CN204779029U - Organic waste processing apparatus and be equipped with device's anaerobic tank - Google Patents
Organic waste processing apparatus and be equipped with device's anaerobic tank Download PDFInfo
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- CN204779029U CN204779029U CN201520335588.6U CN201520335588U CN204779029U CN 204779029 U CN204779029 U CN 204779029U CN 201520335588 U CN201520335588 U CN 201520335588U CN 204779029 U CN204779029 U CN 204779029U
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Abstract
The utility model relates to a waste water treatment technology field specifically discloses an organic waste processing apparatus, including adjustable DC power supply, a set of adj. Tabular oxidizing electrode and reducing electrode, the oxidizing electrode contacts with one side and parallel counterpoint that the reducing electrode is located the barrier film respectively, and the barrier film is the diffusion barrier of water permeability or porosity, and oxidizing electrode and reducing electrode include the base member and be located its surperficial homogeneous coating, and the base member is one kind or several kinds among carbon fabric, graphite, the carbon nanotube, and cladding material is carbon nanotube, nickel thing or both mixtures. A be equipped with this organic waste processing apparatus's anaerobic tank, includes pan feeding mouth, discharge gate and gas vent, and every cubic metre of area that sets up that digests pond internal oxidation electrode and reducing electrode is 1-20 square metre, and each is organized the electrode and erects form align to grid, and each is organized, and the distance is 1-30cm between the electrode. The utility model discloses can improve organic waste's anaerobic digestion efficiency, have and implement convenient, with low costs advantage.
Description
Technical field
The utility model relates to technical field of waste water processing, particularly relates to a kind of wastewater anaerobic digestive device.
Background technology
Anaerobic digestion refers under the effect of anaerobion, makes the organism that can be biodegradable in waste be converted into the Biochemical processes of methane, carbonic acid gas and other stable materials by anaerobic digestion.Anaerobic digestion is sewage sludge, food refuse, farming animals waste, fecaluria, brew alcoholic beverages paper waste and to bury this kind of organic content such as rubbish infiltration high, and from these wastes, extract the technology of methane.
Organic anaerobic digestion process is divided into three phases usually:
One, hydrolysis stage: insoluble larger molecular organics in sewage, as polysaccharide, starch, Mierocrystalline cellulose, hydro carbons (alkane, alkene, alkynes etc.) hydrolysis, primary product is formic acid, acetic acid, propionic acid, butyric acid, lactic acid, and and then amino acid, protein, fat splitting generate ammonia and amine.In this stage, organism state is very unstable, and speed changes the form that can be utilized by microorganism lentamente into, so this process need longer reaction times.
Two, souring stage: hydrolysis of organic matter is converted into the 1st micromolecular organism that directly can be utilized by methanobacteria by fermenting bacteria, as acetic acid, formic acid, methyl alcohol and methylamine etc.; 2nd class is the organism that directly can not be utilized by methanobacteria, and as propionic acid, butyric acid, lactic acid, ethanol etc., incomplete anaerobic digestion or fermentation leave it at that.In general, at souring stage, pH maintains near 6.5, very fast relative to other stages in digester.But toxic due to stage hydrolysis products, makes the concentration of the acidizing product (as monose, hydrogen and organic acid) in anaerobic digestion raise, thus affects overall anaerobic reaction.
Three, the methane phase stage: methane-producing bacteria is converted into methane matrix such as formic acid, acetic acid, methylamine, methyl alcohol by different approaches.Because the speed of growth that methanogen is relatively slow, the methane phase stage to carry out speed also relatively slow.Particularly methanogen is easily subject to toxicant, temperature, the impact of the conditions such as pH.As temperature aspect, need to maintain 35 DEG C (mesophilic digestions) or 55 DEG C (thermophilic digestion) to realize the steady running of anaerobic digestion, this needs to drop into substantial contribution.
As can be seen here, souring stage and slower hydrolysis faster and methane phase stage are the maximum reasons affecting anaerobic digestion efficiency.Therefore how controlling the speed of response of this three phases, make each stage reach equilibrium state, is the key realizing high efficient anaerobic digestion.
Between 30 or 40 years in the past, investigators carry out the polymer substance of decomposing organic matter by some pretreatment processs such as thermal treatment, ultrasonic treatment, acid-alkali treatment, improve the speed of hydrolysis stage with this.Simultaneously, some investigators are had to utilize the feature of comparatively slow and its high detergent power of methanogen pace of change, develop anaerobic filter, upflow anaerobic sludge blanket reactor, particularly, the anaerobic membrane bioreactor of high density anaerobion can be maintained, not only can process the organic wastewater of high density, and be applicable to the organic wastewater processing general effluent sewerage and other lower concentrations.
But, because these polymer substances such as sewage sludge, livestock products waste water, food refuse contain more organic waste, need to drop into too much manpower and materials and carry out pre-treatment to improve the hydrolysis rate of anaerobic digestion.Further, to improve anaerobic filter or the upflow anaerobic sludge blanket reactor of methanogen concentration, because the solid that the waste flowed into contains is piled up in the reactor often, and methanogen is made not reach sufficient quantity.Anaerobic membrane bioreactor because the blockage problem of film, does not usually reach the effect of anticipation in actually operating yet.
Recently, the microorganism electrolysis cell having some investigators to utilize bioelectrochemistry to develop is attempted to solve above-mentioned anaerobic digestion problem.Oxidizing electrode and reducing electrode are set in anaerobic digester, and between electrode, maintain certain voltage, make microorganic adhesion on reduction-oxidation electrode, and the activity improving plankton is to improve acidification reaction and hydrogen generates.The microorganism electrolysis cell developed with this principle is 2 Room shapes mostly, and technique utilizes ion-exchange membrane isolation oxidation electrode and reducing electrode to improve the proportion of production of hydrogen.But 2 Room shaped reaction devices because the reason of ion-exchange membrane blocking and size, and have significant limitation in actually operating and amplificationization.Although there is some software engineering researchers invent 1 Room shape microorganism electrolysis cell, do not reach desirable effect due to the selection of redox electrode material or the improper of set-up mode.Further, this kind of technology utilizing microorganism electrolysis cell hydrogen producing in next life, because the unstable of the unstable of acidifying microbes and hydrogen, and can not be widely deployed in the middle of actual life.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of organic waste treatment device and is provided with the digester of this device, can improve the anaerobic digestion efficiency of organic waste, have and implement advantage easily.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of organic waste treatment device, comprise adjustable DC power supply, one group of oxidizing electrode and reducing electrode, and the barrier film be located between described oxidizing electrode and reducing electrode, described oxidizing electrode, reducing electrode is connected with described adjustable DC power supply respectively, described oxidizing electrode, reducing electrode is battery lead plate, described oxidizing electrode contacts with the parallel contraposition of the one side of described barrier film, described reducing electrode contacts with the parallel contraposition of the another side of described barrier film, described barrier film is water-permeable or porous separatory membrane, described oxidizing electrode and reducing electrode comprise matrix and are positioned at the homogeneous coating on its surface, described matrix is carbon fibre fabric, graphite, one or more in carbon nanotube, described coating is carbon nanotube, nickel compound or both mixtures.
Further, described oxidizing electrode and reducing electrode are provided with equally distributed electric current channelizing line, and electric current can be made to be evenly distributed on described oxidizing electrode and reducing electrode.
Described electric current channelizing line is Stainless Steel Wire or titanium silk.
A kind of anaerobic digester being provided with organic waste treatment device described above, comprise feeding mouth, discharge port and venting port, described organic waste treatment device is provided with multiple, and the setting area of every cubic metre of digester internal oxidition electrode and reducing electrode is 1 ~ 20 square metre, each group of electrode erect form is evenly distributed, and the spacing of each group electrode is 1 ~ 30cm.
Further, whipping appts is provided with in described digester.
Further, described digester is round shape, and described whipping appts is positioned at the middle part of round shape digester, and the rounded arrangement of each group electrode is evenly distributed on around described whipping appts.
The beneficial effect adopting technique scheme to produce is: organic waste treatment device adopts the carbon-based materials such as carbon fibre fabric, graphite, carbon nanotube as electrode matrix, relative to conventional anaerobic digestion device electrode used therein material, there is acid corrosion-resistant, oxidation resistant advantage, long service life, its basic pore texture own has higher specific surface area simultaneously, the adhesive rate of microorganism on electrode can be improved, thus increase the anaerobic digestion amount to organic waste; Carbon nanotube, nickel compound etc., as electrode matrix coating, had both enhanced the electroconductibility of electrode, enhanced the affine methanogenic catalytic of microorganism simultaneously, were conducive to the generation in anaerobic reaction; Oxidizing electrode, barrier film, reducing electrode adopt integrated design, use simple, flexible, do not need to increase unnecessary quantities at existing anaerobic digester, only need arrange simply in anaerobic digester and organize redox electrode more, input cost is low, applied widely.The interior specific surface area larger by electrode of digester and whipping appts are to the stirring of Digestive system, and more extensively promptly contacts electrode is surperficial to make Digestive system, thus more can promote and improve anaerobic digestion efficiency; In whole digester, the area control of electrode is in certain limit, and with erect form arrangement, does not hinder the inner stirring of Digestive system of digester and the discharge of biogas.
