CN107324556A - A kind of breeding wastewater pretreating process - Google Patents
A kind of breeding wastewater pretreating process Download PDFInfo
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- CN107324556A CN107324556A CN201710666999.7A CN201710666999A CN107324556A CN 107324556 A CN107324556 A CN 107324556A CN 201710666999 A CN201710666999 A CN 201710666999A CN 107324556 A CN107324556 A CN 107324556A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000001488 breeding Effects 0.000 title claims abstract description 38
- 238000005189 flocculation Methods 0.000 claims abstract description 39
- 230000016615 flocculation Effects 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 230000000570 adjustive Effects 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 210000003608 Feces Anatomy 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 239000010794 food waste Substances 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims abstract description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- -1 excrement Substances 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L Iron(II) sulfate Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 11
- 239000011574 phosphorus Substances 0.000 abstract description 11
- 239000010865 sewage Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000010802 sludge Substances 0.000 abstract description 3
- 230000001105 regulatory Effects 0.000 abstract 1
- 244000144972 livestock Species 0.000 description 8
- 238000011068 load Methods 0.000 description 6
- 244000144977 poultry Species 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 241000276438 Gadus morhua Species 0.000 description 3
- 229920002521 Macromolecule Polymers 0.000 description 3
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 235000019516 cod Nutrition 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000037250 Clearance Effects 0.000 description 2
- 230000035512 clearance Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 230000001954 sterilising Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 241000256113 Culicidae Species 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 229940088597 Hormone Drugs 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 210000004681 Ovum Anatomy 0.000 description 1
- 241000282898 Sus scrofa Species 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 244000052616 bacterial pathogens Species 0.000 description 1
- 230000003115 biocidal Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000249 desinfective Effects 0.000 description 1
- 201000009910 diseases by infectious agent Diseases 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003311 flocculating Effects 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 244000045947 parasites Species 0.000 description 1
- 230000003071 parasitic Effects 0.000 description 1
- 230000001717 pathogenic Effects 0.000 description 1
- 244000052769 pathogens Species 0.000 description 1
- 230000001376 precipitating Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- 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
- C02F1/001—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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
-
- 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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- 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
Abstract
The present patent application belongs to the processing technology field of water, waste water, sewage or sludge, breeding wastewater pretreating process, including following process：A) separating dry space from moist space process：Breeding wastewater is sequentially passed through into preliminary sedimentation tank, first stage precipitation tank, coarse rack, fine fack and carries out preliminary separation of solid and liquid, the solid suspensions such as the excrement in breeding wastewater, food-residue and various excretas are subjected to preliminary sedimentation and isolation；B) precipitation regulation process：The water outlet of separating dry space from moist space process is passed through sedimentary adjustive pool, precipitated again so that residence time of the breeding wastewater in regulating reservoir is more than 3 days；C) electric flocculation process：Upper strata waste water in step b) in sedimentary adjustive pool is delivered to electric flocculation device with certain flow velocity, then water outlet is passed through in air supporting sedimentation basin and carries out separation of solid and liquid again, water outlet is further processed into rear process.The present invention can reduce phosphorus content, and can improve subsequent biochemical treatment effect.
Description
Technical field
The invention belongs to the processing technology field of water, waste water, sewage or sludge.
Background technology
In terms of China's livestock and poultry cultivation, either family's distributing or large-scale cultivation, in the processing of the excretas such as excrement
Upper major part is all to use flush-type technique.Flush-type technics comparing is convenient and swift, but shortcoming is also obvious：1st, can be poultry
Poultry manure, food-residue and other excretas etc. are flushed in waste water together, therefore contain substantial amounts of solid in breeding wastewater
Suspension, solid-liquid mixes viscosity and easily causes treatment facility line clogging greatly；2nd, excrement slag and residue can increase waste water CODcr it is dense
Degree, CODcr is at concentrations up to 5000~20000mg/L in livestock breeding wastewater after tested, and BOD5 concentration reaches 2000~8000mg/
L, NH3-N concentration can reach more than 700mg/L, SS at concentrations up to 5000~10000mg/L, with organic concentration it is high,
The characteristics of NH3-N concentration is high, SS concentration is high, causes post-processing difficulty big, such as uses biochemical treatment, it will make system operation
Organic loading is increased, and the economic input of sewage treatment facility is increased, floor space is big, operation operation is complicated；3rd, in feces of livestock and poultry
Containing substantial amounts of pathogenic microorganism, parasitic ovum and the mosquitos and flies multiplied, it can increase cause of disease species in environment, pathogen occur
With parasite amount reproduction, spreading for people, animal infectious disease is caused；3rd, with livestock and poultry breeding industry scale, intensive development,
The need for diseases prevention and promoting growth of animals or poultry, culturist is largely using antibiotic, hormone, metal trace element etc., medicament residue
The excretas such as the excrement with livestock and poultry are emitted, and these are difficult to be degraded directly using biochemical treatment in residue,
If discharged in environment, it will cause serious pollution to environment.
