CN108423880A - Pre-treating process for sewage - Google Patents
Pre-treating process for sewage Download PDFInfo
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- CN108423880A CN108423880A CN201810427665.9A CN201810427665A CN108423880A CN 108423880 A CN108423880 A CN 108423880A CN 201810427665 A CN201810427665 A CN 201810427665A CN 108423880 A CN108423880 A CN 108423880A
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- Prior art keywords
- sewage
- treating process
- filtering
- secondary filter
- primary
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to pre-treating process for sewage.The pre-treating process for sewage is included in after inorganic flocculant is added in the sewage of flowing and is once filtered, and carrying out secondary filter after organic flocculant is added in primary filtered sewage obtains pretreated sewage.Pre-treating process for sewage of the present invention can effectively solve the problems, such as that existing sewage disinfection treatment floor space is wide, while improve the pretreating effect of sewage, effectively reduce COD total amounts, BOD total amounts and SS total amounts in sewage, and the use of strainer is unaffected.
Description
Technical field
The present invention relates to pre-treating process for sewage.
Background technology
Traditional sewage disinfection treatment is typically using by the way of standing or increase biofermentation etc. promotes the sundries in sewage
It is precipitated in the form of precipitation, to be removed it by filtration step；But traditional sewerage pretreatment method is not only time-consuming longer,
Simultaneously because need to stand, the horizontal area usually stood expands, and accelerates its precipitation process, cause its floor space compared with
It is wide.
Existing sewage purification needs to pre-process sewage compared with frequently with membrane treatment process before film process, in advance
The purpose of processing is will to be converted to the impurity of precipitation to filter removal with Impure forms, then reach purification using membrane technology
Purpose.The requirement for the film that can be applied to sewage purification at present is not high, main reason is that, sewage is adopted in pretreatment stage
After the conventional mode for standing filtering, its COD total amount is still higher in obtained pretreated sewage, usually in 150mg/L
More than, it is just high in the film of sewage of 150mg/L or more quality itself to handle COD total amounts, and clean-up effect often reaches not
To ideal effect, the usual higher film of clean-up effect requires in particular value COD total amounts, BOD total amounts and SS total amounts in sewage
Hereinafter, such as MBR films film.
In addition, existing using by the way that flocculant is added, the rear mode for intercepting precipitation is applied to the sewage disinfection treatment of flowing, should
Mode can preferably solve the problems, such as that sewage disinfection treatment floor space is larger.But it finds in actual application, though which
Right floor space is smaller, but its precipitation filter effect is not satisfactory, often during drainage flow, short time Inner filter net
It being easy to block, the effect of sewage disinfection treatment is affected, and particular requirement value is not achieved in COD total amounts, BOD total amounts and SS total amounts,
It is larger to the limitation of follow-up used purification membrane.
Invention content
By the discovery that studies for a long period of time of the present inventor, after flocculant is added in sewage the reason of easily causing filter net jam mainly exist
After flocculant addition, generated precipitation viscosity is larger, and shatter value is relatively low, causes the aperture of strainer to be easily blocked, especially
Such as in the case of adding inorganic flocculant and organic flocculant before filtration, no matter its sequencing.
The present invention provides a kind of pre-treating process for sewage, and it is wide can effectively to solve existing sewage disinfection treatment floor space
Problem, while the pretreating effect of sewage is improved, effectively reduce COD total amounts, BOD total amounts and SS total amounts in sewage, strainer
Use it is unaffected.
In order to solve the above technical problems, the technical solution of present invention offer first aspect, i.e., a kind of pre-treating process for sewage,
It is included in after inorganic flocculant is added in the sewage of flowing and is once filtered, it is organic through being added in primary filtered sewage
Secondary filter is carried out after class flocculant obtains pretreated sewage.
Preferably, it is added before inorganic flocculant, the flow velocity of sewage is 1.1m/s~2m/s；It once filters and secondary
When filtering, the flow velocity of sewage is 1.9mm/s~3.5mm/s.
Preferably, sewage flows up after primary filtering, and once sewage flows downward when filtering.
Preferably, it is to push propeller rotational by the sewage of flowing that sewage, which flows downward, when primary filtering, is rotated simultaneously
The anti-sewage that pushes away of propeller flow downward realization；The rotating speed of propeller is 35~64r/min, the folder of propeller and vertical direction
Angle is 30 ° -60 °.
