CN115403229A - Method for treating aquaculture wastewater - Google Patents
Method for treating aquaculture wastewater Download PDFInfo
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- CN115403229A CN115403229A CN202211348511.3A CN202211348511A CN115403229A CN 115403229 A CN115403229 A CN 115403229A CN 202211348511 A CN202211348511 A CN 202211348511A CN 115403229 A CN115403229 A CN 115403229A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- 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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
Abstract
The invention discloses a treatment method of aquaculture wastewater, belonging to the technical field of sewage treatment; the method comprises the following steps: s1, carrying out anaerobic treatment on the culture wastewater, carrying out solid-liquid separation, and collecting a liquid phase to obtain the culture wastewater after the anaerobic treatment; s2, adding an adsorbent into the culture wastewater after the anaerobic treatment, performing solid-liquid separation after the adsorption treatment, and collecting a liquid phase to prepare the culture wastewater after the adsorption treatment; s3, performing biochemical treatment on the culture wastewater subjected to adsorption treatment, and then precipitating and disinfecting; the adsorbent comprises the following preparation raw materials: amino modified biochar and graphene oxide. According to the invention, the graphene oxide is added into the adsorbent, the graphene oxide has abundant functional groups (such as carboxyl) on the surface, and the graphene oxide construct a three-dimensional adsorption network through hydrogen bond acting force, so that the stability of the amino modified biochar and the graphene oxide in an adsorption system is favorably improved, and the adsorption effect of the adsorbent is further improved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a treatment method of aquaculture wastewater.
Background
With the large-scale development of the breeding industry, the breeding wastewater generated by breeding places is increasing day by day; the aquaculture wastewater mainly contains the following pollutants: organic matters, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and phosphorus-containing substances; therefore, the aquaculture wastewater needs to be treated and then can be discharged; in the related technology, the following method is mainly adopted to treat the breeding wastewater: the biological method, the physical method and the chemical method have good economic benefit and no secondary pollution, so the method has better application prospect; however, the biological method applied to the treatment of the aquaculture wastewater in the related technology has the following technical problems: the treatment effect of COD and ammonia nitrogen is poor.
Therefore, the invention provides a treatment method of aquaculture wastewater, which has good COD removal capability.
Disclosure of Invention
The present invention has been made to solve at least one of the problems and disadvantages in the related art, and it is an object of the present invention to provide a method for treating aquaculture wastewater.
Specifically, the invention provides a treatment method of aquaculture wastewater, which comprises the following steps:
s1, carrying out anaerobic treatment on the culture wastewater, carrying out solid-liquid separation, and collecting a liquid phase to obtain the culture wastewater after the anaerobic treatment;
s2, adding an adsorbent into the wastewater after the anaerobic treatment, performing solid-liquid separation after the adsorption treatment, and collecting a liquid phase to prepare culture wastewater after the adsorption treatment;
s3, performing biochemical treatment on the culture wastewater subjected to adsorption treatment, and then precipitating and disinfecting;
the adsorbent comprises the following preparation raw materials:
amino modified biochar and graphene oxide;
the COD of the aquaculture wastewater is above 25000 mg/L.
According to one technical scheme of the treatment method, the treatment method at least has the following beneficial effects:
the treatment method of the invention primarily removes COD through anaerobic treatment, and then solid-liquid separation is carried out on sludge and wastewater after the anaerobic treatment; and then adding the adsorbent into the wastewater after anaerobic treatment, and selectively adsorbing organic matters and ammonia nitrogen in the aquaculture wastewater by amino groups on the surface of amino modified biochar to biochar bodies (biochar is a solid substance which is obtained by carrying out high-temperature (< 700 ℃) cracking reaction on biological residues under the anoxic or anaerobic condition and is insoluble, stable, high in aromatizing degree and rich in carbon element content, and biochar has a compact microporous structure and a huge specific surface area and has an excellent adsorption effect), so that the organic matters and ammonia nitrogen in the aquaculture wastewater are efficiently removed.
