A method for degrading sodium alginate and agar composite membranes using Flavobacterium galactan-eating Flavobacterium zobelia

Abstract

The invention provides a method for degrading sodium alginate and agar composite membrane by using Zobellia galactanovorans. The method comprises the following steps: degrading a sodium alginate and agar composite membrane disc prepared early in a culture solution containing Zobellia galactanovorans for a period of time to obtain a degraded membrane, taking out the degraded membrane, filtering, washing, freezing-drying, weighing with an analytical balance, and comparing the degraded membrane with the membrane before degradation, wherein a result shows that the method disclosed by the inventionhas a relatively good degradation effect. The method disclosed by the invention is safe, environmentally-friendly, convenient and capable of effectively avoiding environmental pollution caused by film degradation by using a conventional chemical method, and has a very broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of membrane degradation, and in particular relates to a method for degrading a composite membrane of sodium alginate and agar by using Flavobacterium galactan-eating Flavobacterium zobellia. Background technique [0002] Zobellia galactanovorans is a marine bacterium that exists widely in nature. The bacterium grows fast and is not easily inactivated, so it has a high application prospect. And it also contains a special effect of degrading agar, which adds to the potential of industrial application. [0003] Among the many factors causing environmental pollution, the public nuisance caused by plastic waste has aroused widespread concern in society. At the beginning of the 21st century, my country used a large amount of plastic packaging materials, and the annual consumption will reach 50 million tons. If 30% of them are disposable foamed plastics, then the annual waste plastics in the country will be more ...

AI Technical Summary

Problems solved by technology

[0004] Biodegradable films are generally split and degraded in the natural environment through the action of microorganisms in soil and water or through the action of ultraviolet rays in sunlight. Although they can be degraded, the degradation rate is relatively slow, and they are not degraded by general bacteria in the air. degradation, which makes it an urgent need to develop a new membrane degradation technology that improves the degradation rate. To this problem, the present invention has developed a method that uses galactan-eating Flavobacterium zobelii to degrade sodium alginate and agar composite Membrane method, which is safe, environmentally friendly and pollution-free, and accelerates the degradation rate