CN109912083A - A kind of method of the electrochemistry detoxification and deep dehydration of cyanobacteria liquid - Google Patents

A kind of method of the electrochemistry detoxification and deep dehydration of cyanobacteria liquid Download PDF

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CN109912083A
CN109912083A CN201910162008.0A CN201910162008A CN109912083A CN 109912083 A CN109912083 A CN 109912083A CN 201910162008 A CN201910162008 A CN 201910162008A CN 109912083 A CN109912083 A CN 109912083A
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cyanobacteria
electrochemical reactor
dehydration
detoxification
electrochemistry
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CN109912083B (en
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李继洲
宋垠先
韩孟雨
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Hohai University HHU
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Abstract

The invention discloses the method for a kind of electrochemistry detoxification of cyanobacteria liquid and deep dehydration, include the following steps: that cyanobacteria liquid, which is put into primary sedimentation tank, carries out preliminary stratification, cyanobacteria liquid stream enters in electrochemical reactor;The tank voltage and agitator speed of electrochemical reactor are set, open electrochemical reactor and its agitating function, Cells of Blue-green Algae broken wall is dehydrated under the action of electric field and positive pole machinery stir, the algae toxin of the continuous oxidative degradation cyanobacteria release of the hydroxyl radical free radical generated in simultaneous electrochemical reactor completes broken wall dehydration and the During Detoxification of cyanobacteria;Cyanobacteria liquid stream enters high pressure filter-pressing device, carries out deep dehydration, finally obtains cyanobacteria mud cake.The method of the invention realizes the efficient degradations of the high-efficiency dehydration of cyanobacteria and algae toxin, method is simple, operation is controllable, efficiently solve the problems, such as algal toxin degradation, deep dehydration and the secondary pollution for inhibiting dehydration of blue algae resource process, and any chemical substance is not added, solid foundation has been established for the Deep of cyanobacteria.

Description

A kind of method of the electrochemistry detoxification and deep dehydration of cyanobacteria liquid
Technical field
The invention belongs to the innoxious of cyanobacteria, minimizing and resource technology fields, and in particular to a kind of electricity of cyanobacteria liquid The method of chemical detoxication and deep dehydration.
Background technique
River and lake eutrophication and alga eruption are the serious water environmental problems that China faces at present.For current richness The characteristics of nutritive water Blue-green Algae Fast Growth, various regions are all made of simple manually or mechanically operation ship and salvage cyanobacteria from water body Come.It salvages cyanobacteria and plays a significant role for reducing Blue-green Algae Population biomass, population advantage degree, inhibition Population breeding etc., simultaneously The a large amount of nitrogen of band water-outlet body, phosphorus nutrition, for mitigate locality disaster, reduce nutrition accumulation in lake, improve source quality and Ecological environment effect is very significant.Therefore, cyanobacteria machinery salvages the terminal control approach as wawter bloom, can reduce water pollution disaster Its one of the most direct, effective measures for breaking out intensity and possibility again with reduction, cause water dirty to blue algae bloom is solved The emergency processing of dye plays a significant role.But 98% is typically up to by the cyanobacteria moisture content that this simple fishing is salvaged More than even.
Cyanobacteria is a kind of prokaryotes, and including the nutrients such as a large amount of N, P and phycocyanin etc. can be using substance, can As a kind of biomass resource.However it is restricted by factors such as the present art and economic costs, the indigo plant that China's lake surface is salvaged Algae separates to form the relatively low algal biscuit of moisture content mostly through algae water, carries out burning after outward transport or simply fill, and carries out big Scale resource utilization.Cyanobacteria can be processed into feed, fertilizer or even health food etc. as a kind of living resources, but by Its recycling, therefore the removing of algae toxin are affected in the problems such as high-moisture percentage for salvaging cyanobacteria, cyanobacteria release algae toxin, is real The existing innoxious technical problem primarily solved of cyanobacteria, while to make blue algae resource, deep dehydration and minimizing are also must not The sport technique segment that can lack.
