CN111389367A - Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body - Google Patents
Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body Download PDFInfo
- Publication number
- CN111389367A CN111389367A CN202010321761.2A CN202010321761A CN111389367A CN 111389367 A CN111389367 A CN 111389367A CN 202010321761 A CN202010321761 A CN 202010321761A CN 111389367 A CN111389367 A CN 111389367A
- Authority
- CN
- China
- Prior art keywords
- sludge
- biochar
- metal
- based biochar
- phosphorus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
Abstract
The invention discloses a metal sludge-based biochar, a preparation method and application thereof in removing nitrogen and phosphorus in a water body, and the method comprises the following steps: 1) pretreatment of excess sludge: primarily centrifugally dewatering the residual sludge, standing for three days, fermenting and drying; 2) modification of excess sludge: modifying the dry sludge by adopting a metal solution; 3) firing of the biochar: carbonizing the modified sludge. The invention takes the excess sludge as the raw material, not only solves the problem that the excess sludge of the sewage treatment plant is difficult to treat, but also realizes the resource utilization of the excess sludge. The metal sludge-based biochar can well adsorb nitrogen and phosphorus in water due to a plurality of pores, so that the metal sludge-based biochar can be used as an adsorbent to adsorb and remove the nitrogen and phosphorus in various sewage so as to solve the problem of water pollution.
Description
Technical Field
The invention relates to metal sludge-based biochar, a preparation method and application thereof in removing nitrogen and phosphorus in a water body, and belongs to the field of water treatment.
Background
In recent years, the surplus sludge of sewage treatment plants is increasing day by day, and the common method for resource utilization is landfill or incineration, but the landfill can cause serious secondary pollution, including underground water pollution, land pollution, heavy metal pollution and the like; incineration wastes a large amount of heat energy (the water content of the residual sludge is generally about 80%), and the incineration products pollute the atmosphere. Therefore, how to better utilize the biomass as a resource is always a research hotspot, and the method for modifying the biomass into biochar and applying the biochar to water environment treatment is a good resource utilization method.
Biochar is a carbon-rich solid byproduct remaining after pyrolysis of biomass in an anaerobic or hypoxic state. In recent years, due to the remarkable environmental and social benefits of biochar, there has been a wide interest and great attention worldwide. The carbon content is high, the pore structure is developed, the corrosion resistance is good, water and nutrients can be kept, pollutants such as organic matters, nitrogen and phosphorus can be adsorbed, and the soil conditioner and the adsorbent are also ideal. The application of the biochar can bring four environmental benefits: slow down greenhouse benefit, improve soil, improve crop yield and reduce environmental pollution. After the biological carbon is pyrolyzed, most of the biological carbon is carbon, the biological carbon is stable in property and not easy to decompose, the nitrogen and phosphorus contents of the biological carbon are high, nutrient substances and beneficial microorganisms are very easy to gather in a hole structure of the biological carbon, and water is kept, so that the use of a chemical fertilizer is reduced, simultaneously, soil becomes fertile and is beneficial to plant growth, agriculture is enabled to have continuity while yield is increased, meanwhile, a developed hole structure and rich surface functional groups of the biological carbon enable the biological carbon to have a good removal effect on organic matters and nitrogen and phosphorus, the biological carbon is an ideal adsorbent, in recent years, the process along with urbanization and industrialization is accelerated, and the chemical fertilizer is used in large quantities, so that a large amount of nitrogen and phosphorus enters various water bodies and is enriched in the water bodies. Nitrogen and phosphorus are main factors causing water eutrophication, the water is very likely to develop into a black and odorous river after outbreak of water eutrophication, red tide and the like, and as can be seen from the eutrophication degree of water in China and the number of the rapidly increased black and odorous river in recent years, no good method and material for removing nitrogen and phosphorus pollutants in water with high efficiency, low cost and no secondary pollution still exist at present. Therefore, based on the properties of the biochar, the modified biochar is used for removing nitrogen and phosphorus in the water body and is a good research direction.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the metal sludge-based biochar, the preparation method and the application of the metal sludge-based biochar in removing nitrogen and phosphorus in water, so that the aims of resource utilization of residual sludge and treatment of water pollution by using the prepared sludge-based biochar are fulfilled.
