CN104876331B - A kind of biological suspension bed advanced waste treatment method - Google Patents
A kind of biological suspension bed advanced waste treatment method Download PDFInfo
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- CN104876331B CN104876331B CN201510319987.8A CN201510319987A CN104876331B CN 104876331 B CN104876331 B CN 104876331B CN 201510319987 A CN201510319987 A CN 201510319987A CN 104876331 B CN104876331 B CN 104876331B
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- preoxygenation
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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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Abstract
A kind of biological suspension bed advanced waste treatment method, comprises the following steps：（1）Waste water after pretreatment is carried out preoxygenation；（2）Waste water after preoxygenation is delivered to biological suspension bed reactor and carries out deep biochemical reaction, reacted supernatant overflow is discharged；（3）Supernatant is flowed back, individually to backflow supernatant preoxygenation or the supernatant preoxygenation together with raw water that will flow back；（4）Discharge remaining mud, to control height and the microorganism total amount of biological suspension bed reactor superposed layer.The present invention adopts the waste water after the process of biologic treating technique advanced treating routine biochemistry, the pollutant of the remnants that degrade further, widen biologic treating technique application in the treatment of waste water, floor space is little, improve the stability of operational management condition and water quality, investment and operating cost are low, operational management is convenient, does not produce secondary pollution, is capable of the clean-up effect of lifting waste water.
Description
Technical field
The present invention relates to a kind of method that Sewage advanced treatment is carried out by biological suspension bed, belong to wastewater processing technology neck
Domain.
Background technology
Most municipal sewages and part industrial wastewater, (as A/O, A2/O, SBR, are connect using traditional biologic treating technique
Touch oxidation etc.) it is generally capable of up to the requirement of discharge standard, even if part index number is not up to standard, as long as increase coagulation behind sinking
The conventional advanced treating measures such as shallow lake, filtration, also can reach preferable effect.But in recent years, with Pollutants in Wastewater composition
Change, and the raising to environmental requirement for the people, traditional handling process can not meet increasingly strict discharge standard will
Ask, for this on the basis of strengthening secondary biochemical treatment, many further treatment technique are (as advanced oxidation, activated carbon adsorption, film divide
From etc.) be widely used.These technology are effectively improved the removal effect of Pollutants in Wastewater, but exist and be processed into
The problems such as this height, operational management complexity, secondary pollution can not be ignored, is badly in need of a kind of low cost, effect is significant, eco-friendly skill
Art.
, after biological treatment (particularly long aerobic treatment), organic pollution concentration therein is significantly for waste water
Cut down, the main component of remaining COD be microbial degradation the Organic substance of residuum thing SMP, humic acid and part synthetic and
Its metabolite etc., these pollutant biodegradabilities are poor, and part metabolite has certain toxicity to microorganism, if carried out again
Conventional biochemical treatment, is difficult to cut down further.But work as and continuously add, to traditional biochemical treatment system, the spy filtering out
Plant microorganism or enzyme preparation, or by the standing long period placed in the vessel for the waste water after biochemical treatment, also or this waste water
After being discharged in the natural environment such as natural water (as wetland, viscous flow pool etc.), its water quality condition all can make moderate progress, and this explanation is no
By being in natural environment or to pass through artificial screening, certain micro-organisms is truly had to have the ability of this kind of amounts of residual contamination of degrading.Only
It is because routine biochemistry treatment facility is difficult to create a control environment that can be enriched with this enough quasi-microorganism.
In conventional biochemical treatment system, Organic Pollutants in Wastewater concentration is high, good biodegradability, is conducive to routine
The growth of microorganism and breeding, and this kind of microbial degradation speed of metabolism difficult for biological degradation pollutant is slow, its metabolism is subject to other
The restriction of microorganism, is hardly formed dominant microflora in activated sludge or biomembrane, therefore can not show it well peculiar
Degradation.
