CN101050025A - Aeration bio filter in U shaped flow - Google Patents
Aeration bio filter in U shaped flow Download PDFInfo
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- CN101050025A CN101050025A CNA2007100211445A CN200710021144A CN101050025A CN 101050025 A CN101050025 A CN 101050025A CN A2007100211445 A CNA2007100211445 A CN A2007100211445A CN 200710021144 A CN200710021144 A CN 200710021144A CN 101050025 A CN101050025 A CN 101050025A
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- water
- back flushing
- 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
This invention discloses a U-shaped flow aeration biofilter, in which wastewater flows in U shape, and passes through an anaerobic section and an aerobic section for treatment. Of the U-shaped flow aeration biofilter, two kinds of filler are filled in one apparatus in parallel, and through connected via an opening/closing water hole. Outlet water refluxes to the water inlet through the refluxing apparatus. Since the entrapping degrees of suspended solids in the two filler sections are different, the back flush periods are different. Thus, two filler sections have separated water inlets, water outlets and back flush apparatuses. The filler sections can realize separate back flush by closing the water hole. Since the anaerobic and the aerobic treatments are performed alternately, the reactor has good treatment effect on wastewater with high ammonia nitrogen content. The removal rates of organic matters and ammonia nitrogen can reach 90% or higher. The reactor has such advantages as simple structure and low investment, and can be used to treat middle- and low-concentration wastewater.
Description
One, technical field
The invention belongs to a kind of waste disposal plant, particularly a kind of U-shaped stream BAF.
Two, background technology
BAF (BAF) is a kind of sewage treatment technique that rises the beginning of the nineties at the end of the eighties, and this technology only is used as tertiary treatment at first, after develop into gradually and be directly used in second-stage treatment.BAF uses the particulate filler of rough porous, and the filling surface growth has microbial film, aeration at the bottom of the pond, and during the effluent stream filter bed, pollutent at first is filtered and adsorbs, and then is decomposed by the microbiological oxidation of filling surface.Advantages such as its maximum characteristics are to integrate bio-oxidation and hold back suspended substance, have saved the post precipitation pond, and it is big to have a volumetric loading, and treatment effect is good, and hydraulic detention time is short, and initial cost is few.
But existing BAF technology still exists some shortcomings:
(1) the individual layer BAF requires very high to water inlet SS.For making it to handle higher organic loading and have the function of holding back SS in short hydraulic detention time, the packing material size that BAF adopts is generally all smaller.If the SS of water inlet is higher, can make the filter tank reach the head loss of design in a short period of time and stop up, so just will cause frequent back flushing, to biomembranous damage increase, influence the water outlet effect, increased working cost and management difficulty simultaneously.
(2) double-deck BAF technology has the nitration denitrification function, and denitrification effect is better, and one deck filtrate effectively catching SS, and the water inlet suspended substance is required to reduce.But existing double-deck BAF in height is superposed to two-layerly, and inevitable two-layer filtrate be held back SS degree difference, causes recoil cycle difference, makes troubles to operation.
Three, summary of the invention
Technical problem to be solved by this invention provides a kind of U-shaped stream BAF that can realize decarburization and nitrification function simultaneously, and it is mobile that it makes sewage be the U font in the body of pond, and successively by anoxic section and aerobic section, sewage is carried out purifying treatment.
U-shaped stream BAF of the present invention, it is characterized in that: it comprises housing, the water inlet distribution device, the floating stuffing layer, the sinking packing layer, supporting layer, the technology aerating apparatus, the back flushing distribution device, be provided with two element cells in the described housing side by side, two element cell tops are respectively equipped with water-in and water outlet, be provided with in the water-in side unit chamber by two floating stuffing floor that the water inlet distribution device clips up and down, the floating stuffing layer has the first back flushing distribution device, the first back flushing distribution device is communicated with the second back flushing distribution device of bottom, water outlet side unit chamber by the valve water hole that adds between two element cells, be provided with into water distribution device on the second back flushing distribution device successively, the technology aerating apparatus, supporting layer and sinking packing layer, be respectively equipped with the back flushing water-in on top, water-in side unit chamber and bottom, water outlet side unit chamber, be respectively equipped with the back flushing water outlet in bottom, water-in side unit chamber and top, water outlet side unit chamber.
