CN110482702A - A kind of high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption - Google Patents
A kind of high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption Download PDFInfo
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 80
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 56
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 25
- 239000011574 phosphorus Substances 0.000 title claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 131
- 239000010865 sewage Substances 0.000 claims abstract description 85
- 238000004062 sedimentation Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims description 33
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 238000011282 treatment Methods 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052799 carbon Inorganic materials 0.000 abstract description 19
- 238000004065 wastewater treatment Methods 0.000 abstract description 9
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010842 industrial wastewater Substances 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract 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 12
- 239000005416 organic matter Substances 0.000 description 12
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910002651 NO3 Inorganic materials 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 206010021143 Hypoxia Diseases 0.000 description 6
- 230000007954 hypoxia Effects 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 241001672694 Citrus reticulata Species 0.000 description 4
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 125000001477 organic nitrogen group Chemical group 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009294 enhanced biological phosphorus removal Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FWLDLPLBLLYROD-UHFFFAOYSA-N N.[N].[O] Chemical compound N.[N].[O] FWLDLPLBLLYROD-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000012223 aqueous fraction Substances 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical group 0.000 description 1
- 230000004663 cell proliferation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 210000000805 cytoplasm Anatomy 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 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
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229940063921 nitrogen 75 % Drugs 0.000 description 1
- -1 nitrogen-containing organic compound Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007790 solid phase Substances 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
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
- C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
-
- 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
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- 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
- C02F2209/16—Total nitrogen (tkN-N)
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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
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption that the invention discloses a kind of belongs to water environment protection technical field, the biological denitrification process of specially two aerobic tanks and anoxic pond composition.This method considers the huge and negatively charged characteristic of activated sludge surface area according to the basic principle and denitrogenation feature of biological denitrificaion, for traditional ANThe biological denitrification phosphorous removal technique of/O anaerobic-aerobic improves.By increasing considerably anoxic pond sludge concentration, and intermediate sedimentation pond is set after anoxic pond, by intermediate sedimentation pond by sludge and sewage separation, then the sewage of shunting and sludge are aoxidized respectively, due to enhancing suction-operated of the sludge to ammonia nitrogen, in the case where carbon source demand is less, it can achieve the purpose that the removal rate for significantly improving total nitrogen and ammonia nitrogen, be particularly suitable for carbon source it is lower and in the more demanding sanitary sewage disposal of denitrification percent and the approximate Industrial Wastewater Treatment of water quality.
Description
Technical field
The invention belongs to water environment protection technical fields, are tradition ANThe biological denitrification phosphorous removal technique of/O anaerobic-aerobic
Improvement more particularly to a kind of high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption.
Background technique
During urban wastewater treatment, removes total nitrogen and total phosphorus is respectively necessary for meeting certain organic object amount, due to current
Town sewage plant entering organic matter of water concentration is generally relatively low, causes town sewage nitrogen phosphorus ligands difficult.Town sewage plant usually stresses
Removed in by total nitrogen, and the removal of total phosphorus can be completed to a certain extent by dosing, for low ratio of carbon to ammonium sewage how
Improve one of the critical issue that nitrogen removal rate is current urban wastewater treatment.
Traditional biological denitrification method is AN/ O technique, the process of the technique are as follows: AN/ O process spent water initially enters anoxic
The nitrate of pond (pond A), the organic matter of water inlet and reflux (containing reflux and sludge reflux in sewage) carries out anti-nitration reaction, the work
The denitrification percent of skill depends on reflux ratio, if reflux and sludge reflux add up to 300% in sewage, theoretically nitrogen removal rate can
To reach (300 ÷ 400) × 100%=75%.If desired denitrification percent is further increased, then only further increases reflux ratio,
But the excessive one side reactor volume of reflux ratio increases, power consumption increases, and on the other hand also results in anoxic and aerobic boundary
Limit has been hard to tell, and two reactors of anoxic pond and aerobic tank are seen on the whole is thoroughly mixed the anti-of fluidised form closer to being one
Device is answered, denitrification percent can not further increase at all.To sum up, the nitrogen removal rate of traditional biological denitrification process is difficult further to mention
Height, runs even across parameter optimization when technique actual motion, and nitrogen removal rate generally can be only sustained at 70% or so, work as water inlet
When total nitrogen concentration is higher, it is usually unable to satisfy discharge water quality requirement.
