The invention relates to a cooperative
pretreatment method for biological
catalysis and controlled oxidation of cotton and cotton-type fabrics, comprising the following steps: (1) preparing a biological compound
enzyme preparation, a biological
enzyme synergist and a non-ionic surfactant into an
enzyme working solution, wherein the pH of a
processing bath is 6-7.5; padding the fabrics into the working solution; carrying out heat preservation; (2) washing the processed fabrics with cold water; padding the fabrics into a
hydrogen peroxide bleaching solution containing the controlled
decomposition additive of
hydrogen peroxide; and
steaming, washing with water and
drying to obtain the finished products. In the method, high-density strong base is not required to serve as a
scouring agent, thepH value of pretreatment waste water is 7-8, the
chromaticity is low, the COD (
Chemical Oxygen Demand) value is lowered by 30% compared with that of the traditional alkali kiering pretreatment technology, the water is saved by 10-30%, and the steam and
electricity can be saved by 20%. The indexes (whiteness, capillary effect, water absorption, cotton seed
hull strainaway rate,
desizing rate, strong force and the like) of the processed cotton and cotton-type fabric all reach the quality indexes of a semi-product, cotton seed hulls can be completely removed, and the fabrics have
vivid color andgood
levelling property after being dyed.