CN107352761A - A kind of medical sludge harmless treatment method and its system - Google Patents
A kind of medical sludge harmless treatment method and its system Download PDFInfo
- Publication number
- CN107352761A CN107352761A CN201710529084.1A CN201710529084A CN107352761A CN 107352761 A CN107352761 A CN 107352761A CN 201710529084 A CN201710529084 A CN 201710529084A CN 107352761 A CN107352761 A CN 107352761A
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- Prior art keywords
- sludge
- cake
- sterilization
- filter
- medical
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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
- C02F11/004—Sludge detoxification
-
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
Abstract
The invention provides a kind of medical sludge harmless treatment method and its system, method to specifically include：S1, sterilization：Lime is added in sludge to adjust pH value to more than 11.5；It is S2, quenched：Including：S21, addition accounts for the coagulant that sludge total weight percent scope is 1% ~ 10% in the sludge by sterilization；S22, addition account for the flocculant of sludge total weight percent 0.1% ~ 0.5%；S3, filter-press dehydration：Thickened sludge after modifier treatment is filtered, control filtering equipment air pressure obtains the sludge cake of filtrate and moisture content below 70% between 0.8MPa 2.2MPa, and filtrate backflow re-starts quenched；S4, low temperature drying：Sludge cake after filter-press dehydration is dried under the conditions of 90 DEG C ~ 120 DEG C, obtains sludge cake of the moisture content below 55%.Present invention also offers a kind of medical sewage sludge harmlessness processing system.Above method and system, Treatment of Sludge is obtained to the sludge cake for meeting control standard, processing procedure is simple, and cost is low, high treating effect, is advantageous to large-scale promotion utilization.
Description
Technical field
The present invention relates to wastewater sludge processing technology field, more particularly to a kind of medical sludge harmless treatment method and its
System.
Background technology
Medical waste water sludge source and composition are sufficiently complex, contain a large amount of pathogenic microbes, poisonous, harmful physico
Pollutant is learned, there is space-pollution, acute infection, latent infection etc. to infect feature, if infectiousness caused by patient is dirty
Sewage caused by water and treatment is directly discharged into progress conventional sewage processing in city planting ductwork, has the pollutant of infectiousness germ
(pollutant for carrying bacterium, virus, fungi) can not obtain effective sterilizing, turn into the source of transmission, so medical
Sludge need to reach after being handled after control standard could safety dumping to city planting ductwork.
1st, sterilization technology index.Without spreading venereal diseases opportunistic pathogen；Excrement colibacillus group number≤100 (mpn/g) of sludge, ascarid after processing
Worm's ovum death rate ＞ 95%, reaches《Discharge standard of water pollutants for medical organization》GB18466-2005 tables 4 control standard.
2nd, sludge goes to remove water technical indicator.Mechanical dehydration processing is carried out to sludge using this technique, sludge is aqueous after processing
Rate is below 65%.
At present, have also specifically for medical field sewage effectively purify in the prior art and reach safety dumping mark
Accurate sewage water treatment method.Therefore, processing how is carried out to medical field sewage so that medical sludge reaches safety dumping standard,
As those skilled in the art's urgent problem to be solved.
The content of the invention
To solve problem above, the invention provides by medical waste water and Treatment of Sludge to reach safety dumping standard
A kind of medical sludge harmless treatment method and its system.
The invention discloses a kind of medical sludge harmless treatment method, methods described includes：S1, sterilization：In sludge
Lime is added, the pH value of sludge will be adjusted to more than 11.5；It is S2, quenched：S21, addition accounts for dirt in the sludge by sterilization
Mud total weight percent scope is 1% ~ 10% coagulant；S22, added again in the sludge after adding coagulant and account for sludge gross weight
The flocculant of percentage 0.1% ~ 0.5% is measured, obtains thickened sludge；S3, filter-press dehydration：It is dirty to the concentration after modifier treatment
Mud is filtered by filtering equipment, and control filtering equipment air pressure obtains filtrate and moisture content between 0.8MPa-2.2MPa
The sludge cake below 70%, filtrate backflow re-start quenched；S4, low temperature drying：By the sludge cake after filter-press dehydration 90 DEG C ~
Dried under the conditions of 120 DEG C, obtain sludge cake of the moisture content below 55%.
