CN204185296U - A kind of rotating electrode biofilm reactor - Google Patents
A kind of rotating electrode biofilm reactor Download PDFInfo
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- CN204185296U CN204185296U CN201420632404.8U CN201420632404U CN204185296U CN 204185296 U CN204185296 U CN 204185296U CN 201420632404 U CN201420632404 U CN 201420632404U CN 204185296 U CN204185296 U CN 204185296U
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Abstract
The utility model proposes a kind of rotating electrode biofilm reactor, comprise reactor cell body, bottom, the middle part of described reactor cell body are communicated with rising pipe with water inlet pipe, return line respectively with top; Described return line is communicated with water inlet pipe; Described reactor cell body top is provided with seal cover board; The lower end of the output shaft of agitator is connected with the plate-like cathode being positioned at described reactor cell body through after described seal cover board; Described plate-like cathode is sticked and has active carbon fiber felt; The lower end of rod anode is positioned at described reactor cell body, and upper end is electrically connected with the positive pole of D.C. regulated power supply through after described seal cover board; The utility model does not need additional whipping appts, without the need to external source hydrogen supply, simplifies operating process; The good sealing property of reactor is that microbial growth provides anoxia condition, effectively can remove multiple oxidative pollutant in water body.
Description
Technical field
The utility model relates to sewage treatment area, particularly a kind of rotating electrode biofilm reactor.
Background technology
Along with industrial or agricultural and socioeconomic development, oxidative pollutant increases the weight of gradually to the pollution that water body causes, and these oxidizing substances mainly comprise nitrate, bromate, perchlorate and volatile organic matter as chloroform etc.In oxidizing substance, the representational pollutent of most is nitrate, the nitrogenous effluent discharged in Industrial processes; The nitrogenous fertilizer agriculturally used enters rivers, lake with rain drop erosion; Resident living sewage enters receiving water body; In the water bodys such as the underground water caused therefrom, tap water nitrate nitrogen pollution oneself become the serious problems that we face at present.
Traditional biological denitrification process is that the denitrification existed by nature (makes NO under microbial process
3 --N is finally converted into N
2o and N
2), utilize the organism in water body, or by adding organism methyl alcohol, ethanol etc. as electron donor, nitrate nitrogen is finally converted into nontoxic nitrogen.By adding organism, higher denitrification rate can be obtained, but carbon source addition being difficult to control, easily occurring the not enough or organic residual problem of carbon source.When additional carbon is not enough, denitrification is incomplete; When additional carbon is excessive, then water outlet COD value increases, and both have impact on effluent quality and has turn increased working cost.
Along with going deep into of research, hydrogen matrix membrane biofilm reactor (MBfR) becomes a kind of biological new technology of denitrogenation gradually.Hydrogen matrix MBfR utilizes external source hydrogen as electron donor, hollow-fibre membrane is as biofilm carrier, contaminated water is in fiber rete flows outside, hydrogen passes in hollow-fibre membrane with certain pressure, skin is diffused into by micropore under pressure from the internal layer of film, utilized as electron donor by the hydrogen autotrophic bacteria in microbial film in by the microbial film process of tunica fibrosa outgrowth, autotrophic bacteria is by the reduction of water oxygen voltinism pollution substance or degraded simultaneously, as nitrate is thoroughly reduced to nitrogen, bromate is reduced into nontoxic bromide anion, thus reach the object purified water.This technology is by the Pollutant effects such as external source hydrogen supply and film surface deposition calcium salt, as improvement, current some scholars proposes the concept of biofilm-electrode process, electrolysis aquatic products hydrogen is changed into by external source hydrogen supply, using the hydrogen of brine electrolysis generation as electron donor, oxidative pollutant, as electron acceptor(EA), utilizes the microbial film overlaying on reactor cathode surface, directly by pollutent reduction or degradeds such as the nitrate in water body, bromates.The method does not have an impact the by product of water quality safety, is a kind of clean water body oxidative pollutant removal technology.
At present, biofilm-electrode process all adopts fixed electorde, need additional whipping appts to promote contact and the mixing of pollutent and microorganism, and the resistance to air loss of reactor is poor, cannot provide and be beneficial to denitrifying anaerobic environment, there is very large defect.
