CN109179910A - A kind of domestic sewage treatment process - Google Patents
A kind of domestic sewage treatment process Download PDFInfo
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- CN109179910A CN109179910A CN201811284102.5A CN201811284102A CN109179910A CN 109179910 A CN109179910 A CN 109179910A CN 201811284102 A CN201811284102 A CN 201811284102A CN 109179910 A CN109179910 A CN 109179910A
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- water
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- 239000010865 sewage Substances 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000008569 process Effects 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 36
- 230000003750 conditioning effect Effects 0.000 claims abstract description 30
- 239000010802 sludge Substances 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000001954 sterilising effect Effects 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 239000010453 quartz Substances 0.000 claims abstract description 13
- 238000004062 sedimentation Methods 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000006004 Quartz sand Substances 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 238000007667 floating Methods 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000006228 supernatant Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000645 desinfectant Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 claims 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
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- 230000005611 electricity Effects 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000011045 prefiltration Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 241000589651 Zoogloea Species 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
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- 238000011010 flushing procedure Methods 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention provides a kind of domestic sewage treatment process, comprising the following steps: (1) pre-processes: sanitary sewage is after artificial grid prefiltration from inflow conditioning tank；(2) biochemical treatment: the sewage adjusted through conditioning tank is sequentially sent to anaerobic pond, anoxic pond and aerobic tank by sewage pump and carries out biochemical treatment；(3) precipitation process: the sewage through biochemical treatment enters sedimentation in secondary sedimentation tank processing, and flow to intermediate pool certainly；(4) filtration treatment: the sewage in intermediate pool is sequentially sent to quartz filter by middle water pump and active carbon filter is filtered；(5) disinfect: filtered water outlet enters sterilization pool and carries out disinfection processing, and the sewage indices after disinfection treatment reach standard.The characteristics of precipitating sludge a part in the present invention is back to anaerobic pond, sewage disposal system is made to have both contact oxidation method and activated sludge；It is filtered using quartz sand and active carbon filter, it is ensured that turbidity, stink equal size are up to standard, good purification.
Description
Technical field
The present invention relates to sanitary sewage disposal technical field more particularly to a kind of domestic sewage treatment process.
Background technique
As modernization development is accelerated, the sewage of city production and life production is also increasing year by year, and especially life is dirty
Water, because pollution sources are more, discharge amount is big, the problem of causing urban sewage pipe load heavier, frequently encounter long-pending silting plug.In order to anti-
Only pollute, protect environment, it is necessary to sewage is handled, at present sanitary sewage mainly from lavatory flushing water, kitchen water,
Washing machine drainage, shower drainage and other drainings etc..Contain cellulose, starch, carbohydrate, fat, protein etc. in sanitary sewage
Organic species, also often containing the pathogenic bacteria such as pathogen, virus, also containing nitrogen, phosphorus, chloride, sulfate, bicarbonate and
The inorganic salts such as sodium, potassium, calcium, magnesium.Wherein organic pollutant and phosphorus destroy environment water pollution maximum, and sanitary sewage can produce
Raw a large amount of foul smell, this will affect the health and ecological environment of people.
The processing method of existing sanitary sewage is mainly include the following types: 1, unpowered anaerobism project treatment mode: in topography
The flat village for having certain drop is seen, by the buried large-scale purifying biogas generating pit of unified construction, full village's sanitary sewage is passed through pipe
Network grille well collection in road is flowed in methane-generating pit, and unpowered anaerobism engineering implementation is taken to be uniformly processed；The shortcomings that this method
It is: the limitation based on anaerobism effect, for the sanitary sewage of high concentration, i.e., at sewage of the COD value between 3000~30000
Manage effect clearly, and for low concentration sewage, i.e. sewage treating efficiency of the COD value between 100~300 compares
Low, it is up to standard that single processing mode is difficult effluent quality.2, the aerobic project treatment mode of microkinetic: to the family gently polluted in village
Front yard industry or sewage of farm take microkinetic Aerobic Process for Treatment mode, i.e., mating on the basis of unpowered anaerobism project treatment to do
Power is aerated measure；The shortcomings that this method is: for rural area or cell low concentration sewage, i.e., COD value is 100~300
Between sewage, clearly, the effluent quality after taking power to be aerated can reach discharge standard to biochemical treatment effect, but dynamic
Power consumption is usually larger.3, Miniature biomass pool tupe: village that is more complex for topography, being not easy unified laying sewage conduct
The village, tupe, especially disperses agriculture residence with carrying out more family joint construction biogas, and single household installation glass reinforced plastic sanitary sewage is taken to detest
Oxygen clarifier carries out sewage treatment；The shortcomings that this tupe, is: only utilize country sewage, and output
Biogas is not only seldom, and biogas output does not play substantive improvement with the energy for life in the countryside, and maintenance workload is big.4, wet
Ground processing and plant absorbing process mode: in conjunction with the above a certain mode treated sanitary sewage, match in conditional place
Set uses wetland variation or plant absorbing process, to reach better treatment effect；The shortcomings that this tupe, is: wetland or
Plant absorption construction achievees the purpose that further to absorb degradation water pollutant, this side after certain above tupe
Although method successfully solves the below standard emission problem of energy consumption, water quality, wetland occupied area is larger, and construction cost is higher.