In order to achieve the purpose, the preparation method of the metal sludge-based biochar comprises the following steps:
1) pretreatment of excess sludge: primarily centrifugally dewatering the residual sludge, standing for three days, fermenting and drying;
2) modification of excess sludge: modifying the dry sludge by adopting a metal solution;
3) firing of the biochar: carbonizing the modified sludge.
In the step 1), the excess sludge obtained from the sewage treatment plant is dehydrated to 50% or less by a centrifuge, and is dried by an oven at 90 ℃ after being left to stand for three days at room temperature.
As an improvement, in the step 2), after the residual sludge is immersed in the metal solution, the residual sludge is stirred on a magnetic stirrer at the rotating speed of 240r/min for 12 hours and then dried in an oven at the temperature of 95 ℃.
As a modification, the metal solution used in the step 2) is any one of a magnesium sulfate solution of 50 mg/L, an aluminum nitrate solution of 30 mg/L, an iron chloride solution of 30 mg/L or a manganese nitrate solution of 30 mg/L.
As an improvement, in the step 3), the modified sludge is subjected to anoxic carbonization in a muffle furnace at 600 ℃ at a heating rate of 15 ℃/min, and is cooled to room temperature after carbonization, and then is ground into powder.
In addition, the invention also provides the metal sludge-based biochar prepared by the preparation method.
Finally, the invention also provides application of the metal sludge-based biochar in removing nitrogen and phosphorus in a water body.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention takes the excess sludge as the raw material, not only solves the problem that the excess sludge of the sewage treatment plant is difficult to treat, but also realizes the resource utilization of the excess sludge.
2. The metal sludge-based biochar can well adsorb nitrogen and phosphorus in water due to a plurality of pores, so that the metal sludge-based biochar can be used as an adsorbent to adsorb and remove the nitrogen and phosphorus in various sewage so as to solve the problem of water pollution.
3. The metal modification method adopted by the invention can effectively utilize various heavy metals in the sludge, not only avoids secondary pollution caused by the heavy metals in the sludge, but also improves the adsorption performance of the sludge-based biochar, thereby achieving two purposes.
4. The invention does not relate to strong acid and strong alkali in the modification process, has safe operation, does not need to adjust the pH value of the excess sludge, and simultaneously, magnesium sulfate (or manganese nitrate, ferric chloride and aluminum nitrate) used for modification is easier to obtain than other modification materials.
5. The invention can not cause secondary pollution in the process of firing the sludge-based biochar.
Drawings
FIG. 1 is an SEM image of five biochar types prepared by the present invention;
FIG. 2 is a Fourier diagram of five biochar types produced by the present invention;
FIG. 3 is an XRD pattern of five biochar types produced by the present invention;
FIG. 4 shows that five biochar prepared by the invention adsorb NH4 +(a) And PO4 3-(b) (ii) an internal diffusion fit;
FIG. 5 shows five biochar pairs NH prepared by the method4 +(a) And PO4 3-(b) Freundlich plot of adsorption isotherms of (a);
FIG. 6 shows five biochar pairs NH prepared by the method4 +(a) And PO4 3-(b) Quasi-second order fit graph of adsorption kinetics.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
Example 1
A preparation method of metal sludge-based biochar comprises the following steps:
1) firstly, dewatering the residual sludge obtained from a sewage treatment plant to below 50% (the rotating speed of a centrifugal machine is 800r/min), then standing for 3 days at room temperature, and finally completely drying the water at 90 ℃ by using an oven;
2) in the modification process, the dried sludge is placed in a container and immersed by a magnesium sulfate solution of 50 mg/L, and the container is placed on a magnetic stirrer to be stirred for 12 hours, then taken down and placed in an oven to be dried at 95 ℃;
3) when the biochar is fired, the modified sludge is placed in a crucible to be carbonized in a muffle furnace (the carbonization temperature is 600 ℃, the speed is 15 ℃/min in the heating process), and after the modified sludge is fired, the modified sludge is cooled to the room temperature in the muffle furnace and then is taken out to be ground into powder, so that the magnesium modified sludge-based biochar BC-Mg is obtained.