The dehydration of cyanobacteria and minimizing mode it is general there are three types of, i.e. filtering means dehydration, centrifugal dehydration and electroosmotic dewatering.Filtering Mainly there are several types of modes: 1. plate compression for dehydration, such as the invention of Publication No. CN105000779A and CN205590062A Patent;2. diaphragm filters pressing, such as the hair of utility model patent, Publication No. CN105693063A that grant number is CN205974054U Bright patent;3. film filters, the invention such as Publication No. CN106955596A " a kind of membrane filtration system that blue algae water separates " is special Benefit;4. and other filter types, if the patents such as Publication No. CN104959185A, CN105060674A, CN108444255A Report the method that several different fashion of extrusion are dehydrated cyanobacteria.It is of less demanding that centrifugal dewatering technology is mainly used for dehydration rate Occasion, such as the pre-dehydration of cyanobacteria, the cyanobacteria as Publication No. CN105000779A " a kind of blue-green algae treatment method " is reported is pre- The centrifuge of processing is dehydrated, as mentioned in Publication No. CN106495357A " a kind of algal tufa emergency salvage treatment process and equipment " And folded spiral shell machine dehydration.Electroosmotic dewatering mainly utilizes the electro-osmosis phenomenon generated under the action of electric field, by electrically charged Grain carries out de- steady, electrically charged for surface colloidal solid, and electroosmotic dewatering then has better effect than mechanical dehydration, such as open Number for CN106242652A " a kind of blue algae dewatering composting treatment method " patent of invention in, the deep dehydration of cyanobacteria then be The technology.
Dehydration is the first step realizing cyanobacteria and being separated by solid-liquid separation, but in the various dehydration techniques of current patent report, in order to Reach higher dehydration efficiency, is all added to the flocculants such as aluminium polychloride into cyanobacteria liquid mostly, contains in final cyanobacteria mud These flocculants, this recycling to cyanobacteria, especially producing various high value added products to cyanobacteria deep processing is then extremely not Benefit.
On the other hand, the cyanobacteria salvaged after being even dehydrated, is such as effectively disposed not in time and arbitrarily stacks, cyanobacteria A large amount of odor pollution surrounding enviroment can be discharged in decay process, it can also be due to rainfall generates rainwash or downward leaching again Polluted-water;More importantly the capsule algae toxin of cyanobacteria release may enter ground water regime by leaching, cause serious Secondary pollution.It is a kind of monocycle heptapeptide compound that Cells of Blue-green Algae, which releases algae toxin, is frequency of occurrences highest in cyanobacterial bloom, makes At a kind of natural toxin for endangering most serious, it can cause aquatic animal to be poisoned, and threaten the mankind strong by food chain Health.Studies have shown that water of the long-term drinking containing algae toxin can induced hepatocellular carcinoma and the carcinoma of the rectum, less serious case can make one to generate diarrhea and skin mistake The symptoms such as quick, algae toxin threaten oneself to cause the extensive concern of world wide scholar to human health.Therefore to realize the money of cyanobacteria Source, it is also necessary to solve the problems, such as algae toxin.According to the report of disclosed document and various patents, the removal of algae toxin mainly has Four kinds of methods, i.e. microbial degradation method, pyrolysismethod, absorption method and oxidizing process.