Utility model content
Based on the deficiencies in the prior art, the technical problems to be solved in the utility model is to provide a kind of rotating electrode biofilm reactor, has that energy consumption is low, hydrogen utilization ratio is high, the feature of good sealing effect.
For solving the problems of the technologies described above, the utility model provides a kind of rotating electrode biofilm reactor, comprises reactor cell body, and water inlet pipe is communicated with the bottom of described reactor cell body after valve one through pump one successively; One end of return line is communicated with the water inlet pipe part between pump one with valve one, and the other end is communicated with the middle part of described reactor cell body after valve two through pump two successively; Rising pipe is communicated with the top of described reactor cell body after valve three; Described reactor cell body top is provided with seal cover board; The output shaft lower end being positioned at the agitator above seal cover board connects through the plate-like cathode with described reactor cell body after described seal cover board; Described plate-like cathode is sticked and has active carbon fiber felt; The upper end being positioned at the rod anode of described reactor cell body is electrically connected through the positive pole with D.C. regulated power supply after described seal cover board; The negative pole of described D.C. regulated power supply and the electrical connection of graphite brush sheet, described graphite brush sheet contacts with the output shaft of described agitator.
Further improvement as technique scheme:
The cylindrical water tank of described reactor cell body to be volume be 0.9 ~ 4.9L.
The output shaft of described agitator is divided into the upper axle stretched out with agitator motor and the lower shaft be connected with described plate-like cathode, is connected and make to insulate between upper axle and lower shaft between upper axle and lower shaft by isolating joint.
Gask-O-Seal is provided with below described seal cover board; Described seal cover board is provided with anode hole and the rabbling door of band cushion rubber, ensures sealing property.
Described plate-like cathode is the metal copper sheet of long 8cm, wide 8cm, thick 0.5cm, and the active carbon fiber felt thickness of surface adhesion is 0.3 ~ 0.5cm.
Described rod anode is long 10 ~ 15cm, and diameter is graphite rod or the inert metal rod of 0.5 ~ 1.0cm.
Described agitator is the reinforcement electric mixer being arranged on iron stand, and speed of rotation is 5 ~ 20 revs/min.
The strength of current of described D.C. regulated power supply is 20 ~ 110mA.
Algorithm of the present utility model is: certain density active sludge is placed in the inoculation of reactor cell body by (1), and regularly in reactor, the nutrient solution added containing oxidative pollutant is cultivated; (2) tame between incubation period, maintain certain temperature of reactor and strength of current maintenance, carry out micro-electric current domestication biofilm of microorganism; (3) after having tamed, pending waste water joins in reactor by constant flow pump through water inlet pipe, controls strength of current and hydraulic detention time, with the continuous operation of realization response device and good treatment effect simultaneously.
Specific works process of the present utility model refers to embodiment part.
The utility model tool has the following advantages:
(1) reactor negative electrode is made into rotary vane type, and inert metal sheet surface adhesion has active carbon fiber felt, is conducive to improving microorganism colonization speed.
(2) reactor cathodic electrolytic water original position produces hydrogen, and hydrogen is from negative electrode to external diffusion, and the microorganism that effectively can be attached to cathode surface directly utilizes, and compared with extraneous hydrogen supply, on mass transfer direction He on mass transfer power, has enhancing.
(3) microorganism of cathode surface utilizes brine electrolysis original position to produce hydrogen as electron donor, and adjustment current density that can be suitable controls hydrogen generating quantity.
(4) reactor negative electrode can slow circumvolve, does not need additional whipping device, decreases the consumption of electricity, simplify operation steps, be easy to running maintenance.
(5) resistance to air loss of reactor is good, and the anaerobic environment provided is conducive to denitrifying carrying out.
Describe the utility model in detail below in conjunction with accompanying drawing, it illustrates principle of the present utility model as the part of this specification sheets by embodiment, and other side of the present utility model, feature and advantage thereof will become very clear by this detailed description.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.
