Which is the best MBR flat membrane to choose What are the specifications of MBR membrane?

Singapore Meineng:

Singapore Meineng Material Technology Co., Ltd. is a high-tech company specializing in the research, development and manufacturing of hollow fiber membranes and their application products, with years of R&D experience and technology accumulation in Meineng Research Center and manufacturing bases in Guangzhou and Mianyang, China, Meineng has become one of the few manufacturers of high-efficiency PVDF hollow fiber membranes in the world.

With the support of the Singapore Economic Development Board (EDB), Meineng has established two research centers in Singapore and China. The company's intellectual property rights include a number of technology and invention patents that have been and are being approved, as well as proprietary technologies in product design and manufacturing. Meineng is committed to the research and development of high-performance, high-throughput, anti-pollution, low-energy hollow fiber membranes and industrial and civil water treatment and purification equipment.

Singapore Meineng brand MBR membrane.

Mitsubishi Japan: Mitsubishi Chemical Corporation is an integrated company formed by the merger of Mitsubishi Chemical Corporation and Mitsubishi Oil Chemical**** on October 1, 1994. Mitsubishi Chemical's sales are the largest in the Japanese chemical industry.

Mitsubishi Chemical Corporation is the largest chemical company in Japan. The Company offers its wide range of products through its three main segments: Functional Materials and Plastics Products (including Information & Electronics, Specialty Chemicals, Pharmaceuticals); petrochemical industry; Carbon and agricultural products.

Although functional materials such as aluminum, flake plastic products, and plastic packaging account for more than 55% of sales, the company has set long-term goals on specialty chemicals and pharmaceuticals. Mitsubishi Chemical is in the process of restructuring and managing reforms to make it profitable.

Japanese Mitsubishi brand MBR membrane.

Kubota, Japan:

Kubota Corporation is one of the largest water treatment equipment manufacturers in Japan, founded in 1890 and headquartered in Osaka. The main water treatment equipment produced includes pumps, valves, grids, dehydrators, various water supply and drainage pipelines, membrane bioreactors (MBR), etc. Currently, Kubota has processing plants, offices and sales organizations in 130 countries around the world.

Kubota is also the world's largest manufacturer of agricultural machinery, and the membrane bioreactor of Kubota, a manufacturer of diesel engines, was invented in 1980 and a commercial wastewater treatment plant was first established in Japan in 1990. So far, there are 2,200 municipal and industrial wastewater users around the world. PORLOCK, Kubota's most famous customer in the UK, has been in continuous operation for 9 years now and has become a model for successful MBR operation in the world.

Japanese Kubota brand MBR membrane.

Toray, Japan: Toray was founded in 1926 and is headquartered in Tokyo, Japan. Toray Group is a world-renowned high-tech multinational enterprise with organic synthesis, polymer chemistry and biochemistry as its core technologies.

Toray is one of the first companies in the world to engage in the development of MBR membrane technology, as early as the 60s of the twentieth century, began the research of membrane technology, from the selection of raw materials, the development of membrane technology, and the design of membrane element structure, etc., to make outstanding contributions to the application and development of this technology in the field of ultrapure water, seawater desalination and other water treatment fields.

The domestic Jiangsu blue sky Peier film is OK, with curtain film is more, flat film manufacturers are said to be relatively large.

I still recommend you to choose 3M theirs, this is still one of the best ones, good.

We are also doing hollow film, the warranty period is more than 2 years, or not easy to break, domestic flat film can try Meifute, in the country their strength is very strong.

Bishuiyuan, Ruijiet can be.

Which one of the flat films of this brand is good can be browsed on the ** Internet, which one has high sales and good evaluation, and his quality is good.

The so-called proficiency, you can imagine that we do the first grade of primary school calculation problems, each of which is actually very simple for us. But when we complete 1000 questions in a timed situation, it is not necessarily all right.

I think you can choose some of the higher rankings, generally speaking, the quality is better.

Membrane is only used by Chinese people, and there are people abroad who use it.

In China, Drandmere focuses on providing high-quality membrane products and membrane technology application solutions, and strives to promote the concept of sustainable development in various industries, achieve continuous increase in social value, and aspire to contribute to the global sustainable development goals.

MBR is an efficient wastewater treatment technology that combines biochemical sludge technology with membrane separation technology. The pressure drive mode is used to replace the traditional gravity action through the membrane element to achieve the effect of slurry separation.

There are two kinds of common MBR membrane modules: curtain MBR membrane modules and plate MBR membrane modules, because different manufacturers will mark the product models and specifications according to their own conditions, resulting in a lot of MBR membrane module models and specifications on the market. In the procurement, since most of the formulation of model specifications is an enterprise behavior and is not standardized, it is of little significance to determine the MBR membrane module based on the model alone in the actual selection.

