How does Hyde Ultrafiltration membrane carry out industrial water treatment?

Compared with the conventional drinking water advanced treatment process, the Hydenon ultrafiltration membrane process has the following advantages:

1. The filtration accuracy is extremely high, and it has a high removal rate for suspended solids, microorganisms and colloids.

2. The quality of the produced water is stable and less affected by the fluctuation of the influent water.

3. The modular device design not only meets the needs of large-scale water plants, but also is more suitable for small-scale decentralized water supply systems.

4. The process is short, and there is no need to add or add a small amount of chemicals, which is convenient for self-control.

Ultrafiltration membranes can intercept most of the suspended solids and colloids in water, but cannot remove dissolved small molecules, which hinders the application of ultrafiltration technology in drinking water treatment, but can be combined with other processes to solve the above problems.

The control and prevention of pollution of Hydro industrial nanofiltration membranes need to pay attention to the following two aspects:

1. Improve pretreatment

We all know that the quality of water supply is the premise of ensuring the desalination rate, water permeability and service life of the HEDENENA nanofiltration membrane device, so the raw water entering the membrane device must have good pretreatment, and reasonable pretreatment is very important for the long-term safe operation of the HEDENEN nanofiltration membrane device. With pretreatment that meets the requirements of influent water quality, it is possible:

1.Prevent contamination on the membrane surface, that is, prevent suspended impurities, microorganisms, colloidal substances, etc. from adhering to the membrane surface or fouling the water flow channel of the membrane element.

2.Prevents fouling on the membrane surface. During the operation of the device, due to the concentration of water, some insoluble salts are deposited on the surface of the membrane, so it is necessary to prevent the formation of these insoluble salts.

3.Ensure that the membrane is protected from mechanical and chemical damage so that the membrane has good performance and long enough service time.

2. Clean the Hydeneng nanofiltration membrane

Although the feed liquid has undergone various pretreatment measures, the surface of the film may also be deposited and scaled after long-term use, which will block the membrane pores and reduce the water production, so the polluted film should be cleaned regularly. Understand the characteristics of local water quality, perform chemical analysis of contaminants, and analyze the results to select cleaning agents and cleaning methods.

At present, the methods for controlling the pollution of the process of Heideneng industrial nanofiltration membrane can be roughly divided into the following four types:

1.Cleaning:The choice of cleaning method mainly depends on the configuration of the HEDENENA membrane, the type of membrane and the ability to resist chemical reagents, as well as the type of contaminants.

2.Change the nature of the material:Before membrane filtration, the material liquid is pretreated such as heat treatment, compounding agent (EDTA, etc.), activated carbon adsorption, pre-microfiltration and pre-ultrafiltration, etc., to remove some larger particles; It is also possible to adjust the pH away from the isoelectric point of the protein, thereby mitigating membrane fouling due to adsorption.

3.Change the way it works:Changing the mode of operation is actually improving the flow mode of the membrane surface, and the main methods are:

One is to adopt a certain operation strategy in the membrane process; The other is to optimize and improve the structural design of membrane modules and membrane systems. With these two methods, the flow of fluid through the membrane module can be ideally reduced from membrane fouling and concentration polarization.

Although membrane fouling is inevitable in the application of HEDENENER membranes, the degree of membrane fouling can be reduced by taking appropriate measures for different membrane fouling. For more information about Haide Neng's technical consultation, please consult Shuitianlan Environmental Protection.

Hyde ultrafiltration membrane is a membrane with very precise filtration performance so far, and it is precisely because of Hyde ultrafiltration membrane that the treated water can be purer. Hyde ultrafiltration membranes are very widely used and are now used in many fields, such as medicine, food, water treatment and other different fields, with good practical performance. So how should Hyde ultrafiltration membranes be maintained and flushed?

Let's take a closer look.

The maintenance of Hyde ultrafiltration membrane should exist from the moment the membrane is put into use, because regular cleaning and good maintenance of the membrane can maintain the good permeability of Hyde ultrafiltration membrane. In addition, the cleaning method will also be determined according to the nature of the membrane and the nature of the treatment liquid.

The maintenance of Hyde ultrafiltration membrane is actually very simple, and the physical cleaning is also very simple, for some detachable Hyde ultrafiltration membranes, the membrane pores are not particularly small, and they can be directly disassembled and wiped and rinsed with soft items under normal circumstances. Depending on the diameter of the membrane, special equipment can also be used for flushing, and the physical method can be reused.

Hyde ultrafiltration membranes should also be stored after use, and they will generally be stored in the protective solution, which can also effectively prevent the shrinkage of the membrane after dehydration, the destruction of the membrane, and the decrease of permeability. Preservation will also be divided into short-term storage and long-term storage, short-term storage is generally suspended after use, less than ten days to sterilize and sterilize the membrane, the membrane drain valve and regulating valve closed, to protect the performance of the membrane. Long-term storage means that after stopping use, more than 10 days, it must be sterilized and sterilized, and then sealed and stored.

The physical cleaning of Hydeneng ultrafiltration membranes mainly includes isobaric cleaning method, high-purity water circulation cleaning method and reverse cleaning.

1.Isobaric cleaning method:That is, close the ultrafiltration water valve, open the concentrated water outlet valve, and increase the flow rate to flush the membrane surface. This method can effectively remove a large number of soft impurities from the membrane surface.

2.High Purity Water Cleaning Method:As the purity of the water increases, the solubility increases. When cleaning the equipment, the loose dirt on the surface should be rinsed off with ultrafiltration membrane water, and then the pure water circulation cleaning should be carried out.

3.Backwash method:That is, the cleaning water enters and penetrates into the membrane through the ultrafiltration port of the membrane, and rushes to the side of the concentrator port.

The backwash method is effective in removing coverage, but special care should be taken during the backwash process to prevent overpressure to avoid membrane rupture or damage to the sealing surface.

1. Microbial contamination.

When the contaminant is bacteria or viruses, it can be cleaned with hydrogen peroxide at a concentration of 1 percent, and the Drammel ultrafiltration membrane can also be chemically cleaned with a 50ppm sodium hypochlorite solution.

2. Inorganic pollution.

When the contaminant is inorganic colloid, iron salt or calcium carbonate, hydrochloric acid, citric acid or oxalic acid solution can be used for cleaning, and the pH value should be controlled at about 2. When the contaminant is some insoluble inorganic salts such as calcium sulfate or barium sulfate, EDTA solution with a concentration of 1% can be used for cleaning.

3. Organic pollution.

When the contaminants are oil, starch, protein or polysaccharides, they can be cleaned with amylase, protease, etc. at a concentration. When the contaminants of Drammel ultrafiltration membranes are organic colloids, fats, or humic acids, they can be cleaned with a sodium hydroxide solution with a pH of 12. When the contaminants are grease substances or some organic substances that are difficult to clean, sodium dodecyl sulfate can be used for cleaning, and the concentration should be controlled at about that.

Hyde can clean ultrafiltration membranes by physical method.

Any equipment needs to be overhauled after a period of use, and the same is true for hollow fiber ultrafiltration equipment. The most important hollow fiber ultrafiltration membrane in the equipment will be constantly polluted and clogged by the impurities and pollutants it retains during the operation of the equipment, and the membrane element can be cleaned by physical methods to volatilize its properties. Physical cleaning mainly includes isobaric cleaning, cyclic cleaning and reverse cleaning.

Many people are very troublesome to physically clean supermodels.