CN113880379A - Composite bottom mud modifier and production process thereof - Google Patents
Composite bottom mud modifier and production process thereof Download PDFInfo
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- CN113880379A CN113880379A CN202111279266.0A CN202111279266A CN113880379A CN 113880379 A CN113880379 A CN 113880379A CN 202111279266 A CN202111279266 A CN 202111279266A CN 113880379 A CN113880379 A CN 113880379A
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- 239000002131 composite material Substances 0.000 title claims abstract description 80
- 239000003607 modifier Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002068 microbial inoculum Substances 0.000 claims abstract description 55
- 239000000843 powder Substances 0.000 claims abstract description 43
- 239000004343 Calcium peroxide Substances 0.000 claims abstract description 32
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims abstract description 32
- 235000019402 calcium peroxide Nutrition 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 32
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 31
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910001603 clinoptilolite Inorganic materials 0.000 claims abstract description 31
- 239000006247 magnetic powder Substances 0.000 claims abstract description 31
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 31
- 239000011734 sodium Substances 0.000 claims abstract description 31
- 239000004575 stone Substances 0.000 claims abstract description 31
- 241000894006 Bacteria Species 0.000 claims abstract description 26
- 241000361919 Metaphire sieboldi Species 0.000 claims abstract description 24
- 229920005551 calcium lignosulfonate Polymers 0.000 claims abstract description 15
- 239000001814 pectin Substances 0.000 claims description 61
- 229920001277 pectin Polymers 0.000 claims description 61
- 235000010987 pectin Nutrition 0.000 claims description 61
- 239000000243 solution Substances 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000003756 stirring Methods 0.000 claims description 31
- 229920001661 Chitosan Polymers 0.000 claims description 22
- IJRKANNOPXMZSG-SSPAHAAFSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanal Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O.OC(=O)CC(O)(C(O)=O)CC(O)=O IJRKANNOPXMZSG-SSPAHAAFSA-N 0.000 claims description 19
- 239000013049 sediment Substances 0.000 claims description 18
- 239000004094 surface-active agent Substances 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 240000008042 Zea mays Species 0.000 claims description 16
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 16
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 16
- 235000005822 corn Nutrition 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 13
- 230000032050 esterification Effects 0.000 claims description 12
- 238000005886 esterification reaction Methods 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 244000063299 Bacillus subtilis Species 0.000 claims description 7
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 7
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims description 7
- 210000003608 fece Anatomy 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- 241000589344 Methylomonas Species 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000005909 Kieselgur Substances 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 244000005700 microbiome Species 0.000 abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 4
- 244000052616 bacterial pathogen Species 0.000 abstract description 4
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 18
- 229920001817 Agar Polymers 0.000 description 10
- 239000008272 agar Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 239000010802 sludge Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000008103 glucose Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000004382 Amylase Substances 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000589236 Gluconobacter Species 0.000 description 1
- 241000186660 Lactobacillus Species 0.000 description 1
- 102000004882 Lipase Human genes 0.000 description 1
- 239000004367 Lipase Substances 0.000 description 1
- 108090001060 Lipase Proteins 0.000 description 1
- 108091005804 Peptidases Proteins 0.000 description 1
- 239000004365 Protease Substances 0.000 description 1
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000006473 carboxylation reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229940039696 lactobacillus Drugs 0.000 description 1
- 235000019421 lipase Nutrition 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 235000019419 proteases Nutrition 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a composite bottom mud modifier and a production process thereof, wherein the composite bottom mud modifier comprises the following raw materials in parts by weight: 10-30 parts of calcium peroxide, 1-3 parts of sodium ferrate, 2-8 parts of medical stone, 0.1-0.3 part of magnetic powder, 2-10 parts of clinoptilolite powder, 5-10 parts of aluminum oxide, 2-5 parts of composite microbial inoculum, 2-6 parts of calcium lignosulfonate and 2-3 parts of earthworm excrement, wherein the produced modifying agent is added into the bottom mud, can oxidize the bottom mud to change organic matters into inorganic matters, reduce the emission of ammonia gas and methane gas in the bottom mud, and can inhibit the growth and propagation of harmful microorganisms such as harmful bacteria, pathogenic bacteria and the like, and can avoid secondary pollution to the environment in the bottom mud repairing process.
