CN117004404A - Soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid waste and microbial agent - Google Patents
Soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid waste and microbial agent Download PDFInfo
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- CN117004404A CN117004404A CN202310986288.3A CN202310986288A CN117004404A CN 117004404 A CN117004404 A CN 117004404A CN 202310986288 A CN202310986288 A CN 202310986288A CN 117004404 A CN117004404 A CN 117004404A
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- 239000002689 soil Substances 0.000 title claims abstract description 66
- 239000002910 solid waste Substances 0.000 title claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 29
- 230000006872 improvement Effects 0.000 title claims abstract description 23
- 230000000813 microbial effect Effects 0.000 title claims abstract description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 110
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000002893 slag Substances 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 239000010881 fly ash Substances 0.000 claims abstract description 30
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 30
- 239000010440 gypsum Substances 0.000 claims abstract description 30
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000010936 titanium Substances 0.000 claims abstract description 25
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 25
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 24
- 241000233866 Fungi Species 0.000 claims abstract description 20
- 239000003337 fertilizer Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000009264 composting Methods 0.000 claims abstract description 5
- 244000063299 Bacillus subtilis Species 0.000 claims abstract description 4
- 235000014469 Bacillus subtilis Nutrition 0.000 claims abstract description 4
- 241000193417 Brevibacillus laterosporus Species 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 238000012986 modification Methods 0.000 claims description 17
- 230000004048 modification Effects 0.000 claims description 17
- 239000002361 compost Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 240000000599 Lentinula edodes Species 0.000 claims description 5
- 238000000855 fermentation Methods 0.000 claims description 5
- 230000004151 fermentation Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 235000001715 Lentinula edodes Nutrition 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 150000003608 titanium Chemical class 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000011550 stock solution Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 2
- 238000005273 aeration Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 16
- 230000008635 plant growth Effects 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- 230000001580 bacterial effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 210000003608 fece Anatomy 0.000 abstract description 3
- 239000010871 livestock manure Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000009472 formulation Methods 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000051 modifying effect Effects 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000003516 soil conditioner Substances 0.000 description 3
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000035784 germination Effects 0.000 description 2
- 239000004021 humic acid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000186361 Actinobacteria <class> Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 241000668854 Howardia biclavis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 citric acid modified titanium Chemical class 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002068 microbial inoculum Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The application discloses a soil improvement restoration agent comprehensively utilizing industrial and agricultural solid waste and microbial agents, which relates to the technical field of soil restoration and consists of a finished product of biochar-fungus dreg pile fertilizer, an S fungus fertilizer and modified industrial solid waste in a mass ratio of 1:0.8:5, wherein the finished product of biochar-fungus dreg pile fertilizer is prepared by mixing and fermenting mushroom fungus dreg biochar and mushroom fungus dreg, the S fungus fertilizer is a composite fungus fertilizer mainly comprising bacillus subtilis and Brevibacillus laterosporus, and the modified industrial solid waste consists of steel slag, fly ash and titanium gypsum which are all modified by citric acid. According to the application, the industrial solid waste is modified by the citric acid with specific concentration, and then the finished product of the mixed biochar-bacterial dreg composting and the S bacterial manure with specific biochar content can effectively improve the physical and chemical properties of soil in a mining area, have obvious influence on plant growth, greatly reduce the use amount of microbial agents and reduce the production cost.
Description
Technical Field
The application relates to the technical field of soil remediation, in particular to a soil improvement and remediation agent for comprehensively utilizing industrial and agricultural solid wastes and microbial agents.
Background
In recent years, with the increase of the demand for natural resources, the mining scale is enlarged, so that a large amount of waste residues, waste stones and tailings not only occupy the land of a mining area, but also become a serious pollution source, and the ecological environment safety of the mining area is greatly threatened. In view of the characteristics that solid wastes accumulated in the mine open-air dumping site occupy land and are extremely easy to induce debris flow, heavy metals and other harmful substances to pollute, the problem of soil improvement of the dumping site is solved, and the problem of ecological reconstruction of mining areas at home and abroad is currently important. The domestic mine also increases the ecological reconstruction research strength of the dumping site. Mining area reclamation and ecological environment reconstruction are the major trends of mining economic development.