Summary of the invention
The purpose of the present invention is to provide a kind of water conservation, high treating effect, meet discharge standard, the degree of automation compared with
High, convenient operation and management domestic sewage treatment process.
To achieve the above object, the present invention the following technical schemes are provided:
A kind of domestic sewage treatment process, includes the following steps:
(1) pre-process: sanitary sewage pass through artificial grid primary filtration, go water removal in biggish suspended matter, floating material and
The solids such as ribbon guarantee the stable operation of aftertreatment device, enter to adjust through the pretreated sewage self-flowing of artificial grid
Pond is sufficiently adjusted water, the water quality of sewage by conditioning tank, caused by buffering unevenly changes because of water quality and quantity to treatment process system
Load impact；
(2) biochemical treatment: sewage after conditioning tank is adjusted by sewage pump be sequentially sent to anaerobic pond, anoxic pond and
Aerobic tank carries out biochemical treatment；
(3) precipitation process: the sewage handled through aerobic tank enters sedimentation in secondary sedimentation tank processing, after precipitation and separation, supernatant
From intermediate pool is flow to, water flow is adjusted, precipitating sludge a part in the secondary settling tank passes back into the anaerobic pond, and one
Divide and is sent by air-lift device to sludge-tank；
(4) filtration treatment: the sewage in intermediate pool is sequentially sent to quartz filter and active carbon by middle water pump
Filter is filtered processing, it is ensured that delivery turbidity, stink and content of organics are up to standard, and the filtrate of the quartz filter is
Quartz sand, the filtrate of the active carbon filter are active carbons；
(5) disinfect: filtered water outlet enters sterilization pool and carries out disinfection processing, and the sewage items after disinfection treatment refer to
Mark reaches standard, and the water after disinfection carries out discharge or the source water as backwash.
In the present invention, the technical solution further limited are as follows:
Further, it is equipped with catch pit, ladder in conditioning tank described in step (1), is convenient for the sewage lifting pump work
And maintenance；Air stirrer and floating ball lever meter are additionally provided in the conditioning tank, the air stirrer implementation is periodically stirred
It mixes, drains the sediment in the conditioning tank in time, the floating ball lever meter is controlled by water level height in the conditioning tank
The switch of the sewage pump is made, i.e. height opens low stop.
Further, the water part of aerobic tank described in step (2) is back to anoxic pond, and passes through nitrification liquid reflux pump
Realize reflux.
Further, it is aerated and is supplied oxygen by blower in anoxic pond described in step (2)；There is nitrification in the aerobic tank
Bacterium, and be aerated and supplied oxygen by blower.
Further, semi-soft composite filling is filled in the aerobic tank, and the nitrifier apposition growth is in described
On semi-soft composite filling, the material of the semi-soft composite filling is polypropylene (PP).
Further, the concentration of dissolved oxygen is maintained at 0.5mg/l hereinafter, dissolved oxygen in the aerobic tank in the anoxic pond
Concentration be maintained at 1.0mg/l or more.
