CN103663690A - Sewage treatment bioreactor - Google Patents
Sewage treatment bioreactor Download PDFInfo
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- CN103663690A CN103663690A CN201210344170.2A CN201210344170A CN103663690A CN 103663690 A CN103663690 A CN 103663690A CN 201210344170 A CN201210344170 A CN 201210344170A CN 103663690 A CN103663690 A CN 103663690A
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Abstract
The invention provides a sewage treatment bioreactor which comprises a strong fluidization region, a weak fluidization region, a facultative anaerobic region and an air release region, wherein the strong fluidization region is positioned on the lower part of the reactor, and comprises a strong fluidization region shell, a gas distributor, a guide shell and a biocarrier; the weak fluidization region is positioned on the middle part of the reactor, and comprises a weak fluidization region perforated column plate, a biocarrier and a weak fluidization region shell; the facultative anaerobic region and the air release region are annularly arranged in a mode of concentric circles; the facultative anaerobic region is arranged around the air release region; both the facultative anaerobic region and the air release region are positioned on the top of the reactor; the air release region comprises a perforated cone and an inner shell; and the inner shell penetrates through a circular hole at the center of the facultative anaerobic region perforated column plate with the same external diameter as the inner shell. The bioreactor can effectively reduce the height of the guide shell and lower the fluidization energy consumption, and is beneficial to industrialization of equipment.
Description
Technical field
The invention belongs to field of Environment Protection, relate to a kind of bioreactor for sewage treatment, mainly for the treatment of petrochemical effluent and waste industrial water from light industry.
Background technology
Along with the development of China's city size and improving constantly of industrialization degree, produce a large amount of unmanageable industry and sanitary sewage, sewage work is faced with stern challenge, industrial sewage process field particularly, quantity of wastewater effluent is large, and water quality is complicated, toxicity is large, and ammonia nitrogen, COD are higher.Traditional sewage treatment process efficiency is low, long flow path, and investment and process cost are high.
Aerobic fluidized-bed bioreactor aspect ratio is large, and floor space is little, and in reactor, in high speed internal recycle state, sewage treating efficiency is high, strong shock resistance, and the residence time is short, has a extensive future.But this technological development two during the last ten years, majority only stops at laboratory study or the test of sewage disposal field pilot test, seldom there is enterprise that this technique is carried out to industrialization, one of them chief reason is exactly that traditional biological fluidized bed lab scale and pilot scale fluid effect is better, but high more a lot of than middle-size and small-size testing apparatus during industrialization, filler is streamed to bottom from the eminence in reactor needs to consume very macro-energy, therefore the energy consumption of blower fan can increase greatly during industrialization, even so be also difficult to make completely filler to carry out high speed inner circulation fluidized, wastewater treatment efficiency also can be affected.
Chinese patent application CN2154859 discloses a kind of effective integrated water treatment device, collection jet-flow aeration, and carrier fluidisation, settling tank are integrated, and without any external device, simplified equipment, reduces and takes up an area.But this equipment guide shell is higher, and adopts jet-flow aeration, and energy consumption and process cost are high, are difficult for industrialization.
Chinese patent application CN1055161 discloses a kind of hypomere for the fluidized-bed with guide shell, includes gac and active sludge, and epimere is the fixed bed of the soft filler of fibre-bearing.The advantage of this method is operate continuously, and processing power is large.Shortcoming is that fiber soft packing easily ruptures, and renewals that cannot come off of the inner microbial film of filler, needs constantly replacing novel vector.
Chinese patent application CN2760018 discloses a kind of with double outer circulation biological fluidized bed effluent treatment plant, it comprises main bed and the secondary bed that be arranged in parallel and be communicated with up and down, effect by a water circulating pump makes waste water between major-minor bed, carry out fluidisation, the utility model adopts sequencing batch operation mode, the anaerobic and aerobic process that can hocket is processed waste water, reaches good treatment effect.Shortcoming is this technique industrializing implementation difficulty, and space waste is many, and waste water and filler circulating consumption between two beds is larger.
Chinese patent application CN201068420 discloses a kind of biological fluidized bed reactor for raising mixed gas and liquid, reactor body is provided with water distributor, biologic packing material layer, micro-pore aeration ring, reaction chamber dividing plate, reverse-flow baffle, bio-carrier, trapezoidal refluxing opening, the applicable high-performance bio of the utility model is processed high-ammonia-nitrogen sewage, can realize efficient denitrification, simultaneously save energy.But this structure of reactor is too simple, sewage disposal load is not high, and the honeycomb type filler that top biologic packing material layer adopts easily forms dead band, biofilm detachment difficulty.
