CN104326636B - A kind of oxidation-reduction potential that can control promotes the device and method of mud dry anaerobic fermentation - Google Patents
A kind of oxidation-reduction potential that can control promotes the device and method of mud dry anaerobic fermentation Download PDFInfo
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- CN104326636B CN104326636B CN201410484380.0A CN201410484380A CN104326636B CN 104326636 B CN104326636 B CN 104326636B CN 201410484380 A CN201410484380 A CN 201410484380A CN 104326636 B CN104326636 B CN 104326636B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F11/00—Treatment of sludge; Devices therefor
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Abstract
The present invention relates to a kind of oxidation-reduction potential that can control to promote the device of mud dry anaerobic fermentation, the device of present invention design can control oxidation-reduction potential to promote mud dry anaerobic fermentation, main by fermentation tank, agitator, motor, anode, negative electrode, low-voltage dc power supply, wire, carbon fibre conductive material forms, it is characterized in that agitator is positioned horizontally in fermentation tank axle center, anode and the socket of axle center puddler, negative electrode is positioned at fermentor walls, carbon fibre conductive material is layed in fermentation tank inwall, low-voltage dc power supply is arranged on outside fermentation tank, by two electric wire jointed anodes and negative electrode.In order to improve the methane production of mud dry anaerobic fermentation, the present invention utilizes additional DC source to make the oxidation reduction potential control of fermentation tank inwall at 400mv by carbon fibre conductive material, the redox environment of the most suitable growth is provided for methanogen, reaches methanogen enrichment and the purpose of methane production raising.The mud solid content of the dry method fermentation that the present invention relates to is 10 ~ 20%.
Description
Technical field
The invention belongs to solid wastes recycling field, oxidation-reduction potential can be controlled particularly to one and promote the methanogenic device and method of mud dry anaerobic fermentation.
Background technology
Environment and energy problem have become the significant problem affecting human social at present; and anaerobic digestion techniques has prominent advantage in production of energy and environmental conservation; utilize sludge anaerobic fermentation to reclaim biomass energy and meet the route of sustainable development, fully demonstrate the minimizing of fixed-end forces, the innoxious and target of resource.Anaerobic digestion according to the difference of handled material solid content be divided into wet type/low containing solid digestion (<10%) and dry type/height containing admittedly digesting (>10%), compared with traditional wet digestion process, dry method digestion process has the potential advantages such as load is high, unit volume production capacity is big, heating and thermal insulation energy consumption is low, subsequent treatment expense is low.
nullAt present，Height is focused mostly in preconditioning technique containing the research of solid anaerobic sludge digestion，And the suitable growing environment of methanogen has important impact for improving anaerobic digestion efficiency and methane production，The outstanding feature of anaerobic environment is that biogas fermentative liquid has low oxidation-reduction potential，Anaerobic digestion is extremely complex bioprocess，The suitableeest oxidation-reduction potential needed for the metabolic process of different microorganisms is different，For methanogen，The suitableeest oxidation-reduction potential is-400mv，The present invention is directed to high containing solid mud，Positive and negative electrode it is respectively mounted at the axle center of anaerobic fermentation tank and in fermentor walls，One layer of carbon fibre conductive material is laid at fermentation tank inwall，Fermentation tank inwall institute is made with voltage to control at-400mv by impressed DC voltage，Reach methanogen is enriched to the suitableeest growing environment and then improves the purpose of methane production.Have no both at home and abroad at present and utilize DC voltage directly to control the high oxidation-reduction potential containing solid anaerobic digestion to improve the report of methane production.
Summary of the invention
It is an object of the invention to utilize DC voltage control height containing solid anaerobic sludge digestion reactor wall oxidation-reduction potential, there is provided the suitableeest growth conditions for methanogen, make methane production reach to maximize and a kind of device and method improving mud dry method anaerobic digestion methane production by controlling oxidation-reduction potential of providing.
In order to realize the technical purpose of the present invention, technical scheme is as follows.
A kind of oxidation-reduction potential that can control promotes the device of mud dry anaerobic fermentation, by fermentation tank, agitator, motor, anode, negative electrode, low-voltage dc power supply, wire and conductive material composition, wherein: fermentation tank is provided with rotating shaft at axle center, agitator is positioned horizontally in rotating shaft, the two ends of rotating shaft are stretched out outside fermentation tank, described rotating shaft one end is socketed with anode, and anode material stretches in fermentation tank, the end of rotating shaft connects variator by shaft coupling, variator connects motor, the tank skin of fermentation tank is provided with negative electrode, conductive material is layed on the inwall of fermentation tank, low-voltage dc power supply is arranged at outside fermentation tank, by two wires jointed anode and negative electrode respectively；Fermentation tank connects attemperating unit, and the tank skin top of fermentation tank is provided with gas sample mouth, charging aperture, observation panel and hot water outlet, and bottom is provided with discharging opening, hot water inlet.
