CN106242054A - The sewage disposal system of a kind of suitching type intermittent aerating and processing method - Google Patents
The sewage disposal system of a kind of suitching type intermittent aerating and processing method Download PDFInfo
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- CN106242054A CN106242054A CN201610763555.0A CN201610763555A CN106242054A CN 106242054 A CN106242054 A CN 106242054A CN 201610763555 A CN201610763555 A CN 201610763555A CN 106242054 A CN106242054 A CN 106242054A
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- reaction
- aeration
- sedimentation tank
- sewage
- disposal system
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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
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses sewage disposal system and the processing method of a kind of suitching type intermittent aerating, sewage disposal system includes: cell body, including reaction tank, sedimentation tank and dividing plate, forming reaction cavity between sedimentation tank and reaction tank, reaction cavity is divided into two reaction zones by dividing plate；It is located at the water decanter of reaction zone；The water inlet pipe connected with sedimentation tank；Aerator, including Aeration fan, three-way valve, aeration tube；Processing method enters in reaction tank for being passed through sewage to overflow in sedimentation tank, and two reaction zones alternative aeration makes two reaction zones alternately short distance nitration, stands water outlet.Sedimentation tank is built in reaction tank by one aspect of the present invention, and it is separated to form two reaction zones by dividing plate, it is conducive to sewage to carry out anaerobism, Aerobic Process for Treatment successively, improve sewage treating efficiency, on the other hand alternately two reaction zones is carried out aeration by control three-way valve, it is conducive to two reaction zones alternately short distance nitration to react, and improves reaction efficiency, reduces energy resource consumption.
Description
Technical field
The present invention relates to sewage disposal technology, especially relate to sewage disposal system and the place of a kind of suitching type intermittent aerating
Reason method.
Background technology
Traditional sequencing batch active sludge has SBR (Sequence Batch Reactor) method and the deformation of SBR method to be formed
Periodic activity sludge CASS (Cyclical Actived Sludge System).
SBR is the abbreviation of sequencing batch active sludge, is a kind of activated sludge sewage run by intermittent aerating mode
Treatment technology.Its orderly and intermittently operated being mainly characterized by operationally, the core of SBR technology is sbr reactor pond, this pond
Collect homogenizing, just heavy, biodegradation, two functions such as heavy in a pond, without sludge recirculation system.It is particularly suited for intermittent discharge and flow
The occasion changed greatly.It is widely used at home at present.Water decanter is a key equipment of this method.Operationally, exist
In one reaction pool (device), SBR method is in chronological order by water inlet, aeration, precipitation, draining and standby five basic working procedure groups
Become.
CASS (Cyclic Activated Sludge System) is the abbreviation of cyclic activated sludge system, is also called
Circulating active sludge technique CAST (Cyclic Activated Sludge technology), is to develop on the basis of SBR
Getting up, i.e. in SBR pond, water inlet end adds a biological selector, it is achieved that (precipitation phase, drainage period still connect continuum micromeehanics
Continuous water inlet), intermittent drainage.The main purpose arranging biological selector is to make Systematic selection go out flocculability antibacterial, and its volume accounts for
The 10% of whole pond.The technical process of biological selector follows the Matrix accumulation of activated sludge--renewal theory, and make activity dirty
Mud experiences the absorption phase (Matrix accumulation) of a high load capacity in selector, experiences a relatively underload subsequently in main reaction region
The substrate degradation stage, to complete the overall process of whole substrate degradation and mud regeneration.
CASS basic structure is: on the basis of sequencing batch active sludge (SBR), reaction tank is designed as along pond length direction
Two parts, front portion is also referred to as pre-reaction zone for biological selecting area, and rear portion is main reaction region, and its rear portion, main reaction region is mounted with liftable
Automatically skim water device.Process cycle circular flows in same pond such as the aeration of whole technique, precipitation, draining, eliminate
The second pond of conventional activated sludge method and sludge recirculation system；Simultaneously can continuum micromeehanics, be interrupted draining.
