

A wastewater sludge removal robot is a remote-controlled machine designed to remove settled sludge, sediment, and other accumulated solids from wastewater tanks without requiring workers to enter the tank.
Instead of draining a tank or relying entirely on manual cleaning, the robot can move through the tank, break up accumulated sludge, add water when necessary, and pump the resulting slurry to a designated discharge point.
With different robot sizes, pumping capacities, and cleaning configurations available, the system can be adapted to wastewater tanks with limited access, thick sludge, long pumping distances, or other challenging cleaning conditions. For broader wastewater treatment plant desilting applications, see our wastewater treatment plant desilting robot.
What Is a Wastewater Sludge Removal Robot?
A wastewater sludge removal robot combines a crawler platform, sludge-breaking equipment, water jetting, and a transfer pump into one remote-controlled cleaning system.
It is designed for applications where sludge accumulates at the bottom of wastewater or treatment tanks and conventional pumping cannot efficiently remove the material.
The robot can be configured according to:
- Tank access width and height
- Sludge thickness and concentration
- Tank depth and dimensions
- Sludge particle size
- Required pumping capacity
- Pumping distance and elevation
- Available power supply
This makes it suitable for different wastewater tank sludge removal requirements rather than relying on one fixed machine configuration.The system is based on a remote-controlled dredging robot designed for sludge breaking and pumping in challenging wet environments.


What Types of Wastewater Sludge Can It Remove?
The robot is primarily designed for accumulated sludge and sediment that can be broken up and converted into pumpable slurry.
Typical materials include:
- Settled wastewater sludge
- Thick sludge deposits
- Sediment mixed with wastewater
- Sludge containing sand or small solid particles
- Compacted deposits at the bottom of tanks
When sludge is too thick or compacted for direct pumping, the cleaning process can be adjusted to improve pumpability.
The actual configuration depends on the sludge properties, including thickness, concentration, particle size, and how strongly it has settled or compacted.
How Does a Wastewater Sludge Removal Robot Work?
The basic cleaning process follows three steps:
1. Break
A cutting head, auger, or other sludge-breaking device loosens accumulated sludge and compacted deposits.
This helps separate dense material from the tank bottom before pumping.
2. Dilute
If the sludge is too thick to pump efficiently, water can be added through the robot’s water-jet system.
The objective is to create a more pumpable slurry rather than attempting to pump highly compacted sludge directly.
3. Pump
A hydraulic transfer pump moves the resulting sludge-water mixture through the discharge pipeline to the designated collection or treatment point.
This break → dilute → pump process allows the robot to handle sludge conditions that may be difficult for a conventional pump alone.

Key Features of the Wastewater Sludge Removal Robot
Remote-Controlled Operation
The operator controls the robot from outside the tank. This reduces the need for personnel to enter areas containing accumulated sludge or wastewater.
Compact Crawler Design
The crawler platform allows the robot to move across the tank bottom while maintaining traction in wet and muddy conditions.
Different machine sizes can be selected according to the available tank access.
Sludge Breaking and Water Jetting
A combination of mechanical sludge breaking and high-pressure water jetting helps loosen compacted deposits and prepare them for pumping.
Powerful Sludge Pumping
The transfer pump is selected according to sludge concentration, pumping distance, required capacity, and site conditions.
For example, the YG series can be configured with pumping capacities from compact-tank applications up to approximately 250 m³/h, depending on the model and working conditions.
Remote Monitoring
A camera and lighting system can help the operator observe the working area while controlling the robot remotely.
This is particularly useful when visibility inside the tank is limited.
Wastewater Sludge Removal Robot Models
| Parameter | YG450 | YG500 | YG600 | YG700 | YG800 | YG900 | YG1200 |
| Robot Dimensions (mm) | ≤1700 × 450 × 450 | 1500 × 500 × 650 | 1500 × 600 × 650 | 1600 × 700 × 650 | 1600 × 850 × 700 | 1650 × 960 × 750 | 1900 × 1200 × 750 |
| Applicable Manhole / Access | ≥600 mm opening | ≥600 mm opening | ≥600 mm opening | ≥700 mm opening | ≥800 mm opening | ≥900 mm opening | Large culvert / open access |
| Dredging Width (mm) | 450 | 500 | 600 | 700 | 800 | 900 | Suitable for large culverts |
| Travel Speed (m/s) | 3–12 | 3–15 | 3–15 | 3–15 | 3–15 | 3–15 | 0–17 m/min |
| Pump Diameter (inch) | 3 | 3 | 3 | 4 | 4 | 4 | 4 or 6 |
| Pump Flow (m³/h) | 50 | 100 | 100 | 160 | 160 | 200 | 250 |
| Pump Head (m) | 0-30 | 0–30 | 0–30 | 0–25 | 0–25 | 0–25 | 0–30 (Horizontal: 100–150 m) |
| Hydraulic Station Dimensions (mm) | 2000 × 1100 × 1500 (recommended) | 2200 × 1200 × 1700 | 2200 × 1200 × 1700 | 2200 × 1200 × 1700 | 2200 × 1200 × 1700 | 2200 × 1200 × 1700 | 2120 × 1240 × 1200 |
| Main Motor Power (kW) | 11–15 kW | 18 | 18 | 22 | 22 | 22 | 45 kW (50 kW) / Diesel 76 kW (123 kW) |
| Hydraulic System Pressure (MPa) | 0–16 | 0–16 | 0–16 | 0–16 | 0–16 | 0–16 | Custom / high-pressure system |
| Particle Size Capacity (mm) | ≤10–20 mm (soft sludge) | 15 | 15 | 40 | 40 | 50 | 0–40 (customizable) |
| Winch Speed (r/min) | 0–10 | 0–10 | 0–10 | 0–10 | 0–10 | 0–10 | 0–10 |
| Pipe Length (m) | 20–30 optional | 30–50 optional | 30–50 optional | 30–50 optional | 30–50 optional | 30–50 optional | 30 m/pack, high-pressure resistant |
| Control System | Wireless Remote Control | Wireless Remote | Wireless Remote | Wireless Remote | Wireless Remote | Wireless Remote | Wireless Remote |
| Lighting System | Underwater LED ×2 | Underwater LED ×2 | Underwater LED ×2 | Underwater LED ×2 | Underwater LED ×2 | Underwater LED ×2 | Underwater LED ×2 |
Different tank conditions require different robot sizes and pumping configurations.
| YG450 | Compact wastewater tanks and restricted-access areas | Small access requirements and flexible operation |
| YG900 | Medium to large tanks with heavier sludge | Higher cleaning and pumping capability |
| YG1200 | Large-scale sludge removal applications | High-capacity pumping, up to approximately 250 m³/h depending on configuration |
Model selection should not be based on tank volume alone. Access size, sludge properties, pumping distance, and required cleaning capacity should also be considered.


