CN115093088A - Preparation method of sludge synergistic decrement attenuation treatment agent - Google Patents
Preparation method of sludge synergistic decrement attenuation treatment agent Download PDFInfo
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- CN115093088A CN115093088A CN202210549552.2A CN202210549552A CN115093088A CN 115093088 A CN115093088 A CN 115093088A CN 202210549552 A CN202210549552 A CN 202210549552A CN 115093088 A CN115093088 A CN 115093088A
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- 239000010802 sludge Substances 0.000 title claims abstract description 150
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 28
- 238000011282 treatment Methods 0.000 title claims abstract description 25
- 230000002195 synergetic effect Effects 0.000 title claims description 8
- 238000002360 preparation method Methods 0.000 title description 3
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 24
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 230000001580 bacterial effect Effects 0.000 claims description 11
- 231100000419 toxicity Toxicity 0.000 claims description 8
- 230000001988 toxicity Effects 0.000 claims description 8
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 claims description 7
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000001963 growth medium Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 244000052616 bacterial pathogen Species 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000003100 immobilizing effect Effects 0.000 claims 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 22
- 230000009467 reduction Effects 0.000 abstract description 7
- 239000002910 solid waste Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 231100000584 environmental toxicity Toxicity 0.000 abstract 1
- 238000011068 loading method Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000007605 air drying Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 241000605118 Thiobacillus Species 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 description 1
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 230000005541 medical transmission Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- 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
- C02F11/004—Sludge detoxification
-
- 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
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
-
- 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
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge decrement and attenuation treating agent which is prepared from municipal sludge and used for treating the sludge so as to reduce the content of heavy metal cadmium in the sludge and the water content of the sludge. The production process is simple and easy to operate, the raw materials are simple and easy to obtain, the production cost is low, and the solid waste is fully utilized to prepare the sludge reduction and attenuation treating agent so as to achieve the purpose of treating wastes with processes of wastes against one another; the invention can reduce the content of heavy metal cadmium in the sludge, greatly reduce the environmental toxicity of the sludge, improve the feasibility of subsequent treatment and disposal of the sludge and lay a foundation for the comprehensive utilization of the sludge.
Description
Technical Field
The invention belongs to the technical field of sludge reduction and harmless production processes, and also belongs to the field of recycling application of solid wastes, in particular to a sludge treatment agent prepared from sludge, which is used for sludge treatment and disposal to reduce the content of cadmium in the sludge.
Background
At present, the urban sludge has huge yield and higher water content, the water content of the factory sludge is generally about 80%, and meanwhile, the sludge contains more harmful components such as parasitic ova, germs, heavy metals and the like. The main disposal modes of the municipal sludge comprise landfill, incineration, land utilization and the like, and the domestic main disposal mode is landfill at present. Due to the fact that the sludge is high in water content and contains various toxic components, the sludge can cause extremely adverse effects on land after being buried, and the sludge has the advantages of odor diffusion, disease transmission, underground water pollution, heavy metal enrichment and migration and the like. Therefore, it is very important to reduce the content of harmful heavy metals in sludge by treating the sludge before its disposal. Cadmium in common heavy metals in sludge is the highest ecological risk, so the invention mainly aims at reducing the content of cadmium in sludge. At present, a plurality of processes for reducing heavy metals in sludge are available, the application 200910025858.2 adopts a bioleaching method to dissolve copper in sludge, a solvent extraction method is adopted to separate and enrich copper in leaching solution, and an electrodeposition copper precipitation technology is adopted to recover metal copper, the application 202010498726.8 adopts a method and a device for electrically enhancing stabilization of heavy metals in anaerobic fermentation sludge, magnetized water, humus, nano iron and domesticated microorganism bacterium liquid are stirred and mixed uniformly with urban dewatered sludge treated by an A2/O process in a regulating tank, the sludge is subjected to medium-temperature anaerobic fermentation, methane is collected, and stabilization of heavy metals is realized. The invention application CN201911067085.4 designs an iron-sulfur nutrient slow-release ball for sludge heavy metal biological leaching, which is used for sludge heavy metal biological leaching and provides long-acting stable S, Fe nutrition for thiobacillus depended by sludge heavy metal treatment, thereby improving the efficiency of removing heavy metal by the thiobacillus.