Microbial degradation method is exactly to cultivate algal toxin degradation bacterium, at suitable temperature and nutritional condition, passes through degradation bacteria Metabolism by algal toxin degradation.As " a kind of cyanobacteria and sludge hybrid anaerobic fermentation produce natural pond to Publication No. CN101418316A The patent of invention of gas ", by the hybrid anaerobic fermentation of cyanobacteria and sludge, algae toxin is from initial 244~366 μ g/kg, algae after processing Toxin residue is reduced to 5 μ g/kg.Publication No. CN10622206A's " cyanobacteria harmlessness disposing and recycling processing method " Patent of invention, by being inoculated with algae toxin high-efficiency degradation composite bacteria agent aerobic fermentation, anaerobic fermentation catalytic degradation and strong into material Change acidification three step microbials processing, algae toxin residual quantity is lower than 1 μ g/kg, the more conducively subsequent recycling of cyanobacteria.Authorization Notice No. For CN103667100B " a kind of molten algae/algal toxin degradation double engineering bacterium Y7 and its construction method " and publication number The patent of invention of CN103525746A " a kind of molten algae/algal toxin degradation double engineering bacterium Y1 and its construction method ", with plasm Based on body integration technology, prepare can molten algae but also the MC-LR that degrades double engineering bacterium, for improving protoplast fusion Technology building, the engineering bacteria and its practical application for integrating MC-LR degradation function and algae-lysing bacteria have directive significance.
Pyrolysismethod, i.e., at a certain temperature, the method that organic matter is thermally decomposed.Such as Publication No. CN102150747 The patent of invention of " processing method of cyanobacteria ", by blue algae dewatering and drying is to water content 20% hereinafter, hot at 150~300 DEG C 10~60min is handled, Cells of Blue-green Algae endotoxin LR therein can be down to 50 μ from 7600 μ g/kg relative to the content of over dry substance g/kg.The patent of invention of Publication No. CN105820829A " technique and device that cyanobacteria catalytic pyrolysis method produces bio-oil ", It is salvaged using solidifying algae, filter-press dehydration and the methods of broken obtains dry algae powder, under the effect of the catalyst, 463 DEG C of isothermal pyrolysis Biological liquefaction is made, but does not report the degradation rate of algae toxin.
Absorption method utilizes specific adsorbent, specific components certain in fluid are fixed on the sorbent, to realize A kind of method of separation.There is open report the adsorbent material of algae toxin removal ability there was only modified water chestnut disclosed in chapter cloud etc. at present Iron ore based composites (publication number CN105753091A), cordierite-acid fiber by polylactic composite material (publication number CN105776402A), modified zeolite-nano carbon composite material (publication number CN105776403A), the composite wood containing waste tobacco stem Expect (publication number CN105831173A), garlic stalk-nanometer carbon/carbon-copper composite material (publication number CN105858777A), attapulgite- Polypropylene fiber composite (publication number CN105858778A), using bagasse as raw material (publication number CN105858831A), with Diatomite be principal component have deodorization composite material (publication number CN105753090A) series using composite material as Adsorbent handles the patent of cyanobacteria, these composite materials not only have flocculating property, also have good adsorption activity, to cyanobacteria Removal speed it is fast, it is at low cost, it is without secondary pollution, also have higher removal rate to cyanophycean toxin, while also having both that kill algae antibacterial, The effect of improving water quality, persistent, the processing suitable for Complex Water Environment.With typical garlic stalk-nanometer carbon/carbon-copper composite material For, the removal rate to frustule, turbidity and algae toxin is respectively 98.54%, 96.11% and 72.34%.
