CN112707616A - Method for performing stable reduction recycling treatment on sludge of municipal sewage plant - Google Patents
Method for performing stable reduction recycling treatment on sludge of municipal sewage plant Download PDFInfo
- Publication number
- CN112707616A CN112707616A CN201910996503.1A CN201910996503A CN112707616A CN 112707616 A CN112707616 A CN 112707616A CN 201910996503 A CN201910996503 A CN 201910996503A CN 112707616 A CN112707616 A CN 112707616A
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- Prior art keywords
- sludge
- pyrolysis
- treatment
- sewage plant
- municipal sewage
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Classifications
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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
-
- 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
- C02F11/10—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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- 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
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Materials Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for performing stable reduction and resource treatment on sludge of an urban sewage plant, which effectively solves the problems of low decomposition degree of sludge organic matters and low unit yield of generated pyrolytic carbon and organic pyrolytic gas in the traditional sludge treatment process.
Description
Technical Field
The invention relates to the field of sludge treatment and recycling, in particular to a method for performing stable decrement recycling treatment on sludge of an urban sewage plant.
Background
With the continuous improvement of the industrial level and the living standard of people, the sewage treatment amount is gradually increased, so that the sludge amount of a sewage plant is also obviously increased. Sludge contains a large amount of microorganisms and harmful components, and if the sludge cannot be effectively treated and disposed, water, atmosphere and soil environment are easily polluted. Thus, there is a need for effective treatment and disposal of sewage plant sludge using appropriate techniques. The domestic waste incineration plant is used for carrying out cooperative treatment on the sludge of the sewage plant and the domestic waste, so that the problems of low sludge heat value, high investment and operation cost and the like can be effectively solved, the reduction, harmlessness and resource utilization of the sludge are realized, and the domestic waste incineration plant has important application value and prospect. Domestic sludge treatment is concerned more and more, and the final purpose of sludge treatment in municipal sewage is to change reduction, recycling and harmlessness into principles. The treatment method mainly comprises an incineration method, a pyrolysis method, a landfill method, a chemical separation method, a biological method and the like. The common methods such as landfill, medium-low temperature pyrolysis and the like have higher requirements on sludge components, and the treated sludge has higher pollutant concentration and is easy to generate secondary pollution to the environment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for performing stable reduction resource treatment on sludge of an urban sewage plant. The method utilizes the sludge of the urban sewage plant to recover and prepare the pyrolytic carbon by a high-temperature pyrolysis method, not only can improve the treatment effect of the sludge, but also can solve the problem of recycling of wastes.
In order to achieve the purpose, the following technical scheme is adopted:
a method for performing stable decrement recycling treatment on sludge of an urban sewage plant comprises the following specific steps:
settling sludge collected from urban sewage plants in a sludge tank, and removing separated water;
adding a flocculating agent into the precipitated sludge for dehydration to obtain dehydrated sludge with the solid content of 10-15%;
placing the dewatered sludge into a digestion tank, and performing anaerobic digestion treatment to obtain generated organic gas;
air-drying the sludge semi-finished product subjected to anaerobic digestion treatment to obtain a sludge condensate, and performing high-temperature pyrolysis to generate pyrolytic carbon;
after stirring, carrying out secondary pyrolysis on the pyrolytic carbon and the pyrolytic residue;
after the secondary pyrolysis, the sludge residue with reduced amount and stability, the pyrolytic carbon with higher purity and the organic pyrolysis gas are prepared.
The invention has the beneficial effects that:
the invention carries out anaerobic digestion and secondary pyrolysis on 10 to 15 percent of dewatered sludge, and can realize stabilization, reduction and recycling treatment on sludge of municipal sewage plants; harmful gas emission caused by volatilization and secondary decomposition of organic matters in the sludge is effectively reduced, and urban air pollution is reduced; harmful substances in the sludge are reduced, and enter the soil along with the permeation of the sludge moisture, so that secondary pollution is generated to the soil; compared with the traditional sludge treatment method, the method has the advantages of high decomposition degree of organic matters in the sludge, high unit yield of generated pyrolytic carbon and organic pyrolytic gas and high comprehensive treatment efficiency of the sludge.