The present invention is communicated with by water hole to be opened/closed between the filler by load two kinds of fillers side by side in an equipment.Because two sections fillers are held back suspended substance degree difference, cause recoil cycle difference, when reactor design, every layer of filler is provided with an intake-outlet and a cover recoiling device respectively, but isolated operation, when one section filler recoil, can close water hole, recoil does not influence the normal operation of another section filler separately, guarantees not influence simultaneously in recoil the operation of reactor.Because the scarce aerobic operation of reactor has treatment effect preferably to high ammonia nitrogen and the relatively poor sewage of biochemical.
The volume of two sections fillers of thickness of described filling can be for identical or different, the floating stuffing layer is the floating stuffing of particle diameter 6～8mm, be used to improve the water environment capacity in filter tank, prolong the periodic duty time and the acidication in filter tank, to a certain degree improve the biodegradability of sewage; The sinking filler of sinking packing layer filling particle diameter 3～5mm is used to increase the specific surface area of filler, thereby improves nitrifier biomass and the ammonia nitrogen removal frank that adheres to.Wherein the floating stuffing layer adopts the multiaspect hollow ball of no excess sludge or waste and old rigid plastics foam as filler, and sinking packing layer employing spherical biological haydite is as filler.
Can be connected at water outlet and be used for the effluent recycling device of part effluent recycling to water-in, make the part water outlet be back to the water inlet by reflux, on the one hand when the entering organic matter of water excessive concentration, can dilute water inlet by effluent recycling, reduce the organic loading of reactor, improve treatment effect; The part effluent recycling enters the anoxic section on the other hand, has denitrification function, can improve the denitrification effect of system, increases strong reactor denitrogenation ability.
When carrying out back flushing, adopt two sections fillers mode of recoil separately, determine backwashing period according to the head loss of every section filler.Its backwash process is: when A section filler needs back flushing, close bottom, filter tank water hole, sewage is entered by B unit bottom water-in, handles, and A recoils the unit, and combined water and air backwash is adopted in recoil, and gas flushing-air water is united flushing-water flushing; Equally, when B section filler needs back flushing, close bottom, filter tank water hole, sewage is flowed out by A unit bottom water outlet after the A section is handled, and the recoil process is with the A section.
The invention has the beneficial effects as follows that two-layer filler is placed side by side, every section filler does not disturb mutually independently recoiling in the element cell, and effluent quality reaches the stable time after the shortening back flushing; In addition, one section of one section anoxic of two sections fillers is aerobic, and the part effluent recycling improves sewage treating efficiency.Compared with prior art, the advantage that the present invention had is:
(1) in a U-shaped stream BAF, can realize decarburization and nitrification function simultaneously, and the denitrification effect that has, pollutants removal rate height, COD and ammonia nitrogen removal frank all can reach more than 90%, and the clearance of total nitrogen can reach more than 50%;
(2) energy consumption is low.Gas-water ratio is little, is 3: 1～5: 1 only, and working cost is low;
(3) cycle of operation long, it is easy to recoil, water consumption is low.First section filler effectively catching suspended substance guarantees follow-up normal operation, 4～6 all after dates of first section filler recoil, second section filler begins recoil, when every section filler recoils separately, do not influence the normal operation of another section filler and system, recoil is lower than 8% from the water consumption;
(4) recoil back system recovery time is short, can return to preceding more than 85% of efficient of removing of recoil in 1～2 hour.
Four, description of drawings
Fig. 1 is the structural representation of U-shaped stream BAF.
