CN105253997A - Pressure type microbubble biochemical reaction technology - Google Patents
Pressure type microbubble biochemical reaction technology Download PDFInfo
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- CN105253997A CN105253997A CN201510758040.7A CN201510758040A CN105253997A CN 105253997 A CN105253997 A CN 105253997A CN 201510758040 A CN201510758040 A CN 201510758040A CN 105253997 A CN105253997 A CN 105253997A
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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
The invention relates to the field of sewage treatment, in particular to a pressure type microbubble biochemical reaction technology. The technology includes the following steps that S1, sewage and air are fully mixed in a microbubble generator to form an air and water mixture; S2, the air and water mixture enters a pressure type biochemical reactor to be subjected to a microorganism aerobic metabolic reaction; S3, the mixture generated after the biochemical reaction enters a gas-liquid-solid three-phase separator for gas-liquid-solid three-phase separation. Under the efficient mixing and dispersing function of the microbubble generator, air is evenly dispersed in sewage, the oxygen utilization rate of the reactor is increased, the amount of air required in the reaction is reduced, the gas digestion amount is reduced, and the amount of waste gas is reduced; water flows out of the biochemical reactor, a small number of mirobubbles exist in the water, and a certain pressure exists so that once decompression is carried out, biological sludge adsorbed by the microbubbles can quickly float on the liquid surface, and the aim of quickly separating sludge and water is achieved.
Description
Technical field
The present invention relates to sewage treatment area, in particular to a kind of pressure type microbubble biochemical reaction technique.
Background technology
Along with the development of society, the quantity discharged of industrial sewage, municipal effluent increases day by day, and the requirement of people to environmental quality improves constantly, and water technology development is maked rapid progress.Petroleum chemical industry is along with the continuous increase of domestic processed oil demand, increasing oil refining enterprise production equipment starts to process Middle East crude oil with poor quality more, carry out crude oil deep processing simultaneously, the exploitation of high-sulfur, high-acid crude oil and processing ratio are in cumulative year after year, oil in water emulsion in the sewage that the oil product course of processing is produced, Persistent organic pollutants, sulfide, ammonia nitrogen and inorganic salt isoconcentration constantly increase, and the sewage quality that oil refining enterprise produces goes from bad to worse.Aerobic treatment technology is the mainstream technology of biochemical treatment, and the oxygen needed for Aerobic biological process system is supplied by aeration.Conventional aerobic biochemical technique is low to hardly degraded organic substance degradation efficiency.The sludge bulking of aerobic biochemical ubiquity, Mud up-floating, bubble-related issues etc. make water quality treatment be deteriorated, and system works is destroyed.The second pond mud-water separation time of biochemical system is long, and especially when sludge bulking, separating effect is difficult to ensure.
Existing aerobic biochemical technology generally runs at normal temperatures and pressures, the saturation solubility of oxygen in water is very little, transmission between gas-liquid becomes the restraining factors of conventional aerobe reaction, according to statistics, the energy consumption of aerobe method process waste water has 50 ~ 70% for the power consumption of aeration, thus cause that oxygen replenishing equipment is bulky, investment, running cost is high, and reaction efficiency is low, and floor space is large.This constrains conventional aerobe normal direction economy to a certain extent, efficiently, takes up an area little development.
Summary of the invention
The object of the present invention is to provide a kind of pressure type microbubble biochemical reaction technique, to solve the above problems.
Provide a kind of pressure type microbubble biochemical reaction technique in an embodiment of the present invention, comprise the following steps:
S1: fully mixed in microbubble generator with air by sewage, forms air-water mixture;
S2: air-water mixture carries out microorganism well foster metabolic reaction to enter in pressure type biochemical reactor;
S3: the mixture after biochemical reaction enters in gas-liquid-solid three-phase separator, carries out gas-liquid-solid three-phase separation.
Further, described microbubble generator be Venturi type pipe microbubble generator, shear contact bubble generator and micropore cutting foam maker.
Further, the bubble diameter cut in described microbubble generator is less than 0.5mm.
Further, the operational condition of described pressure type biochemical reactor is: temperature of reaction 15 DEG C-40 DEG C, and reflux ratio 0.5-2, biochemical pressure is less than 100KPa.
Further, the reaction time of described pressure type biochemical reactor is 3 hours-6 hours.
Further, described pressure type biochemical reactor fully-closed runs.
Further, the gas-water ratio in described pressure type biochemical reactor is 6.
Further, it is 10min-60min that the mixture after biochemical reaction enters the disengaging time after in gas-liquid-solid three-phase separator.
Further, the solid microbe sludge reflux after gas-liquid-solid three-phase separation recycles to pressure type biochemical reactor.
Further, air compresses before entering microbubble generator.