According to the invention, graphene oxide is also added into the adsorbent, rich functional groups (such as carboxyl) exist on the surface of the graphene oxide, hydrogen bonding acting force exists on the carboxyl on the surface of the graphene oxide and the amino in the amino modified biochar, and a three-dimensional adsorption network is constructed by the carboxyl on the surface of the graphene oxide and the amino in the amino modified biochar, so that the stability of the amino modified biochar and the graphene oxide in an adsorption system is favorably improved, and the adsorption effect of the adsorbent is further improved.
According to some embodiments of the invention, the COD of the aquaculture wastewater is 25000mg/L to 30000mg/L.
According to some embodiments of the invention, the ammonia nitrogen of the aquaculture wastewater is above 1500 mg/L.
According to some embodiments of the invention, the ammonia nitrogen of the aquaculture wastewater is 1500 mg/L-2000 mg/L.
According to some embodiments of the invention, the aquaculture wastewater is pretreated.
According to some embodiments of the invention, the pre-treatment is a treatment sequentially passing through a primary precipitation, a coarse grid, a fine grid and a sedimentation tank.
According to some embodiments of the invention, the anaerobic treatment is performed in a UASB reactor.
According to some embodiments of the invention, the time of the anaerobic treatment is 10 to 20 hours.
According to some embodiments of the invention, the mass-to-volume ratio of the adsorbent to the aquaculture wastewater after anaerobic treatment is 1g to 2g:100mL.
According to some embodiments of the invention, the adsorption treatment is carried out for a time ranging from 1h to 2h.
According to some embodiments of the invention, the adsorption treatment requires agitation.
According to some embodiments of the invention, the stirring speed during the adsorption treatment is 400rpm to 500rpm.
According to some embodiments of the invention, the mass ratio of the amino modified biochar to the graphene oxide is 2.
According to the invention, the mass ratio of the amino modified biochar to the graphene oxide is controlled within the range, so that the construction of an adsorption network between the amino modified biochar and the graphene oxide is further promoted.
According to some embodiments of the invention, the amino-modified biochar comprises the following starting materials:
biochar and triethylene diamine.
Triethylene diamine has excellent reaction activity, thereby being beneficial to realizing the modification of biochar.
According to some embodiments of the invention, the mass ratio of the biochar to the triethylene diamine is 5.
The use amount of the biochar is too high, so that modification sites on the surface of the biochar are too few, and the improvement on the adsorption performance is limited; the use amount of the biochar is too low, and although the surface modification sites of the biochar can be increased, the biochar body material is less, so that the improvement of the adsorption performance is limited.
According to some embodiments of the invention, the method for preparing amino-modified biochar comprises the following steps: mixing the triethylene diamine and the biochar dispersion liquid, and then carrying out modification treatment at 50-60 ℃.
The modification temperature is controlled within the above range, which is advantageous for improving the modification effect of the biochar.
According to some embodiments of the present invention, the time of the modification treatment is 10h to 15h.
According to some embodiments of the invention, the modification treatment is a hydrothermal treatment.
According to some embodiments of the invention, the mass concentration of the biochar in the biochar dispersion liquid is 10 mg/L-20 mg/L.
According to some embodiments of the invention, the biochar dispersion is an aqueous biochar dispersion.
According to some embodiments of the invention, the method for preparing biochar comprises the following steps: thermally cracking the biomass raw material at 500-600 ℃.
By controlling the thermal cracking temperature within the above range, the performance of the biochar material can be improved.
According to some embodiments of the invention, the biomass feedstock comprises at least one of corn stover and cotton stover.
According to some embodiments of the invention, the thermally cracked atmosphere is a protective gas.
According to some embodiments of the invention, the protective gas comprises at least one of nitrogen and a noble gas.
According to some embodiments of the invention, the noble gas comprises at least one of helium, argon, neon and krypton.
According to some embodiments of the invention, the lateral dimension of the graphene oxide is 20 μm to 30 μm.
