CN101759334A - Technique for removing and recycling heavy metal in sludge - Google Patents
Technique for removing and recycling heavy metal in sludge Download PDFInfo
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- CN101759334A CN101759334A CN200810072468A CN200810072468A CN101759334A CN 101759334 A CN101759334 A CN 101759334A CN 200810072468 A CN200810072468 A CN 200810072468A CN 200810072468 A CN200810072468 A CN 200810072468A CN 101759334 A CN101759334 A CN 101759334A
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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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Abstract
The present invention provides a technique for removing and recycling heavy metal in sludge. Sludge is mixed by a mixer, heated and pressurized in the mixing process, processed by special treating liquid added and agitated into gel slurry. The sewage on the upper layer is discharged after the first centrifugation. Sludge on the bottom layer is centrifuged another time, special treating liquid is added, and the centrifugation process is repeated two times. The sludge centrifuged three times is squeezed and sent to an agitator to be mixed. Microorganisms and additives are added to the sludge in the agitator. The agitated sludge is fermented, and the fermented sludge fertilizer is granulated, rolled into balls, cooled and packaged into an organic fertilizer finished product. The technique adopting special treating liquid and treating processes has good effect for removing heavy metal in urban sludge, and the heavy metal can almost be completely removed. The technical processes are scientific and reasonable, and the cost is low. The sludge processed is recycled and used as organic fertilizer, so waste is reasonably utilized, and the cost and the resources are effectively saved. The present invention has obvious economic benefit and environmental protection benefit.
Description
Technical field
The invention belongs to biological technical field, more specifically relate to heavy metal removal and reutilization technology in a kind of mud.
Background technology
Along with the fast development of each province's environment protection cause, the town domestic sewage work of treatment has obtained bigger progress.But, sewage treatment capacity causes the significantly increase of municipal sludge amount when increasing fast, municipal sludge water content height, perishable, the intensive stink is arranged, and contain parasitic ovum, pathogenic micro-organism and heavy metal, as not dealt carefully with, discharging arbitrarily, will cause secondary pollution, but no matter existing municipal sludge processing mode is effectively to utilize or the landfill disposal, all be with minimizing, stabilization, innoxious, resource turns to principle, has problems, has caused bigger environmental pollution to threaten, most municipal sludge landfill disposal take to transport to the mode of the simple and easy landfill of city refuse landfill, because mud do not make stabilization treatment, cause the refuse landfill pollution grows worse, also had a strong impact on municipal wastes sanitary landfill operation and city refuse landfill working life etc.
Goal of the invention
The objective of the invention is to provide heavy metal removal and reutilization technology in a kind of mud; this technology is by particular processing liquid and treatment scheme; make the heavy metal removal effect in the municipal sludge fabulous; almost can remove fully, technical process is scientific and reasonable, and is with low cost; mud after the processing repeats to be used as organic fertilizer; refuse rationally utilizes, and has effectively saved cost and resource, has remarkable economic efficiency and environmental protection benefit.
Heavy metal removal and reutilization technology are in the mud of the present invention: mud is mixed by mixing machine, the pressurization of heating in the mixing process, and the adding dedicated treating liquid is handled, stirring becomes gluey slurry, time centrifugal, the sewage on upper strata is discharged, the 2nd centrifugal and adding dedicated treating liquid of the mud of bottom, repeat 2 times centrifugal process, the mud after will be through 3 times centrifugal squeezes, and sends into mixing and blending machine, mud in stirrer adds microorganism and addition material, mud after stirring is fermented, and the sludge manure after the fermentation is through granulation, pill, cooling is packaged into the fertilizer finished product.