Sewage, after biochemical treatment, remains in the organic concentration in water and reduces (COD is tens of mg/L), biodegradability
It is deteriorated, now, this quasi-microorganism can show stronger survival advantage.But when using traditional aerobic treatment PROCESS FOR TREATMENT
During this waste water, in order that the pollutant in waste water and microorganism are sufficiently mixed it is necessary to provide necessary mixing intensity, but excessively
Mixing can lead to that dissolved oxygen concentration is too high, shearing force is excessive, it is loose in turn result in microorganism flco, easily runs off with water outlet；
And low intensive stirring or aeration cannot meet the requirement of microorganism and the abundant mass transfer of Pollutants in Wastewater, therefore cannot be anti-
Answer the amount improving this quasi-microorganism in device, thus leading to removal effect not good.Using microorganisms such as catalytic oxidation, charcoal, MBR
Although the loss of microorganism can be controlled during beneficiation technologies, improve treatment effect, but in the case that pollutant levels are relatively low,
The aeration of high intensity and backwash still affect the metabolism of this quasi-microorganism, all can produce harmful effect to its quality and quantity,
Thus impact waste water treatment effeciency, in engineering application still suffer from treatment effeciency low, investment and operating cost high the problems such as.
Content of the invention
It is an object of the invention to overcoming the shortcomings of that existing wastewater processing technology exists, one kind is provided can efficiently to cut down low
The biological suspension bed advanced waste treatment method of the pollutant such as difficult degradation COD, the method environmental friendliness, operating cost under concentration
Low, stable effluent quality, operational management convenience.
The biological suspension bed advanced waste treatment method of the present invention, comprises the following steps：
(1) carry out preoxygenation by the waste water after biochemical treatment or through biochemical and after materializing strategy waste water；
(2) waste water after preoxygenation is delivered to biological suspension bed reactor and carries out deep biochemical reaction, reacted on
Clear liquid overflow is discharged；
(3) in order to improve preliminary filling oxygen efficiency, supernatant is flowed back, individually to backflow supernatant preoxygenation or the supernatant that will flow back
Liquid preoxygenation together with raw water；
(4) discharge remaining mud, to control height and the microorganism total amount of biological suspension bed reactor superposed layer.
In described step (1), preoxygenation is to adopt normal pressure aeration or high pressure solution gas according to the COD concentration intended in degrading waste water
Mode carry out, specifically when intend remove COD be not higher than 15mg/L when, using the preoxygenation mode of normal pressure aeration, when COD is dense
When degree is higher than 15mg/L, using the oxygenation mode of high pressure solution gas；Described normal pressure aeration is that waste water is introduced Aeration tank aeration, stops
Time is not less than 10 minutes；Described high pressure solution gas be waste water is pressurizeed after (adopt high-pressure pump) with compressed air (by air compressor machine pressure
Enter) in dissolving, mixed dissolution becomes high pressure dissolved air water.
Biological suspension bed reactor in described step (2) is up-flow aerobe reactor, and waste water is in reactor
The time of staying determines according to the COD concentration intending removing, and controls the mixed liquor upflow velocity in reactor to be 1.0-3.0m/h
(m/h).For meeting the requirement of retention time of sewage and mixed liquor upflow velocity simultaneously, can by the return of waste water after processing extremely
In reactor.
Described up-flow aerobe reactor mainly includes the downflow weir at bottom water distribution system and top, if necessary (such as
When using high pressure dissolving air method preoxygenation), in the reactor three phase separator should be set on top.Water distribution system therein can be adopted
(when using high pressure dissolved oxygen mode preoxygenation, using continuum micromeehanics mode, work as employing with the mode of continuum micromeehanics or pulse water-feeding
Normal pressure aeration mode preoxygenation, and when mixed liquor upflow velocity is relatively low, pulse water-feeding mode can be adopted), water is uniformly distributed
To reactor bottom；Downflow weir therein should uniformly be laid, and overflow load is not more than 6m3/ mh (rice3/ meters per hour).
In described step (3), when individually to backflow supernatant preoxygenation, reflux ratio R (%)=100* [inlet COD concentration
(mg/L)-effluent COD concentration (mg/L)]/[15* preoxygenation pressure (atmospheric pressure)]；Backflow supernatant preoxygenation together with raw water
When, reflux ratio R (%)=100* [inlet COD concentration (mg/L)-effluent COD concentration (mg/L)]/[15* preoxygenation pressure (air
Pressure)] -100.
It is surplus with the mud discharging mouth discharge of bottom in the middle part of biological suspension bed reactor by being arranged in described step (4)
Remaining mud, control suspension layer height is 1.5m-2.5m.