Along with the continuous optimization of the sludge treatment process, the sludge treatment effect is greatly improved, but in the comprehensive view, the method has the defects of complex operation, high energy consumption and material consumption, unstable effect and high raw material cost.
Disclosure of Invention
The invention aims to provide a sludge reduction and attenuation treating agent. The treating agent comprises an A part and a B part, wherein the A part is obtained by naturally drying municipal sludge, grinding, sieving and drying in a tubular furnace at 300-400 ℃ for 2-3 hours; the B part is composed of Thiobacillus ferrooxidans and Thiobacillus thiooxidans separated from sludge, and the final treating agent is prepared by fixing the B part on the A part by an immobilization means. The immobilization process comprises weighing the sterilized part A, placing the part A into a conical flask, adding a proper amount of the cultured part B, sealing the conical flask, oscillating the conical flask at the speed of 100-150 rpm at 25-30 ℃ for 20-30 hours, and screening the final product through a 200-mesh nylon screen.
The amount of B loaded on A is 45% -50%, namely 45% -50% of active bacterial liquid and 55% -50% of 9K culture medium.
The mass ratio of A to B is 3: 1-3: 1.5.
the sludge decrement and attenuation treating agent is applied to the sludge after gravity precipitation in the process of reducing the content of heavy metal cadmium in the sludge and the water content of the sludge, the sludge is added with the sludge decrement and attenuation treating agent, and the sludge decrement and attenuation treating agent is stirred for 8 to 12 days at normal temperature in an aeration state and filtered to obtain a mud cake with reduced cadmium content and water content, so that the purposes of reducing the cadmium content in the sludge, the water content of the sludge and the quantity of germs in the sludge are achieved.
The solid content of the treated sludge is 8-12%.
The method can promote the release of the combined water in the sludge, reduce the water content of the sludge, reduce bacteria in the sludge and reduce the content of heavy metal cadmium in the sludge, thereby weakening the toxicity of the sludge; the method promotes the neutralization and utilization of the sludge, improves the safety of subsequent resource utilization of the treated sludge, and promotes the harmlessness and reduction of the sludge.
And (3) determining the content of heavy metal cadmium in the sludge and the sludge supernatant and the content ratio of heavy metal cadmium in different forms in the sludge cake according to related standards, and analyzing the content of bacteria in the sludge and the change of the content of heavy metal cadmium.
The invention has the advantages and technical effects that:
the sludge in the invention is derived from excess sludge of a sewage treatment plant, is solid waste with larger output at present, contains a large amount of carbon elements, can form a large amount of pore structures after being subjected to temperature rise treatment, is a good material for subsequent microorganism loading, and has higher suitability for treating the sludge and no influence on subsequent resource utilization of the treated sludge because other substances are basically not introduced into the sludge in the later application. Because the surface of the sludge-based biochar has rich pore structures and functional groups, some target heavy metals can be adsorbed in the sludge treatment process, and the treatment effect on cadmium in the sludge is improved;
secondly, the thiobacillus ferrooxidans and thiobacillus thiooxidans adopted by the invention are acidophilic bacteria, and can generate partial organic acid in the growth process to form an acid environment, so that acid-fast germs in the sludge can be reduced, and the safety of subsequent recycling of the treated sludge is improved.
The invention is obtained by loading a B part consisting of thiobacillus ferrooxidans and thiobacillus thiooxidans separated from sludge on an A part obtained by naturally drying municipal sludge by an immobilization means, grinding, sieving and drying in a tubular furnace at 300-400 ℃ for 2-3 hours, wherein the immobilization process comprises the steps of weighing the sterilized A part, placing the A part in a conical flask, adding a proper amount of cultured B part, sealing the conical flask, oscillating the conical flask at the speed of 100 plus 150 rpm at 25-30 ℃ for 20-30 hours, and screening a final product by a 200-mesh nylon screen. The final product is used for treating the sludge, so that the release of the combined water in the sludge can be effectively promoted, the water content of the sludge is reduced, bacteria in the sludge can be killed, the content of heavy metal cadmium in the sludge is reduced, the water content of the sludge is reduced, and the toxicity of the sludge is reduced; the method provides a feasible outlet for the comprehensive utilization of the solid waste sludge, effectively promotes the reduction and the harmlessness of the sludge, and provides a proposal for the subsequent resource utilization of the sludge.
