CN108341546A - Advanced nitrogen dephosphorization system for handling domestic sewage in rural areas and method - Google Patents

Advanced nitrogen dephosphorization system for handling domestic sewage in rural areas and method Download PDF

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Publication number
CN108341546A
CN108341546A CN201810102333.3A CN201810102333A CN108341546A CN 108341546 A CN108341546 A CN 108341546A CN 201810102333 A CN201810102333 A CN 201810102333A CN 108341546 A CN108341546 A CN 108341546A
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unit
aerobic
anoxic
different levels
water inlet
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Inventor
张冲
王俊安
潘华崟
张鑫阳
温利雪
车昱晓
董智明
郭永
文波
文一波
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Beijing Sound Environmental Engineering Co Ltd
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Beijing Sound Environmental Engineering Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultra-violet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/04Oxidation reduction potential [ORP]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/22O2
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

Abstract

The invention discloses a kind of advanced nitrogen dephosphorization systems and method for handling domestic sewage in rural areas, including:Anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool, sand filter and ultraviolet disinfection pond connected in sequence;Wherein, anaerobic unit is equipped with water inlet manifold and first point of water inlet pipe;The multilevel hierarchy that multi-stage aerobic-anoxic unit is made of multiple aerobic units being arranged alternately and anoxic unit is equipped with aerator in aerobic units at different levels, and aerobic unit bottoms at different levels are respectively provided with sludge pipe;Anoxic units at different levels are equipped with a point water inlet pipe, and anoxic unit bottoms at different levels are respectively provided with sludge pipe;Sedimentation basin passes through the mud return line time equipped with sludge reflux pump and is connected to anaerobic unit;Total outlet pipe is arranged in ultraviolet disinfection pond, further includes that DO is connect with ORP control systems with multi-stage aerobic-anoxic unit, can control the ratio between DO and ORP to control aerobic and anoxic treatment alternately.The system treatment effect and economic performance, have reached the leading level in the world.

Description

Advanced nitrogen dephosphorization system for handling domestic sewage in rural areas and method
Technical field
The invention belongs to sewage disposals and recycling field, and in particular to one kind being used for rural domestic sewage treatment and reuse Advanced nitrogen dephosphorization system and method.
Background technology
For the increasingly serious environmental problem caused by the unprocessed direct emission of domestic sewage in rural areas, various technology groups Process form made of conjunction has been applied in domestic sewage in rural areas improvement, also achieves preferable Nitrogen/Phosphorus Removal.For The treatment process of domestic sewage in rural areas is mainly the following form.
From technological process, it is broadly divided into 4 kinds:(1) " anaerobism+ecology " technique;(2) " aerobic+ecology " technique;(3) " detest Oxygen+aerobic " technique;(4) " anaerobism+aerobic+ecology " technique, ecological process refer to stabilization pond, eco-filtration, artificial swamp, plant more Object ecology canal etc..
From technique way of realization, it is broadly divided into 2 kinds:(1) integration apparatus (buried, ground type, semi-underground type); (2) ecological process, such as:Manually construct wetland, stabilization pond, Aquatic-plant Pond, land treatment systems etc..Ecological process is mostly depth Reason uses, i.e., is being used after two stage treatment.
From technological principle, the denitrogenation of (1) domestic sewage in rural areas mainly utilizes bioanalysis to remove, that is, utilizes activated sludge Or the microorganism in biomembrane completes the removal of nitrogen in sanitary sewage by ammoniation, nitrification, denitrification, about Often the NH3-N of removal 1g needs 4.2gO2, needs 7.15g basicity (CaCO3 meters), being of nitrobacteria can be from oxygen bacterium, denitrification Bacterium is to change energy heterotrophic bacteria, and nitrifying process does not need carbon source, and denitrification process also needs carbon source.(2) dephosphorization of domestic sewage in rural areas It is mostly completed by biological phosphate-eliminating or chemical dephosphorization, supplement of the chemical dephosphorization mainly as biological phosphate-eliminating.Chemical dephosphorization is by adding Then medicament, the calcium phosphate precipitation object being variously formulated realize the removal of phosphorus by separation of solid and liquid.Biological phosphate-eliminating is mainly profit It is completed by anaerobic phosphorus release and aerobic phosphorous accumulating with the corresponding microorganism in activated sludge.PolyP bacteria and release the different oxygen of phosphorus bacterium being energy Microorganism, poly- phosphorus are both needed to consumption carbon source with phosphorus process is released.
