CN107746159A - A kind of New Type of Sewage Treatment System and technique - Google Patents
A kind of New Type of Sewage Treatment System and technique Download PDFInfo
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- CN107746159A CN107746159A CN201711205042.9A CN201711205042A CN107746159A CN 107746159 A CN107746159 A CN 107746159A CN 201711205042 A CN201711205042 A CN 201711205042A CN 107746159 A CN107746159 A CN 107746159A
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- 239000010865 sewage Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000006228 supernatant Substances 0.000 claims abstract description 9
- 239000012223 aqueous fraction Substances 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 9
- 230000004044 response Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 26
- 229910052799 carbon Inorganic materials 0.000 description 26
- 238000006396 nitration reaction Methods 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 8
- 229920000388 Polyphosphate Polymers 0.000 description 7
- 229920000037 Polyproline Polymers 0.000 description 7
- 238000005273 aeration Methods 0.000 description 7
- 239000001205 polyphosphate Substances 0.000 description 7
- 235000011176 polyphosphates Nutrition 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 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 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- 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
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- 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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- 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)
- Biodiversity & Conservation Biology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of New Type of Sewage Treatment System and technique, including anaerobic pond, first anoxic pond, first Aerobic Pond, second anoxic pond, second Aerobic Pond, 3rd anoxic pond, 3rd Aerobic Pond, second pond and pre- anoxic pond, the anaerobic pond, first anoxic pond, first Aerobic Pond, second anoxic pond, second Aerobic Pond, 3rd anoxic pond, 3rd Aerobic Pond and second pond are sequentially communicated, the pre- anoxic pond respectively with second pond, anaerobic pond and the connection of the 3rd Aerobic Pond, part sludge stream is to pre- anoxic pond in the second pond, the supernatant of the pre- anoxic pond is back to the 3rd Aerobic Pond, the thickened sludge of the pre- anoxic pond is back to anaerobic pond, the second Aerobic Pond foul water fraction is back to the first anoxic pond；The part of contaminated water of the anaerobic pond directly branches to the second anoxic pond, and this programme optimizes the reaction rate and efficiency of total system, enhances the function of denitrogenation dephosphorizing, so as to obtain more efficient treatment effect in measured response volume.
Description
Technical field
The present invention relates to technical field of sewage, in particular to a kind of New Type of Sewage Treatment System and technique.
Background technology
AAO methods are also known as A2O methods, are the abbreviations of anaerobic- anoxic- oxic method, are a kind of conventional sewage treatment process, can use
In B-grade sewage processing or three-level sewage disposal, and Treated sewage reusing, there is good Nitrogen/Phosphorus Removal.Anaerobic reactor,
Raw sewage is synchronous with the phosphorous returned sludge discharged from second pond to be entered, and this reactor major function is to discharge phosphorus, while part
Organic matter carries out ammonification；Anoxic reacter, premiere feature are denitrogenations, and nitrate nitrogen is to be sent by interior circulation by aerobic reactor
, the mixing liquid measure of circulation is larger, generally 2Q (Q is raw sewage flow)；Aerobic reactor, i.e. aeration tank, this reaction list
Member is multi-functional, removes BOD, and nitrification and absorption phosphorus etc. are carried out here, and flow is that 2Q mixed liquor is back to from here
Anoxic reacter.In the prior art, it is that the sludge in second pond is directly back to anaerobic pond, because meeting flow is larger, can makes
The dilution of the reactant of paired systems anaerobic zone and anterior reaction zone particularly carbon source organic concentration.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind New Type of Sewage Treatment System and technique,
This programme optimizes the reaction rate and efficiency of total system, enhances the function of denitrogenation dephosphorizing, so as in measured response body
More efficient treatment effect is obtained in product.
To achieve the above object, the present invention provides following technical scheme：
A kind of New Type of Sewage Treatment System, including anaerobic pond, the first anoxic pond, the first Aerobic Pond, the second anoxic pond, second
Aerobic Pond, the 3rd anoxic pond, the 3rd Aerobic Pond, second pond and pre- anoxic pond, it is the anaerobic pond, the first anoxic pond, first aerobic
Pond, the second anoxic pond, the second Aerobic Pond, the 3rd anoxic pond, the 3rd Aerobic Pond and second pond are sequentially communicated, the pre- anoxic pond point
Do not connected with second pond, anaerobic pond and the 3rd Aerobic Pond, part sludge stream is to pre- anoxic pond, the pre- anoxic in the second pond
The supernatant in pond is back to the 3rd Aerobic Pond, and the thickened sludge of the pre- anoxic pond is back to anaerobic pond, second Aerobic Pond
Foul water fraction is back to the first anoxic pond；The part of contaminated water of the anaerobic pond directly branches to the second anoxic pond.
