CN105776546A - Sewage shortcut nitrification system - Google Patents

Sewage shortcut nitrification system Download PDF

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Publication number
CN105776546A
CN105776546A CN201610330041.6A CN201610330041A CN105776546A CN 105776546 A CN105776546 A CN 105776546A CN 201610330041 A CN201610330041 A CN 201610330041A CN 105776546 A CN105776546 A CN 105776546A
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CN
China
Prior art keywords
ammonia nitrogen
sensor
concentration
dissolved oxygen
nitrator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610330041.6A
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Chinese (zh)
Inventor
吴军
何成达
季俊杰
李雅慧
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Yangzhou University
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Yangzhou University
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Publication date
Application filed by Yangzhou University filed Critical Yangzhou University
Priority to CN201610330041.6A priority Critical patent/CN105776546A/en
Publication of CN105776546A publication Critical patent/CN105776546A/en
Pending legal-status Critical Current

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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
    • C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
    • 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
    • C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2

Abstract

The invention discloses a sewage shortcut nitrification system. The sewage shortcut nitrification system comprises a nitrification reactor and an automatic control system, wherein an ammonia nitrogen sensor, a solid concentration sensor and a dissolved oxygen sensor are arranged in the nitrification reactor, the ammonia nitrogen sensor, the solid concentration sensor and the dissolved oxygen sensor are respectively connected to the automatic control system; one side of the nitrification reactor is connected with a water inlet pump, the other side of the nitrification reactor is connected with sedimentation equipment, and an aeration system is arranged at the bottom of the nitrification reactor; and the sedimentation equipment is respectively connected to a sludge reflux pump and a sludge discharging pump, and the sludge reflux pump is connected to the nitrification reactor. The sewage shortcut nitrification system has the advantages that shortcut nitrification can be realized by controlling concentration of ammonia nitrogen and solids in mixed liquor under the condition of relatively high dissolved oxygen concentration, an ammonia nitrogen load can be increased, and greenhouse gas emission can be reduced; the growth rate of ammonia oxidizing bacteria (AOB) is relatively high, relatively high reaction efficiency can be obtained, and an ammonia nitrogen treatment load is increased.