However, to reach higher denitrification effect, it is necessary to it is carried out at the same time sludge reflux and increases the interior reflux of nitrification liquid, it is past Toward additional carbon and supplement basicity is also needed to, power, the reagent consumption of technique are increased, the cost of O&M is increased.In addition, poly- Phosphorus process and nitrification, denitrification and phosphorus process is released due to the different physiological properties of the microorganism respectively needed, also deposit Mutually restraining, influencing each other, problem above becomes the main problem that current domestic sewage in rural areas advanced nitrogen dephosphorization faces.
Invention content
Based on the problems of prior art, the object of the present invention is to provide a kind of for handling domestic sewage in rural areas Advanced nitrogen dephosphorization system and method, it is efficient, energy saving, save land, is economic and practical, it can efficient process villages and small towns sewage.
The purpose of the present invention is what is be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of advanced nitrogen dephosphorization system for handling domestic sewage in rural areas, including:
Anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool, sand filter ultraviolet disinfection pond and DO and ORP are controlled System processed;Wherein,
The anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool and sand filter ultraviolet disinfection pond sequentially connect It connects;
The anaerobic unit is equipped with water inlet manifold and first point of water inlet pipe;
The multistage knot that the multi-stage aerobic-anoxic unit is made of multiple aerobic units being arranged alternately and anoxic unit Structure is equipped with aerator in aerobic units at different levels, and aerobic unit bottoms at different levels are respectively provided with sludge pipe;Anoxic units at different levels are all provided with There are a point water inlet pipe, anoxic unit bottoms at different levels to be respectively provided with sludge pipe;
The sedimentation basin passes through the mud return line time equipped with sludge reflux pump and is connected to the anaerobic unit;
Total outlet pipe is arranged in the ultraviolet disinfection pond;
The DO is connect with ORP control systems with the multi-stage aerobic-anoxic unit, can control the ratio between DO and ORP to control The Aerobic Process for Treatment and anoxic treatment alternately of the multi-stage aerobic-anoxic unit.
Embodiment of the present invention also provides a kind of advanced nitrogen phosphorus removing method for handling domestic sewage in rural areas, using this The invention advanced nitrogen dephosphorization system for handling domestic sewage in rural areas, includes the following steps:
Water inlet manifold and first point water inlet water inlet tube of the handled sewage respectively through the system are carried out to anaerobic unit Anaerobic Treatment, the multi-stage aerobic-anoxic unit that the water outlet after Anaerobic Treatment enters the system carry out alternate Aerobic Process for Treatment successively And anoxic treatment, the water outlet after multi-stage aerobic-anoxic cell processing sequentially enter sedimentation basin, intermediate pool, sand filter and ultraviolet disappear Malicious pond carries out outer row after precipitation process, sand filtration filtering and ultraviolet disinfection are handled;
In the processing procedure, it is good to control the multistage that the ratio between DO and ORP are controlled by the DO and ORP control systems The Aerobic Process for Treatment and anoxic treatment alternately of oxygen anoxic unit;Wherein, the first order, second level aerobic unit DO are controlled and are The water outlet DO controls of 0.5mg/L or more, third level aerobic unit are 2~4mg/L;The ORP controls of anoxic units at different levels are -300 ~+100mv;
In the processing procedure, the anoxic units at different levels using each point of water inlet pipe for the multi-stage aerobic-anoxic unit provide Basicity and carbon source carry out supplementary carbon source and basicity in a manner of flow to adjust;
In the processing procedure, the anoxic units at different levels of the multi-stage aerobic-anoxic unit are controlled by upflow velocity, living Property sludge be in suspension, pass through hydraulic action carry out anaerobism, anoxic unit mixing agitation;
In the processing procedure, aerator is carried out to the aerobic units at different levels of the multi-stage aerobic-anoxic unit, to heavy Time control is arranged to the sludge reflux pump of anaerobic unit returned sludge in shallow lake pond;
In the processing procedure, pass through aerobic, anoxic unit connection the spoil disposals at different levels of the multi-stage aerobic-anoxic unit Pipe carries out spoil disposal.