Detailed Description
Settling sludge collected from a municipal sewage plant in a sludge tank, and removing separated water, wherein the settling standard of the sludge in the sludge tank is between 0.5 and 1 meter, and the settling time is between 12 and 24 hours;
adding a flocculating agent into the precipitated sludge for dehydration to obtain dehydrated sludge with the solid content of 10-15%, wherein the flocculating agent is polyaluminium sulfate, and the ratio of the flocculating agent to the sludge is 1.5: 10;
placing the dewatered sludge into a digestion tank, performing anaerobic digestion treatment to obtain generated organic gas at the same time, wherein the standard of the digestion tank is 3000-4000 cubic meters, the anaerobic digestion environment is anaerobic, the temperature control range is 50-55 ℃, and the treatment time is 35-40 days;
carrying out air drying treatment on the sludge semi-finished product subjected to anaerobic digestion treatment to obtain a sludge condensate, carrying out high-temperature pyrolysis to generate pyrolytic carbon, wherein the air drying treatment mode is stirring and ventilation treatment, the air drying temperature control range is 110-120 ℃, the pyrolysis temperature control range is 600 ℃, and the pyrolysis time is 1-1.5 hours;
after stirring, carrying out secondary pyrolysis on the pyrolytic carbon and the pyrolytic residue;
after the secondary pyrolysis, the sludge residue with reduced amount and stability, the pyrolytic carbon with higher purity and the organic pyrolysis gas are prepared.
Claims (5)
1. A method for performing stable decrement resource treatment on sludge of an urban sewage plant is characterized by comprising the following specific steps:
settling sludge collected from urban sewage plants in a sludge tank, and removing separated water;
adding a flocculating agent into the precipitated sludge for dehydration to obtain dehydrated sludge with the solid content of 10-15%;
placing the dewatered sludge into a digestion tank, and performing anaerobic digestion treatment to obtain generated organic gas;
air-drying the sludge semi-finished product subjected to anaerobic digestion treatment to obtain a sludge condensate, and performing high-temperature pyrolysis to generate pyrolytic carbon;
after stirring, carrying out secondary pyrolysis on the pyrolytic carbon and the pyrolytic residue;
after the secondary pyrolysis, the sludge residue with reduced amount and stability, the pyrolytic carbon with higher purity and the organic pyrolysis gas are prepared.
2. The method for the stable decrement recycling of sludge in municipal sewage plant according to claim 1, wherein the settling standard of the sludge in the sludge pond is between 0.5 m and 1 m, and the settling time is between 12 h and 24 h.
3. The method for performing stable decrement resource treatment on the sludge of the municipal sewage plant according to claim 1, wherein the component of the flocculant is polyaluminium sulfate, and the ratio of the flocculant to the sludge is 1.5: 10; the standard of the digestion tank is 3000-4000 cubic meters, the anaerobic digestion environment is anaerobic, the temperature control range is 50-55 ℃, and the treatment time is 35-40 days.
4. The method for performing stable reduction and resource utilization on the sludge of the municipal sewage plant according to claim 1, wherein the air-drying treatment is stirring while ventilating, the air-drying temperature is controlled within a range of 110 ℃ to 120 ℃, the pyrolysis temperature is controlled within a range of 600 ℃, and the pyrolysis time is 1 hour to 1.5 hours.
5. The method for performing stable reduction and resource utilization on the sludge of the municipal sewage plant according to claim 1, wherein the pyrolysis carbon and the pyrolysis residue are subjected to secondary pyrolysis after being stirred.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996503.1A CN112707616A (en) | 2019-10-25 | 2019-10-25 | Method for performing stable reduction recycling treatment on sludge of municipal sewage plant |
| GBGB1918357.3A GB201918357D0 (en) | 2019-10-25 | 2019-12-13 | A method for the steady reduction of sludge in municipal sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996503.1A CN112707616A (en) | 2019-10-25 | 2019-10-25 | Method for performing stable reduction recycling treatment on sludge of municipal sewage plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112707616A true CN112707616A (en) | 2021-04-27 |
Family
ID=69186823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910996503.1A Pending CN112707616A (en) | 2019-10-25 | 2019-10-25 | Method for performing stable reduction recycling treatment on sludge of municipal sewage plant |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112707616A (en) |
| GB (1) | GB201918357D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583774A (en) * | 2022-08-30 | 2023-01-10 | 湖南平安环保股份有限公司 | Regulation and control method for preparing carbon by sludge pyrolysis |
-
2019
- 2019-10-25 CN CN201910996503.1A patent/CN112707616A/en active Pending
- 2019-12-13 GB GBGB1918357.3A patent/GB201918357D0/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583774A (en) * | 2022-08-30 | 2023-01-10 | 湖南平安环保股份有限公司 | Regulation and control method for preparing carbon by sludge pyrolysis |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201918357D0 (en) | 2020-01-29 |
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