Further, secondary settling tank described in step (3) uses vertical sedimentation basin, sets center water conservancy diversion in the secondary settling tank
Cylinder；Aeration stirring system is set in the sludge-tank, and the supernatant after sludge settling concentration is back to the conditioning tank and carries out again
Processing, sludge make periodically suction outward transport disposition.
Further, sewage is sterilized in the sterilization pool by chlorine system disinfectant in step (5)；Connect in the sterilization pool
It is connected to disinfection chemicals dosing plant, is equipped with metering pump and blender in the disinfection chemicals dosing plant.
Further, the sewage treatment process further includes recoil pump, and described recoil pump one end is connect with the sterilization pool,
One end is connect with the quartz filter and active carbon filter.
Further, the sewage treatment process further includes pipe valve and electric control system；The pipe valve includes pipe
Road, valve, pipe fitting and installation attachment, the electric control system are controlled using PLC programmable host；The electric control system
With the sewage pump, air stirrer, floating ball lever meter, blower, disinfection chemicals dosing plant, middle water pump, recoil pump, nitre
Change the connection of liquid reflux pump electric wire.
Technical solution of the present invention has the advantages that compared with conventional art
1, the present invention is provided with conditioning tank and intermediate pool, and the addition of conditioning tank can sufficiently adjust the water and water of sewage
Matter guarantees the continuous and stable operation of aftertreatment systems；Intermediate pool is as reservoir, for adjusting water flow, after guarantee
The stable operation of continuous filter.
2, the present invention combines the characteristic of sanitary sewage, carries out biochemical treatment by the way of anaerobism, anoxic and aerobic combination,
Most of organic matter is capable of handling in sewage, dephosphorization, efficiencies of nitrogen removal are good, and the semi-soft composite filling of PP is selected in aerobic tank,
It has the characteristics that large specific surface area, easy to be filmed, be not easy to plug, porosity is big, long service life.
3, the present invention use secondary settling tank partial sludge reflux technique so that the biochemical treatment process of sewage have both oxidizing process and
The characteristics of activated sludge process.
4, the backwash draining of sludge-tank supernatant and quartz filter and active carbon filter of the invention is back to tune
Section pond is handled again, achievees the purpose that water conservation.
5, aeration stirring system is set in sludge-tank of the invention, aerobic nitrification is carried out to sludge, greatly reduces sludge
Yield.
6, the PLC electric controller that the present invention is arranged is operated using automatically controlling, mitigates the labor intensity of operator,
The automatization level of the flexibility of raising system, operability, entire sewage treatment process is higher, and energy consumption is effectively reduced.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target and other advantages of the invention can be wanted by following specification and right
Book is sought to be achieved and obtained.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art, can also be according to these under the premise of not making the creative labor power
Attached drawing obtains other attached drawings, in which:
Fig. 1 is a kind of process flow chart of a preferred embodiment of sewage treatment process of the invention.
In Fig. 1: 1. artificial grids；2. conditioning tank；3. anaerobic pond；4. anoxic pond；5. aerobic tank；6. secondary settling tank；Among 7.
Pond；8. quartz filter；9. active carbon filter；10. sterilization pool；11. sewage pump；12. gas device；In 13.
Between water pump；14. nitrification liquid reflux pump；15. blower；16. sludge-tank；17. sterilizing chemicals dosing plant；18. recoil pump.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to the accompanying drawing to preferable reality of the invention
It applies example and is further elaborated explanation.It should be understood that the specific embodiments described herein are merely to illustrate reconciliation
The present invention is released, is not intended to restrict the invention.
Embodiment 1
As shown in Figure 1, being designed primarily to 30 tons of sewage treatment the invention discloses a kind of domestic sewage treatment process
Amount, meanwhile, technological design automatically controls operation using PLC, mitigates the labor intensity of staff, improves labor efficiency, and improves
The management level of Sewage Disposal；When design, the operation characteristic of water, the mechanical periodicity of water quality and system and device is considered,
To improve flexibility, the operability of system, using partial sludge reflux nitre solution technique, to reduce sludge yield；Using backwash
Draining and the reflux of sludge-tank concentrated supernatant are handled again, play the purpose of water conservation.
