CN115594305A - Solid slow-release carbon source and preparation method thereof - Google Patents
Solid slow-release carbon source and preparation method thereof Download PDFInfo
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- CN115594305A CN115594305A CN202211236431.9A CN202211236431A CN115594305A CN 115594305 A CN115594305 A CN 115594305A CN 202211236431 A CN202211236431 A CN 202211236431A CN 115594305 A CN115594305 A CN 115594305A
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- carbon source
- corncobs
- rice hulls
- peanut shells
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 63
- 239000007787 solid Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 235000017060 Arachis glabrata Nutrition 0.000 claims abstract description 38
- 244000105624 Arachis hypogaea Species 0.000 claims abstract description 38
- 235000010777 Arachis hypogaea Nutrition 0.000 claims abstract description 38
- 235000018262 Arachis monticola Nutrition 0.000 claims abstract description 38
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 38
- 241000209140 Triticum Species 0.000 claims abstract description 38
- 235000021307 Triticum Nutrition 0.000 claims abstract description 38
- 235000020232 peanut Nutrition 0.000 claims abstract description 38
- 235000009566 rice Nutrition 0.000 claims abstract description 38
- 239000000945 filler Substances 0.000 claims abstract description 22
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
- 230000008014 freezing Effects 0.000 claims abstract description 8
- 238000007710 freezing Methods 0.000 claims abstract description 8
- 241000209094 Oryza Species 0.000 claims description 36
- 239000010902 straw Substances 0.000 claims description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 6
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 6
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- ORMDVQRBTFCOGC-UHFFFAOYSA-N (2-hydroperoxy-4-methylpentan-2-yl)benzene Chemical compound CC(C)CC(C)(OO)C1=CC=CC=C1 ORMDVQRBTFCOGC-UHFFFAOYSA-N 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims 1
- -1 dicumyl hydroperoxide Chemical compound 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 241000196324 Embryophyta Species 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 239000001913 cellulose Substances 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- SPTHWAJJMLCAQF-UHFFFAOYSA-M ctk4f8481 Chemical compound [O-]O.CC(C)C1=CC=CC=C1C(C)C SPTHWAJJMLCAQF-UHFFFAOYSA-M 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 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 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a solid slow-release carbon source and a preparation method thereof, which relate to the technical field of sewage treatment and comprise 30% -40% of corncobs, 20% -30% of peanut shells, 10% -20% of wheat stalks, 20% -30% of rice hulls and 1% -3% of cross-linking agents, wherein the corncobs, the peanut shells, the wheat stalks and the rice hulls are subjected to crushing and preheating treatment, then are subjected to freezing forming under the action of the cross-linking agents, and formed fillers are cut and then are placed into a carrier consisting of variable chains to obtain a required carbon source; the invention provides a solid slow-release carbon source filler which has good carbon release performance, low price and wide source, and solves the problem that the effluent quality does not reach the standard due to unstable addition of part of liquid carbon source; the carrier realizes the increase or reduction of the filling space of the filler by changing the shape of the deformable chain, can add solid slow-release carbon source amount orderly according to the requirement of water quality on the carbon source, can realize cyclic utilization, is economical and efficient, and avoids the problem of difficult degradation of late-stage cellulose caused by directly putting plant solid carbon sources.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a solid slow-release carbon source and a preparation method thereof.
Background
It is known from research reports on carbon source supplementation that liquid carbon sources such as short-chain organic carbon including methanol, ethanol, glucose and the like are mainly used for relatively mature and most applied carbon sources, but the problems of high cost, toxicity, uncertain dosage, difficult transportation and the like also lead researchers to start new research and attempt on additional carbon source supplementation. The hot spots mostly concentrate on how to optimize the traditional carbon source, such as adding a hydrolysis acidification process before a denitrification process, so as to improve the biodegradability and treatment rate of the raw sewage; developing non-traditional carbon sources as carbon sources which can be selected in the denitrification process, such as industrial wastewater, primary sludge hydrolysate, landfill leachate, plant straws and the like. However, these carbon sources have problems such as difficulty in controlling the amount of supply and insufficient supply in the late stage of initial overfeeding, which affect the metabolism of the microorganisms and further affect the effect of the treatment.
Patent CN111362416A describes a slow-release carbon source filler, which comprises micro-carbonized fiber, polyethylene glycol terephthalate, iron ore powder, carbon nano tubes, diatomite, a compatilizer and a lubricant, wherein the micro-carbonized fiber, the polyethylene glycol terephthalate, the iron ore powder, the carbon nano tubes, the diatomite, the compatilizer and the lubricant are weighed according to a certain proportion, added into a mixer to be uniformly mixed, then added into a double-screw extruder, heated and melted, and then extruded;
patent CN112174335A describes a porous slow-release wax loaded with a microorganism carbon source, which can slowly release the carbon source, does not cause the increase of COD (chemical oxygen demand) of a water body, can provide a continuous, as-needed and controllable carbon source for beneficial microorganisms, keeps the balance of carbon, nitrogen and phosphorus, is beneficial to the growth and the propagation of the beneficial microorganisms, and can form a through three-dimensional network pore channel so that the beneficial microorganisms in the water body can grow and propagate on the pore wall.
