In order to increase the output of bioflocculant,improve its efficiency and stability and enlarge its application scope,four yeast-like flocculant-producing strains were cultured in distillery wastewater and the optimum culture conditions were investigated.

The distillery wastewater was used as culture medium instead of traditional expensive culture medium to culture their mixed strains HXJ-1.

Turbidity easily occurs in blending liquor due to the change of solubility conditions of the solute.

Although the causations for precipitate in blending liquor are in many ways and the precipitate components are complicated, we can use different methods for the analysis of the relative precipitate components: Silico-tungsten acid method, Mayer method and Dragendorff method for the analysis of alcaloid; Ninhydrin method, Biuret Reation method etc.

This study reduced the cost of product,and solved the problem that aroma was single in the vinegar production by alcohol.

The precipitate of imitation fruit wine was mainly induced by four factors: microbial pollution,inadequate operation or filtration equipment failure,overuse of clarifier,and natural precipitate in shelf period.