Sewage treatment plant why use impermeable membrane?

Anti-seepage membrane generally use HDPE geomembrane, the current pool of sewage treatment plants usually use reinforced concrete and soil pool structure type, but these structural types exist in the high cost of engineering, construction process is complex, long construction period, easy to crack and other defects, especially when applied to some of the larger pool (such as regulating pools, aeration tanks), these defects are more prominent. At the same time, the soil pool structure type of its own seepage control performance is poor, and HDPE geomembrane has good seepage control performance, just to make up for this defect. Moreover, HDPE geomembrane has the advantages of low cost, good seepage resistance, good chemical stability, good UV aging resistance and resistance to rodent and microbial infestation, and at the same time to avoid the risk of leakage, suitable for a variety of types of sewage ponds with a simple body shape.

HDPE geomembrane is a geomembrane with a density greater than 0.94 g/cm3 produced from high (medium) density polyethylene resin. It contains about 97.5% polyethylene, 2.5% carbon black and trace amounts of antioxidants and heat stabilizers.

HDPE geomembrane has the following advantages:

1) High strength.

2) Good ductility: better surface suitability and weather resistance.

3) good impermeability: permeability coefficient is less than 1 × 10-13 cm/s.

4) good chemical stability: HDPE softening point of about 121 ℃, the cold embrittlement point of about -120 ℃, inorganic acids, organic acids, inorganic salts, alcohols, aldehydes, amines, esters, oil and grease, etc., have strong resistance, in the sewage environment, the working life of up to 50 years or more.

Good resistance to ultraviolet aging: the carbon black added in the formula of HDPE geomembrane has the ability to resist ultraviolet light.

Resistance to rodent and microbial attack: Various tests have proved that animals and microbes attack only those polymers containing plasticizers, and HDPE geomembranes are generally not attacked by these organisms due to the absence of added plasticizers.

Tai'an Zhongqi Building Materials produces HDPE geomembranes