Oxidizing process utilizes oxidant by the process of target contaminant oxygenolysis.At present in terms of algal toxin degradation Patent is also fewer, such as Publication No. CN104339315A " method a kind of while to cyanobacteria progress detoxification and dehydration ", first Cyanobacteria is adjusted to acid, oxidants hydrogen peroxide is then added, carries out microwave radiation at 110~130 DEG C of temperature, then Filter-press dehydration is carried out, the algae toxin content of dehydration cyanobacteria can be greatly reduced.A kind of Publication No. CN108569745A " cyanophycean toxin Processing unit and blue-green algae disposing device ", the device include reaction chamber and ozone generator, the reaction chamber be equipped with it is described The water inlet pipe and outlet pipe that reaction chamber communicates, the reaction chamber is interior to be equipped with ultraviolet radiator, and the ozone generator is equipped with For the ozone ingress pipe of delivery of ozone into the reaction chamber and the oxygen for conveying oxygen into the ozone generator Ingress pipe.This cyanophycean toxin processing unit is with ultraviolet radiator and ozone treatment cyanophycean toxin, and algae toxin is from 50 μ g/ in algae aqueous solution L is reduced to 10 μ g/L, and processing cost is low, processing water is big, and secondary pollution is small, and strong applicability, treatment effect is reliable and stable, fortune The characteristics of row maintenance is simple, technical maturity.Publication No. CN108751339A " a kind of blue-green algae treatment method ", the method is by adding Liquid containing cyanobacteria is sent into the first closed container by pressure, and by the liquid pressing to 0.2-10MPa;It directs the air into described Until uniformly mixing with the liquid in first closed container, and it is maintained at the pressure value in first closed container Between 0.1MPa-10MPa;Removing toxic substances step is to import at least one of A and B in the first closed container until with the liquid Uniformly mixing, the A include fungicide, antidote, deodorizer, pigment or distintegrant, the B include ozone, carbon dioxide, Oxygen or nitrogen, then import the second closed container for treatment liquid, set quartz burner irradiation in the container, at the same to its In be passed through ozone and aoxidized, algae toxin from 50 μ g/L is reduced to 10 μ g/L in algae aqueous solution after processing.
In conclusion to realize the recycling of cyanobacteria, innoxious and minimizing is indispensable, especially efficient degradation algae Toxin does not add the oxidation technology of residuals, and does not add the depth that the foreign substances such as flocculant are able to achieve cyanobacteria high-efficiency dehydration Spend processing technique, therefore the removing toxic substances of developing low-cost, green high-efficient and the joint processing technology of deep dehydration, be it is current realize cyanobacteria without Evilization, minimizing and recycling critical issue urgently to be resolved.
Summary of the invention
Goal of the invention: aiming at the existing problems and shortcomings of the prior art, the electrochemistry that the present invention provides a kind of cyanobacteria liquid is de- The method of poison and deep dehydration, by taking off cyanobacteria pre-dehydration, electrochemistry cyanobacteria broken wall and algal toxin degradation, high pressure filters pressing depth Water realizes the high-efficiency dehydration of cyanobacteria and the efficient degradation of algae toxin, and method is simple, and operation is controllable, efficiently solves blue algae resource Algal toxin degradation, deep dehydration and the secondary pollution problem for inhibiting dehydration of change process, and any chemical substance is not added, Solid foundation has been established for the Deep of cyanobacteria, there is significant environmental benefit and practical value.
Technical solution: to achieve the goals above, a kind of electrochemistry detoxification of cyanobacteria liquid and depth are de- as described herein The method of water, includes the following steps:
(1) the cyanobacteria liquid investment primary sedimentation tank after salvaging is subjected to preliminary stratification, the cyanobacteria liquid stream of lower layer enters band stirring Supernatant in the electrochemical reactor of function, after periodically taking cyanobacteria layering away;
(2) tank voltage and agitator speed of electrochemical reactor are set, electrochemical reactor and its agitating function are opened, It is dehydrated Cells of Blue-green Algae broken wall under electric field force and churned mechanically synergy, composition metal oxygen in simultaneous electrochemical reactor The algae toxin of the continuous oxidative degradation cyanobacteria release of the hydroxyl radical free radical that compound active coating titanium mesh plate anode generates, completes cyanobacteria Broken wall dehydration and During Detoxification;
(3) cyanobacteria liquid stream enters high pressure filter-pressing device in electrochemical reactor, carries out deep dehydration, finally obtains cyanobacteria mud Cake.
Wherein, it is 10- that the tank voltage of step (2) the setting electrochemical reactor and agitator speed, which are setting tank voltage, 30V, revolving speed are set in 50-200 and turn/min, time 0.5-1h.