According to the conventional model, combined with the actual situation of membrane material, membrane area (m), treated water quality, treated water volume, etc., various types of MBR membrane modules can be selected.

MBR membrane specifications are generally calculated according to the membrane area, and the general conventional specifications are 10 square meters, 15 square meters, 20 square meters, 25 square meters, etc.

Specification size chart.

Specification structure diagram.

Treatment system for MBR membrane process.

The MBR sewage treatment system usually consists of three parts: a regulating tank, a biological aeration tank and a clean water tank.

The sewage removes large particles of impurities through the grid, enters the regulating tank, and enters the aerobic reaction pool by the sewage lifting pump to remove ammonia oxygen (when the ammonia content in the sewage is high, it is recommended to use the facultative oxygen reaction tank), and then enters the membrane biological aeration tank, in the membrane bioreactor, the organic pollutants in the sewage are degraded by microorganisms to generate water that meets the COD standard, and then the water treated by the separation membrane with a large number of micropores on the surface is separated from the microorganisms in the pool.

In addition to being reused, the reclaimed water in the reclaimed water pool is also used for the backwashing of membrane modules, in order to prevent the growth of algae and bacteria, a small amount of chemicals should be put into the reclaimed water pool regularly.

In the field of sewage treatment and water resource reuse, MBR, also known as membrane bioreactor, is a new water treatment technology that combines a membrane separation unit and a biological treatment unit. The biggest change of MBR compared with the traditional activated sludge method is that the secondary sedimentation tank is removed and the membrane tank is added. The original biochemical treatment part of the pool can also function as a secondary sedimentation tank.

PS: The secondary sedimentation tank is to separate the mud and water by gravity. In this link, various emergencies may occur, such as sludge floating, black lumpy sludge on the pool surface, scum, foam, etc.

The membrane used in the MBR process has the same function as a conventional secondary sedimentation tank, which is to separate solids and liquids. The advantage of the membrane is that the separation is more thorough, so the effluent quality is more guaranteed.

If you want to choose a membrane, I suggest that you can choose Lisheng, focusing on water treatment scientific research for 29 years, membrane technology, rich cases.

The use and scope of application of MBR flat sheet membrane.

UsesThe original sewage treatment system was expanded, upgraded and transformed.

Municipal sewage treatment system was newly constructed.

Reclaimed water reuse. Scope: Domestic sewage treatment and reclaimed water reuse for new rural construction.

Domestic sewage and new water reuse in industrial and mining enterprises, rural areas, outposts, tourist attractions, etc.

Industrial wastewater treatment similar to domestic sewage.

Areas subject to site constraints and water scarcity.

Effluent water quality: better than the national sewage discharge level A standard, can be used for green irrigation, car washing, road dust reduction and washing, toilet flushing, fire fighting, landscape supplementary water and other non-potable water places.

Application areas of MBR flat sheet membranes:1.Drinking water treatment.

With flat membranes, microorganisms, rust, etc. can be removed from drinking water very conveniently.

2.Surface water treatment.

Flat membranes can be applied to surface water treatment to prepare purified water.

3.Sewage treatment.

Municipal and industrial wastewater can be treated with MBR membranes and can be used as reuse water or even as drinking water after further treatment.

4.Desalination pretreatment.

MBR membranes can control the water quality of seawater, provide high-quality pretreatment for reverse osmosis systems, and ensure the stable operation of reverse osmosis systems.

5.Other areas of application.

MBR membranes can also be used in many other areas, such as replacing traditional sand or cartridge filtration; Reclaimed water reuse. direct drinking water system; Replace conventional treatments such as coagulation and sedimentation sand filtration; deturbidity, sterilization and purification of water for food, biology and pharmaceutical industries; Juice beverage processing and wine deturbidity; Turbidity removal and refining of traditional Chinese medicine extract; Electrophoretic paint**; Latex **; domestic sewage treatment; Protein in whey; extraction of enzymes; gelatin concentration; Protein**, etc.

Features of flat membranes:High resistance to fouling.

No backwash is required.

There is no need for offline cleaning.

The operation is simple and the stability is good.

There is no possibility of leakage due to broken wires.

Less pressure loss (gravity can be used for operation).

Higher throughput.

Easy to maintain. Less chemical cleaning (effective cleaning with air).

Physical diagram of flat membrane.

Flat membrane material:The membrane material is polyvinylidene fluoride (PVDF).

PET non-woven fabric as the base layer.

High chemical stability.

Compared to hollow fiber membranes, they have high stain resistance (less chemical cleaning, easy maintenance) and high physical strength.

