Method for resource utilization of agricultural wastes

Abstract

The invention discloses a method for resource utilization of agricultural wastes, wherein the method comprises the following steps: the agricultural wastes are put into a digestion tank and fermented,and biogas is compressed by a compressor after passing through a purification system for standby application; biogas slurry enters a liquid storage tank for storage through a primary filtration device, a pump and a secondary filtration device; a water outlet pipeline of the liquid storage tank and a water outlet pipeline of agricultural irrigation are connected for coupled irrigation for crops; the water outlet pipelines are each equipped with a water flowmeter for controlling the mixing ratio of the biogas slurry and water; a small part of bottom sediments in the digestion tank are collectedas an inoculum in next fermentation broth, mixed in agar, and retained in an anaerobic environment; the remaining biogas residue is put in a stack retting tank, and a reagent is added in the stack retting tank, so that the biogas residue can form a humic acid fertilizer. The method not only produces biogas to provide energy, but also avoids the biogas slurry blocking pipelines and pumps, ensuresthe activity of the inoculum of the fermentation broth, and improves the fertilizer efficiency of the biogas residue.

Description

technical field [0001] The invention belongs to the field of resource utilization, in particular to a method for resource utilization of agricultural waste. Background technique [0002] The resource utilization of waste not only solves the problem of waste disposal, improves environmental sanitation, but also eases the pressure on resource input. For rural areas, the main source of garbage is agricultural waste. my country's agriculture has been aiming at high yield for a long time, and its technical system is generally dominated by increasing production and income. To a considerable extent, there are phenomena of sacrificing the ecological environment and wasting resources. The technical reserves for efficient use of resources, ecological environment governance and cultivation are extremely weak. [0003] The biogas fermentation eco-agriculture model that mainly deals with livestock and poultry manure, straw and various agricultural wastes has found a powerful connection ...

AI Technical Summary

Problems solved by technology

[0004] In the existing resource utilization of agricultural waste, the biogas slurry produced by biogas fermentation often contains impurities, which often block pipelines and pumps when used; the biogas residue is often used as base fertilizer and directly sprinkled on the field, and the fertilizer efficiency is not high; for fermentation For the feed liquid, a small part of the bottom sediment in the digestion tank is often collected as the inoculum in the next fermentation feed liquid. However, for the improperly preserved inoculum, the activity is not high, and even a large number of colonies will die, which is not up to expectations. Effect

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