Example 2
A preparation method of metal sludge-based biochar comprises the following steps:
1) firstly, dewatering the excess sludge obtained from a sewage treatment plant to below 50 percent by using a centrifugal machine (the original water content is about 80 percent, and the rotating speed of the centrifugal machine is 800r/min), then standing for 3 days at room temperature (further reducing the water content of the excess sludge and simultaneously performing certain fermentation on the excess sludge), and finally, completely drying the water by using an oven at 90 ℃ to finish the pretreatment of the excess sludge;
2) in the modification process, the dried sludge is placed in a container and immersed in 30 mg/L aluminum nitrate solution, the container is placed on a magnetic stirrer to be stirred for 12 hours, then the container is taken down and placed in an oven to be dried at 95 ℃;
3) when the biochar is fired, the modified sludge is placed in a crucible and subjected to anoxic carbonization (the carbonization temperature is 600 ℃, the speed is 15 ℃/min in the heating process) in a muffle furnace, and after the modified sludge is fired, the modified sludge is cooled to the room temperature in the muffle furnace and then taken out and ground into powder, so that the aluminum modified sludge-based biochar BC-Al is obtained.
Correspondingly, modifying by using 30 mg/L ferric chloride solution and 30 mg/L manganese nitrate solution according to the steps to obtain the iron-modified sludge-based biochar BC-Fe and the manganese-modified sludge-based biochar BC-Mn.
In addition, the metal solution modification link in the preparation method is omitted, and the unmodified sludge-based Biochar (BC) is prepared.
The results of the detection of BC, BC-Mg, BC-Al, BC-Fe and BC-Mn according to the present invention are shown in FIGS. 1-3 and tables 1-2.
TABLE 1 XPS data for five biochar types produced according to the invention
TABLE 2 BET data for five biochar products made according to the invention
As can be seen from the analysis of FIGS. 1-3 and tables 1-2, the specific surface area of all the modified biochar was greater than BC. This shows that the biochar modified by the metal ions has more attachment sites when adsorbing nitrogen and phosphorus, which means that the capability of the biochar for adsorbing nitrogen and phosphorus is greatly improved. Meanwhile, the H/C value of all the modified biochar is reduced a little, and H/C represents the aromatizing degree of the biochar, which shows that the biochar modified by metal ions has higher aromatizing degree than BC (the smaller the H/C is, the higher the aromatizing degree is). The higher the aromatizing degree is, the more beneficial to the adsorption of nitrogen and phosphorus. As can be seen from the content of the metal ions, the content of the corresponding modified metal ions of the modified biochar is greatly increased, which indicates that a part of the metal ions participate in the formation of the biochar in the modification process. The content of C in the modified biochar is reduced, which shows that a part of functional groups containing C are lost in the modification process, and this shows that metal ions promote the breakage of part of carbon chains to form shorter carbon chains, which is beneficial to improving the thought ability of biochar to nitrogen and phosphorus.
In addition, the prepared sludge-based biochar BC, magnesium-modified sludge-based biochar BC-Mg, aluminum-modified sludge-based biochar BC-Al, iron-modified sludge-based biochar BC-Fe and manganese-modified sludge-based biochar BC-Mn are respectively subjected to nitrogen and phosphorus adsorption effect tests:
1. adsorption kinetics experiment
50ml of NH with a concentration of 50 mg/L was added to a 100ml plastic centrifuge tube4Respectively and accurately weighing 20Mg of sludge-based Biochar (BC) and metal ion modified sludge-based biochar (BC-Mg, BC-Fe, BC-Al and BC-Mn) into the Cl solution;
in addition, the method can be used for producing a composite material50ml of K with a concentration of 50 mg/L was added to a 100ml plastic centrifuge tube2H2PO4Respectively and accurately weighing 20Mg of sludge-based Biochar (BC) and metal ion modified sludge-based biochar (BC-Mg, BC-Fe, BC-Al and BC-Mn) and putting the BC-Mg and the metal ion modified sludge-based biochar into the solution;
shaking the plastic centrifuge tubes at 25 deg.C and 190r/min for 24h, collecting supernatant at 5, 10, 15, 20, 30, 60, 120, 180, 240, 480, 720, and 1440min, respectively, filtering with 0.45um filter membrane, and measuring NH in sample by high performance liquid chromatography4 +And PO4 3-And (4) calculating the adsorption amount of the concentration, and determining the optimal adsorption time.
