CN104176836B - The microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud and the method for in-situ immobilization polluted-water and bed mud - Google Patents
The microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud and the method for in-situ immobilization polluted-water and bed mud Download PDFInfo
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Abstract
The microorganism electrochemical device of in-situ immobilization polluted-water and bed mud and a method for in-situ immobilization polluted-water and bed mud, it relates to a kind of method of microorganism electrochemical device and in-situ immobilization polluted-water and bed mud.The object of the invention is to solve existing biofuel cell reparation river course and lake pollution water body and bed mud loaded down with trivial details, the problem that cost is high and maintenance cost is high.Device comprises negative electrode, anode, the first wire, the second wire, charge and discharge device.Method: the anode of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode is placed in contaminated sediments upper strata polluted-water, the first wire is used to be connected with positive pole with the negative pole of charge and discharge device respectively with anode by negative electrode with the second wire, working time is 18d, obtains removing the water body of pollutent and removing the bed mud of pollutent.The present invention can be used for in-situ immobilization polluted-water and bed mud.
Description
Technical field
The present invention relates to a kind of method of microorganism electrochemical device and in-situ immobilization polluted-water and bed mud.
Background technology
Contaminated settling can be kicked up again generation settling flux under hydrodynamic condition and bioturbation, and the pollution substance be adsorbed on suspended sediment is entered in aerobic environment will be discharged again by oxygen-free environment, causes secondary pollution to water surrounding.When upper strata water quality obviously improves, the pollutent in bed mud also can discharge to upper strata water body.Ash river is the one-level tributary of main stream of Songhua River right bank, Acheng District-enter preserved egg Jiangkou, long 61.25km, and water environmental function zone is IV class.Therefore, the repair for the polluted water bodies such as Ash river and bed mud is very urgent.
Microbiological fuel cell (MFC) is a kind of bioelectrochemical system chemical energy being converted into electric energy, mainly utilizes microbial decomposition biomass, and a kind of bioelectrochemical simultaneously obtaining electrogenesis learns a skill.The main operational principle of microbiological fuel cell is: in anaerobic environment, electrogenesis bacterium is decomposed organic, produces proton (H
+) and electronics (e
-), proton and electronics transmit respectively and arrive negative electrode and be combined with final electron acceptor(EA), form a complete circuit cycles, thus generation current, voltage, output rating.
Settling microbiological fuel cell (Sediment Microbial Fuel Cells, SMFs) is a kind of typical bioelectrochemical system, and this Technology application can be obtained electric energy in the abundant settling of organic matter.Its mechanism of action is: be positioned over by anode material in the settling of anaerobism, cathode material is arranged in the aerobic aqueous phase in upper strata, be connected with resistance by wire between negative electrode and anode, in settling, organism is deposited indigenous microorganism oxygenolysis in thing near positive column, the electron transmission produced is to anode, negative electrode is arrived again through external circuit, oxygen in cathodic area and transmit the proton come from positive column and is combined and generates water, thus the object realizing in removal settling recovered energy again while organic pollutant.At present, settling microbiological fuel cell is considered to two main Application Areass and is: the long term monitoring instrument of ocean or Inland Water provides lower powered power supply; Novel as one, efficient settling biology in situ recovery technique.For current small river and bottom mud in lake seriously polluted, needing badly can the sludge handling method of effective engineer applied on a large scale.At present, catalyzer is expensive, and electrode fabrication cost is high, and after expanding, under voltage and output rating, degradation factors limits the widespread use of microbiological fuel cell.SMFC as a kind of novel, efficient sludge handling method equally because its higher cost and maintenance cost make it be difficult to realize large-scale application.Therefore the present invention proposes a kind of low cost, and the high efficiency bioelectrochemical system being applied to river course and bottom mud in lake reparation, is applicable to engineer applied, popularization.
Summary of the invention
The object of the invention is to solve existing biofuel cell reparation river course and lake pollution water body and bed mud loaded down with trivial details, the problem that cost is high and maintenance cost is high, and the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud and the method for in-situ immobilization polluted-water and bed mud are provided.