How to Choose and Customize a Wastewater Sludge Removal Robot
The right wastewater sludge removal robot depends on the tank and sludge conditions. Key factors include:
- Tank access: Opening size and available entry space
- Sludge condition: Thickness, concentration, and particle size
- Tank dimensions: Length, width, and depth
- Pumping requirements: Distance, discharge height, and required capacity
- Power supply: Electric or diesel
Based on these conditions, the robot can be customized with the appropriate robot size, sludge-breaking head, high-pressure water jet, transfer pump, discharge pipeline, and power system.
Provide the tank dimensions, access size, sludge condition, and pumping requirements to determine the suitable YG450, YG900, or YG1200 configuration.
Where Can a Wastewater Sludge Removal Robot Be Used?
The robot is designed for wastewater-related tank cleaning applications where sludge accumulates and direct manual access is undesirable.
Typical applications include:
- Wastewater treatment tanks
- Sedimentation and settling tanks
- Sludge collection areas
- Industrial wastewater tanks
- Process wastewater tanks
- Other enclosed or partially enclosed wastewater tanks
The exact robot configuration can be adjusted according to tank structure and sludge conditions.
FAQ about Wastewater Sludge Removal Robot
What is a wastewater sludge removal robot?
It is a remote-controlled crawler machine designed to break up and pump accumulated sludge from wastewater tanks without requiring operators to enter the tank.
Can the robot remove thick sludge?
Yes. Thick or compacted sludge can be mechanically broken and diluted with water before pumping. The appropriate configuration depends on sludge thickness and concentration.
Can it pump sludge over a long distance?
The pumping distance depends on the pump configuration, pipeline diameter, elevation, and sludge characteristics. These parameters should be confirmed before selecting the pump.
What tank access size is required?
The required access size depends on the selected robot model. Compact models such as the YG450 are designed for more restricted entrances.
Which model should I choose: YG450, YG900, or YG1200?
The choice depends on tank access, sludge condition, required capacity, tank dimensions, and pumping distance. A larger model is not necessarily required simply because the tank is large.
Can the wastewater sludge removal robot be customized?
Yes. Robot dimensions, pump capacity, sludge-breaking equipment, water-jet system, pipeline length, power system, and other components can be configured according to the project.
Get a Wastewater Sludge Removal Robot for Your Tank
Choosing the right wastewater sludge removal robot starts with understanding the actual tank and sludge conditions.
If you provide the tank dimensions, access opening, sludge thickness, sludge concentration, particle size, pumping distance, discharge height, and power supply, the appropriate robot model and cleaning configuration can be determined for your application.
The result is a wastewater tank sludge removal system designed around the actual cleaning conditions rather than a standard machine configuration.