Preferably, also include step S5 after step s4, the sludge cake of low temperature drying is subjected to landfill disposal.
The invention also discloses one kind application, a kind of medical sludge harmless treatment method carries out innoxious place as described above
Reason system, it is characterised in that described device includes：
Sterilization pool, the sterilization pool are used to contain sludge, and addition lime carries out disinfection；
Comprehensive treatment tank, the comprehensive treatment tank are used to turn to contain the sludge after sterilization, add coagulant and flocculant process
Obtain thickened sludge；
Thickened sludge progress filter-press dehydration is obtained moisture content below 70% by plate and frame type filter-press, the plate and frame type filter-press
Sludge cake；
Sludge cake of the moisture content below 70% is carried out heating, drying to aqueous by rotating drum type drying machine, the rotating drum type drying machine
Sludge cake of the rate below 55%.
A kind of medical sludge harmless treatment method provided by the invention and its system,
After sludge is handled, obtain moisture content and be down to less than 55% sludge cake, and eliminated " infectiousness " it is dangerous because
Element, reach《Discharge standard of water pollutants for medical organization》GB18466-2005 controls standard, can be sent to sludge treatment Enterprise Integrated
Using solid waste disposal unit carry out final disposal, methods described is simple to operate, and cost is low, high treating effect, is advantageous to
Large-scale promotion application.
Brief description of the drawings
Below in conjunction with the accompanying drawings, by the way that the embodiment of the present invention is described in detail, technical scheme will be made
And other beneficial effects are apparent.
Fig. 1 is a kind of medical sludge harmless treatment method and its system structure diagram.
Embodiment
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with being preferable to carry out for the present invention
Example and its accompanying drawing are described in detail.
The invention discloses a kind of medical sludge harmless treatment method, methods described includes：
S1, sterilization：
Lime is added in sludge, the pH value of sludge will be adjusted to more than 11.5, to change bacteria live environment, utilizes carbonic acid
Calcium and water reaction generation calcium hydroxide, it is in strong basicity to make water quality, and the protein and nucleic acid of pathogen are destroyed using alkaline environment, is disturbed
Disorderly its eubolism, lead pathogenic microorganisms and bacterium is difficult to survive and it is dead, so as to reach the purpose of sludge disinfection；
It is S2, quenched：
S21, addition accounts for the coagulant that sludge total weight percent scope is 1% ~ 10%, coagulant pair in the sludge by sterilization
Sludge colloidal particle plays electrostatic neutralization and net is caught volume and swept；
S22, add the flocculant for accounting for sludge total weight percent 0.1% ~ 0.5% again in the sludge after adding coagulant, accelerate
Sludge colloidal particle flocculation process, the density of sludge colloidal particle coagulated particles is increased, strengthen adsorption bridging effect, give full play to
The net effect of catching, sludge colloidal particle resistivity is reduced, reduce the water content of sludge colloidal particle, obtain thickened sludge；
S3, filter-press dehydration：
Thickened sludge after modifier treatment is filtered by filtering equipment, control filtering equipment air pressure is in 0.8MPa-
Between 2.2MPa, the sludge cake of filtrate and moisture content below 70% is obtained, filtrate backflow re-starts quenched；
S4, low temperature drying：
Sludge cake after filter-press dehydration is dried under the conditions of 90 DEG C ~ 120 DEG C, moisture in sludge cake is further evaporated,
Obtain sludge cake of the moisture content below 55%.
Preferably, also include step S5 after step s4, the sludge cake of low temperature drying is subjected to landfill disposal.