As seen from the above technical solution provided by the invention, provided in an embodiment of the present invention for handling life in the countryside The advanced nitrogen dephosphorization system and method for sewage, advantage are:
Good sewage processing effect strengthens domestic sewage denitrifying-dephosphorizing effect by the culture of each functional unit dominant bacteria, Dirty Organic substance in water may be implemented, particularly nitrogen, Phosphorus pollutant efficiently remove;Traditional denitrification dephosphorization technique is compared, is not required to Anaerobism, the mechanical agitation of anoxic unit are wanted, does not need nitrification liquid reflux, aerator is according to DO/ORP situations, intermittent aerating, section About power consumption, operating cost is low;The system is designed using integrated module, high degree of automation, and management service is convenient.It is comprehensive Upper described, system and method treatment effect of the invention and economic performance have reached the leading level in the world.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is that advanced nitrogen dephosphorization system provided in an embodiment of the present invention constitutes figure;
In figure:1- anaerobic units;2- first order aerobic units;3- first order anoxic units;The second level 4- aerobic unit;5- Second level anoxic unit;6- third level aerobic units;7- sedimentation basins;8- intermediate pools;9- sand filters;10- ultraviolet disinfections pond; 11- water inlet manifolds;12- total outlet pipes;13- first divides water inlet pipe;14- second divides water inlet pipe;15- thirds divide water inlet pipe;16- One aerator;The second aerators of 17-;18- third aerators;The first sludge pipes of 19-;The second sludge pipes of 20-;21- Three sludge pipes;The 4th sludge pipes of 22-;The 5th sludge pipes of 23-;24- mud return lines.
Specific implementation mode
With reference to the particular content of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, Belong to protection scope of the present invention.The content not being described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field The well known prior art.
As shown in Figure 1, the embodiment of the present invention provides a kind of advanced nitrogen dephosphorization system for handling domestic sewage in rural areas, Be it is a set of tally with the national condition, be efficient, is energy saving, saving land, is technologically advanced, economic and practical villages and small towns sewage disposal system, including:
Anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool, sand filter ultraviolet disinfection pond and DO and ORP are controlled System processed;Wherein,
The anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool and sand filter ultraviolet disinfection pond sequentially connect It connects;
The anaerobic unit is equipped with water inlet manifold and first point of water inlet pipe;
The multistage knot that the multi-stage aerobic-anoxic unit is made of multiple aerobic units being arranged alternately and anoxic unit Structure is equipped with aerator in aerobic units at different levels, and aerobic unit bottoms at different levels are respectively provided with sludge pipe;Anoxic units at different levels are all provided with There are a point water inlet pipe, anoxic unit bottoms at different levels to be respectively provided with sludge pipe;
The sedimentation basin passes through the mud return line time equipped with sludge reflux pump and is connected to the anaerobic unit;
Total outlet pipe is arranged in the ultraviolet disinfection pond;
The DO is connect with ORP control systems with the multi-stage aerobic-anoxic unit, can control the ratio between DO and ORP to control The Aerobic Process for Treatment and anoxic treatment alternately of the multi-stage aerobic-anoxic unit..
In above-mentioned advanced nitrogen dephosphorization system, multi-stage aerobic-anoxic unit includes:
First order aerobic unit, first order anoxic unit, second level aerobic unit, second level anoxic unit and the third level are good Oxygen unit;Wherein,
It is respectively provided with aerator in the first order aerobic unit, second level aerobic unit and third level aerobic unit, i.e., First, second, and third aerator, aerobic unit bottoms at different levels are respectively provided with sludge pipe, i.e., first, third, the 5th sludge pipe;
Second point of water inlet pipe is arranged in the first order anoxic unit, and second point of water inlet is arranged in the second level anoxic unit Pipe, the first order anoxic unit and second level anoxic unit bottom are respectively provided with sludge pipe, i.e., and second, the 4th sludge pipe.