A microorganism electrochemical device for in-situ immobilization polluted-water and bed mud, it comprises negative electrode, anode, the first wire, the second wire and charge and discharge device;
Described negative electrode is formed by rolling methods compacting by cathode catalysis layer and stainless (steel) wire; Anode is fitted in propping material surface by carbon cloth, re-uses titanium silk and carbon cloth and propping material are fixed, obtain titanium silk fix after propping material; Every two titanium silks fix after propping material carry out pressing at interval of 19cm ~ 21cm, obtained anode;
Described negative electrode is connected with the negative pole of charge and discharge device by the first wire, and anode is connected with the positive pole of charge and discharge device by the second wire.
Utilize the method steps of the microorganism electrochemical device in-situ immobilization polluted-water of a kind of in-situ immobilization polluted-water and bed mud and bed mud as follows:
The anode of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode is placed in contaminated sediments upper strata polluted-water, the first wire is used to be connected with positive pole with the negative pole of charge and discharge device respectively with anode by negative electrode with the second wire, working time is 18d, obtains removing the water body of pollutent and removing the bed mud of pollutent.
Principle of work of the present invention and advantage:
One, anode enrichment electrogenesis bacterium of the present invention mainly uses carbon cloth, without the need to catalyzer, overcomes membraneless microbiological fuel cell MFC electrode many uses high cost or the shortcoming to the risky catalyzer of environment;
Two, anode-supported material has three-dimensional arrangement, to bed mud, there is fixed action, make anode become 3 D stereo effect to sedimental repair by two-dimentional interface interaction simultaneously, overcome conventional anode only in the effective defect of certain level mask, the sphere of action of the increasing anode of high degree, and then improve the speed that pollutants in sediments is removed;
Three, the bioelectrochemical system that the present invention is applied to remedying sludge effectively can remove the organic carbon in Sediments, organic nitrogen and organic phosphor contaminant, and running chemical oxygen demand COD clearance in 20 days Sediments can reach more than 60%;
Four, the present invention can be widely used in contaminated lake, and the bed mud such as river channel, irrigation canals and ditches in town and country and farmland and the pollution of water body are removed, and Environmental Safety cost is low, safeguards simple;
Five, the charge and discharge device of the present invention's design, can realize Automated condtrol, the electric energy that bioelectrochemical system produces effectively is collected storage, is applied to Landscape Lighting;
Six, in settling, organism is deposited indigenous microorganism oxygenolysis in thing near positive column, the electron transmission produced is to anode, negative electrode is arrived again through external circuit, oxygen in cathodic area and transmit the proton come from positive column and is combined and generates water, thus the object realizing in removal settling recovered energy again while organic pollutant.
The present invention can be used for in-situ immobilization polluted-water and bed mud.
Accompanying drawing explanation
The structural representation of the microorganism electrochemical device that Fig. 1 is a kind of in-situ immobilization polluted-water described in embodiment one and bed mud;
Fig. 2 is the structural representation of negative electrode in Fig. 1, and in figure, A representative is suppressed by rolling methods;
Fig. 3 is the structural representation of Fig. 1 Anodic, and in figure, B representative is fitted, and in figure, pressing is carried out in C representative;
Fig. 4 is the voltage change curve figure utilizing the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud in-situ immobilization polluted-water and bed mud under external resistance 1000 Ω and 10 Ω;
Fig. 5 is COD content curve over time in water;
Fig. 6 is total phosphorus and solubility orthophosphoric acid salt curve over time in water, and in Fig. 6,1 is total phosphorus curve over time in water, and 2 is solubility orthophosphoric acid salt curve over time in water;
Fig. 7 is total nitrogen and ammonia nitrogen curve over time in water, and in Fig. 7,1 is total nitrogen curve over time, and 2 is ammonia nitrogen curve over time;
Fig. 8 is bed mud organic content histogram; In Fig. 8,1 is the TOC value of Song Hua River, Ash river, Harbin water inlet section contaminated sediments, and 2 is Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 36th day of the microorganism electrochemical device process using in-situ immobilization polluted-water and bed mud; 3 for using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 54th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 4 for using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 76th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 5 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 36th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 6 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 54th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 7 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 76th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud.