Aiming at ecological restoration of mining areas, comprehensive application of methods and principles of soil science, microbiology, botanic science, soil and water conservation science, materialology, environmental chemistry and ecology are considered, and the earth-discharging field of the Panzhihua vanadium-titanium magnetite mining areas has obvious representativeness in the soil of the same type of mining areas, so that the earth-discharging field of the Panzhihua vanadium-titanium magnetite mining areas is taken as a research area, and a practical technical scheme is provided for soil improvement and treatment of the same type of mining area reclamation areas. Firstly, analyzing physical, chemical and biological characteristics of soil; secondly, researching and developing a soil improvement material suitable for a soil discharge field of a Panzhihua vanadium-titanium magnetite mining area, analyzing technological parameters and improvement mechanisms, and constructing a soil improvement system according to the technological parameters and the improvement mechanisms; finally, combining an indoor simulation experiment with a field experiment, carrying out demonstration on a plot for vegetation recovery in a Panzhihua vanadium titano-magnetite dumping site, and verifying the reclamation effect of the soil improvement material. However, the existing soil conditioner is basically a microbial agent, has poor soil improvement effect on the earth-discharging field of the Panzhihua vanadium-titanium magnetite mining area, has high production cost and is difficult to realize large-area use. While China has abundant industrial and agricultural solid waste resources, if the soil conditioner suitable for mining areas can be prepared, the production cost of the soil conditioner is reduced, and the problem that industrial and agricultural solid waste is difficult to treat is solved.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid wastes and microbial agents, which solves the technical problems of poor improvement effect and high preparation cost of the existing soil improvement agent.
The technical scheme adopted by the application is as follows:
a soil improvement restoration agent comprehensively utilizing industrial and agricultural solid waste and microbial agents comprises a finished product of biochar-fungus dreg compost, an S-fungus dreg compost and modified industrial solid waste in a mass ratio of 1:0.8:5, wherein the finished product of biochar-fungus dreg compost is obtained by blending and fermenting mushroom fungus dreg biochar and mushroom fungus dreg, the S-fungus compost is a composite fungus fertilizer mainly comprising bacillus subtilis and Brevibacillus laterosporus, and the modified industrial solid waste comprises steel slag, fly ash and titanium gypsum which are all modified by citric acid.
Preferably, the preparation process of the mushroom residue biochar comprises the following steps: and (3) washing, drying and crushing the collected mushroom residues, putting the mushroom residues into a sealed porcelain crucible, heating to 500 ℃ by using a muffle furnace, preserving heat for 3 hours, cooling to room temperature, taking out a black sample, and grinding to obtain the mushroom residue biochar.
Further, the mass ratio of the mushroom dreg biochar to the mushroom dreg is 1:24.
Further, the blending fermentation process of the mushroom dreg biochar and the mushroom dreg is as follows: soaking the collected Lentinus Edodes residue in 4% NaOH solution for 24 hr, cleaning, filtering, and adding 10% diluted hydrochloric acidRegulating pH to 7.20+ -0.25, adding EM bacteria stock solution, fermenting, controlling water content to 60%, taking Lentinus Edodes fungus residue biochar, stirring, culturing in 35 deg.C constant temperature water tank, and culturing at 0.5 L.min -1 Aerating at a certain speed, and fermenting for 60 days to obtain the finished product of the biochar-bacterial dreg composting.
