CN112209586A - Method for extracting COD from excess sludge - Google Patents
Method for extracting COD from excess sludge Download PDFInfo
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- CN112209586A CN112209586A CN202010904372.2A CN202010904372A CN112209586A CN 112209586 A CN112209586 A CN 112209586A CN 202010904372 A CN202010904372 A CN 202010904372A CN 112209586 A CN112209586 A CN 112209586A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to a method for extracting COD from excess sludge. When the excess sludge is subjected to thermokalite treatment, the invention adds the cell wall decomposition additive consisting of the cell wall decomposition agent, the alkali-resisting agent and the fragmentation neutralizer, and matches with a proper thermokalite process mode, thereby achieving the effect that the organic matters in the excess sludge are decomposed to the maximum extent and are recycled after entering the supernatant. The invention has the advantages of thorough microbial cell disintegration degree in the excess sludge, high proportion of extracellular polymer dissolved into the supernatant, no influence of the additive on the recycling operation of the carbon source in the supernatant, thorough damage and decomposition of the cell wall of the microorganism by the cell wall disintegration additive, simple and efficient integral thermokalite operation, greatly reduced discharge amount of the excess sludge and greatly reduced harmful microbial discharge risk of the excess sludge.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a method for extracting COD from excess sludge.
Background
Sewage treatment plants commonly use an activated sludge process to treat various types of sewage, microorganisms in the sludge realize self-growth while removing pollutants in water, and simultaneously generate a large amount of excess sludge. According to prediction, the output of surplus sludge in China reaches 8000 million tons by 2020, and the surplus activated sludge contains a large amount of organic substances and abundant nutrient substances, and also contains factors such as pathogenic bacteria and parasite eggs which are easy to harm human health, and if the surplus activated sludge is discharged randomly without being stabilized, serious environmental problems are caused, so the surplus sludge must be treated and disposed.
In the prior art, a method for carrying out thermokalite treatment on excess sludge can be generally adopted to realize the purpose of enriching a carbon source in the treated supernatant, namely, COD is extracted in the invention, so that the amount of the excess sludge is reduced, the carbon source can be recycled as the carbon source in the microbial nitrogen and phosphorus removal link, and finally, the effect of recycling and comprehensively utilizing COD in the sludge is realized.
On the other hand, in the existing excess sludge thermal alkali treatment mode, the treatment additive is only alkali liquor, so that cell polysaccharides, lipopeptides, related lipid derivatives and the like on the surface of the cell wall cannot be completely shed and dissolved even if microbial cells die, the capacity of enriching a carbon source in a supernatant is reduced, and the final display effect is that the COD value in the supernatant is not large enough.
The patent publication No. CN 107265806A, Chinese patent application publication No. 2017.10.20 discloses a carbon source recycling-based excess sludge treatment process, which comprises the steps of firstly carrying out hot-alkali pretreatment on excess sludge, decomposing sludge cells, releasing macromolecular organic matters such as protein and polysaccharide into supernatant, then carrying out hydrolysis acidification on the sludge, and carrying out an acidic start (pH is 6) stage, so that the activity of acid-producing microorganisms is favorably maintained, the accumulation of VFAs is promoted, the activity of methanogenic bacteria can be inhibited through an alkaline fermentation (pH is 10) stage, VFAs are prevented from being consumed in the process of producing methane by the methanogenic bacteria, the acid-producing effect is kept stronger than the methane-producing effect, and the accumulation concentration of SCOD and VFAs in hydrolysis acidification liquid is greatly improved.
However, the hot alkali pretreatment step in the patent of the invention has the problems of incomplete decomposition effect on cells and relatively low proportion of macromolecular organic matters entering into supernatant.