Raw materials used by the method are solid wastes, so that material consumption is reduced; meanwhile, the preparation method of the sludge reduction and attenuation treating agent is simple and easy to implement, is simple and convenient to operate, has low production cost, and embodies the environmental protection idea of treating wastes with wastes.
Detailed Description
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to the examples.
In the following examples, untreated sludge was taken from a gravity concentration tank of a sewage treatment plant, and the untreated sludge was subjected to pressure filtration at-0.075 MPa to obtain sludge cake having a water content of 96.3% and a heavy metal cadmium content of 60.579mg/kg, which exceeds the utilization of sludge in garden greenlands, which is about 3 times of the standard for brick use in agriculture, wherein the distribution of the heavy metal cadmium is 2% in an exchangeable state, the carbonate binding state of 1% of a ferrimanganic oxide binding state of 80% in an organic binding state of 14% in a residue state of 3%, and the main form of the sludge is a ferrimanganic oxide binding state (unstable state).
Example 1: the sludge treatment agent and the method for reducing the water content and the toxicity of the sludge thereof have the following specific operations:
air-drying and grinding the sludge, sieving the ground sludge by a sieve of 100 meshes, placing the ground sludge in a tubular furnace, drying the ground sludge for 3 hours to obtain sludge-based biochar, and then loading the thiobacillus ferrooxidans and thiobacillus thiooxidans separated from the sludge on the sludge-based biochar obtained by drying the tubular furnace, wherein the amount of the loaded bacterial liquid is 50 percent, namely the ratio of the stable active bacterial liquid to the 9K culture medium is 1: 1, obtaining a sludge synergistic decrement and attenuation treatment agent by using a load bacterial liquid and sludge-based biochar, adding the treatment agent into sludge with a solid content of about 8%, simultaneously carrying out aeration treatment and stirring, and filtering after 8 days to obtain a sludge cake with reduced water content and cadmium content, wherein the cadmium content in the sludge is reduced by 70% through determination.
Example 2: the sludge treatment agent and the method for reducing the water content and the toxicity of the sludge thereof have the following specific operations:
air-drying and grinding the sludge, sieving the ground sludge by a 200-mesh sieve, placing the ground sludge in a tubular furnace, drying the ground sludge for 2 hours to obtain sludge-based biochar, and then loading the thiobacillus ferrooxidans and thiobacillus thiooxidans separated from the sludge on the sludge-based biochar obtained by drying the tubular furnace, wherein the amount of the loaded bacterial liquid is 40 percent, namely the ratio of the stable active bacterial liquid to the 9K culture medium is 2: and 3, obtaining a sludge synergistic reduction and attenuation treating agent by using the load bacterial liquid and the sludge-based biochar, adding the treating agent into sludge with the solid content of about 12%, stirring simultaneously, filtering after 8 days to obtain a sludge cake with the water content and the cadmium content reduced, and measuring the cadmium content in the sludge to be reduced by 60%.
Example 3: the sludge treatment agent and the method for reducing the water content and the toxicity of the sludge thereof have the following specific operations:
air-drying and grinding the sludge, sieving the ground sludge by a 200-mesh sieve, placing the ground sludge in a tubular furnace, drying the ground sludge for 3 hours to obtain sludge-based biochar, and then loading the thiobacillus ferrooxidans and thiobacillus thiooxidans separated from the sludge on the sludge-based biochar obtained by drying the tubular furnace, wherein the amount of a loading bacterial liquid is 50 percent, namely the ratio of a stable active bacterial liquid to a 9K culture medium is 1: 1, obtaining a sludge synergistic decrement and attenuation treatment agent by using a load bacterial liquid and sludge-based biochar, adding the treatment agent into sludge with a solid content of about 8%, simultaneously performing aeration treatment and stirring, and filtering after 8 days to obtain sludge cakes with reduced water content and cadmium content, wherein the cadmium content in the sludge is reduced by 75% by determination.
