Method used for preparing drip-irrigation special-purpose fertilizer from biogas slurry

Abstract

The invention relates to a method used for preparing a drip-irrigation special-purpose fertilizer from biogas slurry. The method comprises following steps: (1) biogas slurry obtained via more than one month of normal and stable gas generation is pumped into a buffer tank for natural sedimentation so as to obtain a supernate; (2) the supernate is filtered so as to obtain a filtered biogas slurry, the filtered biogas slurry is sterilized and is pumped into a nutrient element adding tank and a microorganism adjusting tank respectively; (3) potassium humate, urea powder, monopotassium phosphate, monoammonium phosphate, organic silicone, and trace elements are added into the nutrient element adding tank successively, and are stirred until dissolving is realized so as to obtain a biogas slurry containing nutrient element solutions; (4) a microbial agent is added into the microorganism adjusting tank, and an obtained mixture is uniformly stirred so as to obtain a biogas slurry containing microorganism; and (5) the biogas slurry containing nutrient element solutions and the biogas slurry containing microorganism are delivered into a composite microorganism fertilizer stock solution tank for stirring so as to obtain a fertilizer stock solution, and the fertilizer stock solution is filtered so as to obtain a clear solution which is the drip-irrigation special-purpose fertilizer. Operation steps of the method are simple; production cost is low; and the method is convenient.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a method for preparing special fertilizer for drip irrigation from biogas slurry. Background technique [0002] The use of anaerobic fermentation technology to treat biomass organic waste can realize waste harmless treatment and resource recycling. Not only can biogas be obtained as a green and clean energy product, but the by-product biogas residue and biogas slurry can be further processed into high value-added fertilizer products. [0003] Nitrogen, phosphorus, and potassium in biogas slurry are essential nutrients for crop growth. Using biogas slurry as topdressing or liquid surface fertilization during crop growth not only makes crops grow vigorously, but also prevents insects and diseases. Because it is in liquid form, it is designated as external fertilization, and its effect is better than that of chemical fertilizers, and it can be carried out during the...

AI Technical Summary

Problems solved by technology

[0005] At present, most domestic patents on producing fertilizer from biogas slurry adopt the method of concentrating the biogas slurry to produce fertilizer, so that most of the biogas slurry is discharged directly, or discharged after the treatment reaches the standard, which wastes water resources. At the same time, the biogas slurry must be discharged The treatment facilities and equipment required for clear liquid treatment to meet the standard discharge require large investment and high treatment and operation costs