CN108892354A - A kind of method of municipal sludge dehydration - Google Patents
A kind of method of municipal sludge dehydration Download PDFInfo
- Publication number
- CN108892354A CN108892354A CN201810860590.3A CN201810860590A CN108892354A CN 108892354 A CN108892354 A CN 108892354A CN 201810860590 A CN201810860590 A CN 201810860590A CN 108892354 A CN108892354 A CN 108892354A
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- sludge
- catalyst
- municipal sludge
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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
- C02F11/14—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
- C02F11/00—Treatment of sludge; Devices therefor
-
- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
A kind of method of municipal sludge dehydration, is related to environment protection field, and sludge and sludge treating agent, catalyst are mixed to get mixture；Mixture is subjected to ultraviolet light, ultrasonic cavitation and filters pressing again.Sludge treating agent is made of flocculant and oxidant, and reaction can be carried out to the bacterium in sludge, virus, worm's ovum and breaks cell wall, reaches and effectively kills and adsorption and sedimentation effect.Catalyst then can prevent sludge from occurring degenerating smelly phenomenon with the degradation of catalyzing organic.The ultraviolet light and ultrasonic cavitation that then carry out then can be further improved the degradation of bactericidal effect and organic matter, improve clean-up effect.Its operating method is simple, not high to equipment requirement, can efficiently remove the impurity such as bacterium, virus, worm's ovum, the organic matter in municipal sludge while high-efficiency dehydration, be appropriate for promoting the use of.
Description
Technical field
The present invention relates to environment protection fields, in particular to a kind of method of municipal sludge dehydration.
Background technique
With the fast development of social economy and urbanization, municipal wastewater discharge amount and treating capacity constantly increase in city,
A large amount of sludge caused by municipal wastewater processing bring new challenge to The Surroundings in Cities management.The water content of municipal sludge exists
90% or more, jelly, have the characteristics that volume is big, light specific gravity, easy corruption distribute stench, the processing and conveyer belt to sludge come
It is difficult.And containing various objectionable impurities such as a large amount of bacterium, virus, worm's ovum, heavy metals in municipal sludge, if dealt with improperly
It is easy to cause serious problem of environmental pollution and safe and healthy problem.
The dehydration of sludge refers to using the method for physics and chemistry, and the moisture content of sludge is reduced to 60% or less.Dehydration
Sludge afterwards not only transports, it is more convenient to deal with, but also its calorific value with higher, can be used for power generation by waste combustion, has
Preferable using energy source value.How while being preferably dehydrated, carrying out harmless treatment to municipal sludge is the neck
The important directions of domain development.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of municipal sludge dehydration, and operating method is simple, to equipment
It is of less demanding, it is miscellaneous can to effectively remove bacterium, virus, worm's ovum, organic matter in municipal sludge etc. while high-efficiency dehydration
Matter.
What the embodiment of the present invention was realized in：
A kind of method of municipal sludge dehydration comprising：
Sludge and sludge treating agent, catalyst are mixed to get mixture；Mixture is subjected to ultraviolet light, ultrasonic wave
Cavitation and filters pressing；
Wherein, in parts by weight, sludge treating agent includes：150~250 parts of flocculant, 100~200 parts of oxidant；
Catalyst is rare metal oxide.
The beneficial effect of the embodiment of the present invention is：
The embodiment of the invention provides a kind of method of municipal sludge dehydration, by sludge and sludge treating agent, urge
Agent is mixed to get mixture；Mixture is subjected to ultraviolet light, ultrasonic cavitation and filters pressing again.Sludge treating agent by
Flocculant and oxidant are constituted, and reaction can be carried out to the bacterium in sludge, virus, worm's ovum and breaks cell wall, reaches effective
It kills and adsorption and sedimentation effect.Catalyst then can prevent sludge from occurring degenerating smelly phenomenon with the degradation of catalyzing organic.With
The ultraviolet light and ultrasonic cavitation that carry out afterwards then can be further improved the degradation of bactericidal effect and organic matter, improve purification
Effect.Its operating method is simple, not high to equipment requirement, can efficiently remove in municipal sludge while high-efficiency dehydration
The impurity such as bacterium, virus, worm's ovum, organic matter, be appropriate for promoting the use of.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
A kind of method of municipal sludge dehydration of the embodiment of the present invention is specifically described below.
The embodiment of the invention provides a kind of methods of municipal sludge dehydration comprising：
S1. sludge and sludge treating agent, catalyst are mixed to get mixture.
The water content of municipal sludge is 90% or more, and jelly, with volume, big, light specific gravity, easy corruption distribute stench etc.
Feature, processing and conveyer belt to sludge come difficult.And contain a large amount of bacterium, virus, worm's ovum, heavy metal in municipal sludge
Etc. various objectionable impurities, serious problem of environmental pollution and safe and healthy problem are be easy to cause if dealt with improperly.