Fig. 1 is the utility model reactor body structural representation;
Fig. 2 is the utility model reactor cap plate structure schematic diagram;
Fig. 3 is the Electronic Speculum schematic diagram before the utility model reactor negative electrode biofilm has been tamed;
Fig. 4 is the Electronic Speculum schematic diagram after the utility model reactor negative electrode biofilm has been tamed;
Fig. 5 is the nitrate of the utility model reactor middle and high concentration and bromate water inlet, aqueous concentration schematic diagram;
Fig. 6 is that the utility model reactor is to the nitrate of high density and bromate removal effect schematic diagram;
Fig. 7 is the nitrate of lower concentration in the utility model reactor and bromate water inlet, aqueous concentration schematic diagram;
Fig. 8 is that the utility model reactor is to the nitrate of lower concentration and bromate removal effect schematic diagram.
Wherein: 1-agitator; 2-isolating joint; 3-graphite brush sheet; 4-rod anode; 5-plate-like cathode; 6-reactor cell body; 7-iron stand; 8-D.C. regulated power supply; 9-rising pipe; 10-return line; 11-water inlet pipe; 12-seal cover board; 13-standing bolt and nut; 14-Gask-O-Seal; 15-anode hole; 16-rabbling door; 17-pump one; 18-pump two; 19-valve one; 20-valve two; 21-valve three.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.For sake of convenience, hereinafter as occur " on ", D score, "left", "right" printed words, only represent consistent with the direction, upper and lower, left and right of accompanying drawing itself, restriction effect is not played to structure.
As shown in Figure 1-2, the rotating electrode biofilm reactor of the present embodiment, comprises reactor cell body 6, and water inlet pipe 11 is communicated with the bottom of reactor cell body 6 after valve 1 through pump 1 successively; One end of return line 10 is communicated with water inlet pipe 11 part between pump 1 with valve 1, and the other end is communicated with the middle part of reactor cell body 6 after valve 2 20 through pump 2 18 successively; Rising pipe 9 is communicated with the top of reactor cell body 6 after valve 3 21; Reactor cell body 6 top is provided with seal cover board 12; The output shaft lower end being positioned at the agitator 1 above seal cover board 12 connects through the plate-like cathode 5 with reactor cell body 6 after seal cover board 12; Plate-like cathode 5 is sticked and has active carbon fiber felt; The upper end being positioned at the rod anode 4 of reactor cell body 6 is electrically connected through the positive pole with D.C. regulated power supply 8 after seal cover board 12; Negative pole and the graphite brush sheet 3 of D.C. regulated power supply 8 are electrically connected, and graphite brush sheet 3 contacts with the output shaft of agitator 1.Reactor cell body 6 for volume be the cylindrical water tank of 0.9 ~ 4.9L.The output shaft of agitator 1 is divided into the upper axle stretched out with agitator motor and the lower shaft be connected with plate-like cathode 5, is connected and make to insulate between upper axle and lower shaft between upper axle and lower shaft by isolating joint 2.Gask-O-Seal 14 is provided with below seal cover board 12; Seal cover board 12 is provided with anode hole 15 and the rabbling door 16 of band cushion rubber.Plate-like cathode 5 is the metal copper sheet of long 8cm, wide 8cm, thick 0.5cm, and the active carbon fiber felt thickness of surface adhesion is 0.3 ~ 0.5cm.Rod anode 4 is long 10 ~ 15cm, and diameter is graphite rod or the inert metal rod of 0.5 ~ 1.0cm.Agitator 1 is for being arranged on the reinforcement electric mixer of iron stand 7, and speed of rotation is 5 ~ 20 revs/min.The strength of current of D.C. regulated power supply 8 is 20 ~ 110mA.
First will carry out the biofilm domestication of microorganism during utility model works, the returned sluge getting 0.2L sewage work, as seed sludge, is blended in polyethylene casing 6 that volume is 1.3L with nutrient solution and inoculates.Regularly add in reactor and carry out biofilm cultivation containing certain density nitrate and bromate waste water, and suitably extra-nutrition material is to ensure microorganism normal growth, it is 30 DEG C that external heat (hot water) maintains temperature of reactor, and strength of current maintains 20mA.Regularly intake to reactor through water inlet pipe 11 by constant flow pump, carry out micro-electric current domestication biofilm of microorganism.After domestication 15d, reactor water outlet pH is stabilized between 6.5 ~ 8.0, and the clearance of nitrate and bromate reaches more than 70%, can judge that domestication completes substantially.At reactor run duration, graphite anode rod part is oxidized, the oxidation products CO of anode
2can be autotrophic denitrification bacterium and carbon source is provided, simultaneously to the OH produced in denitrification process
-there is certain shock absorption, and can anaerobic environment be strengthened, be conducive to denitrifying carrying out.