After the medical sludge of this method processing, obtain moisture content and be down to less than 55% sludge cake, and eliminated " infectiousness "
Hazards, reach《Discharge standard of water pollutants for medical organization》GB18466-2005 controls standard, can be sent to sludge treatment
Enterprise Integrated using solid waste disposal unit carry out final disposal, methods described is simple to operate, and cost is low, treatment effect
It is good, be advantageous to large-scale promotion application.
In the embodiment that the present invention converts, the medical sludge also can transform to medical waste water, the medical waste water
By such as step S1 disinfect and as step S2 modifier treatment after, through eliminate " infectiousness " hazards, reach《Doctor
Treat mechanism pollution discharge standard》GB18466-2005 controls standard, can be immediately discharged to city planting ductwork.
Embodiment 1：
S1, sterilization：
Lime is added in sludge, the pH value of sludge will be adjusted to more than 11.5, to change bacteria live environment, utilizes carbonic acid
Calcium and water reaction generation calcium hydroxide, it is in strong basicity to make water quality, and the protein and nucleic acid of pathogen are destroyed using alkaline environment, is disturbed
Disorderly its eubolism, lead pathogenic microorganisms and bacterium is difficult to survive and it is dead, so as to reach the purpose of sludge disinfection；
It is S2, quenched：
S21, addition accounts for the coagulant that sludge total weight percent scope is 3% in the sludge by sterilization, and coagulant is to sludge
Colloidal particle plays electrostatic neutralization and net is caught volume and swept；
S22, add the flocculant for accounting for sludge total weight percent 0.2% again in the sludge after adding coagulant, accelerate sludge glue
Body particle flocculation process, the density of sludge colloidal particle coagulated particles is increased, strengthen adsorption bridging effect, give full play to net and catch work
With, reduce sludge colloidal particle resistivity, reduce sludge colloidal particle water content, obtain thickened sludge；
S3, filter-press dehydration：
Thickened sludge after modifier treatment is filtered by filtering equipment, control filtering equipment air pressure is in 1.5MPa
Between, the sludge cake of filtrate and moisture content below 68% is obtained, filtrate backflow re-starts quenched；
S4, low temperature drying：
Sludge cake after filter-press dehydration is dried under the conditions of 95 DEG C, moisture in sludge cake is further evaporated, contained
Sludge cake of the water rate below 55%.
Above sludge cake meets sterilization technology index, no spreading venereal diseases opportunistic pathogen after testing；The fecal coliform of sludge after processing
Group number≤100 (mpn/g), induced worm egg death rate ＞ 95%, reach《Discharge standard of water pollutants for medical organization》GB18466-2005
Control standard.
Embodiment 2：
S1, sterilization：
Lime is added in sludge, the pH value of sludge will be adjusted to more than 12.3；
It is S2, quenched：
S21, addition accounts for the coagulant that sludge total weight percent scope is 1% in the sludge by sterilization, and coagulant is to sludge
Colloidal particle plays electrostatic neutralization and net is caught volume and swept；
S22, add the flocculant for accounting for sludge total weight percent 0.12% again in the sludge after adding coagulant, accelerate sludge
Colloidal particle flocculation process, the density of sludge colloidal particle coagulated particles is increased, strengthen adsorption bridging effect, give full play to net and catch
Effect, sludge colloidal particle resistivity is reduced, reduce the water content of sludge colloidal particle, obtain thickened sludge；
S3, filter-press dehydration：
Thickened sludge after modifier treatment is filtered by filtering equipment, control filtering equipment air pressure is in 1.0MPa
Between, the sludge cake of filtrate and moisture content below 65% is obtained, filtrate backflow re-starts quenched；
S4, low temperature drying：
Sludge cake after filter-press dehydration is dried under the conditions of 115 DEG C, moisture in sludge cake is further evaporated, contained
Sludge cake of the water rate below 53%.
