| abstract |
The present application provides a method for producing a high-efficiency organic liquid fertilizer by using a biogas slurry and an apparatus therefor. The method comprises the following steps: S1. primary treatment of raw materials, performing primary deodorization and sterilization on the biogas slurry by using a ferrate and a bacteriostatic agent, and performing filtering to obtain a primary treatment solution; S2. re-treatment of the raw materials, further deodorizing the primary treatment solution by using micro-nano bubble water, removing suspended fine particle insoluble substances, and performing filtering to obtain a biogas slurry stock solution; and S3. liquid fertilizer production, freely mixing, according to set different formulae, the biogas slurry stock solution with a nitrogen solution, a phosphorus solution, a potassium solution, an organic solution, and a medium and trace element mother liquor, so as to obtain a biogas slurry liquid fertilizer suitable for different crops and having comprehensive nutrients. The present invention also provides an apparatus used for the method for producing a high-efficiency organic liquid fertilizer by using a biogas slurry. The method provided by the present invention is simple in process, low in construction cost, and high in automation degree; the biogas slurry fertilizer prepared by using the method has an increased commercial value, has comprehensive nutrients, is flexible in formula, and can achieve the maximum utilization of the biogas slurry. |