CN108249735A - A kind of municipal sludge processing method - Google Patents
A kind of municipal sludge processing method Download PDFInfo
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- CN108249735A CN108249735A CN201711458466.6A CN201711458466A CN108249735A CN 108249735 A CN108249735 A CN 108249735A CN 201711458466 A CN201711458466 A CN 201711458466A CN 108249735 A CN108249735 A CN 108249735A
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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
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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
- C02F11/02—Biological treatment
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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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- 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
- C10B1/00—Retorts
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- 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
- 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
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
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- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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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
- C02F2303/04—Disinfection
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of municipal sludge processing methods, include the following steps：1) sulfide or/and elemental sulfur are added in municipal sludge, 10~35 DEG C are cultivated 2~4 days, then carry out press filtration, obtain filtrate and filter cake；2) filter cake is added in into retort, 480~520 DEG C of 5~10h of carbonization-activation, then crushes, sieves, obtain active carbon particle, the exhaust gas that retort generates is passed through in filtrate；3) sewage-treating agent is added in filtrate, abundant mixing, press filtration, clear liquid direct emission, mud cake, which is concentrated, to be filled.Municipal sludge processing method processing cost of the invention is low, high treating effect, the moisture content of the mud cake finally obtained is low, not only the microorganisms such as pathogen in sludge are thoroughly killed, and the heavy metal ion in sludge is fully converted to stable compound, are not easy to dissolve out.
Description
Technical field
The present invention relates to a kind of municipal sludge processing methods.
Background technology
This reform and open up to the outside world in decades, China's economy rapid development, the level of urbanization is constantly deepened, and urban size is increasingly
Greatly, the discharge capacity of sanitary sewage and handling rate are being continuously improved.By 2015, the sum of China's urban wastewater treatment firm was
Through more than 3000, overall design processing capacity is more than 2 billion cubic meters.It is dirty that a large amount of municipal administration will be generated in sewage disposal process
Mud is calculated with water content 80%, and China's sludge annual output alreadys exceed 30,000,000 tons, and cumulative year after year, it is contemplated that the year two thousand twenty,
60,000,000 tons will be broken through, the process problem of municipal sludge becomes increasingly conspicuous.
Contain a large amount of organic pollution, inorganic pollution, pathogen, heavy metal element etc. in municipal sludge, it is necessary to right
Sludge is dealt carefully with, and sludge could effectively be avoided to pollute the environment and damage to the mankind.At present, municipal sludge
It is general moisture content is down to 80% by concentration, filter-press dehydration after just transport outward and throw aside or simply stack, only less than 1/3 into
The processing such as sanitary landfills, burning or compost land use are gone, it is easy to secondary pollution be caused to water resource and land resource, sternly
Ghost image rings surrounding enviroment.In addition, sanitary landfills, burning or compost soil etc. reason mode all there are it is apparent the defects of.Health is filled out
Bury need by the moisture content of municipal sludge be down to 60% hereinafter, municipal sludge drying it is of high cost, energy consumption is big, and in municipal sludge
The pollutants such as heavy metal ion also be easy to cause secondary pollution；Sludge incineration requirement by the moisture content of sludge be down to 50% with
Under, energy consumption is big, and burns the exhaust gas generated and also need to carry out extra process, and processing cost is high；Although compost land use can be with
By sludge secondary use, but the poisonous and harmful substances such as heavy metal ion, pathogen in sludge easily cause secondary pollution.
Therefore, it is necessary to develop, a kind of processing cost is low, municipal sludge processing method of high treating effect.
Invention content
The purpose of the present invention is to provide a kind of municipal sludge processing methods.
The technical solution used in the present invention is：
A kind of municipal sludge processing method, includes the following steps：
1) sulfide or/and elemental sulfur are added in municipal sludge, 10~35 DEG C are cultivated 2~4 days, then carry out press filtration, are obtained
To filtrate and filter cake；
2) filter cake is added in into retort, 480~520 DEG C of 5~10h of carbonization-activation, then crushes, sieves, obtain activity
Charcoal particle, the exhaust gas that retort generates are passed through in filtrate；
3) sewage-treating agent is added in filtrate, abundant mixing, press filtration, clear liquid direct emission, mud cake, which is concentrated, to be filled.
Sulfide described in step 1) is FeS, Na2S、MoS2At least one of.
The additive amount of sulfide or/and elemental sulfur described in step 1) is the 5%~8% of municipal sludge quality.
Sewage-treating agent described in step 3) by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, molysite or/and ferrous salt,
Activated carbon forms, and additive amount is the 5%~15% of filtrate quality.
Sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, molysite or/and the ferrous salt, the mass ratio of activated carbon are 1：
(0.4~0.6)：(0.2~0.4)：(4~5)：(0.4~0.6).
The molysite is at least one of ferric sulfate, ferric nitrate, iron chloride, poly-ferric chloride, bodied ferric sulfate.
The ferrous salt is at least one of ferrous sulfate, ferrous nitrate, frerrous chloride.
The activated carbon is active carbon particle prepared by step 2).
Step 1) and 3) in press filtration operating pressure for 0.3~0.8MPa, time of filter pressing is 20~40min.
The beneficial effects of the invention are as follows：Municipal sludge processing method processing cost of the invention is low, high treating effect, finally
The moisture content of obtained mud cake is low, and not only the microorganisms such as pathogen in sludge are thoroughly killed, and the huge sum of money in sludge
Belong to ion and be fully converted to stable compound, be not easy to dissolve out.
1) present invention can promote to vulcanize bacterium rapid growth by adding sulfide or/and elemental sulfur in municipal sludge
Breeding, it is suppressed that the growth of other bacteriums, and the growth and breeding for vulcanizing bacterium can change the micelle structure in sludge, make in sludge
Water free state is converted by reference state, be conducive to subsequent filter-press dehydration, the moisture content of sludge can be down to after filter-press dehydration
50% or so；
2) present invention can not only kill the disease in sludge by carrying out high temperature carbonization activation to the sludge after filter-press dehydration
The microorganisms such as substance, can be with output activated carbon, can be as the raw material of next step water process；
3) present invention is handled the filtrate being press-filtered out by sewage-treating agent, can be by the heavy metal ion in filtrate
It is fully converted to be not easy the precipitation dissolved out.
Specific embodiment
A kind of municipal sludge processing method, includes the following steps：
1) sulfide or/and elemental sulfur are added in municipal sludge, 10~35 DEG C are cultivated 2~4 days, then carry out press filtration, are obtained
To filtrate and filter cake；
2) filter cake is added in into retort, 480~520 DEG C of 5~10h of carbonization-activation, then crushes, sieves, obtain activity
Charcoal particle, the exhaust gas that retort generates are passed through in filtrate；
3) sewage-treating agent is added in filtrate, abundant mixing, press filtration, clear liquid direct emission, mud cake, which is concentrated, to be filled.
Preferably, the sulfide described in step 1) is FeS, Na2S、MoS2At least one of.
Preferably, the additive amount of the sulfide described in step 1) or/and elemental sulfur is the 5%~8% of municipal sludge quality.
Preferably, the sewage-treating agent described in step 3) by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, molysite or/and
Ferrous salt, activated carbon composition, additive amount are the 5%~15% of filtrate quality.
Preferably, the matter of the sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, molysite or/and ferrous salt, activated carbon
Amount is than being 1：(0.4~0.6)：(0.2~0.4)：(4~5)：(0.4~0.6).
Preferably, the molysite be ferric sulfate, ferric nitrate, iron chloride, poly-ferric chloride, in bodied ferric sulfate at least
It is a kind of.
Preferably, the ferrous salt is at least one of ferrous sulfate, ferrous nitrate, frerrous chloride.
Preferably, the activated carbon is active carbon particle prepared by step 2).
Preferably, step 1) and 3) in press filtration operating pressure for 0.3~0.8MPa, time of filter pressing is 20~40min.
The present invention is made further explanation and description with reference to specific embodiment.
Embodiment 1：
A kind of municipal sludge processing method, includes the following steps：
1) FeS (additive amount is the 5% of municipal sludge quality) is added in municipal sludge, 30 DEG C are cultivated 2 days, under 0.5MPa
Press filtration 30min, obtains filtrate and filter cake；
2) filter cake is added in into retort, 520 DEG C of carbonization-activation 7h, then crushes, sieves, obtain active carbon particle, charcoal
Change the exhaust gas that stove generates to be passed through in filtrate；
3) sewage-treating agent is added in filtrate (by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, ferric sulfate, step 2
The activated carbon of preparation is according to mass ratio 1:0.5:0.3:4:0.6 composition, additive amount are the 5% of filtrate quality), abundant mixing,
Press filtration 30min under 0.8MPa, clear liquid direct emission, mud cake concentrate landfill.
After tested, the filter cake moisture content of step 1) is 52%, and the active carbon particle specific surface area that step 2) obtains is
1200m2/ g, COD is 74mg/L, SS 45mg/L in the stillness of night of step 3).
