2results about How to "Improve compost quality" patented technology

The utility model provides a dynamic aerobic composting device suitable for mixed fermentation of traditional Chinese medicine residues and organic wastes, which relates to the field of biomass aerobic fermentation and comprises a sealed cylinder, a stirring shaft with a hollow structure and a ventilation fan, the sealing cylinder is obliquely arranged up and down in the horizontal direction, the two ends of the sealing cylinder are rotationally connected with the front wall plate and the rear wall plate correspondingly, and the sealing cylinder is used for mixed fermentation of traditional Chinese medicine residues and organic waste; the stirring shaft is fixed in the sealing barrel in the axial direction of the sealing barrel, double-helix blades are evenly arranged on the stirring shaft, vent holes are evenly formed in the stirring shaft in the length direction of the stirring shaft, and an air outlet pipe of the ventilation fan is sealed with the rear wall plate and the tail end of the sealing barrel and then penetrates into a cavity of the stirring shaft; an oxygen sensor, a humidity sensor, a temperature sensor and a water inlet are arranged on the sealed cylinder at intervals. The problem of long composting period caused by difficulty in precise and automatic linkage regulation and control of multiple indexes of temperature, humidity and oxygen during synergistic fermentation of the traditional Chinese medicine residues and the organic wastes is solved.

This invention provides a method and application for preparing bio-organic fertilizer through synergistic composting of biochar-containing biogas residue, belonging to the field of organic fertilizer preparation technology. The method includes: preparing biogas residue through anaerobic fermentation of livestock and poultry manure and crop straw; adding biochar and a compound microbial agent; conducting high-temperature aerobic composting; and obtaining bio-organic fertilizer through maturation and aging. The amount of biochar added is 5%-10% of the dry basis weight of the composting raw materials; the aerobic composting time is 35-45 days; and the high-temperature composting temperature is 55-65℃. The compound microbial agent includes *Bacillus steatophilus*, *Bacillus amyloliquefaciens*, and *Bacillus mucilaginosus*. The bio-organic fertilizer obtained by this invention can be used for crop soil improvement. This invention, through the synergistic effect of biogas residue, biochar, and compound microbial agent, effectively shortens the composting cycle, improves compost maturity, reduces nitrogen loss, passivates heavy metals, and significantly improves the quality of organic fertilizer.