CN108862975A - A kind of sludge anaerobic processing method and system - Google Patents
A kind of sludge anaerobic processing method and system Download PDFInfo
- Publication number
- CN108862975A CN108862975A CN201811099938.8A CN201811099938A CN108862975A CN 108862975 A CN108862975 A CN 108862975A CN 201811099938 A CN201811099938 A CN 201811099938A CN 108862975 A CN108862975 A CN 108862975A
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- Prior art keywords
- sludge
- pyrohydrolysis
- pond
- outlet
- anaerobic
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- 239000010802 sludge Substances 0.000 title claims abstract description 99
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 230000029087 digestion Effects 0.000 claims abstract description 36
- 239000005416 organic matter Substances 0.000 claims abstract description 24
- 230000003750 conditioning effect Effects 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 230000007062 hydrolysis Effects 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000010801 sewage sludge Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001079 digestive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- 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
Abstract
The present invention provides a kind of sludge anaerobic processing method and system, it is high for the content of organic matter in conventional anaerobic digestion biogas residue, the big problem of biogas residue yield carries out pyrohydrolysis pretreatment to sludge, hydrolyzate is used for anaerobic digestion, biogas residue is back to pyrohydrolysis stage, pyrohydrolysis sludge outlet has outlet sludge quantity few, and outlet moisture percentage in sewage sludge is low, the outlet sludge content of organic matter is low, and system produces the high advantage of biogas rate.
Description
Technical field
The present invention relates to sludge treatment field more particularly to a kind of sludge anaerobic processing methods and system.
Background technique
Sludge is the by-product of sewage treatment, and yield is big and disposition rate is low, and China's Treatment of Sludge mode mainly has landfill, heap
The modes such as fertilizer, natural desiccation, burning.Treatment of Sludge mode in China's is still based on landfill at present, China's urban wastewater treatment in addition
Enterprise's disposing capacity is insufficient, disposition means fall behind, and the processing that a large amount of sludge are not standardized directly results in " secondary dirt
Dye " seriously threatens ecological environment generation, not only reduces the effective processing capacity of sewage treatment facility, and to ecological ring
Border constitutes a serious threat, while also resulting in the significant wastage of resource.Anaerobic sludge digestion is carried out using amphimicrobe and anaerobic bacteria
Anaerobic biochemical reaction decomposes the organic substance in sludge, realizes a kind of sludge treatment technique of sludge stabilizing, dirt may be implemented
The minimizing of mud processing, stabilisation, innoxious and recycling, reduce greenhouse gas emission, treatment scale is bigger, process synthesis
Benefit is more obvious.
Anaerobic digestion generates biogas while removing organic matter, that there are digestive efficiencies is low for traditional anaerobic digestion process,
The problems such as residence time is long, operating cost is high, this is because sludge hydrolytic process limits the speed of anaerobic digestion, sludge hot water
Solution is a kind of efficient sludge pre-treatment techniques, and the dehydration of sludge is improved while effectively improving digestive efficiency and biogas output
Performance.However, the content of organic matter is still higher in pyrohydrolysis sludge anaerobic biogas residue, and since content of beary metal is high, organic matter contains
Amount is high, can not resource utilization.
Summary of the invention
The present invention provides a kind of sludge anaerobic processing method and system, for the content of organic matter in conventional anaerobic digestion biogas residue
Height, the big problem of biogas residue yield carry out pyrohydrolysis pretreatment to sludge, hydrolyzate are used for anaerobic digestion, biogas residue is back to heat
Hydrolysis stage, pyrohydrolysis sludge outlet have outlet sludge quantity few, and outlet moisture percentage in sewage sludge is low, the outlet sludge content of organic matter
Low, system produces the high advantage of biogas rate.
The technical solution adopted by the present invention is that：
A kind of sludge anaerobic processing method, includes the following steps：
Municipal sludge progress is quenched, adjusts its moisture content to 90% ~ 93%；Sludge after quenched carries out pyrohydrolysis, by sludge solid phase
In organic matter be discharged into liquid phase；Sludge after pyrohydrolysis is dehydrated, the aqueous solution of abjection after conditioning after disappear into sludge
Change pond and carry out anaerobic digestion, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, and biogas residue is discharged, biogas residue into
Enter to re-start pyrohydrolysis reaction in pyrohydrolysis pond；Biogas slurry a part of anaerobic digestion discharge enters quenched pond and is used for conditioning of mud
Moisture content, a part qualified discharge after sewage treatment.
Preferably, the pH of the pyrohydrolysis reaction is 7.5 to 11.
Preferably, the pH of the sludge digestion reaction is 7 to 9.