Wherein, step (3) the high pressure filter-pressing device is autoclave diaphragm filter press, operating pressure 1.2-2Mpa, when dehydration Between 0.2-0.5h
Wherein, the primary sedimentation tank bottom is connect by inlet tube with electrochemical reactor, the setting of electrochemical reactor bottom There is drain pipe to connect with high pressure filter-pressing device.
Wherein, the electrochemical reactor is cylindrical metal cylinder, is provided with shaft in electrochemical reactor, in shaft Pass through shaft coupling outside end stretching electrochemical reactor to be fixedly connected with the output shaft of motor.
Wherein, the metal composite oxide active coating titanium mesh plate anode is upper and lower two groups mutually perpendicular alloy web plates And be fixedly connected in shaft, carry out anode Stirring.
Wherein, the metal composite oxide of the metal composite oxide active coating titanium mesh plate anode includes titanium dioxide Lead, ruthenium iridium composite oxide or iridium tantalum composite oxides etc..
Wherein, the metal composite oxide active coating titanium mesh plate anode passes through the electric slip ring that is set in shaft and electricity The anode for the DC power supply being arranged outside chemical reactor connects, the cathode terminal and power supply on electrochemical reactor metal cylinder Cathode connection.
Wherein, the aperture of the web plate of the metal composite oxide active coating titanium mesh plate anode is 1~5mm, compound gold The outer ledge for belonging to oxide active coating titanium mesh plate anode is 5~20mm at a distance from electrochemical reactor cylinder madial wall.
Wherein, the first valve and the second valve are respectively arranged on the inlet tube and drain pipe of the electrochemical reactor.
Working principle: the pretreatment of cyanobacteria is completed in primary sedimentation tank, will be salvaged cyanobacteria first and is poured into primary sedimentation tank, utilizes gravity Effect is layered cyanobacteria preliminary sedimentation in pond, opens the first valve of bottom of pond, and the cyanobacteria liquid of lower layer flows into band by inlet tube certainly Supernatant in the electrochemical reactor of agitating function, after periodically taking cyanobacteria layering away.Opening motor switch stirs shaft, Certain mixing speed is set, the shaft coupling of motor drives shaft and the web plate anode being fixed thereon to start turning;It opens Tank voltage 10-30V is arranged in the power supply being arranged outside electrochemical reactor, makes cyanobacteria under the action of electric field and positive pole machinery stir Breaking-wall cell, improves dehydrating effect, and simultaneous electrochemical reactor metal composite oxide active coating titanium mesh plate anode generates Hydroxyl radical free radical persistently to cyanobacteria release algae toxin carry out oxidative degradation, thus complete cyanobacteria broken wall dehydration and algae toxin Subtractive process.The second valve on electrochemical reactor bottom drain is opened, cyanobacteria liquid flows into high pressure pressure by drain pipe Device is filtered, carrying out high pressure filters pressing makes algae solution deep dehydration, finally obtains cyanobacteria mud cake.
The present invention, by the effect of extra electric field, it is existing to generate electro-osmosis on the basis of algae solution natural sedimentation preliminary hydro-extraction As that is, under the action of extra electric field, to movable cathode, negatively charged substance faces south Ghandler motion positively charged substance in mud It is dynamic, and charge neutrality occurs, keep charged particle de- steady, therefore the colloidal solid electrically charged for surface, mechanical dehydration effect is often Bad, electroosmotic dewatering then has better dehydrating effect.Simultaneously in extra electric field, titanium mesh plate anode generates Strong oxdiative after energization Property hydroxyl radical free radical and electric field force, positive pole machinery stirring multiple action under, make frustule broken wall, moisture intracellular is sufficiently released It releases, improves dehydration efficiency;Finally combine high pressure pressure filtering technique, more traditional filters pressing or folded spiral shell machine dehydration compare, it can be achieved that Higher dehydration efficiency.
