In order to improve the construction, operation and management level of the artificial anti-seepage system of the sanitary landfill of domestic waste (hereinafter referred to as the landfill), timely discover and repair the high-density polyethylene (HDPE) geomembrane (hereinafter referred to as the geomembrane or anti-seepage system) in the anti-seepage system. Leakage and damage of seepage film) ensure its reliability and safety. Geomembrane testing is suitable for detecting broken holes in the anti-seepage geomembrane in the landfill area and leachate treatment facilities after the landfill is completed. Geomembrane testing is used to detect the leakage and pollution range of leachate during the operation of the landfill and after the landfill is closed. . In addition to relevant regulations, the detection of leakage and damage of the anti-seepage geomembrane of the landfill shall also comply with the current relevant national standards.

Geomembrane testing method:

The geomembrane detection test uses a high-voltage pulse power source, and applies voltage to the upper and lower sides of the geomembrane through the power electrode to fix the two power electrodes. A fixed electrode and a moving electrode are arranged in the detection area on the upper part of the geomembrane. The position of the fixed electrode remains unchanged, and the shape of the movable electrode is (1m ~ 5m) x (1m ~ 5m). Before detecting the predicted range, the welded joints within the inspection range are required to prevent the leakage caused by the current welded joints from affecting the detection of the surface of the high-density polyethylene film. During the measurement process, apply a high voltage pulse to the power electrode, measure the potential difference between the fixed electrode and the moving electrode, and record the potential difference until all measurement points are measured.

Geomembrane detection Due to the electrical insulation of the geomembrane, when the geomembrane is intact, no or only a small amount of current flows through the power supply circuit, and the potential difference is evenly distributed across the entire area. When there is a hole in the geomembrane, the insulation of the membrane at the hole location will be destroyed, and the current will pass through the hole, distorting the potential difference at this location. Therefore, the holes can be accurately positioned.