CN114752424A - Two-stage type municipal sludge and waste wood chip synergistic resource utilization method - Google Patents
Two-stage type municipal sludge and waste wood chip synergistic resource utilization method Download PDFInfo
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- CN114752424A CN114752424A CN202210407323.7A CN202210407323A CN114752424A CN 114752424 A CN114752424 A CN 114752424A CN 202210407323 A CN202210407323 A CN 202210407323A CN 114752424 A CN114752424 A CN 114752424A
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- 239000002023 wood Substances 0.000 title claims abstract description 55
- 239000002699 waste material Substances 0.000 title claims abstract description 43
- 239000010802 sludge Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000002195 synergetic effect Effects 0.000 title description 4
- 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 claims abstract description 24
- 239000004021 humic acid Substances 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000002028 Biomass Substances 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002808 molecular sieve Substances 0.000 claims description 4
- 229910000160 potassium phosphate Inorganic materials 0.000 claims description 4
- 235000011009 potassium phosphates Nutrition 0.000 claims description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- 239000011574 phosphorus Substances 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 235000015097 nutrients Nutrition 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 abstract description 2
- 239000003864 humus Substances 0.000 description 8
- 239000003337 fertilizer Substances 0.000 description 6
- 239000002361 compost Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000007269 microbial metabolism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- -1 old furniture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000004151 quinonyl group Chemical group 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/442—Wood or forestry waste
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
- C05F11/02—Other organic fertilisers from peat, brown coal, and similar vegetable deposits
-
- 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
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Ecology (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a two-stage municipal sludge and waste wood chip resource utilization method, which comprises the steps of firstly, improving the internal structure of waste wood chips or partially converting the waste wood chips into a precursor generated by humic acid through the first stage treatment of baking or acidolysis, then, mixing the municipal sludge and the wood chips according to the mass ratio of 1: 2-3, converting the municipal sludge and the wood chips into an artificial humic acid liquid organic fertilizer through hydrothermal humic reaction under the alkaline condition of pH of 10-11, simultaneously generating humic residues, and further pressing the humic acid liquid organic fertilizer into biomass granular fuel. Through the baking or acidolysis pretreatment of the first section, favorable conditions are provided for the humification reaction of the second section, the generation of artificial humic acid is promoted, the generated humic acid solution is rich in nitrogen, phosphorus and other nutrient elements, and the generated humic residue has a certain calorific value.
Description
Technical Field
The invention belongs to a method for recycling solid wastes in environmental engineering, and particularly relates to a two-stage municipal sludge and waste wood dust recycling method.
Background
With the accelerated promotion of the industrialization level, the discharge amount of municipal sewage is increased day by day, the discharge amount of the municipal sewage in China in 2010-2019 tends to increase year by year, the discharge amount of the municipal sewage in 2020 reaches 588 hundred million tons, and sludge is inevitably generated in large quantities as a byproduct of municipal sewage treatment. The sludge is rich in organic matters, nitrogen, phosphorus and the like, and is often called as a second resource. On the premise of realizing the stabilization and harmless treatment of the sludge, the resource utilization of the sludge needs to be further promoted. After the sludge innocent treatment meets the relevant standards, the sludge innocent treatment can be used for land improvement, barren land afforestation, nursery stock tending, landscaping, agricultural utilization and the like.
The waste wood chips are residues in the wood processing process, and along with the acceleration of urban development pace in recent years, a large amount of wood processing residues appear in the vigorous development of real estate and home decoration industries. According to the measurement and calculation, urban waste wood including old furniture, waste wood detached from old house reconstruction, disposable wood products, building engineering waste wood, old rotten wood and the like generates about 9000 ten thousand tons of waste wood every year, and accordingly, the resource utilization of the waste wood chips is imperative.
Humic acid is a main component of humus, has the effects of improving soil, enhancing fertilizer, stimulating growth and the like, and belongs to a green organic fertilizer. The humic acid contains rich functional groups such as carboxyl, phenolic hydroxyl, alcoholic hydroxyl, quinonyl and the like, and on one hand, the humic acid can form an organic metal complex or an adsorbate with heavy metal ions in the modes of adsorption, exchange, complexation and the like to realize passivation on the heavy metals; on one hand, active functional groups on the humic acid can form chelate with phosphate, so that the fixation of phosphate fertilizer is inhibited, and the biological effectiveness of phosphorus is improved. The generation of artificial humic acid comprises two forms of compost humus and hydrothermal humus, the compost humus is a humification process of organic matters under the action of microorganisms, the occupied area is large, the fertilizer efficiency is low, the composting time is long, in addition, odor is easily generated in the composting process, mosquitoes and the like are bred, and the problems limit the wide application of the compost humus. Different from compost humus, hydrothermal humus does not need the microbial metabolism, and most carbon does not directly combine through the metabolism and generates humic acid, and hydrothermal humus required time is shorter, takes up less land, is fit for high efficiency and prepares humic acid fertilizer. The organic matter content of the municipal sludge is low, and the yield of humic acid is low. Heavy metals in sludge have certain environmental risks, and the bioavailability of phosphorus is low, so that the resource utilization of the sludge is limited.