Observe under reactor cathode surface is placed in the electron microscope of 500 times before and after biofilm and domestication, obtain electron microscope picture as shown in Figure 3.As can be seen from Figure 3, before biofilm, the active carbon fiber felt that cathode surface sticks has many fiber fines, and fiber is covered with micropore, and Fibre diameter is 5 ~ 20 μm.And after taming 15d, cathode surface forms the faint yellow microbial film of one deck, there are a large amount of particulate state and cotton-shaped attached growth of microorganisms, see Fig. 4.Result shows, microorganism energy normal growth in reactor is also smooth in cathode surface biofilm, further illustrates reactor and has tamed.
To dispose of sewage example 1:
Structure of reactor is described above, and after above-mentioned biofilm flow process terminates, process the simulated wastewater prepared by tap water, wherein nitrate concentration is 30 ~ 35mg/L, and bromate concentration is 0.9 ~ 1.0mg/L.Anode is two long 15cm, diameter is the graphite rod of 0.8cm, be placed in rotating cathode both sides, negative electrode adopts the metal copper sheet of long 8cm, wide 8cm, thick 0.5cm, the active carbon fiber felt that surface adhesion is onesize, strength of current is set as 20mA, and hydraulic detention time is 5h, utilizes constant flow pump to supply artificial distribution continuously.As can be seen from accompanying drawing 5 and 6, the utility model has good removal effect to nitrate and bromate, and nitrate removal rate is more than 70%, and bromate clearance is more than 80%.In water outlet, nitrate concentration is lower than 10 mg/L, lower than the standard gauge threshold value (NO of the existing tap water of China
3 --N≤20mg/L).
To dispose of sewage example 2:
Structure of reactor is described above, and after above-mentioned biofilm flow process terminates, process the simulated wastewater prepared by tap water, wherein nitrate concentration is 25 ~ 30mg/L, and bromate concentration is 0.14 ~ 0.16 mg/L.Anode is two long 15cm, diameter is the graphite rod of 0.8cm, be placed in rotating cathode both end sides, negative electrode adopts the metal copper plate of long 8cm, wide 8cm, thick 0.5cm, the active carbon fiber felt that surface adhesion is onesize, strength of current is set as 20mA, and hydraulic detention time is 5h, utilizes constant flow pump to supply artificial distribution continuously.As can be seen from accompanying drawing 7 and 8, the utility model has good removal effect to close to the nitrate of actual water body concentration and bromate, nitrate removal rate is more than 90%, bromate clearance is more than 92%, in water outlet, nitrate concentration is lower than 5mg/L, bromate concentration lower than 10 μ g/L, lower than China existing drinking water standard prescribed limits (NO
3 --N≤20mg/L; BrO
3 -≤ 10 μ g/L).This treatment effect be hydrogen matrix membrane biofilm reactor and common Electrode-biofilm membrane reactor be difficult to realize.Compared with example 2, the removal efficiency of nitrate and bromate is all improved, and both aqueous concentration are low, under showing lower concentration nitrate and bromate condition, is conducive to the denitrification of microorganism, and then improves degradation efficiency.
Visible, with additional carbon in prior art as electron donor and added hydrogen as electron donor method compared with, the utility model adopts the mode of hydrogen internal feed, and hydrogen utilization brine electrolysis produces, and can control hydrogen generating quantity by regulating current density.Reactor negative electrode is arranged to rotary vane type, does not need additional whipping appts, and the hydrogen that negative electrode produces can be attached superincumbent microorganism efficiency utilization, simplifies operating process, facilitates denitrifying carrying out.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a rotating electrode biofilm reactor, comprises reactor cell body (6), it is characterized in that: water inlet pipe (11) is communicated with the bottom of described reactor cell body (6) after valve one (19) through pump one (17) successively; One end of return line (10) is communicated with water inlet pipe (11) part between pump one (17) with valve one (19), and the other end is communicated with the middle part of described reactor cell body (6) after valve two (20) through pump two (18) successively; Rising pipe (9) is communicated with the top of described reactor cell body (6) after valve three (21); Described reactor cell body (6) top is provided with seal cover board (12); The output shaft lower end being positioned at the agitator (1) of seal cover board (12) top connects through the plate-like cathode (5) with described reactor cell body (6) after described seal cover board (12); Described plate-like cathode (5) is sticked and has active carbon fiber felt; The upper end being positioned at the rod anode (4) of described reactor cell body (6) is through the positive pole electrical connection of described seal cover board (12) same to D.C. regulated power supply (8) afterwards; The negative pole of described D.C. regulated power supply (8) and graphite brush sheet (3) electrical connection, described graphite brush sheet (3) contacts with the output shaft of described agitator (1).
