To increase output, stabilize live bacteria, reduce malfunctions, and minimize losses in bio-organic fertilizer production lines, a systematic upgrade and transformation can be implemented in five areas: fermentation, crushing and mixing, granulation, automation, and corrosion protection. This will comprehensively improve the stability of the production line and the quality of the finished product.

First, optimize the fermentation section to improve the uniformity of composting. Existing compost production machine can be upgraded to a hydraulically adjustable turning structure, automatically adjusting the turning depth and frequency according to the dryness and wetness of the material to avoid localized suffocation and incomplete fermentation. Adding exhaust ventilation, dust removal, and dehumidification systems to the workshop reduces moisture accumulation, minimizes material acidification, odor, and loss of live bacteria, resulting in more stable organic matter and microbial activity in the semi-finished product.

Second, upgrade the crushing and mixing systems to solve the problems of uneven particle size and mixing. Replace ordinary crushers with denser, wear-resistant hammers and screens to strictly control the material fineness to within 2mm; upgrade ordinary mixers to a weighted ribbon structure to increase material convection mixing, resulting in more uniform mixing of microbial agents and trace elements, eliminating problems such as fluctuating nutrient levels and uneven distribution of live bacteria in the finished product.

The granulation section underwent targeted upgrades to improve molding stability. Feed moisture content was uniformly controlled at 8%–12%, and a variable frequency, uniform-speed forced feeding system was installed to eliminate problems such as roller sticking, granule rot, and excessive return material caused by inconsistent feeding speeds. The roller skins are made of high-wear-resistant alloy steel, improving molding rate, reducing particle dust, and resulting in higher finished product hardness, better storage and transportation resistance, and no caking.

Finally, automation and corrosion protection upgrades were implemented. Automatic batching, online weighing, and variable frequency speed control systems were added to reduce human error and stabilize output by over 20%. All parts in contact with materials were treated with stainless steel for corrosion protection, reducing salt corrosion and material residue buildup, lowering failure rates, extending the service life of fertilizer production machine, making the overall production line more stable, and significantly improving the finished product qualification rate.