To solve the above problems, patent document a kind of " method of aquaculture sewage disposal（ZL201410414699.6）" public
A kind of processing method has been opened, following steps are specifically included：（1）Pretreatment：First sewage is removed the gred, acidifying is then hydrolyzed and adjusts
Section, makes the non-solubility organic matter in waste water be changed into dissolved organic matter；（2）Biochemical treatment：Pretreated sewage is first
By upflow anaerobic sludge blanket reactor UASB processing, then in turn through one-level A/O processing systems, intermediate sedimentation pond, two
Level A/O processing systems carry out corresponding biochemical treatment；（3）Dephosphorization and sterilization：Sewage after biochemical treatment is sequentially passed through again and removed
Phosphorus, flocculation treatment, remove sediment, and supernatant liquid flows into final deposition pool again, further remove precipitation, and supernatant liquid flows into pH and returned again
Pond is adjusted, it is 6~9 to make liquid pH value；Then sterilization processing is carried out, you can qualified discharge.
Pre-treatment step is removed the gred in the above method, solves the problem of solid-liquid is mixed, and has carried out water acidifying, is improved
Sewage can life-stylize, but during actual use, also have a disadvantage that：1st, breeding wastewater is to belong to typical C/N and C/P is inclined
It is required for carbon source on low waste water, existing denitrification dephosphorization technique, it is bad that carbon source deficiency will result in phosphor-removing effect, in this method
Dephosphorization is not carried out in pretreatment process, the carbon source after biological treatment in waste water can be reduced again, so so that into removing
When phosphorus is with disinfecting steps, carbon source content is just lower, causes final phosphor-removing effect not good, and the waste water phosphorus content after discharge is still very
Height, can cause body eutrophication, cause serious problem of environmental pollution and break Environmental Ecological Balance；2nd, in pretreating process
Slagging-off and water acidifying can not remove macromolecular substances, cause waste water still to contain substantial amounts of macromolecular substances, and macromolecular complex
Matter can not be made full use of by the anaerobe in biochemical treatment step, cause the effect of biochemical treatment process not good.
The content of the invention
Phosphorus content is reduced the invention discloses one kind, and the pretreatment of the breeding wastewater of subsequent biochemical treatment effect can be improved
Technique.
The solution of the present invention content is：Breeding wastewater pretreating process, including following process：
A) separating dry space from moist space process；
Breeding wastewater is sequentially passed through into preliminary sedimentation tank, first stage precipitation tank, coarse rack, fine fack and carries out preliminary separation of solid and liquid, is rested
Grow the solid suspensions such as excrement, food-residue and various excretas in waste water and carry out preliminary sedimentation and isolation；
B) precipitation regulation process；
The water outlet of separating dry space from moist space process is passed through sedimentary adjustive pool, precipitated again so that breeding wastewater is in sedimentary adjustive pool
The interior residence time is more than 3 days；
C) electric flocculation process；
Upper strata waste water in step b) in sedimentary adjustive pool is delivered to electric flocculation device, water outlet is then passed through air supporting sedimentation basin
Separation of solid and liquid is inside carried out again, and water outlet is further processed into rear process.
Beneficial effect：Cause breeding wastewater separation of solid and liquid by precipitating and filtering in step a), make consolidating in breeding wastewater
Body suspension removes more than 90% under the process conditions；Step b) effect is on the one hand the solid of part bulky grain is suspended
Thing natural sedimentation again, the operating load that process is handled after reduction；On the other hand the organic loading of breeding wastewater is adjusted, makes waste water
In insoluble COD materials and nitrogen-containing compound removed substantially, and can remove part solubility COD and nitrogen-containing compound,
Not only substantially reduce the load in rear process processing, and the biodegradability of waste water can also be greatly improved, make after wastewater treatment
Process is more stablized；The extremely strong high activity flocculation group of generation adsorptivity, on the one hand makes the non-solubility in waste water in step c)
An organic matter part is able to air supporting and flocculation sediment, and another part non-solubility organic matter is converted into small molecule, pole by macromolecular
The big biodegradability for improving waste water, on the other hand, by the offer of external electric charge, makes the class of protein present in waste water etc. one
Electrically charged, nitrogenous organic matter reaches charge neutrality, is removed in the presence of air supporting and flocculation, reduces organic nitrogen in waste water
Content, greatly improve the removal efficiency of ammonia nitrogen, finally, electrolysis can also cause phosphorus containg substances in waste water big
Amount is removed, and show that the highest clearance of phosphorus can reach more than 98% by experiment.