However, the existing solid slow-release carbon source is compounded by adopting organic matters mostly, certain secondary pollution is generated to a water body after the carbon source is slowly released, and the problems of high cost, complex manufacturing process and the like are all the problems. At present, natural material solid slow-release carbon sources are mostly used as fillers and carriers, nitrite nitrogen is easy to accumulate due to insufficient slow-release carbon, and residual lignin refractory substances are easy to increase head loss.
In view of the above problems, we provide a solid slow-release carbon source and a method for preparing the same to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a solid slow-release carbon source and a preparation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a solid slow-release carbon source comprises 30% -40% of corncobs, 20% -30% of peanut shells, 10% -20% of wheat straws, 20% -30% of rice hulls and 1% -3% of cross-linking agents, wherein the corncobs, the peanut shells, the wheat straws and the rice hulls are crushed, preheated, then frozen and formed under the action of the cross-linking agents, and formed fillers are cut and then placed into a carrier consisting of variable chains to obtain the required carbon source.
A preparation method of a solid slow-release carbon source comprises the following steps:
step 1, selecting 30% -40% of corncobs, 20% -30% of peanut shells, 10% -20% of wheat stalks and 20% -30% of rice hulls;
2, crushing the corncobs into particles of 1-2 cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.1-0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and raising the temperature to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice hulls through an alkali treatment solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, adding 1-3% of a cross-linking agent at the same time, uniformly stirring, and pouring into a mold;
step 6, placing the mold in a refrigerator, adjusting the temperature to-10-30 ℃, and keeping for 2-5 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the mold, cutting the material into spherical fillers with the length of 1cm, and putting the spherical fillers into a carrier consisting of variable chains to prepare the required carbon source.
As a further scheme of the invention: the cross-linking agent is one of DCP (dicumyl peroxide), BOP (benzoyl peroxide) and DBHP (dicumyl peroxide).
As a still further scheme of the invention: the alkali treatment solution is one of a 20% sodium hydroxide solution, a 20% potassium hydroxide solution and a 40% ammonia water solution.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a solid slow-release carbon source filler which has good carbon release performance, low price and wide source, and solves the problem that the effluent quality does not reach the standard due to unstable addition of part of liquid carbon source; the carrier realizes the increase or reduction of the filling space of the filler by changing the shape of the deformable chain, can add solid slow-release carbon source amount orderly according to the requirement of water quality on the carbon source, can realize cyclic utilization, is economical and efficient, and avoids the problem of difficult degradation of late-stage cellulose caused by directly putting plant solid carbon sources.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the embodiment of the invention, the solid slow-release carbon source comprises 30-40% of corncobs, 20-30% of peanut shells, 10-20% of wheat straws, 20-30% of rice hulls and 1-3% of a cross-linking agent, wherein the corncobs, the peanut shells, the wheat straws and the rice hulls are subjected to crushing and preheating treatment, then are subjected to freezing forming under the action of the cross-linking agent, and formed fillers are cut and then are placed into a carrier consisting of variable chains to obtain the required carbon source.
Example 1
A preparation method of a solid slow-release carbon source comprises the following steps:
step 1, selecting 30% of corncobs, 30% of peanut shells, 17% of wheat stalks and 20% of rice hulls;
step 2, crushing the corncobs into particles of 2 cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and raising the temperature to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice hulls by using a 20% sodium hydroxide solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, adding 3% of DBHP (diisopropylbenzene hydroperoxide) crosslinking agent, uniformly mixing, uniformly stirring, and pouring into a mold;
step 6, placing the mold in a refrigerator, adjusting the temperature to-20 ℃, and keeping for 3 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the mold, cutting the material into spherical fillers with the length of 1cm, and putting the spherical fillers into a carrier consisting of variable chains to prepare the required carbon source.
Example 2
A preparation method of a solid slow-release carbon source comprises the following steps:
step 1, selecting 30% of corncobs, 30% of peanut shells, 18% of wheat straws and 20% of rice hulls;
2, crushing the corncobs into particles of 1cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and raising the temperature to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice hulls by using a 20% sodium hydroxide solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, adding 2 percent of DCP (dicumyl peroxide) cross-linking agent, uniformly mixing, uniformly stirring, and pouring into a mold;
step 6, placing the mold in a refrigerator, adjusting the temperature to-30 ℃ and keeping for 2 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the mold, cutting the material into spherical fillers with the length of 1cm, and putting the spherical fillers into a carrier consisting of variable chains to prepare the required carbon source.