Pressure type microbubble biochemical reaction technique provided by the invention, under the high efficient mixed dissemination of microbubble generator, gas uniform is dispersed in sewage, eliminate routine biochemistry and react the gas-liquid mass transfer process of carrying out in the reactor, improve reactor coefficient of oxygen utilization, decrease reaction required air quantity, and then make reactor gas-water ratio be reduced to about 5, saving gas digestion amount, reduces exhausted air quantity; Biochemical reactor water outlet, owing to still containing a small amount of microbubble, and has certain pressure, so once decompression, the biological sludge that microbubble adsorbs just can float up to liquid level rapidly, thus reaches the object of muddy water sharp separation.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the biochemical schematic flow sheet of pressure type of pressure type microbubble biochemical reaction technique of the present invention.
Reference numeral:
1: sewage 2: air 3: waste gas
4: water purification 5: mud 6: intake pump
7: microbubble generator 8: pressure type biochemical reactor 9: gas-liquid-solid three-phase separator
10: recycle pump
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, carry out clear, complete description by technical scheme of the present invention below.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, particular case above-mentioned term concrete meaning in the present invention can be understood.
As shown in drawings, the invention provides a kind of pressure type microbubble biochemical reaction technique, comprise the following steps:
S1: fully mixed in microbubble generator 7 with air 2 by sewage 1, forms air-water mixture;
S2: air-water mixture carries out microorganism well foster metabolic reaction to enter in pressure type biochemical reactor 8;
S3: the mixture after biochemical reaction enters in gas-liquid-solid three-phase separator 9, carries out gas-liquid-solid three-phase separation.
The present invention be directed to existing biochemical technology reaction efficiency low, hardly degraded organic substance difficulty is removed, and the abnormal conditions such as sludge bulking, Mud up-floating, bubble-related issues are given prominence to.The heavy pond mud-water separation time is long, and especially when sludge bulking, separating effect is difficult to the problems such as guarantee, proposes a kind of new biochemical sewage strengthening treatment process method.
Principle of the present invention is: entered in microbubble generator 7 by air 2, and make more air 2, especially oxygen dissolution is in sewage 1, improves gas-liquid mass transfer efficiency, improves the oxygen utilization rate of reactor, and then improves biochemical reaction efficiency.
Detailed process is: first arranged by air 2 in microbubble generator 7, sewage 1 is entered into microbubble generator 7 by intake pump 6, mix fully in microbubble generator 7 with air 2, especially oxygen is more dissolved in sewage 1, form air-water mixture; After being discharged from microbubble generator 7 by the air-water mixture dissolved, enter into pressure type biochemical reactor 8, in pressure type biochemical reactor 8, carry out microorganism support metabolic reaction well; Mixture after supporting metabolism is well discharged in pressurized reactor, enter into gas-liquid-solid three-phase separator 9, carry out gas-liquid-solid three-phase separation, the waste gas 3 of biochemical reaction generation is gone out from gas-liquid-solid three-phase separator 9 top discharge, what side direction top was discharged is water purification 4, the solid microbe mud 5 generated in biochemical reaction process is discharged in bottom, effluent sewerage 1 treatment system.
Gather in whole process, biochemical reactor operation with pressure, reactor coefficient of oxygen utilization is high, bacteria metabolism cycle time, reaction rate accelerates, thus substantially reduces the time of biological respinse and the volume of equipment, and reaction foreshortens to below 5h.
Under the high efficient mixed dissemination of microbubble generator 7, gas uniform is dispersed in sewage 1, eliminate routine biochemistry and react the gas-liquid mass transfer process of carrying out in pressure type biochemical reactor 8, improve reactor coefficient of oxygen utilization, decrease reaction required air 2 amount, and then making the gas-water ratio in pressure type biochemical reactor 8 be reduced to about 5, saving gas digestion amount, reduces waste gas 3 amount.
The water of discharging in pressure type biochemical reactor 8, owing to still containing a small amount of microbubble, and has certain pressure, so once decompression, the biological sludge 5 that microbubble adsorbs just can float up to liquid level rapidly, thus reaches the object of muddy water sharp separation.
Be preferred embodiment that described microbubble generator 7 is the microbubble generator of Venturi type pipe or shears contact bubble generator.
Microbubble generator 7 is bubble generator very ripe in ore dressing industry floatation equipment: the microbubble generator of Venturi type pipe, shearing contact bubble generator and micropore cutting foam maker etc.Its principle is, by liquid phase stream shearing force at a high speed, gas is cut into microbubble.
Be preferred embodiment that in described microbubble generator 7, the bubble diameter of cutting is less than 0.5mm.
When the diameter of bubble is too large, the dissolving situation of air 2 and sewage 1 can be had influence on, and then have influence on final result.