CASS principle: in pre-reaction zone, microorganism can be by portion big in the fast transfer mechanism rapid adsorption sewage of enzyme
Point dissolved organic matter, the substrate Rapid Accumulation process of one high load capacity of experience, this is to influent quality, the water yield, PH and poisonous has
Pest matter plays preferable cushioning effect, hyphomycetic growth is played inhibitory action simultaneously, can effectively prevent sludge bulking；With
After main reaction region experience one relatively underload substrate degradation process.Cyclic activated sludge system collects reaction, precipitation, draining, function in one
Body, the degraded of pollutant is a plug-flow process in time, and microorganism is then in aerobic, anoxia, anaerobism cyclically-varying
Among, thus reach, to pollutant removal effect, the most also there is preferable denitrogenation, phosphorus removal functional.
Along with the continuous progress of sewage disposal technology, also occur in that at sequencing batch active sludge and loop cycle activity dirty
Further improvement on the basis of mud method, but above-mentioned improvement technique all exists, and aeration energy consumption is big, big the lacking of weak effect, floor space
Fall into.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, propose the sewage disposal system of a kind of suitching type intermittent aerating
And processing method, solve the technology that in prior art, in sewage disposal process, aeration energy consumption is big, weak effect, floor space are big and ask
Topic.
For reaching above-mentioned technical purpose, technical scheme provides the sewage disposal system of a kind of suitching type intermittent aerating
System, including,
Cell body, it include reaction tank, sedimentation tank and dividing plate, described sedimentation tank be built in reaction tank and and reaction tank between shape
Reaction cavity circlewise, described dividing plate is built in reaction cavity and reaction cavity is separated into two reaction zones；
It is built in two water decanter of two reaction zones respectively；
The water inlet pipe connected with described sedimentation tank；
Aerator, the three-way valve being connected with the outlet side of Aeration fan including Aeration fan, respectively with the two of three-way valve
Two aeration tubes of individual outlet side connection, two described aeration tubes are built in bottom two described reaction zones respectively.
Preferably, described aerator also includes one for controlling the control of described two aeration tubes of three-way valve alternate communication
Device.
Preferably, described aeration tube includes an aeration master arranging along reaction zone length direction and connecting with described three-way valve
Pipe and the multiple aerations all connected with described aeration supervisor are in charge of, and the length direction that multiple aerations are in charge of along aeration supervisor is uniformly arranged
Row arrange, and each aeration be in charge of all with described aeration be responsible for be vertically arranged.
Preferably, described sewage disposal system also includes two reflux pumps being built in described sedimentation tank, two reflux pumps
Water inlet end connect with two reaction zones respectively.
Preferably, described reflux pump and water decanter are arranged respectively close to the two ends of reaction zone.
Preferably, described water decanter includes,
Two guide rods be arrangeding in parallel, two described lower end of the guide rod are both secured to bottom described reaction zone；
Carrier cylinder, described carrier cylinder two ends are slidably connected with two described guide rods respectively and can be relative described
Guide rod slides up and down, and is provided with multiple sorting hole on described carrier cylinder；
The delivery hose being connected with the water side of described carrier cylinder, the water side of described delivery hose through described instead
Answer pond sidewall and be connected with a control valve；And
Being set in parallel in the floating drum above described carrier cylinder, described floating drum is by connector and described carrier cylinder
Connect.
Preferably, described water decanter also includes upper limit bar setting up and down and lower limit bar, described upper limit bar and under
Gag lever post two ends are connected with two guide rods respectively, and described carrier cylinder is arranged between upper limit bar and lower limit bar.
Preferably, described water decanter includes a connection short tube and a position-limiting tube, described connection short tube one end and one of them
Described guide rod is slidably connected, the other end is connected with described carrier cylinder, and described position-limiting tube and described heavy pipe connect into outside one
It is placed on the ring pipe of guide rod described in other in which.