On the other hand, the electrocatalytic oxidation effect of metal composite oxide active coated Ti is generated largely based on it The extremely strong substance of this oxidability of hydroxyl radical free radical makes organic pollutant oxidation to degradation.And having had not yet to see makes With the research report in terms of electro-catalytic oxidation technology degradation algae toxin, the detoxification dehydration for being applied to algae solution is more had no, therefore The present invention finally realizes cyanobacteria by cyanobacteria pre-dehydration, electrochemistry cyanobacteria broken wall and algal toxin degradation, high pressure filters pressing deep dehydration High-efficiency dehydration and algae toxin efficient degradation.
The utility model has the advantages that compared with prior art, the present invention has the advantage that
1, the connection that the method for the electrochemistry detoxification of cyanobacteria liquid of the present invention and deep dehydration is stirred using electric field and rotary anode Cooperation carries out broken wall with by Cells of Blue-green Algae, improves dehydrating effect;2, the device of the invention utilizes compound in electrochemical reactor The algae toxin that the hydroxyl radical free radical that metal oxide active coated anode generates discharges cyanobacteria aoxidizes, and degradation efficiency is high; 3, the deep dehydrator of cyanobacteria of the invention carries out the pre-dehydration before electrochemical treatments, reduces the energy consumption of subsequent process, mentions The high degradation efficiency of algae toxin;4, the deep dehydrator of cyanobacteria of the invention carries out cyanobacteria liquid using high pressure filters pressing mode Deep dehydration can further decrease the moisture content of algal gel;5, the present apparatus does not add any chemical substance into system, ensure that algae Original ingredient of mud, the more conducively Deep of cyanobacteria.
On the whole, the deep dehydrator of cyanobacteria of the invention is high-efficient to the broken wall of cyanobacteria, algal toxin degradation effect Good, algae moisture content of the cake is lower than 60% after ultimate depth dehydration, and whole process method is simple, and operation is controllable, efficiently solves indigo plant The secondary pollution problem of the algal toxin degradation of algae recycling process, deep dehydration and dehydration, and any chemicals are not added Matter is laid a good foundation for the Deep of cyanobacteria, has significant environmental benefit and practical value.
Detailed description of the invention
Fig. 1 is the electrochemistry detoxification and deep dehydration method schematic device of cyanobacteria of the present invention.
Wherein, 1- primary sedimentation tank, 2- electrochemical reactor, 3- high pressure filter-pressing device, 4- inlet tube, 5- drain pipe, 6- turn Axis, 7- shaft coupling, 8- motor, 9- metal composite oxide active coating titanium mesh plate anode, 10- electric slip ring, 11- cathode connection Column, 12- power supply, the first valve of 13-, 14 second valves.
Specific embodiment
Of the invention is described further below in conjunction with drawings and examples.
Embodiment
A kind of electrochemistry detoxification of cyanobacteria liquid and deep dehydration method, comprising the following steps: 1 throws the cyanobacteria liquid after salvaging Enter primary sedimentation tank and carry out preliminary stratification, open the first valve of primary sedimentation tank bottom of pond, the cyanobacteria liquid stream of lower layer enters with agitating function Supernatant in electrochemical reactor, after periodically taking cyanobacteria layering away;The tank voltage and blender of 2 setting electrochemical reactors turn Speed, tank voltage 10-30V, revolving speed are set in 50-200 and turn/min, time 0.5-1h;It opens electrochemical reactor and its stirs Function is mixed, is dehydrated Cells of Blue-green Algae broken wall under the synergy that electric field and positive pole machinery stir, in simultaneous electrochemical reactor The continuous oxidative degradation cyanobacteria release of the hydroxyl radical free radical that the anode of metal composite oxide active coating titanium mesh plate anode generates Algae toxin completes broken wall dehydration and the During Detoxification of cyanobacteria;Cyanobacteria liquid stream enters high pressure filter-pressing device in 3 electrochemical reactors, into Row deep dehydration finally obtains cyanobacteria mud cake.
