Submersible thruster

Submersible jet mixer | High flow rate, low energy consumption, prevents sludge settling

Submersible jet mixers (also known as low-speed jet mixers) are specifically designed for biological treatment tanks, oxidation ditches, and anaerobic/anoxic tanks in wastewater treatment plants. They generate low-speed, large-volume axial water flow to achieve water circulation within the tank, preventing activated sludge sedimentation and promoting full contact between microorganisms and wastewater. The equipment utilizes a high-efficiency hydraulic impeller (fiberglass or stainless steel), a heavy-duty submersible motor, and a simple installation system, offering advantages such as low energy consumption, high thrust, long service life, and maintenance-free operation. It is widely used in municipal wastewater treatment plants, industrial wastewater treatment, oxidation ditches, equalization tanks, and denitrification tanks.

core components

Submersible motor: IP68 protection rating, F/H class insulation, capable of continuous 24-hour operation; built-in overheat and leakage protection sensors.

Impeller: Fiberglass (FRP) or 304/316L stainless steel, hydraulically balanced design, large diameter, low speed, generating efficient axial thrust.

Reduction mechanism: Typically uses helical gear reduction or planetary reduction, ensuring smooth transmission and low noise.

Installation system: Includes guide rod, lifting bracket, lifting rope, and base; allows for lifting and maintenance without draining the pool.

Control cabinet: Optional motor protection controller (overload, phase loss, leakage, over-temperature alarm) and frequency converter soft start.

Working principle

The motor drives the impeller to rotate at a low speed. The curved blades of the impeller push the water backward, forming a continuous, wide axial water flow. This water flow propels the media further away in the pool forward, achieving overall water circulation. The impeller generates low-frequency eddies, rather than high shear forces, thus avoiding the breakup of activated sludge flocs and keeping the sludge suspended to prevent sludge accumulation.

Main advantages

High-efficiency flow propulsion: A large-diameter impeller optimized for hydraulics generates a high-flow, low-shear water flow, achieving a circulation coverage distance of over 30 meters.

Low energy consumption: The low-speed, high-thrust design results in significantly lower energy consumption per unit thrust compared to traditional mixers.

Corrosion-resistant materials: Impellers are available in FRP or stainless steel, while the motor housing is made of cast iron or stainless steel, resistant to wastewater corrosion.

Easy installation and maintenance: The guide rod installation system allows the main unit to be moved to the top of the tank for inspection via a lifting device, eliminating the need for drainage or personnel to enter the tank.

Comprehensive safety protection: The motor is equipped with leakage and over-temperature sensors to prevent burnout.

Various tank types applicable: Suitable for oxidation ditches, rectangular tanks, circular tanks, irregularly shaped tanks, etc.

Technical parameters

Impeller diameter: 800 – 2500 mm

Speed: 36 – 63 rpm

Motor power: 1.5 – 7.5 kW (customizable)

Material: Impeller FRP or SS304/316L; Motor housing cast iron/SS304

Protection class: IP68

Insulation class: Class F (Class H optional)

Insulation angle: 0° – 90° adjustable

Power supply: Customizable

Application areas

Municipal wastewater treatment plant oxidation ditch plug flow system

Anaerobic and anoxic tanks in A²/O process

Industrial wastewater equalization tanks (to prevent sedimentation)

Denitrification tanks (to maintain suspended sludge layer)

Large-scale aquaculture water circulation system. We can provide selection calculations based on your tank size, media concentration, and thrust requirements. Please provide tank diagrams and process parameters for a solution.

Company Profile

AA SS AQUA HITECH CO., LTD. was established in 2005 in Shenzhen, China. It is a leading technology enterprise specialized in the design, manufacturing, installation, commissioning and maintenance of technical solutions for high-difficulty industrial wastewater treatment projects.

Since its establishment, the company has been fully committed to the research of treatment technologies for high-difficulty and refractory industrial wastewater, wastewater recycling and reuse technologies, and wastewater zero-discharge technologies. It strives to achieve low project costs, high outputs and optimization of total social resources.

The water treatment technology solutions and achievements developed by the company have been widely applied in multiple fields of high-difficulty and refractory organic wastewater treatment, including pharmaceutical wastewater, chemical wastewater, pesticide wastewater, laboratory wastewater, coal chemical wastewater, petrochemical wastewater, breeding wastewater, slaughterhouse wastewater, semiconductor wastewater, printing and dyeing wastewater, coating wastewater, landfill leachate, food processing wastewater, mechanical processing wastewater and domestic wastewater.

Adhering to the business philosophy of leading technology, first-class quality and sustainable service, the company endeavors to provide customers with strong technical support and realize the sustainable development and utilization of water resources.

The electrochemical wastewater treatment equipment independently developed and invented by our company can achieve a removal rate of over 99% for COD and ammonia nitrogen in refractory industrial organic wastewater featuring high salinity, high toxicity, high concentration and strong acidity or alkalinity. It has solved the long-standing problem of high-difficulty and complex wastewater treatment in the industrial wastewater treatment industry, representing a significant breakthrough in the treatment scope, methods and effects of high-difficulty and complex industrial wastewater.

