The anti-seepage treatment of the sewage tank is very important for the normal operation of it. Therefore, it is necessary to carefully select the geomembrane, strictly control the technological measures for the construction of the geomembrane, and strictly control the inspection process, so as to achieve the purpose of anti-seepage. Based on this, this article analyzes the anti-seepage treatment of large sewage tanks. First, the important characteristics of sewage tanks are briefly described, and the main factors of seepage in sewage tanks and anti-seepage treatment are briefly analyzed.

The use of geomembrane anti-seepage technology in sewage tank is one of the anti-seepage technologies in hydraulic engineering, and it is also a widely used anti-seepage method. It has the advantages of low cost of anti-seepage technology and good anti-seepage effect. Geomembrane anti-seepage technology is mostly selected for small, short distance water conservancy projects. The other is adopt concrete anti-seepage technology, which is characterized by anti-seepage construction technology, and the anti-seepage effect is obvious, but its construction cost is much higher than the previous one. It mainly uses cement, lime, aggregate and other concrete to strengthen the bottom and sides of the sewage tank channel.

The sewage treatment tank mainly contains alkaline, acidic and other harmful substances, which will change during the water treatment process, so the requirements for anti-seepage are relatively high. Our sewage tank geomembranes are chemically stable and used in sewage treatment, chemical reaction tanks, landfills. It is resistant to high and low temperature, asphalt, oil, acid, alkali, salt and other 80 kinds of strong acid and alkali chemical media, and has good anti-seepage performance.The use of geomembrane as the inner lining of the sewage treatment tank is low in cost, and has a remarkable anti-corrosion and anti-seepage effect.