Application of HDPE Geomembrane in Wastewater Treatment

　　HDPE geomembrane is a waterproof structure composed of HDPE locking strips, HDPE geomembrane, and geotextile, with two fabrics and one membrane. It is laid on the slope of the bottom of the water tank and is a waterproof structure that replaces the fully reinforced concrete self waterproof structure.

　　In the application example of the sewage treatment plant in the Tumurtai fur and plush meat processing industrial park, this process not only meets the standards of the "Code for Construction Acceptance of Water Supply and Drainage Structures" (GB50141-2008), but also meets the requirements of process operation. At the same time, it saves investment and shortens the construction period.

　　HDPE geomembrane has been successfully used as a waterproof structural layer in sewage treatment engineering, with simple construction and low cost. Compared with reinforced concrete, this process not only shortens the construction period but also reduces investment, making it a very worthwhile construction process to promote in the construction of sewage treatment projects.

　　Construction of HDPE geomembrane laying:

　　(1) Construction conditions: Requirements for the base surface: The moisture content of the plain soil to be laid should be below 15%, and the surface should be flat and smooth, without water accumulation, mud, bricks, stones, sharp edges, and other hard impurities. Branches, weeds, and garbage should be cleaned up.

　　Material requirements: The quality certification documents of HDPE geomembrane materials should be complete, and the appearance of HDPE geomembrane should be intact and undamaged; Mechanical damage, production trauma, holes, folds and other defects should be removed and reported to the supervising engineer for approval before construction.

　　(2) Construction of HDPE geomembrane: First, lay a layer of geotextile as a protective layer, and the geotextile should be fully laid within the laying range of the anti-seepage membrane. The overlapping length should be ≥ 150mm, and then lay the anti-seepage membrane.

　　The construction process of the anti-seepage membrane is as follows: laying, cutting, aligning, aligning, pressing, welding, shaping, testing, repairing, retesting, and acceptance.