CN105481210B - A kind of the sewage water denitrification group technology and device of automatic cycle flowing - Google Patents
A kind of the sewage water denitrification group technology and device of automatic cycle flowing Download PDFInfo
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- CN105481210B CN105481210B CN201610106212.7A CN201610106212A CN105481210B CN 105481210 B CN105481210 B CN 105481210B CN 201610106212 A CN201610106212 A CN 201610106212A CN 105481210 B CN105481210 B CN 105481210B
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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
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4608—Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The sewage water denitrification group technology of the automatic cycle flowing of the present invention, including a) aeration of sewage；B) automatic cycle of sewage；D) nitrosation reactions；E) Anammoxs react；F) electrochemical reducting reactions；G) is oxygenated again.The sewage water denitrification device of the present invention, including aeration post, reaction column, inflow pipe, return duct and aeration head, are characterised by：The both ends of inflow pipe are communicated with being aerated the top of post, the bottom of reaction column respectively, and sludge blanket, packing layer are provided with reaction column, there is heterotroph bacterium colony, nitrococcus bacterium colony, anaerobic ammonia oxidizing bacteria bacterium colony in sludge blanket, packing layer is made up of reduction iron filings.The technique and device of the present invention, by the reduction reaction of the cyclic process of nitrous Anammox, and iron filings, can remove the nitrogen in sewage completely；The automatic cycle flowing of water body is also achieved simultaneously, and there is the advantages of tool equipment is few, flow is simple, energy consumption is small, beneficial effect is notable.
Description
Technical field
The present invention relates to the sewage water denitrification group technology and device of a kind of automatic cycle flowing, in particular, especially relate to
And it is a kind of by aeration aerating, nitrosation-anaerobic ammoxidation denitrogenation, electrochemical reducting reaction process combination, and there is water body
The technique and device that the realization of automatic cycle function removes completely to nitrogen in sewage.
Background technology
One of the main reason for nitrogen source pollutant in water body is water environment pollution, they are mainly with ammonia, nitrate salts
In the presence of.Thus, nitrogen class material always removes object for the emphasis of environmental worker in sewage.Until today, conventional method is anti-
Nitrification, emerging technique is Anammox method.Traditional minimizing technology, it is necessary to the greatly input of energy consumption and chemicals,
Not only complex process, and high cost, less it is applied in the limited area of economic capability.And in general Anammox
Method, there was only 85% or so to the theoretical highest clearance of nitrogen, nitrogen can not still be removed completely.Remain in water body
The eutrophication that can still cause water body in the form of nitrate be present.
During in face of the nitrogenous effluent or sewage of small water high concentration, such as the sludge-digestion liquid of municipal sewage plant, coking are made
Gas waste water, small towns low discharge sewage etc., it is more notable the shortcomings that the two methods of the above.On the one hand, because digestion liquid measure is small, dense
Degree is big, and flow complexity denitrogenation facility is extremely uneconomical, while is unable to reach the purpose of complete denitrogenation.For above present situation, this hair
It is bright to be intended to invent that a kind of plant equipment is few, flow is simple, energy consumption is small, and can be by technique that nitrogen dvielement removes completely or side
Method.
The content of the invention
A kind of the shortcomings that present invention is in order to overcome above-mentioned technical problem, there is provided sewage water denitrification combination of automatic cycle flowing
Technique and device.
The present invention automatic cycle flowing sewage water denitrification group technology, it is particular in that, by following steps come
Realize：
A) aeration of sewage, air is passed through into sewage to be clean, realizes the aeration to sewage, so that molten in sewage
Solve the oxygen of saturation；
B) sewage is passed through, and the sewage after dissolved oxygen is passed through to the bottom of reaction column, is distributed from the bottom to top in reaction column
There are sludge blanket and packing layer, be disposed with heterotroph bacterium colony, nitrococcus bacterium colony, Anammox in sludge blanket from the bottom to top
Bacterium bacterium colony, packing layer are made up of reduction iron filings；
C) consumption of organic matters, oxygen-containing sewage first pass around heterotroph bacterium colony, are decomposed by heterotroph a variety of in sewage
Organic matter, realize the removal of dirty Organic substance in water；
D) nitrosation reactions, during sewage flows through nitrococcus bacterium colony, the ammonia nitrogen in sewage is using dissolved oxygen as electronics
Acceptor, by the part mineralized nitrogen in sewage it is nitrite nitrogen by the nitrosation process of nitrococcus, and consumes dissolved oxygen；
E) Anammoxs are reacted, and when sewage flows through Anammox bacterium colony, most of dissolved oxygen in sewage is disappeared
Consumption, remaining ammonia nitrogen and nitrite nitrogen are converted into by nitrogen and part nitre by the anaerobic ammonium oxidation process of anaerobic ammonia oxidizing bacteria simultaneously
Nitrogen；
F) electrochemical reducting reactions, sewage finally flow through packing layer, in packing layer in the presence of reduced iron, in sewage
Remaining nitrate nitrogen is reduced to ammonia nitrogen or nitrite nitrogen again, to be removed in subsequent cycle purification process；
G) is oxygenated and circulated again, and the water body by outflow at the top of reaction column is oxygenated again, the water after being oxygenated again
Body is passed through in reaction column after being mixed with the sewage first entered into, realizes the circularly purifying of sewage, so that the nitrogen in sewage is gone
Except rate meets to require.
