An organic fertilizer fermentation tank is a device that converts organic solid waste into organic fertilizer through aerobic fermentation of microorganisms in a closed container. It utilizes the decomposition of microorganisms in nature, matures the materials through high temperature and microbial activity, kills harmful substances and reduces the moisture content and volume of the materials.

The working principle is to deliver oxygen to the materials in the tank through a vortex air pump, and continuously turn the materials under the action of the stirring shaft to maintain the activity of aerobic bacteria. These microorganisms will gradually heat up to 50-65 degrees, and after about 7 days of high-temperature fermentation, they will effectively kill insect eggs, pathogens and weed seeds, reaching the standards of harmless treatment. The entire process is highly automated, improving production efficiency.

In livestock farming, processed via microbial action, fermented poultry excreta becomes biofertilizer rich in nitrogenous compounds like ammonia, urea, nitrates, phosphorous, and organic matter. It enhances waste utilization and promotes improved plant growth leading to high yields.