The application provides a method for preparing
fertilizer by treating
capsaicin waste liquid with pig
manure water and synergistic compound
microbial agent, and is characterized by the following steps: 1) uniformly mixing
capsaicin crystallization refined waste liquid and pig
manure water according to the following
mass percentage: 30-60% of
capsaicin crystallization refined waste liquid, 40-70% of pig
manure water, and adjusting the pH value of the
mixed solution to 6.0-9.0; 2) adding
potassium fulvate in an amount of greater than or equal to 0.5 kg per
ton of the
mixed solution, then adding compound biological
enzyme in an amount of 0.5 kg per
ton of the
mixed solution, and stirring and activating for 30-40 minutes; 3) adding compound
microbial agent in an amount of greater than or equal to 0.5 kg per
ton of the mixed solution, and aerating for 45-50 hours under the conditions of a temperature of 20-30 DEG C and dissolved
oxygen of 2-4 mg / L; and 4) directly preparing organic water-soluble
fertilizer or soil improvement base agent. The capsaicin degradation rate is greater than or equal to 70%, the COD removal rate is greater than or equal to 65%, the
ammonia nitrogen removal rate is greater than or equal to 80%, and the method is suitable for large-scale industrial application.