Disclosure of Invention
The invention aims to: the invention aims to provide an environment-friendly and efficient two-stage type municipal sludge and waste wood chip synergistic resource utilization method.
The technical scheme is as follows: the method comprises the following steps: through the first stage of baking or acidolysis, the municipal sludge and the waste wood chips are mixed according to the mass ratio of 1: 2-3, and the municipal sludge and the wood chips are converted into the artificial humic acid liquid organic fertilizer through hydrothermal humic reaction under the alkaline condition of pH 10-11, and meanwhile, humic residues are generated and further pressed into the biomass granular fuel.
Preferably, the waste wood chips are subjected to a first stage treatment by baking or acid hydrolysis.
Preferably, the baking atmosphere is air, the baking temperature is 150-200 ℃, and the baking time is 2.0-2.5 h.
Preferably, the acidolysis air pressure is 3.0-4.0 MPa, the acidolysis pH is 3.0-5.0, and the acidolysis time is 2.0-3.0 h.
Preferably, the mixing mass ratio of the municipal sludge to the waste wood chips is 1: 2-3.
Preferably, the waste wood chips are crushed and then pass through a 16-mesh molecular sieve, and the particle size of the wood chips is smaller than 1 mm.
Preferably, the municipal sludge is domestic sewage-derived sludge with a water content of 75-85%.
Preferably, the alkaline condition is pH adjusted by potassium phosphate, and the initial pH value is 10-11.
Preferably, the hydrothermal humic reaction temperature is 220-260 ℃, the pressure is 4-4.5 MPa, and the time is 18-24 h.
Preferably, the humic residues are pressed into the biomass granular fuel, the operating pressure is 8-10Tons, and the dwell time is 30 s.
The waste wood chips are rich in lignin, and more artificial humic acid can be generated after the hydrothermal humic reaction. The cooperative utilization of the municipal sludge and the waste wood chips can generate a large amount of artificial humic acid and can simultaneously realize the passivation of heavy metals and the etching enrichment of phosphorus elements. Based on the above, the resource utilization of the two-section municipal sludge and the waste wood chips is an ideal solid waste utilization method. The resource utilization of solid wastes is realized through two-stage treatment modes of baking or acidolysis and hydrothermal humic, wherein the baking or acidolysis pretreatment of the first stage improves the molecular structure of wood chips to generate humic acid precursor monosaccharides, furans, organic acids and the like, the alkaline hydrothermal humic of the second stage synthesizes artificial humic acid, and meanwhile, the residual humic residues are pressed into biomass granular fuel. Converting municipal sludge and waste wood chips into artificial humic acid liquid fertilizer by baking or acidolysis and hydrothermal humic two-stage treatment modes, further pressing generated humic residues into biomass granular fuel, and specifically relates to a two-stage municipal sludge and waste wood chips synergistic resource utilization method
Has the beneficial effects that: compared with the prior art, the invention has the following advantages and beneficial effects: according to the invention, through the first stage of baking or acidolysis pretreatment, favorable conditions are provided for the second stage of humification reaction, the generation of artificial humic acid is promoted, the generated humic acid solution is rich in nitrogen, phosphorus and other nutrient elements, the generated humic residue has a certain heat value, and the method is simple, practical, environment-friendly and efficient, and provides a scientific theoretical basis for the cooperative resource utilization of municipal sludge and waste wood chips.
Drawings
FIG. 1 is a technical roadmap for the present invention;
FIG. 2 shows the artificial humic acid liquid fertilizer, the humic residue and the biomass granular fuel prepared in the first example;
FIG. 3 shows the artificial humic acid liquid fertilizer, the humic residues and the biomass pellet fuel prepared in example two.
Detailed Description
The first embodiment is as follows:
(1) crushing waste wood chips, sieving the crushed waste wood chips with a 16-mesh molecular sieve, and continuously baking the crushed waste wood chips for 2 hours at 150 ℃;
(2) taking 20g of baked waste wood chips and 10g of municipal sludge with the water content of 80%, uniformly mixing, and adding into a 1000mL hydrothermal reaction kettle;
(3) the volume is determined to be 700mL by deionized water, the initial pH value is adjusted to 11 by potassium phosphate, the hydrothermal humic reaction temperature is set to 240 ℃, the reaction pressure is 4.2MPa, and the hydrothermal humic reaction time is 21 h;
(4) After the hydrothermal humic reaction is finished, cooling and centrifuging for separation, wherein the rotating speed of a centrifuge is 5000rpm/min, the centrifuging time is 15min, and respectively collecting a hydrothermal humic liquid organic fertilizer and humic residues;
(5) drying the humic residues, and keeping the humic residues under the pressure of 9Tons for 30 seconds to prepare the biomass granular fuel.
The second embodiment:
(1) crushing waste wood chips, and sieving with a 16-mesh molecular sieve;
(2) adding 20g of sieved waste wood chips into an acidolysis reaction kettle, setting the pressure to be 3.5MPa, carrying out acidolysis with the pH value of 4.0, and carrying out acidolysis for 2.5 h;
(3) uniformly mixing 10g of municipal sludge with the water content of 80% and acidolyzed waste wood chips, and adding the mixture into a hydrothermal reaction kettle with the volume of 1000 mL;
(4) the volume is fixed to 700mL by deionized water, the initial pH value is adjusted to 11 by potassium phosphate, the hydrothermal humic reaction temperature is set to 240 ℃, the reaction pressure is 4.2MPa, and the hydrothermal humic reaction time is 21 h;
(5) after the hydrothermal humic reaction is finished, cooling and centrifuging for separation, wherein the rotating speed of a centrifuge is 5000rpm/min, the centrifuging time is 15min, and respectively collecting a hydrothermal humic liquid organic fertilizer and humic residues;
(6) drying the humic residues, and keeping the humic residues under the pressure of 9Tons for 30 seconds to prepare the biomass granular fuel.
The hydrothermal humic liquids prepared in the first and second examples are coffee-colored, which shows that the humic substances are more contained in the hydrothermal humic liquids.
Claims (9)
1. A two-stage municipal sludge and waste wood chip resource utilization method is characterized in that in the first stage: carrying out baking or acidolysis pretreatment on waste wood chips, and carrying out a second stage: mixing municipal sludge and waste wood chips according to the mass ratio of 1: 2-3, performing hydrothermal humic reaction under the alkaline condition of pH 10-11, converting the municipal sludge and the wood chips into an artificial humic acid liquid organic fertilizer, generating humic residues at the same time, and further pressing into biomass granular fuel.
2. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the baking conditions are as follows: the baking atmosphere is air, the baking temperature is 150-200 ℃, and the baking time is 2.0-2.5 h.
3. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the acidolysis conditions are as follows: the pressure of the acidolysis air is 3.0-4.0 MPa, the pH value of the acidolysis is 3.0-5.0, and the acidolysis time is 2.0-3.0 h.
4. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the mixing mass ratio of the municipal sludge to the waste wood chips is 1: 2-3.
5. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the waste wood chips are treated by the following steps: after being crushed, the wood chips pass through a 16-mesh molecular sieve, and the particle size of the wood chips is smaller than 1 mm.
6. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the municipal sludge is domestic sewage-derived sludge with a water content of 75% -85%.
7. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, wherein the alkaline condition is pH adjusted by potassium phosphate, and the initial pH value is 10-11.
8. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, characterized in that: the hydrothermal humic reaction conditions are as follows: the temperature is 220-260 ℃, the pressure is 4-4.5 MPa, and the time is 18-24 h.
9. The two-stage municipal sludge and waste wood chip resource utilization method according to claim 1, characterized in that: pressing the humic residues into biomass granular fuel, wherein the specific parameters are as follows: the operating pressure is 8-10Tons, and the dwell time is 30 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210407323.7A CN114752424A (en) | 2022-04-18 | 2022-04-18 | Two-stage type municipal sludge and waste wood chip synergistic resource utilization method |
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| CN202210407323.7A CN114752424A (en) | 2022-04-18 | 2022-04-18 | Two-stage type municipal sludge and waste wood chip synergistic resource utilization method |
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| CN114752424A true CN114752424A (en) | 2022-07-15 |
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| CN202210407323.7A Pending CN114752424A (en) | 2022-04-18 | 2022-04-18 | Two-stage type municipal sludge and waste wood chip synergistic resource utilization method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116554496A (en) * | 2023-05-17 | 2023-08-08 | 东北农业大学 | Method for improving yield of artificial humic acid produced by biomass humic compound |
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-
2022
- 2022-04-18 CN CN202210407323.7A patent/CN114752424A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116554496A (en) * | 2023-05-17 | 2023-08-08 | 东北农业大学 | Method for improving yield of artificial humic acid produced by biomass humic compound |
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