Embodiment
Embodiment one: composition graphs 1, present embodiment is the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud, and it comprises negative electrode 1, anode 2, first wire 3, second wire 4 and charge and discharge device 5;
Described negative electrode 1 is formed by rolling methods compacting by cathode catalysis layer 6 and stainless (steel) wire 7; Anode 2 be by carbon cloth 8 be fitted in propping material 9 surface, re-use titanium silk and carbon cloth 8 and propping material 9 fixed, obtain titanium silk fix after propping material 14; Every two titanium silks fix after propping material 14 carry out pressing at interval of 19cm ~ 21cm, obtained anode 2;
Described negative electrode 1 is connected with the negative pole of charge and discharge device 5 by the first wire 3, and anode 2 is connected with the positive pole of charge and discharge device 5 by the second wire 4.
The structural representation of the microorganism electrochemical device that Fig. 1 is a kind of in-situ immobilization polluted-water described in embodiment one and bed mud; In Fig. 1,1 is negative electrode, and 2 is anode, and 3 is the first wire, and 4 is the second wire, and 5 is circuit assembly;
Fig. 2 is the structural representation of negative electrode in Fig. 1, and in figure, A representative is suppressed by rolling methods; In Fig. 2,1 is negative electrode, and 6 is cathode catalysis layer, and 7 is stainless (steel) wire;
Fig. 3 is the structural representation of Fig. 1 Anodic, and in figure, B representative is fitted, and in figure, pressing is carried out in C representative; In Fig. 3,2 is anode, and 8 is carbon cloth, and 9 is propping material, 14 for titanium silk fix after propping material.
The principle of work of present embodiment and advantage:
One, present embodiment anode 2 enrichment electrogenesis bacterium mainly uses carbon cloth 8, without the need to catalyzer, overcomes membraneless microbiological fuel cell MFC electrode many uses high cost or the shortcoming to the risky catalyzer of environment;
Two, anode 2 propping material has three-dimensional arrangement, to bed mud, there is fixed action, make anode 2 become 3 D stereo effect to sedimental repair by two-dimentional interface interaction simultaneously, overcome conventional anode 2 only in the effective defect of certain level mask, the sphere of action of the increasing anode 2 of high degree, and then improve the speed that pollutants in sediments is removed;
Three, the bioelectrochemical system that present embodiment is applied to remedying sludge effectively can remove the organic carbon in Sediments, organic nitrogen and organic phosphor contaminant, and running chemical oxygen demand COD clearance in 20 days Sediments can reach more than 60%;
Four, present embodiment can be widely used in contaminated lake, and the bed mud such as river channel, irrigation canals and ditches in town and country and farmland and the pollution of water body are removed, and Environmental Safety cost is low, safeguards simple;
Five, the charge and discharge device of present embodiment design, can realize Automated condtrol, the electric energy that bioelectrochemical system produces effectively is collected storage, is applied to Landscape Lighting;
Six, in settling, organism is deposited indigenous microorganism oxygenolysis in thing near anode 2 district, the electron transmission produced is to anode 2, negative electrode 1 is arrived again through external circuit, oxygen in negative electrode 1 district and is combined generates water from the proton that anode 2 block transitive comes, thus realization object of recovered energy again while organic pollutant in removal settling.
Present embodiment can be used for in-situ immobilization polluted-water and bed mud.
Embodiment two: present embodiment and embodiment one difference are: described anode 2 is for cellular.Other steps are identical with embodiment one.