2. Adsorption isotherm experiments:
similarly, 50ml of NH with a concentration of 2, 5, 10, 15, 20, 30, 40, 50, 60, 70mg/l were added to 100ml plastic centrifuge tubes4Respectively and accurately weighing 20Mg of sludge-based Biochar (BC) and metal ion modified sludge-based biochar (BC-Mg, BC-Fe, BC-Al and BC-Mn) into the Cl solution;
in addition, 50ml of K with the concentration of 2, 5, 10, 15, 20, 30, 40, 50, 60 and 70mg/l is respectively added into a 100ml plastic centrifuge tube2H2PO4Respectively and accurately weighing 20Mg of sludge-based Biochar (BC) and metal ion modified sludge-based biochar (BC-Mg, BC-Fe, BC-Al and BC-Mn) and putting the BC-Mg and the metal ion modified sludge-based biochar into the solution;
shaking the plastic centrifuge tubes at 25 deg.C and 190r/min for 24 hr, taking out after 16 hr, collecting supernatant, filtering with 0.45um filter membrane, and measuring NH in sample by high performance liquid chromatography4 +And PO4 3-And (4) calculating the maximum adsorption quantity of the concentration.
As shown in fig. 4, 5, and 6, the maximum adsorption amount of nitrogen and phosphorus by all the modified sludge-free biochar was significantly increased. Adsorbing NH4 +Compared with the maximum adsorption amount of 3.4554Mg/g of BC, the adsorption performance of BC-Mg is obviously improved to 30.581 Mg/g. And other modified biochar is BC-Al 17.762mg/g, BC-Fe 5.2854mg/g and BC-Mn 7.7280mg/g, which are respectively obviously improved.
In adsorbing PO4 3-In the process, the adsorption effect of the modified biochar is also obviously improved, and compared with the maximum adsorption amount of the BC of 8.5034Mg/g, the maximum adsorption amount of BC-Mg is surprisingly 400 Mg/g. The others are respectively BC-Al 204.08mg/g, BC-Fe196.08mg/g and BC-Mn 113.64 mg/g. There is a great lift.
Meanwhile, as can be seen from fig. 4 and 6, the adsorption of nitrogen and phosphorus by the biochar is divided into three stages, wherein the first stage and the second stage have high adsorption speed, and the third stage has low speed and slowly tends to adsorption balance. Moreover, all biochar adsorbs at a faster rate, especially when adsorbing nitrogen.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The preparation method of the metal sludge-based biochar is characterized by comprising the following steps:
1) pretreatment of excess sludge: primarily centrifugally dewatering the residual sludge, standing for three days, fermenting and drying;
2) modification of excess sludge: modifying the dry sludge by adopting a metal solution;
3) firing of the biochar: carbonizing the modified sludge.
2. The method according to claim 1, wherein in the step 1), the excess sludge obtained from a sewage treatment plant is dewatered to 50% or less by a centrifuge, left to stand at room temperature for three days, and then dried by an oven at 90 ℃.
3. The method for preparing the biochar based on the metal sludge as claimed in claim 1, wherein in the step 2), after the residual sludge is immersed in the metal solution, the mixture is stirred on a magnetic stirrer at the rotating speed of 240r/min for 12 hours and then is dried in an oven at the temperature of 95 ℃.
4. The method for preparing metal sludge-based biochar according to claim 1 or 3, wherein the metal solution adopted in the step 2) is any one of a magnesium sulfate solution of 50 mg/L, an aluminum nitrate solution of 30 mg/L, an iron chloride solution of 30 mg/L or a manganese nitrate solution of 30 mg/L.
5. The method for preparing the metal sludge-based biochar according to claim 1, wherein in the step 3), the modified sludge is subjected to anoxic carbonization in a muffle furnace, the carbonization temperature is 600 ℃, the temperature rise rate is 15 ℃/min, and the modified sludge is cooled to room temperature after carbonization and ground into powder.
6. A metal sludge-based biochar, characterized in that the metal sludge-based biochar is produced by the production method according to any one of claims 1 to 5.
