CN102092914B - Sludge treatment device and method - Google Patents
Sludge treatment device and method Download PDFInfo
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- CN102092914B CN102092914B CN201010571687A CN201010571687A CN102092914B CN 102092914 B CN102092914 B CN 102092914B CN 201010571687 A CN201010571687 A CN 201010571687A CN 201010571687 A CN201010571687 A CN 201010571687A CN 102092914 B CN102092914 B CN 102092914B
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- sludge
- tower
- ozone
- mud
- wet oxidation
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge treatment device and method. The sludge treatment device comprises a gravity concentrated sludge pond, a sludge-water separator, a lift pump, a wet-type oxidization tower, an air compressor, an ozone generator, a Venturi device, an ozone reaction tower and an activated sludge pond. The sludge treatment method comprises the steps of: conveying sludge into the sludge-water separator and then into the wet-type oxidation tower, stirring the sludge, introducing preheated air, and remaining for 1-2h; remaining for 60-80min when the wet-type oxidation tower has the temperature of 150-350 DEG C and the pressure of 1-8Mpa; and conveying the treated sludge into the ozone oxidation tower, introducing ozone with the amount of 0.10kg O3/kgmlss and reacting for 10-15min. The sludge treated with the method is rich in N, P and K and can be prepared into fertilizers by delivering the sludge to a fertilizer plant and adding a humic acid stock solution so that the quality of fruits and vegetable crops can be obviously improved and the production of melon and fruit can be increased; the treatment cost can be greatly reduced, and the obtained sludge has the moisture content lower than 10% and the total solid content reduced by 50%; and pathogenic bacteria can be inactivated, and the sludge treatment device and method can be better applied to the harmless, decrementing and recycling treatment of the urban sludge.
Description
Technical field
The invention belongs to sludge treatment technology in the environmental protection field; Be applicable to various bioprocess technologies produce in the municipal sewage plant the residual active sludge and the digestion process of mixing sludge, particularly be applicable to produce in the complex wastewater treating processess such as chemical engineering sewage, stench sewage can biochemistry and the digestion process of the organic sludge of bio-refractory.
Background technology
At present, activated sludge process is because advantage such as cost is low, power consumption is few remains the sewage water treatment method that generally uses.Because in this method process of treating waste water; The mud bed material that is generated comprises organism such as carbon, nitrogen, phosphorus, sulphur, and these organism can form excessive organism thus as a new bacterial cells synthetic part; Need constantly to remove, to keep stable state mud balance.The landfill burning sludge possibly cause secondary pollution for soil and air, and the cost energy consumption is bigger.
The main drawback of existing sludge treatment technique has: 1, the anaerobic digestion techniques processing cost is high, fails to reclaim available resources; 2, the volatile solid content in the primary sludge is lower, and inorganic content is high, and organic content is little, therefore burns the cost height.
The a large amount of mud of activated sludge process by-product, its amount is about 0.5～1.5% of sewage quantity, but the processing costs of mud but accounts for 40～60% of sewage work's overall running cost.
The sludge treatment means of traditional cities Sewage Plant mainly be through concentrating, landfill after the anaerobic digestion.The mud organic substance rate of decomposition has only 25～45%, and effect is undesirable.Solid phase is handled generally to be needed to use polymkeric substance, and sludge dewatering can reach 15～25% solids content, accounts for 20～60% of total operation expense.With whizzer or other equipment for separating liquid from solid report arranged also.Also comprise mechanical stirrer and the ozonize pattern of dynamic mixing pump for mud.
Ozone can generate hydroxy radical qiao, and oxidisability is strong, can destroy biological cell wall, oxidation intracellular matter, comprises that protein, fat, carbohydrate etc. are the small molecules inorganics.
The ozone reaction system mainly comprises continuous stirred tank reactor(CSTR), plug flow reactor and batch reactor.The residence time is difference slightly.Big, the easy back-mixing of plug flow reactor treatment capacity, batch reactor is fit to small scale wastewater treatment.This shows that development novel energy-conserving sludge treatment technology is extremely urgent.
Summary of the invention
The technical problem that the present invention will solve provides a kind of employing wet oxidation, under the warming and pressurizing condition, utilizes airborne dioxygen oxidation macromolecule organic to be CO
2/ N
2Or oxynitrides, can make protein, fats portion in the mud resolve into small molecules, to improve the sludge treatment equipment and the treatment process of mud biodegradability.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of sludge treatment equipment; Comprise that several are used to store the gravity thickened sludge pond of mud, is characterized in that: also comprise separator for mud and water, lift pump, wet oxidation tower, air compressor machine, ozone oxidation system and activated sludge tank, gravity thickened sludge pond is communicated with separator for mud and water; Lift pump is located between separator for mud and water and the wet oxidation tower, and the wet oxidation tower is connected with air compressor machine; The ozone oxidation system is made up of ozonizer, Venturi and ozone reaction tower, and the wet oxidation tower docks with the ozone reaction tower, and ozonizer is connected with several Venturis, and Venturi connects the ozone reaction tower; The ozone reaction tower connects activated sludge tank.