Meanwhile, the present invention also provides for the sewage water treatment method of a kind of above-mentioned sewage disposal system, comprises the steps,
(1) being passed through sewage in sedimentation tank by water inlet pipe, sewage is by entering bottom sedimentation tank and carrying out in sedimentation tank
Precipitation；
(2) sewage is by sedimentation tank overflow to two reaction zones, then carries out aeration by aerator, and controls threeway
Valve alternately connects with two aeration tubes and replaces two reaction zones aeration respectively, replaces into short distance nitration in making two reaction zones
Reaction；
(3), after reaction zone biochemical reaction completes, stand and pass through water decanter water outlet.
Preferably, described step (2) also includes bottom sewage backflow in reaction zone to sedimentation tank.
Compared with prior art, sedimentation tank is built in reaction tank by one aspect of the present invention, and is separated to form two by dividing plate
Individual reaction zone, it is conducive to sewage to carry out anaerobism, Aerobic Process for Treatment successively, improves sewage treating efficiency, on the other hand by control
Three-way valve processed alternately carries out aeration to two reaction zones, and it is conducive to two reaction zones alternately short distance nitration to react, and improves
Reaction efficiency, reduce energy resource consumption.
Accompanying drawing explanation
Fig. 1 is the attachment structure schematic diagram of the sewage disposal system of the suitching type intermittent aerating of the present invention；
Fig. 2 is the attachment structure schematic diagram of the water decanter of the present invention；
Fig. 3 is the A portion enlarged drawing of Fig. 2 of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Refer to Fig. 1～3, The embodiment provides the sewage disposal system of a kind of suitching type intermittent aerating, bag
Include,
Cell body 1, it include reaction tank 11, sedimentation tank 12 and dividing plate 13, described sedimentation tank 12 be built in reaction tank 11 and with
Forming ring-type reaction cavity between reaction tank 11, described dividing plate 13 is built in reaction cavity and reaction cavity is separated into two
Reaction zone；
It is built in two water decanter 2 of two reaction zones respectively；
The water inlet pipe 3 connected with described sedimentation tank 12；
Aerator 4, the three-way valve 42 being connected including the outlet side of Aeration fan 41 with Aeration fan 41, respectively with three
Two aeration tubes 43 of two outlet side connections of logical valve 42, two described aeration tubes 43 are built in two described reaction zones respectively
Bottom.
The sewage disposal system of the present embodiment can use activated sludge process to process sewage, and specially sewage is the most logical
Cross water inlet pipe 3 and enter in sedimentation tank 12, owing to the water side of water inlet pipe 3 may be disposed at bottom sedimentation tank 12, thus form bottom
Water inlet, it forms anaerobic environment in can making sedimentation tank 12, anaerobic reaction occurs in promoting sedimentation tank 12, and then reduces ammonia in sewage
Nitrogen content.Sewage in sedimentation tank 12 reach a certain amount of after, when specially exceeding the height of sedimentation tank 12, overflow to two react
In district, flooding process carries out the alternative aeration cultivation with promotion activated sludge by aerator 4 to two reaction zones, and then
Being decomposed by oxidation operation in sewage, the upper strata primary water after reaction zone processes can be discharged by water decanter 2.Wherein,
Overflow area or overflow pipe can be set on sedimentation tank 12, in order in the sewage overflow of sedimentation tank 12 to reaction zone.
Wherein, the nitration reaction in reaction zone is divided into ammonium oxidation and nitrous acid ammoxidation, according to the difference of ammonium oxidation
Degree is divided into short distance oxidation and omnidistance oxidation, and after reacting due to short distance nitration, sewage has that mud is few, ammonia-nitrogen content is few, save energy
The advantages such as power, therefore it more obtains the high praise of people, and two reaction zones is alternately exposed by the present embodiment by aerator 4
Gas, and by the appearance oxygen concentration of sewage in each reaction zone of time control of control each reaction zone alternative aeration, and then promote
Alternately short distance nitration reaction in two reaction zones, it is ensured that reacted ammonia nitrogen in sewage content is less, and reduce reaction product
Raw sludge content, also reduces follow-up Treatment of Sludge cost.