Above sludge cake meets sterilization technology index, no spreading venereal diseases opportunistic pathogen after testing；The fecal coliform of sludge after processing
Group number≤100 (mpn/g), induced worm egg death rate ＞ 95%, reach《Discharge standard of water pollutants for medical organization》GB18466-2005
Control standard.
Embodiment 3：
S1, sterilization：
Lime is added in sludge, the pH value of sludge will be adjusted to more than 12, to change bacteria live environment, utilizes calcium carbonate
Generation calcium hydroxide is reacted with water, it is in strong basicity to make water quality, and the protein and nucleic acid of pathogen are destroyed using alkaline environment, is upset
Its eubolism, lead pathogenic microorganisms and bacterium is difficult to survive and it is dead, so as to reach the purpose of sludge disinfection；
It is S2, quenched：
S21, addition accounts for the coagulant that sludge total weight percent scope is 9% in the sludge by sterilization, and coagulant is to sludge
Colloidal particle plays electrostatic neutralization and net is caught volume and swept；
S22, add the flocculant for accounting for sludge total weight percent 0.48% again in the sludge after adding coagulant, accelerate sludge
Colloidal particle flocculation process, the density of sludge colloidal particle coagulated particles is increased, strengthen adsorption bridging effect, give full play to net and catch
Effect, sludge colloidal particle resistivity is reduced, reduce the water content of sludge colloidal particle, obtain thickened sludge；
S3, filter-press dehydration：
Thickened sludge after modifier treatment is filtered by filtering equipment, control filtering equipment air pressure is in 2.1MPa
Between, the sludge cake of filtrate and moisture content below 63% is obtained, filtrate backflow re-starts quenched；
S4, low temperature drying：
Sludge cake after filter-press dehydration is dried under the conditions of 118 DEG C, moisture in sludge cake is further evaporated, contained
Sludge cake of the water rate below 50%.
Above sludge cake meets sterilization technology index, no spreading venereal diseases opportunistic pathogen after testing；The fecal coliform of sludge after processing
Group number≤100 (mpn/g), induced worm egg death rate ＞ 95%, reach《Discharge standard of water pollutants for medical organization》GB18466-2005
Control standard.
Fig. 1 is refer to, the invention also discloses a kind of one kind application medical sludge harmless treatment method as described above to enter
Row innocuity disposal system, it is characterised in that described device includes：
Sterilization pool, the sterilization pool are used to contain sludge, and addition lime carries out disinfection；
Comprehensive treatment tank, the comprehensive treatment tank are used to turn to contain the sludge after sterilization, add coagulant and flocculant process
Obtain thickened sludge；
Thickened sludge progress filter-press dehydration is obtained moisture content below 70% by plate and frame type filter-press, the plate and frame type filter-press
Sludge cake；In the embodiment of the conversion of the present invention, the plate and frame type filter-press can also be other kinds of filter press, as long as
The effect of filter-press dehydration can be realized.
Sludge cake of the moisture content below 70% is carried out heating, drying extremely by rotating drum type drying machine, the rotating drum type drying machine
Sludge cake of the moisture content below 55%.In the embodiment of the conversion of the present invention, the rotating drum type drying machine can also be other
The filter press of type, as long as the effect of drying control water can be realized.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technical concept
Other various corresponding changes and deformation are made, and all these changes and deformation should all belong to the protection of the claims in the present invention
Scope.
Claims (3)
1. a kind of medical sludge harmless treatment method, it is characterised in that methods described includes：
S1, sterilization：
Lime is added in sludge, the pH value of sludge will be adjusted to more than 11.5；
It is S2, quenched：
S21, addition accounts for the coagulant that sludge total weight percent scope is 1% ~ 10% in the sludge by sterilization；
S22, add the flocculant for accounting for sludge total weight percent 0.1% ~ 0.5% again in the sludge after adding coagulant, obtain
Thickened sludge；
S3, filter-press dehydration：
Thickened sludge after modifier treatment is filtered by filtering equipment, control filtering equipment air pressure is in 0.8MPa-
Between 2.2MPa, filtrate and the moisture content sludge cake below 70% are obtained, filtrate backflow re-starts quenched；
S4, low temperature drying：
Sludge cake after filter-press dehydration is dried under the conditions of 90 DEG C ~ 120 DEG C, obtains sludge of the moisture content below 55%
Cake.
