CN110316938A - A kind of reinforcement sludge method for concentration - Google Patents
A kind of reinforcement sludge method for concentration Download PDFInfo
- Publication number
- CN110316938A CN110316938A CN201810259430.3A CN201810259430A CN110316938A CN 110316938 A CN110316938 A CN 110316938A CN 201810259430 A CN201810259430 A CN 201810259430A CN 110316938 A CN110316938 A CN 110316938A
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- Prior art keywords
- concentration
- salt water
- sludge
- sludge method
- concentration according
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- 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
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
Invention provides a kind of method of simple, effective reinforcement sludge concentrated effect, generates in sludge to sewage treatment and salt water is added, and mixes, adds flocculant solution, is centrifuged or is squeezed after mixing again.It can achieve the purpose that minimizing after adding salt water with enhanced flocculation agent flocculating effect, reduce the load of dehydration in next step.The present invention plays the role of waste utilization using the effluent brine etc. in sewage desalination, and the sewage treatment plant for being more suitable for being equipped with desalting system uses, and meets national environmental protection situation demand.
Description
Background technique
Sludge is unavoidable problem in sewage disposal process, and sludge treatment generally comprises concentration and dehydration two early period
Point, reach the preliminary requirement of minimizing, then carries out landfill or burning disposal.
There are much patents about dehydration agent prescription about sludge dewatering, as provided a kind of use in patent CN101367597B
In the flocculant of sludge dewatering, it is made of aluminium polychloride and polyacrylamide；Patent CN101734839B provides a set of use
The treatment process that chitosan, polyacrylamide built-up flocculant are dehydrated sludge.These are both for the sludge after concentration
The scheme being further processed.
In terms of existing distribution, concentration for sludge focuses mostly on concentrator, to its flocculant use research
It is less.Patent CN104591522A provides a kind of sludge flocculation concentration technique comprising following steps: forming small wadding
Group: cationic flocculant is added into sludge to be processed and stirs, to neutralize the charge in the sludge, forms small floc sedimentation；
It is granulated precipitating: Flokal B is added into the sludge for being formed with small floc sedimentation, the floc sedimentation is made to grow up, form precipitating.Its
Organic polymer coargulator used is polyacrylamide, poly-aluminium, Polyferric Sulfate, poly- activated silica gel and its modifier, polyaluminum sulfate chlorination
Iron aluminium or polymerization Polyferric Sulfate silicon flocculation.
However, in actual use, only adding flocculant, the effect is unsatisfactory.For being produced by sewage disposal system
Raw sludge, by preliminary sedimentation, moisture content is 90% or more.Solid particles in sludge is hydrate, substantially
It is a kind of stable soliquid.Micelle has very strong Brownian movement, and when movement, the taring ion of diffusion layer is largely de-
From it is for electro kinetic potential (ζ-potential) that micelle surface, which generates residual charge,.Identical electrical property is allowed to mutually exclusive, is formed to stablize and be divided
Granular media system.Colloidal solid interferes the aggregation of particle, grows up, and keeps stable state.Obtain good concentrated effect, it is necessary to broken
Bad colloform texture.
Summary of the invention
To overcome the defect that flocculating effect is bad during current sludge condensation, the present invention provides a kind of simple, effective
The method of reinforcement sludge concentrated effect.
Technical scheme is as follows:
A kind of reinforcement sludge method for concentration, includes the following steps:
It is generated in sludge to sewage treatment and salt water is added, mixed, add flocculant solution, be centrifuged after mixing again
Or squeezing.
Sludge moisture content > 80%.
The salt water can use the salt water generated in sewage desalination, useless after salt water or evaporative crystallization are concentrated such as reverse osmosis membrane
Salt water or other abraum salts are prepared；By sewage disposal process comprehensive utilization of waste.
The brine salinity mass content be 3%~20%, preferably 4%~15%, further preferably 5%~
10%.
The salinity includes sodium sulphate and/or sodium nitrate, accounts for 80% or more of salinity total amount, preferably 90% or more, also
Including one of calcium chloride, magnesium sulfate, sodium chloride or a variety of, total content is not higher than 20%.