It should be noted that the present embodiment aerator 4 is to two reaction zones alternative aeration, it is ensured that aerator 4
Persistence aeration, it is to avoid because intermittence aeration causes the waste of energy.And for the ease of observing the reaction controlling reaction zone, can be
Top, reaction zone arranges observation platform 6.
In concrete aeration process, the present embodiment is provided with a controller 44 and controls three-way valve 42 and make the water side of three-way valve 42
Alternately connecting with two aeration tubes 43, this controller 44 can arrange a human-computer interaction module so that exposing in arranging each reaction zone
The time of gas, it is this area routine techniques that this controller controls the mode of three-way valve 42, therefore is not described in detail it.
Wherein, described aeration tube 43 includes an aeration arranging along reaction zone length direction and connecting with described three-way valve 42
Supervisor 431 and the multiple aerations all connected with described aeration supervisor 431 are in charge of 432, and multiple aerations are in charge of 432 and are responsible for along aeration
The evenly distributed setting of length direction of 431, and each aeration is in charge of 432 and all 431 is vertically arranged with described aeration supervisor, this enforcement
Example is in charge of 432 pairs of reaction zones by aeration and is carried out uniform aeration.When specifically arranging, reaction tank 11 and sedimentation tank 12 can be respectively provided with
For circle, and reaction tank 11 and sedimentation tank 12 being coaxially disposed, two reaction zones is disposed as semi-annular shape, two aerations supervisors
431 are the arc being coaxially disposed with sedimentation tank 12, multiple aerations be in charge of 432 evenly distributed, and often along sedimentation tank 12 circumference
Individual aeration is in charge of 432 and is all radially arranged relative to sedimentation tank 12.
In order to increase the removing efficiency of ammonia nitrogen, sewage disposal system described in the present embodiment also includes that two are built in sedimentation tank
Reflux pump 5 in 12, the water inlet end of two reflux pumps 5 connects with two reaction zones respectively, specially carries out in two reaction zones
Oxidation reaction, carries out anti-nitration reaction by reflux pump 5 in the sewage suction sedimentation tank 12 in two reaction zones, thus enters one
The ammonia-nitrogen content eliminated in sewage of step, improves sewage treating efficiency.Wherein, reflux pump 5 is preferably disposed on bottom sedimentation tank, with
Promote anti-nitration reaction efficiency.
When specifically arranging, described reflux pump 5 and water decanter 2 are arranged respectively close to the two ends of reaction zone, thus avoid straining water
Device 2 water outlet is muddy.
As shown in Figure 2 and Figure 3, straining water effect to increase, the water decanter 2 of the present embodiment includes: lead for two be arranged in parallel
Bar 201, two described guide rod 201 lower ends are both secured to bottom described reaction zone；Carrier cylinder 202, described carrier cylinder
202 two ends are slidably connected with two described guide rods 201 respectively and can slide up and down by relative described guide rod 201, and described carrier
Multiple sorting hole 202a it is provided with on cylinder 202；The delivery hose 203 being connected with the water side of described carrier cylinder 202,
The water side of described delivery hose 203 through described reaction tank 11 sidewall and is connected with a control valve 204；And it is set in parallel in institute
Stating the floating drum 205 above carrier cylinder 202, described floating drum 205 is connected with described carrier cylinder 202 by connector 206.
The present embodiment water decanter 2 one aspect achieves and fluctuates with the water level in reaction zone, it is ensured that delivery hose 203 goes out
Water is the superiors' primary water, on the other hand can be separated by the biologic packing material in reaction zone by carrier cylinder 202, reduce biology
The loss of filler.
Wherein, described water decanter 2 also includes upper limit bar 207 setting up and down and lower limit bar 208, described upper limit bar
207 and lower limit bar 208 two ends be connected with two guide rods 201 respectively, described carrier cylinder 202 is arranged at upper limit bar 207
And between lower limit bar 208, carrier cylinder 202 range of movement can be limited by upper limit bar 207 and lower limit bar 208
On the one hand system, when avoiding water level in reaction zone too high, carrier cylinder 202 departs from guide rod 201, on the other hand avoids carrier to separate
Cylinder 202 drops down onto in the mud bottom reaction zone, causes sorting hole 221 to block.
