The core value of bio-organic fertilizer lies in the activity of its functional microorganisms, and every step in the bio-organic fertilizer production line can affect microbial survival. Effective protection requires scientific management and control throughout the entire process, from raw material processing to finished product packaging.
During the raw material pretreatment stage, the carbon-nitrogen ratio and moisture content must be precisely controlled. Microbial growth depends on an appropriate nutrient ratio. The raw material carbon-nitrogen ratio should be adjusted to between 25:1 and 30:1. Excessively high or low carbon-nitrogen ratios will inhibit microbial metabolism. Moisture content should also be controlled between 50% and 60%, with real-time monitoring using an intelligent moisture meter to prevent excessive moisture from leading to anaerobic fermentation, or excessive moisture from affecting microbial activity.
The fermentation stage is crucial for microbial propagation. When using a compost turning machine for fermentation, the turning frequency must be controlled to ensure that the oxygen content in the fermentation pile remains between 8% and 15% to prevent localized hypoxia that can lead to the death of beneficial bacteria. The fermentation temperature should be strictly controlled between 55°C and 65°C. This range effectively kills pathogens while ensuring the survival of functional bacteria. Precise adjustment can be achieved through temperature sensors linked to the temperature control system. The drying process must avoid high-temperature damage. Traditional high-temperature drying can easily lead to significant microbial inactivation. Low-temperature, negative-pressure drying technology is recommended. Keep the drying temperature between 35°C and 45°C, while maintaining appropriate wind speeds. Reduce moisture to below 15% within 4-6 hours to maximize microbial activity. After drying, the product must be quickly cooled to room temperature to prevent residual heat from affecting the stability of the inoculum.
Product handling and storage are equally important. Before packaging, the product must be screened in a sterile workshop to remove impurities and prevent contamination from external bacteria. Light-proof, breathable inner film packaging bags should be used to prevent direct ultraviolet radiation from damaging microbial cells, and a one-way exhaust valve should be installed to balance the air pressure within the bag. Storage warehouses should be ventilated and dry, with a temperature of 20°C to 25°C and a relative humidity below 60%. Regular microbial counts should be tested to ensure that the product meets the required activity standards before shipment.
Protecting microbial activity throughout the entire bio-organic fertilizer production line requires a combination of process optimization and intelligent management and control. By precisely controlling environmental parameters, bio-organic fertilizers can truly realize their ecological and agricultural value.