Biogas slurry recovery system and method for preparing liquid compound fertilizer using the system

Abstract

The invention discloses a biogas slurry recovery system and a method for preparing a liquid composite fertilizer by using the system. The biogas slurry recovery system comprises: an aerobic fermenting tank; a harmless treatment tank, wherein a large particle size biomembrane for purifying a biogas slurry is arranged in the harmless treatment tank, and the harmless treatment tank is connected with the aerobic fermenting tank; a filtering and concentrating system comprising a filter tank and a negative pressure concentrating reactor; and a complexing tank connected with the negative pressure concentrating reactor. A quantitative medicine adding device is arranged in the complexing tank. The liquid composite fertilizer produced in the invention can effectively reserve active components in the biogas slurry, provides various necessary natural complxed trace elements for plants, is rich in various amino acids, polypeptidases and plant growth hormones, benefits absorption utilization of crops, and promotes the growth of the crops.

Description

technical field [0001] The invention relates to the field of organic waste recycling, in particular to a biogas slurry recovery system and a method for preparing liquid compound fertilizer by using the system. Background technique [0002] In recent years, with the development of industry and agriculture, especially the development of livestock and poultry breeding, a large amount of organic waste is produced. At present, the recycling of organic waste through fermentation is an important issue to solve the pollution of organic waste. [0003] A large amount of biogas slurry is produced in the recycling of organic waste, and biogas slurry is a well-known bio-organic fertilizer with both quick-acting and long-term effects. The fertilizer effect is more than 10 times that of ordinary chemical synthetic fertilizers. It completely replaces chemical fertilizers and is the best fertilizer for producing organic food. Biogas slurry is rich in nitrogen, phosphorus, potassium, variou...

AI Technical Summary

Problems solved by technology

[0008] (3) There is a lack of efficient biogas slurry production methods. The amount of biogas slurry produced by large-scale livestock and poultry farms reaches hundreds of cubic meters per day. Then it will inevitably fail to meet the requirements of factory production and operation, and the production of biogas slurry compound fertilizer will lack efficiency and cannot solve practical problems.

[0009] In addition, biogas slurry often needs to add certain chemicals during the complexation reaction stage. At present, problems such as inaccurate dosing and blockage of chemical dosing are common in the process of dosing, which seriously affect the effect of complexation.

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