Biogas residue organic fertilizer and preparation method thereof

Abstract

The invention relates to a biogas residue organic fertilizer and a preparation method thereof. The biogas residue organic fertilizer uses biogas residue as major raw materials (the consumption is higher than 80 percent) to be mixed with humic acid, nitrogenous fertilizers, phosphate fertilizers, potash fertilizers and trace elements. By aiming at two problems that the biogas residue can not be dewatered and solidified easily and the mechanical dewatering has high energy consumption, the invention utilizes a shallow tank natural solidifying and air drying process, and the biogas residue carries out aerobic secondary fermentation, air drying and solidification in a shallow tank to meet the pelletization moisture and physical property requirements. The biogas residue organic fertilizer of the invention can meet the requirement of nutrient required by crop growth, and can also fertilize the soil and improve the yield.

Description

technical field

[0001] The invention relates to a method for producing organic fertilizer by utilizing biogas residue, which belongs to the field of fertilizer. Background technique

[0002] As one of the most effective ways to solve the pollution of livestock and poultry manure and crop straw, biogas technology has developed rapidly in recent years, and its potential environmental and economic benefits have been recognized by the society. However, there are few reports on the further processing of biogas slurry and biogas residues produced after anaerobic fermentation, so that they can be directly applied to crops as commodities. In addition, for large alcohol factories, monosodium glutamate factories and other enterprises, the output Disposal has also become a thorny issue. If these biogas slurry and biogas residues are discarded or used improperly, it will inevitably cause waste of resources and secondary pollution. Studies have found that biogas residues and biogas slu...

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