Study on the Biodegradability of Protein Fibers and Their Products in Activated Sludge

Xiao Ying Zhang; Jian Tao Niu; Qi Lei Tian

doi:10.4028/www.scientific.net/AMR.602-604.1227

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Study on the Biodegradability of Protein Fibers and Their Products in Activated Sludge
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Study on the Biodegradability of Protein Fibers and Their Products in Activated Sludge

Abstract:

In order to study the biodegradability of protein fibers and their products, wool and silk fabrics were selected as the samples, and they were buried in the activated sludge of the riverside. Moreover, changes in the surface morphological structure and internal microstructure after degradation were observed and tested by scanning electron microscopy (SEM) and X-ray diffraction techniques. The results indicated that the degradation rate of wool fiber was higher than that of mulberry silk fiber in the activated sludge. In addition, with the increase of degradation time, there were traces gradually gnawed by microorganisms and some millipores and cracks appeared. Buried in the activated sludge for 40 days, both wool fiber and mulberry silk fiber formed new diffraction peaks near the place of 2θ=26°, meanwhile, the molecular structure of the fibers changed and the crystallinity decreased accordingly.