2. a kind of medical sludge harmless treatment method according to claim 1, it is characterised in that after step s4 also
Including step S5, the sludge cake of low temperature drying is subjected to landfill disposal.
3. a kind of one kind application medical sludge harmless treatment method as any one of claim 1-2 carries out innoxious place
Reason system, it is characterised in that described device includes：
Sterilization pool, the sterilization pool are used to contain sludge, and addition lime carries out disinfection；
Comprehensive treatment tank, the comprehensive treatment tank are used to turn to contain the sludge after sterilization, add coagulant and flocculant process
Obtain thickened sludge；
Thickened sludge progress filter-press dehydration is obtained moisture content below 70% by plate and frame type filter-press, the plate and frame type filter-press
Sludge cake；
Sludge cake of the moisture content below 70% is carried out heating, drying to aqueous by rotating drum type drying machine, the rotating drum type drying machine
Sludge cake of the rate below 55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710529084.1A CN107352761A (en) | 2017-07-01 | 2017-07-01 | A kind of medical sludge harmless treatment method and its system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710529084.1A CN107352761A (en) | 2017-07-01 | 2017-07-01 | A kind of medical sludge harmless treatment method and its system |
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| CN107352761A true CN107352761A (en) | 2017-11-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592044A (en) * | 2018-04-23 | 2018-09-28 | 武汉永清环保科技工程有限公司 | A kind of method that power plant soot mixes medical sludge incineration |
| CN109351762A (en) * | 2018-12-17 | 2019-02-19 | 巩义市相济装配构件有限公司 | A kind of polyaluminium chloride water purification agent waste residue innocuity disposal system and technique |
| CN113480120A (en) * | 2021-07-26 | 2021-10-08 | 沈阳环境科学研究院 | Vehicle-mounted disinfection and deep dehydration integrated device and operation method thereof |
| CN113620535A (en) * | 2021-08-25 | 2021-11-09 | 产学研(广州)环境服务有限公司 | Composite medical wastewater treatment system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000015241A (en) * | 1998-06-29 | 2000-01-18 | Plantec Inc | Medical waste water treatment equipment and treatment method thereof |
| CN2632085Y (en) * | 2003-06-04 | 2004-08-11 | 清华同方股份有限公司 | Movable sludge treating apparatus by drying process |
-
2017
- 2017-07-01 CN CN201710529084.1A patent/CN107352761A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000015241A (en) * | 1998-06-29 | 2000-01-18 | Plantec Inc | Medical waste water treatment equipment and treatment method thereof |
| CN2632085Y (en) * | 2003-06-04 | 2004-08-11 | 清华同方股份有限公司 | Movable sludge treating apparatus by drying process |
Non-Patent Citations (1)
| Title |
|---|
| 建筑设备工程: "《中国土木建筑百科辞典》", 31 May 1999, 中国建筑工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592044A (en) * | 2018-04-23 | 2018-09-28 | 武汉永清环保科技工程有限公司 | A kind of method that power plant soot mixes medical sludge incineration |
| CN109351762A (en) * | 2018-12-17 | 2019-02-19 | 巩义市相济装配构件有限公司 | A kind of polyaluminium chloride water purification agent waste residue innocuity disposal system and technique |
| CN113480120A (en) * | 2021-07-26 | 2021-10-08 | 沈阳环境科学研究院 | Vehicle-mounted disinfection and deep dehydration integrated device and operation method thereof |
| CN113620535A (en) * | 2021-08-25 | 2021-11-09 | 产学研(广州)环境服务有限公司 | Composite medical wastewater treatment system and method |
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Application publication date: 20171117 |
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