As shown in Figure 1,1 bottom of primary sedimentation tank is connect by inlet tube 4 with 2 upper entrance of electrochemical reactor, electrochemistry is anti- It answers 2 bottom of device to be provided with drain pipe 5 to connect with the entrance of high pressure filter-pressing device 3.Electrochemical reactor 2 is cylindrical metal cylinder Body is provided with shaft 6 in electrochemical reactor 2, and 6 upper end of shaft, which is stretched out, passes through shaft coupling 7 and motor outside electrochemical reactor 2 8 output shaft is fixedly connected.Two groups of mutually perpendicular metal composite oxide active coating titaniums up and down are fixedly connected in shaft 6 Web plate anode 9, metal composite oxide active coating be ruthenium iridium composite oxide active coating, or be substituted for brown lead oxide or Iridium tantalum composite oxides etc.;Electric slip ring 10 of the metal composite oxide active coating titanium mesh plate anode 9 by being set in shaft 6 It is connect with the anode for the DC power supply 11 being arranged outside electrochemical reactor 2, the cathode connection on 2 metal cylinder of electrochemical reactor Column 12 is connect with the cathode of power supply 11.The aperture of the web plate of metal composite oxide active coating titanium mesh plate anode 9 is 1~5mm, The outer ledge of metal composite oxide active coating titanium mesh plate anode 9 is 5 at a distance from 2 cylinder madial wall of electrochemical reactor ~20mm.The first valve 13 and the second valve 14 are respectively arranged on the inlet tube 4 and drain pipe 5 of electrochemical reactor 2;It is high Pressure filter-pressing device 3 is autoclave diaphragm filter press, operating pressure 1.2-2Mpa, dewatering time 0.2-0.5h.
In use, the pretreatment of cyanobacteria is completed in primary sedimentation tank 1, cyanobacteria will be salvaged and poured into primary sedimentation tank 1, gravity is utilized Be layered cyanobacteria preliminary sedimentation in 1 pond of primary sedimentation tank, open 1 the first valve of bottom of pond 13 of primary sedimentation tank, the cyanobacteria liquid of lower layer by into Liquid pipe 4 periodically takes the supernatant after cyanobacteria is layered away, generally to supernatant from flowing into the electrochemical reactor 2 with agitating function Supernatant is taken away when liquid liquid level is apart from 10cm at the top of primary sedimentation tank or so.
The motor 8 for opening the shaft 6 of electrochemical reactor 2 switchs, and sets certain mixing speed, general revolving speed setting Turn/min in 50-200, motor 8 drives shaft 6 and the metal composite oxide activity being fixed thereon to apply by shaft coupling 7 Layer titanium mesh plate anode 9 starts turning;The power supply 11 of electrochemical reactor 2 is opened, tank voltage 10-30V is set, in electric field and sun The effect of extremely churned mechanically synergy makes Cells of Blue-green Algae broken wall, improves dehydrating effect, in simultaneous electrochemical reactor 2 The hydroxyl radical free radical that metal composite oxide active coating titanium mesh plate anode 9 generates persistently carries out oxygen to the algae toxin of cyanobacteria release Change degradation, to complete the subtractive process of the broken wall dehydration and algae toxin of cyanobacteria.Open 2 bottom drain 5 of electrochemical reactor The second valve 14, cyanobacteria liquid by drain pipe 5 flow into high pressure filter-pressing device 3, carry out high pressure filters pressing make algae solution deep dehydration, most Cyanobacteria mud cake is obtained eventually.
Untreated 8.216 μ gg of cyanobacteria butt algae toxin content after the present embodiment is salvaged-1, initial aqueous rate is 98- 99%, it is handled with device provided in this embodiment, fixed 120 turns/min of speed of agitator, in different electrochemical reactors After handling 0.5-1h under different condition, then with autoclave diaphragm filter press filter-press dehydration, operating pressure 1.5Mpa, dewatering time 0.3h, through detection cyanobacteria moisture content of the cake in 50-60%, algal toxin degradation rate is up to 98% or more.Through provided in this embodiment After method is handled under the conditions of different tests, treatment effect is detailed in following table.
