CN100334015C - System and method of anaerobic biological treatment for waste water - Google Patents

System and method of anaerobic biological treatment for waste water Download PDF

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CN100334015C
CN100334015C CNB2004101014968A CN200410101496A CN100334015C CN 100334015 C CN100334015 C CN 100334015C CN B2004101014968 A CNB2004101014968 A CN B2004101014968A CN 200410101496 A CN200410101496 A CN 200410101496A CN 100334015 C CN100334015 C CN 100334015C
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water
mud
anaerobic
cell
groove
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CN1796306A (en
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游惠宋
周珊珊
连水城
吴鸿荣
林信荣
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Industrial Technology Research Institute ITRI
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Industrial Technology Research Institute ITRI
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Abstract

The present invention relates to an anaerobic biological treatment system for wastewater containing organic pollutants, which comprises a reaction tank with an anaerobic sludge bed and a dissolved-air flotation removing tank, wherein the reaction tank with an anaerobic sludge bed uses anaerobic microorganisms for removing organic pollutants in wastewater in the reaction tank, the dissolved-air flotation removing tank is used for carrying out solid and liquid separation for solids in outflow water from the reaction tank with an anaerobic sludge bed to recover the anaerobic microorganisms flowing out from the reaction tank with an anaerobic sludge bed, and the anaerobic microorganisms are sent back to the reaction tank with an anaerobic sludge bed to improve the hydraulic load of the reaction tank with an anaerobic sludge bed.

Description

Anaerobic waste water biological treatment system and method
Technical field
The invention relates to a kind of anaerobic waste water biologic treating technique that contains organic pollutant, especially about a kind of in conjunction with floating anaerobic waste water biological treatment system and the method for removing technology of anaerobion treatment technology and dissolved air.
Background technology
The anaerobic biological treatment method is one of the most popular technology that contains in recent years the organic pollutant wastewater treatment, and anaerobic mud bed be this method anaerobe reactive tank of normal use, but because of the multiplication capacity of anaerobion low, therefore the gordian technique of anaerobic mud bed reactive tank is how a large amount of anaerobion of effectively catching accumulates on reactive tank, makes the function of anaerobic mud bed reactive tank reach optimizing.The anaerobic mud bed reactive tank of commercial applications for example has Biothane  UASB and BIOPAQ  UASB reactive tank at present.UASB is writing a Chinese character in simplified form of Upflow anaerobic sludge bed, means upwards mobile anaerobic mud bed.Novel patent also discloses a kind of UASB reactive tank No. 156653 to this case applicant in Taiwan.UASB reactive tank gordian technique is the wherein design of solid and gas liquid triphase separator.
The designing technique of previous triphase separator, be subject to the size of existing anaerobic mud bed reactive tank and the characteristic of microorganism (as the particle diameter of microorganism, density etc.), therefore very high limitation is arranged on hydraulic load, and the hydraulic load of typical unit surface (frontal projected area) is generally at 15~30m 3/ m 2-day.So when the organic contamination substrate concentration of waste water hanged down, the unit volume efficient of anaerobic mud bed reactive tank promptly was subjected to the restriction of hydraulics, can't bring into play due function.
Floating (the Dissolved air flotation that removes of dissolved air, abbreviation DAF) wastewater processing technology often is applied to the wastewater treatment of food factory, its mesohigh dissolved air mixes in the DAF groove with waste water, and form countless tiny bubbles and attach solids in waste water (for example clean meat produced fat and protein granule), so can strike off the air supporting solids that float on the waste water water surface at the top of DAF groove, and discharge treated water at the bottom or the middle part of DAF groove.The DAF groove can be buied on the commercial market, also is found in patent documentation, and for example United States Patent (USP) the 5382358th, 5538631,5863441,6174434 and No. 6599418.United States Patent (USP) discloses a kind of sewage treatment equipment in conjunction with DAF and gravity settling mechanism No. 6599418, wherein waste water is imported into the gravity settling cabin of the below of this equipment earlier, in the sedimentation of can going ahead of the rest of wherein heavier solids, the water that then contains lighter solids carries out general DAF processing by the DAF cabin that UNICOM's runner flows into the top of this equipment again, and wherein an air dissolves device is mounted in this UNICOM's runner.The content of case is merged in this case via the reference mode before No. the 6599418th, this United States Patent (USP).