The salt water and sludge volume ratio are 0.2:1~3:1, preferably 0.4:1~2:1, further preferably 0.5:1~
1.5:1。
The present inventor has found in practice process, and the salt water based on sodium sulphate is mixed with sludge according to a certain percentage,
Flocculant flocculation is added, coagulated particles state can be significantly improved, improves concentration and separation effect.The addition of salt water can neutralize
Charge, destroys the colloidal nature of mud granule, and enhancing molecule collaboration promotes the optimization of component electron framework, promotes flocculating polymer
The flocculation of agent in conjunction with closer, utilizes concentration and separation so that coagulated particles size is bigger.Brine source used is extensive, valence
Lattice are cheap, can partially reuse.
Salt water needs to stir and evenly mix after being added, and mixing time is 5~60min, preferably 10~30min；The flocculant
For any one or a few in cationic polyacrylamide, chitosan, polyvinyl alcohol, preferably cationic polyacrylamide.
Flocculant solution concentration is 0.05~0.5%, preferably 0.1~0.5%.
The additional amount of flocculant is the 5%~100%, preferably 10%~80% of sludge solid content dry weight, further excellent
It is selected as 20%~60%.
It is added after flocculant using slow persistence stirring or batch type.1~60min of mixing time, from energy saving
Angle, preferably 3~45min, further preferably 5~30min.
Sleeping spiral shell centrifugal concentrating can be used in the sludge modulated.
The invention has the advantages that after addition salt water can with enhanced flocculation agent flocculating effect, according to sludge quality difference,
Reduce after concentration water content 2%~10% in sludge, according to different solid contents, reduce total Water about 10%~
40%, achieve the purpose that minimizing, reduces the load of dehydration in next step.The present invention is risen using the effluent brine etc. in sewage desalination
To the effect of waste utilization, the sewage treatment plant for being more suitable for being equipped with desalting system is used, and meets national environmental protection situation demand.
Detailed description of the invention
Fig. 1 is respectively state after comparative example 1, embodiment 1, the centrifugation of embodiment 2 from left to right.
Specific embodiment
Below by embodiment, the present invention is described in detail, so that the features and advantages of the present invention become apparent from.But it answers
This points out that the present invention is not limited only to embodiment listed herein.
Wherein sludge water content is measured using oven drying method, 105 DEG C of drying 6h of sample.
Comparative example 1
It takes 90.2% sludge sample 200ml of moisture content, the cationic polyacrylamide 8g of 0.2% concentration is added, 100rpm is stirred
Mix 15min, with 3000rpm (equivalent 1860g centrifugal force) 3min in centrifuge, pour out supernatant liquor, by lower layer's solid (i.e. from
Heart heavy phase) drying survey moisture content.
Comparative example 2
90.2% sludge sample 200ml of moisture content is taken, the dilution of 200ml water is added, 0.2% concentration is added after stirring 10min
Cationic polyacrylamide 10g, 100rpm stir 15min, and 3000rpm (equivalent 1860g centrifugal force) 3min is used in centrifuge,
Supernatant liquor is poured out, moisture content is surveyed into lower layer's solid (i.e. centrifugation heavy phase) drying.
Embodiment 1
90.2% sludge sample 200ml of moisture content is taken, the concentration of 5.2% concentration sewage desalting system reverse osmosis membrane of 100g is added
Salt water, stirs the chitosan 10g that 0.2% concentration is added after 10min, and 100rpm stirs 15min, 3000rpm is used in centrifuge
(equivalent 1860g centrifugal force) 3min, pours out supernatant liquor, and moisture content is surveyed in lower layer's solid (i.e. centrifugation heavy phase) drying.
Embodiment 2
90.2% sludge sample 200ml of moisture content is taken, the concentration of 5.2% concentration sewage desalting system reverse osmosis membrane of 200g is added
Salt water stirs the cationic polyacrylamide 20g that 0.1% concentration is added after 15min, and 150rpm stirs 10min, in centrifuge
With 3000rpm (equivalent 1860g centrifugal force) 5min, supernatant liquor is poured out, moisture content is surveyed into lower layer's solid (i.e. centrifugation heavy phase) drying.