Further, comprise the following steps：Sewage is successively by anaerobic pond, the first anoxic pond, the first Aerobic Pond, the second anoxic
After pond, the second Aerobic Pond, the 3rd anoxic pond and the processing of the 3rd Aerobic Pond, second pond is flowed into, then part of contaminated water stream in second pond
Enter pre- anoxic pond to be precipitated, the thickened sludge obtained after precipitation is back to anaerobic pond.
Further, the supernatant of the pre- anoxic pond is back to the 3rd Aerobic Pond.
Further, the thickened sludge amount that the pre- anoxic pond is back to anaerobic pond is 0.25-0.3Q.
Further, the part water outlet of the anaerobic pond directly branches to the second anoxic pond.
Further, the sewage quantity that the anaerobic pond directly branches to the second anoxic pond is 0.45-0.5Q.
Further, the part effluent recycling of the second Aerobic Pond is to the first anoxic pond.
Further, the sewage quantity that the second Aerobic Pond is back to the first anoxic pond is 1Q.
Beneficial effects of the present invention are as follows：
(1) pre- anoxic pond is set, carries out returned sludge concentration
The purpose of returned sludge concentration is further to separate muddy water, it is achieved thereby that the capacity of returns of former technique 30% is passed through
Mixed after denitrification process under the conditions of high sludge concentration into anaerobic zone with raw wastewater and carry out anaerobic reaction.Not only increase and be
The sludge concentration of system front end, increase the actual residence time, and reduce reaction of the backflow to system anaerobic zone and anterior reaction zone
The dilution of thing particularly carbon source organic concentration, and nitrate is controlled into the total amount of anaerobic zone.
From the sludge that second pond flows back after the concentration of pre- anoxic pond, only by the sludge reflux after concentration to anaerobic pond, supernatant
Liquid is back to the 3rd Aerobic Pond, reduces the backflow total amount into anaerobic reation pool, and its effective capacity of returns is not reduced.Once
Mud-water separating area bottom capacity of returns is fixed, and additional backflow only can increase the suspended solid amount of backflow, will not cause anaerobic zone
Dilution.In backflow mixed liquor after concentration, pre- anoxic pond continues denitrification to remaining NO3--N (nitrate nitrogen), by
20,000mg/L can be reached in the MLSS (mixed genetic-neural network) after sludge condensation, the endogenous of high concentration MLSS is exhaled
Suction effect produces great demand to oxygen, so as to enhance the reduction of the denitrification of pre- anoxic pond and NO3--N concentration.Compared with Gao Wei
Under biological concentration, the degree of endogenous denitrification is considerable.NO3--N by pre- anoxic pond can be controlled in 2mg/L extremely
3mg/L, to ensure not influenceing anaerobic pond operation, while prevent phosphorus from being discharged in the absorption of pre- anoxic pond.It is back to the total of anaerobic pond
Flow is reduced, and more ensure that the NO3--N of backflow and anaerobic state is influenceed to bottom out.
The sludge condensation area that this sludge treating system is set serves key effect in systems, and pre- anoxic pond carries out muddy water
Separation, concentrates the sludge for being back to anaerobic pond, supernatant is returned directly to the 3rd Aerobic Pond origin or beginning.Ekama it is proposed that biology
The key of dephosphorization is the acquisition of VFA (VFA), the quantity of general heterotrophic bacteria and polyP bacteria and remaining oxygen source.
VFA caused by the VFA and the heterotroph conversion BCOD organic carbon source of explanation (can biology) that VFA amount is depended in the water of source, source water
Depending on middle VFA is by water quality, and then it is decided by the quantity and hydraulic detention time of heterotrophic microorganism by BCOD conversions VFA, it is actual
Hydraulic detention time is decided by raw water flow and capacity of returns, and capacity of returns is smaller；Actual hydraulic detention time is longer, in addition capacity of returns
It is bigger to dilute existing VFA, while it is carried under one's arms to aeration tank, VFA amount is reduced, the quantity of high concentration microorganism is a large amount of
VFA is produced, also add the amount of polyP bacteria, under the premise of a large amount of VFA presence, polyP bacteria releases phosphorus and storage PHB (poly butyrics
Ester) height of efficiency miraculously, so as to improve the dephosphorization efficiency of system, when extending actual hydraulic retention by reducing capacity of returns
Between, provide more chances that PHB is converted into using VFA to polyP bacteria.