Be engaged in this skill personage and it is generally acknowledged that anaerobion should avoid ingress of air, reduce with the capacity of decomposition that prevents its organic pollutant.Therefore, to so far, disclose or advise solving the hydraulic load restricted problem of anaerobion treatment technology without any Prior Art with the DAF wastewater processing technology.
Summary of the invention
This case contriver at first proposes a kind of anaerobic waste water biological treatment system and method in conjunction with anaerobion treatment technology and DAF wastewater processing technology.This case contriver finds that anaerobion contacts at the of short duration and air of DAF groove and can't reduce its capacity of decomposition to organic pollutant significantly.
Because the present invention replaces the solid and gas liquid triphase separator of having used the UASB reactive tank with the DAF wastewater processing technology, not only solves the low problem of UASB reactive tank hydraulic load, also reduce the first of anaerobic waste water biological treatment system and be set as this.
A kind of organic polluting water treatment system according to content of the present invention is finished comprises:
One anaerobic mud bed reactive tank, it has a cell body, and be located at one first water-in and one first water outlet of this cell body, this cell body be applicable to take up one anaerobic mud bed and receive a waste water that contains organic pollutant that flows into by this first water-in, this waste water stays for some time the back from this first water outlet outflow in this cell body, at least one part of the organic pollutant in this waste water of this residence time is decomposed by the anaerobion of this anaerobic mud bed Sludge Bed; And
The floating groove (being called for short the DAF groove) that removes of one dissolved air, it has a cell body, be located at one second water-in and one second water outlet of this cell body, one mixing device, and an air supporting mud removes device, wherein this second water-in connects this first water outlet, this mixing device is used for high pressure gas and going out that flowing water mixes and mixed high-pressure spray is released in this DAF groove cell body from this first water outlet, this air supporting mud removes device and is used for the intravital air supporting mud of this DAF groove groove is shifted out this DAF groove cell body, and second water outlet is used for discharging a treated water in this DAF groove cell body.
Preferable, aforementioned dissolved air is floating, and to remove groove be can further comprise a chemicals dosing plant or to send air supporting mud the e Foerderanlage of this an anaerobic mud bed reactive tank or a waste sludge storagetank back to.
Preferable, this second water outlet is positioned at the bottom or the middle part of this DAF groove cell body.
In organic polluting water treatment system of the present invention, the gas that is dissolved in this high-pressure spray descends because of the intravital pressure of DAF groove groove, form countless tiny bubbles and attach mud particle in waste water, so form the air supporting mud that floats on the waste water water surface at the top of this DAF groove.
In this anaerobic mud bed reactive tank, remove at least one part organic pollutant in the waste water by the anaerobic biological treatment method, reach the function of purification of waste water, when the waste water after purifying flowed out this anaerobic mud bed reactive tank, some anaerobion mud of can carrying under one's arms flowed out outside the reactive tank.This DAF groove, be arranged at this anaerobic mud bed reactive tank downstream, be to mix to be incorporated in the DAF groove by high pressure gas dissolved and waste water to discharge, countless tiny bubbles attach solids (for example microorganism mud particle) in waste water because of pressure release forms for dissolved air or any other suitable gas, so can strike off the air supporting mud that floats on the waste water water surface at the top of DAF groove, and discharge treated water at the bottom or the middle part of DAF groove.The air supporting mud (anaerobion) that this DAF groove is removed can be recycled to this anaerobic mud bed reactive tank, to improve the concentration of microorganism in the anaerobic mud bed reactive tank.
The anaerobic mud bed treatment technology of usefulness has the advantage of high volumetric efficiency to high-concentration waste water, but when organic concentration in the waste water reduces, because of being subject to hydraulics, make anaerobic mud bed treatment technology can't bring into play due efficient, the present invention is promptly in conjunction with anaerobion treatment technology and the floating treatment technology that removes of dissolved air, to overcome the waterpower restricted problem of using anaerobic mud bed treatment technology, be beneficial to further promote anaerobic mud bed treatment technology in solving problems such as handling city sewage, lower concentration organic industrial sewage.
Embodiment
The present invention also provides a kind of anaerobic waste water bioremediation, comprises the following step:
A) waste water and one that will contain organic pollutant contains the anaerobic mud bed of anaerobion and contacts, so at least one part organic pollutant in this waste water is decomposed by this anaerobion, purifies waste water and obtain some;
B) will purify waste water from the part of step a) and mix with a high pressure gas dissolved (for example high-pressure air), and the mixture that is obtained is released in the container, in this container, to form gas-liquid-solid mixture with most tiny bubbles, so these tiny bubbles attach the mud particle in gas-liquid-solid mixture, and in this container, form the air supporting mud that is positioned on the fluid surface;
C) this air supporting mud is removed from this container, and below this air supporting mud, discharge treated water.
Preferable, the inventive method further comprises the some of the air supporting mud that will remove from step c) or anaerobic mud bed some sources that whole recirculation are used as step a).
Preferable, the inventive method further comprises the some of the air supporting mud that will remove from step c) or all is delivered to a waste sludge storage tank.
Preferable, the inventive method further comprises coagulating agent is incorporated in purify waste water mixture with the high pressure gas dissolved of part in the step b).
A preferred embodiment of the present invention cooperates graphic being described as follows.Shown in Fig. 1 and 2, organic polluting water treatment system of the present invention, comprise: an anaerobic mud bed reactive tank 10, it has a cell body 11, and be located at one first water-in 12 and one first water outlet 13 of this cell body bottom, this cell body contains the anaerobic mud bed waste water that contains organic pollutant that is flowed into by this first water-in that reaches, this waste water stays for some time the back from these first water outlet, 13 outflows in this cell body, at least one part of the organic pollutant in this waste water of this residence time is decomposed by the anaerobion of this anaerobic mud bed Sludge Bed; And
The floating groove 20 (being called for short the DAF groove) that removes of one dissolved air, it has a cell body 21, is located at one second water-in 22 and one second water outlet, 23, one mixing devices 24 of this cell body, reach an air supporting mud and remove device 25, wherein this second water-in 22 connects these first water outlets 13.
This mixing device 24 comprises a force (forcing) pump 241, pressurized tank 242 and air compressor machine 243.This force (forcing) pump 241 will go out flowing water by these cell body 21 effusive somes and deliver in this pressurized tank 242 and the high-pressure airs from this air compressor machine 243 mix, so produce the water of a high air content, and flow out and go out flowing water and merge by first water outlet 13 of this anaerobic mud bed reactive tank 10 is effusive by this pressurized tank 242, enter through a divider 26 in the cell body 21 of this DAF groove.The high-pressure air that is dissolved in the water is beginning to form countless tiny bubbles because the hydraulic pressure in the cell body 21 is lower from this merging stream when divider 26 flows out.These tiny bubbles attach the mud particle in water, so form the air supporting mud that is positioned on the fluid surface in this cell body 21.This air supporting mud removes device 25 and collects the air supporting mud in this DAF groove cell body 21 and shift out this DAF groove cell body 21, so obtain a thickened sludge 27.Partly going out flowing water by these cell body 21 effusive another is discharged by this second water outlet 23 as a treated water.
These thickened sludge 27 recirculation can be sent back to this anaerobic mud bed reactive tank 10 and/or waste sludge storage tank by an e Foerderanlage 28.
Following examples are to be used for further understanding advantage of the present invention, are not to be used to limit claim of the present invention.
Description of drawings
Fig. 1 shows the block diagram according to the organic polluting water treatment process of the present invention's one preferred embodiment.
Fig. 2 shows the constructed profile of the DAF groove 20 among Fig. 1.
Fig. 3 shows the result of the anaerobic waste water bioremediation of the embodiment of the invention 1, wherein transverse axis be the operating time (hour) and the longitudinal axis be the influent stream water (round dot) of DAF groove and suspended solids (SS) concentration that goes out flowing water (square dot).