Summary of the invention
The invention provides a kind of bioreactor for sewage treatment, large to overcome traditional biological treatment technology gas-water ratio, energy consumption is high, the shortcoming of industrialization difficulty.Adopt reactor of the present invention can effectively reduce the height of guide shell, thereby be conducive to industrialization promotion, be applicable to processing oil refining and the chemical engineering sewage of high density, also can process waste industrial water from light industry and municipal effluent.
Bioreactor for sewage treatment provided by the invention comprises that strong fluidization regions, weak fluidization regions, aerobic area and air discharge four, district part.Wherein, high current district is positioned at reactor lower part, comprise strong fluidization regions cylindrical shell, gas distributor, guide shell and bio-carrier, gas distributor is arranged on the bottom of strong fluidization regions cylindrical shell, guide shell is positioned at directly over gas distributor, the center of gas distributor and the central shaft of guide shell are on an axis, and bio-carrier is positioned at the space that strong fluidization regions cylindrical shell surrounds, weak current district is positioned at reactor middle part, comprises weak fluidization regions band hole column plate, bio-carrier and weak fluidization regions cylindrical shell, keeps a determining deviation between column plate, the space that a little less than bio-carrier is positioned at, fluidization regions cylindrical shell and column plate surround, aerobic area and air discharge district and are concentric ring-shaped setting, aerobic area discharges district around air and arranges, all be positioned at reactor head, aerobic area comprises aerobic area cylindrical shell and aerobic area band hole column plate, aerobic area cylindrical shell is identical with weak fluidization regions cylindrical shell internal-and external diameter, air discharges district and comprises a cone cylinder with holes and an inner core, cone cylinder end diameter with holes is identical with inner diameter of steel flue, and be connected with inner core bottom, large end is connected with weak fluidization regions band hole column plate, the large end of cone cylinder with holes external diameter equates with weak fluidization regions cylinder internal diameter, inner core passes with the circular hole that inner core external diameter equates from band hole column plate center, aerobic area.
Described weak fluidization regions cylindrical shell comprises one section of cone cylinder and one section of straight tube, and cone cylinder small end is connected with top, strong fluidization regions by a band hole column plate equal with cone cylinder end diameter, and the large end of cone cylinder is connected with straight tube lower end.
On described band hole column plate, have a plurality of cylinder holes, arranging of cylinder hole be take column plate center as the center of circle, form a plurality of concentric(al) circless, cylinder hole inwall has 45～75 degree inclination angles, vergence direction is consistent with the concentrically ringed tangential direction in place, vergence direction can be all clockwise direction, also can be all counterclockwise, and percentage of open area is 5%～20%.The cross section of cylinder hole is circular or square, and cross section is that circular cylinder hole is called circular cylindrical shape hole, and the aperture in circular cylindrical shape hole is 10～20mm, and cross section is that square cylinder hole is called square column hole, and the cross section length of side in square column hole is 8～15mm.Band hole column plate thickness is 10～30mm, and tray spacing is from being 0.2～2m.
On described cone cylinder with holes, have a plurality of holes, hole is circular hole or square hole, and Circularhole diameter is 10～20mm, and the length of side of square hole is 8～15mm, and percentage of open area is 10%～20%.
Described inner core top and reactor top maintain an equal level, and inner diameter of steel flue is 30%～60% of aerobic area barrel diameter.
Described weak fluidization regions barrel diameter is 1.2～2 times of strong fluidization regions barrel diameter.
The cumulative volume of the bio-carrier in described strong fluidization regions accounts for 10%～40% of strong fluidization regions cumulative volume, and in weak fluidization regions, bio-carrier volume accounts for 10%～30% of weak fluidization regions cumulative volume.
