sludge’s composition leads to its difficult and costly treatment.

  1. Limited sludge treatment methods

Currently the commonly used sludge treatment methods mainly include landfill, incineration, composting, anaerobic digestion and so on. Landfilling causes soil and water pollution; incineration emits harmful gases; composting requires a large site; and biogas produced by anaerobic digestion is difficult to utilize effectively. Therefore, there is an urgent need to develop new technologies for sludge treatment that are safe, environmentally friendly and economical.

  1. Insufficient utilization of sludge resources

Sludge contains a large amount of organic matter, nitrogen, phosphorus and other nutrients, which are valuable resources. However, the current level of sludge resource utilization is still relatively low, and most of the sludge is landfilled or incinerated, resulting in waste of resources and environmental pollution.

  1. Incomplete sludge treatment regulations

At present, China’s laws and regulations on sludge treatment are still imperfect and lack uniform standards and norms. This leads to the arbitrariness of sludge treatment, safety hazards and environmental pollution problems.

In conclusion, sludge treatment is a complex systematic problem, which needs to be controlled from the source, technological innovation, policy improvement and other aspects in order to truly solve the sludge treatment problem.

Product categories

Popular articles

DAF Sludge

DAF Sludge

DAF systems, also known as dissolved air flotation systems, are…
filter press

Filter Press

Filter press is a kind of solid-liquid separation equipment, which…