Fig. 4 shows with the floating pressure that removes the groove pressurized tank and is respectively 1,2,3 and 4kg/cm 2The result of the maximum methanogenesis activity (Qmax) of collected thickened sludge and primary sludge.
Reference numeral
10.. anaerobic mud bed reactive tank 11, the 21.. cell body
12,22.. water-in 13,23.. water outlet
20.. the floating groove (DAF groove) that removes of dissolved air
24.. mixing device 25.. air supporting mud removes device
26.. divider 27.. thickened sludge
28.. e Foerderanlage 241.. force (forcing) pump
242.. pressurized tank 243.. air compressor machine
Embodiment
Embodiment 1
The system of present embodiment is the system that comprises anaerobic mud bed reactive tank and DAF groove as shown in Figure 1.Test in food factory, this anaerobic mud bed treatment trough is the UASB reactive tank that utilizes real factory, and UASB itself disposes one group of triphase separator, and its hydraulic load is 16m 3/ m 2-day, UASB reactive tank volume is 390m 3, the processing water yield is 1000m 3/ day.This DAF groove is person as shown in Figure 2, comprises the cell body of 1.2 meters of diameters.Present embodiment is the triphase separator below from this UASB reactive tank, extracts the separation test that the 120L/min water yield is carried out the DAF groove with pump.Experimentation does not add chemical agent, and the hydraulic load of this DAF groove is 150m 3/ m 2-day, the pressure of pressurized tank is 4.5kg/cm 2, the backflow water yield is 50L/min.The result as shown in Figure 3, as can be seen from Figure 3 suspended solids (SS) concentration of this DAF groove influent stream water between 350~800mg/L, its go out flowing water then stable maintenance between 100~200mg/L.
Following examples 2 are assessed the anaerobism activity of the anaerobion that removes from the DAF groove with the maximum methanogenesis activity (Qmax) of anaerobion.
Embodiment 2
Experiment is carried out in batch mode, comprises anaerobic sludge is placed in the DAF groove, uses different pressurized tank pressure (pressurized tank pressure is big more, and the amount of oxygen that disengages is many more) to float and removes a set time (10 minutes).The floating thickened sludge that removes that to collect from DAF tank liquor face sees through identical anaerobion determination of activity program, measure the maximum methanogenesis activity (Qmax) of anaerobion, and with the specific activity of primary sludge (removing) without floating.
The mensuration program description of maximum methanogenesis activity (Qmax) is as follows.The microorganism triangular flask of packing into is added quantitative sodium-acetate and works as organism, blow out air in the triangular flask with nitrogen, again to include the rubber plug jam-pack of a gas duct.Gas duct is connected to an inversion Glass Containers that has scale to include liquid caustic soda.Install the swing oscillator of appropriate triangular flask as for 35 ℃ of water-bath temperature controls.When sodium-acetate is decomposed by the anaerobic methane bacterium, can produce CO 2With CH 4Two kinds of gases are directed in the inverted Glass Containers via gas duct, are collected in this with the draining gas collecting mode and are inverted in the Glass Containers.CO 2Gas is absorbed by alkali lye, and therefore being inverted the collected gas of Glass Containers is CH 4, experimental period is 24 hours, the CH of accumulative total 4Amount can be learnt by scale, after experiment finishes, measures the microbial biomass of every group of experiment, can calculate the Qmax of every group of experiment, and its unit is mL CH 4/ g-VSS-days.In this experiment being the blank group without the floating primary sludge that removes) result as shown in Figure 4, the Qmax of primary sludge is 187mL CH 4/ g-VSS-days (VSS represent volatile suspended solid thing-be microbial biomass); At the floating pressure that removes the groove pressurized tank is 1,2,3 and 4kg/cm 2The collected floating thickened sludge that removes, its Qmax value is between 185~202mL CH 4/ g-VSS-days.After considering experimental error, be 1,2,3 and 4kg/cm with the floating pressure that removes the groove pressurized tank 2The Qmax of its Qmax of collected thickened sludge and primary sludge is suitable, does not have the active situation that reduces of anaerobism to take place.