Compared with prior art, tool has the following advantages in the present invention:
1) reactor of the present invention is provided with a plurality of fluidization regions such as strong fluidization regions, weak fluidization regions, aerobic area and air release district, can effectively reduce guide shell height, compare traditional biological fluidized-bed, can reduce guide shell height 50% left and right, reduce fluidisation energy consumption, be conducive to the industrialization of equipment; Can improve reactor aspect ratio 20%～30%, save floor occupying area 20%～35% simultaneously.The subregion fluidisation of carrier, has reduced each carrier fluidisation path, effectively reduces energy consumption;
2) in reactor, dissolved oxygen changes in gradient, is conducive to nitrification and denitrification reaction and carries out in a reactor simultaneously;
3) nitration denitrification reaction not only can be carried out in aerobic area, and can muddy water is slightly separated, has reduced the load of follow-up equipment;
4) this equipment convenient disassembly, maintenance cylinder is single, and intellectualized operation is saved cost of labor.
In order further to improve wastewater treatment efficiency, described guide shell bottom has a plurality of cylinder holes, downward-sloping 45～75 degree angles of each cylinder hole inwall, and vergence direction is for to be tilted to outer wall by guide shell inwall, and percentage of open area is 5%～20%.The cross section of cylinder hole is circular or square, and cross section is that circular cylinder hole is called circular cylindrical shape hole, and the aperture in circular cylindrical shape hole is 10～20mm, and cross section is that square cylinder hole is called square column hole, and the cross section length of side in square column hole is 8～15mm; Cylinder hole is opened in guide shell bottom, can mass transfer enhancement, promote the mixing between gas-liquid two-phase.
Described guide shell can have one or more, and a guide shell if is positioned at the center of strong fluidization regions; A plurality of guide shells if are being uniformly distributed in strong fluidization regions, and a plurality of guide shells are by a plurality of gas distributors of correspondence, and guide shell quantity is identical with gas distributor quantity, the center of each gas distributor with corresponding guide shell central shaft on an axis.
After system is impacted, reactor easily produces foam, and for foam concentrations is processed, described air discharges inner core top, district the running water pipe of right-angled intersection is housed, and tap water spray head is evenly installed on running water pipe.
Described reactor head cylindrical shell outer rim can be managed orchid, so that configuration waste gas closed processes system avoids producing secondary pollution.
Accompanying drawing explanation
Fig. 1 is reactor list guide shell structural representation of the present invention;
Fig. 2 is weak fluidization regions tower plate structure schematic diagram;
Fig. 3 is aerobic area tower plate structure schematic diagram;
Fig. 4 is that guide shell opening axis is to cross-sectional schematic;
Fig. 5 is that air discharges district shower nozzle installation position figure;
Fig. 6 is the guide shell strong fluidization regions of reactor cylindrical shell cross section view while being 4;
Fig. 7 is that column plate opening axis is to cross-sectional schematic.
In figure: 1-sewage opening for feed, the strong fluidization regions of 2-cylindrical shell, 3-gas distributor, 4-guide shell, the weak fluidization regions of 5-band hole column plate, 6-aerobic area band hole column plate, 8-cone cylinder with holes, 9-aerobic area cylindrical shell, 10-top flange, the weak fluidization regions of 11-cone cylinder, square cylinder hole on 12-column plate, 13-tap water spray head, 14-running water pipe, the weak fluidization regions of 15-cylindrical shell, 16-inner core, square cylinder hole on 17-guide shell, 18-water outlet, 19-guide shell inwall, 20-guide shell outer wall, 21-column plate upper surface, 22-column plate lower surface.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, bioreactor for sewage treatment main body of the present invention is provided with strong fluidization regions from top to bottom successively, weak fluidization regions, aerobic area, air discharges district, wherein, high current district is positioned at reactor lower part, comprise strong fluidization regions cylindrical shell 2, gas distributor 3, guide shell 4 and bio-carrier, gas distributor 3 is arranged on the bottom of strong fluidization regions cylindrical shell 2, guide shell 4 is positioned at directly over gas distributor 3, and the central shaft of the center of gas distributor 3 and guide shell 4 is on an axis, and bio-carrier is positioned at the space that strong fluidization regions cylindrical shell 2 surrounds, weak current district is positioned at reactor middle part, comprises weak fluidization regions band hole column plate 5, bio-carrier and weak fluidization regions cylindrical shell 15, keeps a determining deviation between column plate, the space that a little less than bio-carrier is positioned at, fluidization regions cylindrical shell 15 and column plate surround, aerobic area and air discharge district and are concentric ring-shaped setting, aerobic area III discharges district around air and arranges, all be positioned at reactor head, aerobic area comprises aerobic area cylindrical shell 9 and aerobic area band hole column plate, aerobic area cylindrical shell 9 is identical with weak fluidization regions cylindrical shell 15 internal-and external diameters, air discharges district and comprises 8 and inner cores 16 of a cone cylinder with holes, cone cylinder with holes 8 end diameters are identical with inner core 16 diameters, and be connected with inner core 16 bottoms, large end is connected with weak fluidization regions band hole column plate 5, the large end external diameter of cone cylinder 8 with holes equates with weak fluidization regions cylindrical shell 15 internal diameters, the circular hole (seeing Fig. 3) that inner core 16 equates with inner core 16 external diameters from column plate center, aerobic area passes,
Described weak fluidization regions cylindrical shell 15 comprises one section of cone cylinder and one section of straight tube, and cone cylinder small end is connected with top, strong fluidization regions by a band hole column plate, and the large end of cone cylinder is connected with straight tube lower end;
On described cone cylinder 8 with holes, have a plurality of square holes, the length of side of square hole is 8～15mm, and percentage of open area is 10%～20%, on certain cone cylinder 8 with holes, also can open circular hole;
Described inner core 16 tops and reactor top maintain an equal level, and inner core 16 diameters are 30%～60% of aerobic area cylindrical shell 9 diameters;
The diameter of described weak fluidization regions cylindrical shell 15 is 1.2～2 times of diameter of strong fluidization regions cylindrical shell 2.