The device of the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention, including be aerated post, reaction column, enter
Flow tube, return duct and aeration head, the inside for being aerated post and reaction column is cavity, and the top for being aerated post is provided with water inlet,
For injecting sewage to be clean；Aeration head is arranged at the bottom of aeration post internal cavities, for being passed through air, so as to be clean
The oxygen of saturation is dissolved in sewage；It is particular in that：The both ends of inflow pipe respectively be aerated the top of post, reaction column bottom
Portion communicates, so that the sewage in aeration post enters from the bottom of reaction column；Be disposed with from the bottom to top in reaction column sludge blanket,
Packing layer, heterotroph bacterium colony, nitrococcus bacterium colony, anaerobic ammonia oxidizing bacteria bacterium colony are distributed with from the bottom to top in sludge blanket, with respectively
Consumption organic matter, nitrosation, Anammox reaction are carried out, packing layer is made up of reduction iron filings, and nitrate nitrogen is reduced into ammonia nitrogen
Or nitrite nitrogen, realize the removal of ammonia nitrogen in sewage；The both ends of return duct respectively the top with reaction column, be aerated post bottom phase
It is logical, to realize the cyclic aeration of sewage and purification.
The device of the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention, sludge blanket in the reaction column
Lower section is provided with supporting layer, and supporting layer realizes the carrying to sludge blanket and the sewage entered by inflow pipe is evenly distributed into reaction
On the cross section of post；The separate layer carried to it is provided with below described filler layer.
The device of the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention, the aeration post and reaction column
Top is open, so that sewage can dissolve the oxygen in air, reduces aeration quantity.
The device of the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention, the bottom of the aeration post open up
Have for the delivery port of the sewage finished discharge will to be purified.
The device of the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention, the aeration head in aeration column bottom
Aeration effect under so that aeration post in water body density be less than reaction column in water body density, and then cause reaction column in
Water body is automatically flowed into aeration post by return duct；After liquid level in reaction column declines, the water body being aerated in post also automatically flows into
In reaction column, and then realize the automatic cycle flowing of current.
The beneficial effects of the invention are as follows：The sewage water denitrification group technology and device of the automatic cycle flowing of the present invention, wait to take off
After the sewage aeration of nitrogen processing, it is passed through and is disposed with heterotroph bacterium colony, nitrococcus bacterium colony, Anammox bacterium colony, iron filings
Reaction column so that heterotroph can remove the organic matter in sewage, and nitrococcus is by nitrosation process by the part in sewage
Mineralized nitrogen is nitrite nitrogen, and remaining ammonia nitrogen and nitrite nitrogen are converted into nitrogen and nitre by Anammox by anaerobic ammonium oxidation process
Nitrogen；Further, nitrate nitrogen is converted into by ammonia nitrogen or nitrite nitrogen by the reduction reaction of iron filings again, so as to cleaned in subsequent cycle
Removed in journey, by repeatedly circulation, almost realize the complete removing of nitrogen in sewage.
Meanwhile acted on by aeration of the aeration head in post is aerated so that the density of sewage is less than reaction column in aeration post
The density of middle sewage, therefore the sewage in reaction column can be automatically flowed into by return duct in aeration post；With liquid level in reaction column
The decline of height, the sewage being aerated in post can be automatically flowed into reaction column again, and then realize the automatic cycle flowing of water body, nothing
Other drive devices need to be set up.The form of upper end open is disposed as by the way that post and reaction column will be aerated so that sewage can dissolve
Oxygen in air, advantageously reduces aeration quantity.The technique and device of the present invention, with tool equipment is few, flow is simple, energy consumption
Small, the advantages of beneficial effect is notable, it is suitable for the application of popularization.
Brief description of the drawings
Fig. 1 is the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention and the structure principle chart of device.