To sum up, the breeding wastewater after pretreating process of the present invention, on the one hand will make livestock breeding wastewater by solid
CODcr declines at least 50% or so again in water outlet after liquid separation, and making the organic loading of rear process at least reduces by 50%, greatly carries
The high treatment effect of subsequent handling；On the other hand by reducing phosphorus content in advance, the phosphor-removing effect of finishing operations is improved, and
The content of macromolecular substances is reduced, the effect of subsequent biological treatment can be improved, finally makes livestock breeding wastewater in pretreatment
Effluent quality is more stablized.
Further, electric flocculation treatment process in the process of running, continuously adds flocculant at waste water inlet, in waste water
Outlet continuously adds flocculation aid, to promote the treatment effect of electric flocculation process, reduces out water sedimentation disengaging time.
Further, in step c), deliver in control waste water flow velocity during flocculant, flocculant flow velocity and sedimentary adjustive pool
The flow rate of upper strata waste water is 1:500~1:1000, to play the treatment effect of electric flocculation process to greatest extent, reduce it
Energy consumption；Flocculant is entered electric flocculation device after being sufficiently mixed with waste water, to improve the treatment effect of electric flocculation, and promote flocculation
Agent gives full play to effect.
Further, in step c), control flocculation aid and waste water flow velocity are 1 during dispensing flocculation aid:500~1:1000,
The treatment effect of electric flocculation improves more than 10%.
Further, in step c) control waste water in 1~2min of electric flocculation device residence time, electrode plate current density 2~
8mA/cm2, livestock breeding wastewater CODcr in the water outlet after separation of solid and liquid will be made to decline at least 50% or so again, after making
The organic loading of process at least reduces by 50%, and the highest clearance of phosphorus can reach more than 98% during final exclusion waste water.
Further, the flocculant refers to aluminium polychloride or polyaluminium sulfate or ferrous sulfate being configured to mass concentration
10%~20% solution, flocculating effect is optimal.
Further, the flocculation aid is the PAM solution that mass concentration is 0.1%~0.2%, and empirical tests PAM solution helps solidifying
Effect is preferable.
Embodiment
Below by embodiment, the present invention is further detailed explanation.
Embodiment
Breeding wastewater pretreating process, including following process：
1. separating dry space from moist space process
Breeding wastewater is sequentially passed through into preliminary sedimentation tank, first stage precipitation tank, coarse rack, fine fack and carries out preliminary separation of solid and liquid, is rested
Grow the solid suspensions such as excrement, food-residue and various excretas in waste water and carry out preliminary sedimentation and isolation, make breeding wastewater
In solid suspension more than 90% is removed under the process conditions；The process separation of solid and liquid can be using filtering, press filtration, centrifugation etc.
Various physics and chemical flocculation and replace.
2. precipitation regulation process
Upper strata breeding wastewater Jing Guo preliminary separation of solid and liquid is passed through sedimentary adjustive pool, precipitated again, it is ensured that breeding wastewater
Residence time in sedimentary adjustive pool is more than 3 days.The residence time can determine according to specific water quality situation；
3. electric flocculation process
Upper strata waste water in sedimentary adjustive pool is delivered to the electric flocculation device equipped with battery lead plate.During electric flocculation, in electricity
Flocculation plant water inlet is continuously passed through in the polyaluminium chloride solution of mass concentration 10%, launch process and controlled in certain proportion
Waste water flow velocity：The flow rate of polyaluminium chloride solution flow velocity and upper strata waste water in sedimentary adjustive pool is 1:600, make polyaluminium chloride molten
Liquid enters electric flocculation device after being sufficiently mixed with waste water.Waste water is controlled in electric flocculation device residence time 1min, battery lead plate electric current
2~8mA/cm of density2。
The PAM solution that mass concentration is 0.1% is passed through in electric flocculation device delivery port, PAM solution flow rates are controlled：Waste water stream
Speed is 1:600.PAM solution can play Coagulation aiding during air supporting and flocculation sediment.
Electric flocculation device water outlet continuously enters the air supporting sedimentation basin of electric flocculation process, and stop is delivered to next for 4~8 hours again
Individual biochemical treatment process.After testing, the COD in electric flocculation process in waste water be 1500~below 2000mg/L, ammonia nitrogen be 500~
800mg/L, total phosphorus are 10~30mg/L.Waste water is sent into subsequent handling again.