The influent quality of domestic sewage treatment process disclosed by the invention and using the present invention treated effluent quality
See Table 1 for details:
Table 1: influent quality and effluent quality situation
Combination processing requires and goal of the invention, water quality characteristic of the present invention according to sewage, effluent quality index that treated
SS. you, ammonia nitrogen etc. reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) level-one emission standard A.
A kind of domestic sewage treatment process of the invention, comprising the following steps:
(1) pre-process: sanitary sewage pass through artificial 1 primary filtration of grid, go water removal in biggish suspended matter, floating material and
The solids such as ribbon guarantee the stable operation of aftertreatment device, enter to adjust through the pretreated sewage self-flowing of artificial grid 1
Pond 2, water, the water quality of sewage are sufficiently adjusted by conditioning tank 2, and buffering makes treatment process system because water quality and quantity unevenly changes
At load impact；
(2) biochemical treatment: the sewage after the adjusting of conditioning tank 2 is sequentially sent to anaerobic pond 3, anoxic by sewage pump 11
Pond 4 and aerobic tank 5 carry out biochemical treatment；
(3) precipitation process: the sewage handled through aerobic tank 5 enters 6 precipitation process of secondary settling tank, after precipitation and separation, supernatant
Liquid adjusts water flow from intermediate pool 7 is flow to, and precipitating sludge a part in the secondary settling tank 6 passes back into the anaerobic pond
3, a part is sent by air-lift device 12 to sludge-tank 16；
(4) filtration treatment: the sewage in intermediate pool 7 is sequentially sent to quartz filter 8 by middle water pump 13 and lives
Property carbon filter 9 is filtered processing, it is ensured that delivery turbidity, stink and content of organics are up to standard, the quartz filter 8
Filtrate is quartz sand, and the filtrate of the active carbon filter 9 is active carbon；
(5) disinfect: filtered water outlet enters sterilization pool 10 and carries out disinfection processing, the sewage items after disinfection treatment
Index reaches standard, and the water after disinfection carries out discharge or the source water as backwash.
Preferably, catch pit, ladder are equipped in above scheme in conditioning tank 2 described in step (1), is mentioned convenient for the sewage
Rise 11 work of pump and maintenance；Air stirrer and floating ball lever meter, the air stirrer are additionally provided in the conditioning tank 2
Periodic agitation is carried out, drains the sediment in the conditioning tank in time, the floating ball lever meter passes through in the conditioning tank 2
Water level height controls the switch of the sewage pump 11, i.e., height open it is low stop, sewage pump 11 stops working when low water level, high
Sewage pump 11 opens work when water level.The sewage pump 11, air stirrer, floating ball lever meter and PLC are electrical
The connection of control system electric wire, realizes and automatically controls.
Preferably, the water part of aerobic tank 5 described in step (2) is back to anoxic pond 4, and passes through nitrification liquid reflux pump
14 realize reflux；Pass through the aeration oxygen supply of blower 15 in the anoxic pond 4；There is nitrifier in the aerobic tank 5, and pass through blower
15 aeration oxygen supplys.The nitrification liquid reflux pump 14, blower 15 are connect with PLC electric control system electric wire, are realized and are automatically controlled, institute
Stating sewage pump 11 and blower 15 can realize within the set time and be used alternatingly automatically.In addition, working as entire process system equipment
It stops working 10 hours or more, blower 15 can timing intermittent duty.
