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21
2022
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11
What role does ultrafiltration membrane play in wastewater treatment?
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Water resources are becoming more and more important to human beings. As a non-renewable resource, we should cherish it more and more. Next, follow the small series, look at the application of ultrafiltration membrane and its role in sewage?
The amount of waste water produced by electricians is huge, which contains a large amount of heavy metals such as hexavalent chromium, copper, nickel, etc., with strong harmfulness and low biodegradability. Iron oxidation electrolysis is often used in actual work, but the iron oxidation method will produce a large amount of sludge, which needs further treatment: Although the electrolysis method can treat electrical wastewater well, the operating cost is high and it is not suitable for widespread promotion.
The combined use of ultrafiltration technology and reverse osmosis technology is considered to be an effective method for electrical wastewater treatment. Two membrane technologies are used to remove most of the heavy metals, organic carbon and nitrate in electroplating wastewater, and the use of ultrafiltration membranes also reduces the pollution of the permeable membrane and improves the service life.
The main sources of oily wastewater include crude oil spills, slaughterhouse wastewater and domestic wastewater. Its main components are floating oil, dispersed oil, emulsified oil and heavy oil. The commonly used oily wastewater treatment device is an oil trap, but it cannot process emulsified oil. Therefore, the shaft-assisted treatment usually adopts the air flotation method.
Because emulsified oil molecules are generally large, ultrafiltration membrane technology can be used to make oily wastewater pass through the ultrafiltration membrane under pressure, emulsified oil and other macromolecular pollutants will be intercepted, and the removal efficiency is high.
In summary, ultrafiltration membrane technology is an important technology for environmentally friendly water treatment, and has broad application and development prospects in urban sewage treatment, various industrial wastewater treatment and recovery of useful substances.
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