CN104944588B - Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation - Google Patents
Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation Download PDFInfo
- Publication number
- CN104944588B CN104944588B CN201510304909.0A CN201510304909A CN104944588B CN 104944588 B CN104944588 B CN 104944588B CN 201510304909 A CN201510304909 A CN 201510304909A CN 104944588 B CN104944588 B CN 104944588B
- Authority
- CN
- China
- Prior art keywords
- anode
- cathode
- waste water
- plant
- opening reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The application provides a chromium-containing waste water treatment system and method adopting coupling of a biological electrochemical method and phytoremediation. The system comprises an open reactor, wherein a water inlet is formed in the lower part of the open reactor; a water outlet is formed in the upper part of the open reactor; a packing layer is arranged at the bottom of the open reactor, and comprises a substrate and microorganisms loaded on the substrate; an anode is arranged in the packing layer; a conducting material is distributed on the surface of the anode; a cathode supporting frame is fixed at the part, corresponding to the water outlet, of the open reactor; an air cathode is placed on the cathode supporting frame; the air cathode is in contact with the water level of chromium-containing waste water to be treated through the cathode supporting frame, and is connected with the anode through a conducting wire; plants are planted in the open reactor and sequentially penetrate through the cathode and the cathode supporting frame, and the root parts of the plants extend into the packing layer. According to the invention, the biological electrochemical method and phytoremediation are combined, so that the waste water treatment time is greatly shortened, and the treatment efficiency is improved.
Description
Technical field
The present invention relates to chromate waste water technical field of carrying out a biological disposal upon, more particularly to a kind of bio electrochemistry method coupling plant is repaiied
Multiple system for processing chrome-containing wastewater and method.
Background technology
Chromium in environment mainly exists with two kinds of valence states of Cr (III) and Cr (VI), wherein, after Cr (VI) enters biology in vivo
Meeting modificator gene is mutated and has carcinogenic probability, and its toxicity is higher more than 100 times than Cr (III).Therefore, how water environment is processed
In Cr (VI) increasingly paid close attention to by people.
Phytoremediation chromate waste water be carry out a biological disposal upon chromate waste water typical technology, with investment and energy consumption it is low, safeguard letter
Single and little to environmental disruption the features such as.When Cr (VI) waste water is contained in a large number using phytoremediation technology process, Cr (VI) is mainly logical
Cross the approach such as packing layer absorption, micro-reduction and root system of plant absorption to remove.
However, when processing containing Cr (VI) waste water in aforementioned manners, processing procedure is slow, time-consuming, so as to cause to process effect
Rate is low.Therefore, the problems such as how realizing the speed for accelerating to process Cr (VI), the efficiency of fortification of plants repair process chromate waste water needs
Further to solve.
The content of the invention
In view of this, the application provides a kind of bio electrochemistry method coupling phytoremediation system for processing chrome-containing wastewater and side
Method, the processing system processing waste water containing chrome provided using the present invention can shorten process time, improve treatment effeciency.
The present invention provides a kind of bio electrochemistry method and couples phytoremediation system for processing chrome-containing wastewater, including：
Opening reactor, the opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and is supported in the substrate
Microorganism；Anode is provided with described filler layer, the anode surface is distributed with conductive material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, places free on the cathode branch support
Gas negative electrode, the air cathode is contacted by cathode branch support with the water surface of pending chromate waste water, and with anode by leading
Line connects；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode support
Frame, and extend in packing layer.
Preferably, the vertical dimension between the anode and air cathode is maintained at 10cm～40cm.
Preferably, any one of the anode in carbon felt, carbon brush, graphite granule, graphite rod and stainless steel cloth；
Any one of the air cathode in carbon felt, carbon plate and carbon cloth.
Preferably, the conductive material of the anode surface distribution is in graphite granule, carbon granule and NACF
One or more.
Preferably, described filler layer is covered in opening reactor bottom, and its volume is the 1/4 of opening reactor cumulative volume
～3/4；
The anode is arranged at the height of packing layer 1/2～2/3.
Preferably, described filler layer substrate is in graphite granule, activated carbon granule, pelelith, zeolite, haydite and gravel
One or more；
The cathode branch support has loose structure, and its diameter is equal with opening reactor inside diameter.
Preferably, the plant is selected from one or more in rye grass, Leersia Sw, Value of Spartina Anglica, Rhizoma Acori Graminei and phragmites communiss.
Preferably, it is provided with resistance on the loop that the air cathode and anode are connected by wire.
Preferably, the system also includes：
The recycle feed device communicated with opening reactor water inlet and outlet；
The analytical equipment of the loop parallel connection being connected by wire with anode with air cathode.