Hollow fiber curtain membrane is cheaper, but if there are more impurities in the membrane pool, it will cause the winding of membrane filaments and mud accumulation, which will affect the use effect, and the effect of using flat membrane is better in this case.

Let's start with the advantages.

1.The pretreated fine grid of flat membranes can be relaxed to 3 mm, while the hollow fiber is generally 1 mm.

2.The service life of the flat film is relatively long, and one piece is replaced when it is broken.

3.The flat membrane has good anti-fouling resistance, and contaminants are not easy to be deposited on the surface of the membrane.

4.The hollow membrane needs to be backwashed every 10-15min, and the flat membrane is not used.

5.The hollow fiber membrane is chemically cleaned once a week, and the flat membrane is once every 3-6months.

6.Hollow fiber membranes need to be cleaned offline every 6-12months, flat membranes are not required.

7.Flat sheets have higher physical strength than hollow fiber membranes.

8.Flat membranes have a higher flux than hollow fibers.

This is the advantage I summarized, the cost is the disadvantage of the flat membrane, about 40% higher than the cost of the hollow fiber membrane (of course, there is a difference between domestic and imported **, not absolute) The operating cost can be seen from the above It is mainly reflected in the medicine and energy consumption, and the cost of replacement depends on the use and quality of the membrane

Another point is that the domestic market share of flat membranes is relatively low compared to hollow membranes

There are differences, the membrane pollution cleaning method is different, the hollow is generally equipped with a backwash pump, while the flat plate is not, and the specific others are similar.

In terms of cost, the flat plate is more expensive than the hollow, and there is no industry standard for MBR in China, the market is chaotic, and there is no guarantee in quality. The membrane ** abroad is particularly high.

There are many problems in the later operation, and I have not seen a case of large-scale successful operation in China, sludge control, membrane cleaning is very troublesome. In general, there will not be many problems in the first 1 year of operation, and many problems will arise over time. In short, MBR has high requirements for the professionalism of membrane manufacturers, the rationality of process structure design and the quality of operators!

In China, most of the hollow fibers and flat membranes are commonly used. Especially in foreign countries, the use of flat membranes is more common. The hollow membrane is lower than the flat membrane, but the shortcomings are also easy to see, easy to break the filament, the later operation is very troublesome, not only the cost is higher, the frequency of backwashing and medicated washing is also high, so its service life is generally not high, the general service life of the hollow is 2-3 years, and the flat membrane can be maintained at 5-7 years.

In addition, the sludge concentration range corresponding to the hollow is 4000-8000mg L, and the flat membrane can reach 8000-10000mg L. For the later replacement, the flat film has obvious advantages, the hollow broken wire reaches 20%, and the flat film only needs to be replaced.

Compared with the conventional reclaimed water reuse technology, the MBR process has the outstanding advantages of less footprint, high degree of automation, and excellent and stable effluent quality.

The research on membrane bioreactors in China is still in its infancy, but it is developing rapidly. The study of MBR in our country began.

1993 year. The investigators have a review of the isolated MBR

Comparative studies have been carried out on suction submerged MBR, gravity submerged MBR and traditional biological treatment processes in urban sewage treatment.

The effluent quality of all MBRs is better than that of traditional biological treatment processes.

According to the development history and status quo of the above-mentioned technologies, the progress of reclaimed water reuse technology at home and abroad is compared as follows:

The time when the country began to reuse the water from the polluted water.

Roll out apps at scale.

The initial research time and application status of MBR technology.

Japan 1962.

90s. It has been widely used in the 80s.

USA 1960.

70s. It has been widely used in the 60s.

China 1982.

1995 year.

The research began in 1993 and has been widely applied.

It can be seen that the gap between China and the world's advanced level in the field of reclaimed water treatment technology is 15-20 years, and the United States, needless to say, even Japan, a close neighbor in Asia, has also left us far behind. Therefore, we should give full play to our resource advantages and increase the intensity of technological research and development, so as to shorten the gap with the world's advanced level and develop and expand our water treatment industry.

Introduction to the MBR process.

Membrane bioreactor (membranebio

Reactor, abbreviated as MBR) refers to a new wastewater treatment system that combines ultrafiltration components in membrane separation technology with bioreactors in wastewater treatment. It uses a membrane treatment unit instead of a secondary sedimentation tank, and the ultrafiltration membrane traps the sludge and macromolecular pollutants in the reactor, which not only improves the microbial concentration of the system, but also enables the macromolecular pollutants to obtain a longer residence time. It greatly improves the oxidation rate of organic matter by microorganisms, so the treated effluent is of good quality, and the system produces less sludge, and there is almost no need to discharge sludge.

A typical MBR process flow is:

Raw water, grid, conditioning tank, hydrolysis tank, MBR tank, disinfection, effluent reuse.