Embodiment 2：
A kind of municipal sludge processing method, includes the following steps：
1) FeS (additive amount is the 5% of municipal sludge quality) is added in municipal sludge, 15 DEG C are cultivated 4 days, under 0.8MPa
Press filtration 40min, obtains filtrate and filter cake；
2) filter cake is added in into retort, 520 DEG C of carbonization-activation 5h, then crushes, sieves, obtain active carbon particle, charcoal
Change the exhaust gas that stove generates to be passed through in filtrate；
3) sewage-treating agent is added in filtrate (by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, iron chloride and chlorination
Activated carbon prepared by ferrous, step 2 is according to mass ratio 1:0.4:0.4:5:0.6 composition, additive amount are the 10% of filtrate quality),
Abundant mixing, press filtration 40min under 0.8MPa, clear liquid direct emission, mud cake concentrate landfill.
After tested, the filter cake moisture content of step 1) is 54%, and the active carbon particle specific surface area that step 2) obtains is
1120m2/ g, COD is 58mg/L, SS 33mg/L in the stillness of night of step 3).
Embodiment 3：
A kind of municipal sludge processing method, includes the following steps：
1) Na is added in municipal sludge2S (additive amount is the 7% of municipal sludge quality), 30 DEG C are cultivated 2 days, 0.5MPa
Lower press filtration 40min, obtains filtrate and filter cake；
2) filter cake is added in into retort, 500 DEG C of carbonization-activation 8h, then crushes, sieves, obtain active carbon particle, charcoal
Change the exhaust gas that stove generates to be passed through in filtrate；
3) sewage-treating agent is added in filtrate (by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, ferric sulfate and polymerization
Activated carbon prepared by iron chloride, step 2 is according to mass ratio 1:0.5:0.4:4:0.4 composition, additive amount are the 8% of filtrate quality),
Abundant mixing, press filtration 30min under 0.5MPa, clear liquid direct emission, mud cake concentrate landfill.
After tested, the filter cake moisture content of step 1) is 50%, and the active carbon particle specific surface area that step 2) obtains is
1050m2/ g, COD is 65mg/L, SS 40mg/L in the stillness of night of step 3).
Embodiment 4：
A kind of municipal sludge processing method, includes the following steps：
1) FeS and Na is added in municipal sludge2S (total addition level is the 6% of municipal sludge quality), 35 DEG C are cultivated 3 days,
Press filtration 20min under 0.5MPa, obtains filtrate and filter cake；
2) filter cake is added in into retort, 500 DEG C of carbonization-activation 7h, then crushes, sieves, obtain active carbon particle, charcoal
Change the exhaust gas that stove generates to be passed through in filtrate；
3) sewage-treating agent is added in filtrate (by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, ferric sulfate, step 2
The activated carbon of preparation is according to mass ratio 1:0.6:0.2:4:0.5 composition, additive amount are the 15% of filtrate quality), abundant mixing,
Press filtration 20min under 0.5MPa, clear liquid direct emission, mud cake concentrate landfill.
After tested, the filter cake moisture content of step 1) is 49%, and the active carbon particle specific surface area that step 2) obtains is
1100m2/ g, COD is 42mg/L, SS 30mg/L in the stillness of night of step 3).
Embodiment 5：
A kind of municipal sludge processing method, includes the following steps：
1) elemental sulfur (additive amount is the 8% of municipal sludge quality) is added in municipal sludge, 25 DEG C are cultivated 4 days,
Press filtration 40min under 0.3MPa, obtains filtrate and filter cake；
2) filter cake is added in into retort, 480 DEG C of carbonization-activation 10h, then crushes, sieves, obtain active carbon particle, charcoal
Change the exhaust gas that stove generates to be passed through in filtrate；
3) sewage-treating agent is added in filtrate (by sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, ferrous sulfate, step
2 activated carbons prepared are according to mass ratio 1:0.5:0.4:4.5:0.5 composition, additive amount are the 5% of filtrate quality), abundant mixing,
Press filtration 40min under 0.3MPa, clear liquid direct emission, mud cake concentrate landfill.
After tested, the filter cake moisture content of step 1) is 47%, and the active carbon particle specific surface area that step 2) obtains is
970m2/ g, COD is 88mg/L, SS 50mg/L in the stillness of night of step 3).
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (9)
1. a kind of municipal sludge processing method, it is characterised in that：Include the following steps：
1) sulfide or/and elemental sulfur are added in municipal sludge, 10~35 DEG C are cultivated 2~4 days, then carry out press filtration, are filtered
Liquid and filter cake；
2) filter cake is added in into retort, 480~520 DEG C of 5~10h of carbonization-activation, then crushes, sieves, obtain activated carbon
Grain, the exhaust gas that retort generates are passed through in filtrate；
3) sewage-treating agent is added in filtrate, abundant mixing, press filtration, clear liquid direct emission, mud cake, which is concentrated, to be filled.