Five, embodiment
Figure 1 shows that the structural representation of U-shaped stream BAF, U-shaped stream BAF mainly is made up of water inlet distribution device 15, floating stuffing layer 14, sinking packing layer 13, supporting layer 12, technology aerating apparatus 11, back flushing distribution device 10,16, between two-layer filler, install and add valve water hole 3, when recoil, close water hole 3, do not influence the normal operation of the other side.During the reactor operation, sewage is flowed into by water-in 1, by water inlet distribution device 15 water distribution uniformities, through bottom floating stuffing layer 14, enters the B unit by water hole 3, passes supporting layer 12 and top sinking packing layer 13, removes suspended substance, COD, BOD
5Behind ammonia nitrogen, to discharge from water outlet 6, the part water outlet is back to water-in by effluent recycling device 7; Pressurized air enters by 5 simultaneously, by technology aerating apparatus 11 aerations, for microorganism growth provides oxygen; Pressurized air enters from gas inlet during backwash, and by back flushing distribution device 10,16 uniform distribution, clear water enters from backwash water-in 4 or 9, and the back flushing water outlet is flowed out by water outlet 2 or 8.With the recoil of A unit, left side is example, and its process is closed water-in 1 for closing water hole 3 earlier, and sewage is entered by water-in 4, and B unit, right side normally moves, and is 12～18L/ (m with intensity earlier
2S) gas carries out gas back flushing 2～4min, is 5～6L/ (m with water intensity again
2S) carry out combined water and air backwash 5～8min together with gas, the water rinse with same intensity totally puts into operation at last.General after the filter tank head loss reach a certain height, (be approximately about 1～2m) to unite with pressurized air and water outlet carry out back flushing.
Claims (3)
1, a kind of U-shaped stream BAF, it is characterized in that: it comprises housing, water inlet distribution device (15), floating stuffing layer (14), sinking packing layer (13), supporting layer (12), technology aerating apparatus (11), back flushing distribution device (10), be provided with two element cells in the described housing side by side, two element cell tops are respectively equipped with water-in (1) and water outlet (6), be provided with the floating stuffing floor (14) that clips by two water inlet distribution devices (15) up and down in the water-in side unit chamber, floating stuffing layer (14) has the first back flushing distribution device (10), the first back flushing distribution device (10) is communicated with the second back flushing distribution device (16) of bottom, water outlet side unit chamber by the valve water hole (3) that adds between two element cells, be provided with into water distribution device (15) on the second back flushing distribution device (16) successively, technology aerating apparatus (11), supporting layer (12) and sinking packing layer (13), be respectively equipped with back flushing water-in (4 on top, water-in side unit chamber and bottom, water outlet side unit chamber, 9), be respectively equipped with back flushing water outlet (2 in bottom, water-in side unit chamber and top, water outlet side unit chamber, 8).
2, according to the described U-shaped stream of claim 1 BAF, it is characterized in that: the particle diameter of filler is 6～8mm in the floating stuffing layer (14); The particle diameter of sinking packing layer (13) filler is 3～5mm.
3, according to claim 1 or 2 described U-shaped stream BAF, it is characterized in that: water outlet (7) is connected to and is used for the effluent recycling device (7) of part effluent recycling to water-in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211445A CN100465107C (en) | 2007-03-30 | 2007-03-30 | Aeration bio filter in U shaped flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100211445A CN100465107C (en) | 2007-03-30 | 2007-03-30 | Aeration bio filter in U shaped flow |
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| CN101050025A true CN101050025A (en) | 2007-10-10 |
| CN100465107C CN100465107C (en) | 2009-03-04 |
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| CNB2007100211445A Expired - Fee Related CN100465107C (en) | 2007-03-30 | 2007-03-30 | Aeration bio filter in U shaped flow |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351304A (en) * | 2011-09-09 | 2012-02-15 | 北京林业大学 | Novel biological aerated filter capable of solving backwashing problem |
