Abstract: An investigation of scouring of flax roves with pseudomonas sp DA10(CGMCC No.3851) and their polysaccharide-degrading enzymes was carried out. Dosage of fermentation beers, initial pH, scouring temperature and treatment time were studied. The result indicated that flax roves treated with 150mL fermentation beers at 40℃ and pH 9 for more 7h or less also could gain satisfied performances in mild bacteria scouring. However, pretreatments intervention can improve bacteria scouring greatly with higher degree of splitting and fiber bundles strength. The properties of fibers after low-concentration alkali-bacteria combined scouring were the best. SEM was also used to assess removal of gummy materials. It indicated that flax roves treated by bacteria scouring at initial pH 9 and 40℃ for 8h could achieve a specific degree of separation in spite of incomplete removal of gummy materials. When alkali pretreated fibers were subsequently treated by bacteria scouring, a complete removal of gummy materials was observed.

Key words: flax , roves , bacteria scouring , preteratment-bacteria scouring combination system , pseudomonas sp