2. rotating electrode biofilm reactor according to claim 1, is characterized in that: described reactor cell body (6) for volume be the cylindrical water tank of 0.9 ~ 4.9L.
3. rotating electrode biofilm reactor according to claim 1, it is characterized in that: the output shaft of described agitator (1) is divided into the upper axle stretched out with agitator motor and the lower shaft be connected with described plate-like cathode (5), connected by isolating joint (2) between upper axle and lower shaft and make to insulate between axle and lower shaft.
4. rotating electrode biofilm reactor according to claim 1, is characterized in that: described seal cover board (12) below is provided with Gask-O-Seal (14); Described seal cover board (12) is provided with anode hole (15) and the rabbling door (16) of band cushion rubber.
5. rotating electrode biofilm reactor according to claim 1, is characterized in that: described plate-like cathode (5) is long 8cm, the metal copper sheet of wide 8cm, thick 0.5cm, and the active carbon fiber felt thickness of surface adhesion is 0.3 ~ 0.5cm.
6. rotating electrode biofilm reactor according to claim 1, is characterized in that: described rod anode (4) is long 10 ~ 15cm, and diameter is graphite rod or the inert metal rod of 0.5 ~ 1.0cm.
7. rotating electrode biofilm reactor according to claim 1, is characterized in that: described agitator (1) is for being arranged on the reinforcement electric mixer of iron stand (7), and speed of rotation is 5 ~ 20 revs/min.
8. rotating electrode biofilm reactor according to claim 1, is characterized in that: the strength of current of described D.C. regulated power supply (8) is 20 ~ 110mA.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632404.8U CN204185296U (en) | 2014-10-29 | 2014-10-29 | A kind of rotating electrode biofilm reactor |
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| CN201420632404.8U CN204185296U (en) | 2014-10-29 | 2014-10-29 | A kind of rotating electrode biofilm reactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310581A (en) * | 2014-10-29 | 2015-01-28 | 湖南大学 | Rotary electrode biomembrane reactor and method for treating oxidizing pollutants |
| CN105712469A (en) * | 2016-02-04 | 2016-06-29 | 东南大学 | Aerobic drum-type microbial film electrochemical reactor and application thereof |
| CN108658213A (en) * | 2018-04-19 | 2018-10-16 | 浙江工商大学 | A kind of electrochemical appliance and method in situ accelerating anaerobic in low temperature microbial acclimation |
-
2014
- 2014-10-29 CN CN201420632404.8U patent/CN204185296U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310581A (en) * | 2014-10-29 | 2015-01-28 | 湖南大学 | Rotary electrode biomembrane reactor and method for treating oxidizing pollutants |
| CN104310581B (en) * | 2014-10-29 | 2016-09-07 | 湖南大学 | A kind of rotation electrode biofilm reactor and the method processing oxidative pollutant |
| CN105712469A (en) * | 2016-02-04 | 2016-06-29 | 东南大学 | Aerobic drum-type microbial film electrochemical reactor and application thereof |
| CN105712469B (en) * | 2016-02-04 | 2018-07-17 | 东南大学 | Aerobic drum-type microbial film electrochemical reactor and its application |
| CN108658213A (en) * | 2018-04-19 | 2018-10-16 | 浙江工商大学 | A kind of electrochemical appliance and method in situ accelerating anaerobic in low temperature microbial acclimation |
| CN108658213B (en) * | 2018-04-19 | 2021-08-03 | 浙江工商大学 | Electrochemical device and method for in-situ acceleration of low-temperature anaerobic microorganism domestication |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160907 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |