CN1467179A

CN1467179A - High-nitrogen organic fertilizer and production method thereof

Info

Publication number: CN1467179A
Application number: CNA02137922XA
Authority: CN
Inventors: 邵建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-09
Filing date: 2002-07-09
Publication date: 2004-01-14

Abstract

A high-N organic fertilizer is prepared from keratoprotein through hydrolyzing in alkaline condition and mixing it with acidic hydrolytic liquid of keratoprotein. Its advatnages are high content of organic nitrogen, high effect to increase the quality and quantity of crops, and low cost.

Description

A kind of high-nitrogen organic fertilizer and production method thereof

The life-time service of chemical fertilizer makes the fertility decline of soil, the agricultural product quality reduction, and nitrite content rises, in order to change this situation, the fertile soil plan that the national Ministry of Agriculture proposes, the organic matter of requirement increase soil, the fertilizer-preserving ability of raising soil.The corresponding food that enters trading market of having formulated in big city such as Beijing, Shanghai must reach nuisanceless and requirement green food.For this reason, the use of fertilizer becomes the key that guarantees the green food quality.But because fertilizer nitrogen content low (generally only being 2.0-3.0%), when taking agricultural product quality into account, output does not increase, and production cost raises.The present invention is a kind of high-nitrogen organic fertilizer, and organonitrogen content reaches 8-12%, be common fertilizer 4-5 doubly, solved the difficult problem of output at the bottom of the fertilizer high quality.

The present invention utilizes the depleted keratoprotein to be main raw material, in the soda acid mild hydrolysis and after produce.Keratoprotein is abundant in china natural resources, and various vegeto-animal hairs, angle, hoof all are good raw material.The crude protein content of keratoprotein reaches more than 80%, can not be utilized by plant absorbing without chemical treatment, and traditional method is that keratoprotein is become amino acid with 2 times acid hydrolysis.Though the product specific absorption height that this technology is produced, but in and spent acid need consume a large amount of alkali, generate inorganic salt simultaneously, then need be if separate the removal inorganic salt through operations such as concentrated, crystallization, separation, the production cost height, though the amino acid that generates is high-quality fertilizer, solubleness is big, is easy to run off in the paddy field.Advantage of the present invention, be with alkali with the keratoprotein mild hydrolysis, destroy in the keratoprotein-the S-S-key, make it to become and be easy to by the protein of microbiological degradation and polypeptides matter, the solubleness in water is little, stable performance is difficult for running off.Because the consumption of alkali is few, neutralization is again proteinic acidic hydrolysis liquid with acid, and the inorganic salt that the neutralization back generates are few, acidic hydrolysis liquid in and the time bring proteinic hydrolyzate into, organonitrogen is remained on more than 8%.For hydrolyzed solution is not brought into the deleterious inorganic salt of farm crop, protolysate alkali of the present invention is KOH, and acid is H ₂SO ₄Or H ₃PO ₄, catalyzer is ZnSO ₄7H ₂8O ₄, the neutralization back generates K ₂SO ₄And K ₂HPO ₄And zinc-amino acid chelate, this has effectively improved fertilizer available nutrient content as fine P, K fertilizer.

The present invention realizes like this

In the reactor of 2000L made of iron, add keratoprotein 1000Kg, spraying into concentration is the KOH solution 400-1000Kg of 5-15%, makes keratoprotein wetting, straight-through be steam heated to pressure and reach 0.25-0.5MPa, keep after 2-5 hour, decompression emptying is basic protein liquid.

Other gets the 1000Kg keratoprotein, adds in the 3000L enamel reactor, adds the H of 1500-2000Kg35-40% ₂SO ₄And 50-100KgZnSO ₄7H ₂O is heated to 100-120 ℃, hydrolysis 2-5 hour, is the acidic protein hydrolyzed solution.

The acidic protein hydrolyzed solution is stirred in the adding basic protein hydrolysis down, adjust pH value=6-7, be high-nitrogen organic fertilizer of the present invention.