Moving up and down with guide rod 201 for the ease of carrier cylinder 202, described in the present embodiment, water decanter 2 includes a connection
Short tube 209 and a position-limiting tube 210, described connection short tube 209 one end and one of them described guide rod 201 are slidably connected, the other end
Being connected with described carrier cylinder 202, described position-limiting tube 210 connects into one with described heavy pipe and is coated at described in other in which
The ring pipe of guide rod 201, the present embodiment mainly by connect short tube 209 one of them guide rod relative slip, position-limiting tube 210 then with
Counterweight tube cooperation is coated on another guide rod, and it can coordinate carrier cylinder 202 with upper limit bar 207 and lower limit bar 208
Carrying out spacing, it can be prevented effectively from during carrier cylinder 202 moves up and down stuck.
During actual application, in order to ensure that floating drum 205 and carrier cylinder 202 are in upper-lower position, it is to avoid floating drum 205 and load
Body cylinder 202 move up and down during rock, water decanter 2 described in the present embodiment also include one with described carrier cylinder 202
The heavy pipe 211 connected as one, its weight being mainly used in increasing carrier cylinder 202, lead to avoid floating drum 205 to rock
Cause service life of equipment shortens.
In order to increase the water outlet efficiency of sorting hole 221, each described sorting hole 202a of the present embodiment is along described carrier
Cylinder 202 arcuate socket circumferentially, multiple described sorting hole 202a are axially evenly arranged along described carrier cylinder 202.
The waste water processes of the present embodiment sewage disposal system is as follows: first pass through water inlet pipe and sewage is inputted sedimentation tank
In, in sedimentation tank, sewage can be carried out preliminary treatment, and sewage is easily formed anaerobic environment by entrance bottom sedimentation tank, it is heavy to promote
Anaerobic reaction in pond, shallow lake, when the water level in sedimentation tank exceedes its height, can overflow in two reaction zones, then by exposing
Device of air, to two reaction zones alternative aeration, makes two reaction zones alternately short distance nitration react, by controlling two reactions
Aeration time in district controls the dissolved oxygen amount in two reaction zones alternately to occur short distance nitration anti-in promoting two reaction zones
Should, and then promote reaction efficiency, reduce ammonia-nitrogen content and reduce mud generation amount, simultaneously can be by reflux pump by two reaction zones
The ammonia nitrogen that interior nitration reaction is formed is back to bottom sedimentation tank, occurs anti-nitration reaction to contain to reduce ammonia nitrogen in promoting sedimentation tank
Amount；After having reacted, in two reaction zones, certain time can be stood, then by water decanter draining.
Compared with prior art, sedimentation tank is built in reaction tank by one aspect of the present invention, and is separated to form two by dividing plate
Individual reaction zone, it is conducive to sewage to carry out anaerobism, Aerobic Process for Treatment successively, improves sewage treating efficiency, on the other hand by control
Three-way valve processed alternately carries out aeration to two reaction zones, and it is conducive to two reaction zones alternately short distance nitration to react, and improves
Reaction efficiency, reduce energy resource consumption.
The detailed description of the invention of present invention described above, is not intended that limiting the scope of the present invention.Any basis
Various other that the technology design of the present invention is made change and deformation accordingly, should be included in the guarantor of the claims in the present invention
In the range of protecting.
Claims (10)
1. the sewage disposal system of a suitching type intermittent aerating, it is characterised in that include,
Cell body, it includes that reaction tank, sedimentation tank and dividing plate, described sedimentation tank are built in reaction tank and also and form ring between reaction tank
The reaction cavity of shape, described dividing plate is built in reaction cavity and reaction cavity is separated into two reaction zones；
It is built in two water decanter of two reaction zones respectively；
The water inlet pipe connected with described sedimentation tank；
Aerator, the three-way valve being connected with the outlet side of Aeration fan including Aeration fan, respectively with three-way valve two go out
Two aeration tubes of gas end connection, two described aeration tubes are built in bottom two described reaction zones respectively.