Wherein, in parts by weight, sludge treating agent includes：150~250 parts of flocculant, 100~200 parts of oxidant；
Catalyst is rare metal oxide.
Further, flocculant includes at least one of inorganic flocculating agent and organic flocculant.Flocculant is mainly
It is close to each other with negative (just) electrical some particles for being difficult to separate or particle in group and water with positive (negative) electrical property,
Reduce its potential, be at unstable state, and using its aggregation property these particles are concentrated, and by physics or
Chemical method is separated.Wherein, at least one in inorganic flocculating agent aluminium polychloride, polyaluminium sulfate and polymeric aluminum sulfate iron
Kind.Organic flocculant includes polyacrylamide, and polyacrylamide can be cationic or anionic, cationic polypropylene
The cation concn of amide is 2.8~52.6%, and the ionic weight of anion-polyacrylamide is 100~38,000,000.
Oxidant includes at least one of ozone, Peracetic acid, ferric sulfate, sodium chlorate and sodium hypochlorite.Oxidant can
With destroy bacterium, virus, worm's ovum cell wall, achieve the purpose that kill.Secondly, oxidant can to the organic matter in sludge into
Row oxidation, promotes the degradation of organic matter, achievees the purpose that anti-corrosion deodorization.
Catalyst is rare metal oxide, it is preferable that catalyst includes at least one of lanthana and europium oxide,
It is made by high temperature.Catalyst can promote oxidant to the oxidation reaction of organic matter, thus preferably to organic matter into
Row degradation.
Further, in embodiments of the present invention, the mass ratio of sludge, sludge treating agent and catalyst is 1：0.2~
0.8：0.02~0.1.Inventor has found by creative work, by sludge, sludge treating agent and catalyst according to aforementioned proportion
It is preferable for the removal effect of the impurity such as bacterium, virus, worm's ovum, organic matter in sludge after mixing.
Preferably, when being mixed sludge with sludge treating agent, catalyst, acid or alkali are added by the pH value of mixture
It is adjusted to neutrality.Under normal conditions, municipal sludge is since there is a large amount of organic matter, pH value slant acidity is needed by adding
Add alkali, such as lime, caustic soda, soda ash etc., to be neutralized.The stability of colloidal sludge can be destroyed by adjusting pH, make impurity
Preferably sedimentation, and the living environment for destroying bacterium, virus, worm's ovum etc..Preferably, in terms of the quality of sludge, every kilogram of sludge
The dosage of middle alkali is 3.5~221g.
Further, sludge, sludge treating agent and catalyst be stirred to 5 under the revolving speed of 100~2000r/min~
127min.Under the above conditions, mixing is more abundant, and sludge, sludge treating agent and catalyst three can be allowed more sufficient
Hybrid reaction.
Further, a kind of method of municipal sludge dehydration provided by the embodiment of the present invention further includes：
S2. mixture is subjected to ultraviolet light, ultrasonic cavitation and filters pressing.
Wherein, when carrying out ultraviolet light, the wave-length coverage of ultraviolet light is 50~400nm, and intensity is 100~500W.It is purple
External exposure can further in sludge bacterium and virus kill, reach better bacteria-eliminating efficacy.
When carrying out ultrasonic cavitation, the acoustic density of ultrasonic wave is 0.1~1.0W/ml, pulse ratio 0.1：1~30：1,
Energy range is 50000~200000kJ/kg, and power is 100~1000W/kg, and frequency is 50~200kHz.Ultrasonic cavitation can
To accelerate reaction process, the organic matter in sludge is promoted more efficiently to degrade.Preferably, carry out ultrasonic cavitation when, be
It is carried out in magnetic field, magnetic field strength is 10.0~50.0T.Magnetic field can act on and the charged particle in sludge, magnetic dirt
Object is contaminated, promotes them to assemble sedimentation, achievees the purpose that removal of impurities.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present invention provides a kind of method of municipal sludge dehydration comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.2:0.02 mass ratio is stirred mixing, is mixed
Close object；
Wherein, in parts by weight, sludge treating agent includes：
80 parts of polyaluminium sulfate, 70 parts of polyacrylamide, 20 parts of ferric sulfate, 40 parts of ozone, 80 parts of Peracetic acid, hypochlorous acid
60 parts and 30 parts of alkali of sodium；Catalyst is lanthana；The revolving speed being stirred is 100r/min, time 125min.
S2. ultraviolet light is carried out to said mixture, the wavelength of ultraviolet light is 100nm, intensity 500W.
S3. ultrasonic cavitation is carried out in magnetic field to the mixture after ultraviolet light, wherein the acoustic density of ultrasonic wave
For 0.5W/ml, pulse ratio 0.1：1, energy range 50000kJ/kg, power 1000W/kg, frequency 200kHz, magnetic field
Intensity is 10.0T.