Description
Technical Field
The invention belongs to the field of bottom sediment remediation, and particularly relates to a composite bottom sediment modifier and a production process thereof.
Background
In a natural water ecosystem, the quality of bottom mud plays an important role in a water body. The bottom sludge is in an anaerobic environment, and the produced fermentation gases such as methane, hydrogen sulfide and the like carry the bottom sludge to return to be dissolved in the water body, thereby influencing the water quality of the water body. The decay reaction of the bottom mud generates certain interference to the living environment of the benthos, and influences the diversity of the benthos. The bottom mud has the repairing measures of adding a biodegradation agent and a chemical agent, mechanically dredging and the like, and has in-situ repair and ex-situ repair. The biological degradation agent gradually degrades and converts organic matters in the bottom mud by a biological method. The chemical agent utilizes the oxidizability of the agent to quickly control the bottom mud, but can generate secondary chemical pollution to the environment. Mechanical dredging, directly removing polluted bottom mud, and having great influence on the aquatic ecological environment.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite bottom mud modifier and a production process thereof.
The technical scheme of the invention is realized as follows:
a composite bottom mud modifier comprises the following raw materials in parts by weight:
10-30 parts of calcium peroxide, 1-3 parts of sodium ferrate, 2-8 parts of medical stone, 0.1-0.3 part of magnetic powder, 2-10 parts of clinoptilolite powder, 5-10 parts of aluminum oxide, 2-5 parts of composite microbial inoculum, 2-6 parts of calcium lignosulphonate and 2-3 parts of earthworm excrement.
Further, the feed comprises the following raw materials in parts by weight:
20 parts of calcium peroxide, 2 parts of sodium ferrate, 5 parts of medical stone, 0.2 part of magnetic powder, 6 parts of clinoptilolite powder, 8 parts of aluminum oxide, 3 parts of composite microbial inoculum, 4 parts of calcium lignosulphonate and 2.4 parts of earthworm excrement.
Further, the compound microbial inoculum comprises raw material bacteria, water and a carrier, wherein the raw material bacteria comprise: methylomonas (1-3). times.109cfu/g, Bacillus subtilis (5-10) x 109cfu/g and yeast (5-10). times.108cfu/g。
Furthermore, the water content in the composite microbial inoculum is 5-10%.
Furthermore, the carrier of the composite microbial inoculum comprises bran, corncobs and diatomite according to the mass ratio of (0.5-1) to (0.1-0.2).
Further, the preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier for later use;
dispersing raw material bacteria in agar-surfactant water to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 2-3h, and then drying at low temperature of 5 ℃ with the water content controlled at 2% -6% to obtain the composite microbial inoculum.
Furthermore, the size of the bran is 0.2-0.3mm, the size of the corncob is 1-3mm, and the size of the diatomite is 1-5 μm.
The invention also provides a production process of the composite bottom mud modifier, which comprises the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 5-10h, adding a chitosan aqueous solution, stirring for 1-2h, and adjusting the pH value to be neutral;
2) adding the complex microbial inoculum and the earthworm feces into the step 1), uniformly stirring, adding a pectin solution, and stirring for 1-2 h;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain the composite bottom mud modifier.
Further, the pectin comprises low ester pectin and high ester pectin, and the mass ratio of the low ester pectin to the high ester pectin is (2-3) to (0.6-1)
Furthermore, the esterification degree of the high-ester pectin is 10-20%, and the esterification degree of the low-ester pectin is 60-70%.
The invention discloses a composite bottom mud modifier and a production process thereof, wherein the composite bottom mud modifier comprises the following raw materials in parts by weight: 10-30 parts of calcium peroxide, 1-3 parts of sodium ferrate, 2-8 parts of medical stone, 0.1-0.3 part of magnetic powder, 2-10 parts of clinoptilolite powder, 5-10 parts of aluminum oxide, 2-5 parts of composite microbial inoculum, 2-6 parts of calcium lignosulfonate and 2-3 parts of earthworm excrement, wherein the produced modifying agent is added into the bottom mud, can oxidize the bottom mud to change organic matters into inorganic matters, reduce the emission of ammonia gas and methane gas in the bottom mud, and can inhibit the growth and propagation of harmful microorganisms such as harmful bacteria, pathogenic bacteria and the like, and can avoid secondary pollution to the environment in the bottom mud repairing process.
