Products Description
VIVAMIX manufactures Submersible Mixed Liquor Recirculation Pumps for low-head, high-flow transfer between biological treatment zones. Designed for continuous underwater operation, the pump delivers up to 6,048 m³/h, with available discharge diameters from DN400 to DN800 and motor power from 1.5 to 22 kW. Its stainless steel construction, adjustable propeller blades, IP68 submersible motor and guide-rail installation system make it a dependable choice for nitrate-rich mixed liquor return, denitrification and total nitrogen removal in municipal and industrial wastewater treatment plants.
As a direct wholesale factory, VIVAMIX provides equipment selection, non-standard manufacturing, performance matching, inspection documentation and global technical support for wastewater engineering companies, EPC contractors, distributors and treatment plant operators.
Core Product Performance Parameters
Low-Head, High-Flow Hydraulic Design
Unlike conventional sewage pumps designed for higher lifting pressure, the VIVAMIX submersible recirculation pump is engineered for applications requiring a large circulation volume with limited static head.
The propeller-type hydraulic structure moves mixed liquor efficiently through a recirculation channel or through-wall pipe. It is suitable for internal recirculation duties where energy consumption, flow stability and resistance to clogging are more important than high discharge pressure.
Key operating advantages include:
- Maximum rated flow up to 6,048 m³/h
- Available head range from approximately 0.25 to 2.00 m
- Low-speed propeller operation for large-volume transfer
- Adjustable blade configuration for different operating points
- VFD-compatible operation for recirculation ratio control
- Compact submerged installation without a conventional dry pump room
Detailed Model Selection Data
| Model | Power | Flow | Head | Rated Current | Speed |
|---|---|---|---|---|---|
| VM-W400 | 1.5 kW | 180–990 m³/h | 0.25–0.86 m | 5.8 A | 740 rpm |
| VM-W400 | 2.5 kW | 270–1,116 m³/h | 0.30–1.02 m | 9 A | 740 rpm |
| VM-W400 | 3 kW | 325–1,260 m³/h | 0.30–1.15 m | 11 A | 740 rpm |
| VM-W400 | 4 kW | 340–1,650 m³/h | 0.35–1.20 m | 12 A | 960 rpm |
| VM-W600 | 4 kW | 360–2,340 m³/h | 0.26–1.15 m | 14.2 A | 480 rpm |
| VM-W600 | 5 kW | 415–2,450 m³/h | 0.28–1.26 m | 18.2 A | 480 rpm |
| VM-W600 | 7.5 kW | 485–2,735 m³/h | 0.35–1.46 m | 28 A | 480 rpm |
| VM-W600 | 10 kW | 666–3,000 m³/h | 0.42–1.76 m | 32 A | 480 rpm |
| VM-W600 | 15 kW | 954–5,364 m³/h | 0.40–1.78 m | 43 A | 480 rpm |
| VM-W800 | 15 kW | 954–5,364 m³/h | 0.40–1.78 m | 43 A | 480 rpm |
| VM-W800 | 18.5 kW | 994–5,670 m³/h | 0.43–1.82 m | 51 A | 480 rpm |
| VM-W800 | 22 kW | 1,044–6,048 m³/h | 0.44–2.00 m | 60 A | 480 rpm |
Final flow and head performance depend on blade angle, installation geometry, pipeline resistance, liquid properties and the required internal recirculation ratio.
Construction Materials
The standard configuration is designed for long-term immersion in municipal and industrial wastewater:
| Component | Standard Material |
|---|---|
| Propeller | Stainless steel 304 |
| Motor housing | Stainless steel 304 |
| Motor shaft | Stainless steel 420 |
| Bracket and guide loop | Stainless steel 304 |
| Seal ring | Nitrile rubber |
| Mechanical seal | Silicon carbide versus silicon carbide |
| Motor protection | IP68 |
| Insulation class | Class F |
A double mechanical seal arrangement helps protect the motor chamber from wastewater ingress. Each unit can be inspected for material conformity, insulation resistance, sealing performance, rotation and no-load operation before shipment.
Standard Working Conditions
The standard pump is suitable for:
- Liquid temperature up to 40°C
- pH range from 5 to 9
- Maximum submergence depth of 10 m
- Continuous underwater installation
- Mixed liquor and wastewater without large hard solids
- Low-head recirculation channels and through-wall pipe systems
Wastewater containing high chloride concentrations, aggressive chemicals, abrasive particles or unusually high temperatures should be reviewed before model confirmation.
Applicable Wastewater Treatment Systems and Processes
A/O and A²/O Systems
The pump returns nitrate-rich mixed liquor from the aerobic tank to the anoxic tank, supporting denitrification and total nitrogen removal.
MBR Wastewater Treatment Plants
It provides stable mixed liquor circulation between biological treatment zones and can be operated with a variable-frequency drive according to influent loading
MBBR Treatment Systems
The low-head, high-flow design supports circulation between treatment compartments without generating unnecessary discharge pressure.
Oxidation Ditches
The pump can be used for process circulation and large-volume transfer where the static water-level difference is limited.
Typical municipal applications include:
Nitrified mixed liquor return
Anoxic-zone internal recirculation
Activated sludge process circulation
Biological nitrogen-removal systems
Retrofit projects with limited installation space
Expansion of existing treatment capacity
Industrial Wastewater Treatment
The pump can also be configured for food processing, beverage production, paper manufacturing, textile wastewater, chemical processing, livestock wastewater and other industrial treatment facilities.
For industrial wastewater, the liquid composition must be reviewed before selecting the propeller material, seal elastomer, motor configuration and protective coating.
Customized Specifications
Hydraulic Selection Based on Actual Process Data
VIVAMIX does not recommend selecting a recirculation pump by motor power alone. The required pump should be matched to the biological process and actual hydraulic resistance.
For accurate selection, the following information is normally required:
| Selection Information | Required Details |
|---|---|
| Required return flow | m³/h or L/s |
| Total dynamic head | Static level difference plus pipeline losses |
| Treatment process | A/O, A²/O, MBR, MBBR, oxidation ditch or other |
| Wastewater type | Municipal or industrial |
| Tank dimensions | Length, width and operating water depth |
| Installation method | Guide rail, wall mounted or project-specific |
| Pipe diameter | Through-wall pipe or circulation channel dimensions |
| Voltage and frequency | For example, 380 V/50 Hz or 460 V/60 Hz |
| Control requirement | Direct-on-line, soft starter, VFD or intelligent control |
| Material requirement | SS304, SS316 or project-specific material |
Available Customization Options
Depending on the project, customization may include:
SS304 or SS316 wetted components
Project-specific motor voltage and frequency
Customized cable length
Guide-rail installation system
Wall-mounted installation structure
Through-wall pipe connection dimensions
Adjustable propeller blade configuration
Customized lifting bracket and cable arrangement
Control cabinet with VFD
Remote operating status monitoring
Water-temperature monitoring
Motor fault detection and early warning
Intelligent chip-based speed control
Customized nameplate, packaging and documentation
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