The operation principle of said method is as follows：
(1) in addition to the microorganism of easily biological-degradable Organic substance in degrading waste water, nature there is also many extraordinary micro-
Biology, the organic pollution of some difficult degradations of metabolism is capable of in these microorganisms, and this quasi-microorganism is processed micro- life with routine biochemistry
Thing conjunctive use, can effectively lift the clearance to pollutant such as COD in waste water for the facility, deep purification of wastewater water quality；
(2) waste water with biochemical treatment or after biochemistry+materializing strategy, as raw water, can limit the life of conventional microbiological
Long, be conducive to the extraordinary microorganism formation dominant microflora of difficult biochemistry COD of degrading；
(3) metastable fluid environment is conducive to enrichment and the metabolism of extraordinary microorganism, is easily formed metastable
Microecological environment；
(4) by the way of preoxygenation and reasonable water distribution, properly settled under the conditions of low stain thing mixed liquor mass transfer and filled
The contradiction of oxygen；
(5) pass through to adjust the relation of the preliminary filling carrier of oxygen discharging in upflow velocity and water and biological metabolism gas flow, can
Control system forms suitable shearing force, promotes mud more closely knit, suspended sludge layer is more stable, can be in effectively catching water
Remaining SS.
The invention has the characteristics that：
(1) adopt the waste water after the process of biologic treating technique advanced treating routine biochemistry, the pollution of the remnants that degrade further
Thing, has widened biologic treating technique application in the treatment of waste water；
(2) waste water quality after advanced treating is suitable with using the waste water quality after current wetland advanced treating, and takes up an area
Area substantially reduces, the stability of operational management condition and water quality is greatly improved；
(3) there is compared with other wastewater deep treatment process investment and operating cost is low, operational management facilitates, do not produce
The advantages such as secondary pollution；
(4) with other physico-chemical process wastewater deep treatment process (as coagulating sedimentation, chemical oxidation, advanced oxidation, absorption etc.)
Combination, is capable of the clean-up effect of lifting waste water.
Brief description
Fig. 1 is the schematic flow sheet that the present invention adopts normal pressure aeration preoxygenation method.
Fig. 2 is the schematic flow sheet that the present invention individually adopts high pressure solution gas preoxygenation method to backflow supernatant.
Fig. 3 is the schematic flow sheet that the present invention adopts high pressure solution gas preoxygenation method together with backflow supernatant to waste water
In figure：1st, Aeration tank, 2, elevator pump, 3, pulse water distributing device, 4, water distributor, 5, microbial suspension bed, 6, downflow weir,
7th, mud discharging mouth, 8, high-pressure pump, 9, air compressor machine, 10, dissolving, 11, three phase separator, 12, exhaustor.
Specific embodiment
Embodiment 1
The biological suspension bed advanced waste treatment method of the present embodiment, as shown in figure 1, details are provided below.
(1) carry out preoxygenation by the waste water after biochemical treatment or through biochemical and after materializing strategy waste water
The COD intending removing is not higher than 15mg/L, carries out preoxygenation to the waste water after processing in the way of normal pressure aeration.Specifically
It is by the waste water after biochemical treatment or to carry out normal pressure aeration through biochemical and after materializing strategy waste water introducing Aeration tank 1, stop
Time is not less than 10 minutes.
(2) waste water after preoxygenation is delivered to biological suspension bed reactor and carries out deep biochemical reaction
Using biological suspension bed reactor be up-flow aerobe reactor, mainly include from bottom to top water distributor 4,
Microbial suspension bed 5 and downflow weir 6, water distributor 4 is connected with pulse water distributing device 3, using pulse water-feeding, waste water is evenly distributed to
Reactor bottom.Downflow weir 6 is uniformly laid, and overflow load is not more than 6m3/mh.At reactor bottom and middle part, (microorganism is hanged
Floating bed 5 bottom) it is provided with two mud discharging mouths 7.
Preoxygenation waste water is promoted to pulse water distributing device 3 by Aeration tank 1 by elevator pump 2, then enters reaction by water distributor 4
Device, waste water determined according to the COD concentration intending removing in the time of staying of reactor, and controlled the mixed liquor upper up-flow in reactor
Speed is 1.0-3.0m/h.
Reacted supernatant passes through downflow weir 6 overflow and discharges.Rise for meeting retention time of sewage and mixed liquor simultaneously
The requirement of flow velocity, can be by the return of waste water after processing to reactor.
(3) height controlling biological suspension bed reactor superposed layer is 1.5m-2.5m, and controls microorganism total amount, passes through
Two mud discharging mouths 7 of the middle part of biological suspension bed reactor and bottom discharge remaining mud.The excess sludge being discharged
Close structure, sludge concentration are high, sludge settling speed is fast.
