CN-122012103-A - Drought-enduring biological crust accelerator and application thereof in sand fixation in subsidence area

CN122012103ACN 122012103 ACN122012103 ACN 122012103ACN-122012103-A

Abstract

The invention belongs to the technical field of ecological restoration of soil, and particularly relates to a drought-enduring biological crust accelerator and application thereof in sand fixation in a subsidence area. The drought-enduring biological crust accelerator comprises, by weight, 10-20 parts of domestic sludge, 10-20 parts of solidified blue algae and 20-60 parts of bionic fibers, wherein the solidified blue algae is obtained by carrying out microbial solidification treatment on blue algae, and the bionic fibers are cellulose graft copolymers prepared by polymerization of agricultural waste cellulose and biodegradable polymers. According to the invention, the drought-resistant biological crust accelerator is added into the existing artificial biological crust, so that the cohesiveness of the biological crust can be effectively promoted, the speed of the crust is improved, and the drought resistance is higher, thereby realizing the effective fixation effect on sanded soil in a subsidence area, simultaneously providing nutrient substances such as nitrogen, phosphorus, potassium and the like and decomposed organic matter particles for the soil, and having important significance for improving the sanded soil.

Inventors

WANG YI
LI QIANG
GUO YONGJIN
QIANG YIXIN
ZHANG KAI
WANG SHUNJIE

Assignees

国能神东煤炭集团有限责任公司
中国神华能源股份有限公司神东煤炭分公司
中国矿业大学(北京)

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The drought-enduring biological crust accelerator is characterized by comprising, by weight, 10-20 parts of domestic sludge, 10-20 parts of solidified blue algae and 20-60 parts of bionic fibers; the solidified blue algae is obtained by the blue algae through microbial solidification treatment; The bionic fiber is a cellulose graft copolymer prepared from agricultural waste cellulose and biodegradable polymers through polymerization reaction.
2. The method for preparing drought-enduring biological crust promoter according to claim 1, wherein the method comprises the steps of: pretreating agricultural waste to obtain cellulose suspension; dissolving a biodegradable polymer in a solvent to obtain a polymer solution; Mixing the cellulose suspension with a polymer solution, adding a hydrophilic monomer and an initiator for reaction, standing and filtering after the reaction is finished, and washing and drying the obtained solid product to obtain the bionic fiber; according to the weight portions, the obtained bionic fiber, domestic sludge and solidified blue algae are mixed and stirred uniformly to obtain the drought-enduring biological crust accelerator.
3. The method according to claim 2, wherein the agricultural waste comprises corn stalks, rice hulls, rice straw, wheat straw, cotton stalks, beanstalk, and stubble; the pretreatment includes pulverization and alkali treatment.
4. A method of producing according to claim 3, wherein the pulverization is cutting and pulverizing the raw material into particles; The alkali treatment is to adopt alkali solution with the mass concentration of 2-10% and react for 1-3 hours at 70-100 ℃; The alkali is selected from one or more of sodium hydroxide and potassium hydroxide.
5. The preparation method according to claim 2, wherein the biodegradable polymer is one or more selected from polylactic acid, polyvinylpyrrolidone, chitosan, polyvinyl alcohol, polyacrylamide, polyhydroxyalkanoate; the solvent is selected from one or more of water, hydrochloric acid, dichloromethane and N, N-dimethylformamide; The mass concentration of the polymer solution is 1-5wt%.
6. The method of preparation according to claim 2, characterized in that the cellulose suspension is mixed with the polymer solution in an amount of 1:5-10 by volume; The hydrophilic monomer is selected from one or more of N, N-dimethylaminoethyl acrylate, N-diethylaminoethyl acrylate, butanediol monoacrylate, tert-butylaminoethyl methacrylate, 2-ethoxyethyl acrylate, N-hexyl acrylate and hydroxypropyl methacrylate, and the addition amount of the hydrophilic monomer is 1-3 times of the mass of the polymer; the initiator is selected from one or more of dibenzoyl peroxide, azodiisobutyronitrile, potassium persulfate, ammonium persulfate and azodiisoheptonitrile, and the addition amount of the initiator is 0.2-0.5% of the mass of the hydrophilic monomer.
7. The preparation method of claim 2, wherein the solidified blue algae is prepared according to the following method: crushing blue algae, and then performing heat treatment to obtain blue algae slurry; and adding the biological bacteria starter into the blue algae slurry for fermentation, and drying after the fermentation is finished to obtain the solidified blue algae.
8. The method according to claim 7, wherein the heat treatment condition is 100-150 ℃ for 20-40min; The biological bacteria starter is composed of lactobacillus plantarum, bacillus subtilis and bacillus licheniformis; the inoculation proportion of the biological starter is 1-5%; The fermentation condition is that the temperature is 35-45 ℃ and the time is 12-18 hours.
9. The biological crust material is characterized by comprising the following raw material components in percentage by weight: (i) 80-90% of biological crust, and (Ii) The balance of the drought-enduring biological crust promoter according to claim 1 or the drought-enduring biological crust promoter prepared by the preparation method according to any one of claims 2 to 8; the biological crust is a mixture of artificially cultured algae crust and moss crust according to the mass ratio of 1:0.3-0.5.
10. The drought-enduring biological crust promoter according to claim 1, the drought-enduring biological crust promoter prepared by the preparation method according to one of claims 2 to 8 or the application of the biological crust material according to claim 9 in sand fixation in subsidence areas.