Claims (6)
1. A sludge synergistic decrement attenuation treatment agent is characterized in that: comprises two parts of A and B;
the part A is obtained by naturally drying municipal sludge, grinding, sieving and drying in a tubular furnace for 2-3 hours at 300-400 ℃;
the part B consists of thiobacillus ferrooxidans and thiobacillus thiooxidans which are separated from sludge;
a synergistic attenuation treating agent for sludge is prepared through immobilizing part B on part A by immobilizing means.
2. The agent for reducing and attenuating sludge as set forth in claim 1, wherein: the process that the part B is fixed on the part A through the immobilization means is to weigh the sterilized part A and place the part A into a conical flask, add a proper amount of the cultured part B, seal the conical flask, shake the conical flask at the speed of 100-.
3. The agent for reducing sludge volume and reducing toxicity according to claim 1, wherein: the amount of B loaded on A is 40% -50%, namely 40% -50% of active bacterial liquid and 60% -50% of 9K culture medium.
4. The agent for reducing sludge volume and reducing toxicity according to claim 1, wherein: the mass ratio of A to B is 3: 1-3: 1.5.
5. the use of the sludge treatment agent according to claim 1 for reducing the water content of sludge and the toxicity of sludge, wherein: the sludge after gravity precipitation is added with the sludge synergistic decrement and attenuation treatment agent, stirred for 8-12 days at normal temperature under the aeration state, and filtered to obtain a mud cake with reduced cadmium content and lower water content, so that the aims of reducing the cadmium content in the sludge, the water content of the sludge and the amount of germs in the sludge are fulfilled.
6. Use according to claim 5, characterized in that: the solid content of the treated sludge is 8-12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549552.2A CN115093088A (en) | 2022-05-20 | 2022-05-20 | Preparation method of sludge synergistic decrement attenuation treatment agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549552.2A CN115093088A (en) | 2022-05-20 | 2022-05-20 | Preparation method of sludge synergistic decrement attenuation treatment agent |
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| Publication Number | Publication Date |
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| CN115093088A true CN115093088A (en) | 2022-09-23 |
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| CN202210549552.2A Pending CN115093088A (en) | 2022-05-20 | 2022-05-20 | Preparation method of sludge synergistic decrement attenuation treatment agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062961A (en) * | 2023-03-23 | 2023-05-05 | 昆明理工大学 | Sludge biochar nutrient medium and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486097A (en) * | 2018-05-17 | 2018-09-04 | 浙江大学 | The dual immobilization biological matter charcoal particle of sulphur-bacterium and preparation and bioleaching method |
| CN109052886A (en) * | 2018-09-13 | 2018-12-21 | 成都碧青环保科技有限公司 | A method of removal Heavy Metals in Sludge |
| CN112275788A (en) * | 2020-09-27 | 2021-01-29 | 东华大学 | Method for solidifying and stabilizing heavy metal ions in soil by using sludge-based biochar |
-
2022
- 2022-05-20 CN CN202210549552.2A patent/CN115093088A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108486097A (en) * | 2018-05-17 | 2018-09-04 | 浙江大学 | The dual immobilization biological matter charcoal particle of sulphur-bacterium and preparation and bioleaching method |
| CN109052886A (en) * | 2018-09-13 | 2018-12-21 | 成都碧青环保科技有限公司 | A method of removal Heavy Metals in Sludge |
| CN112275788A (en) * | 2020-09-27 | 2021-01-29 | 东华大学 | Method for solidifying and stabilizing heavy metal ions in soil by using sludge-based biochar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116062961A (en) * | 2023-03-23 | 2023-05-05 | 昆明理工大学 | Sludge biochar nutrient medium and preparation method and application thereof |
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