The production apparatus which uses the technical line of hollow fiber ultrafiltration to treat staple finishing oil wastewater of polyester plant was proved running well and stably by the test of ten monthes running period.
Ultrafiltration theory, type of ultrafiltrationmembrane, current status of development of ultrafiltrationtechnology have been described in detail. Meanwhile,application of ultrafiltration technology on oily wastewater in oilfield, that in petrochemical sector, emulsification wasteliquid in metal processing sector, oil solution waste water in the fiber processing sector, and recycling lanolin from waste water of wool refining.