Preferably, the modification process of the steel slag is as follows: the liquid-solid ratio of the citric acid to the steel slag is 2:1, the oscillating reaction is carried out for 1h, then the standing is carried out for 30min, and the liquid-solid ratio is 4000 r.min -1 Is centrifuged for 5min at the speed of 65 ℃ to obtain the modified steel slag after filtering, washing to neutrality and finally drying at the temperature of 65 ℃, wherein the concentration of the citric acid is 0.5 mol.L -1 。
Further, the modification process of the fly ash comprises the following steps: the liquid-solid ratio of the citric acid to the fly ash is 2:1, the oscillating reaction is carried out for 1h, then the standing is carried out for 30min, and the liquid-solid ratio is 4000 r.min -1 Is centrifuged for 5min at the speed of 65 ℃ to obtain the modified fly ash after filtering, washing to neutrality and finally drying at the temperature of 65 ℃, wherein the concentration of the citric acid is 0.75mol.L -1 。
Further, the modification process of the titanium gypsum comprises the following steps: the liquid-solid ratio of the citric acid to the titanium gypsum is 2:1, the reaction is carried out for 1h by shaking, then the reaction is carried out for 30min, and the reaction is carried out at 4000 r.min -1 Is centrifuged for 5min at the speed of 5min, filtered, washed to be neutral, and finally dried at 65 ℃ to obtain the modified titanium gypsum, wherein the concentration of the citric acid is 1.0mol.L -1 。
In summary, compared with the prior art, the application has the following advantages and beneficial effects:
according to the application, the industrial solid waste is modified by the citric acid with specific concentration, and then the mixed biochar-bacterial dreg composting finished product with specific biochar content and the S bacterial fertilizer can effectively improve the physical and chemical properties of soil in a mining area, have obvious influence on plant growth, greatly reduce the use amount of microbial agents and reduce the production cost.
Drawings
FIG. 1 is a plot of the effect of the ratio of added biochar on total nitrogen content of the compost;
FIG. 2 is a plot of the effect of the ratio of added biochar on the humic acid content of the compost;
FIG. 3 is a plot showing the effect of the ratio of added biochar on total phosphorus content of the compost.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the application, i.e., the embodiments described are merely some, but not all, of the embodiments of the application.
The soil tested in the following examples of the present application was obtained from a mining area dump of Panzhihua city Zhu Gubao, sichuan province at 101℃45 '-101℃46' E,26℃34 '-26℃35' N. The average temperature of the flowers in the climbing flowers is 19.7-20.5 ℃, the sunshine is more, the solar radiation is strong, the average sunshine is 2754 hours, the temperature daily change is large, the four seasons are not clear, the rainfall is less and concentrated, the frost-free period is more than 300 days, the valley area is winter-free all the year round, extreme weather is rarely generated in the valley area, and the method is the area with the most abundant sunshine resources in Sichuan provinces. The landform types mainly include mountain, basin, hills and valley basin. The soil types are up to eleven, and dry red soil, red soil, yellow brown soil, zongzi soil and the like are included, wherein the red soil is the main natural soil with the most wide distribution. The Panxi area is an important construction of mine belts in China.
Example 1
The embodiment mainly explores the influence of the finished product of the biochar-fungus dreg composting prepared by different biochar ratios on soil, and all the experimental groups are different in biochar removal ratio and the rest conditions are consistent. The method comprises the following steps:
the Lentinus edodes residue is produced by organic fertilizer Co., ltd. And the EM microbial inoculum is produced by Henan Yi He Fu Zhi Techno Co., ltd. (the main strains are bacillus and actinomycetes).
Preparing biochar: the fungus dreg material is obtained from the collected fungus dreg, and is cleaned, dried, crushed and placed into a sealed porcelain crucible, the sealed porcelain crucible is heated to 500 ℃ by a muffle furnace for 3 hours, the fungus dreg material is cooled to room temperature, a black sample is taken out, and the black sample is ground, sieved by a 100-mesh sieve, and the finished product of the biological carbon is respectively collected and sealed into a dry sealing bag.
Co-fermenting fungus residues and biochar: soaking 125g of mushroom residue (dry weight) in 4% NaOH solution for 24 hr, washing, filtering, regulating pH to 7.20 (+ -0.25) with 10% diluted hydrochloric acid solution, adding 1mL of EM bacteria stock solution for fermentation, controlling water content to 60%, respectively taking 2%, 4%, 8% and 12% of mushroom residue biochar of dry weight, stirring, culturing in 35 deg.C constant temperature water tank, and culturing at 0.5 L.min -1 Aeration is performed at a rate of (2). Meanwhile, single bacterial dreg fermentation (CK) without adding biochar is arranged, and the other conditions are kept consistent.
Firstly, the fungus dreg and the biological carbon co-fermented product are analyzed from three factors of total nitrogen content of the compost, humic acid content of the compost and total phosphorus content of the compost, and related detection data are shown in figures 1-3, so that the comprehensive addition amount of 4% of biological carbon is the optimal addition ratio.
