| 摘要 |
The present invention relates to a method for liquefied fertilizer of livestock excretion. The method for liquefied fertilizer of livestock excretion comprises: a pre-processing step of separating livestock excretion into sludge that is a solid material, and a liquid material by using an adulteration eliminator (10) and a solid-liquid separator (20) in order to perform a pre-processing; a high aeration fermentation step of transferring the liquid material separated from the pre-processing step to a first anaerobic liquefied fertilizer bath (100) so as to contact anaerobic microorganisms supplied from a microorganism cultivation bath (700) and of fermenting by being supplied with oxygen from an air diffuser (110) and an oxygen transfer underwater mixer (120); and a low aeration fermentation step of transferring the liquid material that has gone through the high aeration fermentation step to a second anaerobic liquefied fertilizer bath (200) and of fermenting by maintaining a concentration of dissolved oxygen (DO) in a predetermined value range by using at least one of the air diffuser (110) and the oxygen transfer underwater mixer (120). |