The present invention also provides a kind of bio electrochemistry method coupling phytoremediation chromium containing waste water treatment method, including following step
Suddenly：
Pending chromate waste water is introduced into opening reactor to be processed, the water outlet after being processed；
The opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and is supported in the substrate
Microorganism；Anode is provided with described filler layer, the anode surface is distributed with conductive material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, places free on the cathode branch support
Gas negative electrode, the air cathode is contacted by cathode branch support with the water surface of pending chromate waste water, and with anode by leading
Line connects；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode support
Frame, and extend in packing layer.
Pending chromate waste water is introduced processing system by the present invention, from the opening reactor lower part water inlet of processing system
In injection packing layer, until water surface ingress of air negative electrode；The plant of plantation is in growth course in the opening reactor, root
The secretions such as organic acid are discharged to anode, it is ensured that growth of microorganism near anode, while secretions are decomposed in microorganism produces electricity
Son simultaneously passes to anode；The pending chromate waste water is sequentially passed through and contacted with air cathode after packing layer, plant root, is given up
Cr (VI) in water obtains electronics and is reduced into Cr (III), the OH that Cr (III) is formed with cathode surface air reduction process-Ion is tied
Close and form precipitation, so as to process high-quality water outlet is obtained.In the present invention, in waste water Cr (VI) is through packing layer, sun
During pole, plant root and air cathode, absorbed and negative electrode by filler surface adsorption, micro-reduction, plant root
Removed after Surface Electrochemical Reduction and precipitation.Compared with prior art, the present invention repaiies bio-electrochemical process with plant
Recovering technology combines, and using bio-electrochemical process reduction of the Cr in waste water (VI) in cathode surface is realized, promotes Cr in waste water
(VI) its toxicity to plant is reduced and reduces, so as to the absorption of fortification of plants removes chromium, speed up processing is improved and processes effect
Rate.Experiment shows that the present invention can reach 99% by the clearance that bio electrochemistry strengthens Cr (VI) in after-treatment system,
Process time only needs 96 hours～130 hours, substantially reduces process time, improves treatment effeciency.
Further, the application can also realize reclaiming the purpose of the energy from waste water.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the structural representation of processing system provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of processing system processing waste water containing chrome provided in an embodiment of the present invention；
Fig. 3 is Cr (VI) content balance in the different time reactor of the experimental group of embodiment 1 and matched group.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The invention provides a kind of bio electrochemistry method couples phytoremediation system for processing chrome-containing wastewater, including：
Opening reactor, the opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and is supported in the substrate
Microorganism；Anode is provided with described filler layer, the anode surface is distributed with conductive material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, places free on the cathode branch support
Gas negative electrode, the air cathode is contacted by cathode branch support with the pending chromate waste water water surface, and passes through wire with anode
Connection；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode support
Frame, and extend in packing layer.
It is pending containing Cr in the bio electrochemistry method coupling phytoremediation system for processing chrome-containing wastewater that the present invention is provided
(VI) waste water is entered from opening reactor water inlet, through micro-reduction, plant absorption, and in cathode surface by receiving electricity
Cr (III) is reduced under the catalytic action of son and cathode surface microorganism, toxicity of the Cr to plant can be effectively reduced, so as to carry
High plant absorption effect；The Cr (III) for generating simultaneously further becomes Cr (OH)3Precipitate and be separated from the water, through shorter
Process time, the water outlet after process is finally flowed out from outlet, and treatment effeciency is high.
Referring to Fig. 1, Fig. 1 is the structural representation of processing system provided in an embodiment of the present invention.In Fig. 1,0 is opening reaction
Device, 1 is water inlet, and 2 is packing layer, and 3 is anode, and 4 is conductive material, and 5 is cathode branch support, and 6 is air cathode, and 7 is resistance,
8 is plant, and 9 is outlet, and 10 is wire.
Processing system provided in an embodiment of the present invention includes opening reactor 0, for providing the space for processing waste water.It is described
Opening reactor is open top and the housing with reaction chamber, while the reactor lower part that is open has water inlet 1, by water inlet
1 introduces pending chromate waste water, and the reactor top that is open has outlet 9, and the water outlet after process is flowed out from outlet 9.