In the present invention, described male or female uses columnar electrode.Described anode is interpreted as the anode that in prior art, any inert material prepares, include but not limited to graphite, platinum or metal oxide containing precious metals in the present invention, described negative electrode is interpreted as the negative electrode that in prior art, any conductive material prepares, and includes but not limited to copper, rustless steel, aluminum or titanium in the present invention.
In the present invention, described conductive material is carbon fibre conductive material, and described cathode voltage controls at-400mv.
In the present invention, described agitator uses double-deck helical-ribbon type alr mode.
What the present invention proposed can control the method that oxidation-reduction potential promotes the device of mud dry anaerobic fermentation to use, and described method is that the device utilizing and controlling oxidation-reduction potential promotion mud dry anaerobic fermentation improves height containing the solid sludge anaerobic methanogenic method of fermentation.Specifically comprise the following steps that
(1) seed sludge and dewatered sludge are added to fermentation tank, than according to ruuning situation, inoculation is set as that dewatered sludge and the mass ratio of seed sludge are 1:2-1:4, the time of staying set, as 20 days, controls the quality of input and output material every day, and i.e. the density of dewatered sludge is with 1.0 × 103kg/m3Calculate, the method for operation be every day input and output material each the most once, adjust discharging quality according to the tolerance produced, produce 1L gas consumption 1g volatile organic matter (the class material such as protein, polysaccharide), make solid content reach setting level；The solid content controlling dewatered sludge is 10 ~ 20%；
(2) low-voltage dc power supply is opened, regulation applied voltage, make fermentation tank inwall conductive material institute with voltage for-400mv, fermentation temperature maintains middle temperature (35-40 DEG C) or high temperature (50-60 DEG C) scope of setting, agitator speed is adjustable, generally 60r/min, and agitator " stirring/stop " time is adjustable, the ratio that sets, as 1:1, starts fermentation gas and detects gas production.
Present invention have the advantage that
1. the present invention uses the high mud admittedly that contains to carry out dry anaerobic fermentation, and it has, compared to wet-fermentation, the advantage that load is high, unit volume production capacity is big, heating and thermal insulation energy consumption is low.
2. the anode of the present invention and agitator socket are collectively disposed at the shaft core position of fermentation tank, reach the purpose in Appropriate application space, carbon fibre conductive material is utilized to be laid on whole fermentation tank inwall, expanding the suitable growth region of methanogen, the mechanical agitation needed for simultaneously alleviating because of mixed material to the full extent is on methanogen Biomass and the impact of activity.
3. the present invention utilizes additional low-voltage dc power supply to produce oxidation-reduction potential by anode, negative electrode and carbon fibre conductive material, it is characterized in that electromotive force is reduced to fermentation tank inwall successively by the shaft core position of fermentation tank, reach the biophasic purpose efficiently separating in anaerobic fermentation process, with two-part anaerobic fermentation methanogenic phase ratio, this device has simple in construction, the convenient advantage of operational management, has facilitation to methanogen growth enrichment under the oxidation-reduction potential environment that it is the suitableeest and methane production.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the device A-A sectional schematic diagram of the embodiment of the present invention 1.
Wherein, 1-low-tension supply, 2-anode, 3-negative electrode, 4-carbon fibre conductive material, 5-charging aperture, 6-gas sample mouth, 7-bilayer helix(ribbon type) agitator, 8-observation panel, 9-fermentation tank, 10-shaft coupling, 11-variator, 12-motor, 13-rotating shaft, 14-hot water inlet, 15-hot water outlet, 16-attemperating unit, 17-hot water interlayer, 18-discharging opening.
Detailed description of the invention
Further illustrate the present invention below by embodiment, but protection scope of the present invention is not limited to described content.
Embodiment 1:
nullAs depicted in figs. 1 and 2，Described device is by fermentation tank 9、Agitator、Motor 12、Anode 2、Negative electrode 3、Low-voltage dc power supply 1、Wire and conductive material composition，Wherein: agitator uses double-deck helix(ribbon type) agitator 7，Conductive material 4 uses carbon fibre conductive material，Fermentation tank 9 is cylindrical structure，Rotating shaft 13 it is provided with at its axle center，Double-deck helix(ribbon type) agitator 7 is positioned horizontally in rotating shaft 13，The two ends of rotating shaft 13 are stretched out outside fermentation tank 9，Described rotating shaft 13 one end is socketed with anode 2，Anode stretches in fermentation tank 9，The end of rotating shaft 13 connects variator 11 by shaft coupling 10，Variator 11 connects motor 12，The tank skin of fermentation tank 9 is provided with negative electrode 3，Carbon fibre conductive material 4 is layed on the inwall of fermentation tank 4，Low-voltage dc power supply 1 is arranged at outside fermentation tank 9，By two wires jointed anode 2 and negative electrode 3 respectively；Fermentation tank 9 connects attemperating unit 16, and fermentation tank 9 is externally provided with hot water interlayer 17, and the tank skin top of fermentation tank 9 is provided with gas sample mouth 6, charging aperture 5, observation panel 8 and hot water outlet 15, and bottom is provided with discharging opening 18, hot water inlet 14.