In addition, being intake based on current urban wastewater treatment firm, universal carbon source is insufficient, and carbon-nitrogen ratio is often difficult to meet not less than 4
Requirement, when the carbon-nitrogen ratio of water inlet cannot be met the requirements, nitrogen removal rate is remarkably decreased, it is easy to cause water outlet cannot reach
Mark.Therefore seek very urgent suitable for the high efficiency, low cost denitrogenation technology of low-carbon-source.The main counter-measure taken at present, which has, to be changed
Become a variety of methods such as water inlet strategy, Anammox, short-cut nitrification and denitrification, endogenous denitrification, hydrogen autotrophic type denitrification, is not having
Additional carbon substance usually can be also selected in the case where the counter-measure having had.Additional carbon is simple, but with high costs, sewage plant
It is difficult to bear；Change water inlet strategy at present usually using measures such as substep water inlets (multipoint water feeding), but process flow is more complex, structure
It is more to build object, operating cost dramatically increases.Anammox technology can fundamentally solve the problems, such as that carbon source is insufficient, but anaerobism
The condition that ammoxidation needs is very harsh, applies in general to the industrial wastewater of high ammonia nitrogen, is difficult to apply to urban wastewater treatment neck
Domain, currently based on the denitrification process of Anammox method exploitation applied to urban wastewater treatment still without mature technology.
Summary of the invention
In order to solve problem above, the high-efficiency biological denitrification for the aerobic shunting based on ammonia nitrogen absorption that the present invention provides a kind of
Dephosphorization system and method have broken through traditional ANThe limitation that the nitrogen removal rates such as/O technique can not improve, and it is insufficient to carbon source
When cities and towns or Industrial Waste Water Treatments, the technical problems such as effluent quality can not be up to standard.
The present invention is realized using following technical scheme:
The high-efficiency biological nitrogen and phosphorus removal system for the aerobic shunting based on ammonia nitrogen absorption that the present invention provides a kind of, according to water flow
Direction, including set gradually anoxic pond, intermediate sedimentation pond, sewage aerobic pond, secondary sedimentation tank, further include that setting is heavy in centre
Sludge aerobic pond on shallow lake pond and the sludge reflux path of secondary sedimentation tank forms a kind of new A/O2Process system.
It is further preferred that further including the anaerobic pond that anoxic pond upstream is arranged in, anaerobic pond main purpose is hydrolysis acidification
Organic matter also can suitably take into account the function of enhanced biological phosphorus removal, form a kind of new A2/O2Process system.
It is further preferred that the anoxic pond is pulling flow type anoxic pond, the 3-4 hypoxia response ponds being thoroughly mixed can be used
It is composed in series pulling flow type anoxic pond, or hypoxia response pond is separated into 3-4 sections of formation pulling flow type anoxic ponds；It is reacted using pulling flow type
Pond, it is ensured that in the end of plug-flow reactor when nitrate and (or) organic matter are by (or dense in the case where almost depleted
Spend very low), sludge can restore the adsorption capacity to ammonia nitrogen；If using traditional complete, nitre in reactor
Hydrochlorate, organic matter are consistent with ammonia nitrogen each point concentration, and ammonia nitrogen absorption effect is limited to a certain extent, are unfavorable for technique denitrogenation, and
Carbon source demand amount is larger；In addition, should also take appropriate action that reactor is avoided to form dead angle leads to sludgd deposition, such as using high
Press water column periodic flushing etc..