Preferably, propeller is provided with hairbrush close to one end of secondary filter.
Preferably, inorganic flocculant is aluminium polychloride, and organic flocculant is polyacrylamide.
Preferably, the addition of inorganic flocculant is 120mg/L, and the addition of organic flocculant is 2mg/L.
Preferably, the aperture of filter screen once filtered is 100-150 μm, and the aperture of filter screen of secondary filter is 50-100 μm.
Preferably, firstly flow through electric field region through primary filtered sewage, add after organic flocculant carry out it is secondary
Pretreated sewage is obtained by filtration.
Preferably, sewage flows up after primary filtering, and once sewage flows downward when filtering.
Preferably, decanting zone and electric field region are flowed successively through through primary filtered sewage, adds organic flocculant
Secondary filter is carried out afterwards obtains pretreated sewage.
Preferably, the height of electric field region is the 80%-100% of the height of decanting zone.
The application pre-treating process for sewage is added different flocculants using Flowing Sewage, intercepted step by step step by step
The mode of filter carries out sewage disinfection treatment, due to being to change flocculant feed postition, time on the basis of existing sewage disinfection treatment
And post-processing step, it still can effectively solve the problems, such as that existing sewage disinfection treatment floor space is wide；Simultaneously because different waddings
The feed postition of solidifying agent is different, and precipitating viscosity reduces, even if a large amount of precipitations of generation or sewage disinfection treatment time are longer,
Still shatter value is higher after being assembled due to precipitation itself, and porosity is larger, therefore it influences to reduce on the blocking of strainer, to have
Effect improves the pretreating effect of sewage, effectively reduces COD total amounts, BOD total amounts and SS total amounts in sewage.
Description of the drawings
Fig. 1 is the schematic diagram for the polluted water pretreatment apparatus that the application pre-treating process for sewage may be used.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with embodiment of the present invention
In attached drawing, the technical solution in embodiment of the present invention is clearly and completely described, it is clear that described embodiment party
Formula is only some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without making creative work, belongs to the present invention
The range of protection.In the absence of conflict, the feature in the embodiment and embodiment in the present invention can be mutually arbitrary
Combination.
It is the pretreated sewage handled using pre-treating process for sewage described herein, items ginseng below
Number can be learnt after testing.
Embodiment one
1) inorganic flocculant is added in the sewage that flowing velocity is m1m/s, such as is carried out after aluminium polychloride primary
The addition of filtering, inorganic flocculant is that n1mg/L (is reference with sewage volume, is i.e. needs that inorganic wadding is added in every liter of sewage
The quality of solidifying agent)；
2) through addition organic flocculant in primary filtered sewage, such as secondary filter is carried out after polyacrylamide and is obtained
To pretreated sewage；The addition of organic flocculant is that n2mg/L (is reference with sewage volume, is i.e. needs to add in every liter of sewage
Enter the quality of organic flocculant), when primary filtering and secondary filter, the flow velocity of sewage is m2mm/s.
In above-mentioned steps, the flowing of sewage whole process same direction, for example (,) lateral flow, the strainer of primary filtering and secondary filter
It is preferably flowed to perpendicular to sewage, the aperture of filter screen once filtered is l1 μm, and the aperture of filter screen of secondary filter is l2 μm.
It is each according to the pretreated sewage that above-mentioned pre-treating process for sewage and the following table 1 items step parameter obtain
Item testing result such as the following table 2, such as：Pretreatment in COD total amounts L1mg/L, BOD total amount L2mg/L, SS total amount L3mg/L, 30min
Sewage volume V m3, the strainer that once filters after 30min pretreating sewages and precipitation thereon pore area summation and place
Before reason after ratio (after processing/processing before) D1,30min pretreating sewage of the pore area of strainer the strainer of secondary filter and its
On precipitation pore area summation and the pore area of strainer before processing ratio (after processing/processing before) D2.