Embodiment three: one of present embodiment and embodiment one or two difference is: described rolling methods specifically completes according to the following steps: one, prepare tackiness agent: the ultrasonic 30min under power is the condition of 100W by polytetrafluoroethylsolution solution and graphitized carbon black, obtains tackiness agent; Wherein, described polytetrafluoroethylsolution solution concentration is 60%; The volume of described polytetrafluoroethylsolution solution and the mass ratio of graphitized carbon black are 1mL:9g;
Two, apply: tackiness agent is coated in cathode catalysis layer 6 on the surface, coating thickness is 0.4mm ~ 0.5mm, then is placed on the cathode catalysis layer after application of adhesive 6 by stainless (steel) wire 7, obtains negative electrode.Other steps are identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three difference is: the material of the first described wire 3 is titanium silk.Other steps are identical with embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four difference is: the material of the second described wire 4 is titanium silk.Other steps are identical with embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five difference is: the material of described propping material 9 is polyethylene.Other steps are identical with embodiment one to five.
Embodiment seven: present embodiment utilizes the method steps of the microorganism electrochemical device in-situ immobilization polluted-water of a kind of in-situ immobilization polluted-water and bed mud and bed mud as follows:
The anode 2 of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode 1 is placed in contaminated sediments upper strata polluted-water, the first wire 3 is used to be connected with positive pole with the negative pole of charge and discharge device 5 respectively with anode 2 by negative electrode 1 with the second wire 4, working time is 18d, obtains removing the water body of pollutent and removing the bed mud of pollutent.
The principle of work of present embodiment and advantage:
One, present embodiment anode 2 enrichment electrogenesis bacterium mainly uses carbon cloth 8, without the need to catalyzer, overcomes membraneless microbiological fuel cell MFC electrode many uses high cost or the shortcoming to the risky catalyzer of environment;
Two, anode 2 propping material has three-dimensional arrangement, to bed mud, there is fixed action, make anode 2 become 3 D stereo effect to sedimental repair by two-dimentional interface interaction simultaneously, overcome conventional anode 2 only in the effective defect of certain level mask, the sphere of action of the increasing anode 2 of high degree, and then improve the speed that pollutants in sediments is removed;
Three, the bioelectrochemical system that present embodiment is applied to remedying sludge effectively can remove the organic carbon in Sediments, organic nitrogen and organic phosphor contaminant, and running chemical oxygen demand COD clearance in 20 days Sediments can reach more than 60%;
Four, present embodiment can be widely used in contaminated lake, and the bed mud such as river channel, irrigation canals and ditches in town and country and farmland and the pollution of water body are removed, and Environmental Safety cost is low, safeguards simple;
Five, the Circuits System of present embodiment design, can realize Automated condtrol, the electric energy that bioelectrochemical system produces effectively is collected storage, is applied to Landscape Lighting;
Six, in settling, organism is deposited indigenous microorganism oxygenolysis in thing near anode 2 district, the electron transmission produced is to anode 2, negative electrode 1 is arrived again through external circuit, oxygen in negative electrode 1 district and is combined generates water from the proton that anode 2 block transitive comes, thus realization object of recovered energy again while organic pollutant in removal settling.
Present embodiment can be used for in-situ immobilization polluted-water and bed mud.
Embodiment eight: present embodiment and embodiment seven difference are: the pollutent in described polluted bed mud is the mixture of one or more in organic carbon, organonitrogen and organophosphorus.Other steps are identical with embodiment seven.
Adopt following verification experimental verification beneficial effect of the present invention:
Test one: utilize the method steps of the microorganism electrochemical device in-situ immobilization polluted-water of a kind of in-situ immobilization polluted-water and bed mud and bed mud as follows:
Get Song Hua River, Ash river, 150L Harbin water inlet section contaminated sediments and be placed in reactor, then add 200L water in reactor; Again the anode 2 of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode 1 is placed in contaminated sediments upper strata polluted-water, use the first wire 3 to be connected with positive pole with the negative pole of charge and discharge device 5 respectively with anode 2 by negative electrode 1 with the second wire 4, run reactor.
