Application and advantages of MBR membrane technology in dairy wastewater treatment

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As an important branch of food manufacturing industry, dairy industry has a wide influence on the world. However, with the scale and intensification of dairy production, the resulting wastewater problem has become increasingly prominent, such wastewater is usually rich in lactose, protein, fat, minerals, detergent residues and microorganisms and other components, if not properly treated directly discharged, will have a serious impact on the environment. In recent years, MBR (membrane bioreactor) technology has been widely used in the field of dairy wastewater treatment because of its unique advantages.


MBR membrane

MBR technology is a new wastewater treatment technology which combines traditional biological treatment technology and membrane separation technology. In the process of treating dairy wastewater, first of all, the wastewater enters the bioreactor, where the microbial community will biodegrade the organic matter in the wastewater through metabolism, and effectively transform protein, fat and other macromolecular organic matter into microbial body and small molecular matter. Then, through the microfiltration or ultrafiltration membrane components embedded in the bioreactor, the efficient interception of microbial floc and not fully degraded organic matter is achieved, thus achieving solid-liquid separation.

The application of MBR technology to treat dairy wastewater has many advantages:

High efficiency purification capacity: MBR membrane has a very high separation efficiency, can effectively intercept most of the suspended solids and microorganisms, making the water clear, and various indicators such as COD (chemical oxygen demand), BOD (biochemical oxygen demand) and turbidity can meet high standards.

High space utilization: Compared with the traditional activated sludge method, MBR technology greatly reduces the footprint of the equipment due to the compact membrane component design, which ADAPTS to the tight land needs of dairy enterprises.

The biological phase is stable and the treatment effect is good: the microbial concentration in the MBR system is high, which improves the biological reaction rate of wastewater treatment, enhances the degradation ability of harmful substances in wastewater, especially organic substances, and also helps to improve the removal efficiency of nutrients such as nitrogen and phosphorus.

Reduce sludge production: MBR membrane can precisely control the sludge residence time, effectively reduce the output of residual sludge, and reduce the pressure of subsequent sludge disposal.

Water resource recovery potential: The effluent treated by MBR has good quality and meets certain reuse standards, which is conducive to the recycling of water resources and the reduction of fresh water consumption.

In general, the application of MBR membrane technology in the treatment of dairy wastewater not only improves the efficiency of wastewater treatment, ensures the standard discharge, but also reflects good economic and environmental benefits, and provides strong technical support for the green development of the dairy industry. In the future, with the continuous optimization and improvement of MBR technology, its application prospects in the field of dairy wastewater treatment will be broader.

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