Method for preparing degradable mulch by reusing organic waste residues of biomass

A technology for organic waste residue and plastic film degradation, applied in organic fertilizers, chemical instruments and methods, applications, etc., can solve problems such as imbalance of soil flora, difficulty in controlling fermentation conditions, pollution of harmful fungi, etc., to achieve the purpose of inhibiting the growth of weeds, The effect of solving bacterial pollution and moderate degradation cycle

Inactive Publication Date: 2010-05-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the problems of long fermentation period and difficult control of fermentation conditions in the preparation of biodegradable mulch by reusing the above waste residues, the main pro...

Method used

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  • Method for preparing degradable mulch by reusing organic waste residues of biomass
  • Method for preparing degradable mulch by reusing organic waste residues of biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 50g of soy sauce crushed to 20 meshes, soak with 5% ammonia water at a mass concentration of 1:1, and soak at 10°C for 3 days, neutralize nitric acid and humic acid to neutrality, then add 5mL of glycerol, and 5mL alcohol, 1.8g urea, mixed with 4g calcium carbonate, 1g Gai Caoneng, 1.15g dimethoate, mix quickly, stir at 10°C and keep warm for 60 minutes, add 500mL hot water to mix evenly, dilute and spray on the soil surface . The yield increase rate of pakchoi planting test was 23%, and the degradation period was 8 months.

Embodiment 2

[0034] Take 1 kg of waste mycelia from citric acid fermentation that has been crushed to 300 mesh, use 0.1% calcium hydroxide solution with a mass concentration of 0.1%, solid-to-liquid mass ratio 1:30, keep warm at 40°C for 6 hours, neutralize hydrochloric acid to neutrality, and then add poly Acrylamide 0.3kg, gelatin 0.2kg, pregelatinized starch 0.6kg, supplemented with plasticizer dibutyl phthalate 0.11kg, stirred and kept at 100°C for 15 minutes, cast on iron plate, at 50°C Dry to form a degradable mulch film with an average film thickness of 0.35 mm. The yield increase rate of pakchoi planting test was 18%, and the degradation period was 7 months.

Embodiment 3

[0036] Take 2 kg of stevia rebaudiana slag crushed to 100 mesh, soak it with 1% potassium hydroxide solution with a mass concentration of 1:10, cook it at 120°C for 5 minutes, neutralize it with ammonium sulfate and humic acid, add 0.2kg of polyglycolic acid, 0.3kg of carboxymethyl cellulose, 0.2kg of starch, mixed with 0.1kg of clay, 0.04kg of ferrous sulfate fertilizer, mixed quickly and kept at 120°C for 5 minutes, added 2L of hot water and mixed evenly Then dilute and spray on the soil surface. The yield increase rate of pakchoi planting test was 19%, and the degradation period was 8 months.

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Abstract

The invention discloses a method for preparing degradable agricultural mulches by reusing organic waste residues of biomass, which can be widely used for preparing biodegradable nutritional type water-retention mulches by recycling the by-product residues in the fermentation brewing industry and the sugar industry. In the process, low-concentration alkali liquor is mainly used for processing the waste residues, specified neutralizing agents are used for neutralizing the fertilizers such as N, P, K and the like required for growing the plants which are generated and auxiliary film-forming agents, plasticizers and the like are used for preparing mulch stock solution, or casting or diluting or spraying is carried out. The mulch is low in cost and convenient to operate, such substances as pesticides, weedicides, trace fertilizers and the like can be added to the mulch according to the requirements of different crops, and the mulch not only has the effects of heat preservation, moisture preservation and fertilizer betterment but also has moderate degradation period. The degradation rate of the ground mulch reaches 55-70% after 4 months and almost reaches 100% after about 8 months.

Description

technical field [0001] The invention relates to a method for preparing biodegradable agricultural mulch by reusing biomass organic waste, in particular for the comprehensive reuse of by-product residues in fermentation brewing industry and sugar industry to prepare biodegradable mulch, which belongs to the application of agricultural production field. Background technique [0002] Mulch film: the ground covering film, usually transparent or black PE (polyethylene) or PVC (polyvinyl chloride) film, used for ground covering to increase soil temperature, maintain soil moisture, maintain soil structure, and prevent pests from invading crops and certain Diseases caused by some microorganisms, etc., have the function of promoting plant growth. However, the degradation time of this kind of plastic film is as long as 200 to 300 years. With the extensive application of this non-degradable plastic film, its residual film will accumulate in the soil more and more, which will reduce th...

Claims

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Application Information

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IPC IPC(8): C08L99/00C08L1/00C08L97/00C08K5/053C08K5/12C08K5/1515C08K3/26C08K3/34C08K3/30C09K17/52A01G13/02
CPCY02A40/28
Inventor 苏海佳石蕾
Owner BEIJING UNIV OF CHEM TECH
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