Claims (6)

1. organic polluting water treatment system comprises:
One anaerobic mud bed reactive tank, it has a cell body, and be located at one first water-in and one first water outlet of this cell body, this cell body be applicable to take up one anaerobic mud bed and receive a waste water that contains organic pollutant that flows into by this first water-in, this waste water stays for some time the back from this first water outlet outflow in this cell body, at least one part of the organic pollutant in this waste water of this residence time is decomposed by the anaerobion of this anaerobic mud bed Sludge Bed; And
The floating groove that removes of one dissolved air, it has a cell body, be located at one second water-in and one second water outlet of this cell body, one mixing device, and an air supporting mud removes device, wherein this second water-in connects this first water outlet, this mixing device is used for high pressure gas and going out that flowing water mixes and mixed high-pressure spray being released into this dissolved air is floating to be removed in the groove cell body from this first water outlet, this air supporting mud removes device and is used for the floating intravital air supporting mud of groove groove that removes of this dissolved air is shifted out the floating groove cell body that removes of this dissolved air, reaches second water outlet and is used for discharging a treated water in the groove cell body from floating the removing of this dissolved air;
One e Foerderanlage, it is to send this an anaerobic mud bed reactive tank or a waste sludge storagetank back to shifting out the floating air supporting mud that removes the groove cell body of dissolved air.
2. organic polluting water treatment system as claimed in claim 1, wherein this second water outlet is positioned at floating bottom or the middle part of removing the groove cell body of this dissolved air.
3. organic polluting water treatment system as claimed in claim 1, wherein the floating groove that removes of this dissolved air further comprises a chemicals dosing plant.
4. anaerobic waste water bioremediation comprises the following step:
A) waste water and one that will contain organic pollutant contains the anaerobic mud bed of anaerobion and contacts, so at least one part organic pollutant in this waste water is decomposed by this anaerobion, purifies waste water and obtain some;
B) will purify waste water from the part of step a) and mix with a high pressure gas dissolved, and the mixture that is obtained is released in the container, in this container, to form gas-liquid-solid mixture with most tiny bubbles, so these tiny bubbles attach the mud particle in gas-liquid-solid mixture, and in this container, form the air supporting mud that is positioned on the fluid surface;
C) this air supporting mud is removed from this container, and below this air supporting mud, discharge treated water;
The air supporting mud that will remove from step c) a part of or all recirculation be used as anaerobic mud bed some sources of step a).
5. method as claimed in claim 4, it further comprises the some of the air supporting mud that will remove from step c) or all is delivered to a waste sludge storage tank.
6. method as claimed in claim 4, it further comprises coagulating agent is incorporated in purify waste water mixture with the high pressure gas dissolved of part in the step b).
CNB2004101014968A 2004-12-21 2004-12-21 System and method of anaerobic biological treatment for waste water Active CN100334015C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101891343B (en) * 2010-07-12 2011-12-14 西安建筑科技大学 Method for biologically purifying municipal sewage and recovering resources
CN110563137A (en) * 2019-10-21 2019-12-13 郑州轻工业学院 Device and method for determining influence rule of pollution factors on biological activity of anaerobic process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1058575A (en) * 1991-06-06 1992-02-12 平湖县环境保护监测站 The treatment process of filature frigon waste water
JPH05277493A (en) * 1992-03-31 1993-10-26 Ishikawajima Harima Heavy Ind Co Ltd Method for treatment of waste water containing oil
JP5277493B2 (en) * 2008-10-09 2013-08-28 国立大学法人東京工業大学 New polymer organic compound and ion exchanger, electrolyte membrane, catalyst, membrane electrode assembly, fuel cell using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1058575A (en) * 1991-06-06 1992-02-12 平湖县环境保护监测站 The treatment process of filature frigon waste water
JPH05277493A (en) * 1992-03-31 1993-10-26 Ishikawajima Harima Heavy Ind Co Ltd Method for treatment of waste water containing oil
JP5277493B2 (en) * 2008-10-09 2013-08-28 国立大学法人東京工業大学 New polymer organic compound and ion exchanger, electrolyte membrane, catalyst, membrane electrode assembly, fuel cell using the same

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