CN1349937A - Isolated aeration biomembrane process - Google Patents
Isolated aeration biomembrane process Download PDFInfo
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- CN1349937A CN1349937A CN00131548A CN00131548A CN1349937A CN 1349937 A CN1349937 A CN 1349937A CN 00131548 A CN00131548 A CN 00131548A CN 00131548 A CN00131548 A CN 00131548A CN 1349937 A CN1349937 A CN 1349937A
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- Prior art keywords
- aeration
- isolating cylinder
- isolated
- area
- biomembrance process
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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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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to an isolated aerator using bio-membrane method, which is characterized by that it adopts at least one isolation barrel to divide the aeration tank of bio-membrane method or bio-chemical aeration filter tank into aeration area and filler area, and the interior of the isolation barrel is the aeration area, and the exterior of the isolation barrel is the filler area, and the internal bottom of the isoaltion barrel is equipped with an aerating head, and its bottom side is equipped with water back-flow window, and its top is sunk in the water. Said invention can raise sewage treatment efficiency.
Description
The present invention relates to the isolated aeration of biomembrance process, specifically, relate to the aeration tank of biomembrance process or the isolated aeration of biochemical aerating filter, belong to sewage disposal technology.
In sewage treatment facility, the aeration tank of the biomembrance process of prior art or biochemical aerating filter have adopted the bottom aeration mode, evenly lay at the bottom of the pond or gradient laying aeration head, and directly filler or the filtrate to its top carries out aeration, the processing efficiency of this aeration mode is low, and its reason is:
1. because the obstruct and the aeration head tolerance of filler are unbalanced, cause aeration inhomogeneous; In the big zone of aeration intensity, washed away by the fierceness of bubble, biomass are difficult to adhere to the formation microbial film on filler, the situation of " naked body " filler occurred, have reduced processing efficiency.
2. the zone such as little or aeration dead angle at aeration rate, the stirring and the disturbance of water are little, thickness of diffusion layer between microbial film and water increases, diffusion layer thickens and must reduce microbial film and absorb the dissolved oxygen of aqueous phase and pollutent and biochemical metabolism product and discharge into the speed of water body, thereby has reduced biomembranous processing efficiency.
3. also exist the low problem of transmission efficiency of oxygen for the sewage treatment facility of employing high-density packing such as biochemical aerating filter.In the aerobic treatment, the resistance of oxygen transfer is from the transmission of oxygen between gas-liquid two-phase.The utilization ratio that improves oxygen is to increase effectively the contact area and the duration of contact of gas-liquid two-phase.Directly aeration is carried out in the packing area, aeration head can produce small air filled cavity, under the stopping of underfilling, accumulates bigger bubble, has reduced the contact area of air and water significantly.Biomembranous continuous growth can progressively cause the regional resistance of some of filler to become big, finally forces air to be escaped from limited path, forms channel, and the further like this surface-area that reduces air makes the short stream of the air water body that speeds away again.The bottom aeration mode had both reduced the surface-area of air, had reduced air water biphase duration of contact again, had reduced the utilization ratio of oxygen.
Purpose of the present invention is intended to overcome the defective of prior art and a kind of aeration mode of providing, claims isolated aeration.
The objective of the invention is to be achieved through the following technical solutions: a kind of isolated aeration of biomembrance process is characterized in that adopting at least 1 isolating cylinder that the aeration tank or the biochemical aerating filter of biomembrance process are divided into aeration zone and packing area; In the isolating cylinder is the aeration zone, and tube is outer to be the packing area; The isolating cylinder inner bottom part is equipped with aeration head, and the bottom side offers the water back window, and the top is submerged in the water.Described isolating cylinder can adopt the polyvinyl chloride pipe, is fixed on the stuffing frame; The cross-sectional area sum of each isolating cylinder accounts for this pool area 4～10% in the pond, and optimum value is 6～8%, and principle is selected the cross-sectional area and the number of isolating cylinder according to this.
Water during aeration in the isolating cylinder obtains oxygenation, and under the lifting of bubble, forming with the isolating cylinder is vertical water circulation at center, makes processed sewage constantly by aeration zone and packing area, carries out the process of aeration aerating-reaction degraded repeatedly, as shown in Figure 1.By the control of aeration rate, adjust water body oxygenation and microbial film sluicing intensity, dissolved oxygen concentration and biomembranous growth are controlled effectively.
Adopt isolated aeration technology of the present invention, the aeration bubble is without the packing area, and microbial film no longer is subjected to washing away of bubble, " naked body " filler can not occur.Because the castering action of bubble is to form stable pool inner water cycling stream in whole oxidation pond, makes the longitudinal stream scooter 0.2～0.3m/s of water, has so just reduced the interfacial diffusion layer, has eliminated the situation of diffusional resistance microbiostatic activity.Adopt the isolated aeration technology, both reduced diffusional resistance, prevented that again bubble from washing away biomembranous, make the filler in the whole oxidation pond can both form the high-activity biological film, reached the purpose that pollutent is efficiently handled.
The drawing of accompanying drawing is described as follows:
Fig. 1 is isolating cylinder and outer filler thereof.Aeration head 3 provides oxygen during aeration, water in the isolating cylinder 1 obtains oxygenation, and under the lifting of bubble, formation is vertical water circulation at center with isolating cylinder 1, make processed sewage as shown by arrows and through back window 4 constantly by tube in packing area 2 outside aeration zone and the tube, carry out the process that aeration aerating-reaction is degraded repeatedly.
Fig. 2 is the isolating cylinder layout drawing of the embodiment of the invention 1.
Below in conjunction with embodiment and conjunction with figs. technical scheme of the present invention is done further statement.
Embodiment 1
The biochemical aeration tank useful volume 720l that makes, the oil refining sewerage amount 150l/h of processing refinery, total aeration rate 600l/h.The floor plan of isolating cylinder is seen Fig. 2, is evenly distributed with 6 isolating cylinders 1 in the biochemical aeration tank 5, the cross-sectional area sum 470cm of each isolating cylinder
2, pool area 7200cm
2, the cross-sectional area sum of each accounts for pool area 6.5%.Biochemical oxygen demand (BOD) COD clearance is more than 75%, improves 20～30 percentage points than the biochemistry pool clearance of conventional aeration mode; Volume load reaches 0.6KgBOD
5/ m
3, be 1.6 times of conventional aeration mode.
Among Fig. 2, the 2nd, packing area, the 3rd, aeration head.
Technology of the present invention is applied to " Biological Pretreatment of stripping phenolic wastewater " pilot scale and has obtained good result equally.This pilot plant adopts the tower biological filter as biochemical device (longitudinal diagram is referring to Fig. 1), this tower virtual height 120cm, and tower diameter 40cm, isolating cylinder diameter 11cm adopts the multiaspect hollow ball to make filler; The flow 100l/h that disposes of sewage, hydraulic detention time 1.5h, former water volatile phenol concentration 100～150mg/l handles back concentration below 20mg/l, and contrast experiment's ordinary biofilter is handled back concentration and is not less than 50mg/l.
Claims (4)
1. the isolated aeration of a biomembrance process is characterized in that adopting at least 1 isolating cylinder that the aeration tank or the biochemical aerating filter of biomembrance process are divided into aeration zone and packing area; In the isolating cylinder is the aeration zone, and tube is outer to be the packing area; The isolating cylinder inner bottom part is equipped with aeration head, and the bottom side offers the water back window, and the top is submerged in the water.
2. by the isolated aeration of the described biomembrance process of claim 1, it is characterized in that the cross-sectional area sum of each isolating cylinder in the pond accounts for this pool area 4-10%, optimum value is 6-8%.
3. by the isolated aeration of the described biomembrance process of claim 1, it is characterized in that described isolating cylinder polyvinyl chloride pipe, be fixed on the stuffing frame.
4. by the isolated aeration of the described biomembrance process of claim 1, it is characterized in that adopting the multiaspect hollow ball to make filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00131548A CN1349937A (en) | 2000-10-24 | 2000-10-24 | Isolated aeration biomembrane process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00131548A CN1349937A (en) | 2000-10-24 | 2000-10-24 | Isolated aeration biomembrane process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1349937A true CN1349937A (en) | 2002-05-22 |
Family
ID=4594720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00131548A Pending CN1349937A (en) | 2000-10-24 | 2000-10-24 | Isolated aeration biomembrane process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1349937A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776545A (en) * | 2016-05-10 | 2016-07-20 | 张振家 | Biological sewage treatment aeration tank with fixed filler layer |
| CN108946926A (en) * | 2018-08-01 | 2018-12-07 | 江苏艾特克环境工程有限公司 | A kind of biochemical reactor based on MBF filler |
| CN114180711A (en) * | 2021-12-08 | 2022-03-15 | 西安聚光环保科技有限公司 | Biochemical treatment device for high-salt-content wastewater |
-
2000
- 2000-10-24 CN CN00131548A patent/CN1349937A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776545A (en) * | 2016-05-10 | 2016-07-20 | 张振家 | Biological sewage treatment aeration tank with fixed filler layer |
| CN108946926A (en) * | 2018-08-01 | 2018-12-07 | 江苏艾特克环境工程有限公司 | A kind of biochemical reactor based on MBF filler |
| CN108946926B (en) * | 2018-08-01 | 2021-11-02 | 江苏艾特克环境工程有限公司 | Biochemical reactor based on MBF filler |
| CN114180711A (en) * | 2021-12-08 | 2022-03-15 | 西安聚光环保科技有限公司 | Biochemical treatment device for high-salt-content wastewater |
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| WD01 | Invention patent application deemed withdrawn after publication |