Abstract: According the properties of natural zeolite and chitosan, a solid adsorbent was made from natural zeolite and chitosan. 120mm natural zeolite was added in chitosan slurry of 90% the degree of deacetylation to prepare adsorbent which mass ratio is 1:1.2. The absorbent can be used to treat aged vinegar. The optimal operation conditions are: the absorbent amount of addition 1.5%, mixing time 5min, at room temperature. After treated by the adsorbent, the vinegar was easily filtered and had a high- quality with amber color and transparence. The vinegar product could be stored for 6 months without any sediment problem. The filtrate slurry can be used for fertilizer and feed additive without environmental pollution .

Key words:  , aged vinegar； chitosan； natural zeolite； clarification； adsorption；