In test one when reactor start-up 0h ~ 210h, external resistance is 1000 Ω, uses universal meter to record average voltage in reactor and remains on about 575mV; When reactor runs 207h, external resistance 1000 Ω is replaced with 10 Ω, and the voltage in reactor obviously declines, and minimum voltage value is 176mV, and average voltage is 290mV; As shown in Figure 4, Fig. 4 is the voltage change curve figure utilizing the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud in-situ immobilization polluted-water and bed mud under external resistance 1000 Ω and 10 Ω; As can be seen from Figure 4, along with the increase of reactor working time, voltage has to be increased slowly; This is because the organic matter in the water inlet section contaminated sediments of Song Hua River, Ash river, Harbin and abundant microorganism cause having higher trigger voltage during reactor start-up, and when in contaminated sediments, organic content is higher, voltage raises to some extent; When utilize a kind of in-situ immobilization polluted-water and bed mud microorganism electrochemical device in-situ immobilization polluted-water and after bed mud for some time, the organic content in polluted water body and contaminated sediments declines, and voltage slowly declines; In this test, cathode area is 0.1m
2, the maximum power density that negative electrode obtains is 66.177mW/m
2.
Test two: utilize the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud specifically to complete according to the following steps pollutant removal test in water body:
Get Song Hua River, Ash river, 150L Harbin water inlet section contaminated sediments and be placed in reactor, then add 200L pure water in reactor; Again the anode 2 of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode 1 is placed in contaminated sediments upper strata polluted-water, the first wire 3 is used to be connected with positive pole with the negative pole of charge and discharge device 5 respectively with anode 2 by negative electrode 1 with the second wire 4, run reactor, after reactor start-up, start to carry out COD mensuration, being wherein one-period every 18 days, was the 4th cycle by the end of postrun 76th day; As can be seen from Figure 6, the COD of the water before first period treatment is 170mg/L, and through the process of one-period, water outlet COD is down to 30mg/L;
The microorganism electrochemical device investigating a kind of in-situ immobilization polluted-water and bed mud, to the removal effect of pollutent, added the sanitary sewage of chemical oxygen demand (COD) 300mg/L respectively, as shown in Fig. 5, Fig. 6 and Fig. 7 in the 19th day and 36 days that starts reactor; Fig. 5 is COD content curve over time in water; Fig. 6 is total phosphorus and solubility orthophosphoric acid salt curve over time in water, and in Fig. 6,1 is total phosphorus curve over time in water, and 2 is solubility orthophosphoric acid salt curve over time in water; Fig. 7 is total nitrogen and ammonia nitrogen curve over time in water, and in Fig. 7,1 is total nitrogen curve over time, and 2 is ammonia nitrogen curve over time;
As can be seen from Figure 5, after the process in four cycles, detect the water outlet after period 4 process, find that this test is better to COD removal effect in water, clearance can reach more than 90%; Detect total phosphorus and solubility orthophosphoric acid salt in the water outlet after period 4 process, as can be seen from Figure 6, this test is better to phosphorus ligands effect in water, and clearance can reach more than 80%; Add nitrogen in reactor after, as can be seen from Figure 7, nitrogen can be detected in for some time, and along with the increase in treatment time, after the 4th period treatment, in water outlet, ammonia nitrogen removal frank is close to 99%, water outlet nitrogen removal rate can reach more than 92%, and this test is desirable to the removal effect of nitrogen.
Detection experiment two utilizes the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud to the removal effect of total organic matter TOC in bed mud in water body, within the 36th day respectively after detection experiment two reactor start-up, the 54th day and the 76th day, tests organic TOC value in bed mud;
The microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is not utilized to the concrete operations of the removal effect of total organic matter TOC in bed mud in water body to be: to get Song Hua River, Ash river, 150L Harbin water inlet section contaminated sediments and be placed in reactor, then in reactor, add 200L pure water water; Detect the 36th day, organic TOC value in the 54th day and the 76th day bed mud; As shown in Figure 8, Fig. 8 is bed mud organic content histogram; In Fig. 8,1 is the TOC value of Song Hua River, Ash river, Harbin water inlet section contaminated sediments, and 2 is Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 36th day of the microorganism electrochemical device process using in-situ immobilization polluted-water and bed mud; 3 for using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 54th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 4 for using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 76th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 5 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 36th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 6 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 54th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud; 7 for not using Song Hua River, Ash river, the Harbin water inlet section contaminated sediments TOC value of the 76th day of the microorganism electrochemical device process of in-situ immobilization polluted-water and bed mud;
As shown in Figure 8, utilize the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud obvious to the removal effect of total organic matter TOC in bed mud in water body; Along with the increase in treatment time, in bed mud, organic content obviously declines, and do not utilize the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud to the DeGrain of total organic matter TOC in bed mud in water body, illustrate and utilize the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud to remove organic matter in bed mud, run after 20 days, the organic carbon clearance in bed mud can reach more than 60%.