Further, also be provided with the passage that returns Venturi from the ozone reaction tower between ozone reaction tower and the Venturi, the remaining ozone of reaction can get into the ozone reaction tower once more and react.
Further, the outlet of ozone reaction tower is provided with the passage that returns the wet oxidation tower, and the mud after peroxo-can get into the wet oxidation tower once more and do cyclic oxidation.
Further, the wet oxidation tower is provided with the passage that returns lift pump.
Said method for sludge treatment is included in gravity thickened sludge pond and carries out gravity and concentrate, and it is characterized in that: the mud after gravity concentrates gets into separator for mud and water, and supernatant gets into Sewage treatment systems; Mud is then sent in the wet oxidation tower through lift pump, and the stirrer in the wet oxidation tower stirs mud, and the while air compressor machine is sent into the air after the preheating, 1～2 hour residence time; Through electrical heating method heating, it is that 150～350 ℃, pressure are the condition of 1～8 Mpa, and kept intermittent reaction 60～80 minutes that the wet oxidation tower reaches temperature; Send into the ozone reaction tower after the completion, the ozone gas that ozonizer produces injects the ozone reaction tower through Venturi, and the ozone dosage is 0.10 kgO
3/ kg mlss (mass ratio), in 10～15 minutes reaction times, reaction back residual ozone gas returns the ozone reaction tower through Venturi once more; Mud is disposed to activated sludge tank or returns wet oxidation tower cyclic oxidation once more behind the ozone deep oxidation, deliver to fertilizer plant after the drying and make composite fertilizer.
Further, the preheated air temperature that charges into before the oxidation is 135～165 ℃.
The mud that method of the present invention was handled is rich in nitrogen phosphorus potassium, can deliver to fertilizer plant's adding humic acids stoste and process fertilizer, through using proof, can significantly improve the quality of fruit, vegetable crop, makes the melon and fruit increasing both production and income, improves soil quality; Can reduce the heat treated expense of mud significantly, obtain dewatering the mud water ratio below 10%, total solids reduces 50%; Pathogenic bacteria is inactivated, and has more by force in, minimizing innoxious at city sludge, the recycling treatment and uses.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
In the present embodiment, with reference to Fig. 1, treatment system is made up of wet oxidation system and ozone oxidation system, and two in gravity thickened sludge pond, general caliber DN30 (PE material), returned sluge pump horsepower are that 1.5kw, wet oxidation tower useful volume are 4.5 m3.
Mud after gravity concentrates gets into separator for mud and water, and supernatant gets into Sewage treatment systems; Mud is then sent in the wet oxidation tower through lift pump; Stirrer in the wet oxidation tower stirs mud; The while air compressor machine is sent into the air after the preheating, and preheated air temperature is 150 ℃ (can be 135～165 ℃), 1 hour residence time (can stop 1～2 hour); Through the electrical heating method heating, it is that 200 ℃ of (can be between 150～350 ℃), pressure be 4 Mpa (can be 1～8 Mpa) that the wet oxidation tower reaches temperature, and keeps 60 minutes (can be 60～80 minutes), intermittent reaction; Send into the ozone reaction tower after the completion, the ozone gas that ozonizer produces injects the ozone reaction tower through Venturi, and the ozone dosage is 0.10 kgO
3/ kg mlss (mass ratio), in the 10 minutes reaction times (can be 10～15 minutes), reaction back residual ozone gas returns the ozone reaction tower through Venturi once more; Mud is disposed to activated sludge tank (perhaps returning wet oxidation tower cyclic oxidation once more) behind the ozone deep oxidation, deliver to fertilizer plant after the drying and make composite fertilizer.
Sludge concentration after the wet oxidation tower is handled is 1500～2000mg/L.Aeration tube adopts DN10, and airborne oxygen is introduced the wet oxidation tower.
The ozone reaction tower uses caliber DN5 (PE material), and useful volume is 3 m3, and the ozone flow is 0.5 g/h, and the residence time is 1.5 hours, and handling the back sludge concentration is 1000～1500 mg/L.
During 3 months of system trial run, the mud of pilot scale is detected.System is respectively 89%, 85%, 75% for the average removal rate of COD, total nitrogen, total phosphorus; Sludge yield is 0.2kgmlss/kgCOD, is 80% of sewage work's system sludge output, has reached the purpose of mud decrement.
Below the present invention is done a detailed description, the above is merely the present invention's preferred embodiment, when can not limiting practical range of the present invention, promptly allly does impartially to change and modify according to the application's scope, all should still belong in the covering scope of the present invention.