The fungus dreg and the biochar co-ferment are added into the tested soil, and the data related to the measured soil are shown in the table 1, so that the soil fertility parameter is obviously increased after the compost is added, and the addition of the biochar-compost has good effect of improving the soil property, and can well improve the local soil property for relatively barren soil of a dumping site, and the addition amount of 4% of the biochar is not much different from that of 8%, but the addition amount of 4% is more suitable from the aspect of cost.
TABLE 1 soil property Change after compost addition
Example 2
The effect of citric acid on the modification of industrial solid waste mixtures is discussed in this example. In each experimental group of the embodiment, the weight of the finished product of the biochar-fungus dreg stacking fertilizer is 1% of the weight of the soil, the weight of the S fungus fertilizer is 8% of the weight of the soil, and the weight of the industrial solid waste mixture is 5% of the weight of the soil. The S bacterial manure provided in the embodiment is a composite bacterial manure which is mainly sold in the market and mainly contains bacillus subtilis and Brevibacillus laterosporus.
1. Investigation of modification of Steel slag in Industrial solid waste mixtures (the remaining conditions are identical)
The tested steel slag is obtained from Panzhihua of Sichuan province and is produced by Panzhihua group Co. The tested steel slag is sealed and stored in a plastic package bag after being aired. In the experiment, the mixture was ground to 100 mesh nylon sieve and used. 0, 0.5, 1, 1.5, 2 mol.L -1 The citric acid of (2) is used for carrying out acid modification on the steel slag. The liquid is as follows: the solid ratio is 2:1, namely 40mL of citric acid reacts with 20g of steel slag, the mixture is evenly placed and oscillated for 1h, and the mixture is kept stand for 30min. Then at 4000 r.min -1 Is centrifuged for 5min, filtered, washed to be neutral and dried at 65 ℃ for standby.
The obtained modified steel slag is applied to the soil to be tested, and the citric acid modified steel slag has good effect of modifying the steel slag through analysis of physical and chemical properties of the soil and analysis of plant index data, so that the pH value of the steel slag can be reduced, and the Eh of the steel slag can be increased. After the modified steel slag is applied into the soil, the modified steel slag has an influence on the pH value, quick-acting potassium, available phosphorus, total phosphorus and the like of the soil, and has positive influence on various indexes of plants such as germination rate, plant height and the like. From the above results and comprehensive consideration, 0.5 mol.L -1 The effect of the citric acid modified steel slag is best.
2. Investigation of modification of fly ash in Industrial solid waste mixtures (the remaining conditions are identical)
The tested fly ash was from the Shangshou county, ming of mineral products processing Co. The tested steel slag is sealed and stored in a plastic package bag after being aired. In the experiment, the mixture was ground to 100 mesh nylon sieve and used. 0, 0.5, 1, 1.5, 2 mol.L -1 The citric acid of (2) is used for carrying out acid modification on the steel fly ash slag. The liquid is as follows: the solid ratio is 2:1, namely 40mL of citric acid reacts with 20g of fly ash, and the mixture is uniformly placed and oscillated for 1h and is kept stand for 30min. Then at 4000 r.min -1 Is centrifuged for 5min, filtered, washed to be neutral and dried at 65 ℃.
Applying the obtained modified fly ash to testThe soil, through the analysis of the physical and chemical properties of the soil and the analysis of plant index data, the citric acid has a good modifying effect on the fly ash, so that the pH value of the fly ash can be reduced, and the Eh of the fly ash can be increased. After the modified fly ash is applied into soil, the modified fly ash has influence on the pH value, quick-acting potassium, available phosphorus, total phosphorus and the like of the soil, and has positive influence on various indexes of plants such as germination rate, plant height and the like. From the above results and comprehensively considering, 0.75mol.L -1 The citric acid modified fly ash has the best effect.
