CN1040775A - The denitrogenation method of high nitrogen-containing sewage and equipment - Google Patents
The denitrogenation method of high nitrogen-containing sewage and equipment Download PDFInfo
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- CN1040775A CN1040775A CN89107208A CN89107208A CN1040775A CN 1040775 A CN1040775 A CN 1040775A CN 89107208 A CN89107208 A CN 89107208A CN 89107208 A CN89107208 A CN 89107208A CN 1040775 A CN1040775 A CN 1040775A
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- denitrification
- soft
- nitrated
- sewage
- filler
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- 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
A kind of denitrogenation method of high nitrogen-containing sewage and equipment belong to the biochemical processing method class of sewage.In the existing biological denitrification method, active sludge all is not in the optimum activity state, and the operation energy consumption of equipment is higher.The invention provides a kind of employing soft-filler bed denitrification device, soft-filler bed or activated sludge tank are the denitrification of nitrated device, nitrated, precipitation denitrification process, this method and apparatus makes active sludge be in optimum regime all the time, and reflux ratio is less can reduce energy consumption.
Description
A kind of denitrogenation method of nitric wastewater and equipment belong to the biochemical processing method class of sewage.
The principal element that causes body eutrophication is elements such as nitrogen, phosphorus.Contained a large amount of ammonia nitrogen (NH in coked waste water and some other industrial sewage
+ 4) be the one of the main reasons of water pollution.It mainly shows the pollution of water body: the one, consume the oxygen in the receiving water body, and cause oxygen in water sharply to descend.Because ammonia nitrogen can be oxidized to nitric nitrogen (NO under aerobic conditions
- 3-N) or nitrite nitrogen (NO
- 2-N); The 2nd, cause body eutrophication, make algae increase in the water body.Algal grown is crossed distinguished gathering and is made the flavoursome and smell of water.Currently used denitride technology mainly is a bio-denitrification technology, and this technology was finished by two stages.Fs is the nitrifying process that ammonia nitrogen is converted into nitric nitrogen from the nutritional type nitrifier under aerobic condition.Its principal reaction is:
Subordinate phase is the denitrification process that the facultative denitrifying bacteria of heterotroph under anaerobic is converted into nitric nitrogen nitrogen.In this stage, denitrifying bacteria is with NO
- 3And NO
- 2For oxygen source falls energy to organism, and with NO
-3 and NO
-2 change into nitrogen, remove from sewage.Its principal reaction is:
Fig. 3, Fig. 4 have provided the technical process of two kinds of biological denitrification methods in the prior art, it is nitrated that their common feature is that sewage carries out earlier, carries out denitrification again, in this technical process, because the water inlet in denitrification stage is from the water outlet of aerobic nitrification section, and contain a large amount of NO in the water
- 3And NO
- 2, therefore can not be in absolute anaerobic state in the denitrification stage, the actual anoxic condition that is in of denitrification stage.To the improvement of above-mentioned two kinds of technical process, drawn anoxic-aerobic process flow process as shown in Figure 5.Used nitrification and denitrification equipment mainly is fluidized-bed in this technical process, this fluidized-bed reaches fluidized state for making its actives (active sludge) and carrier thereof, need whipping appts be set in its bottom, and require a fluidic flow to want enough big, for reaching traffic requirement, need bigger reflux ratio, the general requirement reflux ratio reaches more than 270: 1, will cause bigger energy consumption like this.In this technical process, nitrifying sludge is back to the denitrification section earlier in addition, enters nitrated section again.In the denitrification section, nitrifying sludge is suppressed, and also need have one section to recover active process after it enters nitrated section, and fluidized-bed denitrification device is brought denitrification mud into nitrated device inevitably.Therefore, the nitrification and denitrification process all is to move under the condition that is subjected to inhibition to a certain degree in this technical process.Therefore, its denitrogenation speed will be restricted.
Purpose of the present invention aims to provide a kind of denitrogenation method and equipment thereof that the nitrification and denitrification stage all is in optimum regime that makes.
Method of the present invention is: nitric wastewater is introduced into the denitrification device, introduces nitrated device again, introduces the settling tank post precipitation at last and discharges.Settling tank mud is back to nitrated device, and the portion water that goes out settling tank is back to the denitrification device, and its reflux ratio is 5～10: 1, and sewage added NaHCO before entering nitrated device
3The pH value of adjusting sewage is 5～9, and it is above (with CaCO that the basicity of sewage remains on 100mg/l
3Meter).
Processing method of the present invention can adopt following equipment to realize:
Denitrification device, nitrated device all adopt the soft-filler bed.
The denitrification device adopts the soft-filler bed, and nitrated device adopts activated sludge tank.
Soft-filler is the line segment that fibrous chemical fibre thing twists into, and compiles on a well rope rope, and many well rope ropes distribute to be hung on and constitute the soft-filler bed in the reactor, and the activated sludge absorption after cultivating is on soft-filler.
Activated sludge tank can be complete hybrid or plug-flow type active sludge pond.