Specifically, sanitary sewage is intercepted by artificial grid 1, the suspended matter of 5mm or more in water removal, floating material and band-like are removed
The solid matters such as object, gravity flow enter conditioning tank 2. wherein, the present embodiment setting conditioning tank 2 purpose be adjust sewage water quality and
Water pre-processes sewage, it is therefore an objective to which the preliminary content for reducing inorganic particle substance in sewage improves the homogeneity of sewage
And biodegradability, guarantee the continuous and stable operation of subsequent biochemical sewage treatment device.Conditioning tank 2 water outlet by sewage pump 11 according to
Secondary feeding anaerobic pond 3, anoxic pond 4 and aerobic tank 5 carry out biochemical treatment.In anaerobic pond 3, sewage fills in pond with returned sludge
Divide mixing, the bacteriums release phosphorus of a large amount of tool phosphoric acid of accumulation, phosphorus is absorbed under subsequent aerobic condition, is finally existed under anaerobic
Phosphorus is shifted under anoxia condition, reaches phosphor-removing effect.In anoxic pond 4, microorganism is in anaerobic condition, they are in sewage
Organic matter is carbon source, completes denitrification denitrogenation；On the other hand, under anoxic conditions, hydrolysis acidification occurs for organic pollutants,
Wherein macromolecular, organic pollutant difficult to degrade are changed into small molecule, degradable pollutant, created for subsequent aerobic reaction
Good condition.The processing of aerobic tank 5 is completed by autotrophic type nitrifier, is aerated using blower 15, is aerated by the film of aerobic tank 5
Pipeline and menbrane aerator, while it being equipped with semi-soft composite filling, it decomposes organic matter and generates carbon dioxide and water；Part is nitrogenous to be had
Machine object decomposes the carbon dioxide in the carbon dioxide or air generated as nutrient source using organic matter, is being attached to semi-soft group
Under the action of the different kind organism flora for closing filler, is reacted through each step, be oxidized to nitrate nitrogen.Wherein, dissolved oxygen in anoxic pond 4
Concentration be maintained at 0.5mg/l hereinafter, the concentration of dissolved oxygen is maintained at 1.0mg/l or more in aerobic tank 5.The water outlet of aerobic tank 5 one
It is partly refluxed to anoxic pond 4 and carries out interior circulation, to reach denitrifying purpose, another part enters secondary settling tank 6 and is precipitated, into
Row is separated by solid-liquid separation.Secondary settling tank 6 mainly meets the sedimentation of the biomembrane that falls off flowed out with water, dissociate zoogloea, organic impurities etc., reaches
To satisfied effect of settling, it avoids dead angle using reasonable surface loading, sinking speed, sludge bucket inclination angle is designed, and shortens dirty
Mud residence time in pond guarantees clarifying effect.6 inner part sludge of secondary settling tank is back to anaerobic pond 3 by air-lift device 12, remains
Remaining sludge is periodically siphoned away outward transport by sludge pump after concentrated, stable into sludge-tank 16.The water outlet of secondary settling tank 6 is adjusted out through intermediate pool 7
Quartz filter 8 is sequentially sent to by middle water pump 13 after water and active carbon filter 9 is filtered processing.It is discharged after filtering
It carries out disinfection processing into sterilization pool 10, it is ensured that the indices of sewage after processing are up to standard.
Preferably, semi-soft composite filling is filled in the present embodiment in aerobic tank 5, and nitrifier apposition growth is in described
On semi-soft composite filling, the material of the semi-soft composite filling is polypropylene (PP).
Preferably, secondary settling tank 6 uses vertical sedimentation basin in the present embodiment, inside sets central draft tube；It is set in sludge-tank 16
Aeration stirring system is set, the supernatant after sludge settling concentration is back to conditioning tank 2 and is reprocessed.
Preferably, sewage is sterilized in sterilization pool 10 by chlorine system disinfectant in the present embodiment；It is connected in sterilization pool 10
Chemicals dosing plant 17 is sterilized, is equipped with metering pump and blender in the disinfection chemicals dosing plant 17, sterilizes chemicals dosing plant 17 by electric-controlled
System control processed.Wherein, to ensure that the water quality handled can reach requirement, the disinfection time of contact in sterilization pool 10 is at least
0.5h。
Preferably, sewage treatment process further includes recoil pump 18 in the present embodiment, described 18 one end of recoil pump and sterilization pool
10 connections, one end is connect with quartz filter 8 and active carbon filter 9.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not used to the limit value present invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of domestic sewage treatment process, which comprises the steps of:
(1) pre-process: sanitary sewage passes through artificial grid primary filtration, removes biggish suspended matter, floating material and band-like in water removal
The solids such as object guarantee the stable operation of aftertreatment device, enter conditioning tank through the pretreated sewage self-flowing of artificial grid, by
Conditioning tank sufficiently adjusts water, the water quality of sewage, and buffering is born caused by unevenly changing because of water quality and quantity treatment process system
Lotus impact；
(2) biochemical treatment: sewage after conditioning tank is adjusted is sequentially sent to anaerobic pond, anoxic pond and aerobic by sewage pump
Pond carries out biochemical treatment；
(3) precipitation process: the sewage handled through aerobic tank enters sedimentation in secondary sedimentation tank processing, after precipitation and separation, supernatant gravity flow
To intermediate pool, water flow is adjusted, precipitating sludge a part in the secondary settling tank passes back into the anaerobic pond, and a part is logical
Air-lift device is crossed to send to sludge-tank；
(4) filtration treatment: the sewage in intermediate pool is sequentially sent to quartz filter by middle water pump and active carbon filters
Device is filtered processing, it is ensured that delivery turbidity, stink and content of organics are up to standard, and the filtrate of the quartz filter is quartz
Sand, the filtrate of the active carbon filter are active carbons；
(5) disinfect: filtered water outlet enters sterilization pool and carries out disinfection processing, and the sewage indices after disinfection treatment reach
To standard, the water after disinfection carries out discharge or the source water as backwash.
2. a kind of domestic sewage treatment process according to claim 1, which is characterized in that conditioning tank described in step (1)
It is interior to be equipped with catch pit, ladder, it is convenient for the sewage lifting pump work and maintenance；Air stirrer is additionally provided in the conditioning tank
And floating ball lever meter, the air stirrer carry out periodic agitation, drain the sediment in the conditioning tank in time, institute
The switch that floating ball lever meter controls the sewage pump by water level height in the conditioning tank is stated, i.e. height opens low stop.
3. a kind of domestic sewage treatment process according to claim 1, which is characterized in that aerobic tank described in step (2)
Water part be back to anoxic pond, and reflux is realized by nitrification liquid reflux pump.
4. a kind of domestic sewage treatment process according to claim 1, which is characterized in that anoxic pond described in step (2)
Interior be aerated by blower supplies oxygen；There is nitrifier in the aerobic tank, and be aerated and supplied oxygen by blower.
5. a kind of domestic sewage treatment process according to claim 4, which is characterized in that filled with half in the aerobic tank
Soft composite filling, and the nitrifier apposition growth is on the semi-soft composite filling, the semi-soft composite filling
Material is polypropylene (PP).
6. a kind of domestic sewage treatment process according to claim 1, which is characterized in that dissolved oxygen in the anoxic pond
Concentration is maintained at 0.5mg/l hereinafter, the concentration of dissolved oxygen is maintained at 1.0mg/l or more in the aerobic tank.
7. a kind of domestic sewage treatment process according to claim 1, which is characterized in that two is heavy described in step (3)
Pond uses vertical sedimentation basin, sets central draft tube in the secondary settling tank；Aeration stirring system, sludge are set in the sludge-tank
Supernatant after precipitation concentration is back to the conditioning tank and is reprocessed, and sludge makees periodically suction outward transport disposition.
8. a kind of domestic sewage treatment process according to claim 1, which is characterized in that sewage is described in step (5)
It is sterilized in sterilization pool by chlorine system disinfectant；Disinfection chemicals dosing plant is connected in the sterilization pool, in the disinfection chemicals dosing plant
Equipped with metering pump and blender.
9. a kind of domestic sewage treatment process according to claim 1, which is characterized in that it further include recoil pump, it is described anti-
Punching pump one end is connect with the sterilization pool, and one end is connect with the quartz filter and active carbon filter.
10. a kind of domestic sewage treatment process described in -9 according to claim 1, which is characterized in that further include pipe valve and electricity
Gas control system；The pipe valve includes that pipeline, valve, pipe fitting and installation attachment, the electric control system can be compiled using PLC
The control of journey host；The electric control system and the sewage pump, air stirrer, floating ball lever meter, blower, disinfection
Chemicals dosing plant, middle water pump, recoil pump, the connection of nitrification liquid reflux pump electric wire.
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| CN201811284102.5A CN109179910A (en) | 2018-10-19 | 2018-10-19 | A kind of domestic sewage treatment process |
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| CN110386668A (en) * | 2019-09-04 | 2019-10-29 | 山东和正环保工程有限公司 | A kind of economic benefits and social benefits denitrification dephosphorization apparatus |
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| CN110386668A (en) * | 2019-09-04 | 2019-10-29 | 山东和正环保工程有限公司 | A kind of economic benefits and social benefits denitrification dephosphorization apparatus |
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