Description

Sewerage short-cut nitrification
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of sewerage short-cut nitrification.
Background technology
Ammonia nitrogen is one of major pollutants causing body eutrophication, and nitration reaction is to remove the first step of ammonia nitrogen.Ammonia nitrogen (NH4 +) nitration reaction be the process of two-stage reaction, first under the effect of AOB (ammonia oxidation bacteria), NH4 +It is oxidized to N-NO2 -, then under NOB (NOB) acts on, it is oxidized to NO3 -.By controlling reaction condition, eliminate NOB, it is possible to achieve short distance nitration, there is the advantage saving aeration rate and denitrifying carbon source, and can combine with anaerobic ammonia oxidation process, it is achieved full autotrophic bacterium denitrogenation, greatly reduce sludge yield.At present, short distance nitration usually relies on low DO concentration (less than 0.8mgO2/ L), the factor such as high temperature and high the concentration of free ammonia suppress NOB, realize short distance nitration.
Utilize low DO concentration can cause nitrifying process percent of greenhouse gases N2The raising of O discharge, and when low DO concentration, nitration reaction speed is relatively low, is unfavorable for the raising of sewage treating efficiency.Adopt high temperature can increase substantially the energy consumption of sewage disposal, constrain short distance nitration application in municipal sewage treatment.Additionally in municipal sewage, ammonia nitrogen concentration is relatively low, and the concentration of free ammonia is not enough to suppress NOB, can be only applied to the process of high-concentration ammonia nitrogenous wastewater, is not suitable for realizing short distance nitration in municipal sewage.
Summary of the invention
Present invention aim to address the nitrated employing low DO concentration of current sewerage short-cut, make nitrifying process percent of greenhouse gases N2O discharges raising, and nitration reaction speed is relatively low, is unfavorable for the technical problem that sewage treating efficiency improves.
For realizing above goal of the invention, the present invention provides a kind of sewerage short-cut nitrification, including nitrator and automatic control system, being provided with ammonia nitrogen sensor, solid concentration sensor and dissolved oxygen sensor in described nitrator, described ammonia nitrogen sensor, solid concentration sensor and dissolved oxygen sensor are respectively connecting to described automatic control system；
Described nitrator side connects intake pump, and opposite side connects settling apparatus, and bottom is provided with aerating system；Described settling apparatus is respectively connecting to sludge reflux pump and sludge pump, and described sludge reflux pump is connected to described nitrator；
The described automatic control system data according to described ammonia nitrogen sensor, regulate the flow of described intake pump, and the ammonia nitrogen concentration in described nitrator is maintained preset value；The described automatic control system data according to described dissolved oxygen sensor, control described aerating system, and the dissolved oxygen concentration in nitrator is maintained preset value；The described automatic control system data according to described solid concentration sensor, control described sludge reflux pump and described sludge pump, the solid concentration in described nitrator are maintained preset value.
Further, described ammonia nitrogen concentration preset value is 5-30mgN/L.
Further, described dissolved oxygen concentration preset value is 1.5-3.0mgO2/L。
Further, described solid concentration preset value is 500-1000mg/L.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention, under relatively high-solubility oxygen concentration conditions, by controlling mixed liquor ammonia nitrogen and solid concentration, it is achieved short distance nitration, can improve ammonia nitrogen loading, reduce greenhouse gas emission；Ammonia oxidation bacteria AOB growth rate is higher, it is possible to obtain higher reaction efficiency, improves NH_3-N treating load；Nitrite nitrogen and remaining ammonia nitrogen that reaction obtains can be that follow-up anaerobic ammonia oxidation process improves substrate；Owing to mixed liquor ammonia nitrogen concentration still has surplus, ammonia oxidation bacteria AOB growth rate is higher, has superiority when competing dissolved oxygen with NOB NOB；Simultaneously as solid concentration is constant, the NOB NOB being in a disadvantageous position eventually is eliminated.
Accompanying drawing explanation
Fig. 1 is the operation principle schematic diagram of the present invention.
In figure, 1 intake pump, 2 automatic control systems, 3 aerating systems, 4 ammonia nitrogen sensors, 5 solid concentration sensors, 6 dissolved oxygen sensors, 7 nitrators, 8 settling apparatus, 9 sludge reflux pumps, 10 sludge pumps.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the sewerage short-cut nitrification of the present invention, including nitrator 7 and automatic control system 2, being provided with ammonia nitrogen sensor 4, solid concentration sensor 5 and dissolved oxygen sensor 6 in nitrator 7, ammonia nitrogen sensor 4, solid concentration sensor 5 and dissolved oxygen sensor 6 are respectively connecting to automatic control system 2；
Nitrator 7 side connects intake pump 1, and opposite side connects settling apparatus 8, and bottom is provided with aerating system 3；Settling apparatus 8 is respectively connecting to sludge reflux pump 9 and sludge pump 10, and sludge reflux pump 9 is connected to nitrator 7；
The automatic control system 2 data according to ammonia nitrogen sensor 4, regulate the flow of intake pump 1, the ammonia nitrogen concentration in nitrator 7 are maintained preset value 5-30mgN/L；The automatic control system 2 data according to dissolved oxygen sensor 5, control aerating system 3, the dissolved oxygen concentration in nitrator 7 are maintained preset value 1.5-3.0mgO2/L；The automatic control system 2 data according to solid concentration sensor 6, control sludge reflux pump 9 and sludge pump 10, the solid concentration in nitrator 7 are maintained preset value 500-1000mg/L.
Nitrator 7 is entered through intake pump 1 through the sanitary sewage of organics removal, nitrator 7 arranges ammonia nitrogen sensor 4, solid concentration sensor 5 and dissolved oxygen sensor 6, by aerating system 3 to nitrator 7 oxygen supply, sewage enters settling apparatus 8 after nitrator 7 has reacted, sewage sludge solid part after precipitation is entered nitrator 7 by reflux pump 9, and partial sludge is discharged by sludge pump 10.
The flow of intake pump 1 is regulated by automatic control system 2, mixed liquor ammonia nitrogen concentration is made to maintain setting value, when mixed liquor ammonia nitrogen concentration is lower than setting value, the flow of intake pump 1 is improved by automatic control system 2, improve ammonia nitrogen loading, maintain ammonia nitrogen concentration setting value, otherwise, then reduce flow of inlet water；By regulating the flow of sludge pump 10, maintain mixed liquor solid concentration in setting value.Control aerating system 3, maintain dissolved oxygen concentration at 1.5-3.0mgO2Between/L.
According to influent ammonium concentration height, mixed liquor solid concentration is set between 500-1000mg/L.It is 1.5mgO in dissolved oxygen setting value2During/L, mixed liquor ammonia nitrogen concentration setting value need at more than 5.0mgN/L.When dissolved oxygen setting value is 3.0mgO2During/L, mixed liquor ammonia nitrogen concentration setting value need at more than 20.0mgN/L.
Preferably, the automatic control system 2 data according to ammonia nitrogen sensor 4, regulate the flow of intake pump 1, maintain the ammonia nitrogen concentration in nitrator 7 at 30mgN/L；The automatic control system 2 data according to dissolved oxygen sensor 6, control aerating system 3, maintain the dissolved oxygen concentration in nitrator 7 at 1.5mgO2/L；The automatic control system 2 data according to solid concentration sensor 5, control sludge reflux pump 9 and sludge pump 10, maintain the solid concentration in nitrator 7 at 500mg/L.
Being that after 60mgN/L artificial wastewater tests 100 days, nitrite accumulation rate reaches 98% through configuring ammonia nitrogen concentration with laboratory, in water outlet, ammonia nitrogen and nitrite nitrogen concentration ratio are close to 1:1, it is possible to as the substrate of follow-up anaerobic ammonia oxidation process.Ammonia nitrogen loading is up to 0.8kgN/ (m3d), and conventional nitration reactor ammonia nitrogen loading is typically in 0.2-0.4kgN/ (m3d), and owing to running under relatively high-solubility oxygen concentration conditions, greenhouse gas emission is relatively low.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.