As shown in Fig. 2～4 and Fig. 7, on described band hole column plate, have a plurality of square columns hole, the cross section length of side of cylinder hole is 8～15mm, arranging of cylinder hole be take column plate center as the center of circle, form a plurality of concentric(al) circless, cylinder hole inwall has 45～75 degree inclination angles, inclination angle is b, vergence direction is consistent with the concentrically ringed tangential direction in place, vergence direction can be all clockwise direction, also can be all counterclockwise, percentage of open area is that 5%～20%, Fig. 7 has provided on column plate square cylinder hole 12 with respect to the vergence direction schematic diagram of column plate upper surface 21, column plate lower surface 22.Band hole column plate thickness is 10～30mm, and tray spacing is from being 0.2～2m; Described guide shell bottom has a plurality of square columns hole, the cross section length of side of cylinder hole is 8～15mm, downward-sloping 45～75 degree angles of each cylinder hole inwall, and inclination angle is a, vergence direction is to be tilted to water conservancy diversion drum outer wall 20 by guide shell inwall 19, and percentage of open area is 5%～20%.Above-mentioned cylinder hole can be also circular cylindrical shape hole.
As shown in Figure 5, reactor of the present invention is provided with running water pipe 14 and tap water spray head 13 on the inner core in air release district, and running water pipe 14 is cross-shaped, and tap water spray head 13 is uniformly distributed on it.
Fig. 6 is the guide shell strong fluidization regions of reactor cylindrical shell cross section view while being 4, and as seen from the figure, guide shell 4 is evenly distributed, the corresponding gas distributor 3 of each guide shell 4.
While carrying out sewage disposal, as shown in Figure 1, sewage enters reactor by sewage opening for feed 1, and air is inputted by gas distributor 3, and the cumulative volume of the bio-carrier in strong fluidization regions accounts for 10%～40% of strong fluidization regions cumulative volume, when equipment normally moves, this regional air velocity ratio is higher, and dissolved oxygen is sufficient, and the even fluidisation of bio-carrier distributes, on carrier, microbial film fully contacts with organism with the bacterium on active sludge, carries out fast biochemical degradation reaction.On the guide shell that open guide shell 4 bottoms, square cylinder hole 17 can promote the abundant mixing of gas-liquid two-phase.On sewage is further, be advanced into weak current district, in weak fluidization regions, bio-carrier volume accounts for 10%～30% of weak fluidization regions cumulative volume, it is large that this regional diameter becomes, during equipment operation, the stronger fluidization regions of gas-liquid-solid three-phase flow velocity reduces, aerobic biochemical reaction efficiency decreases, and the effect by weak fluidization regions band hole column plate 5 is uniformly distributed gas again, to guarantee dissolved oxygen distributed uniform, avoid producing dead band, gas-liquid-solid three-phase is full mixing fluidized state.It is up that sewage leaves weak fluidization regions, by cone cylinder 8 with holes, enter the aerobic area of reactor head, this region is not containing bio-carrier, during equipment operation, dissolved oxygen is lower, fluidized state is from streamed, and aerobic bacteria, hold concurrently positive bacterium and anerobe acting in conjunction, although reaction efficiency is lower, but can carry out anti-nitration reaction, can promote mud-water separation simultaneously.Treated sewage is discharged by the water outlet 18 at top, aerobic area, and top flange 10 can be used for connecting waste gas closed processes system, avoids producing secondary pollution.The centre of aerobic area is that air discharges district, and this region can discharge unnecessary air, and the foam producing when there is unforeseen circumstances is in addition focused on by tap water spray head 13.