Disclosure of Invention
The invention aims to provide a method for extracting COD from excess sludge, which can achieve the effect that organic matters in the excess sludge are decomposed to the maximum extent and are recycled after entering supernatant by adding a cell wall decomposition additive consisting of a cell wall decomposing agent, an alkali resisting agent and a crushing neutralizing agent when the excess sludge is subjected to thermokalification and matching with a proper thermokalification process. The invention has the advantages of thorough microbial cell disintegration degree in the excess sludge, high proportion of extracellular polymer dissolved into the supernatant, no influence of the additive on the recycling operation of the carbon source in the supernatant, thorough damage and decomposition of the cell wall of the microorganism by the cell wall disintegration additive, simple and efficient integral thermokalite operation, greatly reduced discharge amount of the excess sludge and greatly reduced harmful microbial discharge risk of the excess sludge.
The technical scheme adopted by the invention for solving the problems is as follows: a method for extracting COD from excess sludge sequentially comprises the following steps:
s1, mixing the excess sludge and the alkaline material in the reaction tank;
s2, heating and stirring the reaction tank, keeping stirring for 0.5-2 hours after heating to above 80 ℃, and then stopping stirring;
s3, standing and separating the materials in the reaction tank to obtain supernatant and deposited sludge;
s4, squeezing and dehydrating the deposited sludge to obtain filtrate and dry sludge, refluxing the filtrate and the supernatant in the S3 together for later use, and transporting the dry sludge outwards.
In the invention, the filtrate is also rich in organic polymers after microbial cell disruption, and can be used as a carbon source in the microbial nitrogen and phosphorus removal process in the subsequent sewage treatment together with the supernatant.
The further preferred technical scheme is as follows: in step S1, the water content of the excess sludge is 95% to 98%, the alkali material is solid sodium hydroxide or a sodium hydroxide solution with a solute mass fraction of 30% to 32%, and the mass ratio of the excess sludge to the solid sodium hydroxide is 100: (0.5-2.0), wherein the mass ratio of the excess sludge to 30-32% sodium hydroxide solution is 100: (1.5-6.0).
In the present invention, if the amount of sodium hydroxide is further excessive in the above-mentioned ratio, the improvement of the ability to kill microorganisms by itself is not significant, and the subsequent addition of the additive cannot effectively perform the cell wall disruption operation, whereas if the amount of sodium hydroxide is too small, the ability to kill microorganism cells by itself is weakened, and thus the above-mentioned ratio range is determined.
The further preferred technical scheme is as follows: in step S2, stirring is kept for 1.0-2.0h under the condition of heating to 80-90 ℃ and preserving heat, and stirring is kept for 0.5-1.0h under the condition of heating to 95-98 ℃ and preserving heat.
The further preferred technical scheme is as follows: in step S3, the standing separation time is 30-45 min.
The further preferred technical scheme is as follows: in step S4, the mass ratio of the dry sludge to the excess sludge is 1: (15-45); the COD value in the filtrate and the supernatant is 11200-18500 mg/L.
In the invention, the operation of the filter press is carried out by adopting a plate-and-frame filter press, and the excess sludge is pumped into the reaction tank from a sludge storage tank or a sludge concentration tank of a sewage treatment plant.
The further preferred technical scheme is as follows: in step S1, adding an additive for cell wall decomposition for breaking microbial cell walls and releasing extracellular polymers to supernatant as a carbon source for recovery into the excess sludge, wherein the additive for cell wall decomposition comprises a cell wall decomposition agent, an alkali-resistant agent and a breaking neutralizer.
The further preferred technical scheme is as follows: the cell wall decomposer is any one or a mixture of polyhydroxy tri-quaternary ammonium salt, hexamethylene chloride tri-quaternary ammonium salt and dialkyl polyoxyethylene tri-quaternary ammonium salt; the alkali-resistant agent is any one or a mixture of more of bentonite, organic montmorillonite and polyurethane elastic fiber; the crushing neutralizer is hollow microspheres prepared by mixing aluminum tripolyphosphate, stone micro powder and polyurethane.