Above-mentioned advanced nitrogen dephosphorization system further includes:Sequentially connected grid pretreatment unit and regulating reservoir, the adjusting The water outlet in pond is connect with the water inlet manifold and first, second, third point of water inlet pipe respectively.
In above-mentioned advanced nitrogen dephosphorization system, biologic packing material, the life in every grade of aerobic unit are set in aerobic units at different levels Object filler packing ratio is not higher than 40%, and biologic packing material uses SNP suspension biologic fillers, each by being fixedly mounted on after connection of restricting In grade aerobic unit.Patent document ZL93217017.X can be used in SNP suspension biologic fillers, and what is provided in 95200192.6 fills out Material.Biologic packing material is not provided in anoxic unit.
In above-mentioned advanced nitrogen dephosphorization system, the sludge pipe of each unit connection is all made of air lift sludge pipe.
Above-mentioned advanced nitrogen dephosphorization, has the following advantages:
(1) by the way that multistage anaerobism, anoxic, aerobic unit is arranged, each processing unit is spatially alternately arranged, and passes through control DO the parameters such as ORP realize that wherein anaerobic unit main function provides place to release phosphorus process, and anoxic unit main function is Denitrification provides place, and aerobic unit mainly realizes the removal of nitrification and carbon.Multistage setting avoids denitrifying bacterium and gathers Phosphorus bacterium to the competing raw relationship of the competition of substrates, nitrobacteria and carbon removal bacterium, carbon removal bacterium and the competing raw relationship for releasing phosphorus bacterium, Each processing unit culture dominant bacteria completes nitrification, denitrification, releases the processes such as phosphorus, poly- phosphorus, realized in spatial distribution stage by stage Culture, enrichment and the more efficient treatment effect of dominant bacteria.
(2) in order to avoid additional carbon, the supplement of basicity, avoid each microorganism species for the competition of substrates, from Regulating reservoir send water to each denitrification, suction phosphorus process unit respectively, provides basicity and carbon source for each processing unit using water inlet, passes through Flow-rate adjustment realizes suitable carbon source, basicity magnitude of recruitment, while also achieving each functional unit dominant bacteria by means of which Culture.
(3) in order to further strengthen the culture of each functional unit dominant bacteria, enhancement unit treatment effect is given birth to by being arranged Object filler, biologic packing material packing ratio about 40%, biologic packing material use SNP suspension biologic fillers, are pacified by fixed after connection of restricting In aerobic units at different levels.SNP suspension biologic fillers can be used in patent document ZL93217017.X, 95200192.6 to The filler gone out forms the hybrid technique of activated sludge and biomembrane.By biologic packing material by the dominant bacteria of each processing unit culture Group is cultivated, is enriched with, and realizes the separation of hydraulic detention time and sludge age, specific processing unit is trained with advantage Nitrification or decarburization or poly- phosphorus or release phosphorus or denitrification function unit, intensified denitrification and dephosphorization effect.
(4) each anoxic section is controlled by upflow velocity, and activated sludge is in suspension, is realized anaerobism by hydraulic action, is lacked The mixing of oxygen section stirs, and does not need power-equipment, while also further maintaining each dominant bacteria retaining in each functional unit, The microorganism of the part to flow away not free settling supplements the sludge concentration of each unit again in precipitation unit by sludge reflux, this It has been greatly reduced sludge reflux amount, has saved power consumption;By this technique by decarburization, nitrification, denitrification, release phosphorus, poly- phosphorus Function distinguishing is carried out, nitrification liquid reflux is not needed, does not need power-equipment, arrangement above has saved power consumption, reduces dress The operating cost set.
