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Design and Development of Non-Invasive Geo-physical Method based System for locating hidden septic tanks
Swaathi S, Pintu Kumar, Saran Raju, & Noor Mahammad Sk

Sponsored by FISST Pvt., Chennai

Click Here to See All the Experimental Data and Graphs

  1. Project Mentors:

    • Dr G Srikanth, Geo-Physicist
    • Dr G Manoj Reddy, Geo-Physicist
    • Dr C Mohanram, Geo-Physicist, FISST Pvt.,

  2. Objectives of the Research Project:

    3. The following are the major objectives of the work:

    • Development of simple and efficient data collection mechanism to identify the location and fill of the septic tank.
    • Develop an algorithm that identifies the dimensions of the septic tank.
    • Development of Simulation Model to design the algorithms for various earth conditions.
    • Construct the test beds to collect the realistic data for different earth conditions.
    • Validation of the proposed algorithm with varying earth conditions.
    • Identify the mechanism to estimate the sludge volume.
    • Identify the mechanism to detect and characterize the leakage.
    • Design and Development of the handheld system that can be operated by the users.

  3. Deliverables of the research Project:

    4. The following are the key deliverables of this research:

    1. A robust and simple mechanism to measure the resistivity of the earth.
    2. Software - Algorithm to measure the tank dimensions with the variable earth condition.
    3. Portable system - with simple operation mechanisms, such that anyone can use it.
    4. Resistivity Data for a tank with variable earth condition for further experimentation or future use.
    5. LiDAR or similar based non-invasive equipment.
    6. Product Design related Documents.
    7. Product usage manual.

  4. Design Methodology:

    5. Resistivity and Self-Potential based techniques to identify the location and the dimensions of the septic tank. Designed equipment can operate on the following techniques:

    1. Wenner Method
    2. Wenner-Schlumberger
    3. Dipole-Dipole
    4. Self-Potential

  5. Technical Specifications:

    6. Parameter Values
    Voltage Up to 35V
    Current 2A
    Power 120W
    Processing System Raspberry Pi 4
    Operating System Raspbian
    Pulse Duration 1s, 2s, 3s, 4s, 5s
    Channels 16
    Electrode Stainless Steel
    Max. Voltage 12V
    Protection Up to 35V
    Resolution 1mV
    Readings Current, Voltage
    Temparature up to 50C
    Data logging Cloud

  6. Overview of the Research Work:

  7. Demo Videos:

  8. Results and Discussions:

    1. Empty Tank using Wenner Method:


    2. Empty Tank using Dipole-Dipole Method:

    3. Full Tank using Wenner Method:

    4. 3/4 Filled Tank using Wenner Method:

    5. Half Tank using Wenner Method:

    6. Self-Potential Method:

    7. Leakage Detaction:

    8. Sludge Detaction:

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