S4. filters pressing is carried out to the mixture after ultrasonic cavitation.
Embodiment 2
The present invention provides a kind of method of municipal sludge dehydration comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.8:0.1 mass ratio is stirred mixing, is mixed
Close object；
Wherein, in parts by weight, sludge treating agent includes：
150 parts of polyaluminium sulfate, 100 parts of aluminium polychloride, 20 parts of ozone, 50 parts of sodium chlorate, 30 parts of sodium hypochlorite and alkali
25 parts；Catalyst is europium oxide；The revolving speed being stirred is 1000r/min, time 15min.
S2. ultraviolet light is carried out to said mixture, the wavelength of ultraviolet light is 400nm, intensity 100W.
S3. ultrasonic cavitation is carried out in magnetic field to the mixture after ultraviolet light, wherein the acoustic density of ultrasonic wave
For 1.0W/ml, pulse ratio 30：1, energy range 200000kJ/kg, power 500W/kg, frequency 1000kHz, magnetic field
Intensity is 50.0T.
S4. filters pressing is carried out to the mixture after ultrasonic cavitation.
Embodiment 3
The present invention provides a kind of method of municipal sludge dehydration comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.5:0.06 mass ratio is stirred mixing, is mixed
Close object；
Wherein, in parts by weight, sludge treating agent includes：
60 parts of polymeric aluminum sulfate iron, 40 parts of polyacrylamide, 80 parts of aluminium polychloride, 20 parts of ferric sulfate, 25 parts of ozone, mistake
40 parts of fluoroacetic acid, 30 parts of sodium chlorate, 25 parts of sodium hypochlorite and 40 parts of alkali；Catalyst is lanthana；The revolving speed being stirred is
2000r/min, time 5min.
S2. ultraviolet light is carried out to said mixture, the wavelength of ultraviolet light is 50nm, intensity 500W.
S3. ultrasonic cavitation is carried out in magnetic field to the mixture after ultraviolet light, wherein the acoustic density of ultrasonic wave
For 0.5W/ml, pulse ratio 10：1, energy range 100000kJ/kg, power 100W/kg, frequency 100kHz, magnetic field
Intensity is 20.0T.
S4. filters pressing is carried out to the mixture after ultrasonic cavitation.
Embodiment 4
The present invention provides a kind of method of municipal sludge dehydration comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.4:0.08 mass ratio is stirred mixing, is mixed
Close object；
Wherein, in parts by weight, sludge treating agent includes：
100 parts of polyacrylamide, 80 parts of aluminium polychloride, 50 parts of ozone, 30 parts of Peracetic acid, 30 parts of sodium chlorate, secondary chlorine
20 parts and 25 parts of alkali of sour sodium；Catalyst is europium oxide；The revolving speed being stirred is 500r/min, time 80min.
S2. ultraviolet light is carried out to said mixture, the wavelength of ultraviolet light is 200nm, intensity 200W.
S3. ultrasonic cavitation is carried out in magnetic field to the mixture after ultraviolet light, wherein the acoustic density of ultrasonic wave
For 0.3W/ml, pulse ratio 5：1, energy range 80000kJ/kg, power 600W/kg, frequency 150kHz, magnetic field are strong
Degree is 30.0T.
S4. filters pressing is carried out to the mixture after ultrasonic cavitation.
Test example 1
Method treated the sludge of municipal sludge dehydration provided by Examples 1 to 4 is chosen, and with unprocessed
Sludge as a comparison case, the indexs such as its moisture content, partial size are tested, test result is as shown in table 1.
1 sludge indices test result of table
As can be seen from Table 1, using a kind of method of municipal sludge dehydration provided by the embodiment of the present invention 1~4
After processed, the moisture content of sludge can be reduced to 50% hereinafter, significantly lower than in industry for moisture content after sludge dewatering≤
60% standard.Meanwhile partial size is down to 1mm or so by 21mm, it is obvious for the thinning effect of sludge.In worm's ovum and bacterium
Aspect, treated sludge are killed, induced worm egg death rate is up to 99.9%, and excrement colibacillus group value is 0.02 or so, is had
Preferably remove worm's ovum, bacteria-eliminating efficacy.