CQDHX SERIES EO Electrochemical Advanced Oxidation Technology

Cutting-edge Electrode Manufacturing Technology

Over a 15-year period starting from 2010, we have been dedicated exclusively to the R&D, manufacturing and application of electrodes. Having completed more than 3,000 verification tests on electrode materials and manufacturing processes, as well as over 5,000 experiments on different types of highly complex wastewater, we have tailored the compositions of electrode substrates, surface materials and the deposition conditions of electrode surfaces by integrating the characteristics of various highly complex wastewater types. This has enabled us to achieve optimal performance in treating different categories of highly complex wastewater.

The CQDHX Series Electrode Modules are capable of meeting the requirements for treating highly complex industrial wastewater under extreme conditions. They can effectively remove organic matter (COD), ammonia nitrogen, toxic substances, bacteria, chromaticity, phosphorus and various heavy metals from refractory industrial organic wastewater characterized by high salinity, high toxicity, high concentration and strong acidity or alkalinity.

Working Mechanism of CQDHX SERIES EO Electrode Modules

Electrochemical oxidation is a technology that utilizes an applied electric field to drive chemical reactions for pollutant degradation. Its core reaction occurs at the anode of the electrolytic cell, and the operating mechanisms are primarily categorized into two types: direct oxidation and indirect oxidation, which often function synergistically.

Direct Oxidation Mechanism: Pollutant molecules migrate to and adsorb onto the anode surface. Subsequently, the anode, acting as an electron acceptor, directly extracts electrons from the pollutant molecules, causing their oxidative decomposition. This process is controlled by the mass transfer rate and relies on the catalytic activity and adsorption properties of the anode material, exhibiting a certain degree of selectivity towards different pollutants.

Mechanism of Indirect Oxidation: The anode does not directly oxidize pollutants. Instead, it generates highly oxidizing agents by electrolyzing components within the solution. These agents then diffuse into the bulk solution and carry out homogeneous oxidation of the pollutants. Depending on the type of oxidants generated, the main pathways can be categorized as follows:

Electrochemical oxidation achieves pollutant degradation through two main mechanisms: electron transfer at the anode surface and the in-situ generation of highly oxidizing species. In practical applications, particularly for complex wastewater systems, direct and indirect oxidation often work synergistically. By optimizing electrode materials and process parameters, efficient and advanced treatment of organic pollutants can be achieved.

 Technical Advantages

High Salinity Tolerance: It can effectively remove COD and ammonia nitrogen from unsaturated saline wastewater with a removal rate of up to 99%.

High Toxicity Tolerance: It can effectively remove COD and ammonia nitrogen from highly biotoxic wastewater with a removal rate of up to 99%, while efficiently eliminating the biological toxicity of the wastewater.

High Concentration Tolerance: It can effectively remove COD and ammonia nitrogen from high-concentration organic industrial wastewater with a COD level of ≤ 450,000 mg/L, achieving a removal rate of up to 99%.

Strong Acid-Alkali Tolerance: It can effectively remove COD and ammonia nitrogen from strongly acidic or alkaline wastewater with a pH value ranging from 1 to 11, with a removal rate of up to 99%.

High Safety: The equipment operates at a DC voltage ranging from 3 to 15V, causing no harm to the human body.

No chemical agents are added during wastewater treatment, and no residues or solid wastes are generated.

The electrode modules operate without scaling or clogging.

The equipment achieves a removal rate of 75–100% for high ammonia nitrogen, cyanide breakdown, decolorization, and other pollutants.

No pH adjustment is required for incoming wastewater, which significantly saves on acids, alkalis, labor costs, and floor space, while avoiding secondary pollution.

No water dilution is needed to reduce the salinity of incoming wastewater, decreasing the system’s treatment load and conserving resources.

No water dilution is needed to reduce the COD concentration of incoming wastewater, decreasing the system’s treatment load and conserving resources.

The equipment features a small footprint, occupying approximately 2% of the floor space required by traditional processes of the same capacity.

The equipment has no special environmental requirements and can be installed in well-ventilated, rainproof, non-explosion-proof areas.

The equipment operates with no noise and zero discharge of secondary pollutants.

It features fully automated operation, which is simple, safe, and does not require on-site personnel monitoring.

Equipment Specifications: 0.5T–1000T/h

Electrochemical Oxidation Equipment for Treating Common Pollutants

Application Scenarios:

Treatment of Refractory and Toxic Pharmaceutical Wastewater

Treatment of Refractory and Toxic Chemical Industry Wastewater

Treatment of Refractory and Toxic Pesticide Wastewater

Treatment of Refractory and Toxic Laboratory Wastewater

Treatment of Refractory and Toxic Coal Chemical Industry Wastewater

Treatment of Refractory and Toxic Petrochemical Wastewater

Treatment of Aquaculture Wastewater

Treatment of Slaughterhouse Wastewater

Treatment of Refractory and Toxic Semiconductor Industry Wastewater

Treatment of Refractory and Toxic Dyeing Wastewater

Treatment of Refractory and Toxic Painting/Paint Coating Wastewater

Treatment of Refractory and Toxic Landfill Leachate

Treatment of Food Processing Wastewater

Treatment of Refractory Machining Wastewater

Treatment of Domestic Sewage