A kind of sludge anaerobic processing system, including：
Quenched pond is used for conditioning of mud moisture content；Pyrohydrolysis pond is used for sludge hot hydrolysis, import and the quenched pond
Outlet is connected；Dehydration device, is used for pyrohydrolysis sludge dewatering, and import is connected with pyrohydrolysis pond outlet；Conditioner,
The conditioning of hydrolyzate for the abjection of pyrohydrolysis sludge, import are connected with the liquid outlet of the dehydration device；Sludge disappears
Change pond, reacted for anaerobic sludge digestion, import is connected with the outlet of the conditioner, solid outlet and the hot water
Xie Chi is connected, and liquid outlet is connected with the quenched pond；Sewage-treatment plant, import and the sludge digestion tank liquid
Body outlet is connected.
Beneficial effects of the present invention are：
1, the present invention provides a kind of sludge anaerobic processing method and system, after carrying out pyrohydrolysis processing to sludge, will hydrolyze
Liquid is reacted for anaerobic digestion, had both been improved the efficiency that organic matter is converted into methane, and had been also reduced anaerobism tank volume.
2, the content of organic matter is higher in anaerobism biogas residue, is back to pyrohydrolysis stage, and the organic matter in system obtains further
It utilizes, improves the total yield methane quantity of system.
3, the content of organic matter is lower in the sludge after pyrohydrolysis, and the dehydration property after pyrohydrolysis is good, hot water
Outlet sludge of the sludge as whole system after solution, has the characteristics that yield is few, the content of organic matter is low, dehydration property is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of sludge anaerobic processing system of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The technical solution adopted by the present invention is that：
A kind of sludge anaerobic processing method, includes the following steps：
Municipal sludge progress is quenched, adjusts its moisture content to 90% ~ 93%；Sludge after quenched carries out pyrohydrolysis, by sludge solid phase
In organic matter be discharged into liquid phase；Sludge after pyrohydrolysis is dehydrated, the aqueous solution of abjection after conditioning after disappear into sludge
Change pond and carry out anaerobic digestion, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, and biogas residue is discharged, biogas residue into
Enter to re-start pyrohydrolysis reaction in pyrohydrolysis pond；Biogas slurry a part of anaerobic digestion discharge enters quenched pond and is used for conditioning of mud
Moisture content, a part qualified discharge after sewage treatment.
Preferably, the pH of the pyrohydrolysis reaction is 7.5 to 11.
Preferably, the pH of the sludge digestion reaction is 7 to 9.
A kind of sludge anaerobic processing system, including：
Quenched pond is used for conditioning of mud moisture content；Pyrohydrolysis pond is used for sludge hot hydrolysis, import and the quenched pond
Outlet is connected；Dehydration device, is used for pyrohydrolysis sludge dewatering, and import is connected with pyrohydrolysis pond outlet；Conditioner,
The conditioning of hydrolyzate for the abjection of pyrohydrolysis sludge, import are connected with the liquid outlet of the dehydration device；Sludge disappears
Change pond, reacted for anaerobic sludge digestion, import is connected with the outlet of the conditioner, solid outlet and the hot water
Xie Chi is connected, and liquid outlet is connected with the quenched pond；Sewage-treatment plant, import and the sludge digestion tank liquid
Body outlet is connected.
Embodiment 1
Certain municipal sludge, the content of organic matter 42% adjust its moisture content to 90%, it is quenched after sludge carry out pyrohydrolysis, heat
The sludge content of organic matter after hydrolysis is 29%, and the sludge after pyrohydrolysis is dehydrated, and the aqueous solution of abjection enters sludge digestion tank
Anaerobic digestion is carried out, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, gas production 41.26Nml/g, row
Biogas residue out, the content of organic matter of biogas residue are 59%, and for biogas residue after being dehydrated, it is aqueous for conditioning of mud that a part of water enters quenched pond
Rate, a part of water enter sewage-treatment plant, and qualified discharge after processing, dewatered biogas residue enters pyrohydrolysis pond, after quenched
Sludge carry out pyrohydrolysis reaction together.
Embodiment 2
Certain municipal sludge, the content of organic matter 27% adjust its moisture content to 93%, it is quenched after sludge carry out pyrohydrolysis, heat
The sludge content of organic matter after hydrolysis is 15%, and the sludge after pyrohydrolysis is dehydrated, and the aqueous solution of abjection enters sludge digestion tank
Anaerobic digestion is carried out, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, gas production 31.71Nml/g, row
Biogas residue out, the biogas residue content of organic matter are 44%, and after being dehydrated, a part of water enters quenched pond and is used for conditioning of mud moisture content biogas residue,
A part of water enters sewage-treatment plant, qualified discharge after processing, and dewatered biogas residue enters pyrohydrolysis pond, with it is quenched after dirt
Mud carries out pyrohydrolysis reaction together.
