Method for preparation of high-activity compound organic fertilizer by waste acid liquid of D-glucosamine hydrochloride

Abstract

The invention relates to a method for the treatment of organic process waste liquid of high-acidity black ammonic sugar, especially to a method for the preparation of high-activity compound organic fertilizer by waste acid liquid of D-glucosamine hydrochloride. The method for the preparation of high-activity compound organic fertilizer by waste acid liquid of D-glucosamine hydrochloride comprisesthe following steps of: concentrating waste mother liquid to recover hydrochloric acid, neutralizing dregs and slurry with KOH alkali liquor; adding chitosan to neutralized liquid for being stirred and sufficiently dissolved; heating up and adding the neutralized liquid with mixed enzyme for enzymolysis, and then destroying enzyme; regulating PH with the KOH alkali liquor and simultaneously adding missing microelement-containing organic compound; and pump-filtering the above liquid and using the liquid as fertilizer after filtration or as solid fertilizer after drying. The compound chitosan fertilizer of the invention is suitable for the growth of various crops and the improved soil, thereby zeroing waste water discharge and changing economic environment. The method is simple in operation, convenient for being performed and suitable for the conversion of a large amount of waste water into fertilizer.

Description

technical field

[0001] The invention relates to a treatment method for high-acidity black glucosamine production organic process waste liquid, in particular to a method for preparing high-activity compound organic fertilizer by using waste acid liquid of glucosamine hydrochloride. Background technique

[0002] Chitin is hydrolyzed with hydrochloric acid (31%) to prepare glucosamine hydrochloride (hereinafter referred to as glucosamine). In the domestic traditional production process, chitin is hydrolyzed once to extract glucosamine, and the yield of glucosamine is 45%-50%. The current advanced production process is secondary hydrolysis of chitin to extract glucosamine, and the yield of glucosamine is 50%-55%. The yield of glucosamine after the first hydrolysis is 40%-45%. After mother liquor reclaims hydrochloric acid, hydrolyze with hydrochloric acid (31%) for the second time, the yield of ammonia sugar is at 5%-10%, after mother liquor reclaims hydrochloric acid for the s...

Examples

Embodiment Construction

[0027] A detailed description will be given below of specific embodiments of the present invention.

[0028] 1. Glucosamine hydrochloride and waste acid solution formed by hydrolyzing commercial chitin (moisture ≤ 10%, ash content ≤ 10%) with hydrochloric acid (31%). The slurry after recovering the hydrochloric acid from the waste acid solution is then put into the reaction kettle and slowly added the lye containing potassium hydroxide (concentration 3%-5%) to neutralize the slurry to pH4.0-5.0. The amount of lye added is 0.5-1 times that of the slurry.

[0029] 2. Add the neutralizing solution to chitosan 0.5%-1% (W: V), [the degree of deacetylation (D.D) of chitosan is 70%-85%, and the molecular weight (Mw) is 50×10 4 -60×10 4 】After fully dissolved, add mixed enzymes (acid protease, cellulose 5 enzyme, papain, lysozyme) according to 4:2:3.5:0.5 (W1:W2:W3:W4), control the temperature at 40°C-50°C, stir After 2h-3h, the temperature is raised to 90°C-95°C, 0.5h (enzyme inac...

technical field

[0001] The invention relates to a treatment method for high-acidity black glucosamine production organic process waste liquid, in particular to a method for preparing high-activity compound organic fertilizer by using waste acid liquid of glucosamine hydrochloride. Background technique

[0002] Chitin is hydrolyzed with hydrochloric acid (31%) to prepare glucosamine hydrochloride (hereinafter referred to as glucosamine). In the domestic traditional production process, chitin is hydrolyzed once to extract glucosamine, and the yield of glucosamine is 45%-50%. The current advanced production process is secondary hydrolysis of chitin to extract glucosamine, and the yield of glucosamine is 50%-55%. The yield of glucosamine after the first hydrolysis is 40%-45%. After mother liquor reclaims hydrochloric acid, hydrolyze with hydrochloric acid (31%) for the second time, the yield of ammonia sugar is at 5%-10%, after mother liquor reclaims hydrochloric acid for the s...

Examples

Embodiment Construction

[0027] A detailed description will be given below of specific embodiments of the present invention.

[0028] 1. Glucosamine hydrochloride and waste acid solution formed by hydrolyzing commercial chitin (moisture ≤ 10%, ash content ≤ 10%) with hydrochloric acid (31%). The slurry after recovering the hydrochloric acid from the waste acid solution is then put into the reaction kettle and slowly added the lye containing potassium hydroxide (concentration 3%-5%) to neutralize the slurry to pH4.0-5.0. The amount of lye added is 0.5-1 times that of the slurry.

[0029] 2. Add the neutralizing solution to chitosan 0.5%-1% (W: V), [the degree of deacetylation (D.D) of chitosan is 70%-85%, and the molecular weight (Mw) is 50×10 4 -60×10 4 】After fully dissolved, add mixed enzymes (acid protease, cellulose 5 enzyme, papain, lysozyme) according to 4:2:3.5:0.5 (W1:W2:W3:W4), control the temperature at 40°C-50°C, stir After 2h-3h, the temperature is raised to 90°C-95°C, 0.5h (enzyme inac...