Production method of potassium fulvate organic fertilizer prepared from black liquor extracted through biological enzyme pretreatment and potassium hydroxide alkaline reed pulping

Abstract

The invention discloses a production method of a potassium fulvate organic fertilizer prepared from black liquor extracted through biological enzyme pretreatment and potassium hydroxide alkaline reed pulping, and belongs to the field of fertilizer production. The production method comprises the following steps: using biological enzymes to process reeds to extract black liquor; boiling reeds to extract black liquor through a potassium hydroxide alkaline method, and producing finished products of potassium fulvate organic fertilizer. The biological enzyme pretreatment comprises steps of preparing raw materials through a wet method, using biological enzymes to process reeds, and storing the black liquor rich in potassium fulvate. The potassium hydroxide alkaline method comprises the following steps: extruding reeds, which has been preprocessed by biological enzymes, mixing the reeds with potassium hydroxide in a pre-soaking machine, boiling and steaming the mixture in a steam ball, and collecting the black liquor after steaming and boiling. The organic fertilizer production comprises steps of black liquor evaporation and concentration, pulp spraying and granulation, hot-cold sieving, and finished product package. The wastes are converted into valuable resources. The soil particle structure is improved. The soil is loosened. The water and fertilizer retaining performance of soil is enhanced.

Description

technical field [0001] The invention belongs to the extension of the technical field of papermaking and extends to the field of agricultural production of organic fertilizers, and specifically relates to a method for extracting potassium fulvic acid organic fertilizer from black liquor produced in the process of reed pulping by biological enzyme pretreatment + potassium hydroxide alkali method method. Background technique [0002] At present, the cooking of paper mills generally uses the reaction process of chemical dissolution and lignin removal. The general chemical pulping not only needs to use various chemicals, but also has high cost and high energy consumption. If the black pulp produced If the liquid is directly discharged into the sewage treatment plant, the cost of sewage treatment will be greatly increased. [0003] Fertilizer is a direct or indirect supplier of nutrients needed for crop growth, and has the function of improving soil properties and improving crop ...

AI Technical Summary

Problems solved by technology

"Method of Producing Fertilizer Using Potassium Hydroxide Alkaline Papermaking Black Liquor" (patent application number: 03122742.2), although it talks about the use of potassium hydroxide alkali method to produce fertilizers from papermaking pulping black liquor, but the mentioned raw materials and preparation The process is too broad, not specific and clear, and it is difficult to implement it in actual operation

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