The invention discloses a method for producing a biological
feed additive by using cassava residue and waste
alcohol sediment liquid. The method comprises the steps of mixing the waste
alcohol sediment liquid and the cassava residue according to the weight ratio of (5-10): (3-4), sterilizing, inoculating strains, then, fermenting, and
drying a fermented cassava residue mixture, thereby finally obtaining the biological
feed additive containing a large number of microbial thalli, wherein the inoculated strains are prepared from
bacillus subtilis,
bacillus licheniformis and
aspergillus niger which are in the
flora number ratio of (1-2): (1-3): (1-4), and the weight ratio of the strains to a moist cassava residue mixture is (5-10): 100. The method has the advantages that in the produced biological
feed additive, the content of crude
protein is not lower than 16%, the content of amino acids is not lower than 1.6%, and the biological feed additive per
gram contains not smaller than 1.0*105
probiotic bacillus, so that sufficient
nutrition can be guaranteed; the biological feed additive is subjected to high-degree
acclimatization with the PH value of about 3.0 during
fermentation, so that the passing of a test of
gastric acid of breeding objects is facilitated, and the effect of promoting growth is exerted; meanwhile, the generation of
ammonia gas (NH3),
hydrogen sulfide (H2S) and
skatole is inhibited, so that the air environment of farms is improved.