Claims (4)

1. a sewerage short-cut nitrification, it is characterized in that, including nitrator and automatic control system, being provided with ammonia nitrogen sensor, solid concentration sensor and dissolved oxygen sensor in described nitrator, described ammonia nitrogen sensor, solid concentration sensor and dissolved oxygen sensor are respectively connecting to described automatic control system；
Described nitrator side connects intake pump, and opposite side connects settling apparatus, and bottom is provided with aerating system；Described settling apparatus is respectively connecting to sludge reflux pump and sludge pump, and described sludge reflux pump is connected to described nitrator；
The described automatic control system data according to described ammonia nitrogen sensor, regulate the flow of described intake pump, and the ammonia nitrogen concentration in described nitrator is maintained preset value；The described automatic control system data according to described dissolved oxygen sensor, control described aerating system, and the dissolved oxygen concentration in nitrator is maintained preset value；The described automatic control system data according to described solid concentration sensor, control described sludge reflux pump and described sludge pump, the solid concentration in described nitrator are maintained preset value.
2. sewerage short-cut nitrification as claimed in claim 1, it is characterised in that described ammonia nitrogen concentration preset value is 5-30mgN/L.
3. sewerage short-cut nitrification as claimed in claim 1, it is characterised in that described dissolved oxygen concentration preset value is 1.5-3.0mgO2/L。
4. sewerage short-cut nitrification as claimed in claim 1, it is characterised in that described solid concentration preset value is 500-1000mg/L.
CN201610330041.6A 2016-05-18 2016-05-18 Sewage shortcut nitrification system Pending CN105776546A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106745737A (en) * 2016-12-17 2017-05-31 杭州师范大学 A kind of short distance nitration Anammox manifold type denitrification reactor
CN110422926A (en) * 2018-07-13 2019-11-08 江苏普朗德节能科技有限公司 A kind of biogas slurry nitrification denitrogenation reuse autocontrol method and system

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CN105293702A (en) * 2015-11-07 2016-02-03 北京工业大学 Method and device for staring and stably maintaining short-cut nitrification and denitrification by controlling different anoxic and aerobic volume ratios

Patent Citations (6)

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JP2008272625A (en) * 2007-04-26 2008-11-13 Kumamoto Univ Wastewater treatment system
US20130334132A1 (en) * 2010-05-07 2013-12-19 Jason M. Calhoun Methods for Treatment of Waste Activated Sludge
CN201981098U (en) * 2011-03-09 2011-09-21 桂林理工大学 Short-range nitrifying device
CN103482763A (en) * 2013-10-11 2014-01-01 北京北排水务设计研究院有限公司 Polymorphic microorganism aggregate autotrophic nitrogen removal integrated device and operation method
CN103739066A (en) * 2013-12-24 2014-04-23 清华大学 Autotrophic denitrification synchronous sludge fermentation coupled denitrification device and method for sewage with low nitrogen ratio
CN105293702A (en) * 2015-11-07 2016-02-03 北京工业大学 Method and device for staring and stably maintaining short-cut nitrification and denitrification by controlling different anoxic and aerobic volume ratios

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马勇等: "A/O生物脱氮工艺处理生活污水中试(一)短程硝化反硝化的研究", 《环境科学学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106745737A (en) * 2016-12-17 2017-05-31 杭州师范大学 A kind of short distance nitration Anammox manifold type denitrification reactor
CN110422926A (en) * 2018-07-13 2019-11-08 江苏普朗德节能科技有限公司 A kind of biogas slurry nitrification denitrogenation reuse autocontrol method and system

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Application publication date: 20160720