Table 1
| Embodiment | m1 | n1 | n2 | m2 | l1 | l2 |
| 1 | 1.1 | 120 | 2 | 3.5 | 100 | 50 |
| 2 | 2 | 120 | 2 | 3.0 | 150 | 100 |
| 3 | 1.3 | 120 | 2 | 2.5 | 115 | 60 |
| 4 | 1.8 | 120 | 2 | 2.2 | 135 | 90 |
| 5 | 1.5 | 120 | 2 | 1.9 | 120 | 75 |
Table 2
Embodiment two
1) inorganic flocculant is added in the sewage that flowing velocity is m1m/s, such as is carried out after aluminium polychloride primary
The addition of filtering, inorganic flocculant is that n1mg/L (is reference with sewage volume, is i.e. needs that inorganic wadding is added in every liter of sewage
The quality of solidifying agent)；
2) decanting zone and electric field region are flowed successively through through primary filtered sewage, adds organic flocculant, such as
Secondary filter is carried out after polyacrylamide obtains pretreated sewage；The addition of organic flocculant is n2mg/L (with sewage
Volume is reference, i.e. the quality that organic flocculant is added is needed in every liter of sewage), when primary filtering and secondary filter, sewage
Flow velocity be m2mm/s.
In above-mentioned steps, before primary filtering, the sewage of flowing pushes propeller rotational, while rotational speed is R rad/s
The anti-sewage that pushes away of propeller flow downward, promote the sewage in primary filtering to flow downward, and after primary filtering sewage to
Upper flowing can be intercepted by simple physics and be can be realized, and the angle of propeller and vertical direction is α °, and propeller is close to two
One end of secondary filtering is provided with hairbrush；Hairbrush carry out rotary motion, can preferably by the precipitation on the strainer of secondary filter into
One step is broken up, its porosity is increased.The strainer of primary filtering and secondary filter is preferably flowed to perpendicular to sewage, is once filtered
Aperture of filter screen is l1 μm, and the aperture of filter screen of secondary filter is l2 μm.The height of electric field region is the d% of the height of decanting zone.
It is each according to the pretreated sewage that above-mentioned pre-treating process for sewage and the following table 3 items step parameter obtain
Item testing result such as the following table 4, such as：Pretreatment in COD total amounts L1mg/L, BOD total amount L2mg/L, SS total amount L3mg/L, 30min
Sewage volume V m3, the strainer that once filters after 30min pretreating sewages and precipitation thereon pore area summation and place
Before reason after ratio (after processing/processing before) D1,30min pretreating sewage of the pore area of strainer the strainer of secondary filter and its
On precipitation pore area summation and the pore area of strainer before processing ratio (after processing/processing before) D2.
Table 3
Table 4
Polluted water pretreatment apparatus shown in FIG. 1 may be used to be pre-processed to sewage in the above embodiment two, and Fig. 1 is
The schematic diagram for the polluted water pretreatment apparatus that the application pre-treating process for sewage may be used.As shown in Figure 1, sewage shown in FIG. 1
Pre-processing device includes medicine storage 1, conveyance conduit 8, filter；It sets gradually in the filter and once filters from bottom to up
Strainer 3, conduit entrance 9, propeller 10, electrode field 6, hairbrush 11, the strainer 7 of secondary filter, filter outlet 12；
Wherein, conduit entrance 9 is connect with conveyance conduit 8, to convey sewage；Before sewage enters filter, medicine storage 1
Inorganic flocculant, such as aluminium polychloride, i.e. PAC is added in the sewage of flowing into conveyance conduit 8；
3 lower section of strainer once filtered is provided with filler 2, with preferably filter sewage；3 aperture of strainer once filtered is excellent
Choosing is 100-150 μm；
Propeller 10 is helical blade 4, the folder of helical blade 4 and vertical direction close to one end of the strainer 3 once filtered
Angle is α °, and preferably α is 30 ° -60 °；
Propeller 10 is hairbrush 11 close to one end of the strainer 7 of secondary filter；
Electrode field 6, i.e. electric field region, electric field region and one are provided in filter between helical blade 4 and hairbrush 11
It is provided with decanting zone 5 in filter between the strainer 3 of secondary filtering；After electric field region, sewage of the medicine storage 1 into filter
Input organic flocculant, such as polyacrylamide, i.e. PAM；
The outlet 12 of filter is arranged in the rear end of the strainer 7 of secondary filter, and the aperture of the strainer 7 of secondary filter is excellent
Choosing is 50-100 μm.