In figure：1 water inlet, 2 aeration posts, 3 aeration heads, 4 air supply pipes, 5 delivery ports, 6 inflow pipes, 7 reaction columns, 8 supporting layers,
9 sludge blankets, 10 separate layers, 11 packing layers, 12 return ducts.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, give the sewage water denitrification group technology for being used for automatic cycle flowing of the present invention and the knot of device
Structure schematic diagram, it is made up of aeration post 2, reaction column 7, inflow pipe 6, return duct 12, aeration head 3 and air supply pipe 4, is aerated the He of post 2
The inside of reaction column 7 is cavity, and the upper end of aeration post 2 offers water inlet 1, and sewage to be clean is entered by water inlet 1
It is aerated in post 2.Aeration head 3 is arranged at the bottom of the aeration internal cavities of post 2, and aeration head 3 is connected with air supply pipe 4, for exposure
Air is blasted in gas column 2, sewage is aerated, makes the oxygen that saturation is dissolved in sewage.The upper end of inflow pipe 6 and aeration post 2
Top communicate, the lower end of inflow pipe 6 communicates with the bottom of reaction column 7.The sewage after oxygen has been dissolved in aeration post 2 by entering
Flow tube injects the bottom of reaction column 7.
In the internal cavities of reaction column 7, supporting layer 8, sludge blanket 9, separate layer 10 and packing layer are disposed with from the bottom to top
11, supporting layer 8 is located at the lower section of sludge blanket 9, and supporting layer 8 is used to carry sludge blanket 9, avoids 9 times leakages of sludge blanket, and have water distribution
The sewage entered by inflow pipe 6 can be uniformly distributed on the cross section of reaction column 7 by effect, supporting layer 8.In sludge blanket 9 under
Supreme to be sequentially distributed heterotroph bacterium colony, nitrococcus bacterium colony, anaerobic ammonia oxidizing bacteria bacterium colony, separate layer 10 is located at sludge blanket 9
Top, its top are packing layer 11, and packing layer 11 is made up of reproducibility iron filings；Separate layer 10 realizes that the carrying to sludge blanket 9 is made
With it is allowing sewage in the case of the iron filings in spice layer 11 can be avoided to leak down.
The sewage entered by inflow pipe 6 first flows through the heterotroph bacterium colony in sludge blanket 9, can in the presence of heterotroph
Consume the gas chromatography in sewage.Then, sewage flows through the nitrococcus bacterium colony in sludge blanket 9, in the Asia of nitrococcus
It is nitrite nitrogen by the part mineralized nitrogen in sewage so that the ammonia nitrogen in sewage is removed, and consumes dirt under nitrification
Dissolved oxygen in water；Then, sewage flows through the anaerobic ammonia oxidizing bacteria bacterium colony in sludge blanket 9, in the presence of anaerobic ammonia oxidizing bacteria
Anammox is carried out, the ammonia nitrogen in sewage and nitrite nitrogen are converted into nitrogen and nitrate nitrogen.Through nitrosation reaction, Anammox
Nitrate nitrogen is rich in reaction sewage, last sewage flows through packing layer 11, in packing layer 11 in the presence of reproducibility iron filings, by sewage
In nitrate nitrogen be converted into ammonia nitrogen or nitrite nitrogen, while have part ferro element dissolution, realize the removal of nitrate nitrogen.
The upper end of shown return duct 12 communicates with the top of reaction column 7, the lower end of return duct 12 and the bottom phase for being aerated post 2
Logical, because 3 continuous aeration of aeration head acts on, aeration head 3 blasts the air of micro-bubble form into sewage, makes aeration post 3
In water body global density reduce；At identical height and position, the hydraulic pressure being aerated in post 2 is less than in reaction column 7 and return duct 12
Hydraulic pressure, be particularly aerated that the base pressure difference of post 2 is maximum, and therefore, returning full of sewage can be passed through by reacting the sewage of capital 7
Flow tube 12 returns to aeration post 2, so as to form the automatic cycle of current between two cylinders.Aeration is back to through return duct 12
Water body in post 2, be oxygenated again in post 2 is aerated, and with newly flow into sewage mixing after by inflow pipe 6 into reaction column 7
Carry out further denitrogenation.By repeatedly circulation, the complete removing of nitrogen in sewage is almost realized.
The bottom of aeration post 2 offers delivery port 5, for discharging the water body after denitrogenation.Shown aeration post 2 and reaction column
7 upper end is open so that sewage can dissolve the oxygen in air, advantageously reduce aeration quantity.