(5) time control is arranged to aerator, sludge reflux pump, it is such that the DO/ for further enhancing anoxic section is set ORP control, for prevent aerobic section DO too high or too low for follow-up anoxic section anaerobic condition adverse effect, play more Further protection act on, while also avoid device cross aeration caused by sludge character it is loose, the loss of dominant microflora.This Sample, there is also a DO concentration gradient, efficient denitrification dephosphorization functions preferably for each functional unit in time.
(6) air lift mud line is respectively set in each functional unit, dense according to the microbiologic properties of each functional unit, sludge Degree, treatment effect etc. realize the discharge of the excess sludge of each functional unit activated sludge part, accomplish fine spoil disposal, such as nitre Change unit and need longer sludge age, then reducing its sludge volume, even spoil disposal, decarburization unit are not needed comparatively fast due to microorganism growth Want regular spoil disposal.
The embodiment of the present invention also provides a kind of advanced nitrogen phosphorus removing method for handling domestic sewage in rural areas, and use is above-mentioned For handling the advanced nitrogen dephosphorization system of domestic sewage in rural areas, include the following steps:
Water inlet manifold and first point water inlet water inlet tube of the handled sewage respectively through the system are carried out to anaerobic unit Anaerobic Treatment, the multi-stage aerobic-anoxic unit that the water outlet after Anaerobic Treatment enters the system carry out alternate Aerobic Process for Treatment successively And anoxic treatment, the water outlet after multi-stage aerobic-anoxic cell processing sequentially enter sedimentation basin, intermediate pool, sand filter and ultraviolet disappear Malicious pond carries out outer row after precipitation process, sand filtration filtering and ultraviolet disinfection are handled;
In the processing procedure, the ratio between DO and ORP are controlled by DO and ORP control systems and lacked to control the multi-stage aerobic The Aerobic Process for Treatment and anoxic treatment alternately of oxygen unit;Specifically, aerobic, anoxic unit per level-one, are respectively provided with online DO and ORP probes seperated can carry out Display panel in master control cabinet, if project automation itself requires height that can be arranged and wind turbine Or intake valve interlocking.Under normal circumstances, mainly for the domestic sewage in rural areas of small water, automation requires relatively low such equipment. These instrument can be installed, but need not realize equipment interlocking control.By the Real time displaying of instrument, unit of operation can periodic adjustment it is each Unit intake valve ensures each unit stable operation.Aerobic unit is controlled by DO in 0.5~4mg/L, anoxic unit ORP controls In -300mv~+100mv, concrete implementation mode is the time control and air inlet pipe valve aperture regulation of wind turbine.
In the processing procedure, the anoxic units at different levels using each point of water inlet pipe for the multi-stage aerobic-anoxic unit provide Basicity and carbon source carry out supplementary carbon source and basicity in a manner of flow to adjust;Specifically, debugging initial stage, influent quality and each Biochemical treatment unit (aerobic/anoxic) water outlet of grade is detected, and index includes:COD, ammonia nitrogen, total nitrogen, total phosphorus.According to life The requirement of object denitrogenation, COD:N:P is controlled 300~500:5:1, it is returned according to influent quality after calculating return water amount, passes through regulating valve (electricity It is dynamic) valve opening adjusting is carried out, guarantee is at different levels enough carbon source or basicity.Periodic detection water quality during operation, can suitably into Row valve opening is adjusted;
In the processing procedure, the anoxic units at different levels of the multi-stage aerobic-anoxic unit are controlled by upflow velocity, living Property sludge be in suspension, pass through hydraulic action carry out anaerobism, anoxic unit mixing agitation;
In the processing procedure, aerator is carried out to the aerobic units at different levels of the multi-stage aerobic-anoxic unit, to heavy Time control is arranged to the sludge reflux pump of anaerobic unit returned sludge in shallow lake pond;The control of reflux flows back to sludge, anaerobism, Anoxic partial sludge the factors such as is not good at possibly into sedimentation basin due to variation water quality, control, need to this partial sludge into Row reflux, at the same the setting of reflux pump another major reason be realize the adjusting of anoxic tank upflow velocity, though intaking can adjust It saves but variation water quality easily occurs.Reflux pump controls return time by the time relay, realizes the control of regurgitant volume.Due at different levels Unit is that individually control, sludge quantity may cause sludge quantity to reduce, pass through the reflux of sludge due to running problem, it is ensured that Sludge concentration in each unit ensures effluent quality.