| CN103351054A (en) * | 2013-07-01 | 2013-10-16 | 嘉兴学院 | BAF reactor used for treating electroplating wastewater |
| CN103833131A (en) * | 2014-03-12 | 2014-06-04 | 清华大学深圳研究生院 | Deep sewage denitrification treatment equipment and deep sewage denitrification treatment method |
| CN104445821A (en) * | 2014-12-03 | 2015-03-25 | 上海理工大学 | Process combination system for integrated treatment of micro-polluted raw water and method of process combination system |
| CN104512960A (en) * | 2013-09-26 | 2015-04-15 | 中国石油化工股份有限公司 | Wastewater biological treatment integrated device and wastewater processing method |
| CN105036332A (en) * | 2015-07-10 | 2015-11-11 | 南京大学 | Alternating internal-recycle biological filter sewage treatment device and method using same |
| CN106082428A (en) * | 2016-08-18 | 2016-11-09 | 环境保护部南京环境科学研究所 | A kind of with the alkali leaching excess sludge BAF system as filler and operation method thereof with filler preparation method |
| CN108178340A (en) * | 2017-12-29 | 2018-06-19 | 四川安达尔环保工程有限公司 | A kind of biological fixation enzymatic biochemical reactor |
| CN109250818A (en) * | 2018-11-14 | 2019-01-22 | 重庆大学 | Vertical deflector type solid carbon source denitrification filter pool |
| CN109354213A (en) * | 2018-10-31 | 2019-02-19 | 浙江省农业科学院 | The biofilter water distribution system of water distribution uniformity |
| CN115448456A (en) * | 2021-01-28 | 2022-12-09 | 苏州科技大学 | Biological sewage denitrification treatment method and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2565427B2 (en) * | 1991-04-24 | 1996-12-18 | 株式会社荏原製作所 | Organic sewage biological filtration equipment |
| JP2003260478A (en) * | 2002-03-11 | 2003-09-16 | Fuji Clean Kogyo Kk | Septic tank and usage thereof |
| CN2611359Y (en) * | 2003-02-17 | 2004-04-14 | 魏志文 | Combined two-way stream aerating biological filter chamber unit |
| JP2004305928A (en) * | 2003-04-08 | 2004-11-04 | Shunji Nishi | Carrier flow biological filtering waste water treating device |
| CN2632073Y (en) * | 2003-06-27 | 2004-08-11 | 北京永新双益环保设备有限公司 | Duoble-bed ceramic particle biological filtering pool |
| CN100513327C (en) * | 2006-06-09 | 2009-07-15 | 华南理工大学 | Laminated aerator biological filter pool and its method for pretreat light-pollution primary water |
-
2007
- 2007-03-30 CN CNB2007100211445A patent/CN100465107C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351304A (en) * | 2011-09-09 | 2012-02-15 | 北京林业大学 | Novel biological aerated filter capable of solving backwashing problem |
| CN103351054A (en) * | 2013-07-01 | 2013-10-16 | 嘉兴学院 | BAF reactor used for treating electroplating wastewater |
| CN104512960A (en) * | 2013-09-26 | 2015-04-15 | 中国石油化工股份有限公司 | Wastewater biological treatment integrated device and wastewater processing method |
| CN104512960B (en) * | 2013-09-26 | 2016-03-23 | 中国石油化工股份有限公司 | A kind of integrated apparatus of biological wastewater treatment and method of wastewater treatment |
| CN103833131B (en) * | 2014-03-12 | 2017-02-15 | 清华大学深圳研究生院 | Deep sewage denitrification treatment equipment and deep sewage denitrification treatment method |
| CN103833131A (en) * | 2014-03-12 | 2014-06-04 | 清华大学深圳研究生院 | Deep sewage denitrification treatment equipment and deep sewage denitrification treatment method |
| CN104445821A (en) * | 2014-12-03 | 2015-03-25 | 上海理工大学 | Process combination system for integrated treatment of micro-polluted raw water and method of process combination system |
| CN104445821B (en) * | 2014-12-03 | 2016-09-14 | 上海理工大学 | The process combination system and method for close-coupled processing micro-polluted raw |
| CN105036332A (en) * | 2015-07-10 | 2015-11-11 | 南京大学 | Alternating internal-recycle biological filter sewage treatment device and method using same |
| CN106082428A (en) * | 2016-08-18 | 2016-11-09 | 环境保护部南京环境科学研究所 | A kind of with the alkali leaching excess sludge BAF system as filler and operation method thereof with filler preparation method |
| CN108178340A (en) * | 2017-12-29 | 2018-06-19 | 四川安达尔环保工程有限公司 | A kind of biological fixation enzymatic biochemical reactor |
| CN109354213A (en) * | 2018-10-31 | 2019-02-19 | 浙江省农业科学院 | The biofilter water distribution system of water distribution uniformity |
| CN109250818A (en) * | 2018-11-14 | 2019-01-22 | 重庆大学 | Vertical deflector type solid carbon source denitrification filter pool |
| CN115448456A (en) * | 2021-01-28 | 2022-12-09 | 苏州科技大学 | Biological sewage denitrification treatment method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN100465107C (en) | 2009-03-04 |
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Granted publication date: 20090304 Termination date: 20120330 |