Claims (6)
1. a sludge treatment equipment comprises that several are used to store the gravity thickened sludge pond of mud, wet oxidation tower, ozone oxidation system; It is characterized in that: also comprise separator for mud and water, lift pump, air compressor machine, reach activated sludge tank, gravity thickened sludge pond is communicated with separator for mud and water, and lift pump is located between separator for mud and water and the wet oxidation tower, and the wet oxidation tower is connected with air compressor machine; The ozone oxidation system is made up of ozonizer, Venturi and ozone reaction tower, and the wet oxidation tower docks with the ozone reaction tower, and ozonizer is connected with several Venturis, and Venturi connects the ozone reaction tower; The ozone reaction tower connects activated sludge tank.
2. sludge treatment equipment according to claim 1 is characterized in that: also be provided with the passage that returns Venturi from the ozone reaction tower between ozone reaction tower and the Venturi.
3. sludge treatment equipment according to claim 1 is characterized in that: the outlet of ozone reaction tower is provided with the passage that returns the wet oxidation tower.
4. sludge treatment equipment according to claim 1 is characterized in that: the wet oxidation tower is provided with the passage that returns lift pump.
5. method for sludge treatment is included in gravity thickened sludge pond and carries out gravity and concentrate, and it is characterized in that: the mud after gravity concentrates gets into separator for mud and water, and supernatant gets into Sewage treatment systems; Mud is then sent in the wet oxidation tower through lift pump, and the stirrer in the wet oxidation tower stirs mud, and the while air compressor machine is sent into the air after the preheating, 1～2 hour residence time; Through electrical heating method heating, it is that 150～350 ℃, pressure are the condition of 1～8 MPa, and kept 60～80 minutes that the wet oxidation tower reaches temperature; Send into the ozone reaction tower after the completion, the ozone gas that ozonizer produces injects the ozone reaction tower through Venturi, and the ozone dosage is 0.10 kgO
3/ kgMLSS (mass ratio), in 10～15 minutes reaction times, reaction back residual ozone gas returns the ozone reaction tower through Venturi once more; Mud is disposed to activated sludge tank or returns wet oxidation tower cyclic oxidation once more behind the ozone deep oxidation, deliver to fertilizer plant after the drying and make composite fertilizer.
6. method for sludge treatment according to claim 5 is characterized in that: the preheated air temperature that charges into before the oxidation is 135～165 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571687A CN102092914B (en) | 2010-12-03 | 2010-12-03 | Sludge treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571687A CN102092914B (en) | 2010-12-03 | 2010-12-03 | Sludge treatment device and method |
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| Publication Number | Publication Date |
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| CN102092914A CN102092914A (en) | 2011-06-15 |
| CN102092914B true CN102092914B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010571687A Expired - Fee Related CN102092914B (en) | 2010-12-03 | 2010-12-03 | Sludge treatment device and method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013000107A1 (en) * | 2011-06-25 | 2013-01-03 | 湖南湘牛污泥深度处理有限公司 | Method of treating sludge under normal state |
| CN102718382B (en) * | 2012-06-27 | 2014-01-15 | 常州浩瀚新材料科技有限公司 | Sludge processing technology by electrochemical direct oxidation |
| CN106630245B (en) * | 2015-10-29 | 2020-03-06 | 宝山钢铁股份有限公司 | Method and device for efficiently degrading COD in cold-rolled concentrated oil inorganic super-filtered water |
| CN105859057A (en) * | 2016-06-15 | 2016-08-17 | 青岛理工大学 | Method and system for extracting substances and energy from sewage |
| CN110498696A (en) * | 2019-08-26 | 2019-11-26 | 黑龙江世纪云天化农业科技有限公司 | A kind of ecology organic fertilizer and preparation method thereof |
| CN111282962B (en) * | 2020-03-02 | 2021-04-23 | 清华大学深圳国际研究生院 | Method for co-processing organic solid waste and kitchen waste |
| CN112299598A (en) * | 2020-10-13 | 2021-02-02 | 安徽国星生物化学有限公司 | Treatment method of heterocyclic wastewater containing tar bipyridine |
| CN113402138A (en) * | 2021-07-14 | 2021-09-17 | 上海发电设备成套设计研究院有限责任公司 | Harmless treatment equipment and method for medical sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405103A (en) * | 2001-09-20 | 2003-03-26 | 中国石化集团齐鲁石油化工公司 | Sludge treatment method |
| CN101708937A (en) * | 2009-11-27 | 2010-05-19 | 南京工业大学 | Method for promoting sludge reduction by ozone |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405103A (en) * | 2001-09-20 | 2003-03-26 | 中国石化集团齐鲁石油化工公司 | Sludge treatment method |
| CN101708937A (en) * | 2009-11-27 | 2010-05-19 | 南京工业大学 | Method for promoting sludge reduction by ozone |
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| CN102092914A (en) | 2011-06-15 |
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