Shape and volume to the opening reactor of the invention etc. is not particularly limited, and preferably columned opening is anti-
Answer device.In one embodiment of the invention, the reactor that is open is cylindric, is highly 30cm, and inside diameter is 11cm, is processed
The capacity of waste water is 1L；And water inlet is positioned away from mouthful reactor bottom 1cm, and outlet is positioned away from a mouthful reactor bottom
At 14cm.In another embodiment of the present invention, the reactor that is open is cylindric, is highly 18cm, and outside diameter is 12cm,
Inside diameter is 11.5cm.The water inlet and the generally circular in cross section hole of outlet, its big I is according to wastewater treatment capacity and flow velocity
Deng and design；The diameter of water inlet and outlet in the embodiment of the present invention is 2mm.The water inlet can be with position with outlet
In the same side of opening reactor, it is also possible to respectively positioned at the both sides of opening reactor.The present invention is to the opening reactor
Material is also not particularly limited, and such as can use lucite or polrvinyl chloride (PVC).
In the bottom of opening reactor 0, the embodiment of the present invention is provided with packing layer 2.Described filler layer includes substrate and load
Microorganism in the substrate, chromium can be in packing layer by substrate and micro-reduction, absorption in waste water.The present invention is filled out to described
The source of the bed of material is not particularly limited, and in the present invention, described filler layer substrate is preferably graphite granule, activated carbon granule, fire
One or more in mountain stone, zeolite, haydite and gravel；The microorganism is anaerobe commonly used in the art.
In one embodiment of the present of invention, described filler layer includes going out the graphite granule of anaerobe in water load with anode, described
Anode water outlet adopts the anode water outlet of the reactor of general electrochemical treatments sewage.In embodiments of the present invention, packing layer 2 is covered
In the bottom of opening reactor 0；The 1/4～3/4 of the volume of described filler layer preferably opening reactor cumulative volume.
Anode 3 is provided with the packing layer 2 of the embodiment of the present invention, growth near the anode has microorganism, and it will can be produced
Raw electronics passes to anode.In the present invention, the anode is preferably carbon felt, carbon brush, graphite granule, graphite rod and stainless steel silk
Any one in net, more preferably carbon felt or stainless steel cloth.Preferably, on the basis of opening reactor bottom, it is described
Anode is arranged at the height of packing layer 1/2～2/3.Size to the anode of the invention etc. is not particularly limited, at this
In bright one embodiment, the carbon felt that the anode is a diameter of 10cm, thickness is 5mm；The anode is preferably provided at filler
At the height of layer 2/3rds, the volume for being provided with the packing layer of anode is preferably the 1/4～3/4 of opening reactor cumulative volume.
The surface distributed of anode 3 of the embodiment of the present invention has conductive material 4, and it can be described as anode auxiliary material, is easy to collect
More electronics, while reducing reactor internal resistance, increase microorganism attachment.The conductive material of the anode surface distribution is preferably
One or more in conductive carbon material, more preferably graphite granule, carbon granule and NACF, most preferably graphite
Grain.The present invention is not particularly limited to the consumption of the conductive material, can respectively place one layer of conduction on the upper and lower surface of anode
Material.
At correspondence outlet 9, cathode branch support 5 is fixed with opening reactor 0, air cathode 6 is placed with thereon.At this
In inventive embodiments, Cr (VI) reaches air cathode 6 in waste water, electron reduction is received in its surface and generates Cr (III), generates
Most of Cr (III) Cr (OH) can be become in high pH water3Precipitation, is separated from the water, same so as to realize Cr (VI) and total Cr
Shi Gaoxiao is removed.
The Main Function of the cathode branch support 5 of the embodiment of the present invention is support air negative electrode 6, and makes air cathode and wait to locate
The water surface contact of the chromate waste water of reason.The cathode branch support is fixed on correspondence water outlet in opening reactor, can fix
Be stuck on opening reactor, it is also possible to regularly on opening reactor, the present invention is to the mode of the fixation without spy for frame
It is different to limit.The cathode branch support has loose structure, can be netted or porous material.In embodiments of the present invention,
The cathode branch support is the aerated plastics of a diameter of 11cm；The diameter of the cathode branch support and opening reactor inside diameter phase
Deng being directly abreast stuck in as reactor outlet on the position of height.
On cathode branch support 5, the embodiment of the present invention is placed with air cathode 6, its pass through cathode branch support 5 with it is pending
Chromate waste water water surface contact, and be connected by wire 10 with anode 3.In the present invention, the air cathode is preferably carbon
Any one in felt, carbon plate and carbon cloth, more preferably carbon felt.The air cathode is placed on cathode branch support, also, empty
Expose above gas negative electrode in atmosphere, can contact with the water surface of pending chromate waste water below, connected by wire and anode
Connect.Cr (VI) is contacted with air cathode and is obtained electron reduction into Cr (III), Cr (III) and cathode surface air reduction process in waste water
The OH of formation-Ions binding forms precipitation.In the present invention, the vertical dimension between the anode and air cathode preferably keeps
In 10cm～40cm, in order to avoid two electrode distances are excessive and cause reactor internal resistance excessive.The present invention is to the air cathode
Size etc. is not particularly limited, and in one embodiment of the invention, the air cathode is a diameter of 10cm, thickness is 5mm
Carbon felt；In another embodiment of the present invention, the air cathode is the carbon felt of a diameter of 11cm.