3. Investigation of modification of titanium gypsum in Industrial solid waste mixtures (the remaining conditions are identical)
The titanium gypsum to be tested is obtained from Panzhihua of Sichuan province and is produced by Panzhihua of Sichuan province. And (5) airing the titanium gypsum to be tested, and sealing and storing in a plastic package bag. When the experiment was performed, it was ground to pass through a 100 mesh nylon screen and then used. The pH value of the titanium gypsum is 7.33, and the material is alkalescent. The oxidation-reduction potential (Eh) value was 235mV. The titanium gypsum is subjected to acid modification by using 0, 0.5, 1, 1.5 and 2mol/L citric acid. The liquid is as follows: the solid ratio is 2:1, namely 40mL of citric acid and 20g of titanium gypsum are reacted and are evenly placed, and the mixture is oscillated for 1h and is placed for 30min. Centrifuging at 4000r/min for 5min, filtering, washing to neutrality, and oven drying at 65deg.C.
Applying the obtained modified titanium gypsum to tested soil, and analyzing physical and chemical properties of the soil: after the citric acid is used for modifying the titanium gypsum, the Eh value of the modified titanium gypsum is not changed basically, but the pH value is changed firstly, then, the pH value is increased and kept stable. In particular, after the titanium gypsum is modified by 1mol/L citric acid concentration, the pH value is low, and from the analysis of plant index data, 1.0mol -1 The effect of the citric acid modified titanium gypsum is good.
4. The influence of the proportion of each component in the modified industrial solid waste mixture is explored
Proportioning conditions of each experimental group: f1, F2, F3, F4 and F5 are respectively titanium gypsum: steel slag: the mass ratio of the fly ash is 1:1:1, 1:1:3, 1:1:5, 1:1:7 and 1:1:9; t2, T3, T4 and T5 are fly ash respectively: steel slag: titanium gypsum mass ratio is 1:1:3, 1:1:5, 1:1:7 and 1:1:9; g2, G3, G4 and G5 are fly ash respectively: titanium gypsum: the mass ratio of the steel slag is 1:1:3, 1:1:5 and 1:1:7, the influence of different proportions on the basic physicochemical properties of soil is shown in table 2, and the influence of different proportions on plant growth is shown in table 3:
TABLE 2 influence of different modified formulations on the basic physicochemical Properties of soil
As shown in Table 2, when the proportion of titanium gypsum and steel slag is constant, the mass percentage of fly ash in the industrial solid waste mixture is 60% (1:1:3), and the indexes are good; when the proportion of the fly ash and the steel slag is constant, the mass percentage of the titanium gypsum in the industrial solid waste mixture is 77.8 percent (1:1:7), and the indexes are better; when the ratio of the fly ash to the titanium gypsum is constant, the indexes are better when the mass percentage of the steel slag in the industrial solid waste mixture is 77.8 percent (1:1:7).
TABLE 3 influence of different modified formulations ratios on plant growth
As can be seen from Table 3, the effect of different proportions on plant growth is slightly different from the effect of different proportions on the basic physicochemical properties of soil, but the comprehensive performance of G4 (titanium gypsum: steel slag: fly ash mass ratio is 1:7:1) is better.
5. The influence of non-added citric acid or non-advanced modification of citric acid (when in use, citric acid is directly mixed with each component) is investigated
Proportioning conditions of each experimental group: f1, F2, F3, F4 and F5 are respectively titanium gypsum: steel slag: the mass ratio of the fly ash is 1:1:1, 1:1:3, 1:1:5, 1:1:7 and 1:1:9; t2, T3, T4 and T5 are fly ash respectively: steel slag: titanium gypsum mass ratio is 1:1:3, 1:1:5, 1:1:7 and 1:1:9; g2, G3, G4 and G5 are fly ash respectively: titanium gypsum: the mass ratio of the steel slag is 1:1:3, 1:1:5 and 1:1:7.
The influences of different unmodified preparation ratios without adding citric acid on the basic physical and chemical properties of soil and the plant growth are shown in tables 4 and 5 respectively, and when the preparation is used, the influences of different ratios of directly mixing citric acid with each component on the basic physical and chemical properties of soil and the plant growth are shown in tables 6 and 7 respectively:
TABLE 4 influence of different unmodified formulation ratios on the basic physicochemical Properties of soil
TABLE 5 influence of different unmodified formulation ratios on plant growth
TABLE 6 influence of formulation without advanced modification on basic physicochemical Properties of soil
TABLE 7 influence of formulation without advanced modification on plant growth
The comparison of the data in each group of tables 4 to 7 with the data in tables 2 and 3 shows that citric acid modifies each component in the industrial solid waste mixture in advance, and has more obvious effect on the comprehensive influence on the basic physicochemical properties of soil and plant growth.
