CN115286098A - Denitrification filter tank system - Google Patents
Denitrification filter tank system Download PDFInfo
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- CN115286098A CN115286098A CN202210777623.4A CN202210777623A CN115286098A CN 115286098 A CN115286098 A CN 115286098A CN 202210777623 A CN202210777623 A CN 202210777623A CN 115286098 A CN115286098 A CN 115286098A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000001914 filtration Methods 0.000 claims abstract description 50
- 238000011001 backwashing Methods 0.000 claims abstract description 37
- 239000012528 membrane Substances 0.000 claims description 16
- 239000006004 Quartz sand Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000010865 sewage Substances 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Classifications
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2826—Anaerobic digestion processes using anaerobic filters
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a denitrification filter system which comprises a filter body, wherein the filter body is provided with a water distribution area, a filtering area and a backwashing drainage area, the water distribution area is communicated with a water inlet channel, and the water distribution area is provided with two water distribution modes adopting V-shaped structures and respectively positioned at the tops of two sides of the filter body; and two filtering areas are arranged and are respectively positioned at two sides of the backwashing drainage area. According to the denitrification filter system, organic matters are used as a carbon source, and nitrate nitrogen of inlet water is reduced into nitrogen, so that the purpose of removing total nitrogen is achieved; in addition, the filter tank also has the function of filtration and interception, and the SS of the effluent is reduced.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a denitrification filter tank system.
Background
The improvement of the discharge standard of urban sewage treatment is great tendency. From the requirement of improving the quality of the current water environment, the effluent treated by a plurality of municipal sewage treatment plants is often discharged into a municipal river to become a water body of the river. The effluent of the existing sewage treatment plant in China has the discharge standard which is mainly referred to primary B or primary A in GB18918-2002 discharge Standard of pollutants for municipal wastewater treatment plants. However, for the class B or class A standard, the quality of water is only equivalent to the poor class V water of surface water. The water quality is discharged into a water body environment without self-purification capacity, so that the water body is not repaired but polluted, and the phenomenon of 'treating more and more dirty' appears. The water pollution is increasingly aggravated, and the effluent of a sewage treatment plant is urgently required to reach the IV-class standard of the surface class.
The denitrification basic principle of the denitrification biological filter is that denitrification bacteria in a biological membrane reduce nitrate nitrogen of inlet water into nitrogen by using organic matters as a carbon source so as to achieve the purpose of removing total nitrogen; in addition, the filter tank also has the function of filtration and interception, and the SS of the effluent is reduced. The technology has the advantages of large biomass, various functions, flexible process, small investment, small land occupation and the like.
The A2O + denitrification filter tank process which is used for upgrading and transforming the urban sewage at present has the following problems: 1) A large amount of carbon sources are required to be added in the denitrification process of the denitrification filter tank, so that the operation cost of a sewage plant is greatly increased; 2) In the A2O aerobic zone, the nitrification rate is reduced along with the reduction of the water temperature in winter, so that the ammonia nitrogen in effluent exceeds the standard; 3) The aerobic nitrification and aeration of the A2O biochemical tank have high energy consumption and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a denitrification filter tank system which has the advantages of large biomass, multiple functions, flexible process, small investment, small land occupation and the like.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a denitrification filter system comprises a filter body, wherein the filter body is provided with a water distribution area, a filtering area and a backwashing drainage area, the water distribution area is communicated with a water inlet channel, and the water distribution area is provided with two water distribution modes adopting a V-shaped structure and respectively positioned at the tops of two sides of the filter body; two filtering areas are arranged and are respectively positioned at two sides of the backwashing drainage area; the denitrification filter system is also provided with a biological membrane, the biological membrane is hung on the membrane through an installation rack, and the biological membrane is arranged in the filtering area and the backwashing drainage area through the installation rack.
As a further improvement of the technical scheme:
preferably, the filtering area is provided with three layers, namely a biological filtering layer, a quartz sand filtering material layer and a supporting layer from top to bottom, an integral filtering plate is arranged below the filtering pool main body, and the integral filtering plate is positioned below the supporting layer.
Preferably, the diameter of the biomembrane disc is 7cm, the extension length of the fiber is 3cm, and the specific surface area is 320m 2 /m 3 。
Preferably, the interval between adjacent biological membranes in the same column is 10cm, the interval between adjacent midlines for hanging the biological membranes is 18cm, and 360 fillers/cube.
Preferably, the organism is present per unit areaFilm weight 40g/m 2 The amount of biofilm, per filler, was calculated to be 35.6 g/piece.
Preferably, the supporting layer is full of the flow holes.
Preferably, the back-washing water discharging area is provided with a back-washing water inlet pipe, a back-washing air inlet pipe, a water discharging valve and a back-washing waste water pipe; the backwashing water inlet pipe, the backwashing air inlet pipe and the water discharge valve are positioned below the backwashing water discharge area.
