CN103043781A - Improved biological aerated filter - Google Patents
Improved biological aerated filter Download PDFInfo
- Publication number
- CN103043781A CN103043781A CN2012105508035A CN201210550803A CN103043781A CN 103043781 A CN103043781 A CN 103043781A CN 2012105508035 A CN2012105508035 A CN 2012105508035A CN 201210550803 A CN201210550803 A CN 201210550803A CN 103043781 A CN103043781 A CN 103043781A
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- CN
- China
- Prior art keywords
- main body
- baf
- water outlet
- improved
- packing layer
- 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.)
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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
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a separation device made of loose filter materials for liquid or gaseous fluids. An improved biological aerated filter (BAF) disclosed by the invention comprises a hollow main body with an opening at the top, wherein a packing layer is arranged at the upper part of the main body; a supporting layer is arranged at the lower part of the packing layer; a water outlet is formed in the lower part of the main body; a plurality of sampling ports are formed above the water outlet; in addition, the main body is further provided with an aeration port. The water effluent of the improved BAF can achieve the first-grade standard of Discharge Standards for Municipal Wastewater Treatment Plant, and the improved BAF has better denitrification capacity. With the increase of gas-water ratio, the removal rates of COD (Chemical Oxygen Demand) and TN (Total Nitrogen) are firstly increased and then decreased, and the removal rate of NH4<+>-N is increased gradually.
Description
Technical field
The present invention relates to a kind of separating device that forms for the loose filtering material of liquid state or gaseous fluid.
Background technology
BAF (biological aerated filter, BAF) is utilized bio-oxidation and filtration detention effect that sewage is absorbed and is decomposed, and its good decarburization nitrogen removal performance receives domestic and international researchist's concern always.The advantages such as simultaneously, initial cost is little, processing efficiency is high, convenient management also make it be particularly suitable for building in the small and medium-sized cities that lack of capital and sewage work transforms.
The strengthened denitrification function of BAF is the focus of this area research always, the concentration of nitrobacteria and active closely bound up in the removal of nitrogen and the reactor, and DO directly has influence on the biological activity of aerobic heterotrophic bacterium and nitrobacteria in the filter tank, and therefore guaranteeing to contain in the filter tank suitable dissolved oxygen concentration seems particularly important.Studies show that both at home and abroad, microorganism is at war with to DO and organic matter, easily in inner dissolved oxygen and the concentration of substrate gradient of forming of microbial film, dissimilar metabolism microorganisms occupy different spatial niches at filling space, gradually form dominant groups on water (flow) direction.Be easy to produce the nitrification and denitrification reaction and enter successively aerobic, anaerobic environment by the time sequence, particularly applicable to the sewage disposal of low carbon/nitrogen ratio.To the research of DO restriction in the reactor, find in reactor, to have short-cut nitrification and denitrification, synchronous nitration and denitrification Anammox, and the phenomenon such as autotrophic denitrification.Based on the significance of DO to biomembrane denitrogenation, research is found, DO is progressively ascendant trend among traditional upward flow BAF, the variation of DO increases first rear minimizing in the dirty BAF, DO is distributed with larger fluctuating, therefore adopts the lower research that improves nitric efficiency as with DO control of being more suitable for to stream BAF.At present, lower rarely have research to this operation scheme of stream BAF stage casing aeration.
Summary of the invention
The present invention aims to provide a kind of dissolved oxygen that can make along the modified version BAF of journey Gradient distribution.
Modified version BAF of the present invention comprises open-topped hollow body, and main body top is provided with packing layer, the packing layer bottom is supporting layer, lower body part is provided with water outlet, is provided with several thief holes more than the water outlet, and main body also is provided with aeration opening in addition.
Preferably, bottom part body is provided with mud discharging mouth.
Perhaps preferably, the top of main body also links to each other with former water tank, and the bottom also links to each other with the back-flushing water tank, and main body also is provided with the recoil water outlet in addition.
Modified version BAF of the present invention is 110-145.5 mg/L at influent COD, NH
4 +-N is 20.3-28.9 mg/L, and TN is 23.5-33.5 mg/L, when HRT is 8 h, can obtain the optimum handling effect under the gas-water ratio 10:1 condition.COD, NH
4 +-N and TN average removal rate are respectively 92.5%, 69.4% and 48.6%, and water outlet all reaches " urban wastewater treatment firm emission standard " first discharge standard, and preferably denitrification ability is arranged.Along with the increase of gas-water ratio, the removal of COD and TN takes the lead in increasing rear minimizing, NH
4 +The clearance of-N progressively increases.
Description of drawings
Fig. 1 is the structural representation of embodiment one.
Embodiment
Embodiment one.
The modified version BAF adopts synthetic glass to process, and is of a size of φ l50 mm x 1 500 mm.Be the biological ceramic particle of φ 3-5 mm in the packing layer 4, packed height is 1 200 mm, and the bottom is the high supporting layer of 50 mm 8, and water outlet is established thief hole 5 every 200 mm more than 7, totally 6.Establish aeration tube in the biological filter, aeration opening 6 is apart from water outlet 7500 mm, and aeration opening 6 tops are the aeration zone, and the bottom is the non-aeration district.During the BAF operation, air and sewage bifurcation road enter, and adopt gas, water associating back flushing, determine backwashing time and intensity by operating head polishing loss and treatment effect.Consider lower to the stream BAF easily stop up, the shortcoming such as back flushing is frequent, set up in addition back-purge system at the middle part, biological filter, carry out the method that the flushing of local backwash and integral inverted is carried out simultaneously.Back flushing is spaced apart 14 d, each gas flushing intensity 6 L/ (m
2S), water backwash rate 4 L/ (m
2S), times 15 min.
Claims (3)
1. modified version BAF, comprise open-topped hollow body, it is characterized in that main body top is provided with packing layer (4), packing layer (4) bottom is supporting layer (8), lower body part is provided with water outlet (7), be provided with several thief holes (5) more than the water outlet (7), main body also is provided with aeration opening (6) in addition.
2. modified version BAF as claimed in claim 1 is characterized in that bottom part body is provided with mud discharging mouth (9).
3. modified version BAF as claimed in claim 1 or 2 is characterized in that the top of main body also links to each other with former water tank (1), and the bottom also links to each other with back-flushing water tank (2), and main body also is provided with recoil water outlet (7) (3) in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105508035A CN103043781A (en) | 2012-12-18 | 2012-12-18 | Improved biological aerated filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105508035A CN103043781A (en) | 2012-12-18 | 2012-12-18 | Improved biological aerated filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103043781A true CN103043781A (en) | 2013-04-17 |
Family
ID=48056673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105508035A Pending CN103043781A (en) | 2012-12-18 | 2012-12-18 | Improved biological aerated filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103043781A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974305A (en) * | 2022-12-09 | 2023-04-18 | 山东中欧膜技术研究有限公司 | Integrated membrane method water treatment system and treatment method |
-
2012
- 2012-12-18 CN CN2012105508035A patent/CN103043781A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974305A (en) * | 2022-12-09 | 2023-04-18 | 山东中欧膜技术研究有限公司 | Integrated membrane method water treatment system and treatment method |
| CN115974305B (en) * | 2022-12-09 | 2023-09-12 | 山东中欧膜技术研究有限公司 | Integrated membrane method water treatment system and treatment method |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |