CN107226602A - A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching - Google Patents
A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching Download PDFInfo
- Publication number
- CN107226602A CN107226602A CN201710429923.2A CN201710429923A CN107226602A CN 107226602 A CN107226602 A CN 107226602A CN 201710429923 A CN201710429923 A CN 201710429923A CN 107226602 A CN107226602 A CN 107226602A
- Authority
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- China
- Prior art keywords
- sludge
- bioleaching
- anaerobic digestion
- anaerobic
- mechanical dehydration
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- 239000010802 sludge Substances 0.000 title claims abstract description 89
- 230000029087 digestion Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000018044 dehydration Effects 0.000 claims abstract description 24
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 5
- 239000012895 dilution Substances 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 235000016709 nutrition Nutrition 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 210000002249 digestive system Anatomy 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 abstract description 7
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C02F11/04—Anaerobic treatment; Production of methane by such processes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to sewage treatment area, a kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching are especially disclosed.The technical solution adopted by the present invention is：A kind of method for anaerobic sludge digestion based on bioleaching, bioleaching pond, for carrying out bioleaching processing to sludge；Mechanical dehydration machine, is connected with the bioleaching pond, for the sludge after bioleaching processing in step one to be carried out into mechanical dehydration, pressing filtering liquid discharge in mechanical dehydration machine；Anaerobic digester system, for carrying out Anaerobic Digestion to sludge.The present invention have can significantly reduce Heavy Metal Level In Sludge, improve organic matter degradation rate and shorten anaerobic digestion time the characteristics of.
Description
Technical field
The present invention relates to sewage treatment area, a kind of sludge anaerobic digestion system based on bioleaching is especially disclosed
And method for sludge treatment.
Background technology
Anaerobic digestion is a kind of important sludge treatment technique, and it acts on organic in degraded sludge by anaerobe
Thing, and biogas is reclaimed, realize the recycling treatment of sludge.Anaerobic digestion can be roughly divided into hydrolysis acidification, production acetic acid, methane phase three
In the individual stage, because the composition in sludge is extremely complex, anaerobic digestion is directly carried out, efficiency is typically relatively low, therefore through frequently with water
The mode of heat treatment is pre-processed, the eucaryotic cell structure in destruction sludge, improves anaerobic digestion efficiency.Industrial sludge and part city
Substantial amounts of heavy metal can be contained in political affairs sludge, heavy metal has obvious influence on anaerobic digestion, during excessive concentration, can significantly pressed down
The activity of anaerobic digestion flora processed, reduces treatment effect.Conventional hydrothermal pretreatment can only destroy eucaryotic cell structure at present, to sludge
In heavy metal there is no removal effect.
The content of the invention
The present invention overcome the shortcomings of prior art exist there is provided it is a kind of can significantly reduce Heavy Metal Level In Sludge,
Improve organic matter degradation rate and shorten the sludge anaerobic digestion system based on bioleaching of anaerobic digestion time.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of sludge based on bioleaching is detested
Oxygen digestive system, including：Bioleaching pond, for carrying out bioleaching processing to sludge；
Mechanical dehydration machine, is connected with the bioleaching pond, for the sludge after bioleaching processing in step one to be existed
Mechanical dehydration, pressing filtering liquid discharge are carried out in mechanical dehydration machine；
Anaerobic digester system, for carrying out Anaerobic Digestion to sludge.
Further, a kind of sludge anaerobic digestion system based on bioleaching, the anaerobic digester system includes two-stage
Digester.Single-stage anaerobic digestor can also be used according to actual needs, and digestion temperature can be high temperature or middle temperature.
Using a kind of method for sludge treatment of described sludge anaerobic digestion system based on bioleaching, comprise the following steps：
Step 1: bioleaching；Sludge after concentration enters bioleaching pond, and adds a small amount of reducible sulfur iron thereto
As nutritional substrate, dosage is the 0.3 ~ 3% of sludge butt, and is aerated, and handles 12 ~ 50h；
Step 2: mechanical dehydration, mechanical dehydration is carried out using belt type dewaterer；According to actual needs dewaterer can also use from
Heart dewaterer, folded spiral shell dewaterer, frame dehydration machine;
Step 3: anaerobic digestion, using two-stage anaerobic digestion technique, sludge initially enters first order anaerobic digestor, keeps stirring
Mix, handle 14 ~ 21d, subsequently into second level anaerobic digestor, discharged after 4 ~ 8d of stewing process.
Further, method for sludge treatment, also includes step 4 between the step one and step 2：By 10 ~ 50% warp
The sludge reflux of step one processing is crossed to bioleaching pond entrance.
Further, method for sludge treatment, further comprising the steps of five between the step 2 and step 3：Pressing filtering liquid is arranged
Go out, add quick lime and remove the heavy metal precipitation in filtrate.According to actual needs, the medicament added is it is also an option that ripe stone
One or more in ash, sodium acid carbonate, sodium hydroxide.