Embodiment 3
Certain municipal sludge, the content of organic matter 55% adjust its moisture content to 92%, it is quenched after sludge carry out pyrohydrolysis, heat
The sludge content of organic matter after hydrolysis is 33%, and the sludge after pyrohydrolysis is dehydrated, and the aqueous solution of abjection enters sludge digestion tank
Anaerobic digestion is carried out, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, gas production 52.18Nml/g, row
Biogas residue out, the biogas residue content of organic matter are 62%, and after being dehydrated, a part of water enters quenched pond and is used for conditioning of mud moisture content biogas residue,
A part of water enters sewage-treatment plant, qualified discharge after processing, and dewatered biogas residue enters pyrohydrolysis pond, with it is quenched after dirt
Mud carries out pyrohydrolysis reaction together.
Claims (4)
1. a kind of sludge anaerobic processing method, which is characterized in that include the following steps：
Municipal sludge progress is quenched, adjusts its moisture content to 90% ~ 93%；Sludge after quenched carries out pyrohydrolysis, by sludge solid phase
In organic matter be discharged into liquid phase；Sludge after pyrohydrolysis is dehydrated, the aqueous solution of abjection after conditioning after disappear into sludge
Change pond and carry out anaerobic digestion, dewatered sludge forms mud cake outward transport；Anaerobic digestion generates biogas, and biogas residue is discharged, biogas residue into
Enter to re-start pyrohydrolysis reaction in pyrohydrolysis pond；Biogas slurry a part of anaerobic digestion discharge enters quenched pond and is used for conditioning of mud
Moisture content, a part qualified discharge after sewage treatment.
2. a kind of sludge anaerobic processing method according to claim 1, which is characterized in that the pH of pyrohydrolysis reaction is
7.5 to 11.
3. a kind of sludge anaerobic processing method according to claim 1, which is characterized in that the pH of the sludge digestion reaction
It is 7 to 9.
4. a kind of sludge anaerobic processing system, which is characterized in that including：
Quenched pond is used for conditioning of mud moisture content；Pyrohydrolysis pond is used for sludge hot hydrolysis, import and the quenched pond
Outlet is connected；Dehydration device, is used for pyrohydrolysis sludge dewatering, and import is connected with pyrohydrolysis pond outlet；Conditioner,
The conditioning of hydrolyzate for the abjection of pyrohydrolysis sludge, import are connected with the liquid outlet of the dehydration device；Sludge disappears
Change pond, reacted for anaerobic sludge digestion, import is connected with the outlet of the conditioner, solid outlet and the hot water
Xie Chi is connected, and liquid outlet is connected with the quenched pond；Sewage-treatment plant, import and the sludge digestion tank liquid
Body outlet is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099938.8A CN108862975A (en) | 2018-09-20 | 2018-09-20 | A kind of sludge anaerobic processing method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099938.8A CN108862975A (en) | 2018-09-20 | 2018-09-20 | A kind of sludge anaerobic processing method and system |
Publications (1)
| Publication Number | Publication Date |
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| CN108862975A true CN108862975A (en) | 2018-11-23 |
Family
ID=64324669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811099938.8A Pending CN108862975A (en) | 2018-09-20 | 2018-09-20 | A kind of sludge anaerobic processing method and system |
Country Status (1)
| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109574465A (en) * | 2019-01-20 | 2019-04-05 | 重庆大学 | A method of it is carbonized based on low-temperature hydrothermal and supplements sewage treatment plant's carbon source |
| CN110002712A (en) * | 2019-04-04 | 2019-07-12 | 杨洋 | Sludge energy treatment process |
| CN110451758A (en) * | 2019-08-22 | 2019-11-15 | 天津壹新环保工程有限公司 | River bottom mud resource utilization method and system |
| CN112094005A (en) * | 2020-09-08 | 2020-12-18 | 天津壹新环保工程有限公司 | Alkaline pyrohydrolysis treatment method and system for sludge |
| CN113526806A (en) * | 2020-04-15 | 2021-10-22 | 湖南军信环保股份有限公司 | Sludge treatment method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109574465A (en) * | 2019-01-20 | 2019-04-05 | 重庆大学 | A method of it is carbonized based on low-temperature hydrothermal and supplements sewage treatment plant's carbon source |
| CN110002712A (en) * | 2019-04-04 | 2019-07-12 | 杨洋 | Sludge energy treatment process |
| CN110451758A (en) * | 2019-08-22 | 2019-11-15 | 天津壹新环保工程有限公司 | River bottom mud resource utilization method and system |
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| CN112094005A (en) * | 2020-09-08 | 2020-12-18 | 天津壹新环保工程有限公司 | Alkaline pyrohydrolysis treatment method and system for sludge |
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