2. municipal sludge processing method according to claim 1, it is characterised in that：Sulfide described in step 1) is FeS,
Na2S、MoS2At least one of.
3. municipal sludge processing method according to claim 1, it is characterised in that：Sulfide described in step 1) or/and
The additive amount of elemental sulfur is the 5%~8% of municipal sludge quality.
4. municipal sludge processing method according to claim 1, it is characterised in that：Sewage-treating agent described in step 3) by
Sodium metasilicate, sodium hypochlorite, precipitated calcium carbonate, molysite or/and ferrous salt, activated carbon composition, additive amount are the 5% of filtrate quality
~15%.
5. municipal sludge processing method according to claim 4, it is characterised in that：The sodium metasilicate, sodium hypochlorite,
Precipitated calcium carbonate, molysite or/and ferrous salt, activated carbon mass ratio be 1：(0.4~0.6)：(0.2~0.4)：(4~5)：
(0.4~0.6).
6. municipal sludge processing method according to claim 4 or 5, it is characterised in that：The molysite is ferric sulfate, nitre
At least one of sour iron, iron chloride, poly-ferric chloride, bodied ferric sulfate.
7. municipal sludge processing method according to claim 4 or 5, it is characterised in that：The ferrous salt is sub- for sulfuric acid
At least one of iron, ferrous nitrate, frerrous chloride.
8. municipal sludge processing method according to claim 4 or 5, it is characterised in that：The activated carbon is step 2)
The active carbon particle of preparation.
9. municipal sludge processing method according to claim 1, it is characterised in that：Step 1) and 3) in press filtration operation pressure
Power is 0.3~0.8MPa, and time of filter pressing is 20~40min.
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| CN201711458466.6A CN108249735A (en) | 2017-12-28 | 2017-12-28 | A kind of municipal sludge processing method |
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| CN201711458466.6A CN108249735A (en) | 2017-12-28 | 2017-12-28 | A kind of municipal sludge processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389363A (en) * | 2020-04-02 | 2020-07-10 | 四川省地质矿产勘查开发局四0五地质队 | Magnetic biochar adsorbing material based on sulfate-reduced sludge and preparation method and application thereof |
| CN113651505A (en) * | 2021-08-23 | 2021-11-16 | 上海市政工程设计研究总院（集团）有限公司 | Multifunctional excess sludge tank and sludge treatment method thereof |
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| US4277342A (en) * | 1979-10-01 | 1981-07-07 | Cornell Research Foundation, Inc. | Combined biological-chemical detoxification of organics |
| CN101503269A (en) * | 2008-12-30 | 2009-08-12 | 南京农业大学 | Plug flow type bioleaching process and apparatus for sludge treatment |
| CN104818036A (en) * | 2015-04-30 | 2015-08-05 | 吴植仁 | Method for using self-produced sludge carbon to perform sewage treatment and sludge carbonizing system |
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN107200374A (en) * | 2017-05-17 | 2017-09-26 | 广州福之源环保科技有限公司 | It is a kind of to be used to handle the medicament that lithium battery produces waste water |
-
2017
- 2017-12-28 CN CN201711458466.6A patent/CN108249735A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277342A (en) * | 1979-10-01 | 1981-07-07 | Cornell Research Foundation, Inc. | Combined biological-chemical detoxification of organics |
| CN101503269A (en) * | 2008-12-30 | 2009-08-12 | 南京农业大学 | Plug flow type bioleaching process and apparatus for sludge treatment |
| CN104818036A (en) * | 2015-04-30 | 2015-08-05 | 吴植仁 | Method for using self-produced sludge carbon to perform sewage treatment and sludge carbonizing system |
| CN107200374A (en) * | 2017-05-17 | 2017-09-26 | 广州福之源环保科技有限公司 | It is a kind of to be used to handle the medicament that lithium battery produces waste water |
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389363A (en) * | 2020-04-02 | 2020-07-10 | 四川省地质矿产勘查开发局四0五地质队 | Magnetic biochar adsorbing material based on sulfate-reduced sludge and preparation method and application thereof |
| CN113651505A (en) * | 2021-08-23 | 2021-11-16 | 上海市政工程设计研究总院（集团）有限公司 | Multifunctional excess sludge tank and sludge treatment method thereof |
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Application publication date: 20180706 |