Be preferred embodiment that the operational condition of described pressure type biochemical reactor 8 is: temperature of reaction 15 DEG C-40 DEG C, reflux ratio 0.5-2, biochemical pressure is less than 100KPa.
Pressure type biochemical reactor 8, can be regarded as organism fluidization bed process or other biological membrane process craft equipment that the active sludge 5 method technique of operation with pressure, biomembrance process and active sludge 5 method have concurrently, the more similar normal pressure biochemical reactor of this pressure type biochemical reactor 8, mass-transfer efficiency, coefficient of oxygen utilization can improve 2-4 doubly, reaction efficiency is higher, and biochemical reaction required time is shorter.
After repetition test, when drawing best effect, the operational condition of reactor is: temperature of reaction 15-40 DEG C, reflux ratio 0.5-2, and biochemical pressure is less than 100KPa.
Be preferred embodiment that the reaction time of described pressure type biochemical reactor 8 is 3 hours-6 hours.
Lower than the reaction time of 3 hours, the metabolism of supporting well in pressure type biochemical reactor 8 completed thorough, and after being greater than 6 hours, without supporting metabolism well in pressure type biochemical reactor 8, or well foster metabolism is few.For avoiding high cost, through repetition test, show that best reaction time is 3-6 hour.
Be preferred embodiment that described pressure type biochemical reactor 8 fully-closed runs.
Pressure type biochemical reactor 8 is carried out totally enclosed operation, effectively can avoid leaking in the process of supporting well metabolism, and then cause the pollution to environment, and external environment is on the impact of supporting well metabolism.
Be preferred embodiment that the gas-water ratio in described pressure type biochemical reactor 8 is 6.
In the present embodiment, gas-water ratio is volume ratio.
Be preferred embodiment that it is 10min-60min that the mixture after biochemical reaction enters the disengaging time after in gas-liquid-solid three-phase separator 9.
Gas-liquid-solid three-phase separator 9 is atmospheric pressure device, and design disengaging time is 10 ~ 60min.Internal structure principle is similar to conventional perpendicular stream slurry tank.
Be preferred embodiment that the solid microbe mud 5 after gas-liquid-solid three-phase is separated is back in pressure type biochemical reactor 8 and recycles.
The solids outlet port of gas-liquid-solid three-phase separator 9 connects recycle pump 10, by the effect of recycle pump 10, the solid microbe mud 5 after being separated is refluxed to pressure type biochemical reactor 8, to allow to recycling, reaches maximum utilising efficiency.
Be preferred embodiment that air 2 compresses before entering microbubble generator 7.
After being compressed by air 2, air 2 can enter into microbubble generator 7 under the effect of the pressure of self, accelerates the efficiency of whole technological process.
For setting forth specific features of the present invention and effect further, will be illustrated by reference to the accompanying drawings.
By reference to the accompanying drawings 1, a kind of technological process of the present invention is:
For high-concentration organic chemical-industrial sewage 1, this organic chemical industry sewage 1 water-quality guideline is: COD:2000-4000mg/l, BOD:800-2000mg/l, ammonia nitrogen: 10-80mg/l.Sewage 1 enters microbubble generator 7 in the lump by the lifting of impeller pump and pressurized air 2, microbubble generator 7 selects Venturi type cast, sewage 1 fully mixes in microbubble generator 7 with pressurized air 2, make more air 2 especially oxygen dissolution in water, formed air-water mixture.Air-water mixture enters in pressure type biochemical reactor 8 with certain speed, the mud method technique that pressure type biochemical reactor 8 can select traditional active sludge 5 method similar, carries out microorganism and support metabolic reaction well in pressure type biochemical reactor 8.Gas-water ratio in pressure type biochemical reactor 8 is about 6, and hydraulic detention time is 5 hours, and the clearance of COD is close to 90%.Mixture after biochemical reaction enters in gas-liquid-solid three-phase separator 9, and in gas-liquid-solid three-phase separator 9, the time of separating mixture is 30min.The waste gas 3 of biochemical reaction generation is gone out from triphase separator top discharge, cleaner water is discharged on side direction top, the solid microbe mud 5 generated in biochemical reaction process is discharged in bottom, and solid microbe mud 5 is partly refluxed in biochemical reactor, a part of effluent sewerage 1 treatment system.Technical parameter of the present invention and traditional active sludge 5 method contrast as shown in table 1.
Table 1 this programme compares with traditional active sludge 5 technical data
Gas-liquid two-phase solubleness and dispersity is improved by novel microbubble technology, improve gas-liquid mass transfer efficiency and coefficient of oxygen utilization in biochemical reactor, and by increasing biochemical reactor pressure, improve the saturation solubility of oxygen in water also greatly to increase, thus making oxygen shift impellent increase, the rate of mass transfer of oxygen is enhanced.The raising of dissolved oxygen concentration, microbial biomass in bio-reactor can be made to increase, thus can improve the organic loading of reactor, reduce reactor volume, pressurization simultaneously can improve the rate of transform of oxygen, reduces bio-reactor air demand, saves aeration power consumption.