In the invention, the cell wall decomposer adopts quaternary ammonium salt with increased cell wall permeability to ensure the basic effects of killing microbial cells and dissolving polymers on the cell wall into supernatant after decomposition, the alkali-resistant agent is used for compounding and modifying with the quaternary ammonium salt to avoid the quaternary ammonium salt from losing efficacy in the alkaline environment, and the final breaking neutralizer has three functions.
Firstly, the redundant quaternary ammonium salt is neutralized, so that the influence of residual quaternary ammonium salt on the high molecular organic matters as carbon sources in the supernatant is avoided, and the safety of the high molecular organic matters used by the denitrification and dephosphorization microorganisms is improved.
Secondly, the microspheres can further break the microbial cells in a physical breaking mode, and the effective release and dissolution of polymers on the cells are ensured.
Thirdly, the hollow microspheres can disperse the unexpectedly agglomerated bentonite and organic montmorillonite in a physical impact manner, so that the bentonite and the organic montmorillonite can be stably combined with quaternary ammonium salt in a large proportion and protect the quaternary ammonium salt in an alkaline environment.
The further preferred technical scheme is as follows: the particle size of the bentonite or the organic montmorillonite is 15-25 mu m, and the length-diameter ratio of the polyurethane elastic fiber is (750) -820): 1, the stone micro powder is any one of volcanic micro powder, dolomite micro powder or calcite micro powder, and the particle size of the hollow microspheres is 0.20-0.35 mm.
The further preferable technical scheme is that the preparation method of the hollow microsphere sequentially comprises the following steps:
s1, adding aluminum tripolyphosphate and stone micro powder into a vacuum crusher, and crushing to obtain fine materials with the particle size of 45-95 microns;
s2, adding part of polyurethane into the stirring reactor, adding the fine materials in the S1, stirring for 45-95min at the temperature of 75-125 ℃, and measuring the viscosity value;
s3, adding the rest polyurethane while stirring until the real-time viscosity reaches 8500-12000 Pa.s, and stopping stirring to obtain a mixture;
and S4, carrying out microwave heating foaming expansion treatment on the mixture, and cooling to obtain the hollow microspheres.
The further preferred technical scheme is as follows: in the microwave heating foaming expansion treatment, the microwave frequency is 2200-2560MHz, the temperature is 45-55 ℃, the foaming expansion time is 1.5-4.5min, and the cooling speed is 5-8 ℃/min.
In the invention, the microwave heating foaming expansion operation is adopted, so that polyurethane can be used as a binder and a foaming agent to finally obtain the pattern of the hollow microspheres, and the microspheres have the advantages of light weight, high hardness and good granularity uniformity.
When the excess sludge is subjected to thermokalite treatment, the invention adds the cell wall decomposition additive consisting of the cell wall decomposition agent, the alkali-resisting agent and the fragmentation neutralizer, and matches with a proper thermokalite process mode, thereby achieving the effect that the organic matters in the excess sludge are decomposed to the maximum extent and are recycled after entering the supernatant. The invention has the advantages of thorough microbial cell disintegration degree in the excess sludge, high proportion of extracellular polymer dissolved into the supernatant, no influence of the additive on the recycling operation of the carbon source in the supernatant, thorough damage and decomposition of the cell wall of the microorganism by the cell wall disintegration additive, simple and efficient integral thermokalite operation, greatly reduced discharge amount of the excess sludge and greatly reduced harmful microbial discharge risk of the excess sludge.
Detailed Description
The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Example 1
A method for extracting COD from excess sludge sequentially comprises the following steps:
s1, mixing the excess sludge and the alkaline material in the reaction tank;
s2, heating and stirring the reaction tank, heating to 85 ℃, keeping stirring for 1.5h, and then stopping stirring;
s3, standing and separating the materials in the reaction tank to obtain supernatant and deposited sludge;
s4, squeezing and dehydrating the deposited sludge to obtain filtrate and dry sludge, refluxing the filtrate and the supernatant in the S3 together for later use, and transporting the dry sludge outwards.
