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Types of Pumps used for Wastewater Treatment Systems

Posted: 11/02/2020
Category: Wastewater Pump

While it's true that two-thirds of the earth's surface is covered with water, less than 2.5% of it is potable. With increasing population and fast-changing climatic conditions, the need of the hour is the preservation of existing water systems. The role of water treatment plans is crucial. Wastewater management enhances the quality of water, making it suitable for safe consumption. It also helps in the safe release of chemical-laden effluents into the environment.

Wastewater treatment plants are installed in industrial areas, commercial zones and even residential complexes. However, the amount of wastewater, the types of impurities present in water varies from one area to another. Hence, there are several types of wastewater pumps that are specifically used to collect wastewater.

Here, in this guide from Sintech, you can discover the different types of pumps for water and wastewater treatment. At Sintech, we offer both installation of new wastewater pumps for industries and commercial buildings, as well as replacement parts to ensure that your wastewater pumps continue to function correctly.

2 Common Types of Wastewater Pumps


Wastewater treatment pumps can be classified into the following three types:

1. Positive Displacement Pumps


Positive displacement pumps force out a specific volume of fluid into a discharge pipe. It is available in a variety of configurations like:

Diaphragm Pumps


Diaphragm-PumpsThese pumps make use of hydraulic fluid or air to displace wastewater in a specific direction. The basic operating principle is that – water flows when the diaphragm is open and stops when the diaphragm is closed.

Gear Pumps


Gear-PumpsAs the name implies, gear pumps displace wastewater by turning gears inside the pump. The action of the gears creates a suction that takes in wastewater from one side and moves it to the other side.

Lobe Pumps


Lobe-PumpsThese pumps offer superior control over the flow of water. It works by pushing wastewater in a controlled manner and in a single direction.

When positive displacement pumps are adequately maintained and serviced regularly, they last for years to come without any downtime.

2. Dynamic Displacement Pumps


At Sintech, besides offering positive wastewater displacement pumps, we also offer dynamic displacement pumps for use in wastewater treatment plants. The significant advantages of this pump category are that it offers the best performance and enhanced reliability.

The common types of dynamic displacement pumps include:

Centrifugal Pumps


Centrifugal-PumpsCentrifugal pumps make use of a centrifugal force to build velocity, which in turn, displaces the fluid. Fast-spinning impellers are the main components of centrifugal pumps. Impellers have a similar operation to fans. It has a small intake valve and a large outlet. Some of the reasons why centrifugal pumps are popular for wastewater treatment plants are:

  • Low maintenance

  • Simple design

  • Moving parts that are durable and long-lasting

  • Effective operation

  • Pressure is self-limited

    Submersible Pumps




Submersible-PumpsSubmersible pumps are placed directly in the wastewater or slurry. It offers added pumping power to remove fluids from a specific area. Generally, submersible pumps are used in the draining of fluids in wastewater plants.

Specialized Pumps


Besides these common types of wastewater pumps, there are other specialized pumps designed for specific needs. They are:

  • Circulation Pumps – These pumps keep the slurry circulating throughout the system.

  • Agitator Pumps – It generates kinetic energy surrounding the fluid intake.

  • Progressive Cavity Pumps – In a progressive cavity pump, storage tanks or pipelines are used for the displacement of fluid from the suction side to the discharge side.


Other specialized pumps include trash pumps, mixed flow pumps, lift stations, peristaltic pumps, rotary lobe pumps, and airlift pumps.

Factors to keep in mind while choosing Pumps for Wastewater Treatment Plants


Any pump that you use for a wastewater treatment plant must be strong enough to withstand abrasion and corrosion caused by the slurry and wastewater. All industrial pumps used in metal processing plants, food and beverage industries, chemical industries, paper manufacturing units, and others require durable and heavy-duty pumps.

Before choosing a pump, it's essential to assess the requirements – the volume of wastewater generated, contamination type, effluents present in the water – to pick the right pump that minimizes maintenance cost and lasts for a long time.

At Sintech No.1 pump suppliers for wastewater treatment, all our pumps are made of the highest quality materials offering reliable performance and durability. We also offer customized wastewater pumps to suit the different requirements of various wastewater treatment plants. Give us a call today at +91 120 4176000 to discuss your requirements with our expert technicians.

We look forward to helping you find the best pump for your wastewater treatment plant.

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