7. The use of the metal sludge-based biochar of claim 6 in removing nitrogen and phosphorus from a water body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321761.2A CN111389367A (en) | 2020-04-22 | 2020-04-22 | Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321761.2A CN111389367A (en) | 2020-04-22 | 2020-04-22 | Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111389367A true CN111389367A (en) | 2020-07-10 |
Family
ID=71417637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010321761.2A Pending CN111389367A (en) | 2020-04-22 | 2020-04-22 | Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111389367A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112808236A (en) * | 2021-01-07 | 2021-05-18 | 华南理工大学 | Ecological treatment and resource utilization method for lake polluted bottom sludge and application thereof |
| CN113145073A (en) * | 2021-04-23 | 2021-07-23 | 桂林理工大学 | Preparation method and application of secondary lanthanum carbide modified sludge biochar |
| CN113145074A (en) * | 2021-04-23 | 2021-07-23 | 桂林理工大学 | Preparation method and application of biochar prepared from lanthanum-modified excess sludge |
| CN113371817A (en) * | 2021-06-10 | 2021-09-10 | 北京建筑大学 | Biological retention device and preparation method of magnesium modified biochar for mixed filler of biological retention device |
| CN113582312A (en) * | 2021-08-10 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Excess sludge modified inorganic-organic composite flocculant and preparation method and application thereof |
| CN114029034A (en) * | 2021-11-10 | 2022-02-11 | 上海第二工业大学 | Phosphorus-based biochar adsorbing material, preparation method and application thereof |
| CN114405471A (en) * | 2022-01-27 | 2022-04-29 | 东南大学 | Aluminum-iron bimetal modified biochar phosphorus removal material and preparation method thereof |
| CN114632495A (en) * | 2022-04-15 | 2022-06-17 | 徐州工程学院 | Composite modified sludge-based biochar for efficiently removing nitrogen and phosphorus in water, and preparation method and application thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000247620A (en) * | 1999-03-02 | 2000-09-12 | Kochi Prefecture | Production of active carbon |
| WO2007137856A2 (en) * | 2006-05-31 | 2007-12-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Catalytically-active activated carbons doped with metal salts and use thereof |
| JP2013059754A (en) * | 2011-09-15 | 2013-04-04 | Iwate Prefecture | Adsorbent and virus adsorption method |
| CN103396815A (en) * | 2013-08-05 | 2013-11-20 | 中国科学院城市环境研究所 | Method for preparing carbon materials by use of sludge |
| CN103406094A (en) * | 2013-06-04 | 2013-11-27 | 北京林业大学 | Method for manufacturing magnetic sludge-based active carbon |
| CN103608104A (en) * | 2011-02-03 | 2014-02-26 | 萨里大学 | Composite adsorbent material containing a porous carbon matrix |
| CN105289498A (en) * | 2015-11-26 | 2016-02-03 | 东南大学 | Preparation method of composite of biochar-carbon nano-material |
| CN106861622A (en) * | 2017-03-31 | 2017-06-20 | 华北电力大学（保定） | A kind of water treatment agent for processing eutrophication water |
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN109809403A (en) * | 2019-03-18 | 2019-05-28 | 中国药科大学 | A kind of preparation method and application of the biogas residue matrix activated carbon with high absorption property |
| CN110330979A (en) * | 2019-07-10 | 2019-10-15 | 青岛农业大学 | A kind of preparation method of modification biological charcoal, modification biological charcoal, composite material and soil-repairing agent |
-
2020
- 2020-04-22 CN CN202010321761.2A patent/CN111389367A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000247620A (en) * | 1999-03-02 | 2000-09-12 | Kochi Prefecture | Production of active carbon |
| WO2007137856A2 (en) * | 2006-05-31 | 2007-12-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Catalytically-active activated carbons doped with metal salts and use thereof |
| CN103608104A (en) * | 2011-02-03 | 2014-02-26 | 萨里大学 | Composite adsorbent material containing a porous carbon matrix |
| JP2013059754A (en) * | 2011-09-15 | 2013-04-04 | Iwate Prefecture | Adsorbent and virus adsorption method |
| CN103406094A (en) * | 2013-06-04 | 2013-11-27 | 北京林业大学 | Method for manufacturing magnetic sludge-based active carbon |
| CN103396815A (en) * | 2013-08-05 | 2013-11-20 | 中国科学院城市环境研究所 | Method for preparing carbon materials by use of sludge |
| CN105289498A (en) * | 2015-11-26 | 2016-02-03 | 东南大学 | Preparation method of composite of biochar-carbon nano-material |
| CN106861622A (en) * | 2017-03-31 | 2017-06-20 | 华北电力大学（保定） | A kind of water treatment agent for processing eutrophication water |
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN109809403A (en) * | 2019-03-18 | 2019-05-28 | 中国药科大学 | A kind of preparation method and application of the biogas residue matrix activated carbon with high absorption property |
