Cascade fermentation and storage method for organic liquid fertilizer

Through the cascade fermentation and storage method of organic liquid fertilizer, the aeration volume and intensity are reduced in stages, and the fermentation process from aerobic to anaerobic is achieved, which solves the problems of fermentation efficiency and microbial activity, and improves the quality and storage time of finished liquid fertilizer products.

CN119707542APending Publication Date: 2025-03-28ZHEJIANG FORESTRY UNIVERSITY +1
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Patent Information

Application Number
CN202411951573.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the existing organic liquid fertilizer production technology, improper treatment of solid substances during fermentation affects efficiency, and microbial activity is easily lost during storage, resulting in a decrease in the effect of liquid fertilizer.

Method used

The cascaded fermentation and storage method of organic liquid fertilizer is adopted to gradually reduce the aeration volume and aeration intensity in stages, from aerobic to anaerobic fermentation, optimize microbial metabolism, ensure fermentation efficiency and maintain microbial activity.

Benefits of technology

It improves fermentation efficiency, maintains microbial activity, extends storage time, increases the organic matter and humic acid content of liquid fertilizer finished products, and optimizes soil quality and plant growth.

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Abstract

The invention discloses an organic liquid fertilizer cascade fermentation and storage method. The method comprises the following steps: 1) primary fermentation: carrying out strong aerobic fermentation on raw materials in a first fermentation device; 2) secondary fermentation: pumping supernatant liquid after primary fermentation is completed and standing to a second fermentation device for secondary fermentation, and gradually reducing aeration quantity and aeration intensity in the fermentation process to reduce aerobic fermentation and improve anaerobic fermentation; (3) storage and fermentation: pumping the liquid subjected to secondary fermentation into a bioreactor for fermentation, further reducing the aeration rate and the aeration intensity, and maintaining the activity of microorganisms while ensuring the metabolism and proliferation of the microorganisms; after fermentation is completed, the liquid fertilizer is directly stored in a bioreactor, microbial metabolism in the fermentation process is optimized in a manner of gradually reducing aeration quantity and aeration intensity in stages, excessive metabolism is reduced in the storage process, and the storage time is prolonged, so that the content of organic matters and humic acid in the liquid fertilizer finished product is increased.
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