Accompanying drawing explanation
Fig. 1 is the structural representation of organic waste treatment device described in the utility model;
Fig. 2 is the structural representation of anaerobic digester described in the utility model;
1, oxidizing electrode; 2, barrier film; 3, reducing electrode; 4, electric current channelizing line; 5, adjustable DC power supply; 6, organic waste treatment device; 7, discharge port; 8, venting port; 9, feeding mouth; 10, whipping appts;
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment
A kind of organic waste treatment device 6, see Fig. 1, comprise adjustable DC power supply 5, one group of oxidizing electrode 1 and reducing electrode 3, and the barrier film 2 be located between oxidizing electrode 1 and reducing electrode 3, oxidizing electrode 1, reducing electrode 3 is connected with adjustable DC power supply 5 respectively, oxidizing electrode 1, reducing electrode 3 is battery lead plate, oxidizing electrode 1 contacts with the parallel contraposition of the one side of barrier film 2, reducing electrode 3 contacts with the parallel contraposition of the another side of barrier film 2, barrier film 2 is water-permeable or porous separatory membrane, oxidizing electrode 1 and reducing electrode 3 comprise carbon fibre fabric matrix, it leaves pre-and post perforative hole, in order to improve the electric conductivity of matrix, microorganism is affine methanogenic catalytic, anaerobic reaction is applicable to reach, the mixing solutions that matrix is put into containing carbon nanotube and nickel compound is made one deck carbon nanotube and nickel compound coating by electrophoretic deposition at the surface uniform of matrix.
Further, because oxidizing electrode 1 and reducing electrode 3 have large surface area, more even in order to make electric current and voltage distribute on oxidizing electrode 1 and reducing electrode 3, be interspersed with equally distributed electric current channelizing line 4 in the inside of oxidizing electrode 1 and reducing electrode 3.The material of preferred corrosion-resistant, the good conductivity of electric current channelizing line 4, as Stainless Steel Wire, titanium silk etc.
A kind of anaerobic digester being provided with above-mentioned organic waste treatment device 6, participate in Fig. 2, digester is round shape, comprise the feeding mouth 9 of bottom sides and the discharge port 7 of top-side, venting port 8, and the whipping appts 10 in the middle part of digester, organic waste treatment device 6 is provided with five, i.e. five groups of battery lead plates, be fixed in digester by support, the each group of rounded arrangement of electrode is evenly distributed on around whipping appts 10, and the setting area of every cubic metre of digester internal oxidition electrode 1 and reducing electrode 3 is 1 ~ 20 square metre, each group of electrode erect form is evenly distributed, the spacing of each group of electrode is 1 ~ 30cm.
Five groups of battery lead plates are submerged in the Digestive system in digester completely, and connect upper adjustable DC power supply 5, voltage difference between controlled oxidization electrode 1 and reducing electrode 3 is 0.2 ~ 0.6V, and the temperature of anaerobic digester is maintained 35 DEG C, in general, there is provided the temperature of 35 DEG C just can reach optimal effectiveness to this digester, but do not control also to affect it and substantially run.Anaerobism inoculum and organic waste are injected anaerobic digester according to a certain percentage, because microorganism needs the microorganism growing into applicable electrochemical properties, needs one to two months during running in the early stage.After anaerobic digester reaches steady state, the reaction at oxidizing electrode 1 and reducing electrode 3 place is as follows:
Oxidizing reaction: organism+H
2 o=e
- + H
+ + CO
2
Reduction reaction: 2e
- + 2H
+ + CO
2 =CH
4 + H
2 o
Be attached to living microorganism on oxidizing electrode 1 and decompose organism in Digestive system, discharge hydrogen ion, carbonic acid gas and electronics, electronics flows to reducing electrode 3 by voltage difference, and and hydrogen ion be combined with carbonic acid gas and generate methane.
The utility model digester has different hydraulic detention times (Hydraulicretentiontime, HRT) for different organism, and if sewage sludge is 5 ~ 30, food refuse is 1 ~ 5.The HRT of traditional anaerobic digestion is 20 ~ 50.While hydraulic detention time reduces, the clearance rate of volatile solid (volatilesolid, VS) reduces, if so organic waste is difficult decomposed substance, or want the clearance rate improving volatile solid, can extend hydraulic detention time is 30 ~ 50.
The digestive efficiency of the utility model digester water conservancy residence time different from common digester is with reference to table 1.
Table 1
Methane production and content are all beyond the numerical value of general anaerobic reaction as can be seen from Table 1, and volatile solid at water conservancy shorter residence time to being also above general anaerobic reaction when 5 days, it can be confirmed and utilize the utility model can increase the organic speed of process, or the volume reducing anaerobic digester is to reduce Meteorological.