In conclusion the embodiment of the invention provides a kind of methods of municipal sludge dehydration, by sludge and sludge
Inorganic agent, catalyst are mixed to get mixture；Mixture is subjected to ultraviolet light, ultrasonic cavitation and filters pressing again.Sludge
Inorganic agent is made of flocculant and oxidant, and reaction can be carried out to the bacterium in sludge, virus, worm's ovum and breaks cell wall, is reached
To effectively killing and adsorption and sedimentation effect.Catalyst then can prevent sludge from corruption occur smelly with the degradation of catalyzing organic
The phenomenon that.The ultraviolet light and ultrasonic cavitation that then carry out then can be further improved the drop of bactericidal effect and organic matter
Solution improves clean-up effect.Its operating method is simple, not high to equipment requirement, can efficiently remove while high-efficiency dehydration
The impurity such as bacterium, virus, worm's ovum, organic matter in municipal sludge, are appropriate for promoting the use of.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method of municipal sludge dehydration, which is characterized in that including：
Sludge and sludge treating agent, catalyst are mixed to get mixture；The mixture is subjected to ultraviolet light, ultrasonic wave
Cavitation and filters pressing；
Wherein, in parts by weight, the sludge treating agent includes：150~250 parts of flocculant, 100~200 parts of oxidant；
The catalyst is rare metal oxide.
2. the method for municipal sludge dehydration according to claim 1, which is characterized in that the sludge, the sludge
The mass ratio of inorganic agent and the catalyst is 1：0.2~0.8：0.02~0.1.
3. the method for municipal sludge dehydration according to claim 1 or 2, which is characterized in that the flocculant includes
At least one of aluminium polychloride, polyacrylamide, polyaluminium sulfate and polymeric aluminum sulfate iron.
4. the method for municipal sludge dehydration according to claim 1 or 2, which is characterized in that the oxidant includes
At least one of ozone, Peracetic acid, ferric sulfate, sodium chlorate and sodium hypochlorite.
5. the method for municipal sludge dehydration according to claim 1, which is characterized in that the catalyst includes oxidation
At least one of lanthanum and europium oxide.
6. the method for municipal sludge dehydration according to claim 1, which is characterized in that by sludge and Treatment of Sludge
When agent, catalyst are mixed, the pH value of the mixture is adjusted to neutrality by addition acid or alkali.
7. the method for municipal sludge dehydration according to claim 1, which is characterized in that by the sludge, the dirt
Mud inorganic agent and the catalyst are stirred 5~127min under the revolving speed of 100~2000r/min.
8. the method for municipal sludge dehydration according to claim 1, which is characterized in that when carrying out ultraviolet light,
The wave-length coverage of ultraviolet light is 50~400nm, and intensity is 100~500W.
9. the method for municipal sludge dehydration according to claim 8, which is characterized in that when carrying out ultrasonic cavitation,
The acoustic density of ultrasonic wave is 0.1~1.0W/ml, pulse ratio 0.1：1~30：1, energy range is 50000~200000kJ/
Kg, power are 100~1000W/kg, and frequency is 50~200kHz.
10. the method for municipal sludge dehydration according to claim 9, which is characterized in that when carrying out ultrasonic cavitation,
It is to be carried out in magnetic field, magnetic field strength is 10.0~50.0T.
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| CN201810860590.3A CN108892354A (en) | 2018-08-01 | 2018-08-01 | A kind of method of municipal sludge dehydration |
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| CN201810860590.3A CN108892354A (en) | 2018-08-01 | 2018-08-01 | A kind of method of municipal sludge dehydration |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336353A (en) * | 2018-12-07 | 2019-02-15 | 杭州萧山环境投资发展有限公司 | A kind of online Opsonizing method of deeply dehydrating sludge |
| CN112479558A (en) * | 2021-01-04 | 2021-03-12 | 上海万狮环保科技有限公司 | Organic sludge conditioner, preparation method and application |
| CN113029981A (en) * | 2021-03-08 | 2021-06-25 | 长春工程学院 | Method for detecting sludge total phosphorus of urban sewage plant |
| CN113402141A (en) * | 2021-05-26 | 2021-09-17 | 北京科技大学 | Method for anaerobic digestion of excess sludge |
| CN114057368A (en) * | 2021-12-07 | 2022-02-18 | 威海中远造船科技有限公司 | Activated sludge reduction treatment system and method |
| CN114538727A (en) * | 2022-03-30 | 2022-05-27 | 卓越医药科技(大连)有限公司 | Deodorizing wall-breaking agent and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112479558A (en) * | 2021-01-04 | 2021-03-12 | 上海万狮环保科技有限公司 | Organic sludge conditioner, preparation method and application |
| CN113029981A (en) * | 2021-03-08 | 2021-06-25 | 长春工程学院 | Method for detecting sludge total phosphorus of urban sewage plant |
| CN113402141A (en) * | 2021-05-26 | 2021-09-17 | 北京科技大学 | Method for anaerobic digestion of excess sludge |
| CN114057368A (en) * | 2021-12-07 | 2022-02-18 | 威海中远造船科技有限公司 | Activated sludge reduction treatment system and method |
| CN114538727A (en) * | 2022-03-30 | 2022-05-27 | 卓越医药科技(大连)有限公司 | Deodorizing wall-breaking agent and application thereof |
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