Ultrafiltration technology (UF) can be used alone or in combination with other treatment methods in the following industrial fields for separation purposes:
Preparation of pure water and ultrapure water: used for the primary purification of industrial water, and used as the pretreatment and terminal treatment of reverse osmosis (HF, RO) and electrodialysis (ED) in the preparation of ultrapure water.
Biopharmaceuticals: concentration, desalination, purification and extraction of enzymes, viruses, toxins, bacteriophages, whey and various protein dilute solutions. Treatment of water at all levels in the hospital, concentration and purification of blood and biological products.
Chemical industry: separation and concentration of latex, emulsion, colloid, metal oxide, gelatin, pigment, etc. Water injection treatment for ultra-low permeability oil wells in oil fields.
Food industry: sterilization and purification of beverages and drinking water. Turbidity removal and clarification of mineral water, pre-stage and terminal treatment of purified water, turbidity removal and clarification of oral liquid, pulp separation of fruit juice drinks, processing of soybean products and dairy products. Water preparation in food processing technology and recovery of food valuable substances.
Industrial wastewater treatment and recovery of useful substances:Electroplating wastewater treatment and useful material recovery, electrophoretic paint wastewater treatment and recovery, brewery wastewater treatment, oily wastewater and degreasing wastewater recovery, fiber industry oil recovery, textile industry PVA (polyvinyl alcohol) dyeing water treatment And recycling, wastewater treatment in the paper industry.
Using the effluent from the secondary sedimentation tank of the sewage treatment plant as raw water, the water quality of the ultrafiltration membrane reclaimed water reuse system is excellent. The conclusion of the inspection by the Chinese Academy of Preventive Medicine and the Institute of Sanitary Engineering is: when the effluent flow is 500m3/d, the sensory indicators, dissolved solids, suspended objects, BOD5, CODcr, total nitrogen of the ultrafiltration effluent water reused , Total E. coli group respectively meet the requirements of water quality standards for domestic miscellaneous water (CJ25.1-89). The retention rate of membrane to E. coli is 100%, the retention rate of SS is 55%-100%, the retention rate of BOD5 is 32%-66%, and the retention rate of CODcr is 20%-60%.
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