Compared with the prior art method of the present invention and equipment thereof have following advantage:
1, adopts the soft-filler bed to replace fluidized-bed to carry out denitrification or the nitrated reflux ratio that can make reduced to 5～10: 1 from 270: 1, the operation energy consumption of equipment is greatly reduced.
2, the denitrification section adopts the soft-filler bed, activated sludge absorption is on soft-filler, and reflux ratio is less, and flow velocity reduces in the bed, therefore denitrification mud can not taken the denitrification device out of and introduce nitrated device, has therefore guaranteed that denitrification mud is in the optimum regime active condition.
3, settling tank mud is drawn back nitrated section, and will be back to the denitrification section, guaranteed that like this nitrifying sludge is not suppressed and is in the optimum activity state through oettIed sewage.
4, the soft-filler line segment that adopts fibrous chemical fibre thing to twist into is compiled on the well rope rope, can prevent that the impurity in mud and the water from making the fiber bonding agglomerating.
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is the structural representation of soft-filler bed.
Fig. 3, Fig. 4 are the process flow diagrams of aerobic in the prior art-anaerobic denitrification method.
Fig. 5 is the process flow diagram of anaerobic-aerobic denitrogenation method in the prior art.
What enumerate below is the optimum implementation of type of the present invention:
1, a kind of biological denitrification method that is applied to the coked waste water processing, sewage is at room temperature introduced the denitrification device, this denitrification device is the soft-filler bed, and sewage goes out the denitrification device and introduces the nitrated device of soft-filler bed again, and sewage added NaHCO before entering nitrated device
3, the basicity of adjusting sewage greater than 150mg/l(with CaCO
3Meter), pH value is between 7～8.2, and sewage is introduced settling tank behind nitrated device.Return the denitrification section through oettIed sewage by 7: 1 reflux ratio and carry out the denitrification processing, redundance is discharged settling tank, and settling tank mud is reverse back to nitrated device, to replenish its mud deficiency.
2, with the nitrated device of soft-filler bed described in the embodiment 1, change activated sludge tank into, repeat the method for embodiment 1.
3, adopt equipment and the processing method of embodiment 1 or embodiment 2, but sewage added the glucose growth hormone of 5mg/l before entering nitrated device.
Claims (6)
1, a kind of denitrogenation method of nitric wastewater, it comprises nitrated, denitrification, precipitation process, it is characterized in that: nitric wastewater is introduced into the denitrification device, adds NaHCO then
3The pH value of adjusting sewage is 5～9, and basicity is (with CaCO
3Meter) be on the 100mg/l, introduce nitrated device, introduce settling tank again, through oettIed sewage by 5～10: 1 reflux ratio is drawn back the denitrification device, rest part discharge, settling tank mud directly draws back nitrated device.
2, the denitrogenation method of nitric wastewater according to claim 1 is characterized in that: sewage added the glucose that is not more than 5mg/l before introducing nitrated device.
3, the denitrogenation method of nitric wastewater according to claim 1 and 2 is characterized in that: sewage added NaHCO before introducing nitrated device
3Transferring the pH value of sewage is 7～8.2, and basicity is greater than 150mg/l, is back to the denitrification device through sedimentary sewage by 7: 1 reflux ratio.
4, the specific equipment of the denitrogenation method of nitric wastewater according to claim 1 is characterized in that, denitrification device, nitrated device are the soft-filler beds, and activated sludge absorption is on soft-filler.
5, the specific equipment of the denitrogenation method of nitric wastewater according to claim 1, it is characterized in that: the denitrification device is the soft-filler bed, nitrated device is an activated sludge tank, and denitrifying activated sludge is adsorbed on the soft-filler, and nitrifying activated sludge places sludge sump.
6, according to the specific equipment of the denitrogenation method of claim 4 or 5 described nitric wastewaters, the soft-filler that it is characterized in that described soft-filler bed is the line segment that fibrous chemical fibre thing twists into, compile and make on the well rope rope, soft-filler bed comprises the well rope rope of a plurality of suspensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89107208A CN1021964C (en) | 1989-09-17 | 1989-09-17 | Denitrifying method of high nitrogen-containing sewage and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89107208A CN1021964C (en) | 1989-09-17 | 1989-09-17 | Denitrifying method of high nitrogen-containing sewage and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040775A true CN1040775A (en) | 1990-03-28 |
| CN1021964C CN1021964C (en) | 1993-09-01 |
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ID=4857095
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89107208A Expired - Fee Related CN1021964C (en) | 1989-09-17 | 1989-09-17 | Denitrifying method of high nitrogen-containing sewage and its equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021964C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847790A (en) * | 2020-07-28 | 2020-10-30 | 阳江职业技术学院 | Integrated biological denitrification device and application method |
-
1989
- 1989-09-17 CN CN89107208A patent/CN1021964C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847790A (en) * | 2020-07-28 | 2020-10-30 | 阳江职业技术学院 | Integrated biological denitrification device and application method |
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| Publication number | Publication date |
|---|---|
| CN1021964C (en) | 1993-09-01 |
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