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Method for preparing biomechanical pulp and biomass compound fertilizer from leaf sheaths of wheat straw

A technology of mechanical pulp and biomass, applied in organic fertilizers, cellulose treatment with microorganisms/enzymes, nitrogen fertilizers, etc., can solve the problems of difficult to achieve high-efficiency utilization of by-products, unfavorable comprehensive high-value utilization of agricultural straws, etc.

Active Publication Date: 2021-05-18
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor found through research that the by-products produced by this method are difficult to achieve efficient utilization, which is not conducive to the comprehensive high-value utilization of agricultural straw

Method used

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  • Method for preparing biomechanical pulp and biomass compound fertilizer from leaf sheaths of wheat straw
  • Method for preparing biomechanical pulp and biomass compound fertilizer from leaf sheaths of wheat straw
  • Method for preparing biomechanical pulp and biomass compound fertilizer from leaf sheaths of wheat straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing biomechanical pulp and biomass compound fertilizer from wheat straw sheaths, the steps are as follows:

[0036] (1) The air-dried wheatgrass leaf sheath after physical selection and dedusting is cut into 3cm long standby raw materials.

[0037] (2) Put the spare raw materials into the normal temperature processor or reactor, and treat the wheat grass leaf sheath with warm water and alkaline compound enzyme according to the liquid ratio of 1:5. During the treatment, adjust the pH value with KOH to make the wheat grass leaf sheath The pH value of the water is 8, the treatment time is controlled at 90min, and the temperature is at 50°C. The alkaline biological enzyme is a compound enzyme of xylanase, cellulase and pectinase. The total dosage is: 50IU / mL, the enzyme activity ratio of xylanase, cellulase and pectinase is 3:1:1.

[0038] (3) After the wheat straw sheath reaches a certain degree of softening, take out the wheat straw sheath, and then u...

Embodiment 2

[0043] A method for preparing biomechanical pulp and biomass compound fertilizer from wheat straw sheaths, the steps are as follows:

[0044] (1) The air-dried wheatgrass leaf sheath after physical selection and dedusting is cut into 4cm long standby raw materials.

[0045] (2) Put the spare raw materials into a normal temperature processor or reactor, and treat the wheat grass leaf sheath with warm water and alkaline compound enzyme according to the liquid ratio of 1:4. During the treatment, adjust the pH value with KOH to make the wheat grass leaf sheath The pH value of the water is 9, the treatment time is controlled at 70min, and the temperature is 55°C. The alkaline biological enzyme is a compound enzyme of xylanase, cellulase and pectinase. The total dosage is: 40IU / mL , the enzyme activity ratio of xylanase, cellulase and pectinase is 3:2:1.

[0046] (3) When the wheatgrass sheath reaches a certain degree of softening, take out the wheatgrass sheath, and then use hot w...

Embodiment 3

[0051] A method for preparing biomechanical pulp and biomass compound fertilizer from wheat straw sheaths, the steps are as follows:

[0052] (1) The air-dried wheatgrass leaf sheath after physical selection and dedusting is cut into 5cm long standby raw materials.

[0053] (2) Put the spare raw materials into the normal temperature processor or reactor, and treat the wheat grass leaf sheath with warm water and alkaline compound enzyme according to the liquid ratio of 1:6. During the treatment, adjust the pH value with KOH to make the wheat grass leaf sheath The pH value of the water is 8, the treatment time is controlled at 60min, and the temperature is 50°C; the alkaline biological enzyme is a compound enzyme of xylanase, cellulase and pectinase, and the total dosage is: 40IU / mL , the enzyme activity ratio of xylanase, cellulase and pectinase is 2:1:1.

[0054] (3) When the wheat straw sheath reaches a certain degree of softening, take out the wheat grass leaf sheath, and t...

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Abstract

The invention discloses a method for preparing biological mechanical pulp and a biomass compound fertilizer from leaf sheaths of wheat straw. The method comprises the following steps: S1, cutting pretreated leaf sheaths of wheat straw into sections, and carrying out treatment under the action of warm water and an alkaline compound enzyme; S2, adding hot water into the wheat straw leaf sheaths treated in the step S1, adding KOH to adjust a pH value, and performing saturated softening treatment; S3, grinding the wheat straw leaf sheaths softened in the step S2 to prepare the biomechanical pulp; S4, performing evaporation and concentration treatment on the wastewater obtained after treatment by the warm water and the alkaline compound enzyme, wastewater obtained after the saturated softening treatment and washing water for pulping treatment by adopting a multi-effect evaporator so as to obtain residues, and recovering heat energy for the saturated softening treatment in S2; and S5, mixing the residues with rotten leaves which cannot be processed and used in the step S1 and adjusting acid to prepare the fertilizer. According to the method, the requirements of production of primary-color packaging paper and paper-based materials can be met, byproducts can be recycled to prepare the biomass compound fertilizer, emission of solid waste is greatly reduced, and meanwhile, high-value full utilization of the wheat straw leaf sheaths is achieved.

Description

technical field [0001] The invention belongs to the technical fields of papermaking technology and fertilizer making, and relates to a method for preparing biomechanical pulp and biomass compound fertilizer from wheat straw sheaths. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In the traditional papermaking process in the past, wheat straw was used as an important papermaking raw material, and the wheat straw leaf sheath in the wheat straw is often required to be removed as much as possible during the material preparation process. Hemicellulose, but very hard to beat. Specifically, because the fibers in the wheatgrass sheath are short, and the content of miscellaneous...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G5/20D21C5/00
CPCC05G3/00C05G5/20C05C11/00D21C5/005C05F11/00Y02P70/10
Inventor 吉兴香田中建陈嘉川王东兴马浩王强
Owner QILU UNIV OF TECH
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