6kg seed sludge and 3kg dewatered sludge is added in the fermentation tank of 9L, by every day input and output material each the most once in the way of run, SRT is set as 20 days, the reactor start-up stage, in reactor, every day feeds 450g dewatered sludge (solid content is generally 20%), adjust discharging quality (general generation 1L gas consumption 1g is organic) according to the tolerance produced simultaneously, when in reactor, the solid content of Digestive system reaches setting level, charging is then added tap water mixing to the level feeding solid content 10% by dewatered sludge.The rotating speed of the double-deck helix(ribbon type) agitator of regulation is 60r/min, to rotate/to stop as 10min/10min mode alternate run, is 35 DEG C by temperature of charge in hot water program-controlled heating control fermentation tank in water-bath chuck, uses wet gas flow meter to measure daily output tolerance.With graphite as anode, copper is negative electrode, in anaerobic digestion process, open low-voltage dc power supply, make fermentation tank inwall by-400mv voltage on carbon fibre conductive material bands by regulation power supply, there is provided the redox environment of a suitable growth for methanogen, every day collects biogas by air vent and detects gas production.
Simultaneously, compare being not added with the simple anaerobic digestion of electrode and voltage, other condition keeps certain, measure daily output tolerance, result shows, additional low-voltage dc power supply is when ensureing the redox environment condition of wall voltage position-400mv, i.e. methanogen the most suitable growth in fermentation tank, methane production improves 5%, promotes marsh gas fermentation processes.
Embodiment 2:
Use device described in embodiment 1, improve the solid content of material in reactor further.First in fermentation tank, add 6.0kg seed sludge and 3kg dewatered sludge, by every day input and output material each the most once in the way of run, SRT is set as 20 days, the reactor start-up stage, in reactor, every day feeds 450g dewatered sludge (solid content is generally 20%), adjust discharging quality (general generation 1L gas consumption 1g is organic) according to the tolerance produced simultaneously, and step up organic loading, when in reactor, the solid content of Digestive system reaches setting level, it is the level of 20% that charging then add tap water to be adjusted charging solid content by dewatered sludge.The rotating speed of the double-deck helix(ribbon type) agitator of regulation is 60r/min, to rotate/to stop as 10min/10min mode alternate run, is 55 DEG C by temperature of charge in hot water program-controlled heating control fermentation tank in water-bath chuck, uses wet gas flow meter to measure daily output tolerance.With graphite as anode, copper is negative electrode, in anaerobic digestion process, open low-voltage dc power supply, make fermentation tank inwall by-400mv voltage on carbon fibre conductive material bands by regulation power supply, there is provided the redox environment of a suitable growth for methanogen, every day collects biogas by air vent and detects gas production.
Simultaneously, compare being not added with the simple anaerobic digestion of electrode and voltage, other condition keeps certain, measure daily output tolerance, result shows, additional low-voltage dc power supply is when ensureing the redox environment condition of wall voltage position-400mv, i.e. methanogen the most suitable growth in fermentation tank, methane production improves 10%, promotes marsh gas fermentation processes.
The oxidation-reduction potential of reaction, under different solid content levels, is controlled, can more promote the increase of the quantity of methanogen in the of a relatively high system of solid content, can more effectively improve system methane production by above-mentioned two embodiment explanations.
Claims (5)
- null1. the device that can control oxidation-reduction potential promotion mud dry anaerobic fermentation，By fermentation tank、Agitator、Motor、Anode、Negative electrode、Low-voltage dc power supply、Wire and conductive material composition，It is characterized in that: described device is used for processing the dewatered sludge of solid content 10 ~ 20%，Fermentation tank is provided with rotating shaft at axle center，Agitator is positioned horizontally in rotating shaft，The two ends of rotating shaft are stretched out outside fermentation tank，Described rotating shaft one end is socketed with anode，And anode material stretches in fermentation tank，Make agitator and anode socket，And it is collectively disposed at the shaft core position of fermentation tank，The end of rotating shaft connects variator by shaft coupling，Variator connects motor，The tank skin of fermentation tank is provided with negative electrode，Conductive material is layed on the inwall of fermentation tank，Low-voltage dc power supply is arranged at outside fermentation tank，By two wires jointed anode and negative electrode respectively；Fermentation tank connects attemperating unit, and the tank skin top of fermentation tank is provided with gas sample mouth, charging aperture, observation panel and hot water outlet, and bottom is provided with discharging opening, hot water inlet；Described agitator uses double-deck helical-ribbon type alr mode, utilize low-voltage dc power supply to pass through anode, negative electrode and conductive material and produce oxidation-reduction potential, electromotive force is made to be reduced successively to fermentation tank inwall by the shaft core position of fermentation tank, reach to separate the biophasic purpose in anaerobic fermentation process, control conductive material voltage at-400mV；Described conductive material uses carbon fibre conductive material.