In the processing procedure, pass through aerobic, anoxic unit connection the spoil disposals at different levels of the multi-stage aerobic-anoxic unit Pipe carries out spoil disposal.
The embodiment of the present invention is specifically described in further detail below.
As shown in Figure 1, the present embodiment provides a kind of advanced nitrogen dephosphorization system for handling domestic sewage in rural areas, In, anaerobic unit is a functional unit with multi-stage aerobic-anoxic unit, can suitably be increased according to water water, water quality and be added deduct It is few;Further, which also sets up front grill pretreatment unit, regulating reservoir is pretreatment section common process, originally shows Intention is not shown.
The major function of each unit is as follows:
(1) first order anaerobic unit:It is substantially carried out the water of anaerobic phosphorus release, the removal of partial organic substances, larger molecular organics Solution reaction etc., this functional unit keeps anaerobic environment, and nitrate nitrogen content is low, and matrix is sufficient, and releasing phosphorus bacterium becomes dominant bacteria, herein Functional unit, microorganism can concentrate and release phosphorus.
(2) first order aerobic unit:It is substantially carried out the absorption and degradation of COD type organics, due to the hydrolysis of anaerobic unit Effect, substrate degradation are more prone to, and the COD removal rates in this stage carry out part nitrification up to 90%, but due to organic Object concentration is higher, is unfavorable for the breeding of nitrobacteria, this stage nitrification is not fully.
(3) first order anoxic unit:It is substantially carried out anti-nitration reaction, since denitrifying bacteria is compared, to release phosphorus bacterium more surging, This stage is mainly denitrifying bacterium generates nitrogen using the nitrate nitrogen reaction in sewage, but since nitrification is incomplete, this rank Section removal part total nitrogen.
(4) second level aerobic unit:It is substantially carried out nitration reaction and aerobic phosphorus absorption, very due to this section of organic concentration Low, nitrobacteria becomes dominant microflora, concentrates and carries out nitration reaction, and the ammonia nitrogen in sewage is generated nitrogen by nitration reaction, Realize the removal of most of total nitrogen.
(5) second level anoxic unit:It is substantially carried out anti-nitration reaction, the nitrate nitrogen reaction in sewage is generated into nitrogen.
(6) third level aerobic unit:It is substantially carried out aerobic phosphorus absorption effect, nitration reaction, rest COD pollutant are gone It removes, ensures final effluent quality.
Embodiment
The present embodiment provides a kind of for handling the advanced nitrogen dephosphorization system of domestic sewage in rural areas, handled by life The design water of sewage is:100m3/ d, design influent quality are as shown in table 1:
1 sanitary sewage influent quality list of table
The specific processing step of mostly above-mentioned sewage is as follows:
(1) it pre-processes:Bulky grain suspended matter in sewage is removed by grid pretreatment unit, after floating material, life is dirty Water enters regulating reservoir, is measured homogeneous, ensures subsequent biochemical processing system water, the equilibrium of water quality, stabilization;
(2) advanced nitrogen dephosphorization is handled:In step (1) advanced nitrogen dephosphorization system will be sent by pretreated sewage In, in the system by the modes such as equipment lattice, DO/ORP controls, aeration time control realize anaerobism that each lattice needs, Aerobic, anaerobic condition, each lattice are a functional process unit;Sewage is advanced in every compartment plug-flow, and in every lattice Equipped with biologic packing material, cooperation or anaerobism or anoxic or aerobic environment pass through the measures such as multipoint water feeding, air lift spoil disposal, cultivate advantage Flora, and carry out decarburization between each lattice, nitrification, denitrification, release phosphorus, inhale the biochemical processes such as phosphorus, realize that the denitrogenation of sewage removes Phosphorus requirement.Biologic packing material is arranged between each lattice, Activated sludge-biofilm being capable of enriching section preponderant functional bacteria by biologic packing material Group realizes the separation of sludge age and hydraulic detention time;Meanwhile the lattice in anaerobism, anaerobic condition, make all of waterpower With being stirred, it is not provided with power plant, activated sludge part therein is in suspended state, and only top clear water flows out, and enters Next functional unit is reacted, and has retained the activated sludge in each lattice to the greatest extent in this way, is prevented excellent in each lattice The loss of gesture flora;Sewage carries out mud-water separation into precipitation unit, precipitates after last multistage lattice functional unit Sludge be pumped back to anaerobic unit, keep system entirety sludge concentration, clear water then to enter advanced treatment unit;
(3) advanced treating:Sewage in step (2) Jing Guo main process task further goes to decontaminate by sand filtration and ultraviolet disinfection Suspended particulate substance in water and the processing that carries out disinfection, make up in line or reuse standard.
It is as shown in table 2 by treated effluent quality:
2 sanitary sewage effluent quality list of table
The method of the present invention is compared with existing villages and small towns sewage treatment process method, with integrated advanced nitrogen dephosphorization system Based on system, rely on Microbial denitrogenation dephosphorization principle, to sanitary sewage carry out deeper into decarburization dephosphorization handle, meet some rings The effluent quality requirement of border sensitizing range.
It has the advantages that:(1) good sewage processing effect is strengthened by the culture of each functional unit dominant bacteria Domestic sewage denitrifying-dephosphorizing effect, may be implemented dirty Organic substance in water, particularly nitrogen, Phosphorus pollutant efficiently remove;(2) it compares Traditional denitrification dephosphorization technique does not need anaerobism, the mechanical agitation of anoxic unit, does not need nitrification liquid reflux, aerator root According to DO/ORP situations, intermittent aerating has saved power consumption, and operating cost is low;(3) system is designed using integrated module, High degree of automation, management service are convenient.In conclusion the system and method treatment effect and economic performance of the present invention, reach The leading level in the world is arrived.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in, It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Subject to enclosing.

Claims (8)

1. a kind of advanced nitrogen dephosphorization system for handling domestic sewage in rural areas, which is characterized in that including:
Anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool, sand filter ultraviolet disinfection pond and DO and ORP controls are System;Wherein,
The anaerobic unit, multi-stage aerobic-anoxic unit, sedimentation basin, intermediate pool and sand filter ultraviolet disinfection pond are sequentially connected with;
The anaerobic unit is equipped with water inlet manifold and first point of water inlet pipe;
The multilevel hierarchy that the multi-stage aerobic-anoxic unit is made of multiple aerobic units being arranged alternately and anoxic unit, respectively It is equipped with aerator in grade aerobic unit, aerobic unit bottoms at different levels are respectively provided with sludge pipe;Anoxic units at different levels are equipped with point Water inlet pipe, anoxic unit bottoms at different levels are respectively provided with sludge pipe;
The sedimentation basin passes through the mud return line time equipped with sludge reflux pump and is connected to the anaerobic unit;
Total outlet pipe is arranged in the ultraviolet disinfection pond;
The DO is connect with ORP control systems with the multi-stage aerobic-anoxic unit, and it is described to control to control the ratio between DO and ORP The Aerobic Process for Treatment and anoxic treatment alternately of multi-stage aerobic-anoxic unit.
2. the advanced nitrogen dephosphorization system according to claim 1 for handling domestic sewage in rural areas, which is characterized in that institute Stating multi-stage aerobic-anoxic unit includes:
First order aerobic unit, first order anoxic unit, second level aerobic unit, second level anoxic unit and the aerobic list of the third level Member;Wherein,
It is respectively provided with aerator, Ge Jihao in the first order aerobic unit, second level aerobic unit and third level aerobic unit Oxygen unit bottom is respectively provided with sludge pipe;
Second point of water inlet pipe is arranged in the first order anoxic unit, and second point of water inlet pipe, institute is arranged in the second level anoxic unit It states first order anoxic unit and is respectively provided with sludge pipe with second level anoxic unit bottom.
