Hollow fiber ultrafiltration membrane

Ultrafiltration (UF) membranes are widely used in various industries. Thanks to their outstanding filtration performance and durability, more and more customers are choosing X's ultrafiltration membrane products. Below are some customer feedback and their success stories. Case 1: Concentration Solution for a Greek Dairy Factory A large dairy producer in Greece used X membrane ultrafiltration membranes in their production process to concentrate milk. The customer shared: "X Membrane's ultrafiltration membranes provide unmatched stability and efficient filtration. Since adopting this membrane, our concentration speed has increased by 30%, and the product quality is more consistent. Most importantly, the membrane’s lifespan has exceeded our expectations, significantly reducing replacement costs." X membrane ultrafiltration membranes not only excel in efficient filtration but also help customers significantly improve production efficiency and reduce downtime. Case 2: Efficient Application by a Malaysian Water Treatment Company A water treatment company in Malaysia introduced JX ultrafiltration membranes to treat industrial wastewater and drinking water. The customer stated: "Compared to the membranes we used before, X’s ultrafiltration membranes perform better in removing contaminants. Their stable operation and low maintenance requirements have helped us save a lot on operating costs. We are pleased to collaborate with X and look forward to using their products in future projects." By using X membrane ultrafiltration membranes, this water treatment company has significantly improved its wastewater treatment process efficiency, reduced chemical usage, and achieved its sustainability goals. Conclusion X Membrane’s ultrafiltration membranes provide more efficient filtration solutions for customers in various industries and have been widely recognized. We are committed to providing high-performance, low-maintenance membrane products to help customers achieve more efficient and environmentally friendly water treatment processes.

Introduction to Ultrafiltration (UF) Ultrafiltration (UF) membranes filtration process that plays a critical role in water purification and wastewater treatment. UF membranes have pore sizes ranging from 0.01 to 0.1 microns, which allows them to remove suspended solids, bacteria, and some viruses from water, making it a versatile solution for many industries. How Does Ultrafiltration Work? Ultrafiltration operates as a pressure-driven process: Feed water is forced through a semi-permeable membrane. Larger particles, such as bacteria, viruses, and suspended solids, are retained on the membrane surface. Clean water (permeate) passes through the membrane, leaving contaminants behind. Key Benefits of Ultrafiltration High Efficiency: UF membranes can remove over 90% of pathogens and suspended solids, ensuring safe, high-quality water. Energy Savings: UF systems operate at lower pressures compared to reverse osmosis (RO) systems, resulting in reduced energy consumption. Cost-Effective: UF provides an economical solution with low operating costs and easy maintenance. Flexible Applications: UF membranes are suitable for both industrial water treatment and residential water purification systems. Applications of Ultrafiltration Drinking Water Treatment: UF systems are used in municipal plants to produce safe drinking water. Pretreatment for Reverse Osmosis (RO): UF serves as an effective pretreatment stage in desalination plants, enhancing the performance of RO membranes. Industrial Water Filtration: UF is widely used in industries such as pharmaceuticals, food and beverage, and power generation to purify process water and treat wastewater. Overcoming Ultrafiltration Challenges Despite the efficiency of UF, fouling remains a common issue. However, regular cleaning protocols, optimized membrane designs, and advanced operational strategies have significantly reduced membrane fouling, ensuring long-term performance.

1. Overview During the long-term operation of the ultrafiltration device, the impurities in the water will accumulate over time, and the separation performance of the membrane is gradually affected. Therefore, the ultrafiltration device needs to chemical clean the membrane components regularly and irregularly to restore the performance of the membrane. Compared with normal operation, the water production of the ultrafiltration system decreases by more than 10%~20% or the transmembrane pressure difference increases by 0.08~0.1MPa (the transmembrane pressure difference shall not exceed 0.2MPa at any time), and the membrane flux cannot be restored by backwashing, the ultrafiltration system should be cleaned chemically. Chemical cleaning is using a certain concentration of specific chemical agents in the membrane system for circulation and soak, to clean the dirt on the surface of the membrane wire. Chemical agents are selected according to the type of water quality and the pollution characteristics of the membrane components. 2. Selection of chemical cleaning agents (1) Alkali washing: 0.2% sodium hypochlorite (according to the effective chlorine meter) + 0.1% sodium hydroxide solution, that is, the ratio of 10% sodium hypochlorite solution adding 20L and 1kg sodium hydroxide solid per 1 ton of water. Scope of application: when the organic content in the water is high, it may cause the filter membrane to be organic matter pollution. And when the conditions are conducive to biological survival, some bacteria and algae will also multiply in the ultrafiltration membrane components, resulting in biological contamination.     (2) pickling: 1~2% citric acid solution or 0.2% hydrochloric acid solution, that is, the ratio of 7kg of industrial hydrochloric acid or 10~20kg of citric acid per ton of water. Scope of application: when the content of Fe, Mn or other metals in the inlet water exceeds the design standard, or the suspended matter in the inlet water of ultrafiltration membrane components is particularly high, and the non-organic pollution caused to the inlet side of the membrane. 3. Specification table of common agents Table 1 Specification table of common agents for chemical cleaning name specifications Active substance content Clean the use concentration Sodium Hypochloride (NaClO) 25KG / barrel Effective chlorine concentration of 8 to 10% 0.1~0.5% (as active chlorine meter) Sodium hydroxide (NaOH) 25KG / package 99% 0.1~0.2% Industrial hydrochloric acid (HCl) 25KG / package 26%~30% 0.1~0.5% citric acid 25KG / barrel 99% 1~2% 4. Flow chart of chemical cleaning   Figure 1 Flow chart of ultrafiltration chemical cleaning 5. Cleaning steps A. Close the ultrafiltration device according to the shutdown procedure, and close all the valves on the device; B. Prepare the acid / base solution in the cleaning solution box and stir well to mix well;C. Open the cleaning water inlet valve (V03) and the cleaning fluid return valve (V04, V05), and then start the cleaning pump.Allow the wash solution into the membrane assembly and return to the wash solution chamber. The cycle cleaning time is60min-120min； D. Close the cleaning pump, set the static soak, the time depends on the pollution situation, generally more than 60min; E. Wash in recirculation for 10-20min; F. Backwash and forward wash of the ultrafiltration device alternately until the drainage PH value of the ultrafiltration device is neutral; G. Continue the second agent cleaning or return to the production run state.