Detailed Description
For better understanding of the essence of the present invention, the following embodiments of the present invention are given only for illustrating how the present invention can be carried into effect and not for limiting the present invention to be carried into effect only by the following embodiments, and the modifications, substitutions and structural modifications of the present invention are made on the basis of understanding the technical solution of the present invention and the scope of the present invention is covered by the claims and the equivalents thereof.
A composite bottom mud modifier comprises the following raw materials in parts by weight:
10-30 parts of calcium peroxide, 1-3 parts of sodium ferrate, 2-8 parts of medical stone, 0.1-0.3 part of magnetic powder, 2-10 parts of clinoptilolite powder, 5-10 parts of aluminum oxide, 2-5 parts of composite microbial inoculum, 2-6 parts of calcium lignosulfonate, 2-3 parts of earthworm excrement and 20-30 parts of corn straw powder.
The calcium peroxide can slowly release oxygen and improve the anoxic environment of the bottom sludge, and the generated calcium hydroxide can inhibit the decomposition reaction of the bottom sludge after the oxygen is released. In the invention, the weight portion of the calcium peroxide is 10-30 portions; preferably, the weight part of the calcium peroxide is 20 parts. Wherein the calcium peroxide has a size of.
The sodium ferrate quickly oxidizes the bottom mud, so that organic matters are changed into inorganic matters, the anaerobic environment is destroyed, and the generation of fermentation gas is reduced. In the invention, the weight portion of the sodium ferrate is 1 to 3 portions; preferably, the weight part of the sodium ferrate is 2 parts.
The medical stone provides trace elements for bottom sediment microorganisms and enhances the activity of the microorganisms. In the invention, the medical stone is 2 to 8 weight parts; preferably, the medical stone is 5 parts by weight.
The magnetic powder improves the activity of microorganisms. In the invention, the weight portion of the magnetic powder is 0.1-0.3; preferably, the magnetic powder is 0.2 parts by weight.
Clinoptilolite powder adsorbs pollutants in the bottom sludge, and the release of the bottom sludge pollution to a water body is reduced. In the invention, the clinoptilolite powder accounts for 2-10 parts by weight; preferably, the clinoptilolite powder is 6 parts by weight.
The aluminum oxide has high porosity and can fully adsorb heavy metals in the bottom mud; in the invention, the weight portion of the aluminum oxide is 5-10; preferably, the weight part of the aluminum oxide is 8 parts.
The composite microbial inoculum has the advantages of deodorizing, reducing the generation of methane and hydrogen sulfide gas, decomposing macromolecular organic matters in the bottom sediment, and inhibiting the growth and propagation of harmful microorganisms such as harmful bacteria, pathogenic bacteria and the like. Preferably, the complex microbial inoculum comprises raw material bacteria, water and a carrier, wherein the raw material bacteria comprise: methylomonas (1-3). times.109cfu/g, Bacillus subtilis (5-10) x 109cfu/g and yeast (5-10). times.108cfu/g, wherein the water content (mass) in the composite microbial inoculum is 5-10%; the carrier of the composite microbial inoculum comprises corn stalk powder, corncobs and diatomite in a mass ratio of (1-2) to (0.5-1) to (0.1-0.2). In the invention, the weight portion of the composite microbial inoculum is 2-5 portions; preferably, the weight part of the composite microbial inoculum is 3 parts.
The lactobacillus can generate organic acid in the propagation process and promote molecular NH in bottom sediment3Conversion to ionic NH4+And the generation of molecular ammonia is reduced. The bacillus subtilis has the functions of deodorizing and reducing the generation of methane and hydrogen sulfide gas; the yeast can secrete amylase, protease, lipase and esterifying enzyme, can decompose macromolecular organic matters in the bottom sediment, and inhibit the growth and propagation of harmful microorganisms such as harmful bacteria, pathogenic bacteria and the like.
The preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier for later use;
dispersing raw material bacteria in an agar-surfactant aqueous solution to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 2-3h, and then drying at a low temperature of 5 ℃ with the water content controlled at 2% -6% to obtain the composite microbial inoculum.