The sewage disposal system of suitching type intermittent aerating the most according to claim 1, it is characterised in that described aerator
Also include one for controlling the controller of described two aeration tubes of three-way valve alternate communication.
The sewage disposal system of suitching type intermittent aerating the most according to claim 1 and 2, it is characterised in that described aeration
Pipe includes an aeration supervisor arranging along reaction zone length direction and connecting with described three-way valve and all connects with described aeration supervisor
Logical multiple aerations are in charge of, and multiple aerations are in charge of the evenly distributed setting of length direction along aeration supervisor, and each aeration is in charge of
All it is vertically arranged with described aeration supervisor.
The sewage disposal system of suitching type intermittent aerating the most according to claim 3, it is characterised in that described sewage disposal
System also includes two reflux pumps being built in described sedimentation tank, and the water inlet end of two reflux pumps is respectively with two reaction zones even
Logical.
The sewage disposal system of suitching type intermittent aerating the most according to claim 4, it is characterised in that described reflux pump and
Water decanter is arranged respectively close to the two ends of reaction zone.
The sewage disposal system of suitching type intermittent aerating the most according to claim 5, it is characterised in that described water decanter bag
Include,
Two guide rods be arrangeding in parallel, two described lower end of the guide rod are both secured to bottom described reaction zone；
Carrier cylinder, described carrier cylinder two ends are slidably connected with two described guide rods respectively and can relative described guide rods
Slide up and down, and be provided with multiple sorting hole on described carrier cylinder；
The delivery hose being connected with the water side of described carrier cylinder, the water side of described delivery hose passes described reaction tank
Sidewall is also connected with a control valve；And
Being set in parallel in the floating drum above described carrier cylinder, described floating drum is by connector with described carrier cylinder even
Connect.
The sewage disposal system of suitching type intermittent aerating the most according to claim 6, it is characterised in that described water decanter is also
Including upper limit bar setting up and down and lower limit bar, described upper limit bar and lower limit bar two ends respectively with two guide rods even
Connecing, described carrier cylinder is arranged between upper limit bar and lower limit bar.
The sewage disposal system of suitching type intermittent aerating the most according to claim 7, it is characterised in that described water decanter bag
Including a connection short tube and a position-limiting tube, described connection short tube one end and one of them described guide rod are slidably connected, the other end and institute
Stating carrier cylinder to connect, described position-limiting tube and described heavy pipe connect into an annular being coated at guide rod described in other in which
Pipe.
9. the sewage water treatment method of the arbitrary described sewage disposal system of a claim 1～8, it is characterised in that include as
Lower step,
(1) being passed through sewage in sedimentation tank by water inlet pipe, sewage is by entering bottom sedimentation tank and precipitating in sedimentation tank；
(2) sewage is by sedimentation tank overflow to two reaction zones, then carries out aeration by aerator, and controls three-way valve friendship
For connecting with two aeration tubes and replacing two reaction zones aeration respectively, replace into short distance nitration anti-in making two reaction zones
Should；
(3), after reaction zone biochemical reaction completes, stand and pass through water decanter water outlet.
Sewage water treatment method the most according to claim 9, it is characterised in that described step (2) also includes in reaction zone
Sewage backflow is to bottom sedimentation tank.
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| CN201610763555.0A CN106242054B (en) | 2016-08-29 | 2016-08-29 | Sewage treatment system and sewage treatment method with switching type intermittent aeration |
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| CN206188488U (en) * | 2016-08-29 | 2017-05-24 | 武汉东川自来水科技开发有限公司 | Switching formula intermittent aeration's sewage treatment system |
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2016
- 2016-08-29 CN CN201610763555.0A patent/CN106242054B/en active Active
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| CN2523757Y (en) * | 2001-08-10 | 2002-12-04 | 澄海市科立环保实业有限公司 | Water depositing apparatus |
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