Because the maximum dissolved oxygen of water is about 10mg/l, can only oxidized portion ammonia nitrogen be nitrite nitrogen supply denitrogenation, therefore,
The complete denitrogenation of sewage needs sewage multiple flow circuit in aeration post and reaction column, by oxygenation-denitrification process repeatedly,
Until ammonia nitrogen is completely converted；Simultaneously as the electron acceptor needed for the course of reaction of microorganism and nitrogen can only pass through exposure
Gas and the air on surface are provided, and aeration intensity is controlled by aeration head 3 and air supply pipe 4, realize the appropriateness oxygenation of processed sewage
And the accurate supply to dissolved oxygen needed for Microbial denitrogenation, avoid aeration from excessively causing unnecessary energy resource consumption and oxygenation deficiency
Caused by efficiency it is low.
Reduced iron in packing layer 11 has the ability that the nitrate nitrogen in water and nitrite nitrogen are reduced to nitrite nitrogen and ammonia nitrogen, because
This, which passes through in the sewage repeatedly handled, does not almost have nitrate nitrogen, and the mode that ammonia nitrogen is completely converted into nitrogen is removed；Certainly simultaneously
The ferro element of body can be consumed, it is then desired to iron filings totally when add iron filings；Because the ferro element of consumption is with ionic state
It is dissolved in sewage, and sludge blanket can be arrived by circulation, is advantageous to microorganism and promotes itself by the catalytic action of ferro element
Growth and activity.
It is aerated post 2 in the present invention to connect using pipeline with reaction column 7, hydraulic pressure reduces caused by being aerated the bubble in post 2, makes
Obtain sewage and reaction column 7 is flowed into from aeration post 2 by inflow pipe 6, then aeration post 2 is returned to by return duct 12, realize that sewage is exposing
Automatic flowing circulation between gas column 2 and reaction column 7.Due to providing denitrification process using the mode being oxygenated to water inlet and recirculation water
In necessary electron acceptor --- oxygen, the control to aeration quantity, realize the accurate supply of electron acceptor, be sludge blanket in life
Change reaction and stable condition is provided.Further there is the ability that nitrate nitrogen is reduced to ammonia nitrogen and nitrite nitrogen by reduced iron, realize
The complete removal of nitrogen.
Claims (4)
1. the device of a kind of sewage water denitrification group technology for automatic cycle flowing, it is characterised in that automatic cycle flowing
Sewage water denitrification group technology is realized by following steps：
A) aeration of sewage, air is passed through into sewage to be clean, realizes the aeration to sewage, so as to be dissolved in sewage full
The oxygen of sum；
B) sewage is passed through, and the sewage after dissolved oxygen is passed through to the bottom of reaction column, dirt is distributed with from the bottom to top in reaction column
Mud layer and packing layer, heterotroph bacterium colony, nitrococcus bacterium colony, anaerobic ammonia oxidizing bacteria bacterium are disposed with from the bottom to top in sludge blanket
Fall, packing layer is made up of reduction iron filings；
C) consumption of organic matters, oxygen-containing sewage first pass around heterotroph bacterium colony, are decomposed by heterotroph a variety of organic in sewage
Thing, realize the removal of dirty Organic substance in water；
D) nitrosation reactions, during sewage flows through nitrococcus bacterium colony, ammonia nitrogen in sewage using dissolved oxygen as electronics by
Body, by the part mineralized nitrogen in sewage it is nitrite nitrogen by the nitrosation process of nitrococcus, and consumes dissolved oxygen；
E) Anammoxs are reacted, and when sewage flows through Anammox bacterium colony, most of dissolved oxygen in sewage has been consumed,
Remaining ammonia nitrogen and nitrite nitrogen are converted into by nitrogen and part nitrate nitrogen by the anaerobic ammonium oxidation process of anaerobic ammonia oxidizing bacteria simultaneously；
F) electrochemical reducting reactions, sewage finally flow through packing layer, remaining in sewage in packing layer in the presence of reduced iron
Nitrate nitrogen be reduced to ammonia nitrogen or nitrite nitrogen again, to be removed in subsequent cycle purification process；
G) is oxygenated and circulated again, and the water body by outflow at the top of reaction column is oxygenated again, water body after being oxygenated again and
It is passed through after the sewage mixing first entered into reaction column, the circularly purifying of sewage is realized, so that the nitrogen clearance in sewage
Meet to require；
Device for the sewage water denitrification group technology of automatic cycle flowing includes aeration post（2）, reaction column（7）, inflow pipe
（6）, return duct（12）And aeration head（3）, the inside for being aerated post and reaction column is cavity, be aerated post top be provided with into
The mouth of a river（1）, for injecting sewage to be clean；Aeration head is arranged at the bottom of aeration post internal cavities, for being passed through air, with
Make the oxygen that saturation is dissolved in sewage to be clean；The both ends of inflow pipe communicate with being aerated the top of post, the bottom of reaction column respectively,
So that the sewage in aeration post enters from the bottom of reaction column；Sludge blanket is disposed with reaction column from the bottom to top（9）, filler
Layer（11）, heterotroph bacterium colony, nitrococcus bacterium colony, anaerobic ammonia oxidizing bacteria bacterium colony are distributed with from the bottom to top in sludge blanket, with respectively
Consumption organic matter, nitrosation, Anammox reaction are carried out, packing layer is made up of reduction iron filings, and nitrate nitrogen is reduced into ammonia nitrogen
Or nitrite nitrogen, realize the removal of ammonia nitrogen in sewage；The both ends of return duct respectively the top with reaction column, be aerated post bottom phase
It is logical, to realize the cyclic aeration of sewage and purification；
In aeration post（2）The aeration head of bottom（3）Aeration effect under so that the density of water body is less than reaction column in aeration post
（7）The density of middle water body, and then cause the water body in reaction column to pass through return duct（12）Automatically flow into aeration post；In reaction column
Liquid level decline after, be aerated post in water body also automatically flow into reaction column, and then realize current automatic cycle flowing.
