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Principle of Hollow Fiber Ultrafiltration Membranes and Maintenance Methods

Principle of Hollow Fiber Ultrafiltration Membranes and Maintenance Methods

Compared to traditional separation methods, hollow-fiber ultrafiltration technology operates at ambient temperature under mild conditions that prevent degradation of sensitive components. This makes it particularly well-suited for separating, fractionating, concentrating, and enriching heat-sensitive substances such as enzymes and fruit juices. Ultrafiltration boasts high separation efficiency, making it highly effective for recovering trace components from dilute solutions as well as concentrating low-concentration solutions—both processes are environmentally friendly and energy-efficient.

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2020/06

The Correct Method for Storing Hollow Fiber Ultrafiltration Membranes

The Correct Method for Storing Hollow Fiber Ultrafiltration Membranes

Hollow fiber ultrafiltration membranes have found widespread application in industrial fields, playing a crucial role in separation, concentration, and purification processes across sectors such as biopharmaceuticals and the food industry. They are also commonly used in wastewater treatment systems and as final-stage treatment units in ultrapure water production. Before use, hollow fiber ultrafiltration membranes are typically immersed in a protective solution to ensure proper sealing and preservation. This prevents the wet membrane from dehydrating, which could otherwise lead to shrinkage, narrowing of membrane pores, structural damage, and a subsequent decline in water flux. Below, we’ll briefly introduce two common methods for preserving these membranes.

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2020/06

When is it necessary to clean a hollow fiber ultrafiltration membrane?

When is it necessary to clean a hollow fiber ultrafiltration membrane?

The key operational parameters that ensure stable performance of hollow-fiber ultrafiltration membranes include water production backpressure, water production flow rate, recovery rate, temperature, and TDS levels. If these operating parameters fluctuate—especially when contamination occurs or if there are significant changes in the primary operating conditions—it’s recommended to verify whether the reverse osmosis system is functioning properly. Monitoring the overall performance of the time monitoring system is a fundamental method for assessing whether the hollow-fiber ultrafiltration membrane modules have become fouled. Membrane fouling typically progresses gradually, with the extent of its impact depending on the specific characteristics of the contaminant. As for cleaning cycles of fouled reverse osmosis membranes, they should be determined based on site-specific conditions; however, a typical cleaning interval falls between 3 and 6 months.

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2020/06

How to Clean Hollow-Fiber Ultrafiltration Membranes

How to Clean Hollow-Fiber Ultrafiltration Membranes

Raw water in hollow-fiber ultrafiltration membranes flows either outside or inside the hollow fibers under pressure, creating either an external-pressure or internal-pressure configuration. Ultrafiltration is a dynamic filtration process, where the retained substances can be removed via concentrated streams without clogging the membrane surface, allowing for long-term, continuous operation. Hollow-fiber ultrafiltration membranes are among the earliest developed polymer separation membranes. Now, let’s learn how to clean these hollow-fiber ultrafiltration membranes!

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2020/06

What are the different classifications of MBR membranes?

What are the different classifications of MBR membranes?

Currently, in the wastewater treatment manufacturing industry, MBR membrane bioreactors are being widely adopted with significant capital investment. Depending on the membrane components and underlying principles, MBR membrane bioreactors can be classified into different types.

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2020/05

Daily inspections are essential during the operation of MBR membranes.

Daily inspections are essential during the operation of MBR membranes.

Compared to traditional wastewater treatment methods, the MBR membrane bioreactor demonstrates superior performance in treating sewage, offering advantages such as high efficiency and a smaller footprint. In recent years, it has experienced rapid growth within China's wastewater treatment industry.

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2020/05

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