The high-efficiency biological nitrogen and phosphorus removal method for the aerobic shunting based on ammonia nitrogen absorption that the present invention also provides a kind of, step packet
It includes: treatment sewage being passed sequentially through into anoxic pond and intermediate sedimentation pond carries out anoxic denitrification and first time precipitation process, is passed through
The sewage and sludge of intermediate sedimentation pond separation are handled according to different paths respectively, and sludge enters sludge aerobic pond and carries out aerating oxidation
It is back in the response path of anoxic pond or its upstream afterwards, sewage, which enters after sewage aerobic pond carries out Aerobic Process for Treatment, to be partly refluxed to
Anoxic pond, another part, which enters secondary sedimentation tank, to carry out second being discharged discharge after precipitating, and the sludge in secondary sedimentation tank enters
Sludge aerobic pond is back in the response path of anoxic pond or its upstream after carrying out aerating oxidation.Wherein: increasing after anoxic pond
The purpose in one intermediate sedimentation pond is to separate the sewage sludge after hypoxia response, of less demanding to sedimentation effect, even if water outlet
Still there is a certain amount of SS to nor affect on the main functionality of technique；Sewage and sludge by the separation of intermediate sedimentation pond is not respectively according to
It being handled with path, sludge carries out aerating oxidation then all reflux, sewage then aerating oxidation then partial reflux partial discharge again,
This improved purpose is to improve nitrogen removal rate, while reducing total reflux ratio；When with sludge to be flowed into sludge good for a large amount of ammonia nitrogen
Oxygen pond, the ammonia nitrogen ratio in technique by nitrification improve, and achieve the purpose that improve nitrogen removal rate.
It is further preferred that the return sludge ratio of system is improved, while sewage backflow ratio (mixed liquid recycle ratio) being dropped
It is low, it can specifically be arranged according to the sedimentation function in intermediate sedimentation pond and to denitrogenation requirement, it is preferable that the sludge of two sedimentation basins returns
For stream than adding up to 200-250%, sewage backflow ratio is 50-100%, and total reflux ratio of sludge and sewage is 250-350%.This changes
Into purpose also for improve nitrogen removal rate because ammonia-nitrogen content is higher in sludge under conditions of total reflux ratio is certain,
Therefore it improves return sludge ratio and is advantageously implemented more Ammonia Nitrifications.
It is further preferred that adding filler in the sewage aerobic pond and anaerobic pond (if having), and filler is fixed on pond
It is interior；In view of the main purpose of technique is denitrogenation (carbon source is mainly used for denitrification), so anaerobic pond sludge back flow quantity is few, therefore detest
The sludge concentration in oxygen pond is mainly fixed in a manner of biomembrane microorganism and is realized；And sewage aerobic pond become a mandarin almost without or
Only minimal amount of suspended sludge, Gu Wushuihaoyangchi are also required to run in a manner of biomembrane；And the function in sewage aerobic pond is
Nitrification, the time in nitrifier epoch is long, and the performance of aerobic tank function is also beneficial to using relatively independent biomembrane mode.
It is further preferred that maintaining sludge concentration as high as possible in anoxic pond, sludge settling property, sludge are comprehensively considered
After many factors such as age, the sludge concentration MLSS of anoxic pond is preferably greater than 7000mg/L, MLSS in sludge aerobic pond in system
Concentration is greater than 12000mg/L, and other reactors are without especially control sludge concentration；The MLSS of anoxic pond high concentration is of the invention
One of key, the sludge of high concentration are able to the absorption to ammonia nitrogen and realize maximization, realizes to greatest extent with sludge reflux in this way
The nitrification of ammonia nitrogen；Anoxic pond sludge concentration is by sludge age and water inlet BOD5The influence of concentration, high sludge age and high water inlet BOD5It is dense
Degree is advantageously implemented anoxic pond high concentration MLSS；Under conditions of based on the sanitary sewage, usually water inlet BOD5Concentration is limited, when adopting
When taking high sludge age, general maintenance MLSS is easily in 7000mg/L or more.
It is further preferred that the assignment of traffic of the sludge and sewage that separate through intermediate sedimentation pond is that mud discharge is greater than sewage
Flow, mud discharge are greater than the foundation of the discharge of sewage: 1. system MLSS value is higher, under sedimentation time shorter restrictive condition,
Sludge hardly results in the concentration of higher degree, therefore (such as SV is less than 30-40%) for the very low possibility that is less susceptible to reach of SV value；②
Mud discharge is more slightly larger than the discharge of sewage, is also beneficial to improve nitric efficiency in fact.But sludge and the discharge of sewage are unsuitable more excessively high than also,
Otherwise it will lead to MLSS value in anoxic pond under the premise of water-inlet carbon source concentration is not high to be difficult to improve, therefore, sludge and sewage
It is preferred that flow-rate ratio (quality) is (1.1-1.4): 1；If intaking BOD5Concentration is high, then should be according in the determination of the sedimentation limit of sludge
Between sedimentation basin mud extraction and water flow ratio, thus further decreased under the premise of maintaining anoxic pond MLSS total reflux ratio with
Reduce energy consumption.