Compared with the prior art, the denitrification filter tank system provided by the invention has the following advantages:
according to the denitrification filter system, organic matters are used as a carbon source, and nitrate nitrogen of inlet water is reduced into nitrogen, so that the purpose of removing total nitrogen is achieved; in addition, the filter tank also has the function of filtration and interception, and the SS of the effluent is reduced. The denitrification filter tank system has the advantages of large biomass, multiple functions, flexible process, small investment, small land occupation and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The reference numbers in the figures illustrate:
1. a filter body; 2. a water distribution area; 3. a filtration zone; 4. backwashing the drainage area; 5. a biological filter layer; 6. a quartz sand filter material layer; 7. a support layer; 8. an integral filter plate; 9. backwashing the water inlet pipe; 10. backwashing the air inlet pipe; 11. backwashing the wastewater pipe; 12. a biofilm; 13. and (7) mounting a frame.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 shows an embodiment of the denitrification filter system of the present invention, the denitrification filter system includes a filter body 1, the filter body 1 is provided with a water distribution region 2, a filtration region 3 and a back flush water discharge region 4, the water distribution region 2 is communicated with a water inlet channel through a water inlet regulating valve, the water distribution region 2 is provided with two water distribution modes adopting V-shaped structures, and the two water distribution modes are respectively located at the top of two sides of the filter body 1 and are used for receiving raw water. Two filtering areas 3 are arranged and are respectively positioned at two sides of the backwashing drainage area 4, and the filtering areas 3 are positioned below the water distribution area 2.
In the embodiment, the filtering area 3 is provided with three layers, namely a biological filtering layer 5, a quartz sand filtering material layer 6 and a supporting layer 7 from top to bottom, an integral filtering plate 8 is arranged below the filter main body 1, the integral filtering plate 8 is positioned below the supporting layer 7, and a certain space is formed between the integral filtering plate 8 and the bottom of the filter main body. A bearing layer 7 of gravels is arranged below the quartz sand filtering material layer 6 and is used for supporting the biological filtering layer 5 and the quartz sand filtering material layer 6 and preventing the quartz sand from blocking the flow holes of the bearing layer 7.
In this embodiment, the backwash water discharge area 4 is provided with a backwash water inlet pipe 9, a backwash air inlet pipe 10, a water discharge valve, and a backwash wastewater pipe 11. The back washing water inlet pipe 9, the back washing air inlet pipe 10 and the water discharge valve are positioned below the back washing water discharge area 4. The treated water is discharged from the drain valve, and the backwashing wastewater is discharged from the backwashing wastewater pipe 11.
In this embodiment, denitrification filtering pond system still is equipped with biomembrane 12, and biomembrane 12 hangs the membrane through mounting bracket 13, and mounting bracket 13 adopts steel pipe and communicating pipe to constitute, and the dismouting of being convenient for is designed according to the area in pond. The biological membrane 12 is arranged on the filtering area 3 and the back washing drainage area 4 through the mounting frame 13, and the biological membrane 12 is positioned above the biological filtering layer 5 of the filtering area 3 and the air inlet pipe of the back washing drainage area 4. The diameter of the disc of the biological membrane 12 is 7cm, the extension length of the fiber is 3cm, and the specific surface area is 320m 2 /m 3 The porosity was 93%, and the amount of biofilm in a cubic filler was 35.6 × 360/1000=12.81g/L. After the carbon source is added, the biofilm 12 can remove nitrate nitrogen in the influent water and retain suspended matters in the influent water. Various kinds of carbon sources can be used, such as methanol, ethanol, acetic acid or sodium acetate. During operation, the microorganisms can utilize nitrate nitrogen in the influent water as an electron acceptor and consume an external carbon source. The microorganisms of the biofilm 12 consume the nitrate nitrogen in the influent water due to the specific denitrification environment maintained in the filter system, so that the DO of the treated effluent is typically less than 0.5mg/L. The external carbon source can be used as an electron donor to promote the removal of nitrate nitrogen, and finally the nitrate nitrogen can be N 2 Is discharged.
The denitrification filter system of the embodiment, a specific water treatment process, comprises the following steps:
step one, a filtering process, namely, raw water enters a filtering area 3 through a V-shaped water distribution area 2, is downwards filtered under the action of gravity, passes through a biological filtering layer 5, a quartz sand filtering material layer 6 and a supporting layer 7 in sequence, and is discharged from the bottom of the supporting layer 7;
step two, in the nitrogen-expelling process, the water inlet is closed, the liquid level of the filtering area 3 keeps a certain height, the backwashing water enters the bottom of the filter body through the backwashing water inlet pipe 9 and then enters the biological filtering layer 5 upwards, and nitrogen bubbles accumulated in the quartz sand filtering material layer 6 are expelled;
step three, a back flushing process, wherein back flushing air firstly enters the bottom of the filter body through a back flushing air inlet pipe 10; and back washing water enters the bottom of the filter body through a back washing water inlet pipe 9 and then enters the biological filter layer 5 to clean the filter area 3, and the back washing wastewater is filtered by a biological membrane 12 at the top of the biological filter layer 5 and in the back washing drainage area 4 and then is discharged through a back washing wastewater pipe 11.