Remarkable advantage of the present invention is: the present invention utilizes the heavy metal in the microbiological treatment technology removal municipal sludge; and be equipped with rational processing technological flow; make the heavy metal removal effect in the municipal sludge fabulous; almost can remove fully; the equipment requirements of using is not high; be fit to large-scale promotion application; technical process is scientific and reasonable; processing cost is cheap; mud after the processing repeats to be used as organic fertilizer, and refuse rationally utilizes, and has effectively saved cost and resource; and the greatly minimizing environmental pollution of degree, have remarkable economic efficiency and environmental protection benefit.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The concrete steps of described technology are:
(1) municipal sludge with 80% water ratio enters ribbon pressurization mixing machine, feed water vapour and improve the mixing machine internal pressurization, making pressure inside is 1.5 normal atmosphere, the outside heat to 180 ℃ make mixing machine inside reach 110 ℃ more than the temperature after, evenly stirred 15 minutes after adding dedicated treating liquid, mud more than 75 ℃ during temperature through stirring become gluey slurry after, by sludge pump mud is moved into the 1st whizzer and begins centrifugal; For the first time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, the mud of bottom enters the 2nd whizzer, adds dedicated treating liquid, begins centrifugal after stirring, for the second time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, and the mud of bottom enters the 3rd whizzer, adds dedicated treating liquid, after the processing, the heavy metal in the mud is removed fully;
(2) mud after centrifugal enters plate and frame squeezing machine or the capable pusher squeezing of screw squeezing machine with 3 times, make sludge dewatering to water ratio 40% back send into mixing and blending machine by conveying belt, interpolation microorganism and addition material in stirrer are uniformly distributed in the mud microorganism;
(3) mud after will stirring enter fermenting house ferment standby, i.e. fertilizer work in-process, fermentation time is 6-10 days, leavening temperature is: 50～60 ℃;
(4) sludge manure after the even fermentation, 25% water ratio enters the granulation of centrifugal granulator pellet processing machine, and the liquid bacterium of spraying enters the shot-blasting machine pill after the granulation in granulation process;
(5) after pill is finished, cooling, packing has been the finished product fertilizer.
Described dedicated treating liquid is the bacterium liquid of thiobacillus ferrooxidant or acid resistance rhodotorula bacterium, and the bacterium consumption is 10～15% of a sludge volume.
The microorganism of the interpolation in the described step (2) is the sludge treatment engineering bacteria, and described engineering bacteria consumption is 1～2% of a sludge volume.
Addition material in the described step (2) is: one or more in flyash, binding agent or the chemical fertilizer auxiliary agent, addition material consumption are 6～10% of sludge volume.
Liquid bacterium in the described step (4) is: be the bacterium of using in the dedicated treating liquid, liquid bacterium consumption is 0.5～1% of a sludge volume.
Through detecting, the result is as shown in following table 1 through the mud after the technical finesse of the present invention:
Below be several specific embodiment of the present invention, further specify the present invention, but the present invention be not limited only to this.
Embodiment 1
The processing concrete steps are as follows:
(1) mud with 80% water ratio enters ribbon pressurization mixing machine, feed water vapour and improve the mixing machine internal pressurization, making pressure inside is 1.2 normal atmosphere, the outside heat to 180 ℃ make mixing machine inside reach 120 ℃ more than the temperature after, evenly stir after adding dedicated treating liquid, mud more than 75 ℃ during temperature through stirring become gluey slurry after, by sludge pump mud is moved into the 1st whizzer and begins centrifugal; For the first time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, the mud of bottom enters the 2nd whizzer, adds dedicated treating liquid, begins centrifugal after stirring, for the second time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, and the mud of bottom enters the 3rd whizzer, adds dedicated treating liquid, after the processing, the heavy metal in the mud is removed fully;
(2) mud after centrifugal enters plate and frame squeezing machine or the capable pusher squeezing of screw squeezing machine with 3 times, make sludge dewatering to water ratio 40% back send into mixing and blending machine by conveying belt, interpolation microorganism and addition material in stirrer are uniformly distributed in the mud microorganism;
(3) mud after will stirring enter fermenting house ferment standby, i.e. fertilizer work in-process, fermentation time is 6 days, leavening temperature is 50 ℃;
(4) sludge manure after the even fermentation, 25% water ratio enters the granulation of centrifugal granulator pellet processing machine, and the liquid bacterium of spraying enters the shot-blasting machine pill after the granulation in granulation process;
(5) after pill is finished, cooling, packing has been the finished product fertilizer.
Described dedicated treating liquid is: the bacterium liquid of thiobacillus ferrooxidant, bacterium consumption are 10% of sludge volume;
The microorganism of the interpolation in the described step (2) is the sludge treatment engineering bacteria, and described engineering bacteria consumption is: account for 1% of sludge volume
Addition material in the described step (2) is: flyash and binding agent, consumption are 6% of sludge volume.
Liquid bacterium in the described step (4) is: thiobacillus ferrooxidant, liquid bacterium consumption is 0.5% of a sludge volume.