Example 3
A preparation method of a solid slow-release carbon source comprises the following steps:
step 1, selecting 40% of corncobs, 20% of peanut shells, 17% of wheat straws and 20% of rice hulls;
2, crushing the corncobs into particles of 2 cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and heating to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice husks by using a 40% ammonia water solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, simultaneously adding 3% of a cross-linking agent BOP (benzoyl peroxide) into the reactor, uniformly mixing, and pouring the mixture into a mold after uniformly stirring;
step 6, placing the mold in a refrigerator, adjusting the temperature to-20 ℃, and keeping for 3 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the die, cutting the material into 1cm spherical fillers, and putting the spherical fillers into a carrier consisting of variable chains after cutting to prepare the required carbon source.
Example 4
A preparation method of a solid slow-release carbon source comprises the following steps:
step 1, selecting 37% of corncobs, 30% of peanut shells, 10% of wheat straws and 20% of rice hulls;
step 2, crushing the corncobs into particles of 1cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and raising the temperature to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice hulls by using a 20% sodium hydroxide solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, adding 3% of DBHP (diisopropylbenzene hydroperoxide) crosslinking agent, uniformly mixing, uniformly stirring, and pouring into a mold;
step 6, placing the mold in a refrigerator, adjusting the temperature to-10 ℃ and keeping the temperature for 43 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the mold, cutting the material into spherical fillers with the length of 1cm, and putting the spherical fillers into a carrier consisting of variable chains to prepare the required carbon source.
And respectively taking monomer corncobs, peanut shells, wheat straws and rice husks as solid carbon sources for comparison, carrying out experiments under the same conditions with the solid carbon sources, investigating carbon release capacity, and taking COD (chemical oxygen demand) and ammonia nitrogen of effluent as judgment references.
TABLE-carbon Release Capacity of the samples
COD removal rate of effluent of the second meter
Ammonia nitrogen removing rate of water from the third effluent
The data show that the carbon release capacity, the COD removal rate and the ammonia nitrogen removal rate of the prepared solid slow-release filler are obviously higher than those of a single biomass solid carbon source, the carbon release capacity can reach 1.73mg/g at most, the COD removal rate can reach 95.43%, and the ammonia nitrogen removal rate can reach 91.23%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Although the present specification describes embodiments, not every embodiment includes only one embodiment, and such descriptions are provided for clarity, and it is understood that the embodiments may be combined as appropriate by those skilled in the art to form other embodiments, which will be apparent to those skilled in the art from this description.
Claims (4)
1. A solid slow-release carbon source, characterized in that: comprises 30 to 40 percent of corncob, 20 to 30 percent of peanut shell, 10 to 20 percent of wheat straw, 20 to 30 percent of rice hull and 1 to 3 percent of cross-linking agent.
2. The preparation method of the solid slow-release carbon source is characterized by comprising the following steps:
step 1, selecting 30% -40% of corncobs, 20% -30% of peanut shells, 10% -20% of wheat stalks and 20% -30% of rice hulls;
step 2, crushing the corncobs into particles of 1-2 cm, and crushing the peanut shells, the wheat straws and the rice hulls into powder of 0.1-0.5 cm in diameter;
step 3, placing the corncobs, the peanut shells, the wheat straws and the rice hulls obtained in the step 2 into a tubular furnace for heating, and raising the temperature to 200 ℃ at a low temperature of 100 ℃/h;
step 4, pretreating the preheated corncobs, peanut shells, wheat straws and rice hulls through an alkali treatment solution for 2 hours;
step 5, placing the corncobs, the peanut shells, the wheat straws and the rice hulls which are subjected to the alkali treatment into a reactor, adding 1-3% of a cross-linking agent at the same time, uniformly stirring, and pouring into a mold;
step 6, placing the mold in a refrigerator, adjusting the temperature to-10-30 ℃, and keeping for 2-5 hours;
and 7, taking the material obtained after the freezing in the step 6 out of the die, cutting the material into 1cm spherical fillers, and putting the spherical fillers into a carrier consisting of variable chains after cutting to prepare the required carbon source.
3. The method for preparing a slow-release solid carbon source according to claim 2, wherein the cross-linking agent is DCP (dicumyl peroxide), BOP (benzoyl peroxide) or DBHP (dicumyl hydroperoxide).
4. The method for preparing a solid slow-release carbon source according to claim 2, wherein the alkali treatment solution is one of a 20% sodium hydroxide solution, a 20% potassium hydroxide solution and a 40% ammonia solution.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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