The invention provides a method for producing
organic fertilizer by polyoxin residues, which comprises the following steps: (1) filtering polyoxin
fermentation liquor by a plate frame to obtain bulk polyoxin residues with a
water content of 60-70%; (2) performing high-temperature and high-pressure treatment of the bulk polyoxin residues in a
pressure vessel with a treatment temperature of 120-160DEG C, a saturated
vapor pressure of 0.100 MPa-0.520 MPa, and treating time of 5-30 min; (3) adding
potassium dihydrogen
phosphate and a carrier into the residues treated in step (2), uniformly stirring; (4) adding
borax into the mixture obtained in step (3) to adjust the pH value to 5.5-8.0; (5)
drying the mixture obtained in the treatment of step (4) so as to obtain the
organic fertilizer. The invention aims at residues obtained by
filtration of polyoxin
fermentation liquor, reduces the polyoxin residual amount to zero by high-temperature and high-pressure treatment, has simple operations, short
treatment time, and low production cost; the content of
organic matter is up to 63%; in addition, the
organic fertilizer is rich in
mineral matter and other
plant growth stimulating substances; the purpose of no
pollution is reached; the ascarid egg mortality, the colititer and the contents of other heavy
metal are all within qualified ranges; the organic
fertilizer can be applied to crops safely; and the organic
fertilizer produced by the invention has significant
fertilizer efficiency.