Experimental design：The waste water for choosing certain pig breeding farm is handled, and is walked using the pretreatment disclosed in background technology
Method is as processing one, pretreating process of the present invention as processing two, and the result after processing is as follows：
Test result indicates that：Compared to traditional preprocess method, by the breeding wastewater that handles of the present invention, CODcr concentration can
It is reduced to 1500~2000mg/L, ammonia-nitrogen content can be reduced to 500~800mg/L, suspension content can be reduced to 50~
400mg/L, total phosphorus content is reduced to 10~30mg/L.After breeding wastewater is by pretreatment process of the present invention, waste water is greatly improved
Biodegradability, process is more stablized.
Claims (7)
1. breeding wastewater pretreating process, it is characterised in that including following process：
A) separating dry space from moist space process；
Breeding wastewater is sequentially passed through into preliminary sedimentation tank, first stage precipitation tank, coarse rack, fine fack and carries out preliminary separation of solid and liquid, is rested
Grow the solid suspensions such as excrement, food-residue and various excretas in waste water and carry out preliminary sedimentation and isolation；
B) precipitation regulation process；
The water outlet of separating dry space from moist space process is passed through sedimentary adjustive pool, precipitated again, it is ensured that breeding wastewater is in sedimentary adjustive pool
The interior residence time is more than 3 days；
C) electric flocculation process；
Upper strata waste water in step b) in sedimentary adjustive pool is delivered to electric flocculation device, water outlet is then passed through air supporting sedimentation basin
Separation of solid and liquid is inside carried out again, and water outlet is further processed into rear process.
2. breeding wastewater pretreating process according to claim 1, it is characterised in that：Electric flocculation treatment process was being run
Cheng Zhong, continuously adds flocculant at waste water inlet, and flocculation aid is continuously added in the outlet of waste water.
3. breeding wastewater pretreating process according to claim 2, it is characterised in that：In step c), flocculant mistake is delivered
The flow rate that upper strata waste water in waste water flow velocity, flocculant flow velocity and sedimentary adjustive pool is controlled in journey is 1:500~1:1000.
4. breeding wastewater pretreating process according to claim 3, it is characterised in that：In step c), flocculation aid mistake is delivered
Control flocculation aid with waste water flow velocity 1 in journey:500~1:1000.
5. breeding wastewater pretreating process according to claim 4, it is characterised in that：Control waste water is wadded a quilt with cotton in electricity in step c)
Solidifying 1~2min of device residence time, 2~8mA/cm2 of electrode plate current density.
6. breeding wastewater pretreating process according to claim 5, it is characterised in that：The flocculant refers to that chlorine will be polymerize
Change aluminium or polyaluminium sulfate or ferrous sulfate is configured to the solution of mass concentration 10%~20%.
7. breeding wastewater pretreating process according to claim 6, it is characterised in that：The flocculation aid is that mass concentration is
0.1%~0.2% PAM solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710666999.7A CN107324556A (en) | 2017-08-07 | 2017-08-07 | A kind of breeding wastewater pretreating process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710666999.7A CN107324556A (en) | 2017-08-07 | 2017-08-07 | A kind of breeding wastewater pretreating process |
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| CN107324556A true CN107324556A (en) | 2017-11-07 |
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| CN201710666999.7A Pending CN107324556A (en) | 2017-08-07 | 2017-08-07 | A kind of breeding wastewater pretreating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113371943A (en) * | 2021-06-29 | 2021-09-10 | 成都飞创科技有限公司 | Method for treating wastewater of farm |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204022605U (en) * | 2014-08-12 | 2014-12-17 | 毛斌全 | A kind of EPN livestock and poultry cultivation blowdown treatment system |
| CN105541003A (en) * | 2015-12-11 | 2016-05-04 | 青岛清科环保科技有限公司 | Method for treating aquaculture wastewater |
-
2017
- 2017-08-07 CN CN201710666999.7A patent/CN107324556A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204022605U (en) * | 2014-08-12 | 2014-12-17 | 毛斌全 | A kind of EPN livestock and poultry cultivation blowdown treatment system |
| CN105541003A (en) * | 2015-12-11 | 2016-05-04 | 青岛清科环保科技有限公司 | Method for treating aquaculture wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113371943A (en) * | 2021-06-29 | 2021-09-10 | 成都飞创科技有限公司 | Method for treating wastewater of farm |
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Application publication date: 20171107 |