2. the device of the sewage water denitrification group technology according to claim 1 for automatic cycle flowing, it is characterised in that：
The reaction column（7）Middle sludge blanket（9）Lower section be provided with supporting layer（8）, supporting layer realizes carrying to sludge blanket and will be by
The sewage that inflow pipe enters is evenly distributed on the cross section of reaction column；Described filler layer（11）Lower section be provided with it carried out
The separate layer of carrying（10）.
3. the device of the sewage water denitrification group technology according to claim 1 for automatic cycle flowing, it is characterised in that：
The aeration post（2）And reaction column（7）Top be open so that sewage can dissolve air in oxygen, reduce aeration quantity.
4. the device of the sewage water denitrification group technology according to claim 1 for automatic cycle flowing, it is characterised in that：
The aeration post（2）Bottom offer for will purify finish sewage discharge delivery port.
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| CN201610106212.7A CN105481210B (en) | 2016-02-26 | 2016-02-26 | A kind of the sewage water denitrification group technology and device of automatic cycle flowing |
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| CN107235559A (en) * | 2017-07-12 | 2017-10-10 | 北京化工大学 | The synchronization denitrification apparatus and method of a kind of sewage automatic cycle flowing |
| CN107381808B (en) * | 2017-07-12 | 2020-09-22 | 北京工业大学 | Integrated efficient denitrification device and method for automatic sewage circulation |
| CN111517588B (en) * | 2020-06-01 | 2022-03-29 | 北京工业大学 | Device and method for treating oxidized nitrogen wastewater by using ferroalloy in combination with anaerobic ammonium oxidation bacteria |
| CN112320935A (en) * | 2020-11-13 | 2021-02-05 | 山东泰山自迩环保科技有限公司 | Independent aeration combined tower and method for treating organic wastewater |
| CN112320954A (en) * | 2020-11-13 | 2021-02-05 | 山东泰山自迩环保科技有限公司 | Split aeration combined tower and method for treating high-concentration organic and/or nitrogen-containing wastewater |
| CN112321093A (en) * | 2020-11-13 | 2021-02-05 | 山东泰山自迩环保科技有限公司 | Separate aeration upflow aerobic granular sludge integrated sewage treatment equipment and method |
| WO2022100180A1 (en) * | 2020-11-13 | 2022-05-19 | 山东泰山自迩环保科技有限公司 | Aeration combination tower and method for treating organic wastewater |
| CN112320953A (en) * | 2020-11-13 | 2021-02-05 | 山东泰山自迩环保科技有限公司 | Separate aeration self-circulation two-stage denitrification integrated sewage treatment equipment and method |
| CN112320952B (en) * | 2020-11-13 | 2023-11-21 | 山东泰山自迩环保科技有限公司 | Separated aeration up-flow type aerobic granular sludge bed and sewage treatment process |
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| JP2003024982A (en) * | 2001-07-17 | 2003-01-28 | Kurita Water Ind Ltd | Biological denitrification method and biological denitrification apparatus |
| JP4882177B2 (en) * | 2001-07-19 | 2012-02-22 | 栗田工業株式会社 | Preservation method of autotrophic denitrifying microorganisms |
| CN102167475A (en) * | 2011-03-09 | 2011-08-31 | 桂林理工大学 | Nitrogen-containing waster water purification method |
| CN104961290B (en) * | 2015-04-23 | 2018-04-27 | 戚汝常 | Using pretreatment and micro- aeration two benches formula low energy consumption sewage water treatment method and system |
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