Embodiment 2
The processing concrete steps are as follows:
(1) mud with 80% water ratio enters ribbon pressurization mixing machine, feed water vapour and improve the mixing machine internal pressurization, making pressure inside is 1.2 normal atmosphere, the outside heat to 180 ℃ make mixing machine inside reach 120 ℃ more than the temperature after, evenly stir after adding dedicated treating liquid, mud more than 75 ℃ during temperature through stirring become gluey slurry after, by sludge pump mud is moved into the 1st whizzer and begins centrifugal; For the first time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, the mud of bottom enters the 2nd whizzer, adds dedicated treating liquid, begins centrifugal after stirring, for the second time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, and the mud of bottom enters the 3rd whizzer, adds dedicated treating liquid, after the processing, the heavy metal in the mud is removed fully;
(2) mud after centrifugal enters plate and frame squeezing machine or the capable pusher squeezing of screw squeezing machine with 3 times, make sludge dewatering to water ratio 40% back send into mixing and blending machine by conveying belt, interpolation microorganism and addition material in stirrer are uniformly distributed in the mud microorganism;
(3) mud after will stirring enter fermenting house ferment standby, i.e. fertilizer work in-process, fermentation time is 10 days, leavening temperature is 60 ℃;
(4) sludge manure after the even fermentation, 25% water ratio enters the granulation of centrifugal granulator pellet processing machine, and the liquid bacterium of spraying enters the shot-blasting machine pill after the granulation in granulation process;
(5) after pill is finished, cooling, packing has been the finished product fertilizer.
Described dedicated treating liquid is the bacterium liquid of acid resistance rhodotorula bacterium, and the bacterium consumption is 15% of a sludge volume;
The microorganism of the interpolation in the described step (2) is the sludge treatment engineering bacteria, and described engineering bacteria consumption is 2% of a sludge volume
Addition material in the described step (2) is flyash, binding agent and chemical fertilizer auxiliary agent, and consumption is 10% of a sludge volume.
Liquid bacterium in the described step (4) is: liquid bacterium consumption is generally 1% of sludge volume in the routine.
Embodiment 3
The processing concrete steps are as follows:
(1) mud with 80% water ratio enters ribbon pressurization mixing machine, feed water vapour and improve the mixing machine internal pressurization, making pressure inside is 1.2 normal atmosphere, the outside heat to 180 ℃ make mixing machine inside reach 120 ℃ more than the temperature after, evenly stir after adding dedicated treating liquid, mud more than 75 ℃ during temperature through stirring become gluey slurry after, by sludge pump mud is moved into the 1st whizzer and begins centrifugal; For the first time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, the mud of bottom enters the 2nd whizzer, adds dedicated treating liquid, begins centrifugal after stirring, for the second time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, and the mud of bottom enters the 3rd whizzer, adds dedicated treating liquid, after the processing, the heavy metal in the mud is removed fully;
(2) mud after centrifugal enters plate and frame squeezing machine or the capable pusher squeezing of screw squeezing machine with 3 times, make sludge dewatering to water ratio 40% back send into mixing and blending machine by conveying belt, interpolation microorganism and addition material in stirrer are uniformly distributed in the mud microorganism;
(3) mud after will stirring enter fermenting house ferment standby, i.e. fertilizer work in-process, fermentation time is 8 days, leavening temperature is 55 ℃;
(4) sludge manure after the even fermentation, 25% water ratio enters the granulation of centrifugal granulator pellet processing machine, and the liquid bacterium of spraying enters the shot-blasting machine pill after the granulation in granulation process;
(5) after pill is finished, cooling, packing has been the finished product fertilizer.
Described dedicated treating liquid is: the bacterium liquid of thiobacillus ferrooxidant, bacterium consumption are 12% of sludge volume;
The microorganism of the interpolation in the described step (2) is the sludge treatment engineering bacteria, and described engineering bacteria consumption is: 1.5% of sludge volume;
Addition material in the described step (2) is a flyash, and consumption is 8% of a sludge volume.
Liquid bacterium in the described step (4) is: liquid bacterium consumption is generally 0.8% of sludge volume in the routine.
Claims (6)
1. heavy metal is removed and reutilization technology in the mud, it is characterized in that: mud is mixed by mixing machine, the pressurization of heating in the mixing process, and the adding dedicated treating liquid is handled, stirring becomes gluey slurry, time centrifugal, the sewage on upper strata is discharged, and the 2nd centrifugal and adding dedicated treating liquid of the mud of bottom repeats 2 times centrifugal process, mud after will be through 3 times centrifugal squeezes, send into mixing and blending machine, the mud in stirrer adds microorganism and addition material, and the mud after stirring is fermented, sludge manure after the fermentation is through granulation, pill, cooling is packaged into the fertilizer finished product.
