Septic Tanks

Our sanitation product is focused on eliminating manual scavenging by cleaning septic tanks without any manual intervention


The HomoSEP robot can homogenise the bottom hard sludge of deep septic tanks and pump the tank slurry using an integrated suction mechanism. This robot aids humans in cleaning sludge without entering potentially hazardous environment.

HomoSEP deep tech capabilities are
  • Homogenise hard sludge particles from septic tanks at depths of 5-7 metres.
  • Penetration inside the viscous material to create a pumpable slurry with particle sizes ranging from 40 to 50 mm.
  • Handheld operation by semi automatic controller with minimum human interaction inside hazardous environment.
  • User-friendly and easy to maintain and service.

  • Deposited Septic tank sludge (5-7 m deep) homogenization, cleaning, & sterlization via mobile robotics technology.
  • Penetration & Softening of hard sludge at high depths.
  • Pumping of slurry outside the deep tanks.
  • Quantification of homogenized slurry.
  • Sterlization of robot from septic tank contents.
  • No human entry inside the manhole.


  • Robot weight :250-300 kg
  • Power 3 HP, Torque 250 Nm, RPM 40-60
  • 4.3-inch HD foldable dashboard screen
  • LED night vision with waterproof camera
  • Toxic gas detection sensors an
  • Automatic folding mechanism
  • Organisation name : Indian Insitute of Technology, Madras
  • Location : Near CCW Office
  • Objective : Homogenise the hard sludge present in the bottom of the septic tank and inspect the condition of the walls of septic tank.
  • Results :       Homogenised the sludge for 25 minutes at a speed of 65 rpm and had satisfactory results. Investigated the walls using our IR Camera and discovered that there is no wall break inside the tank.

What we intend to do?

To homogenise the hard sludge deposited in the tank's bottom using our bottom module, and to check the septic walls and identify harmful gas using sensors.

What we have done?

The cleaning was done to homogenise the sludge and assess the condition of the septic tank's inside walls. The sludge at the bottom of the tank was revealed to be quite hard, and we were able to homogenise it within 25 minutes of working. We also examined the walls of septic tanks and found no serious damage.

Our procedure:

Opened the septic tank 30 minutes before testing. Meanwhile, our team has double-checked all electrical connections and made certain that all mechanical parts are properly attached. We also lubricated the blade after the testing to make cleaning smoother.

The tractor was then parked near to the tank's opening, and the portable hydraulic cylinder system was carefully lowered.

After the feeding system was centred, we used the actuators built into it to gradually enable the blades to enter.

After everything was in order, we gradually increased the rpm of the blades to maximum for the first two minutes, checking for any obstructions such as tree roots or plastics getting caught.

We gradually increased the speed of the blades to maximum, and much of the tank content was homogenized after about 15-20 minutes.