Author：Huamo Water treatment materials FROM：Water filter membrane manufacturer TIME：2021-11-30
Introduction: As everyone knows, in the recycling of wastewater, the wastewater contains oxidants, such as potassium permanganate solution, hexavalent chromium, or oxidized pesticide fungicides, such as sodium hypochlorite solution, in the pretreatment process. Control the environmental pollution of microbial strains. If this oxidizing chemical substance is not resolved and enters reverse osmosis system, the aromatic polyamide separation layer on the surface of reverse osmosis membrane cartridge will be separated, resulting in a significant reduction in membrane characteristics that cannot be repaired, specifically as salt removal rate Reduce and increase the water production rate. Generally, the front membrane elements are more susceptible to damage than other parts. Oxidation under the neutral or alkaline pH standard will damage the membrane more. reverse osmosis element membrane damaged by oxidation cannot be detected by mechanical equipment such as vacuum pump test. Such acid damage can be evaluated based on the staining agent of reverse osmosis element membrane or the small membrane specimens.
The anatomy of reverse osmosis element membrane and the analysis of the pulsation damper can be used to determine oxidative damage. Once the membrane element is oxidized and damaged, only replace all the damaged elements without other preventive measures.
(3) Use non-oxidizing bactericides such as isothialine or DBNPA.