Description

Drought-enduring biological crust accelerator and application thereof in sand fixation in subsidence area Technical Field The invention belongs to the technical field of ecological restoration of soil, and particularly relates to a drought-enduring biological crust accelerator and application thereof in sand fixation in a subsidence area. Background The large-scale coal exploitation causes the coal base at the upstream and the upstream of the yellow river to have serious coal mining subsidence and derived ecological damage problems, and finally causes and aggravates the water and soil loss of the area, so that the contradiction between the coal exploitation at the upstream and the upstream of the yellow river and the water and soil conservation is increasingly prominent. The mining activities of coal have serious influence on the land and ecological environment of mining areas, especially in subsidence areas, the land damage degree is higher, the soil quality is poor, desertification is serious, and ecological restoration is difficult. The conventional sand fixation technology is found to have the problems of incapability of long-time maintenance, long plant growth period, high cost, easiness in causing secondary pollution and the like in the application process. Based on the limitations, researchers are forced to search for new technologies to develop researches on biological skinning, wind prevention and sand fixation. Biological crust is used as pioneer species for ecological restoration, has core functions of sand fixation, water retention, nitrogen fixation, carburetion, micro-environment improvement and the like, can reduce wind erosion in a gravity erosion prevention and control area, and can enhance the water retention and fertilizer retention capacity of soil in reclaimed lands, thereby forming a technical closed loop of erosion resistance, reclamation and ecological reinforcement. Therefore, the application effect evaluation of the biological crust in the ecological restoration of the sand erosion area is further developed, and the novel biological crust material research-inoculation technology-application effect integrated ecological utilization system is researched, so that the ecological restoration method is a research focus and a hot spot for promoting the high-quality, high-efficiency and ecological friendly development of the sand coal mining area ecological restoration. Therefore, aiming at the problems that the soil in the sand area is severely corroded by wind power and the water retention rate is low at present, research and development are carried out, and a novel biological skinning material which has good cohesiveness, strong planting property, high skinning speed, difficult falling and high drought resistance is screened out, so that the novel biological skinning material is one of the current research targets. Disclosure of Invention The invention aims to provide a drought-enduring biological crust accelerator and application thereof in sand fixation in a subsidence area, so that the drought-enduring biological crust accelerator has the advantages of chemical crust and biological crust, and has good sand fixation effect when used in the subsidence area. Therefore, the invention provides the following technical scheme. The first aspect of the invention provides a drought-enduring biological crust accelerator, which comprises, by weight, 10-20 parts of domestic sludge, 10-20 parts of solidified blue algae and 20-60 parts of bionic fibers; the solidified blue algae is obtained by the blue algae through microbial solidification treatment; The bionic fiber is a cellulose graft copolymer prepared from agricultural waste cellulose and biodegradable polymers through polymerization reaction. The second aspect of the invention provides a preparation method of a drought-enduring biological crust accelerator, which comprises the following steps: pretreating agricultural waste to obtain cellulose suspension; dissolving a biodegradable polymer in a solvent to obtain a polymer solution; Mixing the cellulose suspension with a polymer solution, adding a hydrophilic monomer and an initiator for reaction, standing and filtering after the reaction is finished, and washing and drying the obtained solid product to obtain the bionic fiber; according to the weight portions, the obtained bionic fiber, domestic sludge and solidified blue algae are mixed and stirred uniformly to obtain the drought-enduring biological crust accelerator. In a preferred embodiment of the present invention, the agricultural waste comprises corn stover, rice hulls, rice straw, wheat straw, cotton stalk, beanstalk, and stubble. In a preferred embodiment of the present invention, the pretreatment includes pulverization and alkali treatment. In a preferred embodiment of the invention, the comminution is cutting and comminuting the feedstock into particulate matter. In a preferred embodiment of the present invention, the alkali treat