It is further preferred that sludge age takes the larger value；Consider influent quality and the requirement of denitrogenation etc., and further considers dirty
Many factors, the sludge age value range such as the activity of mud and cohesion performance are preferably 25-60d；If intaking BOD5Concentration is high, still
There is the possibility for further increasing sludge age, but also unsuitable excessively high, otherwise the cohesion performance of sludge may be poor.
It is further preferred that the medicament of Sludge Surface charging performance can be improved in the addition of the middle section of pulling flow type anoxic pond,
Molysite is added in sewage aerobic pond, these measures is taken to be conducive to the removal rate that technique further increases total nitrogen and total phosphorus.
Wastewater treatment process is as follows:
Raw sewage first passes around anaerobic pond processing, and the hydrolyzed acidification of organic matter is carboxylic acid and alcohol of small molecule etc..Anaerobic pond
Hydraulic detention time is unsuitable too long, to avoid organic matter from forming complete anaerobic biological process and result in methane, if not needing
Enhanced biological phosphorus removal, anaerobic pond can be not provided with.Sewage enters anoxic pond, returned sludge and reflux sewage bring after Anaerobic Treatment
Nitrate enters anoxic pond, therefore in the case where water-inlet carbon source is as reducing agent, biological denitrification can be carried out, nitrate anion is gone
Except to realize biological denitrificaion.After anoxic treatment, nitrate is consumed.Anoxic pond water outlet enters intermediate sedimentation pond, sewage
It is flowed into the oxidation of sewage aerobic pond, and sludge is flowed into the oxidation of sludge aerobic pond.Sewage partially goes out through peroxidating rear portion point reflux
Water discharge；It all flows back after sludge oxidation, fraction flows back into anaerobic pond, largely flows back into anoxic pond (front end or middle part).
By this improvement, in the case where total reflux ratio of sewage and sludge does not have increased situation, denitrification percent is available to be significantly improved, and right
The demand of carbon source is reduced.
Why this method realizes high denitrification percent under conditions of low-carbon-source, main cause be after hypoxia response immediately
Mud-water separation is carried out, a large amount of ammonia nitrogen enters sludge aerobic aerating system with sludge, and aerobic aeration will during sludge reflux
Mineralized nitrogen is nitrate, accordingly even when reflux ratio does not improve (or even reducing), but is converted into nitric acid in total nitrogen of intaking
The ratio of salt nitrogen improves instead, so that denitrification percent significantly improves.Since the carbon source of anoxic pond can be matched with nitrate, therefore lack
Oxygen pond goes out BOD in the sewage flowed5Concentration can be lower, and no matter how high reflux ratio is for traditional handicraft, and the carbon source of anoxic pond all cannot
It makes full use of, anoxic pond goes out to flow BOD5Certain concentration is maintained, this partial organic substances is consumed in aerobic reactor by heterotroph,
It can not be utilized by denitrification process.
System and method is applicable in the transformation of the various biological denitrification process comprising anaerobic-aerobic, such as AN/ O work
Skill, Bardenpho technique etc.；It is also applied for the transformation of the various biological denitrification phosphorous removal techniques comprising anaerobic- anoxic- oxic, such as
A/A/O technique, inversion A/A/O technique, UCT, VIP technique etc..
The beneficial effects of the present invention are: basic principle and denitrogenation feature of the present invention according to biological denitrificaion, and activity are dirty
The huge and negatively charged characteristic of mud surface area, for traditional ANThe biological denitrification phosphorous removal technique of the anaerobic-aerobics such as/O, provides
A kind of aerobic shunting high-efficiency biological nitrogen and phosphorus removal system and method based on ammonia nitrogen absorption, this method after anoxic pond by being arranged
Then intermediate sedimentation pond aoxidizes the sewage of shunting and sludge respectively by intermediate sedimentation pond by sludge and sewage separation,
Since the objective reality that sludge acts on ammonia nitrogen absorption can reach in the case where carbon source demand is less and significantly improve total nitrogen
With the purpose of the removal rate of ammonia nitrogen, it is particularly suitable for lower and more demanding to the denitrification percent sanitary sewage disposal of carbon source, and
The approximate Industrial Wastewater Treatment of water quality, specific advantage include；
1) carbon source demand can be less than traditional handicraft, and denitrification percent is significantly higher than traditional handicraft；
2) process flow is simpler, and an intermediate sedimentation pond and aerobic tank are increased only compared with traditional handicraft, is suitable for
The transformation of prior art；
3) total reflux ratio does not increase or even decreases, and operation energy consumption is lower；
4) excess sludge discharge substantially reduces, and reduces Treatment of Sludge expense；
5) be biofilm and activated sludge process combination, mixing sludge sedimentation function is good, therefore stable and reliable operation.