It can be obtained from above table data, in embodiment one, sewage disinfection treatment effect obtained by embodiment 3-5 is more
It is good, and embodiment two is similar；In addition, embodiment two is better relative to one gained sewage disinfection treatment of embodiment.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
Protection scope of the present invention is also should be regarded as into retouching.
Claims (10)
1. pre-treating process for sewage, which is characterized in that be included in the sewage of flowing after inorganic flocculant is added and carry out once
Filtering, progress secondary filter obtains pretreated sewage after organic flocculant is added in primary filtered sewage.
2. pre-treating process for sewage according to claim 1, it is characterised in that：It is added before inorganic flocculant, sewage
Flow velocity be 1.1m/s~2m/s；When primary filtering and secondary filter, the flow velocity of sewage is 1.9mm/s~3.5mm/s.
3. pre-treating process for sewage according to claim 1, it is characterised in that：Sewage flows up after primary filtering, and one
Sewage flows downward when secondary filtering.
4. pre-treating process for sewage according to claim 3, it is characterised in that：It is logical that sewage, which flows downward, when primary filtering
The sewage for crossing flowing pushes propeller rotational, while the anti-sewage that pushes away of the propeller rotated flows downward realization；Propeller turns
Speed is 35~64r/min, and the helical blade of propeller and the angle of vertical direction are 30 ° -60 °.
5. pre-treating process for sewage according to claim 4, it is characterised in that：Propeller is set close to one end of secondary filter
It is equipped with hairbrush.
6. pre-treating process for sewage according to claim 1, it is characterised in that：The aperture of filter screen once filtered is 100-
150 μm, the aperture of filter screen of secondary filter is 50-100 μm.
7. pre-treating process for sewage according to claim 1, it is characterised in that：Electricity is firstly flowed through through primary filtered sewage
Field areas, progress secondary filter obtains pretreated sewage after adding organic flocculant.
8. pre-treating process for sewage according to claim 7, it is characterised in that：Sewage flows up after primary filtering, and one
Sewage flows downward when secondary filtering.
9. pre-treating process for sewage according to claim 8, it is characterised in that：It is flowed successively through through primary filtered sewage
Decanting zone and electric field region, progress secondary filter obtains pretreated sewage after adding organic flocculant.
10. pre-treating process for sewage according to claim 9, it is characterised in that：The height of electric field region is decanting zone
The 80%-100% of height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810427665.9A CN108423880B (en) | 2018-05-07 | 2018-05-07 | Sewage pretreatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810427665.9A CN108423880B (en) | 2018-05-07 | 2018-05-07 | Sewage pretreatment process |
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| Publication Number | Publication Date |
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| CN108423880A true CN108423880A (en) | 2018-08-21 |
| CN108423880B CN108423880B (en) | 2020-08-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992548A (en) * | 2012-12-06 | 2013-03-27 | 山东名科环保工程有限公司 | Method for treating low-temperature slaughter wastewater |
| CN102992533A (en) * | 2011-09-16 | 2013-03-27 | 常熟科勒有限公司 | Paint wastewater treatment system |
| CN203360172U (en) * | 2013-06-21 | 2013-12-25 | 浙江海洋学院 | Biological treatment device for sewage generated during livestock breeding |
| US20150197434A1 (en) * | 2014-01-14 | 2015-07-16 | Buckman Laboratories International, Inc. | Use Of Celluloses In Water Treatment |
| KR101628281B1 (en) * | 2015-07-10 | 2016-06-22 | (주)우광하이텍 | System for waste water trust management |
-
2018
- 2018-05-07 CN CN201810427665.9A patent/CN108423880B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992533A (en) * | 2011-09-16 | 2013-03-27 | 常熟科勒有限公司 | Paint wastewater treatment system |
| CN102992548A (en) * | 2012-12-06 | 2013-03-27 | 山东名科环保工程有限公司 | Method for treating low-temperature slaughter wastewater |
| CN203360172U (en) * | 2013-06-21 | 2013-12-25 | 浙江海洋学院 | Biological treatment device for sewage generated during livestock breeding |
| US20150197434A1 (en) * | 2014-01-14 | 2015-07-16 | Buckman Laboratories International, Inc. | Use Of Celluloses In Water Treatment |
| KR101628281B1 (en) * | 2015-07-10 | 2016-06-22 | (주)우광하이텍 | System for waste water trust management |
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| CN108423880B (en) | 2020-08-11 |
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