The core competitiveness of bio-organic fertilizer lies in the activity of beneficial bacteria; the survival rate of these bacteria directly determines the fertilizer’s effectiveness. Many bio-organic fertilizer production lines fail to meet standards for the number of viable bacteria in the finished product, not because of inferior strains, but because microbial protection is neglected during production, leading to the significant inactivation of viable bacteria.
Pretreatment is the first step in protecting bacteria; high-temperature grinding must be avoided. Bio-organic fertilizer raw materials often contain coarse fibers; therefore, the equipment speed and friction temperature must be strictly controlled during grinding to prevent localized high temperatures from killing viable bacteria. The proportions of auxiliary materials should be mild, avoiding strong acid and alkali regulators.
Strict temperature control is crucial during the fermentation stage. Beneficial bacteria thrive best below 55℃. During fermentation in bio-organic fertilizer production lines, the compost pile must be turned regularly to dissipate heat; the pile temperature must not exceed 60℃ for extended periods. This ensures both harmless treatment and prevents the high temperatures from killing the viable bacteria.
Granulation and drying processes should avoid harsh operating conditions. Gentle granulation equipment is selected to reduce damage to the microorganisms caused by high pressure and strong friction; a low-temperature hot air drying process is used to avoid high-temperature rapid drying, and cooling is slow to prevent excessive temperature differences from causing microbial inactivation.
Post-production packaging and storage are also crucial. The finished product must be quickly sealed in packaging to protect it from strong light and moisture, and then stored in a cool, ventilated place immediately after packaging to avoid exposure to sunlight and rain, which could accelerate the death of live bacteria.
The core of the bio-organic fertilizer production line is not just the molding and processing, but also the continuous protection of the live bacteria’s activity. Only by controlling every detail of microbial protection can the fertilizer truly exert its soil-improving and productivity-enhancing effects.