Example 1
The nitrate nitrogen to be removed is 2mg/L, and the available tank capacity of the filter tank body 1 is
13.9*2.5*1.2*2+12*1*1.2＝97.8m 3 Effective volume is 12 (1.2 x 2.4 x 2+ 1) =81.12m 3 Designing the water filtration amount of a single group of filtration areas to be 521m 3 The filtration rate is 5.97m/h. The residence time in the filtration zone is about
13.9 × 3.4 × 2.5 × 2/520 × 60=27min, the residence time of the biofiltration layer is about 100/520 × 60=11.5min.
The total microbial quantity and the sludge concentration in the effective tank volume which need to be reached after film formation are as follows: the diameter of the disc is 7cm, the extension length of the fiber is 3cm, and the specific surface area is 320m 2 /m 3 The porosity was 93%. And (3) mounting parameters: the disks were 10cm apart, the median line was 18cm apart, and 360 fillers/cube. Biofilm weight per unit area of 40g/m 2 Calculated, the amount of biofilm of the individual fillers was 35.6 g/piece, and the total amount of microorganisms was 35.6 × 360 × 81.12=1039.15kg. The amount of the biofilm in one cubic filler is 35.6 × 360/1000=12.81g/L, namely the sludge concentration in the effective tank volume is 12.81g/L.
Setting the denitrification rate of the denitrification tank to be 0.62 mg/(g x h), removingThe removed nitrate nitrogen is 0.62X 12.81X 12/60=1.59mg/L, the retention time is 15min, the amount of the removed nitrate nitrogen is 2mg/L,400m 3 (ii) a At 20min, the nitrate nitrogen removal amount is 2.65mg/L,300m 3 (ii) a At 30min, the nitrate nitrogen removal amount is 3.97mg/L at 200m 3 。
The adding amount of the carbon source is 20mgCOD/L, and the water treatment amount is 521m according to a single group 3 And (4) calculating the required dosage of 50 percent of carbon source by 0.5 ton/day. The effective storage tank volume of the denitrification filter system is 2000L. The available period is 4 days.
The above embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (7)
1. A denitrification filter system is characterized by comprising a filter body, wherein the filter body is provided with a water distribution area, a filtering area and a backwashing drainage area, the water distribution area is communicated with a water inlet channel, and the water distribution area is provided with two water distribution modes adopting V-shaped structures and respectively positioned at the tops of two sides of the filter body; two filtering areas are arranged and are respectively positioned at two sides of the backwashing drainage area; the denitrification filter system is also provided with a biological membrane, the biological membrane is hung on the membrane through an installation rack, and the biological membrane is arranged in the filtering area and the backwashing drainage area through the installation rack.
2. The denitrification filter system according to claim 1, wherein the filtering zone is provided with three layers, from top to bottom, a biological filtering layer, a quartz sand filtering material layer and a supporting layer, an integral filtering plate is arranged below the filter body, and the integral filtering plate is positioned below the supporting layer.
3. A denitrification filter system according to claim 1, wherein the support layer is lined with flow holes.
4. A denitrification filter system according to claim 3, wherein the biofilm disk has a diameter of 7cm, a fiber extension of 3cm and a specific surface area of 320m 2 /m 3 。
5. The denitrification filter system according to claim 4, wherein the adjacent biofilms in the same row are spaced by 10cm, and the adjacent centerlines for hanging the biofilms are spaced by 18cm and 360 fillers/cube.
6. A denitrification filter system according to claim 4, wherein the biofilm has a weight per unit area of 40g/m 2 The amount of biofilm, per filler, was calculated to be 35.6 g/piece.
7. The denitrification filter system according to claim 1, wherein the backwash water discharge area is provided with a backwash water inlet pipe, a backwash air inlet pipe, a water discharge valve and a backwash wastewater pipe; the backwashing water inlet pipe, the backwashing air inlet pipe and the water discharge valve are positioned below the backwashing water discharge area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210777623.4A CN115286098A (en) | 2022-07-04 | 2022-07-04 | Denitrification filter tank system |
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| CN202210777623.4A CN115286098A (en) | 2022-07-04 | 2022-07-04 | Denitrification filter tank system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115990A (en) * | 2020-03-13 | 2020-05-08 | 广东正诚环境科技有限公司 | Denitrification filter tank system |
| CN212425578U (en) * | 2020-03-16 | 2021-01-29 | 中交（天津）生态环保设计研究院有限公司 | Denitrification biological filter for secondary treatment of dredged residual water and filtering system |
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- 2022-07-04 CN CN202210777623.4A patent/CN115286098A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115990A (en) * | 2020-03-13 | 2020-05-08 | 广东正诚环境科技有限公司 | Denitrification filter tank system |
| CN212425578U (en) * | 2020-03-16 | 2021-01-29 | 中交（天津）生态环保设计研究院有限公司 | Denitrification biological filter for secondary treatment of dredged residual water and filtering system |
Non-Patent Citations (1)
| Title |
|---|
| 兰书林等: "《新编农村能源应用技术》", 中原农民出版社, pages: 109 * |
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