Wherein the mass ratio of agar to surfactant in the agar-surfactant is 10 to (0.05-0.1), and the concentration of agar in the agar-surfactant aqueous solution is 10g/L-30 g/L.
The corn stalk powder has a size of 0.2-0.3mm, the corn cob 1-3mm, and the diatomite 1-5 μm. The corn stalk powder, the corncobs and the diatomite in the carrier are crushed into different sizes, so that the raw material bacteria can be attached to the carrier.
In the prepared composite bacterial agent, agar can form a film on the surface of the composite bacterial agent to seal the raw material bacteria, and when the composite bacteria and the bottom mud are not harvested, the agar is broken, and the raw material bacteria are released.
The earthworm feces have better activation effect on the physicochemical property of the sludge. In the invention, the weight portion of the earthworm excrement is 2-3; preferably, the weight part of the earthworm excrement is 2.4 parts.
The invention also provides a production process of the composite bottom mud modifier, which comprises the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 5-10h, adding a chitosan aqueous solution, stirring for 1-2h, and adjusting the pH value to be neutral;
2) adding the complex microbial inoculum and the earthworm feces into the step 1), uniformly stirring, adding a pectin solution, and stirring for 1-2 h;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain the composite bottom mud modifier.
The calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder, the aluminum oxide, the composite microbial inoculum, the calcium lignosulfonate, the earthworm excrement and the corn straw powder are the same as those described above, and are not described again.
The calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder and the aluminum oxide are firstly added into the glucose-citric acid solution, and then the chitosan is added, so that the solubility of the chitosan can be improved by the citric acid and the gluconobacter, the chitosan and the citric acid can be subjected to a carboxylation reaction, and active groups in the modifier are increased. Wherein the adding amount of the glucose-citric acid solution is 3-5 times of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder and the aluminum oxide, the mass concentration of the glucose in the glucose-citric acid solution is 0.1-0.2%, the mass concentration of the citric acid is 0.2-0.3%, the volume ratio of the chitosan water solution to the glucose-citric acid solution is (0.5-1) to 1, and the mass concentration of the chitosan in the chitosan water solution is 0.4-0.5%.
The pectin solution is beneficial to tabletting and granulation, wherein the mass concentration of pectin in the pectin solution is 005-0.1%; the addition amount of the pectin solution is 1-2 times of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder, the aluminum oxide, the composite microbial inoculum, the calcium lignosulphonate and the earthworm excrement. Preferably, the pectin comprises low-ester pectin and high-ester pectin, and the mass ratio of the low-ester pectin to the high-ester pectin is (2-3) to (0.6-1); wherein the esterification degree of the high-ester pectin is 10-20%, and the esterification degree of the low-ester pectin is 60-70%.
To further illustrate the technical solution of the present invention, the following examples are specifically illustrated.
Example 1
The composite microbial inoculum comprises raw material bacteria, water and a carrier, wherein the raw material bacteria comprise: methylomonas 1X 109cfu/g, Bacillus subtilis 5X 109cfu/g and yeast 5X 108cfu/g。
The water content in the composite microbial inoculum is 5 percent; the carrier of the composite microbial inoculum comprises corn stalk powder, corncobs and diatomite in a mass ratio of 1: 0.5: 0.1.
The preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier to obtain corn stalk powder with size of 0.2-0.3mm, corn cob with size of 1-3mm, and diatomite with size of 1-5 μm;
dispersing raw material bacteria in an agar-surfactant aqueous solution to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 2 hours, and then drying at low temperature of 5 ℃ with the water content controlled at 2 wt% to obtain the composite microbial inoculum.
The mass ratio of agar to the surface active agent in the agar-surface active agent is 10: 0.05, and the concentration of agar in the agar-surface active agent aqueous solution is 10 g/L.
Example 2
The composite microbial inoculum comprises raw material bacteria, water and a carrier, wherein the raw material bacteria comprise: methylomonas 3X 109cfu/g, Bacillus subtilis 10X 109cfu/g and yeast 10X 108cfu/g。
The water content in the composite microbial inoculum is 10 wt%; the carrier of the composite microbial inoculum comprises corn stalk powder, corncobs and diatomite in a mass ratio of 2: 1: 0.2.
The preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier to obtain corn stalk powder with size of 0.2-0.3mm, corn cob with size of 1-2mm, and diatomite with size of 1-3 μm;
dispersing raw material bacteria in an agar-surfactant aqueous solution to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 3 hours, and then drying at a low temperature of 5 ℃ with the water content controlled at 6 wt% to obtain the composite microbial inoculum.
The mass ratio of agar to the surface active agent in the agar-surface active agent is 10: 0.1, and the concentration of agar in the agar-surface active agent aqueous solution is 30 g/L.
Example 3
The composite microbial inoculum comprises raw material bacteria, water and a carrier, wherein the raw material bacteria comprise: methylomonas 2X 109cfu/g, 8 x 10 Bacillus subtilis9cfu/g and yeast 8X 108cfu/g。
The water content in the composite microbial inoculum is 5-10%; the carrier of the composite microbial inoculum comprises corn stalk powder, corncobs and diatomite according to the mass ratio of 1.5: 0.8: 0.15.
The preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier to obtain corn stalk powder with size of 0.2-0.3mm, corn cob with size of 2-3mm, and diatomite with size of 2-3 μm;
dispersing raw material bacteria in an agar-surfactant aqueous solution to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 2.5h, and then drying at a low temperature of 5 ℃ with the water content controlled at 4 wt% to obtain the composite microbial inoculum.
The mass ratio of agar to the surface active agent in the agar-surface active agent is 10: 0.08, and the concentration of agar in the agar-surface active agent aqueous solution is 20 g/L.
Example 4
The composite bottom mud modifier comprises the following raw materials in parts by weight:
10 parts of calcium peroxide, 1 part of sodium ferrate, 2 parts of medical stone, 0.1 part of magnetic powder, 2 parts of clinoptilolite powder, 5 parts of aluminum oxide, 2 parts of the composite microbial inoculum prepared in example 1, 2 parts of calcium lignosulphonate and 2 parts of earthworm excrement.
The production process of the composite bottom sediment modifier comprises the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 5h, adding a chitosan aqueous solution, stirring for 1h, and adjusting the pH value to be neutral; the addition amount of the glucose-citric acid solution is 3 times of the total mass of calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide, the mass concentration of glucose in the glucose-citric acid solution is 0.1 percent, the mass concentration of citric acid is 0.2 percent, the volume ratio of the chitosan water solution to the glucose-citric acid solution is 0.5: 1, and the mass concentration of chitosan in the chitosan water solution is 0.4 percent.
2) Adjusting the water content of the mixture obtained in the step 1) to 10%, adding the complex microbial inoculum and the earthworm feces, uniformly stirring, adding a pectin solution, and stirring for 1 h; the mass concentration of pectin in the pectin solution is 005%; the addition amount of the pectin solution is 1 time of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder, the aluminum oxide, the composite microbial inoculum, the calcium lignosulphonate and the earthworm excrement; the pectin comprises low-ester pectin and high-ester pectin, and the mass ratio of the low-ester pectin to the high-ester pectin is 2: 0.6; wherein the esterification degree of the high-ester pectin is 10 percent, and the esterification degree of the low-ester pectin is 60 percent;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain a cylindrical composite bottom mud modifier, wherein the size of the composite bottom mud modifier is as follows: the radius is 1mm and the height is 3 mm.
Example 5
The composite bottom mud modifier comprises the following raw materials in parts by weight:
30 parts of calcium peroxide, 3 parts of sodium ferrate, 8 parts of medical stone, 0.3 part of magnetic powder, 10 parts of clinoptilolite powder, 10 parts of aluminum oxide, 5 parts of the composite microbial inoculum prepared in example 2, 6 parts of calcium lignosulphonate and 3 parts of earthworm excrement.
The production process of the composite bottom sediment modifier comprises the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 10h, adding a chitosan aqueous solution, stirring for 2h, and adjusting the pH value to be neutral; the addition amount of the glucose-citric acid solution is 5 times of the total mass of calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide, the mass concentration of glucose in the glucose-citric acid solution is 0.2 percent, the mass concentration of citric acid is 0.3 percent, the volume ratio of the chitosan water solution to the glucose-citric acid solution is 1: 1, and the mass concentration of chitosan in the chitosan water solution is 0.5 percent.