2. heavy metal is removed and reutilization technology in the mud according to claim 1, and it is characterized in that: the concrete steps of described technology are:
(1) municipal sludge with 80% water ratio enters ribbon pressurization mixing machine, feed water vapour and improve the mixing machine internal pressurization, making pressure inside is 1.5 normal atmosphere, the outside heat to 180 ℃ make mixing machine inside reach 110 ℃ more than the temperature after, evenly stirred 15 minutes after adding dedicated treating liquid, mud more than 75 ℃ during temperature through stirring become gluey slurry after, by sludge pump mud is moved into the 1st whizzer and begins centrifugal; For the first time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, the mud of bottom enters the 2nd whizzer, adds dedicated treating liquid, begins centrifugal after stirring, for the second time after centrifugal the finishing, the sewage on upper strata is entered in the heavy metal treating pond, and the mud of bottom enters the 3rd whizzer, adds dedicated treating liquid, after the processing, the heavy metal in the mud is removed fully;
(2) mud after centrifugal enters plate and frame squeezing machine or the capable pusher squeezing of screw squeezing machine with 3 times, make sludge dewatering to water ratio 40% back send into mixing and blending machine by conveying belt, interpolation microorganism and addition material in stirrer are uniformly distributed in the mud microorganism;
(3) mud after will stirring enter fermenting house ferment standby, i.e. fertilizer work in-process, fermentation time is 6-10 days, leavening temperature is: 50～60 ℃;
(4) sludge manure after the even fermentation, 25% water ratio enters the granulation of centrifugal granulator pellet processing machine, and the liquid bacterium of spraying enters the shot-blasting machine pill after the granulation in granulation process;
(5) after pill is finished, cooling, packing has been the finished product fertilizer.
3. heavy metal is removed and reutilization technology in the mud according to claim 1, and it is characterized in that: described dedicated treating liquid is the bacterium liquid of thiobacillus ferrooxidant or acid resistance rhodotorula bacterium, and the bacterium consumption is 10～15% of a sludge volume.
4. heavy metal is removed and reutilization technology in the mud according to claim 1, and it is characterized in that: the microorganism of the interpolation in the described step (2) is the sludge treatment engineering bacteria, and described engineering bacteria consumption is 1～2% of a sludge volume.
5. heavy metal is removed and reutilization technology in the mud according to claim 1, and it is characterized in that: the addition material in the described step (2) is: one or more in flyash, binding agent or the chemical fertilizer auxiliary agent, addition material consumption are 6～10% of sludge volume.
6. heavy metal is removed and reutilization technology in the mud according to claim 1, and it is characterized in that: the liquid bacterium in the described step (4) is: be the bacterium of using in the dedicated treating liquid, liquid bacterium consumption is 0.5～1% of a sludge volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810072468A CN101759334A (en) | 2008-12-25 | 2008-12-25 | Technique for removing and recycling heavy metal in sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810072468A CN101759334A (en) | 2008-12-25 | 2008-12-25 | Technique for removing and recycling heavy metal in sludge |
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| CN101759334A true CN101759334A (en) | 2010-06-30 |
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| CN200810072468A Pending CN101759334A (en) | 2008-12-25 | 2008-12-25 | Technique for removing and recycling heavy metal in sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153258A (en) * | 2010-12-02 | 2011-08-17 | 福建省农业科学院农业工程技术研究所 | Production technique for reducing content of heavy metals in municipal domestic sludge |
| CN105932239A (en) * | 2016-05-11 | 2016-09-07 | 武汉安能电源有限责任公司 | Positive electrode material of lithium thionyl chloride battery and preparation method thereof |
| CN108855505A (en) * | 2018-06-25 | 2018-11-23 | 钟桂冰 | Sludge decontamination processing system |
| CN109081533A (en) * | 2017-06-14 | 2018-12-25 | 刘汉东 | Sludge of sewage treatment plant method of comprehensive utilization and device |
-
2008
- 2008-12-25 CN CN200810072468A patent/CN101759334A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153258A (en) * | 2010-12-02 | 2011-08-17 | 福建省农业科学院农业工程技术研究所 | Production technique for reducing content of heavy metals in municipal domestic sludge |
| CN105932239A (en) * | 2016-05-11 | 2016-09-07 | 武汉安能电源有限责任公司 | Positive electrode material of lithium thionyl chloride battery and preparation method thereof |
| CN109081533A (en) * | 2017-06-14 | 2018-12-25 | 刘汉东 | Sludge of sewage treatment plant method of comprehensive utilization and device |
| CN108855505A (en) * | 2018-06-25 | 2018-11-23 | 钟桂冰 | Sludge decontamination processing system |
| CN108855505B (en) * | 2018-06-25 | 2020-06-16 | 工大环境股份有限公司 | Sludge impurity removal treatment system |
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