If the transverse size of the graphene oxide material is too large, the agglomeration of the graphene oxide material is aggravated; if the transverse size of the graphene oxide material is too small, the carrying capacity of the graphene oxide material on the amino modified biochar material is poor; therefore, the transverse size of the graphene oxide material is controlled in a reasonable range, so that the treatment effect of the adsorbent is further improved.
According to some embodiments of the invention, the method of preparing the adsorbent comprises the steps of: mixing the amino modified biochar dispersion liquid and the graphene oxide dispersion liquid for reaction.
According to the invention, the amino modified biochar and the graphene oxide are dispersed in advance and then react, so that the reaction rate between the amino modified biochar and the graphene oxide is improved.
According to some embodiments of the invention, the reaction time is 1h to 2h.
By controlling the reaction time within the above range, the adsorption effect of the adsorbent can be further improved.
According to some embodiments of the invention, the reaction temperature is between 90 ℃ and 100 ℃
According to the invention, the reaction temperature is controlled within the range, the amino on the surface of the amino modified biochar and the carboxyl on the surface of the graphene oxide are partially dehydrated and condensed to form a chemical bond, and the bonding strength of the chemical bond is far higher than the interaction of hydrogen bonds, so that a stable three-dimensional adsorption network is constructed.
According to some embodiments of the invention, the amino-modified biochar mass concentration in the amino-modified biochar dispersion is 5mg/L to 10mg/L.
According to some embodiments of the invention, the graphene oxide dispersion liquid contains 5mg/L to 10mg/L of graphene oxide by mass.
According to some embodiments of the invention, the stirring speed during the reaction is from 80rpm to 120rpm.
According to some embodiments of the invention, the disinfecting is with a disinfectant.
According to some embodiments of the invention, the biochemical treatment is performed in an SBR reactor.
According to some embodiments of the invention, the biochemical treatment time is 5 to 8 hours.
According to some embodiments of the invention, the disinfectant comprises at least one of sodium hypochlorite, calcium hypochlorite and chlorine dioxide.
Detailed Description
The conception and the resulting technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments so as to fully understand the objects, features and effects of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention; in this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example; furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The examples do not indicate specific conditions, and the conventional conditions or conditions suggested by the manufacturer are followed; the reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the embodiment of the invention, the COD of the aquaculture wastewater is 28157mg/L; the ammonia nitrogen content is 1823mg/L.
The preparation method of the biochar in the embodiment of the invention comprises the following steps:
s1, smashing corn straws into corn straw particles with the particle size of 2-3 mm;
s2, putting the corn straws into a muffle furnace filled with nitrogen, heating to 550 ℃, keeping for 4h, and cooling to generate biochar.
Graphene oxide in the embodiment of the invention is purchased from Hangzhou gaoyen scientific and technical limited company;
the product model is as follows: GX-pGO-1 with the transverse dimension of 3-5 mu m;
the product model is as follows: GX-pGO-2 with the transverse size of 20-30 mu m;
the product model is as follows: GX-pGO-3, the transverse dimension of which is 40 to 50 μm.
Example 1
The embodiment is a method for treating aquaculture wastewater, which comprises the following steps:
s1, anaerobic treatment: carrying out solid-liquid separation on the aquaculture wastewater sequentially through a primary precipitation tank, a coarse grating, a fine grating and a sedimentation tank to obtain pretreated aquaculture wastewater;
discharging the pretreated aquaculture wastewater into a UASB reactor for anaerobic treatment, wherein the time of the anaerobic treatment is 10 hours; after the treatment is finished, performing solid-liquid separation, wherein the solid phase is sludge, and the liquid phase is culture wastewater subjected to anaerobic treatment;
s2, adsorption treatment: adding an adsorbent into the culture wastewater subjected to anaerobic treatment prepared in the step S1 for adsorption treatment (the mass volume ratio of the adsorbent to the culture wastewater subjected to anaerobic treatment is 2g 100mL, the adsorption treatment time is 1.5h, and the stirring speed in the adsorption treatment process is 450 rpm); and after the adsorption treatment is finished, performing solid-liquid separation, wherein the liquid phase is the culture wastewater after the adsorption treatment.