Further, method for sludge treatment, further comprising the steps of six between the step 2 and step 3：After dehydration
Sludge is diluted using reclaimed water, dilution sludge to solid content 3 ~ 8%.Thinned water can use the sewage after grid is handled
Factory's water inlet, running water, anaerobic digestion supernatant, the one or more gone in the sludge dewatering filtrate after removing heavy metals.
The present invention has following beneficial effect compared with prior art：
Compared with existing anaerobic digester system, after bioleaching pretreatment in technical scheme, Cu in sludge,
The heavy metal concentrations such as Zn decline more than 60%, Fe2+It is fully converted to Fe3+；Anaerobic digestion time shortens, and can be contracted by general 28d
25d is as short as, anaerobic digester system stability is obviously improved, and the adaptability to separate sources sludge is significantly improved.
Brief description of the drawings
Fig. 1 is a kind of sludge anaerobic digestion system structural representation based on bioleaching.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail, and is implemented below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
It is a kind of sludge anaerobic system based on bioleaching as shown in Figure 1, including：Bioleaching pond 1, for sludge
Carry out bioleaching processing；Mechanical dehydration machine 2, is connected with bioleaching pond 1, is handled for that will pass through bioleaching in step one
Sludge afterwards carries out mechanical dehydration, pressing filtering liquid discharge in mechanical dehydration machine；Anaerobic digester system 3, for detesting sludge
Oxygen digestion process, anaerobic digester system 3 includes two-stage digester.In the present embodiment, the municipal sludge after concentration（Solid content
3.12%, the content of organic matter 54%, Cu content 284mg/kg butts, the mg/kg butts of Zn contents 1358, the mg/kg of Cr contents 336 is done
Base）Into bioleaching pond, reducible sulfur iron is added thereto（Elemental sulfur, ferrous sulfate etc.）Deng as nutritional substrate, add
Measure as the 1% of sludge butt, and be aerated, after processing 48h, sludge pH is down to 2.2；
Sludge after bioleaching is handled carries out mechanical dehydration in belt type dewaterer, and dehydrated sludge solid content reaches
18%, Cu, Zn, Cr clearance in sludge respectively reach 63%, 82% and 29%；Quick lime is added into the pressing filtering liquid of discharge, will
Heavy metal precipitation in filtrate is removed.Reclaimed water after sludge after dehydration is handled using sewage plant is diluted, and dilutes solid content
To 5%, subsequently into anaerobic digestion；
Sludge after dilution enters anaerobic digester system, and using two-stage mesophilic anaerobic digestion technique, sludge initially enters the first order
Anaerobic digestor, is kept stirring for, and handles 18d, subsequently into second level anaerobic digestor, is discharged after stewing process 7d.Organic matter
Degradation rate reaches 60%.In contrast to this, undressed thickened sludge, one-level anaerobic digestion needs 21d, and secondary anaerobic digestion is needed
7d is wanted, organic matter degradation rate is 50% or so.
Using a kind of method for sludge treatment of the sludge anaerobic digestion system based on bioleaching, comprise the following steps：
Step 1: bioleaching；Sludge after concentration enters bioleaching pond, and adds a small amount of reducible sulfur iron thereto
As nutritional substrate, dosage is the 1% of sludge butt, and is aerated, and handles 48h；
Step 2: mechanical dehydration, mechanical dehydration is carried out using belt type dewaterer；
Step 3: anaerobic digestion, using two-stage anaerobic digestion technique, sludge initially enters first order anaerobic digestor, keeps stirring
Mix, handle 20d, subsequently into second level anaerobic digestor, discharged after stewing process 5d.
Further, method for sludge treatment, also includes step 4 between the step one and step 2：By 20% process
The sludge reflux of step one processing is to bioleaching pond entrance.
Further, method for sludge treatment, method for sludge treatment also includes following step between the step 2 and step 3
Rapid five：Pressing filtering liquid is discharged, and is added quick lime and is removed the heavy metal precipitation in filtrate.
Further, method for sludge treatment, method for sludge treatment also includes following step between the step 2 and step 3
Rapid six：Sludge after dehydration is diluted using reclaimed water, dilution sludge to solid content 8%；
Sludge after dilution enters anaerobic digester system, and using two-stage mesophilic anaerobic digestion technique, sludge initially enters the first order
Anaerobic digestor, is kept stirring for, and handles 18d, subsequently into second level anaerobic digestor, is discharged after stewing process 7d；Organic matter
Degradation rate reaches 60%；In contrast to this, undressed thickened sludge, one-level anaerobic digestion needs 21d, and secondary anaerobic digestion is needed
7d is wanted, organic matter degradation rate is 50%.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or equivalent substitution, all essences in the present invention are carried out to which part technical characteristic
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (6)
1. a kind of sludge anaerobic digestion system based on bioleaching, it is characterised in that including：Bioleaching pond（1）, for pair
Sludge carries out bioleaching processing；
Mechanical dehydration machine（2）, with the bioleaching pond（1）Connection, for by after bioleaching processing in step one
Sludge carries out mechanical dehydration, pressing filtering liquid discharge in mechanical dehydration machine；
Anaerobic digester system（3）, for carrying out Anaerobic Digestion to sludge.