Claims (17)
1. a bioreactor for sewage treatment, comprise that strong fluidization regions, weak fluidization regions, aerobic area and air discharge four, district part, it is characterized in that: high current district is positioned at reactor lower part, comprise strong fluidization regions cylindrical shell, gas distributor, guide shell and bio-carrier, gas distributor is arranged on the bottom of strong fluidization regions cylindrical shell, guide shell is positioned at directly over gas distributor, the center of gas distributor and the central shaft of guide shell are on an axis, and bio-carrier is positioned at the space that strong fluidization regions cylindrical shell surrounds; Weak current district is positioned at reactor middle part, comprises weak fluidization regions band hole column plate, bio-carrier and weak fluidization regions cylindrical shell, keeps a determining deviation between column plate, the space that a little less than bio-carrier is positioned at, fluidization regions cylindrical shell and column plate surround; Aerobic area and air discharge district and are concentric ring-shaped setting, and aerobic area discharges district around air to be arranged, be all positioned at reactor head, aerobic area comprises aerobic area cylindrical shell and aerobic area band hole column plate, and aerobic area cylindrical shell is identical with weak fluidization regions cylindrical shell internal-and external diameter; Air discharges district and comprises a cone cylinder with holes and an inner core, cone cylinder end diameter with holes is identical with inner diameter of steel flue, and be connected with inner core bottom, large end is connected with weak fluidization regions band hole column plate, cone cylinder with holes holds greatly external diameter to equate with weak fluidization regions cylinder internal diameter, and inner core passes with the circular hole that inner core external diameter equates from band hole column plate center, aerobic area.
2. reactor according to claim 1, it is characterized in that, described weak fluidization regions cylindrical shell comprises one section of cone cylinder and one section of straight tube, and cone cylinder small end is connected with top, strong fluidization regions by a band hole column plate equal with cone cylinder end diameter, and the large end of cone cylinder is connected with straight tube lower end.
3. reactor according to claim 1 and 2, it is characterized in that, on described band hole column plate, have a plurality of cylinder holes, arranging of cylinder hole be take column plate center as the center of circle, form a plurality of concentric(al) circless, cylinder hole inwall has 45～75 degree inclination angles, and vergence direction is consistent with the concentrically ringed tangential direction in place, vergence direction is all clockwise direction or is all counterclockwise, and percentage of open area is 5%～20%; The cross section of cylinder hole is circular or square, and the aperture in circular cylindrical shape hole is 10～20mm, and the cross section length of side in square column hole is 8～15mm; Band hole column plate thickness is 10～30mm, and tray spacing is from being 0.2～2m.
4. reactor according to claim 1 and 2, is characterized in that, on described cone cylinder with holes, has a plurality of holes, and hole is circular hole or square hole, and Circularhole diameter is 10～20mm, and the length of side of square hole is 8～15mm, and percentage of open area is 10%～20%.
5. reactor according to claim 1 and 2, is characterized in that, described inner core top and reactor top maintain an equal level, and inner diameter of steel flue is 30%～60% of aerobic area barrel diameter.
6. reactor according to claim 1 and 2, is characterized in that, described weak fluidization regions barrel diameter is 1.2～2 times of strong fluidization regions barrel diameter.
7. reactor according to claim 1 and 2, is characterized in that, the cumulative volume of the bio-carrier in described strong fluidization regions accounts for 10%～40% of strong fluidization regions cumulative volume, and in weak fluidization regions, bio-carrier volume accounts for 10%～30% of weak fluidization regions cumulative volume.
8. reactor according to claim 1 and 2, is characterized in that, described guide shell bottom has a plurality of cylinder holes, downward-sloping 45～75 degree angles of each cylinder hole inwall, and vergence direction is for to be tilted to outer wall by guide shell inwall, and percentage of open area is 5%～20%; Cylinder hole cross section is circular or square, and the aperture in circular cylindrical shape hole is 10～20mm, and the cross section length of side in square column hole is 8～15mm.