In step S1, the water content of the excess sludge is 98%, the alkaline material is solid sodium hydroxide, and the mass ratio of the excess sludge to the solid sodium hydroxide is 100: 0.5.
in step S3, the time for standing separation was 30 min.
In step S4, the mass ratio of the dry sludge to the excess sludge is 1: 26; the COD value in the filtrate as well as in the supernatant was 11500 mg/L.
In step S1, adding an additive for cell wall decomposition for breaking microbial cell walls and releasing extracellular polymers to supernatant as a carbon source for recovery into the excess sludge, wherein the additive for cell wall decomposition comprises a cell wall decomposition agent, an alkali-resistant agent and a breaking neutralizer.
The cell wall decomposer is polyhydroxy tri-quaternary ammonium salt; the alkali-resistant agent is bentonite; the crushing neutralizer is hollow microspheres prepared by mixing aluminum tripolyphosphate, stone micro powder and polyurethane.
The particle size of the bentonite is 20 mu m, the stone micro powder is volcanic rock micro powder, and the particle size of the hollow microspheres is 0.22 mm.
The preparation method of the hollow microsphere sequentially comprises the following steps:
s1, adding aluminum tripolyphosphate and stone micro powder into a vacuum crusher, and crushing to obtain fine materials with the particle size of 60 mu m;
s2, adding part of polyurethane into the stirring reactor, adding the fine materials in the S1, stirring for 48min at the temperature of 82 ℃, and measuring the viscosity value;
s3, adding the rest polyurethane while stirring until the real-time viscosity reaches 9000 Pa.s, and stopping stirring to obtain a mixture;
and S4, carrying out microwave heating foaming expansion treatment on the mixture, and cooling to obtain the hollow microspheres.
In the microwave heating foaming expansion treatment, the microwave frequency is 2250MHz, the temperature is 45 ℃, the foaming expansion time is 2min, and the cooling speed is 5 ℃/min.
In this embodiment, the supernatant obtained finally is used as a carbon source for the subsequent denitrification and dephosphorization operations of microorganisms after the filtrate is added, so as to ensure the comprehensive utilization effect of the excess sludge.
Example 2
A method for extracting COD from excess sludge sequentially comprises the following steps:
s1, mixing the excess sludge and the alkaline material in the reaction tank;
s2, heating and stirring the reaction tank, heating to 96 ℃, keeping stirring for 0.5h, and then stopping stirring;
s3, standing and separating the materials in the reaction tank to obtain supernatant and deposited sludge;
s4, squeezing and dehydrating the deposited sludge to obtain filtrate and dry sludge, refluxing the filtrate and the supernatant in the S3 together for later use, and transporting the dry sludge outwards.
In step S1, the water content of the excess sludge is 95%, the alkali material is 30% sodium hydroxide solution, and the mass ratio of the excess sludge to the 30% sodium hydroxide solution is 100: 2.5.
in step S3, the time for standing separation was 40 min.
In step S4, the mass ratio of the dry sludge to the excess sludge is 1: 35; the COD value in the filtrate and supernatant was 14020 mg/L.
In step S1, adding an additive for cell wall decomposition for breaking microbial cell walls and releasing extracellular polymers to supernatant as a carbon source for recovery into the excess sludge, wherein the additive for cell wall decomposition comprises a cell wall decomposition agent, an alkali-resistant agent and a breaking neutralizer.
The cell wall decomposer is hexamethylene chloride tri-quaternary ammonium salt; the alkali-resistant agent is organic montmorillonite; the crushing neutralizer is hollow microspheres prepared by mixing aluminum tripolyphosphate, stone micro powder and polyurethane.
The particle size of the bentonite is 20 mu m, the stone micro powder is calcite micro powder, and the particle size of the hollow microspheres is 0.32 mm.