By the above, the waste water after process in Aeration tank 1 after 10 minutes aerations water outlet dissolved oxygen concentration reach
8.5mg/L；The time of staying in reactor for the waste water is 2.5 hours, controls the mixed liquor upflow velocity in reactor to be 2.0m/
H, downflow weir 6 overflow load 3.0m3/ mh, reacted supernatant overflow is discharged；Then the present embodiment Inlet and outlet water detection data sees below
Table.
Water detection data after embodiment 1 before processing
Embodiment 2
The present embodiment and being a difference in that of embodiment 1 carry out indirect preoxygenation using high pressure dissolving air method to waste water, that is,
Supernatant is flowed back, after pressurized molten gas, then is concomitantly introduced into biological suspension bed reactor with waste water, as shown in Fig. 2 detailed process
As described below.
(1) carry out indirect preoxygenation by the waste water through biochemical treatment or through biochemical and after materializing strategy waste water
The COD intending removing is higher than 15mg/L, and the oxygenation mode using high pressure solution gas carries out preoxygenation, the process that will flow back
The compressed air that water (supernatant that downflow weir 6 overflow is discharged) is pressed into air compressor machine 9 after high-pressure pump 8 pressurizes is in dissolving 10
Interior mixed dissolution becomes high pressure dissolved air water.
(2) the backflow dissolved air water after preoxygenation is delivered to biological suspension bed reactor together with waste water and carries out deep biochemical
Reaction
Top setting three phase separator 11 reactor in the reactor, using continuum micromeehanics mode.By returning after preoxygenation
Waste water is evenly distributed to reaction with the waste water after biochemical treatment by the water distributor 4 of biological suspension bed reactor bottom by flowing water
Device bottom, waste water carries out deep biochemical reaction by microbial suspension bed 5 from bottom to top, the reacted device top of reacted waste water
After the three phase separator 11 of setting carries out solid, liquid, gas three phase separation, discharged by downflow weir 6 overflow, a waste water part for discharge reaches
Mark discharge, a part is back to high-pressure pump 8 water inlet of leading portion, and the gas isolated discharges through exhaustor 12.Waste water is in reaction
The time of staying in device is 2.5h, controls the mixed liquor upflow velocity in reactor to be 2.5m/h, downflow weir 6 overflow load is little
In 4.0m3/mh.
(3) according to technological requirement, the present embodiment is individually to backflow supernatant preoxygenation, and concrete reflux ratio is R=100*
(70-54)/(15*3)=35%, dissolving 3 pressure is 3.0 atmospheric pressure, and water outlet dissolved oxygen concentration reaches 30mg/L.
The Inlet and outlet water detection data of the present embodiment see table.
Water detection data after embodiment 2 before processing
Embodiment 3
Supernatant is flowed back by the present embodiment with being a difference in that of embodiment 2, after pressurized molten gas together with waste water, then draws
Enter biological suspension bed reactor, as shown in figure 3, details are provided below.
(1) carry out preoxygenation by the waste water through biochemical treatment or through biochemical and after materializing strategy waste water
Intend remove COD be higher than 15mg/L, using high pressure solution gas oxygenation mode to the waste water after biochemical treatment and backflow
Process water (downflow weir 6 overflow discharge supernatant) carry out preoxygenation, will place through the waste water after biochemical treatment and backflow
The compressed air that reason water is pressed into air compressor machine 9 together after high-pressure pump 8 pressurization mixed dissolution in dissolving 10 becomes high pressure solution
Air water.
(2) waste water after preoxygenation is delivered to biological suspension bed reactor and carries out deep biochemical reaction
By after preoxygenation waste water by the water distributor 4 of biological suspension bed reactor bottom, waste water is evenly distributed to instead
Answer device bottom, waste water carries out deep biochemical reaction by microbial suspension bed 5 from bottom to top, on the reacted device of reacted waste water
After the three phase separator 11 of portion's setting carries out solid, liquid, gas three phase separation, discharged by downflow weir 6 overflow, a waste water part for discharge
Qualified discharge, a part is back to high-pressure pump 8 water inlet of leading portion, and the gas isolated discharges through exhaustor 12.Waste water is anti-
Answer the time of staying in device to be 2.5h, control the mixed liquor upflow velocity in reactor to be 2.2m/h, downflow weir 7 overflow load is not
More than 4.5m3/mh.
