Application of Ultrafiltration Membrane Technology in Water Treatment of Environmental Protection Projects

2022-04-21


  1. Purification of Urban Drinking Water

With the development of society, people have higher and higher requirements for the safety of drinking water, but at the same time, the pollution of urban water sources in city is becoming more and more serious, and the water quality of direct drinking water cannot meet the standard of drinking water, so it is necessary to purify urban drinking water. Urban drinking water mainly comes from groundwater and surface water, and the pollution mechanisms of the two water sources are different. But according to groundwater and surface water, the pollution mechanisms of the two water sources are different, but the pollutants are mainly asexual organisms, bacteria, fungi, viruses, suspended solids, etc. Traditional drinking water purification methods can achieve inactivation and purification of microorganisms and fungi, and purification of micron-sized suspended particles, while ultrafiltration membrane technology can also achieve effective removal of nano-sized particles on this basis. Therefore, the effluent quality is higher, which is of great significance to urban residents' drinking water health.

 

  1. Seawater Desalination

Non-renewable resources, fresh water resources available for human consumption on the earth are increasingly exhausted, and the shortage of water resources has become one of the most urgent problems facing contemporary human beings. Seawater desalination is considered to be an effective way to solve the drinking water crisis. At present, electrodialysis technology is widely studied in the world. Although electrodialysis is considered to be an effective method to desalinate seawater, its operating cost is high and its recovery rate is low. With the development of technology, ultrafiltration membrane technology has been used in anti-reflection seawater desalination. Its excellent separation performance and physical and chemical properties further improve the efficiency of Seawater Desalination RO System, and at the same time greatly reduce energy consumption.

 

  1. Treatment of Electroplating Wastewater

The waste water produced by electricity industry is huge, and it contains a lot of heavy metals such as hexavalent chromium, copper and nickel, which is extremely harmful and has very low biodegradability. In practical work, iron oxidation electrolysis is often used, etc., but iron oxidation will produce a lot of sludge, which needs further treatment. Although electrolysis can treat electricity waste water well, it has high operating cost and is not suitable for wide-scale popularization. The combination of ultrafiltration technology and reverse osmosis technology is considered to be an effective method for electric wastewater treatment. It can remove most heavy metals, organic carbon and nitrate from electroplating wastewater by using two kinds of membrane technology, and the use of Ultrafiltration Membrane also reduces the pollution of permeable membrane and prolongs its service life.

 

  1. Treatment of Oily Wastewater

The main sources of oily wastewater include crude oil leakage, slaughterhouse wastewater and domestic wastewater, etc. Its main components are floating oil, dispersed oil, emulsified oil and heavy oil, etc. The commonly used oily wastewater treatment device is an oil separation tank, but it can't treat emulsified oil, so it is often treated by air flotation. Because the emulsified oil molecules are generally large, the ultrafiltration membrane technology can be used to make the oily wastewater pass through the Ultrafiltration Membrane System under pressure, and the emulsified oil and other macromolecular pollutants will be intercepted, with high removal efficiency.

 

  1. Urban Sewage Reuse

The reuse of urban sewage is an important measure to relieve the pressure of urban water use. After the urban domestic sewage is treated to meet the reuse standard, it will be used in urban greening water and urban reclaimed water system. Ultrafiltration membrane technology can quickly treat urban sewage up to standard. Because urban sewage has good biodegradability, in practical work, in order to improve the effluent quality, CASS and ultrafiltration membrane technology are often used simultaneously. Under the condition of hydraulic action time of 12 hours, the removal rate of COD and ammonia nitrogen can reach over 86% and 90% respectively, and the pH value of the effluent is 7.25-7.89, which meets the standard of urban water reuse.

 

  1. Food Industry Wastewater Recovery

Ultrafiltration Membrane Manufacturer technology can not only improve the effluent quality, but also concentrate and recover a large number of useful solid substances. The most typical application is in the food industry. The waste water produced by food industry contains a lot of fat, protein, starch, yeast, etc. If these substances are discharged into the outside environment, they will not only cause environmental pollution, but also cause a lot of waste. Therefore, using ultrafiltration module technology to intercept the useful components in the waste water, and at the same time, BOD and COD in the water are separated from the water, and the separated peripheral substances can be extracted and recovered, which can bring great economic benefits to enterprises.