* moisture content refers to that cyanobacteria after just sinking, is sent into the moisture content of the algae solution of electrochemical reactor
As can be seen from the above embodiments, present invention process process is simple, and algae toxin removal efficiency reaches 98% or more, and is dehydrated Effect is good, is handled during cyanobacteria detoxification can be made to be dehydrated furthermore with this method, any chemical substance is not added into system, It ensure that original ingredient of algal gel, the more conducively Deep of cyanobacteria.Entire treatment process method is simple, and operation is controllable, can The secondary pollution of effective algal toxin degradation for solving the problems, such as blue algae resource process, deep dehydration and dehydration.

Claims (10)

1. a kind of method of the electrochemistry detoxification and deep dehydration of cyanobacteria liquid, which comprises the steps of:
(1) the cyanobacteria liquid investment primary sedimentation tank after salvaging is subjected to preliminary stratification, the cyanobacteria liquid stream of lower layer enters band agitating function Electrochemical reactor in;
(2) tank voltage and agitator speed of electrochemical reactor are set, electrochemical reactor and its agitating function are opened, in electricity It is dehydrated Cells of Blue-green Algae broken wall under field force and churned mechanically synergy, metal composite oxide in simultaneous electrochemical reactor The algae toxin of the continuous oxidative degradation cyanobacteria release of the hydroxyl radical free radical that active coating titanium mesh plate anode generates, completes the broken wall of cyanobacteria Dehydration and During Detoxification;
(3) cyanobacteria liquid stream enters high pressure filter-pressing device in electrochemical reactor, carries out deep dehydration, finally obtains cyanobacteria mud cake.
2. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that step (2) it is 10-30V that the tank voltage of the setting electrochemical reactor and agitator speed, which are setting tank voltage, and revolving speed is set in 50- 200 turns/min, time 0.5-1h.
3. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that step (3) the high pressure filter-pressing device is preferably autoclave diaphragm filter press, operating pressure 1.2-2Mpa, dewatering time 0.2-0.5h.
4. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that described first Heavy pond (1) bottom is connect by inlet tube (4) with electrochemical reactor (2), and electrochemical reactor (2) bottom is provided with drain pipe (5) it is connect with high pressure filter-pressing device (3).
5. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that the electricity Chemical reactor (2) is cylindrical metal cylinder, is provided with shaft (6) in electrochemical reactor (2), and shaft (6) upper end is stretched out Electrochemical reactor (2) is fixedly connected by shaft coupling (7) with the output shaft of motor (8) outside.
6. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that described multiple Metal oxide active coating titanium mesh plate anode (9) are closed to be upper and lower two groups mutually perpendicular alloy web plates and be fixedly connected on shaft (6) on.
7. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 6, which is characterized in that described multiple The metal composite oxide for closing metal oxide active coating titanium mesh plate anode (9) includes brown lead oxide, ruthenium iridium composite oxide Or iridium tantalum composite oxides.
8. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 6, which is characterized in that described multiple It closes metal oxide active coating titanium mesh plate anode (9) and passes through the electric slip ring (10) and electrochemical reaction that are set on shaft (6) The anode for the DC power supply (11) that device (2) is arranged outside connects, the cathode terminal (12) on electrochemical reactor (2) metal cylinder It is connect with the cathode of power supply (11).
9. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 1, which is characterized in that described multiple The aperture for closing the web plate of metal oxide active coating titanium mesh plate anode (9) is 1~5mm, metal composite oxide active coating The outer ledge of titanium mesh plate anode (9) is 5~20mm at a distance from electrochemical reactor (2) cylinder madial wall.
10. the method for the electrochemistry detoxification and deep dehydration of cyanobacteria liquid according to claim 4, which is characterized in that described The first valve (13) and the second valve (14) are respectively arranged on the inlet tube (4) and drain pipe (5) of electrochemical reactor (2).
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