Embodiment 3
90.2% sludge sample 200ml of moisture content is taken, the concentration of 11.3% concentration sewage desalting system reverse osmosis membrane of 200g is added
Salt water stirs the cationic polyacrylamide 15g that 0.3% concentration is added after 8min, and 100rpm stirs 20min, in centrifuge
With 3000rpm (equivalent 1860g centrifugal force) 4min, supernatant liquor is poured out, moisture content is surveyed into lower layer's solid (i.e. centrifugation heavy phase) drying.
Embodiment 4
90.2% sludge sample 200ml of moisture content is taken, the concentration of 10.5% concentration sewage desalting system reverse osmosis membrane of 200g is added
Salt water stirs the cationic polyacrylamide 20g that 0.2% concentration is added after 9min, and 100rpm stirs 60min, in centrifuge
With 3000rpm (equivalent 1860g centrifugal force) 3min, supernatant liquor is poured out, moisture content is surveyed into lower layer's solid (i.e. centrifugation heavy phase) drying.
Embodiment 5
90.2% sludge sample 200ml of moisture content is taken, the concentration of 9.2% concentration sewage desalting system reverse osmosis membrane of 200g is added
Salt water, stirs the polyvinyl alcohol 4g that 0.4% concentration is added after 10min, and 100rpm stirs 15min, 3000rpm is used in centrifuge
(equivalent 1860g centrifugal force) 3min, pours out supernatant liquor, and moisture content is surveyed in lower layer's solid (i.e. centrifugation heavy phase) drying.
Table 1
It is assumed that 100g is solid, water content is m, m=100/ (1- after comparative example 1 (salt water is not added and only adds flocculant) centrifugation
87.01%) -100；Water content is n after embodiment 1 is centrifuged, and n=100/ (1-83.15%) -100 is then reduced to 100%x (m-
n)/m。
By experimental data it is found that using addition saline methods can be with enhanced flocculation effect, reduction heavy phase water content, and from
Fig. 1 finds out that the light phase that the invention obtains more is clarified, less from the solid content of light phase overflow, more advantageous to subsequent sewage treatment.
Although the preferred embodiments of the invention, those skilled in the art has been disclosed in order to illustrate the present invention
Member can be the present invention it should be appreciated that in the case where not departing from present inventive concept defined by claims and range
Various modifications, addition and replacement out.
Claims (10)
1. a kind of reinforcement sludge method for concentration, which is characterized in that the method for concentration includes that salt water is added into sludge, is mixed,
Flocculant solution is added, is centrifuged or is squeezed after mixing again.
2. reinforcement sludge method for concentration according to claim 1, sludge moisture content > 80%.
3. reinforcement sludge method for concentration according to claim 1, the salt water includes the salt water generated in sewage desalination, excellent
Effluent brine after selecting reverse osmosis membrane concentration salt water or evaporative crystallization.
4. reinforcement sludge method for concentration according to claim 1, the brine salinity mass content is 3%~20%, excellent
It is selected as 4%~15%, further preferably 5%~10%.
5. reinforcement sludge method for concentration according to claim 4, the salinity include sodium sulphate and/or sodium nitrate, salt is accounted for
80% or more of point total amount, preferably 90% or more；Further include one of calcium chloride, magnesium sulfate, sodium chloride or a variety of, always contains
Amount is not higher than 20%.
6. reinforcement sludge method for concentration according to claim 1, the salt water and sludge volume ratio are 0.2:1~3:1, excellent
It is selected as 0.4:1~2:1, further preferably 0.5:1~1.5:1.
7. reinforcement sludge method for concentration according to claim 1, being stirred evenly after salt water is added, mixing time is 5~
60min, preferably 10~30min.
8. reinforcement sludge method for concentration according to claim 1, the flocculant is cationic polyacrylamide, shell is poly-
Any one or a few in sugar, polyvinyl alcohol, preferably cationic polyacrylamide.
9. reinforcement sludge method for concentration according to claim 1, flocculant solution concentration is 0.05~0.5%, preferably
0.1~0.5%；The additional amount of flocculant is the 5%~100%, preferably 10%~80% of sludge solid content dry weight, further
Preferably 20%~60%.
10. reinforcement sludge method for concentration according to claim 1 is added after flocculant using slow persistence stirring or interval
Formula stirring；Mixing time is 1~60min, preferably 3~45min, further preferably 5~30min.