Pressure type microbubble biochemical reaction technique provided by the invention, under the high efficient mixed dissemination of microbubble generator 7, gas uniform is dispersed in sewage 1, eliminate routine biochemistry and react the gas-liquid mass transfer process of carrying out in the reactor, improve reactor coefficient of oxygen utilization, decrease reaction required air 2 amount, and then make reactor gas-water ratio be reduced to about 5, saving gas digestion amount, reduces waste gas 3 amount; Biochemical reactor water outlet, owing to still containing a small amount of microbubble, and has certain pressure, so once decompression, the biological sludge 5 that microbubble adsorbs just can float up to liquid level rapidly, thus reaches the object of muddy water sharp separation.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a pressure type microbubble biochemical reaction technique, is characterized in that, comprise the following steps:
S1: fully mixed in microbubble generator with air by sewage, forms air-water mixture;
S2: air-water mixture carries out microorganism well foster metabolic reaction to enter in pressure type biochemical reactor;
S3: the mixture after biochemical reaction enters in gas-liquid-solid three-phase separator, carries out gas-liquid-solid three-phase separation.
2. pressure type microbubble biochemical reaction technique according to claim 1, is characterized in that, described microbubble generator is microbubble generator or the whirlwind-type shearing contact bubble generator of Venturi type pipe.
3. pressure type microbubble biochemical reaction technique according to claim 1, it is characterized in that, the bubble diameter cut in described microbubble generator is less than 1mm.
4. pressure type microbubble biochemical reaction technique according to claim 1, it is characterized in that, the operational condition of described pressure type biochemical reactor is: temperature of reaction 15 DEG C-40 DEG C, and reflux ratio 0.5-2, biochemical pressure is less than 100KPa.
5. pressure type microbubble biochemical reaction technique according to claim 1, is characterized in that, the reaction time of described pressure type biochemical reactor is 3 hours-6 hours.
6. pressure type microbubble biochemical reaction technique according to claim 1, is characterized in that, described pressure type biochemical reactor fully-closed runs.
7. pressure type microbubble biochemical reaction technique according to claim 1, it is characterized in that, the gas-water ratio in described pressure type biochemical reactor is 6.
8. pressure type microbubble biochemical reaction technique according to claim 1, it is characterized in that, it is 30min-90min that the mixture after biochemical reaction enters the disengaging time after in gas-liquid-solid three-phase separator.
9. pressure type microbubble biochemical reaction technique according to claim 1, is characterized in that, the solid microbe sludge reflux after gas-liquid-solid three-phase is separated recycles to pressure type biochemical reactor.
10. the pressure type microbubble biochemical reaction technique according to any one of claim 1-9, it is characterized in that, air compresses before entering microbubble generator.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686213A (en) * | 2017-09-29 | 2018-02-13 | 重庆耐德水处理科技有限公司 | Oily wastewater treatment method and processing system |
| CN111003797A (en) * | 2019-12-27 | 2020-04-14 | 浙江永续环境工程有限公司 | Two-phase flow biological bed based on composite oil removing bacteria |
| CN111732297A (en) * | 2020-08-06 | 2020-10-02 | 中国石油化工股份有限公司 | Method and apparatus for enhancing natural attenuation of petroleum hydrocarbon contaminated groundwater |
| CN112481072A (en) * | 2019-09-11 | 2021-03-12 | 南京延长反应技术研究院有限公司 | Citric acid fermentation system and process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686213A (en) * | 2017-09-29 | 2018-02-13 | 重庆耐德水处理科技有限公司 | Oily wastewater treatment method and processing system |
| CN112481072A (en) * | 2019-09-11 | 2021-03-12 | 南京延长反应技术研究院有限公司 | Citric acid fermentation system and process |
| CN112481072B (en) * | 2019-09-11 | 2024-01-12 | 南京延长反应技术研究院有限公司 | Citric acid fermentation system and process |
| CN111003797A (en) * | 2019-12-27 | 2020-04-14 | 浙江永续环境工程有限公司 | Two-phase flow biological bed based on composite oil removing bacteria |
| CN111003797B (en) * | 2019-12-27 | 2021-11-02 | 浙江永续环境工程有限公司 | Two-phase flow biological bed based on composite oil removing bacteria |
| CN111732297A (en) * | 2020-08-06 | 2020-10-02 | 中国石油化工股份有限公司 | Method and apparatus for enhancing natural attenuation of petroleum hydrocarbon contaminated groundwater |
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Application publication date: 20160120 |