The preparation method of the hollow microsphere sequentially comprises the following steps:
s1, adding aluminum tripolyphosphate and stone micro powder into a vacuum crusher, and crushing to obtain fine materials with the particle size of 60 mu m;
s2, adding part of polyurethane into the stirring reactor, adding the fine materials in the S1, stirring for 60min at the temperature of 100 ℃, and measuring the viscosity value;
s3, adding the rest polyurethane while stirring until the real-time viscosity reaches 10000 Pa.s, and stopping stirring to obtain a mixture;
and S4, carrying out microwave heating foaming expansion treatment on the mixture, and cooling to obtain the hollow microspheres.
In the microwave heating foaming expansion treatment, the microwave frequency is 2550MHz, the temperature is 45 ℃, the foaming expansion time is 4min, and the cooling speed is 6 ℃/min.
In this embodiment, the supernatant obtained finally is used as a carbon source for the subsequent denitrification and dephosphorization operations of microorganisms after the filtrate is added, so as to ensure the comprehensive utilization effect of the excess sludge.
Example 3
A method for extracting COD from excess sludge sequentially comprises the following steps:
s1, mixing the excess sludge and the alkaline material in the reaction tank;
s2, heating and stirring the reaction tank, keeping stirring for 0.5h after heating to 98 ℃, and then stopping stirring;
s3, standing and separating the materials in the reaction tank to obtain supernatant and deposited sludge;
s4, squeezing and dehydrating the deposited sludge to obtain filtrate and dry sludge, refluxing the filtrate and the supernatant in the S3 together for later use, and transporting the dry sludge outwards.
In step S1, the water content of the excess sludge is 95%, the alkali material is 30% sodium hydroxide solution, and the mass ratio of the excess sludge to the 30% sodium hydroxide solution is 100: 5.5.
in step S3, the time for standing separation was 45 min.
In step S4, the mass ratio of the dry sludge to the excess sludge is 1: 42; the COD value in the filtrate and the supernatant was 16500 mg/L.
In step S1, adding an additive for cell wall decomposition for breaking microbial cell walls and releasing extracellular polymers to supernatant as a carbon source for recovery into the excess sludge, wherein the additive for cell wall decomposition comprises a cell wall decomposition agent, an alkali-resistant agent and a breaking neutralizer.
The cell wall decomposer is dialkyl polyoxyethylene tri-quaternary ammonium salt; the alkali-resistant agent is polyurethane elastic fiber; the crushing neutralizer is hollow microspheres prepared by mixing aluminum tripolyphosphate, stone micro powder and polyurethane.
The length-diameter ratio of the polyurethane elastic fiber is 760: 1, the stone micro powder is calcite micro powder, and the particle size of the hollow microspheres is 0.35 mm.
The preparation method of the hollow microsphere sequentially comprises the following steps:
s1, adding aluminum tripolyphosphate and stone micro powder into a vacuum crusher, and crushing to obtain fine materials with the particle size of 80 microns;
s2, adding part of polyurethane into the stirring reactor, adding the fine materials in the S1, stirring for 85min at the temperature of 120 ℃, and measuring the viscosity value;
s3, adding the rest polyurethane while stirring until the real-time viscosity reaches 12000 Pa.s, and stopping stirring to obtain a mixture;
and S4, carrying out microwave heating foaming expansion treatment on the mixture, and cooling to obtain the hollow microspheres.
In the microwave heating foaming expansion treatment, the microwave frequency is 2560MHz, the temperature is 50 ℃, the foaming expansion time is 4min, and the cooling speed is 8 ℃/min.
In this embodiment, the supernatant obtained finally is used as a carbon source for the subsequent denitrification and dephosphorization operations of microorganisms after the filtrate is added, so as to ensure the comprehensive utilization effect of the excess sludge.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.