2. a kind of sludge anaerobic digestion system based on bioleaching as claimed in claim 1, it is characterised in that：The anaerobism
Digestive system（3）Including two-stage digester.
3. a kind of method for sludge treatment of sludge anaerobic digestion system based on bioleaching described in claim 2 is used, its
It is characterised by, comprises the following steps：
Step 1: bioleaching；Sludge after concentration enters bioleaching pond, and adds a small amount of reducible sulfur iron thereto
As nutritional substrate, dosage is the 0.3 ~ 3% of sludge butt, and is aerated, and handles 12 ~ 50h；
Step 2: mechanical dehydration, mechanical dehydration is carried out using belt type dewaterer；
Step 3: anaerobic digestion, using two-stage anaerobic digestion technique, sludge initially enters first order anaerobic digestor, keeps stirring
Mix, handle 14 ~ 21d, subsequently into second level anaerobic digestor, discharged after 4 ~ 8d of stewing process.
4. method for sludge treatment as claimed in claim 3, it is characterised in that also include step between the step one and step 2
Rapid four：By the sludge reflux of 10 ~ 50% process step one processing to bioleaching pond entrance.
5. method for sludge treatment as claimed in claim 3, it is characterised in that also include between the step 2 and step 3 with
Lower step 5：Pressing filtering liquid is discharged, and is added quick lime and is removed the heavy metal precipitation in filtrate.
6. method for sludge treatment as claimed in claim 3, it is characterised in that also include between the step 2 and step 3 with
Lower step 6：Sludge after dehydration is diluted using reclaimed water, dilution sludge to solid content 3 ~ 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710429923.2A CN107226602A (en) | 2017-06-09 | 2017-06-09 | A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710429923.2A CN107226602A (en) | 2017-06-09 | 2017-06-09 | A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching |
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| Publication Number | Publication Date |
|---|---|
| CN107226602A true CN107226602A (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710429923.2A Pending CN107226602A (en) | 2017-06-09 | 2017-06-09 | A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410183A (en) * | 2020-03-05 | 2020-07-14 | 华南农业大学 | Sludge biochar and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153307A1 (en) * | 1999-08-03 | 2002-10-24 | Institut National De La Recherche Scientifique | Hybrid chemical and biological process for decontaminating sludge from municipal sewage |
| CN101041595A (en) * | 2007-03-05 | 2007-09-26 | 同济大学 | Method for producing agriculture fertilizer by sludge in water treatment plant |
| CN101948231A (en) * | 2010-10-14 | 2011-01-19 | 北京科技大学 | High-concentration anaerobic sludge digestion treatment process for carrying out mechanical dewatering on sludge |
| CN102173546A (en) * | 2011-01-18 | 2011-09-07 | 清华大学 | System and method for generating methane and synchronously removing heavy metal from heavy metal-containing organic solid wastes |
| CN103906712A (en) * | 2011-10-27 | 2014-07-02 | 威立雅环境服务公司 | Method for upgrading waste and corresponding device |
| CN104478184A (en) * | 2014-11-28 | 2015-04-01 | 新疆天物科技发展有限公司 | Clean utilization method for municipal sludge |
-
2017
- 2017-06-09 CN CN201710429923.2A patent/CN107226602A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153307A1 (en) * | 1999-08-03 | 2002-10-24 | Institut National De La Recherche Scientifique | Hybrid chemical and biological process for decontaminating sludge from municipal sewage |
| CN101041595A (en) * | 2007-03-05 | 2007-09-26 | 同济大学 | Method for producing agriculture fertilizer by sludge in water treatment plant |
| CN101948231A (en) * | 2010-10-14 | 2011-01-19 | 北京科技大学 | High-concentration anaerobic sludge digestion treatment process for carrying out mechanical dewatering on sludge |
| CN102173546A (en) * | 2011-01-18 | 2011-09-07 | 清华大学 | System and method for generating methane and synchronously removing heavy metal from heavy metal-containing organic solid wastes |
| CN103906712A (en) * | 2011-10-27 | 2014-07-02 | 威立雅环境服务公司 | Method for upgrading waste and corresponding device |
| CN104478184A (en) * | 2014-11-28 | 2015-04-01 | 新疆天物科技发展有限公司 | Clean utilization method for municipal sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410183A (en) * | 2020-03-05 | 2020-07-14 | 华南农业大学 | Sludge biochar and preparation method and application thereof |
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Application publication date: 20171003 |