The rising of anaerobic pond sludge concentration and actual hydraulic detention time, which lengthen, also provide enhanced SBCOD (organic carbons of degrading slowly
Source) hydrolysis effect so that it can be degraded in the denitrification process of anoxic pond without being carried under one's arms to aeration tank.Take full advantage of
Limited carbon source, reduces system energy consumption.The reduction of capacity of returns add simultaneously the actual hydraulic detention time of each anoxic section so as to
Enhance the anti-nitration reaction of anoxic pond.The increase of anoxic pond sludge concentration not only ensure that the reinforcing of anti-nitration reaction, reduce
Slow degraded organic carbon source is carried under one's arms probability to aeration tank, also provide enhanced the speed of Endogenous degradation anti-nitration reaction, so as to protect
Limited carbon source making full use of in anti-nitration reaction is demonstrate,proved.
Reduce the flow of whole system after backflow concentration, when adding the actual stop of sludge concentration and front end area
Between, except enhancing above-mentioned biological phosphate-eliminating and anti-nitration reaction, while also increase the total amount of nitrifier, actual nitration reaction
Time and the reactant concentration of front end area.Nitration reaction is enhanced, ensure that the clearance of system organic nitrogen and ammonia nitrogen.
The anaerobic condition enhanced also inhibits the growth of der Pilz, improve the precipitated form of sludge, existing use
The SVI (sludge volume index) of the sewage plant of the concept ensure that the raising of sludge concentration 50 or so.
(2) sludge all after concentration enters anaerobic pond
Sludge condensation causes the sludge concentration of the first anoxic pond and actual residence time all to substantially increase.Endogenous degradation
Oxygen demand fully meets and sufficiently low requirement is down into anaerobic pond NO3-N；So that whole waste water enter anterior anaerobic pond
Become feasible.Anaerobic pond is only built up in front end and only a water inlet make it that system is correspondingly simple.All after concentration
Sludge (i.e. all backflow waste water) enters the concentration that anaerobic pond adds anaerobic pond BOD5 (biochemical requirement on the 5th) and VFA, strengthens
The effect of biological phosphate-eliminating.
At the same time, SBCOD has a longer process converted to Degradable organic carbon BCOD so that it can lacked
It is fully utilized in the denitrification process in oxygen area without being carried under one's arms to aeration tank；So as to enhance anti-nitration reaction while also big
The big oxygen demand for reducing aerobic zone organic carbon source, the growth conditions of aeration zone nitrifier is optimized, enhance the nitrification of system
Reaction efficiency.
The mixed liquor of anaerobic pond branches to first three anoxic pond to ensure that all raw wastewater carbon sources are preferentially used in anoxic pond
Denitrification.This circulation can not only strengthen the denitrification of anoxic pond, and be caused by shunting of the anaerobic pond to multistage anoxic pond
The growth that polyP bacteria inhales phosphorus, releases phosphorus, can promote polyP bacteria under varying environment.Can oxygen as electron acceptor, polyP bacteria by the use of NO-N
Change the concept that PHB, i.e. a carbon two in vivo are stored during releasing phosphorus.Further take full advantage of limited carbon source.
(3) three sections " lacking-aerobic reactor zone ", the mixed liquor of anaerobic pond branches to the first two anoxic pond
In addition to the first anoxic pond is using aerobic backflow denitrification, other each section of anoxic section is mainly by the aerobic nitrification of the last period
NO3-N denitrifications.Return-flow system in traditional big flow is eliminated, improves the actual residence time in each region in system,
The dilution of anoxic zone organic carbon source, takes full advantage of carbon source, enhances anti-nitration reaction caused by reducing backflow.3rd anoxic
Pond is exaggerated the residence time, enhances the endogenous denitrification of this section, while set up additional carbon facility in the section and ensure that
The abundant denitrification of this section is sufficiently low so as to ensureing that water outlet total nitrogen can be up to standard to ensure to leave the NOx-N in the mixed liquor of this section.
