Abstract: In order to establish a technology of cleaning and utilizing solid waste as resource in tannery industry,enzymatic hydrolysis of formaldehyde tanning solid waste was carried out by JW enzyme preparation,and the industrial and agricultural applications of enzyme hydrolysate was evaluated. The results indicated that the skin pieces in solid waste were completely hydrolyzed by JW-4 enzyme. The length of animal fiber recovered after the enzymatic hydrolysis of the skin pieces was better than that by scrap knives,and their strength and elongation of fracture were equivalent to that of the original hair fiber. The hydrolysate contained a lot of small peptides and amino acids,in which the concentration of amino acid was 5.23%,the content of freeformaldehyde was 37.34 mg/kg,and the content of heavy metal was lower than the standard of amino acid fertilizer. The wheat rooted 1d in advance after wheat seeds cultivated with the hydrolysate,and plant fresh weight after 6 d cultivation was heavier 13% than the control. Treating leather and solid waste with clean products not only causes no secondary pollution,but also the solid waste could be utilized as resources.

Key words: enzyme, utilization as resource, solid waste, animal fiber, fertilizer