(3) according to technological requirement, the present embodiment will flow back supernatant preoxygenation together with raw water, and concrete reflux ratio is R=
100* (80-45)/(15*2) -100=16%, dissolving 3 pressure is 2 atmospheric pressure, and water outlet dissolved oxygen concentration reaches 20mg/L.
The Inlet and outlet water detection data of the present embodiment see table.
Water detection data after embodiment 3 before processing
Claims (1)
1. a kind of biological suspension bed advanced waste treatment method, comprises the following steps：
（1）Carry out preoxygenation by the waste water after biochemical treatment or through biochemical and after materializing strategy waste water；
（2）Waste water after preoxygenation is delivered to biological suspension bed reactor and carries out deep biochemical reaction, reacted supernatant
Overflow is discharged；
（3）In order to improve preliminary filling oxygen efficiency, supernatant is flowed back, individually to backflow supernatant preoxygenation or will flow back supernatant and
Raw water preoxygenation together；
（4）Discharge remaining mud, to control height and the microorganism total amount of biological suspension bed reactor superposed layer；
It is characterized in that：
Described step（1）In, preoxygenation is to adopt the side of normal pressure aeration or high pressure solution gas according to the COD concentration intended in degrading waste water
Formula is carried out, specifically when the COD intending removing is not higher than 15mg/L, using the preoxygenation mode of normal pressure aeration, when COD concentration is high
When 15mg/L, using the oxygenation mode of high pressure solution gas；Described normal pressure aeration is that waste water is introduced Aeration tank aeration, the time of staying
Not less than 10 minutes；Described high pressure solution gas be using high-pressure pump, water body is pressurizeed after with air compressor machine press-in compressed air in molten gas
In-tank mixing is dissolved into high pressure dissolved air water；
Described step（2）Middle waste water determined according to the COD concentration intending removing in the time of staying of reactor, and controlled in reactor
Mixed liquor upflow velocity be 1.0-3.0m/h；
Described step（3）In, when individually to backflow supernatant preoxygenation, ［ the inlet COD concentration mg/L- water outlet of reflux ratio R%=100*
COD concentration mg/L ］/［ 15* preoxygenation pressure ］；Backflow supernatant together with raw water during preoxygenation, ［ intake by reflux ratio R%=100*
COD concentration mg/L- effluent COD concentration mg/L ］/［ 15* preoxygenation pressure ］ -100；
Described step（4）In, it is remaining with the mud discharging mouth discharge of bottom in the middle part of biological suspension bed reactor by being arranged on
Mud, control suspension layer height be 1.5m-2.5m.
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| CN1023997C (en) * | 1991-07-11 | 1994-03-16 | 中国纺织大学 | Deep treatment of waste water from printing and dyeing mill and related apparatus |
| JPH08215694A (en) * | 1995-02-10 | 1996-08-27 | Denka Consult & Eng Co Ltd | Highly functional biological treatment apparatus |
| CN101585643A (en) * | 2008-05-20 | 2009-11-25 | 海斯博特（北京）科技有限公司 | High-efficiency pre-aeration aerobic biochemical sewage treatment system |
| CN201686541U (en) * | 2010-03-03 | 2010-12-29 | 张安龙 | Internal recycle aerobic biological reactor |
| CN202415249U (en) * | 2011-12-31 | 2012-09-05 | 林映津 | Sludge reduction efficient biochemical treatment device |
| CN203033860U (en) * | 2012-12-22 | 2013-07-03 | 河北联合大学 | Micro-aerobic expansion particle sludge bed- steel slag biological aerated filter sewage treatment system |
| CN203033828U (en) * | 2012-12-22 | 2013-07-03 | 河北联合大学 | Micro-aerobic expansion particle sludge bed wastewater treatment device |
| CN103601294B (en) * | 2013-11-01 | 2015-01-21 | 东北师范大学 | Method and system for realization of autotrophic nitrogen removal of micro polluted water |
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Effective date of registration: 20180823 Address after: 250013 Lishan Road, Lixia District, Ji'nan, Shandong, 50 Patentee after: Shandong Environmental Protection Scientific Research Design Institute Co., Ltd. Address before: 250013 Lishan Road, Lixia District, Ji'nan, Shandong, 50 Patentee before: Shandong Academy of Environmental Science |