Detailed description of the invention
Fig. 1 is the high-efficiency biological nitrogen and phosphorus removal system structure diagram of the aerobic shunting based on ammonia nitrogen absorption；
Fig. 2 is that the sludge of embodiment 1 and sewage backflow compare schematic diagram.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention will be described, it should be understood that embodiment described herein
The process of technique, construction, parameter etc. only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention；Institute in embodiment
The example that the design parameter given is intended to be merely illustrative of the present, and the parameter of nonessential use.Actually process/method can be with
It is suitable for various scales and property includes the sewage treatment process that anoxic and aerobic reaction tank can be realized biological denitrificaion, specifically answers
With the process flow arrangement and example values for being not limited to embodiment.It is straight to certain parameters in order to facilitate discussing and illustrate
It connects and specifies specific value, these numerical value are all based on theoretical estimated value, have certain difference in practical projects, work as application
With the discrepant occasion of specified parameter, it should modification appropriate is carried out according to engineering actual parameter.For biological denitrificaion or life
Sludge and sewage separation are carried out oxygen by object denitrification dephosphorization technique, all intermediate sedimentation ponds that is arranged after anoxic pond respectively after shunting
That changes belongs to the scope of the present invention.
Embodiment 1
Present embodiments provide a kind of high-efficiency biological nitrogen and phosphorus removal system of aerobic shunting based on ammonia nitrogen absorption, such as Fig. 1
It is shown, according to water (flow) direction, including set gradually anaerobic pond, anoxic pond, intermediate sedimentation pond, sewage aerobic pond, secondary precipitation
Pond further includes the sludge aerobic pond being arranged on intermediate sedimentation pond and the sludge reflux path of secondary sedimentation tank.
In order to reduce the demand to carbon source as far as possible, also for the absorption for being conducive to ammonia nitrogen, the anoxic pond is pulling flow type
Anoxic pond can be used the hypoxia response pond that 3-4 are thoroughly mixed and be composed in series pulling flow type anoxic pond, or hypoxia response pond is separated
At 3-4 sections of formation pulling flow type anoxic ponds.
Filler is added in the sewage aerobic pond and anaerobic pond, to maintain the microorganism concn in the pond, wire feeding
Preferably elastic filler is fixed in pond, and the specific material of filler, construction, arrangement quantity etc. can be according to Biological Contact Oxidation Process
Requirement carry out.
Sludge age in system takes the larger value, considers influent quality and the requirement of denitrogenation etc., and further considers sludge
Many factors, the sludge age value range such as activity and cohesion performance can be 25-60d.If intaking BOD5Concentration is high, still have into
The possibility of one step increase sludge age.But also unsuitable excessively high, otherwise the cohesion performance of sludge may be poor.
When being handled using the system, needs to maintain sludge concentration as high as possible in anoxic pond, comprehensively consider sludge settling
Performance, after many factors such as sludge age, the sludge concentration MLSS of anoxic pond is preferably greater than 7000mg/L, sludge aerobic in system
MLSS concentration is greater than 12000mg/L in pond, and other reactors are without especially control sludge concentration；It can be by improving sludge as far as possible
Settling property should be avoided sludge bulking, cancel primary deposition to realize high concentration MLSS, and in order to improve the settling property of sludge
Pond can also add the biggish powdered weighting agent of density on a small quantity in systems.
The sewage aerobic pond can also be substituted with biological aerated filter, to further increase system to BOD5With total nitrogen ammonia
The removal effect of nitrogen, but using after biological aerated filter, building equipment expense increases, operation and management workload and work difficulty
It will increase.