The above examples merely illustrate specific embodiments of the application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it is possible for a person skilled in the art to make several variants and modifications without departing from the technical idea of the application, which fall within the scope of protection of the application.
Claims (7)
1. The soil improvement restoration agent is characterized by comprising a finished product of biochar-fungus dreg compost, an S fungus fertilizer and modified industrial solid waste in a mass ratio of 1:0.8:5, wherein the finished product of biochar-fungus dreg compost is obtained by blending and fermenting mushroom fungus dreg biochar and mushroom fungus dreg, the S fungus fertilizer is a composite fungus fertilizer mainly comprising bacillus subtilis and Brevibacillus laterosporus, and the modified industrial solid waste comprises steel slag, fly ash and titanium gypsum which are all modified by citric acid.
2. The soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid wastes and microbial agents according to claim 1, wherein the preparation process of the mushroom residue biochar is as follows: and (3) washing, drying and crushing the collected mushroom residues, putting the mushroom residues into a sealed porcelain crucible, heating to 500 ℃ by using a muffle furnace, preserving heat for 3 hours, cooling to room temperature, taking out a black sample, and grinding to obtain the mushroom residue biochar.
3. The soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid wastes and microbial agents according to claim 2, wherein the mass ratio of the mushroom residue biochar to the mushroom residue is 1:24.
4. The soil improvement restoration agent comprehensively utilizing industrial and agricultural solid waste and microbial agents as set forth in claim 2, wherein the blending fermentation process of the mushroom residue biochar and the mushroom residue is as follows: soaking the collected Lentinus Edodes residue in 4% NaOH solution for 24 hr, cleaning, filtering, adjusting pH to 7.20+ -0.25 with 10% diluted hydrochloric acid solution, adding EM bacteria stock solution for fermentation, controlling water content to 60%, collecting Lentinus Edodes residue biochar, stirring, culturing in 35 deg.C constant temperature water tank, and culturing at 0.5 L.min -1 Aeration is carried out at the rate of (2) for 60 daysThe finished product of the biochar-bacterial dreg composting can be obtained.
5. The soil improvement restoration agent for comprehensively utilizing industrial and agricultural solid wastes and microbial agents according to claim 1, wherein the modification process of the steel slag is as follows: the liquid-solid ratio of the citric acid to the steel slag is 2:1, the oscillating reaction is carried out for 1h, then the standing is carried out for 30min, and the liquid-solid ratio is 4000 r.min -1 Is centrifuged for 5min at the speed of 65 ℃ to obtain the modified steel slag after filtering, washing to neutrality and finally drying at the temperature of 65 ℃, wherein the concentration of the citric acid is 0.5 mol.L -1 。
6. The soil improvement restoration agent comprehensively utilizing industrial and agricultural solid wastes and microbial agents according to claim 5, wherein the modification process of the fly ash is as follows: the liquid-solid ratio of the citric acid to the fly ash is 2:1, the oscillating reaction is carried out for 1h, then the standing is carried out for 30min, and the liquid-solid ratio is 4000 r.min -1 Is centrifuged for 5min at the speed of 65 ℃ to obtain the modified fly ash after filtering, washing to neutrality and finally drying at the temperature of 65 ℃, wherein the concentration of the citric acid is 0.75mol.L -1 。
7. The soil improvement restoration agent comprehensively utilizing industrial and agricultural solid wastes and microbial agents according to claim 6, wherein the modification process of the titanium gypsum is as follows: the liquid-solid ratio of the citric acid to the titanium gypsum is 2:1, the reaction is carried out for 1h by shaking, then the reaction is carried out for 30min, and the reaction is carried out at 4000 r.min -1 Is centrifuged for 5min at the speed of 5min, filtered, washed to be neutral, and finally dried at 65 ℃ to obtain the modified titanium gypsum, wherein the concentration of the citric acid is 1.0mol.L -1 。
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