9. reactor according to claim 1 and 2, is characterized in that, described guide shell is one or more, the corresponding gas distributor of each guide shell, the center of gas distributor with corresponding guide shell central shaft on an axis.
10. reactor according to claim 1 and 2, is characterized in that, described air discharges inner core top, district the running water pipe of right-angled intersection is housed, and tap water spray head is evenly installed on running water pipe.
11. reactors according to claim 1 and 2, is characterized in that, described reactor head cylindrical shell outer rim is provided with flange.
12. reactors according to claim 3, is characterized in that, on described cone cylinder with holes, have a plurality of holes, and hole is circular hole or square hole, and Circularhole diameter is 10～20mm, and the length of side of square hole is 8～15mm, and percentage of open area is 10%～20%.
13. reactors according to claim 3, is characterized in that, described guide shell bottom has a plurality of cylinder holes, downward-sloping 45～75 degree angles of each cylinder hole inwall, and vergence direction is for to be tilted to outer wall by guide shell inwall, and percentage of open area is 5%～20%; Cylinder hole cross section is circular or square, and the aperture in circular cylindrical shape hole is 10～20mm, and the cross section length of side in square column hole is 8～15mm.
14. reactors according to claim 13, is characterized in that, described guide shell is one or more, the corresponding gas distributor of each guide shell, the center of gas distributor with corresponding guide shell central shaft on an axis.
15. reactors according to claim 14, is characterized in that, on described cone cylinder with holes, have a plurality of holes, and hole is circular hole or square hole, and Circularhole diameter is 10～20mm, and the length of side of square hole is 8～15mm, and percentage of open area is 10%～20%.
16. reactors according to claim 15, is characterized in that, described air discharges inner core top, district the running water pipe of right-angled intersection is housed, and tap water spray head is evenly installed on running water pipe.
17. reactors according to claim 1 and 2, is characterized in that, described inner core top and reactor top maintain an equal level, and inner diameter of steel flue is 30%～60% of aerobic area barrel diameter; Weak fluidization regions barrel diameter is 1.2～2 times of strong fluidization regions barrel diameter; The cumulative volume of the bio-carrier in strong fluidization regions accounts for 10%～40% of strong fluidization regions cumulative volume, and in weak fluidization regions, bio-carrier volume accounts for 10%～30% of weak fluidization regions cumulative volume.
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| CN201210344170.2A CN103663690B (en) | 2012-09-10 | 2012-09-10 | Sewage treatment bioreactor |
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| CN201210344170.2A CN103663690B (en) | 2012-09-10 | 2012-09-10 | Sewage treatment bioreactor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791027Y (en) * | 2005-04-28 | 2006-06-28 | 中国石油化工集团公司 | Three-phase biological fluidized bed reactor for sewage treatment |
| CN201010602Y (en) * | 2006-08-05 | 2008-01-23 | 刘端华 | Integrated processing device of industrial sewage fluid bed |
| CN201031174Y (en) * | 2007-05-21 | 2008-03-05 | 中国地质大学（武汉） | Intrinsic cycle three phase biological fluidized bed with precipitation hardening tipping plate |
| CN201250141Y (en) * | 2008-05-30 | 2009-06-03 | 许琦 | Internal circulation biological fluidized-bed reactor using microcapsule carrier |
| KR20090076658A (en) * | 2008-01-09 | 2009-07-13 | 대한민국(관리부서:국립수산과학원) | Fluidized filter tank of sea water recirculating aquaculture system |
-
2012
- 2012-09-10 CN CN201210344170.2A patent/CN103663690B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2791027Y (en) * | 2005-04-28 | 2006-06-28 | 中国石油化工集团公司 | Three-phase biological fluidized bed reactor for sewage treatment |
| CN201010602Y (en) * | 2006-08-05 | 2008-01-23 | 刘端华 | Integrated processing device of industrial sewage fluid bed |
| CN201031174Y (en) * | 2007-05-21 | 2008-03-05 | 中国地质大学（武汉） | Intrinsic cycle three phase biological fluidized bed with precipitation hardening tipping plate |
| KR20090076658A (en) * | 2008-01-09 | 2009-07-13 | 대한민국(관리부서:국립수산과학원) | Fluidized filter tank of sea water recirculating aquaculture system |
| CN201250141Y (en) * | 2008-05-30 | 2009-06-03 | 许琦 | Internal circulation biological fluidized-bed reactor using microcapsule carrier |
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