The present embodiment additionally provides a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption, such as schemes
Shown in 2, step includes:
Sewage is inputted anaerobic pond first by step 1., and it is low point that the organic matter of sewage, which is partially exploded, after Anaerobic Treatment
Organic acid and alcohol of son amount etc..After nitrogen-containing organic compound decomposes, organic nitrogen is converted into ammonia nitrogen.In order to be conducive to illustrate the present invention
Denitrification effect, it is assumed that in raw water kelvin nitrogen concentration be 50mg/L, wherein ammonia nitrogen concentration be 5mg/L, organic nitrogen concentration be 45mg/
L, nitrite nitrogen and nitrate nitrogen concentration are ignored.BOD5Concentration is 200mg/L, then carbon-nitrogen ratio is 4.0.By anaerobic pond
After processing, organic nitrogen is completely converted into ammonia nitrogen, then ammonia nitrogen concentration is 50mg/L, BOD5(should use up can according to 5% calculating for removal rate
It can control low BOD5Removal rate, BOD5Caused by removal mainly assimilates into cytoplasm, that is, it is converted into sludge), then BOD5Concentration
For 190mg/L.
Step 2. will input pulling flow type anoxic pond from anaerobic pond through step 1 treated sewage.In pulling flow type anoxic pond
Organic matter in sewage is mainly utilized by denitrification process, realizes denitrogenation.Nitrate then sludge and sewage from reflux.By
After the processing of pulling flow type anoxic pond, the organic matter in sewage is largely removed, and the ammonia nitrogen in sewage is then partially attracted to sludge
On, part still with dissolved state in water.Each water quality calculated result is as follows, and flow back sewage quality water: ammonia nitrogen 2mg/L, nitre
Hydrochlorate nitrogen 6mg/L, BOD5For 10mg/L, reflux ratio 65%；Returned sludge water quality and quantity is as follows: ammonia nitrogen 2mg/L, nitrate nitrogen
16.3mg/L BOD5For 10mg/L, reflux ratio 235%；Anaerobic pond water water quality and quantity is as follows: ammonia nitrogen 50mg/L, BOD5For
190mg/L, flow-rate ratio 100%.Therefore the water quality for entering the anoxic pond moment is following (total to flow back with sewage backflow to head end consideration
Than being calculated according to 300%): ammonia nitrogen concentration 14mg/L, nitrate nitrogen 10.6mg/L, BOD5For 55mg/L, relative discharge 400%.
Nitrate nitrogen almost removes after anoxic pond, can consider according to 0mg/L；BOD5It is needed according to the theory of carbon-nitrogen ratio
Amount removal, while considering cell Proliferation, anoxic pond goes out to flow BOD5About 23mg/L.I.e. anoxic pond is discharged: nitrate nitrogen is close
0mg/L, BOD5For 23mg/L, ammonia nitrogen 14mg/L.
Step 3. will carry out first time precipitation process through step 2 treated sewage input intermediate sedimentation pond, make muddy water point
From the sewage after separation flows into sewage aerobic pond, and sludge flows into sludge aerobic pond.Solid phase occurs during anoxic and turns for ammonia nitrogen
It moves, if anoxic pond sludge concentration is 7000mg/L, adsorption capacity considers that (activated sludge is to ammonia under normal circumstances according to 0.85mg/g
The adsorption capacity of nitrogen is in 0.5-0.8mg/g, and present invention process needs to maintain at runtime the surface negative charge of sludge as far as possible, preferably
A small amount of chemicals addition control), then go out the ammonia nitrogen concentration of stream sludge part after adsorbing shunting for 19.2mg/L (solubilised state and ADSORPTION STATE conjunction
Meter), the ammonia nitrogen concentration of foul water fraction is 8mg/L (solubilised state).