For general anaerobic digester, be divided into mesophilic digestion (35 DEG C) and thermophilic digestion (55 DEG C), temperature variation can affect its digestibility and gas production rate.In actually operating, anaerobic digester can be subject to the impact of temperature variation throughout the year, and therefore anaerobic digester can not use in the winter time substantially.Table 2 is the middle gentle normal temperature experimental data contrast of the utility model digester,
Table 2
Therefrom can find out, although the efficiency of normal temperature digestion reduces about 15%, but more high than general anaerobic digestion efficiency, save the input of heating aspect simultaneously.
The utility model does not need to increase unnecessary quantities at existing anaerobic digester, only need arrange simply in anaerobic digester and organize redox electrode more, the high density methane reaching optimum digestive efficiency and can directly use.Further, the utility model, to being subject to the restricted less of temperature, although digestive efficiency can reduce with the reduction of temperature, not affecting the operation that it is basic, reduces infusion of financial resources with this.
Claims (6)
1. an organic waste treatment device, comprise adjustable DC power supply (5), one group of oxidizing electrode (1) and reducing electrode (3), and the barrier film (2) be located between described oxidizing electrode (1) and reducing electrode (3), described oxidizing electrode (1), reducing electrode (3) is connected with described adjustable DC power supply (5) respectively, it is characterized in that: described oxidizing electrode (1), reducing electrode (3) is battery lead plate, described oxidizing electrode (1) contacts with the parallel contraposition of one side of described barrier film (2), described reducing electrode (3) contacts with the parallel contraposition of another side of described barrier film (2), described barrier film (2) is water-permeable or porous separatory membrane, described oxidizing electrode (1) and reducing electrode (3) comprise matrix and are positioned at the homogeneous coating on its surface, described matrix is carbon fibre fabric, graphite, one in carbon nanotube, described coating is carbon nanotube or nickel compound.
2. a kind of organic waste treatment device according to claim 1, it is characterized in that described oxidizing electrode (1) and reducing electrode (3) are provided with equally distributed electric current channelizing line (4), electric current can be made to be evenly distributed on described oxidizing electrode (1) and reducing electrode (3).
3. a kind of organic waste treatment device according to claim 2, is characterized in that described electric current channelizing line (4) is for Stainless Steel Wire or titanium silk.
4. one kind is provided with the anaerobic digester of organic waste treatment device as claimed in claim 1, comprise feeding mouth (9), discharge port (7) and venting port (8), it is characterized in that, described organic waste treatment device is provided with multiple, and the setting area of every cubic metre of digester internal oxidition electrode (1) and reducing electrode (3) is 1 ~ 20 square metre, each group of electrode erect form is evenly distributed, and the spacing of each group electrode is 1 ~ 30cm.
5. a kind of anaerobic digester according to claim 4, is characterized in that being provided with whipping appts (10) in described digester.
6. a kind of anaerobic digester according to claim 5, it is characterized in that described digester is round shape, described whipping appts (10) is positioned at the middle part of described round shape digester, and the rounded arrangement of each group electrode is evenly distributed on described whipping appts (10) around.
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| CN201520335588.6U CN204779029U (en) | 2015-05-22 | 2015-05-22 | Organic waste processing apparatus and be equipped with device's anaerobic tank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611454A (en) * | 2017-10-19 | 2018-01-19 | 太原理工大学 | A kind of preparation method and application of microorganism electrolysis cell cathode material |
| CN107954572A (en) * | 2017-11-24 | 2018-04-24 | 哈尔滨工业大学 | A kind of microorganism electrochemical water treatment system for effectively integrating membrane treatment process |
| CN110819844A (en) * | 2019-11-19 | 2020-02-21 | 刘海涛 | Aluminum alloy door frame manufacturing device based on electrode reaction principle |
| CN115583718A (en) * | 2022-09-07 | 2023-01-10 | 齐鲁工业大学 | Bioelectrochemical reactor and method for treating wastewater by same |
-
2015
- 2015-05-22 CN CN201520335588.6U patent/CN204779029U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611454A (en) * | 2017-10-19 | 2018-01-19 | 太原理工大学 | A kind of preparation method and application of microorganism electrolysis cell cathode material |
| CN107954572A (en) * | 2017-11-24 | 2018-04-24 | 哈尔滨工业大学 | A kind of microorganism electrochemical water treatment system for effectively integrating membrane treatment process |
| CN110819844A (en) * | 2019-11-19 | 2020-02-21 | 刘海涛 | Aluminum alloy door frame manufacturing device based on electrode reaction principle |
| CN115583718A (en) * | 2022-09-07 | 2023-01-10 | 齐鲁工业大学 | Bioelectrochemical reactor and method for treating wastewater by same |
| CN115583718B (en) * | 2022-09-07 | 2023-12-29 | 齐鲁工业大学 | Bioelectrochemical reactor and method for treating wastewater by same |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |