Roots Blower: An Essential Equipment in the Wastewater Treatment Industry

Wastewater treatment is a crucial process to ensure the cleanliness and safety of water resources. In this industry, various equipment and technologies are employed to effectively remove contaminants from wastewater. One such indispensable piece of equipment is the Roots blower, also known as the positive displacement blower. This article aims to explore the application of Roots blowers in the wastewater treatment industry.

Overview of Roots Blower:

The Roots blower is a type of rotary positive displacement pump that generates air or gas flow by using two rotors operating in opposite directions. It was invented by the brothers Philander Higley Roots and Francis Marion Roots in the 19th century and has since evolved into a widely used equipment in various industries, including wastewater treatment.

Roots Blower Wastewater Treatment
Roots Blower Wastewater Treatment

Application of Roots Blower in the Wastewater Treatment Industry:

  1. Aeration:
    One of the primary applications of Roots blowers in the wastewater treatment industry is aeration. Aeration involves the introduction of air or oxygen into the wastewater to promote the growth of microorganisms that aid in the biological decomposition of organic matter. The Roots blower generates a continuous and steady airflow, facilitating the diffusion of oxygen and ensuring optimal aeration efficiency.
  2. Air Scouring:
    Air scouring is another critical process in wastewater treatment, particularly during the cleaning of filtration membranes in a membrane bioreactor (MBR) system. Roots blowers provide high-pressure air to scour the membranes and dislodge accumulated solids, maintaining the filtration efficiency of the system. The pulsating air flow generated by Roots blowers effectively removes solids from the membranes, enhancing overall system performance.
  3. Sludge Aeration:
    Apart from wastewater treatment, sludge treatment is an integral part of the overall process. Roots blowers play a crucial role in sludge aeration, where the blowers provide a continuous supply of air to the sludge to facilitate the growth of aerobic microorganisms. These microorganisms help break down organic matter and reduce sludge volume, making it easier to handle and dispose of.
  4. Vacuum Generation:
    Vacuum generation is an essential requirement in wastewater treatment plants for various processes such as sludge dewatering and drying, odor control, and chemical dosing. Roots blowers are used to create and maintain the necessary vacuum levels in these applications. The technology’s reliability and high efficiency make it an ideal choice for generating the required vacuum in wastewater treatment facilities.

Benefits of Using Roots Blower in Wastewater Treatment:

  1. High Efficiency:
    Roots blowers operate with high efficiency, delivering a significant volume of air or gas with minimal energy consumption. This characteristic makes them an economically viable option for wastewater treatment plants, reducing operational costs in the long run.
  2. Reliability:
    Roots blowers have a simple design with fewer moving parts, resulting in increased reliability and reduced maintenance requirements. Their sturdy construction ensures long service life and minimal downtime, providing uninterrupted operation for critical wastewater treatment processes.
  3. Compact Size:
    Roots blowers are compact in size compared to other types of blowers, making them suitable for installations with limited space availability. Their small footprint enables easy integration into existing wastewater treatment plants without extensive modifications.
  4. Low Noise Level:
    Noise pollution is a concern in any industrial setting. Roots blowers are designed to operate quietly, minimizing noise pollution in wastewater treatment facilities. This advantage contributes to a better working environment for plant personnel and helps meet regulatory noise control standards.


Roots blowers have become an integral part of the wastewater treatment industry, contributing to the efficiency and effectiveness of the treatment processes. Their applications in aeration, air scouring, sludge aeration, and vacuum generation make them an indispensable equipment in wastewater treatment plants. With their high efficiency, reliability, compact size, and low noise level, Roots blowers continue to play a crucial role in improving the overall performance and sustainability of the wastewater treatment industry.

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