The sedimentation time in intermediate sedimentation pond is no more than 1h；The effluent quality in intermediate sedimentation pond is of less demanding, mainly will be dirty
Mud and sewage substantially separate, if having no substantial effect on technological effect containing a certain amount of SS in water outlet.If intermediate sedimentation pond
When there is bubble or precipitating difficult (under normal circumstances when precipitated between be no more than 2h, and nitrate concentration is not high, is seldom somebody's turn to do
May), suitable pulverulence weighting agent can be added to promote sludge in intermediate sedimentation pond in appropriate position in system
Precipitating, but flocculant should be used with caution.When using weighting agent, while the material used can be considered with good ammonia
N2 adsorption performance.One of measure is to add modified active carclazyte and flyash, and in laboratory under the conditions of lab scale, density is about
2.3g/cm3, (room temperature, neutral pH, sewage impurity and suspended matter is more and lower ammonia nitrogen under the conditions of conventional water treatment
Concentration) to the adsorption capacity about 2.5-7.0mg/g of ammonia nitrogen.
The sludge of intermediate sedimentation pond separation and the assignment of traffic of sewage are controlled, mud discharge is kept to be greater than the discharge of sewage, it is excellent
Selecting flow-rate ratio (quality) is (1.1-1.4): 1；If intaking BOD5Concentration is high, then should be determined according to the sedimentation limit of sludge intermediate
The mud extraction of sedimentation basin and water flow ratio, to further decrease total reflux ratio under the premise of maintaining anoxic pond MLSS to drop
Low energy consumption.
Step 4. will carry out aerating oxidation in the sewage input sewage aerobic pond of step 3 separated through intermediate sedimentation pond, dirty
Remaining organic matter in water is further oxided decomposition, also forms part biological film sludge, and the ammonia nitrogen in sewage is converted into nitre
Hydrochlorate nitrogen.Sewage a part flows back into anoxic pond after Aerobic Process for Treatment, and a part enters secondary sedimentation tank further progress mud
Water separation.And the sludge of sludge and the secondary sedimentation tank separation separated through intermediate sedimentation pond is in sludge aerobic pond internal oxidition, ammonia nitrogen
It is oxidized to nitrate nitrogen.Sewage aerobic pond becomes a mandarin BOD5About 23mg/L, ammonia nitrogen concentration 8mg/L, nitrate nitrogen concentration are
0.Organic matter is further divided in sewage aerobic pond, and mineralized nitrogen is nitrate nitrogen, therefore flowing water matter is as follows out: BOD5About
10mg/L (removal rate 55%), ammonia nitrogen 75% are oxidized, then ammonia nitrogen concentration is 2mg/L, and nitrate nitrogen concentration is 6mg/L.Sludge
Aerobic tank becomes a mandarin BOD5About 23mg/L, ammonia nitrogen concentration be 19.2mg/L (consider secondary sedimentation tank become a mandarin then be slightly lower than this value,
About 18.3mg/L), nitrate nitrogen concentration is 0.Aerating oxidation in sludge aerobic pond, flows BOD out5About 10mg/L is (in aerobic tank
BOD5Removal rate 55%), ammonia nitrogen about 90% is oxidized, then ammonia nitrogen concentration is 2mg/L, and nitrate nitrogen concentration is 16.3mg/L.
Step 5. excess sludge is discharged out of sludge aerobic pond, due to needing to maintain long sludge age, excess sludge discharge amount phase
Compare general technology to be reduced.In addition, should take appropriate action that reactor is avoided to form dead angle in technique leads to sludgd deposition,
Such as use water jets under high pressure periodic flushing.
Sewage aerobic pond effluent quality is Process for Effluent water quality (secondary sedimentation tank does not consider water quality purification function), then
BOD5About 10mg/L, ammonia nitrogen concentration 2mg/L, nitrate nitrogen concentration are 6mg/L, total nitrogen concentration 8mg/L.It is above calculate according to
Conservative estimation, and the nitrogen removal rate considering reactor nonideality, and generating for mud discharging increases factor and ignores
Disregard, therefore practical water quality can be better than above-mentioned calculated value.Remaining ammonia nitrogen and BOD actually in aerobic tank5Mostly suspended particulate
It is caused, therefore dissolubility BOD5Concentration can be lower than 10mg/L.Being discharged nitrogen removal rate is 84%.
