Method for preparing compound fertilizer by straws

Abstract

The invention particularly provides a method for preparing a compound fertilizer by straws. The method includes the steps of cutting the straws into sections, stacking the straw sections in a fermenting vat, adding an organic matter decomposition agent, and covering the fermenting vat with an environment-friendly degradable plastic film or mud to seal the fermenting vat; subjecting biogas obtained from fermentation to decontamination and purification, and delivering the decontaminated and purified biogas to homes of residents to be used for combustion or / and to be used for production or / and to be stored; subjecting biogas residues and biogas liquid to separation, taking the biogas residues to be used or stored as a pollution-free organic total-nutrient solid fertilizer, and taking the biogas liquid to be used or stored as a pollution-free organic total-nutrient liquid fertilizer; during use, using the solid fertilizer and the liquid fertilizer in a separate or a mixing manner. The method for preparing the compound fertilizer by the straws has the advantages that the produced compound fertilizer is high in nutrition content, the defect that the straws in rural areas cannot be treated and are burned is avoided, the organic fertilizer manufactured by the aid of the straws is beneficial to absorption of plants, and the fertilizer manufactured by the method is wide in usage range.

Description

technical field [0001] The invention relates to crop residue utilization and fertilizer production technology, and in particular provides a method for producing compound fertilizer by using straw. Background technique [0002] In rural areas, straw disposal of crop residues is an unavoidable problem. In the current straw treatment methods, most of them are incineration, which is also commonly known as "burning wasteland". The incineration of straw not only has a serious impact on the atmospheric environment, but also causes localized odors, and severe disasters such as large-scale smog. Moreover, the incineration of straw is not conducive to the reuse of useful substances such as minerals in the straw, and a large amount of resource waste occurs. Contents of the invention [0003] The invention relates to crop residue utilization and fertilizer production technology, and in particular provides a method for producing compound fertilizer by using straw. [0004] The prese...

AI Technical Summary

Problems solved by technology

Moreover, the incineration of straw is not conducive to the reuse of useful substances such as minerals in the straw, and a large amount of resources are wasted.