S3, biochemical treatment: and (4) performing biochemical treatment (8 h) on the culture wastewater subjected to adsorption treatment in an SBR reactor, and precipitating and disinfecting effluent (a disinfectant is chlorine dioxide).
The preparation method of the adsorbent in this example comprises the following steps:
mixing amino modified biochar with water to prepare amino modified biochar dispersion liquid (the mass concentration is 10 mg/L);
mixing graphene oxide (GX-pGO-2) with water to prepare a graphene oxide dispersion liquid (the mass concentration is 10 mg/L);
mixing the graphene oxide dispersion liquid and the amino modified biochar dispersion liquid according to a volume ratio of 2; and after the reaction is finished, carrying out solid-liquid separation, collecting a solid phase, and drying to obtain the adsorbent.
The preparation method of the amino modified biochar in the embodiment comprises the following steps:
preparing biochar into biochar dispersion liquid (the mass concentration of the biochar in the dispersion liquid is 20 mg/L)
Mixing the biochar dispersion liquid and triethylene diamine, and carrying out hydrothermal treatment (the hydrothermal temperature is 60 ℃, the hydrothermal time is 12 hours, and the mass ratio of the biochar to the triethylene diamine in the biochar dispersion liquid is 5; and after the hydrothermal process is finished, carrying out solid-liquid separation, collecting a solid phase, and drying to obtain the amino modified biochar.
Example 2
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in the embodiment, the graphene oxide is GX-pGO-1.
Example 3
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in the embodiment, the graphene oxide is GX-pGO-3.
Example 4
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in this example, the mass ratio of graphene oxide to amino-modified biochar is 2.
Example 5
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in this example, the mass ratio of graphene oxide to amino-modified biochar is 4.
Example 6
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in the present example, the mass ratio of biochar to triethylene diamine is 10.
Example 7
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
in this example, the mass ratio of biochar to triethylene diamine is 5.
Example 8
The embodiment is a method for treating aquaculture wastewater, and the difference from the embodiment 1 is that:
the preparation method of the adsorbent in this example comprises the following steps:
mixing amino modified biochar with water to prepare amino modified biochar dispersion liquid (the mass concentration is 10 mg/L);
mixing graphene oxide (GX-pGO-2) with water to prepare a graphene oxide dispersion liquid (the mass concentration is 10 mg/L);
mixing the graphene oxide dispersion liquid and the amino modified biochar dispersion liquid according to a volume ratio of 2:1.5, and reacting at 80 ℃ for 2h (the stirring speed is 100rpm in the reaction process); and after the reaction is finished, carrying out solid-liquid separation, collecting a solid phase, and drying to obtain the adsorbent.
Comparative example 1
The comparative example is a method for treating aquaculture wastewater, and is different from the method in example 1 in that:
in this comparative example, biochar was used as the adsorbent.
Comparative example 2
The comparative example is a method for treating aquaculture wastewater, and is different from the method in example 1 in that:
the preparation method of the adsorbent in the comparative example consists of the following steps:
mixing biochar with water to prepare biochar dispersion liquid (the mass concentration is 10 mg/L);
mixing graphene oxide (GX-pGO-2) with water to prepare a graphene oxide dispersion liquid (the mass concentration is 10 mg/L);
mixing the graphene oxide dispersion liquid and the biochar dispersion liquid according to a volume ratio of 2; and after the reaction is finished, carrying out solid-liquid separation, collecting a solid phase, and drying to obtain the adsorbent.
Comparative example 3
The comparative example is a method for treating aquaculture wastewater, and is different from the method in example 1 in that:
in the comparative example, graphene oxide (GX-pGO-2) was used as the adsorbent.
Comparative example 4
The comparative example is a method for treating aquaculture wastewater, and is different from the method in example 1 in that:
in the comparative example, the adsorbent is amino modified biochar.
The removal rates of pollutants in the culture wastewater of the examples 1 to 8 and the comparative examples 1 to 4 of the invention are shown in Table 1.
