Sludge Eductor for Wastewater Sludge Pumping

Large Equalization tanks are used in Wastewater Treatment facilities for equalizing and blending wastewater.
When Wastewater lies idle in the storage tank, it leads to settling of the solids particles at the bottom of the tank. This settling of solid particles leads to formation of Wastewater sludge which deposits at the bottom of the tank.

This Wastewater sludge deposition is problematic as it reduces the storage capacity. Hence the deposited Wastewater Sludge is removed regularly and disposed off in an environmentally safe manner. Disposal of Wastewater sludge is done using special techniques and requires specific equipment. Hence the Wastewater sludge scrapped and collected from the tanks has to be transported to the disposal site.

Transportation is either done by trucks or by pumping the sludge through pipelines. In large equalization tanks the Wastewater sludge quantity is considerable and transport through pipelines is more convenient option.

Wastewater sludge is a mixture of bio-waste, algae, sand, water and other impurities. It is viscous and sticky in nature and contains solid particles. The sticky nature and presence of solid particles become the prime challenges in pumping the Wastewater sludge through a pipeline.

Sludge Ejectors are essentially liquid ejectors that utilize pumped water for operation. During operation, Sludge Eductors suck the Wastewater sludge from the tanks and mix it with water inside the ejector. The mixture of Wastewater sludge and Water is then pumped out from the Ejector outlet.

Thus the Sludge Eductor also acts as pump and can develop significant head at the outlet This enables the Sludge & Water mixture to be pumped to long distances with help of the Sludge Eductor. The Wastewater sludge is then separated from the water at the pipeline outlet.

Sludge Eductors are perfectly suited for pumping Wastewater Sludge because of their inherent characteristics
• Ability to handle stick and viscous nature of the Wastewater Sludge
• Ejectors do not contain any moving parts and have large internal passage areas, hence are not vulnerable to clogging by solid particles.
• As they have no moving parts, maintenance requirements are very less. Also it reduces largely the risk of abrupt breakdowns, helps in maintaining the regular production schedule
• Service Water is a commonly available utility and hence no additional infrastructure is typically required.