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| CN201810259430.3A CN110316938A (en) | 2018-03-27 | 2018-03-27 | A kind of reinforcement sludge method for concentration |
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| CN201810259430.3A CN110316938A (en) | 2018-03-27 | 2018-03-27 | A kind of reinforcement sludge method for concentration |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007012086A1 (en) * | 2007-03-13 | 2008-09-18 | Reichmann-Schurr, geb. Wenzler, Margot | Process for treating excess sludge in a sewage treatment plant |
| US20130102503A1 (en) * | 2011-10-19 | 2013-04-25 | Aicardo Roa-Espinosa | Clarifying and stabilizing composition |
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| US20160052807A1 (en) * | 2007-04-20 | 2016-02-25 | Cytec Technology Corp. | Use of silicon-containing polymers to improve red mud flocculation in the bayer process |
| CN106145586A (en) * | 2016-08-02 | 2016-11-23 | 长兴瑷晟环保科技有限公司 | A kind of biological modified method of deeply dehydrating sludge |
| CN106865928A (en) * | 2017-03-21 | 2017-06-20 | 华侨大学 | A kind of method for sludge treatment of molysite magnesium salts flocculant compounding |
-
2018
- 2018-03-27 CN CN201810259430.3A patent/CN110316938A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007012086A1 (en) * | 2007-03-13 | 2008-09-18 | Reichmann-Schurr, geb. Wenzler, Margot | Process for treating excess sludge in a sewage treatment plant |
| US20160052807A1 (en) * | 2007-04-20 | 2016-02-25 | Cytec Technology Corp. | Use of silicon-containing polymers to improve red mud flocculation in the bayer process |
| US20130102503A1 (en) * | 2011-10-19 | 2013-04-25 | Aicardo Roa-Espinosa | Clarifying and stabilizing composition |
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| CN106145586A (en) * | 2016-08-02 | 2016-11-23 | 长兴瑷晟环保科技有限公司 | A kind of biological modified method of deeply dehydrating sludge |
| CN106865928A (en) * | 2017-03-21 | 2017-06-20 | 华侨大学 | A kind of method for sludge treatment of molysite magnesium salts flocculant compounding |
Non-Patent Citations (4)
| Title |
|---|
| 傅超美等编: "《药用辅料学》", 31 October 2008, 北京：中国中医药出版社 * |
| 张泾生等著: "《矿用药剂》", 30 November 2008, 北京：冶金工业出版社 * |
| 朱洪法: "《环境保护辞典》", 30 June 2009, 北京：金盾出版社 * |
| 苏会东等: "《水污染控制工程》", 31 May 2017, 北京：中国建材工业出版社 * |
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Address after: 201203 floor 4, building 5, No. 1690, Cailun Road, Shanghai pilot Free Trade Zone Applicant after: CATHAY R&D CENTER Co.,Ltd. Applicant after: CATHAY INDUSTRIAL BIOTECH Ltd. Applicant after: CATHAY (JINXIANG) BIOMATERIAL Co.,Ltd. Address before: 200120 Shanghai Zhangjiang High Tech Park of Pudong New Area Cailun Road No. 5 No. 1690 Applicant before: CATHAY R&D CENTER Co.,Ltd. Applicant before: CATHAY INDUSTRIAL BIOTECH Ltd. Applicant before: CATHAY (JINXIANG) BIOMATERIAL Co.,Ltd. |
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Effective date of registration: 20191030 Address after: 201203 floor 4, building 5, No. 1690, Cailun Road, Shanghai pilot Free Trade Zone Applicant after: CATHAY R&D CENTER Co.,Ltd. Applicant after: CIBT USA Applicant after: CATHAY (JINXIANG) BIOMATERIAL Co.,Ltd. Address before: 201203 floor 4, building 5, No. 1690, Cailun Road, Shanghai pilot Free Trade Zone Applicant before: CATHAY R&D CENTER Co.,Ltd. Applicant before: CATHAY INDUSTRIAL BIOTECH Ltd. Applicant before: CATHAY (JINXIANG) BIOMATERIAL Co.,Ltd. |