Application and principle of MBR hollow fiber curtain membrane in advanced treatment of domestic sewage

Release Date:

2024-03-28

Source:


MBR (membrane bioreactor) technology occupies an important position in the field of sewage treatment, especially the hollow fiber curtain membrane technology, which successfully realizes the deep purification of domestic sewage with its unique working mechanism and excellent treatment effect. The application of MBR hollow fiber curtain membrane in the treatment of domestic sewage not only greatly improves the effluent quality, but also optimizes the treatment process, showing its great value in resource conservation and environmental protection.

Daltonen mbr membrane

MBR hollow fiber curtain film, as the name suggests, is a film component composed of numerous hollow fiber filaments orderly arranged in the form of curtain. Each hollow fiber is hollow inside and covered with a layer of semi-permeable membrane material with micropores, which are usually between 0.01 and 0.4 microns in diameter, with excellent screening and separation functions.

In the treatment of domestic sewage, first of all, the sewage enters the bioreactor loaded with activated sludge. In this environment, microbial communities use biodegradation processes to convert organic matter such as proteins, fats, and carbohydrates from sewage into microorganisms, carbon dioxide, and water. This stage greatly reduces the organic load in sewage.

Subsequently, the sewage flows to the hollow fiber curtain membrane module area. Membrane components play a decisive role here, and their microporous structure can effectively trap microorganisms, suspended particles, colloidal substances in activated sludge and sewage, preventing them from flowing out with the water, a step that ensures high transparency and low suspended solids content of the effluent. At the same time, the membrane components also play a good role in the interception of some macromolecular organic compounds that are difficult to biodegrade, so as to achieve the in-depth treatment of domestic sewage.

In addition, another advantage of the MBR hollow fiber curtain membrane is its efficient control of the biological phase. Due to the limiting effect of membrane separation, a high concentration of microorganisms can be maintained in the reactor, thus improving the biodegradation rate and treatment effect, especially the removal efficiency of nutrients such as nitrogen and phosphorus. Moreover, the separation of the membrane allows the sludge age to be controlled flexibly, avoiding the problem of sludge swelling in the traditional process.

During operation, microbial adhesion and clogging on the membrane surface can be prevented by continuous aeration, while maintaining biological activity. When necessary, the backwashing method is used to clean the membrane surface to ensure the stability of the membrane flux and extend the service life of the membrane.

All in all, MBR hollow fiber curtain membrane technology plays a key role in the in-depth treatment of domestic sewage. With its efficient separation performance, stable treatment effect and compact spatial layout, it realizes the resource utilization of sewage and strict effluent standards, providing a strong technical support for the sewage treatment industry in China and even in the world. It has vigorously promoted the construction of green, low-carbon, circular and sustainable ecological civilization.

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