3. the advanced nitrogen dephosphorization system according to claim 1 for handling domestic sewage in rural areas, which is characterized in that also Including:Sequentially connected grid pretreatment unit and regulating reservoir, the water outlet of the regulating reservoir respectively with the water inlet manifold and First, second, third point of water inlet pipe connection.
4. the advanced nitrogen dephosphorization system according to claim 1 or 2 for handling domestic sewage in rural areas, feature exists In aerobic units at different levels are interior to be arranged biologic packing material, and the biologic packing material packing ratio in every grade of aerobic unit is not higher than 40%, and biology is filled out Material uses SNP suspension biologic fillers, by being fixedly mounted in aerobic units at different levels after connection of restricting.
5. the advanced nitrogen dephosphorization system according to claim 1 or 2 for handling domestic sewage in rural areas, feature exists In in the system, the sludge pipe of each unit connection is all made of air lift sludge pipe.
6. the advanced nitrogen dephosphorization system according to claim 1 or 2 for handling domestic sewage in rural areas, feature exists In the DO and ORP control systems include:Master control set, multigroup online DO devices and multiple ORP probes;Wherein,
Multigroup online DO devices set up separately in the aerobic units at different levels of the multi-stage aerobic-anoxic unit;
The multiple ORP probes set up separately in the anoxic units at different levels of the multi-stage aerobic-anoxic unit;
The master control set is electrically connected with multigroup online DO devices and multiple ORP probes respectively, can control DO and ORP it Than controlling the Aerobic Process for Treatment and anoxic treatment alternately of the multi-stage aerobic-anoxic unit.
7. a kind of advanced nitrogen phosphorus removing method for handling domestic sewage in rural areas, which is characterized in that use claim 1 to 6 Any one of them is used to handle the advanced nitrogen dephosphorization system of domestic sewage in rural areas, includes the following steps:
Water inlet manifold and first point water inlet water inlet tube of the handled sewage respectively through the system carry out anaerobism to anaerobic unit It handles, the multi-stage aerobic-anoxic unit that the water outlet after Anaerobic Treatment enters the system carries out alternate Aerobic Process for Treatment and lacks successively Oxygen is handled, and the water outlet after multi-stage aerobic-anoxic cell processing sequentially enters sedimentation basin, intermediate pool, sand filter and ultraviolet disinfection pond Carry out outer row after precipitation process, sand filtration filtering and ultraviolet disinfection are handled;
In the processing procedure, the ratio between DO and ORP are controlled by the DO and ORP control systems and lacked to control the multi-stage aerobic The Aerobic Process for Treatment and anoxic treatment alternately of oxygen unit;Wherein, the first order, second level aerobic unit DO are controlled and are The water outlet DO controls of 0.5mg/L or more, third level aerobic unit are 2~4mg/L;The ORP controls of anoxic units at different levels are -300 ~+100mv;
In the processing procedure, the anoxic units at different levels using each point of water inlet pipe for the multi-stage aerobic-anoxic unit provide basicity And carbon source, supplementary carbon source and basicity are carried out in a manner of flow to adjust;
In the processing procedure, the anoxic units at different levels of the multi-stage aerobic-anoxic unit are controlled by upflow velocity, and activity is dirty Mud is in suspension, carries out anaerobism by hydraulic action, the mixing of anoxic unit stirs;
In the processing procedure, aerator is carried out to the aerobic units at different levels of the multi-stage aerobic-anoxic unit, to sedimentation basin To the sludge reflux pump of anaerobic unit returned sludge, time control is set;
In the processing procedure, by the sludge pipes of aerobic, the anoxic units connections at different levels of the multi-stage aerobic-anoxic unit into Row spoil disposal.
CN201810102333.3A 2018-02-01 2018-02-01 Advanced nitrogen dephosphorization system for handling domestic sewage in rural areas and method Pending CN108341546A (en)

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Application publication date: 20180731