Claims (8)
1. a microorganism electrochemical device for in-situ immobilization polluted-water and bed mud, is characterized in that it comprises negative electrode (1), anode (2), the first wire (3), the second wire (4) and charge and discharge device (5);
Described negative electrode (1) is formed by rolling methods compacting by cathode catalysis layer (6) and stainless (steel) wire (7); Anode (2) is fitted in propping material (9) surface by carbon cloth (8), re-use titanium silk carbon cloth (8) and propping material (9) are fixed, obtain titanium silk fix after propping material (14); Every two titanium silks fix after propping material (14) carry out pressing at interval of 19cm ~ 21cm, obtained anode (2);
Described negative electrode (1) is connected by the negative pole of the first wire (3) with charge and discharge device (5), and anode (2) is connected by the positive pole of the second wire (4) with charge and discharge device (5).
2. the microorganism electrochemical device of a kind of in-situ immobilization polluted-water according to claim 1 and bed mud, is characterized in that described anode (2) is for cellular.
3. the microorganism electrochemical device of a kind of in-situ immobilization polluted-water according to claim 1 and bed mud, it is characterized in that what described rolling methods specifically completed according to the following steps: one, prepare tackiness agent: the ultrasonic 30min under power is the condition of 100W by polytetrafluoroethylsolution solution and graphitized carbon black, obtains tackiness agent; Wherein, described polytetrafluoroethylsolution solution concentration is 60%; The volume of described polytetrafluoroethylsolution solution and the mass ratio of graphitized carbon black are 1mL:9g;
Two, apply: tackiness agent is coated in cathode catalysis layer (6) on the surface, coating thickness is 0.4mm ~ 0.5mm, again stainless (steel) wire (7) is placed on the cathode catalysis layer after application of adhesive (6), then carries out roll-in, obtain negative electrode.
4. the microorganism electrochemical device of a kind of in-situ immobilization polluted-water according to claim 1 and bed mud, is characterized in that the material of described the first wire (3) is titanium silk.
5. the microorganism electrochemical device of a kind of in-situ immobilization polluted-water according to claim 1 and bed mud, is characterized in that the material of described the second wire (4) is titanium silk.
6. the microorganism electrochemical device of a kind of in-situ immobilization polluted-water according to claim 1 and bed mud, is characterized in that the material of described propping material (9) is polyethylene.
7. utilize a kind of in-situ immobilization polluted-water described in claim 1 and the microorganism electrochemical device in-situ immobilization polluted-water of bed mud and the method for bed mud, it is characterized in that the method step is as follows:
The anode (2) of the microorganism electrochemical device of a kind of in-situ immobilization polluted-water and bed mud is placed in contaminated sediments, negative electrode (1) is placed in contaminated sediments upper strata polluted-water, the first wire (3) is used to be connected with positive pole with the negative pole of charge and discharge device (5) respectively with anode (2) by negative electrode (1) with the second wire (4), working time is 18d, obtains removing the water body of pollutent and removing the bed mud of pollutent.
8. according to claim 7ly utilize the microorganism electrochemical device in-situ immobilization polluted-water of a kind of in-situ immobilization polluted-water and bed mud and the method for bed mud, the pollutent that it is characterized in that in described polluted bed mud is the mixture of one or more in organic carbon, organonitrogen and organophosphorus.
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