Claims (10)
1. A method for extracting COD from excess sludge is characterized by sequentially comprising the following steps:
s1, mixing the excess sludge and the alkaline material in the reaction tank;
s2, heating and stirring the reaction tank, keeping stirring for 0.5-2 hours after heating to above 80 ℃, and then stopping stirring;
s3, standing and separating the materials in the reaction tank to obtain supernatant and deposited sludge;
s4, squeezing and dehydrating the deposited sludge to obtain filtrate and dry sludge, refluxing the filtrate and the supernatant in the S3 together for later use, and transporting the dry sludge outwards.
2. The method for extracting COD from excess sludge according to claim 1, characterized in that: in step S1, the water content of the excess sludge is 95% to 98%, the alkali material is solid sodium hydroxide or a sodium hydroxide solution with a solute mass fraction of 30% to 32%, and the mass ratio of the excess sludge to the solid sodium hydroxide is 100: (0.5-2.0), wherein the mass ratio of the excess sludge to 30-32% sodium hydroxide solution is 100: (1.5-6.0).
3. The method for extracting COD from excess sludge according to claim 1, characterized in that: in step S2, stirring is kept for 1.0-2.0h under the condition of heating to 80-90 ℃ and preserving heat, and stirring is kept for 0.5-1.0h under the condition of heating to 95-98 ℃ and preserving heat.
4. The method for extracting COD from excess sludge according to claim 1, characterized in that: in step S3, the standing separation time is 30-45 min.
5. The method for extracting COD from excess sludge according to claim 1, characterized in that: in step S4, the mass ratio of the dry sludge to the excess sludge is 1: (15-45); the COD value in the filtrate and the supernatant is 11200-18500 mg/L.
6. The method for extracting COD from excess sludge according to claim 1, characterized in that: in step S1, adding an additive for cell wall decomposition for breaking microbial cell walls and releasing extracellular polymers to supernatant as a carbon source for recovery into the excess sludge, wherein the additive for cell wall decomposition comprises a cell wall decomposition agent, an alkali-resistant agent and a breaking neutralizer.
7. The method for extracting COD from excess sludge according to claim 6, characterized in that: the cell wall decomposer is any one or a mixture of polyhydroxy tri-quaternary ammonium salt, hexamethylene chloride tri-quaternary ammonium salt and dialkyl polyoxyethylene tri-quaternary ammonium salt; the alkali-resistant agent is any one or a mixture of more of bentonite, organic montmorillonite and polyurethane elastic fiber; the crushing neutralizer is hollow microspheres prepared by mixing aluminum tripolyphosphate, stone micro powder and polyurethane.
8. The method for extracting COD from excess sludge according to claim 7, wherein: the particle size of the bentonite or the organic montmorillonite is 15-25 mu m, and the length-diameter ratio of the polyurethane elastic fiber is (750) -820): 1, the stone micro powder is any one of volcanic micro powder, dolomite micro powder or calcite micro powder, and the particle size of the hollow microspheres is 0.20-0.35 mm.
9. The method for extracting COD from excess sludge according to claim 7, characterized in that the preparation method of the hollow microspheres comprises the following steps in sequence:
s1, adding aluminum tripolyphosphate and stone micro powder into a vacuum crusher, and crushing to obtain fine materials with the particle size of 45-95 microns;
s2, adding part of polyurethane into the stirring reactor, adding the fine materials in the S1, stirring for 45-95min at the temperature of 75-125 ℃, and measuring the viscosity value;
s3, adding the rest polyurethane while stirring until the real-time viscosity reaches 8500-12000 Pa.s, and stopping stirring to obtain a mixture;
and S4, carrying out microwave heating foaming expansion treatment on the mixture, and cooling to obtain the hollow microspheres.
10. The method for extracting COD from excess sludge according to claim 9, wherein: in the microwave heating foaming expansion treatment, the microwave frequency is 2200-2560MHz, the temperature is 45-55 ℃, the foaming expansion time is 1.5-4.5min, and the cooling speed is 5-8 ℃/min.
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| CN202010904372.2A CN112209586A (en) | 2020-09-01 | 2020-09-01 | Method for extracting COD from excess sludge |
| PCT/CN2021/096733 WO2022048206A1 (en) | 2020-09-01 | 2021-05-28 | Method for extracting cod from excess sludge |
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|---|---|---|---|---|
| WO2022048206A1 (en) * | 2020-09-01 | 2022-03-10 | 浙江湖州金洁水务股份有限公司 | Method for extracting cod from excess sludge |
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| CN114735911A (en) * | 2022-03-23 | 2022-07-12 | 东华工程科技股份有限公司 | Method for in-situ resource utilization of excess sludge in chemical industrial park |
| CN115304227B (en) * | 2022-07-15 | 2023-12-15 | 中国地质大学（武汉） | Analysis method for molecular composition of soluble organic matters in sludge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708696A (en) * | 2013-12-20 | 2014-04-09 | 华南理工大学 | Method for fast producing methane by utilizing excess sludge |
| CN105366909A (en) * | 2015-11-11 | 2016-03-02 | 中国电建集团中南勘测设计研究院有限公司 | Sludge deep-dehydration technology |
| CN110117148A (en) * | 2019-05-24 | 2019-08-13 | 苏州达道环保科技有限公司 | A kind of the low temperature thermokalite digestion procedure and its reaction unit of sewage plant biochemical sludge |
| CN110437497A (en) * | 2019-08-12 | 2019-11-12 | 北京建筑大学 | The method intracellular recycled simultaneously with Exo-biopolymer in excess sludge |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3756827B2 (en) * | 2002-02-25 | 2006-03-15 | 株式会社サピエナント | Sludge reduction method and apparatus |
| CN103030259B (en) * | 2013-01-07 | 2014-03-26 | 北京科技大学 | Method for conditioning and dehydrating residual sludge |
| CN105585231A (en) * | 2014-11-04 | 2016-05-18 | 中国石油化工股份有限公司 | Sludge reduction method with ultrasonic and alkali treatment |
| CN107055986B (en) * | 2016-12-23 | 2020-06-16 | 北京建筑大学 | High-pressure microwave sludge pretreatment method |
| CN107265806B (en) * | 2017-08-07 | 2020-12-04 | 深圳市海源能源科技有限公司 | Excess sludge treatment process based on carbon source recycling |
| CN109095751B (en) * | 2018-09-13 | 2021-08-03 | 左健 | Method for treating activated sludge through lower-temperature thermokalite decomposition |
| CN112209586A (en) * | 2020-09-01 | 2021-01-12 | 浙江湖州金洁水务股份有限公司 | Method for extracting COD from excess sludge |
-
2020
- 2020-09-01 CN CN202010904372.2A patent/CN112209586A/en active Pending
-
2021
- 2021-05-28 WO PCT/CN2021/096733 patent/WO2022048206A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708696A (en) * | 2013-12-20 | 2014-04-09 | 华南理工大学 | Method for fast producing methane by utilizing excess sludge |
| CN105366909A (en) * | 2015-11-11 | 2016-03-02 | 中国电建集团中南勘测设计研究院有限公司 | Sludge deep-dehydration technology |
| CN110117148A (en) * | 2019-05-24 | 2019-08-13 | 苏州达道环保科技有限公司 | A kind of the low temperature thermokalite digestion procedure and its reaction unit of sewage plant biochemical sludge |
| CN110437497A (en) * | 2019-08-12 | 2019-11-12 | 北京建筑大学 | The method intracellular recycled simultaneously with Exo-biopolymer in excess sludge |
Non-Patent Citations (2)
| Title |
|---|
| 姜礼燔 等: "《鱼虾蟹疾病防治新技术》", 31 January 2014, 金盾出版社 * |
| 朱灵峰 等: "《应用化学专业实验》", 31 August 2012, 哈尔滨工业大学出版社 * |
Cited By (1)
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| WO2022048206A1 (en) * | 2020-09-01 | 2022-03-10 | 浙江湖州金洁水务股份有限公司 | Method for extracting cod from excess sludge |
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