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Method for preparing seedling bed by using modified biogas residue fibers

A technology for raising seedling trays and biogas residues, which is applied in the field of preparing seedling trays using modified biogas residue fibers, which can solve the problems of long time-consuming degradation and modification, difficulty in large-scale utilization, and high cost, and achieve good feasibility and high comprehensive utilization rate , little toxicity and pollution effect

Active Publication Date: 2017-07-25
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the physical method is relatively simple, but the effect is poor and the cost is high; the biological method is environmentally friendly, and it takes a long time to degrade and modify, and it is difficult to use it on a large scale; using a less polluting and environmentally friendly modifying agent to improve the fluidity of the biogas residue fiber It has a good development prospect, and the method that can effectively improve the material utilization of biogas residue fiber has not been reported yet.

Method used

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  • Method for preparing seedling bed by using modified biogas residue fibers
  • Method for preparing seedling bed by using modified biogas residue fibers
  • Method for preparing seedling bed by using modified biogas residue fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S1: Acetylation pretreatment of biogas residue fiber

[0036] The biogas residue fiber is naturally air-dried and pulverized to 20 mesh. Weigh 200g biogas residue fiber into a reactor containing 1000ml of toluene solvent, add 1200ml of acetyl chloride, and after uniformly stirring, add 8g of p-benzoic acid at a heating rate of 5℃ / Min. Raise temperature from 25℃ to 90℃, react for 6h, cool to 30℃~40℃, discharge the material, wash the material repeatedly with absolute ethanol and deionized water until it is neutral, put it in a blast drying box, 105±2℃ Bake to absolute dryness under the conditions to obtain acetylated modified biogas residue fiber A, and the grafting rate is calculated to be 58.39%.

[0037] S2: Preparation of biogas residue fiber seedling tray

[0038] 1000g of acetylated modified biogas residue fiber A, 500g of urea-formaldehyde prepolymer modified soybean protein binder (refer to the literature "Synthesis and Characterization of Soybean Protein Isolate Hydro...

Embodiment 2

[0042] S1: Acetylation pretreatment of biogas residue fiber

[0043] The biogas residue fiber (same as Example 1) was dried and pulverized to 80 mesh, and 400g of biogas residue fiber was weighed into a reaction kettle containing 1000ml of toluene solvent, 800ml of acetic anhydride was added, and after uniform stirring, 1.5g and 0.5 of p-benzoic acid were added. g sulfuric acid, heat up from 25°C to 140°C at a heating rate of 5°C / min, react for 0.5h, cool to 30°C~40°C, discharge the material, wash the material repeatedly with absolute ethanol and deionized water to neutrality, and place In a blast drying box, bake to absolute dryness at 105±2℃ to obtain acetylated modified biogas residue fiber B. The calculated grafting rate is 36.65%.

[0044] S2: Preparation of biogas residue fiber seedling tray

[0045] Combine 1000g of acetylated modified biogas residue fiber B, 3000g of urea-formaldehyde prepolymer modified soy protein binder, 80g of nano calcium carbonate (reinforcing filler),...

Embodiment 3

[0048] S1: Acetylation pretreatment of biogas residue fiber

[0049] The biogas residue fiber (same as Example 1) was dried and pulverized to 40 meshes. Weighed 300g biogas residue fiber into a reaction kettle containing 1000ml of toluene solvent, added 900ml of acetyl chloride, and after uniformly stirring, added 6g of p-benzoic acid. Rate 5℃ / min from 25℃ to 120℃, react for 3h, cool to 30℃~40℃, discharge, repeatedly wash with absolute ethanol and deionized water to neutrality, place in blast drying box, 105 Bake to absolute dryness at ±2℃ to obtain acetylated modified biogas residue fiber C. The calculated grafting rate is 72.77%.

[0050] S2: Preparation of biogas residue fiber seedling tray

[0051] Put 1000g of acetylated modified biogas residue fiber C, 1000g of urea-formaldehyde prepolymer modified soybean protein binder, 50g of titanium dioxide, 30g of Utopol, and 35g of liquid paraffin in a high-speed mixer at 55℃ at 380rpm Mix for 30 minutes at the rotating speed of the ma...

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Abstract

The invention discloses a method for preparing a seedling bed by using modified biogas residue fibers. The method comprises the steps of firstly, carrying out acetylation pretreatment on biogas residue fibers, then processing the pretreated biogas residue fibers together with a biomass adhesive, reinforcing filler, a curing agent and a demolding agent in a high-speed mixing process, and preparing the seedling bed containing the modified biogas residue fibers by means of compression molding. According to the method, biogas residue obtained by means of anaerobic fermentation is high in contents of lignin and cellulose having a crystal structure, is beneficial to acetylation modification and can effectively improve the fluidity of the biogas residue fibers, thus overcoming the defects that the traditional straw fibers are low in acetylation grafting rate and more in by-products; on the other hand, the biogas residue fibers contain higher content of nutrient elements such as nitrogen, phosphorus, potassium, calcium, magnesium and silicon, the discarded seedling bed containing the biogas residue fibers is easily decomposed by microorganisms, and the degraded products can be taken as fertilizer for promoting the growth of seedlings, so that the seedling bed is environmentally-friendly. Compared with a plastic seedling bed, the seedling bed product containing the biogas residue fibers is low in energy consumption, environmentally friendly, high in breathability and degradable, thus being easy to popularize.

Description

Technical field [0001] The invention relates to the technical field of preparation and application of seedling raising trays, in particular to a method for preparing seedling raising trays by using modified biogas residue fibers. Background technique [0002] Traditional seedling trays mainly use thermoplastics such as polyethylene or polyvinyl chloride as raw materials. Polyethylene or polyvinyl chloride are non-degradable materials. The discarded seedling trays have a long degradation cycle under natural conditions or can only be partially degraded. At the same time, the broken pieces of seedling trays are left in the soil after aging, and are not easy to decompose, resulting in soil degradation. If they fall into the water, they will pollute the water body and affect the water quality. If they are burned, they will easily produce excess toxic gases and pollute the air. The seedling trays are easy to cause serious "white pollution". Today, when environmental problems are becomi...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L89/00C08L23/06C08L91/06C08K3/26C08K3/28C08K3/22C08K5/3492C08H8/00A01G9/10
CPCA01G24/00C08H8/00C08K2201/011C08L89/00C08L97/02C08L2201/06C08L2205/03C08L2205/16C08L23/06C08K2003/265C08K3/28C08L91/06C08K2003/2241C08K5/3492
Inventor 孙恩惠黄红英夏腾飞武国峰杜静靳红梅孙金金叶小梅
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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