| CN110330979A (en) * | 2019-07-10 | 2019-10-15 | 青岛农业大学 | A kind of preparation method of modification biological charcoal, modification biological charcoal, composite material and soil-repairing agent |
Non-Patent Citations (1)
| Title |
|---|
| 程伟凤等: "城市污泥厌氧发酵残渣热解制备生物炭及其氮磷吸附研究", 《化工学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112808236A (en) * | 2021-01-07 | 2021-05-18 | 华南理工大学 | Ecological treatment and resource utilization method for lake polluted bottom sludge and application thereof |
| CN113145073A (en) * | 2021-04-23 | 2021-07-23 | 桂林理工大学 | Preparation method and application of secondary lanthanum carbide modified sludge biochar |
| CN113145074A (en) * | 2021-04-23 | 2021-07-23 | 桂林理工大学 | Preparation method and application of biochar prepared from lanthanum-modified excess sludge |
| CN113371817A (en) * | 2021-06-10 | 2021-09-10 | 北京建筑大学 | Biological retention device and preparation method of magnesium modified biochar for mixed filler of biological retention device |
| CN113582312A (en) * | 2021-08-10 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Excess sludge modified inorganic-organic composite flocculant and preparation method and application thereof |
| CN114029034A (en) * | 2021-11-10 | 2022-02-11 | 上海第二工业大学 | Phosphorus-based biochar adsorbing material, preparation method and application thereof |
| CN114405471A (en) * | 2022-01-27 | 2022-04-29 | 东南大学 | Aluminum-iron bimetal modified biochar phosphorus removal material and preparation method thereof |
| CN114405471B (en) * | 2022-01-27 | 2023-12-22 | 东南大学 | Aluminum-iron bimetal modified biochar dephosphorizing material and preparation method thereof |
| CN114632495A (en) * | 2022-04-15 | 2022-06-17 | 徐州工程学院 | Composite modified sludge-based biochar for efficiently removing nitrogen and phosphorus in water, and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111389367A (en) | Metal sludge-based biochar, preparation method and application in removing nitrogen and phosphorus in water body | |
| US11642649B2 (en) | Method for preparing biochar from phosphoric acid-modified Enteromorpha prolifera, and use of biochar in removal of cadmium | |
| CN105170091A (en) | Preparation method of iron-modified reed biological carbon, and application of iron-modified reed biological carbon in treatment of phosphorus wastewater | |
| CN110227416A (en) | A kind of preparation and its application in fluoroquinolone antibiotics removal in water of iron zinc and phosphoric acid modification sludge organism charcoal | |
| CN110743498B (en) | Preparation method of edible fungus residue biochar | |
| CN113321345A (en) | Method for simultaneously recovering phosphorus in water body and removing antibiotics based on sludge-based biochar | |
| CN111206027B (en) | Magnetic biochar suitable for loading bacillus and preparation method and application thereof | |
| CN111661943B (en) | Comprehensive biogas slurry utilization method | |
| CN110499339B (en) | Method for improving methane production efficiency by anaerobic digestion | |
| CN104801306A (en) | Powdered activated carbon catalyst prepared from turf used as raw material and preparation method | |
| CN116924605A (en) | Mine acid wastewater ecological treatment system and treatment method thereof | |
| CN109499531B (en) | Adsorption material for domestic sewage treatment, preparation method and application thereof | |
| CN115337904B (en) | Preparation method and application of magnesium-containing biochar | |
| CN114053999B (en) | Coffee residue biochar and preparation method and application thereof | |
| CN114477691B (en) | Method for preparing functional blue algae biochar and applying functional blue algae biochar to strengthening anaerobic digestion | |
| CN114456942B (en) | Chain belt algae for treating high-concentration molasses alcohol wastewater and application thereof | |
| CN115672276A (en) | Method for enhancing copper ion adsorption of biochar by utilizing magnesium chloride modification | |
| CN112553095B (en) | Compound microbial inoculum for treating high-concentration kitchen wastewater and preparation method thereof | |
| CN114632495A (en) | Composite modified sludge-based biochar for efficiently removing nitrogen and phosphorus in water, and preparation method and application thereof | |
| CN114904480A (en) | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm | |
| CN113526676A (en) | Artificial wetland system capable of enhancing denitrification | |
| CN112808236A (en) | Ecological treatment and resource utilization method for lake polluted bottom sludge and application thereof | |
| CN108262023B (en) | Method for treating biogas slurry wastewater by using ferric phosphate powder purified by orange peel and phosphated slag | |
| CN110818180A (en) | Method for digesting black and odorous river channel by using microbial preparation | |
| CN116809018B (en) | Preparation method and application of sludge biochar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200710 |