Embodiment 1

In the iron reactor of 2000L, add useless pig hair 1000Kg, spray into concentration and be 10% KOH 800Kg, straight-throughly be steam heated to pressure and reach 0.5MPa, close straight-through steam valve, open passageway steam insulation pressurize after 3 hours, open blow-off valve, decompression emptying obtains intermediates A to normal pressure.

Get the useless pig hair of 1000Kg, add in the 3000L enamel reaction still, add the H of 1800Kg35% ₂SO ₄And 10KgZnSO ₄7H ₂O is heated to 115 ℃, and hydrolysis 4 hours obtains intermediates B.

Intermediates B is added among the intermediates A, regulate PH6-7, drying is product of the present invention.

Embodiment 2

Get useless chicken, drake feather 1000Kg in cement pit, be spilled into concentration and be 8% KOH500Kg, places and drop into after 1-2 days in the iron reactor of 2000L, straight-through to be steam heated to pressure be 0.25MPa, uses passageway steam maintenance emptying in 4 hours, is the alkaline hydrolysis albumin A.

Other gets the discarded chicken of 1000Kg, drake feather, adds in the 3000L enamel reaction still, adds 180Kg35%H ₂SO ₄With H ₃PO ₄Mixing acid (H wherein ₂SO ₄Be 20%, H ₃PO ₄Be 15%) in 115 ℃ of following heating hydrolysis be the acidic hydrolysis protein B in 5 hours.

B added regulate PH6-7 among the A, be product of the present invention.

Embodiment 3

In soaking compartment made of iron, adding concentration is 5% KOH2000Kg, adding 1000Kg cattle and sheep angle is soaked to take out after 5-10 days and is put into 2000L reactor made of iron, add soak solution 1000kg, be heated to pressure and be 0.5Mpa hydrolysis 4-5 and all till the dissolving, be the alkaline hydrolysis protein liquid until the cattle and sheep angle.

Other gets the useless feather of 100Kg and adds in the 3000L enamel reaction still adding 40%H ₂SO ₄180Kg and 10kg ZnSO ₄7H ₂O is heated to 115 ℃ of hydrolysis 5 hours, is the acidic protein hydrolyzed solution.

The acidic protein hydrolyzed solution is added the basic protein hydrolyzed solution be neutralized to PH=6-7, be product required for the present invention.

Claims

1, a kind of high-nitrogen organic fertilizer and production method thereof are to utilize keratoprotein to add in the acidic hydrolysis liquid of keratoprotein under alkaline condition after the hydrolysis again and the back drying is produced, and its product can use separately, also can with the composite use of other any fertilizer.

2, alkaline hydrolysis according to claim 1 is that keratoprotein is added KOH or the NaOH solution that hydrolysis kettle stirs into certain proportion and concentration, at normal pressure or add and depress that hydrolysis forms.

3, keratoprotein according to claim 2 can be chicken and duck hair, pig, cattle and sheep hair, people's hair wastes, cattle and sheep angle hoof and other keratoprotein.

4, the ratio of keratoprotein according to claim 2 and KOH (or NaOH) is 100: 2-15, the concentration of KOH (or NaOH) is 2-20%.

5, the alkaline hydrolysis temperature of keratoprotein according to claim 2 is 100-125 ℃, can ordinary-pressure hydrolysis, also can be in hydrolysis under the pressure, and hydrolysis pressure is 0.1-1.0MPa, hydrolysis time is regulated according to the concentration and the consumption of alkali.

6, the acidic hydrolysis of keratoprotein according to claim 1 is that keratoprotein is added enamel reaction still, adds the dilute sulphuric acid of 30-40%, and adds 5% ZnSO ₄7H ₂O makes catalyzer, produces after temperature is 100-120 ℃ of following hydrolysis 2-8 hour.

7, during acidic hydrolysis according to claim 6, the ratio of keratoprotein and concentrated hydrochloric acid or dilute sulphuric acid is 1: 1.2-2.0.

8, in the alkaline hydrolysis liquid of keratoprotein according to claim 1 and the acidic hydrolysis liquid and the time, control PH be that 5-8 gets final product.

9, according to the described drying means of claim, can be by spraying drying, also can utilize air stream drying, can also mix the back with other fertilizer and adopt other drying mode.