Since nitrogen removal rate of the invention and sludge concentration and sludge absorption performance are highly relevant, therefore improve sludge concentration
It has very important significance with Sludge Property is improved for further increasing nitrogen removal rate.If can be by the sludge of anoxic pond
Concentration is increased to 8000mg/L or more, then total nitrogen theory removal rate may even exceed 90%；If the absorption by sludge to ammonia nitrogen
Ability is increased to 1.0-1.2mg/g, then the theoretical removal rate of total nitrogen can be equally increased to the level close to 90%.And it is traditional
A2/ O technique or AN/ O technique, the theoretical removal rate of total nitrogen are difficult to be increased to 75% or more, and practical removal rate is in most cases
It can be only sustained at 70% or so.Actually the present invention can use improves sludge to ammonia nitrogen as far as possible while high concentration sludge
Absorption property reaches what 90% even higher nitrogen removal rate can be achieved in actual sewage processing engineering.It can also be
The middle section addition of pulling flow type anoxic pond can improve the medicament of Sludge Surface charging performance, add molysite in sewage aerobic pond
Deng to improve the removal rate of total nitrogen and total phosphorus.
The present invention and tradition AN/ O technique or A2/ O technique is compared, and system sludge reflux ratio dramatically increases, about 200-250%
(A2The return sludge ratio 20-100% of/O technique)；And the sewage backflow of system is than significant decrease, about 50-100% (A2/ O technique
Sewage backflow than it is general >=200%).Total reflux ratio can be with traditional AN/ O technique or A2/ O technique is near or below traditional work
Skill increases a possibility that total reflux ratio further increases nitrogen removal rate.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of high-efficiency biological nitrogen and phosphorus removal system of the aerobic shunting based on ammonia nitrogen absorption, which is characterized in that according to water flow side
To, including set gradually anoxic pond, intermediate sedimentation pond, sewage aerobic pond, secondary sedimentation tank, further include be arranged in intermediate sedimentation
Sludge aerobic pond on pond and the sludge reflux path of secondary sedimentation tank.
2. a kind of high-efficiency biological nitrogen and phosphorus removal system of aerobic shunting based on ammonia nitrogen absorption according to claim 1,
It is characterized in that, further includes the anaerobic pond that anoxic pond upstream is set.
3. a kind of high-efficiency biological nitrogen and phosphorus removal system of aerobic shunting based on ammonia nitrogen absorption according to claim 1,
It is characterized in that, the anoxic pond is pulling flow type anoxic pond.
4. a kind of high-efficiency biological nitrogen and phosphorus removal method of the aerobic shunting based on ammonia nitrogen absorption, which is characterized in that step include: by
Treatment sewage passes sequentially through anoxic pond and intermediate sedimentation pond carries out anoxic denitrification and first time precipitation process, heavy by centre
The sewage and sludge of shallow lake pond separation are handled according to different paths respectively, after wherein sludge enters sludge aerobic pond progress aerating oxidation
Be back in the response path of anoxic pond or its upstream, sewage enter sewage aerobic pond carry out Aerobic Process for Treatment after be partly refluxed to it is scarce
Oxygen pond, another part, which enters secondary sedimentation tank, to carry out second being discharged discharge after precipitating, and the sludge in secondary sedimentation tank enters dirt
Mud aerobic tank is back in the response path of anoxic pond or its upstream after carrying out aerating oxidation.
5. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
It is characterized in that, the return sludge ratio of two sedimentation basins adds up to 200-250%, and sewage backflow ratio is 50-100%, sludge and dirt
Total reflux ratio of water is 250-350%.
6. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
It is characterized in that, filler is added in the sewage aerobic pond, and filler is fixed in pond and forms biological film system.
7. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
Be characterized in that, maintaining sludge concentration in anoxic pond is 7000mg/L or more, in sludge aerobic pond sludge concentration be 12000mg/L with
On.
8. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
It is characterized in that, the sludge of control intermediate sedimentation pond separation and the assignment of traffic of sewage are that mud discharge is greater than the discharge of sewage.
9. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
It is characterized in that, the sludge age of sludge is 25-60d in system.
10. a kind of high-efficiency biological nitrogen and phosphorus removal method of aerobic shunting based on ammonia nitrogen absorption according to claim 4,
It is characterized in that, the anoxic pond is pulling flow type anoxic pond, the high-efficiency biological nitrogen and phosphorus removal method further include: in pulling flow type anoxic
The middle section addition in pond can improve the medicament of Sludge Surface charging performance, or add molysite in sewage aerobic pond.
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