In summary, system solution takes full advantage of limited carbon source, it would be desirable to additional carbon fall below bottom line,
Also enable the system to meet total nitrogen emission request on the basis of not increasing pond and holding simultaneously, be fully able to effluent quality being promoted to one
Level standard.
Segmentation increase load and the effectively degraded of anoxic zone carbon source substantially reduce the oxygen demand in each aerobic aeration area, improve
Biotic factor, enhance nitration reaction.The backflow increased real reaction time in traditional big flow is saved further to facilitate
The reinforcing of nitration reaction.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention；
Fig. 2 is the biological reaction pool structural representation of the present invention.
Wherein, 1-- anaerobic ponds, the anoxic ponds of 21-- first, the anoxic ponds of 22-- second, the anoxic ponds of 23-- the 3rd, 31-- first
Aerobic Pond, the Aerobic Ponds of 32-- second, the Aerobic Ponds of 33-- the 3rd, 4-- transition pond.
Embodiment
In order that those skilled in the art more fully understand technical scheme, it is right with reference to the accompanying drawing of the present invention
Technical scheme carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art exist
The other similar embodiments obtained on the premise of not making creative work, it should all belong to the scope of the application protection.
Embodiment one：
As depicted in figs. 1 and 2, a kind of New Type of Sewage Treatment System, including anaerobic pond 1, the first anoxic pond 21, first are aerobic
Pond 31, the second anoxic pond 22, the second Aerobic Pond 32, the 3rd anoxic pond 23, the 3rd Aerobic Pond 33, second pond and pre- anoxic pond, detest
Oxygen pond 1, the first anoxic pond 21, the first Aerobic Pond 31, the second anoxic pond 22, the second Aerobic Pond 32, the 3rd anoxic pond the 23, the 3rd are good
Oxygen pond 33 and second pond are sequentially communicated, and pre- anoxic pond connects with second pond, the Aerobic Pond 33 of anaerobic pond 1 and the 3rd respectively, second pond
Middle part sludge stream is back to the 3rd Aerobic Pond 33, the thickened sludge of pre- anoxic pond to pre- anoxic pond, the supernatant of pre- anoxic pond
Anaerobic pond 1 is back to, the foul water fraction of the second Aerobic Pond 32 is back to the first anoxic pond 21；The part of contaminated water of anaerobic pond 1 is directly divided
It flow to the second anoxic pond 22.3rd anoxic pond 23 is provided with the dosing mouth for being used for adding standby carbon source.3rd Aerobic Pond 33, which is provided with, to be used
In the dosing mouth for adding standby medicament.In addition, being additionally provided with transition pond 4 between anoxic pond and Aerobic Pond, arrow represents current in figure
Direction.
A kind of sewage treatment process, comprises the following steps：Sewage enters anaerobic pond 1 by water inlet pipe, then in turn through
One anoxic pond 21, the first Aerobic Pond 31, the second anoxic pond 22, the second Aerobic Pond 32, the 3rd anoxic pond 23 and the 3rd Aerobic Pond 33
After processing, second pond is flowed into, then the sewage backflow containing activated sludge to pre- anoxic pond is precipitated in second pond, after precipitation
Obtained thickened sludge is all back to anaerobic pond 1 by return line, and pre- anoxic pond is back to the thickened sludge amount of anaerobic pond 1
For 0.25-0.3Q, the supernatant after precipitation is back to the 3rd Aerobic Pond 33 by return line.The part water outlet of anaerobic pond 1 is straight
Connect and branch to the second anoxic pond 22, the sewage quantity that anaerobic pond 1 directly branches to the second anoxic pond 22 is 0.45-0.5Q.It is second best
The part water outlet in oxygen pond 32 is back to the first anoxic pond 21 by reflux pump and backflow canal, and the second Aerobic Pond 32 is back to first and lacked
The sewage quantity in oxygen pond 21 is 1Q.
The advantages of the application, is as follows：
(1) reasonable distribution carbon source, all former water inlet organic carbon sources are preferentially used into anaerobic pond 1 by dephosphorization bacterial, by force
PHB generation is changed.And PHB dephosphorization absorption is preferentially completed through denitrification under anoxic conditions, the effect of a carbon two is facilitated
Should.
(2) add returned sludge concentration and reduce the backflow of system, the carbon source concentration of anoxic zone is added one times
And anaerobic zone carbon source concentration adds 2 times, reaction rate is substantially increased, it is big especially more than the anaerobic zone VFA concentration of three times
The earth enhances PHB generation, and so as to enhance the biological phosphate-eliminating effect of system, and the anoxic zone carbon source doubled also greatly improves
Anti-nitration reaction speed.
