Roots Blowers for Wastewater Treatment | High-Efficiency Aeration Solutions

Roots blower: an important supporting component in sewage treatment

Roots blower is an important supporting component in sewage treatment, which provides high-pressure airflow to achieve functions such as aeration and oxygen supply, stirring and mixing, air flotation and pollution removal, filter backwashing, sludge treatment, and odor transportation, significantly improving treatment efficiency and reducing operating costs. The following is an analysis of the specific role of Roots blowers in wastewater treatment:

1. Function: Aeration for oxygen supply, driving biodegradation

*Key roles in activated sludge process

The Roots blower injects high-pressure air into the aeration tank through an aeration disc or diffuser, generating microbubbles (with a diameter of 1-3mm), significantly increasing the contact area between oxygen and sewage. Adequate dissolved oxygen (DO) maintains aerobic microbial activity, accelerates the decomposition of organic matter (such as BOD and COD), and ensures that the effluent quality meets the standard. For example, after introducing Roots blowers into a sewage treatment plant, the treatment capacity increased by 20% and the compliance rate significantly improved.

*Adaptability to deepwater scenes

Compared to low-pressure blowers, Roots blowers can overcome deep water static pressure (such as 5-8m water depth), ensure oxygen transfer efficiency, and are suitable for large-scale sewage treatment plants or industrial wastewater treatment projects.

2. Multi scenario application: covering the entire process of sewage treatment

*Mixing and stirring: prevent sludge sedimentation

The Roots blower agitates the water body through airflow, promoting full contact between sludge and wastewater. In anaerobic reactors such as UASB, stirring enhances reaction efficiency; In the regulating tank, avoid sedimentation of suspended solids and reduce the subsequent processing load.

*Air flotation decontamination: efficient separation of suspended solids

The Roots blower generates tiny bubbles to adsorb suspended solids such as oil and paper fibers, forming a "gas-solid mixture" that floats to the surface for easy removal. This technology is widely used in the treatment of oily wastewater and food industry wastewater, with a removal rate of over 90%.

*Backwashing of filter media: restoring filtration capacity

In sand filter and activated carbon filter, Roots blower provides reverse high-pressure airflow, penetrates the dense filter layer, removes blockages (such as particles and colloids), prolongs the service life of filter media, and reduces replacement costs.

*Sludge treatment: dewatering and transportation

*Dehydration assistance: Roots blower accelerates the discharge of water from sludge, reduces sludge volume, and lowers subsequent filtration or incineration costs.

*Airflow transportation: Dry sludge is transported to designated locations through pipelines to achieve automated processing and reduce manual intervention.

*Odor treatment: ensuring environmental safety

The Roots blower blows the collected odors (such as H ₂ S, NH3) into the biological filter or chemical treatment device, purifying the air through oxidation or adsorption to avoid secondary pollution.

3. Technical advantages: energy-saving, durable

*Efficient oxygen supply and energy-saving design

Roots blower can adapt to different working conditions. Its transmission efficiency is over 90%, making it more energy-efficient.

*Corrosion resistance and low maintenance

Material optimization: The impeller and casing can be made of stainless steel or anti-corrosion coating, which is suitable for acidic and high salinity water quality and extends equipment life.

Oil free design: reduces pollution risks, with a lifespan of 15-20 years or more, and lowers operation and maintenance costs.

Modular structure: Compact design saves space and facilitates integration into existing systems.

*Intelligent monitoring and stable operation

Some Roots blowers are equipped with intelligent control systems that monitor temperature, vibration, and other parameters in real time, warn of faults, and ensure continuous and stable operation. Its low-noise design (≤ 80dB) meets the requirements of clean workshop environment.

4. Selection and Case Study: Matching Processing Requirements

*Key parameters for selection

Airflow and pressure: Calculated based on water depth and processing capacity, for example, higher pressure (58.8-78.4kPa) is required for deep water aeration.

Material selection: Stainless steel or anti-corrosion coating models are preferred for acidic or high salinity water bodies.

Energy consumption optimization: Variable frequency control can adjust air volume and reduce operating costs.

*Typical application cases

Industrial wastewater treatment: A chemical plant uses Roots blower with activated sludge process to treat high concentration organic wastewater, achieving a COD removal rate of 95%.

Aquaculture: Roots blowers use microporous aeration technology to increase dissolved oxygen in aquaculture ponds, increase fish growth rate by 20%, and reduce mortality rate by 15%.

Food industry: In beverage production lines, Roots blowers are used for bottle drying and air filtration to ensure product hygiene and safety.