- The oxidation-reduction potential that can control the most according to claim 1 promotes the device of mud dry anaerobic fermentation, it is characterised in that described male or female uses columnar electrode.
- The oxidation-reduction potential that can control the most according to claim 1 promotes the device of mud dry anaerobic fermentation, it is characterised in that described anode is any one in graphite, platinum or metal oxide containing precious metals.
- The oxidation-reduction potential that can control the most according to claim 1 promotes the device of mud dry anaerobic fermentation, it is characterised in that described negative electrode is any one in copper, rustless steel, aluminum or titanium.
- 5. the method that the device that can control oxidation-reduction potential promotion mud dry anaerobic fermentation as claimed in claim 1 uses, it is characterised in that comprise the following steps:(1) seed sludge and dewatered sludge are added to fermentation tank, than according to ruuning situation, inoculation is set as that dewatered sludge and the mass ratio of seed sludge are 1:2-1:4, the time of staying set, as 20 days, controls the quality of input and output material every day, and i.e. the density of dewatered sludge is with 1.0 × 103kg/m3Calculate, the method for operation be every day input and output material each the most once, adjust discharging quality according to the tolerance produced, produce 1L gas consumption 1g volatile organic matter, make the solid content of Digestive system in fermentation tank reach setting level；The solid content controlling charging dewatered sludge is 10 ~ 20%；(2) low-voltage dc power supply is opened, regulation applied voltage, make fermentation tank inwall carbon fibre conductive material institute with voltage for-400mv, fermentation temperature maintains middle temperature 35-40 DEG C or high temperature 50-60 DEG C of setting, agitator speed is 60r/min, agitator " stirring/stop " time is adjustable, and the ratio that sets, as 1:1, starts fermentation gas and detects gas production.
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| EP4170011A4 (en) * | 2020-06-23 | 2023-12-27 | Panasonic Intellectual Property Management Co., Ltd. | Method for oxidizing or reducing target molecule and device for oxidation or reduction of target molecule |
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| CN105417912B (en) * | 2015-12-10 | 2018-07-27 | 清华大学深圳研究生院 | A kind of device of dewatered sludge anaerobic dry fermentation |
| CN105664277B (en) * | 2016-02-25 | 2019-01-15 | 卢新明 | Intelligent blood dialysis apparatus |
| CN110819528A (en) * | 2019-12-16 | 2020-02-21 | 中国科学院大学 | Methane generating device and method for biological methane fermentation tank |
| CN112170446A (en) * | 2020-09-08 | 2021-01-05 | 江苏科技大学 | Microelectric auxiliary anaerobic digestion device for treating organic solid waste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8304355D0 (en) * | 1983-08-10 | 1983-08-10 | Sca Development Ab | SET TO CONTROL AN ANAEROBIC CLEANING PROCESS SET TO CONTROL AN ANAEROBIC CLEANING PROCESS |
| CN101376896A (en) * | 2008-07-21 | 2009-03-04 | 胜利油田胜利动力机械集团有限公司3705010003197 | Dry type fermentation process and apparatus |
| CN101921049A (en) * | 2010-09-21 | 2010-12-22 | 同济大学 | Method and device for producing methane by using dry anaerobic digestion for urban sludge and organic matter |
| CN104003594A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Method for increasing rate of sludge biological stabilization in sewage plant |
-
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- 2014-09-22 CN CN201410484380.0A patent/CN104326636B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8304355D0 (en) * | 1983-08-10 | 1983-08-10 | Sca Development Ab | SET TO CONTROL AN ANAEROBIC CLEANING PROCESS SET TO CONTROL AN ANAEROBIC CLEANING PROCESS |
| CN101376896A (en) * | 2008-07-21 | 2009-03-04 | 胜利油田胜利动力机械集团有限公司3705010003197 | Dry type fermentation process and apparatus |
| CN101921049A (en) * | 2010-09-21 | 2010-12-22 | 同济大学 | Method and device for producing methane by using dry anaerobic digestion for urban sludge and organic matter |
| CN104003594A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Method for increasing rate of sludge biological stabilization in sewage plant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4170011A4 (en) * | 2020-06-23 | 2023-12-27 | Panasonic Intellectual Property Management Co., Ltd. | Method for oxidizing or reducing target molecule and device for oxidation or reduction of target molecule |
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