(3) 3.5Q by water from the former AAO techniques of anoxic pond and anaerobic pond reduces to 1.2Q, anaerobic pond and anoxic pond
The actual residence time adds three times, enhances the efficiency of biological phosphate-eliminating and anti-nitration reaction significantly.
(4) pre- anoxic pond is added.Due to the water only 0.25Q by the pond, i.e. its actual reaction time, it is small to reach 2
When, under the conditions of 18000mg/L MLSS, the aerobic ability of its Endogenous degradation is larger, can be by 10mg/L-15mg/L in phegma
NO3-N be down to below 3mg/L so that the anaerobic state of anaerobic zone is more perfect.
(5) perfect anaerobic condition, higher sludge concentration and carbon source concentration, extend the actual residence time enhance it is organic
The acidified degradation effect of thing, it is set to be more easy to degrade in anoxic pond, while further intensified anti-nitrated reaction, reduce aerobic zone
Oxygen demand is so as to the indirect help progress of nitration reaction.
(6) this programme employs the anti-nitration reaction technology that anaerobism shunts three sections of anoxics, is effective profit the characteristics of the technology
With carbon source, backflow is reduced, increases real reaction time, intensified anti-nitrated reaction.
(7) after above-mentioned Optimized Measures, water outlet total phosphorus can be down to below 2.5mg/L, and total nitrogen is then down to below 15mg/L.
(8) after this technological transformation, effluent quality can be improved, water outlet substantially meets first level A.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (8)
1. a kind of New Type of Sewage Treatment System, it is characterised in that lacked including anaerobic pond, the first anoxic pond, the first Aerobic Pond, second
Oxygen pond, the second Aerobic Pond, the 3rd anoxic pond, the 3rd Aerobic Pond, second pond and pre- anoxic pond, the anaerobic pond, the first anoxic pond,
First Aerobic Pond, the second anoxic pond, the second Aerobic Pond, the 3rd anoxic pond, the 3rd Aerobic Pond and second pond are sequentially communicated, described pre-
Anoxic pond connects with second pond, anaerobic pond and the 3rd Aerobic Pond respectively, and part sludge stream is to pre- anoxic pond, institute in the second pond
The supernatant for stating pre- anoxic pond is back to the 3rd Aerobic Pond, and the thickened sludge of the pre- anoxic pond is back to anaerobic pond, and described
Two Aerobic Pond foul water fractions are back to the first anoxic pond；The part of contaminated water of the anaerobic pond directly branches to the second anoxic pond.
2. a kind of sewage treatment process, it is characterised in that comprise the following steps：Sewage successively by anaerobic pond, the first anoxic pond,
After first Aerobic Pond, the second anoxic pond, the second Aerobic Pond, the 3rd anoxic pond and the processing of the 3rd Aerobic Pond, second pond is flowed into, then
Part of contaminated water flows into pre- anoxic pond and precipitated in second pond, and the thickened sludge obtained after precipitation is back to anaerobic pond.
3. sewage treatment process according to claim 2, it is characterised in that the supernatant of the pre- anoxic pond is back to
Three Aerobic Ponds.
4. sewage treatment process according to claim 2, it is characterised in that the pre- anoxic pond is back to the dense of anaerobic pond
Contracting sludge quantity is 0.25-0.3Q.
5. sewage treatment process according to claim 2, it is characterised in that the part water outlet of the anaerobic pond directly shunts
To the second anoxic pond.
6. sewage treatment process according to claim 5, it is characterised in that the anaerobic pond directly branches to the second anoxic
The sewage quantity in pond is 0.45-0.5Q.
7. according to any described sewage treatment process of claim 2-6, it is characterised in that the part water outlet of the second Aerobic Pond is returned
It flow to the first anoxic pond.
8. sewage treatment process according to claim 7, it is characterised in that the second Aerobic Pond is back to the first anoxic pond
Sewage quantity is 1Q.
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| CN110550813A (en) * | 2018-09-28 | 2019-12-10 | 广东新会中集特种运输设备有限公司 | Sewage treatment device |
| CN112374696A (en) * | 2020-11-09 | 2021-02-19 | 河北先河正合环境科技有限公司 | System and method for treating sewage by multistage multi-point water inflow enhanced denitrification |
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