2) Adjusting the water content of the mixture obtained in the step 1) to 15%, adding the complex microbial inoculum and the earthworm feces, uniformly stirring, adding a pectin solution, and stirring for 2 hours; the mass concentration of pectin in the pectin solution is 0.1 percent; the addition amount of the pectin solution is 2 times of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder, the aluminum oxide, the composite microbial inoculum, the calcium lignosulphonate and the earthworm excrement; the pectin comprises low-ester pectin and high-ester pectin, and the mass ratio of the low-ester pectin to the high-ester pectin is 3: 1; wherein the esterification degree of the high-ester pectin is 20 percent, and the esterification degree of the low-ester pectin is 70 percent;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain a cylindrical composite bottom mud modifier, wherein the size of the composite bottom mud modifier is as follows: the radius is 1mm and the height is 3 mm.
Example 6
The composite bottom mud modifier comprises the following raw materials in parts by weight:
20 parts of calcium peroxide, 2 parts of sodium ferrate, 5 parts of medical stone, 0.2 part of magnetic powder, 6 parts of clinoptilolite powder, 8 parts of aluminum oxide, 3 parts of the composite microbial inoculum prepared in example 3, 4 parts of calcium lignosulphonate and 2.4 parts of earthworm excrement.
The production process of the composite bottom sediment modifier comprises the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 8h, adding a chitosan aqueous solution, stirring for 2h, and adjusting the pH value to be neutral; the addition amount of the glucose-citric acid solution is 4 times of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder and the aluminum oxide, the mass concentration of the glucose in the glucose-citric acid solution is 0.15 percent, the mass concentration of the citric acid is 0.25 percent, the volume ratio of the chitosan water solution to the glucose-citric acid solution is 0.8: 1, and the mass concentration of the chitosan in the chitosan water solution is 0.45 percent.
2) Adjusting the water content of the mixture obtained in the step 1) to 12%, adding the complex microbial inoculum and the earthworm feces, uniformly stirring, adding the pectin solution, and stirring for 1.5 h; the mass concentration of pectin in the pectin solution is 0.08 percent; the addition amount of the pectin solution is 1.5 times of the total mass of the calcium peroxide, the sodium ferrate, the medical stone, the magnetic powder, the clinoptilolite powder, the aluminum oxide, the composite microbial inoculum, the calcium lignosulphonate and the earthworm excrement; the pectin comprises low-ester pectin and high-ester pectin, and the mass ratio of the low-ester pectin to the high-ester pectin is 2.5: 0.8; wherein the esterification degree of the high-ester pectin is 15 percent, and the esterification degree of the low-ester pectin is 65 percent;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain a cylindrical composite bottom mud modifier, wherein the size of the composite bottom mud modifier is as follows: the radius is 1mm and the height is 3 mm.
Comparative example 1
Based on example 6, compared with example 3, the difference is that the composite bottom mud modifier does not comprise 20 parts of calcium peroxide, and the rest is the same.
Comparative example 2
Based on example 6, compared with example 3, the difference is that the composite bottom mud modifier does not comprise 2 parts of sodium ferrate, and the rest is the same.
Comparative example 3
Based on the example 6, compared with the example 3, the difference is that the composite bottom mud modifier does not comprise 5 parts of medical stone, and the rest is the same.
Comparative example 4
Based on example 6, the difference is that the composite bottom mud modifier does not comprise 0.2 part of magnetic powder and the rest is the same as example 3.
Comparative example 5
Based on example 6, the difference from example 3 is that the composite bottom mud improver does not comprise 6 parts of clinoptilolite powder, and the rest is the same.
Comparative example 6
Based on the example 6, compared with the example 3, the difference is that the composite bottom mud modifier does not comprise 8 parts of aluminum oxide, and the rest is the same.
Comparative example 7
Based on example 6, the difference from example 3 is that 3 parts of the complex microbial inoculum prepared in example 3 are not included in the complex bottom sediment improver, and the rest is the same.
Comparative example 8
Based on example 6, the difference from example 3 is that in step 1, calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide are added into an aqueous solution, stirred for 8 hours, a chitosan aqueous solution is added into the aqueous solution, stirred for 2 hours, the pH value is adjusted to be neutral, and the rest is the same.
The modifiers prepared in examples 4 to 6 and comparative examples 1 to 8 were tested:
test raw materials: the bottom sludge is from the Hutuo river, the organic matter content (measured by a loss on ignition method) in the bottom sludge is 4.56 percent, and the water content in the bottom sludge is 45 percent;
evenly dividing the bottom mud into 12 parts, respectively adding 11 parts of the bottom mud (the dosage is 200g of the modifier in each kilogram of the bottom mud) prepared in the examples 4-6 and the comparative examples 1-8, and respectively adding the bottom mud into a closed tank after uniformly stirring; taking the rest bottom mud as a control group, adding the rest bottom mud into a closed tank without adding any modifier; the test is carried out for 10d in an environment with the temperature of 35 ℃.
The top of the closed tank is provided with a gas port for collecting gas and measuring CH in the gas4And H2S gas, the results are shown in table 1.
After 10 days of the test, the organic content of the bottom mud is tested, and the results are shown in Table 2.
TABLE 1 CH4And H2S concentration test results
Table 2 organic matter content test results
In conclusion, the above embodiments are merely intended to illustrate the technical solution of the present invention and not to limit, although the present invention has been described by referring to certain preferred embodiments thereof, it should be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (10)
1. The composite bottom mud modifier is characterized by comprising the following raw materials in parts by weight:
10-30 parts of calcium peroxide, 1-3 parts of sodium ferrate, 2-8 parts of medical stone, 0.1-0.3 part of magnetic powder, 2-10 parts of clinoptilolite powder, 5-10 parts of aluminum oxide, 2-5 parts of composite microbial inoculum, 2-6 parts of calcium lignosulphonate and 2-3 parts of earthworm excrement.
2. The composite bottom sediment improver as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight:
20 parts of calcium peroxide, 2 parts of sodium ferrate, 5 parts of medical stone, 0.2 part of magnetic powder, 6 parts of clinoptilolite powder, 8 parts of aluminum oxide, 3 parts of composite microbial inoculum, 4 parts of calcium lignosulphonate and 2.4 parts of earthworm excrement.
3. The compound bottom sediment improver as claimed in claim 1, wherein the compound microbial inoculum comprises raw material bacteria, water and a carrier, and the raw material bacteria comprise: methylomonas (1-3). times.109cfu/g, Bacillus subtilis (5-10) x 109cfu/g and yeast (5-10). times.108cfu/g。
4. The compound bottom sediment improver as claimed in claim 3, wherein the water content in the compound microbial inoculum is 5-10%.
5. The composite bottom sediment improver as claimed in claim 3, wherein the carrier of the composite microbial inoculum comprises corn stalk powder, corncobs and diatomite in a mass ratio of (0.5-1) to (0.1-0.2).
6. The compound bottom sediment improver as claimed in claim 3, wherein the preparation method of the compound microbial inoculum comprises the following steps:
pulverizing and sieving the carrier for later use;
dispersing raw material bacteria in agar-surfactant water to obtain a mixed solution, dispersing the mixed solution on a carrier, uniformly stirring, standing for 2-3h, and then drying at low temperature of 5 ℃ with the water content controlled at 2% -6% to obtain the composite microbial inoculum.
7. The composite bottom sediment improver according to claim 6, wherein the bran has a size of 0.2 to 0.3mm, the corncob has a size of 1 to 3mm, and the diatomaceous earth has a size of 1 to 5 μm.
8. A production process of the compound bottom mud modifier as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
1) adding calcium peroxide, sodium ferrate, medical stone, magnetic powder, clinoptilolite powder and aluminum oxide into a glucose-citric acid solution, stirring for 5-10h, adding a chitosan aqueous solution, stirring for 1-2h, and adjusting the pH value to be neutral;
2) adding the complex microbial inoculum and the earthworm feces into the step 1), uniformly stirring, adding a pectin solution, and stirring for 1-2 h;
3) granulating the mixture obtained in the step 2) by using a tablet press to obtain the composite bottom mud modifier.
9. The composite sediment improver according to claim 8, wherein the pectin comprises low-ester pectin and high-ester pectin, and the mass ratio of the low-ester pectin to the high-ester pectin is (2-3) to (0.6-1).
10. The composite sediment improver according to claim 9, wherein the degree of esterification of the high-ester pectin is 10 to 20% and the degree of esterification of the low-ester pectin is 60 to 70%.
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