TABLE 1 removal rates of pollutants in culture wastewater of examples 1 to 8 and comparative examples 1 to 4
In conclusion, after the COD is primarily removed through anaerobic treatment, the sludge is subjected to solid-liquid separation with the wastewater after the anaerobic treatment; adding an adsorbent into the wastewater after anaerobic treatment, and selectively adsorbing organic matters and ammonia nitrogen in the aquaculture wastewater by amino groups on the surface of amino modified biochar to biochar bodies (biochar is a solid substance which is obtained by carrying out high-temperature (< 700 ℃) cracking reaction on biological residues under the anoxic or anaerobic condition and is insoluble, stable, high in aromatizing degree and rich in carbon element content; and biochar has a compact microporous structure and a huge specific surface area and has an excellent adsorption effect), so that the organic matters and ammonia nitrogen in the aquaculture wastewater are efficiently removed; according to the invention, graphene oxide is also added into the adsorbent, rich functional groups (such as carboxyl) exist on the surface of the graphene oxide, hydrogen bonding acting force exists on the carboxyl on the surface of the graphene oxide and the amino in the amino modified biochar, and a three-dimensional adsorption network is constructed by the carboxyl on the surface of the graphene oxide and the amino in the amino modified biochar, so that the stability of the amino modified biochar and the graphene oxide in an adsorption system is favorably improved, and the adsorption effect of the adsorbent is further improved.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A treatment method of aquaculture wastewater is characterized by comprising the following steps:
s1, carrying out anaerobic treatment on the culture wastewater, carrying out solid-liquid separation, and collecting a liquid phase to obtain the culture wastewater after the anaerobic treatment;
s2, adding an adsorbent into the wastewater after the anaerobic treatment, performing solid-liquid separation after the adsorption treatment, and collecting a liquid phase to prepare culture wastewater after the adsorption treatment;
s3, performing biochemical treatment on the culture wastewater subjected to adsorption treatment, and then precipitating and disinfecting;
the adsorbent comprises the following preparation raw materials:
amino modified biochar and graphene oxide;
the COD of the aquaculture wastewater is above 25000 mg/L.
2. The method for treating aquaculture wastewater according to claim 1, wherein the mass ratio of the amino-modified biochar to the graphene oxide is 2.
3. The method for treating aquaculture wastewater according to claim 1, wherein the amino modified biochar comprises the following raw materials:
biochar and triethylene diamine.
4. The method for treating the aquaculture wastewater according to claim 3, wherein the mass ratio of the biochar to the triethylene diamine is 5 to 1-2.
5. The method for treating aquaculture wastewater according to claim 3, wherein the method for preparing the amino-modified biochar comprises the following steps: mixing the triethylene diamine and the biochar dispersion liquid, and then carrying out modification treatment at 50-60 ℃.
6. The method for treating aquaculture wastewater according to claim 3, wherein the method for preparing biochar comprises the following steps: thermally cracking the biomass raw material at 500-600 ℃.
7. The method for treating aquaculture wastewater according to claim 1, wherein the lateral dimension of the graphene oxide is 20-30 μm.
8. The method for treating aquaculture wastewater according to claim 1, wherein the method for preparing the adsorbent comprises the following steps: mixing the amino modified biochar dispersion liquid and the graphene oxide dispersion liquid for reaction.
9. The method for treating aquaculture wastewater according to claim 8, wherein the reaction time is 1h to 2h.
10. The method for treating aquaculture wastewater according to claim 8, wherein the reaction temperature is 90 ℃ to 100 ℃.
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| 黄占斌主编: "《环境材料学》", 30 November 2017, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115634665A (en) * | 2022-12-09 | 2023-01-24 | 湖南子宏生态科技股份有限公司 | Resourceful treatment method for aquaculture wastewater |
| CN115634665B (en) * | 2022-12-09 | 2023-11-07 | 湖南子宏生态科技股份有限公司 | Recycling treatment method of cultivation wastewater |
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| CN115403229B (en) | 2023-01-17 |
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