In the present invention, the air cathode surface is preferably inoculated with activated sludge, it is allowed to grow functional microorganism to promote
Enter the biocatalytic reduction of Cr (VI).The present invention is not particularly limited to the source of the activated sludge, normal using sewage disposal
Activated sludge.The conventional wire of the embodiment of the present invention connects anode, air cathode, forms closed-loop path.Make
For preferred, resistance 7 is provided with the loop that the air cathode and anode are connected by wire, makes the application process Cr (VI)
During can reclaim electric energy simultaneously.The resistance can be the resistance or the electrical equipment including resistance of reality, and resistance can not be too
It is low；In one embodiment of the invention, anode and negative electrode connect to form closed-loop path by the external resistance of 1000 Ω.
In opening reactor 0, embodiment of the present invention kind is implanted with plant 8；The plant root penetrates successively cloudy in air
Pole 6 and cathode branch support 5, and extend in packing layer 2.In the present invention, the plant of plantation can be absorbed in waste water in reactor
Cr (VI)；Root discharges the secretions such as organic acid to anode in the growing process, it is ensured that the microorganism of anode adnexa is given birth to
It is long, that is, plant root secretions can be by anode microorganism decomposition generation electronics, and the electronics of generation is passed in microorganism
Anode, electronics reaches negative electrode by wire；Most of Cr (VI) receives electronics by fast restore into Cr (III) in cathode surface,
Sunk by precipitation, and remaining free state Cr (III) continues to be absorbed by plant root, can so reduce it to plant
Toxic action with microorganism simultaneously improves removal efficiency.
In the present invention, the plant can be grass family, or Araeceae；The plant is preferably rye (Secale cereale L.)
One or more in grass, Leersia Sw, Value of Spartina Anglica, Rhizoma Acori Graminei and phragmites communiss, more preferably rye grass or Leersia Sw.According to plant not
The plant of plantation is preferably from germination to water planting culture before allograft reaction device in same growing state, embodiment of the present invention reactor
The plant of a period of time, and the plant transplanted preferably grows unanimously.
The plant root is penetrated successively air cathode and cathode branch support, i.e. air cathode and cathode support by the present invention
Correspondingly it is with holes on frame, passes through plant root.The present invention does not have special restriction to the quantity of the plant, at this
In one embodiment of invention, plant in reactor and be implanted with 40 plants of consistent rye grasses of growth, the rye grass is from germination to transplanting
Water planting culture 30 days before reactor.The embodiment of the present invention equably planting plants preferably in reactor, in negative electrode and its
Can be with one plant of a hole on bracing frame, it is also possible to many plants an of hole；In one embodiment of the invention, in the cathode between make a call to one it is straight
Footpath for 2.5cm aperture, through 40 plants of plants such as rye grass.The plant root is extended to packing layer by the embodiment of the present invention
It is interior, keep plant growing, i.e. described filler layer to include plant growing desired substance.
In the present invention, the system preferably also includes：The circulation communicated with opening reactor water inlet and outlet
Feed arrangement；The analytical equipment of the loop parallel connection being connected by wire with anode with air cathode.Referring to Fig. 2, Fig. 2 is the present invention
The schematic diagram of the processing system processing waste water containing chrome that embodiment is provided.In Fig. 2,0 is opening reactor, and 1 is water inlet, and 2 is to fill out
The bed of material, 3 is anode, and 5 is cathode branch support, and 6 is air cathode, and 7 is resistance, and 8 is plant, and 9 is outlet, and 10 is wire, 11
For recycle feed device, 12 is analytical equipment.
Processing system provided in an embodiment of the present invention preferably also includes recycle feed device 11, and it enters with opening reactor 0
The mouth of a river 1 and outlet 9 are communicated, for being passed through pending chromate waste water, reception processing after water outlet.The present invention is followed to described
Ring feed arrangement is not particularly limited, and generally comprises storage of waste water container and connects storage of waste water container with opening reactor
Pipeline, on the pipeline between storage of waste water container and opening reactor water inlet pump is provided with.According to factors such as wastewater volumes,
The recycle feed device is closed with the matching size of opening reactor.In one embodiment of the invention, the waste water
Storage container is brown bottle, and cumulative volume is bottled rear by peristaltic pump for the waste water brown of 5L, with certain flow velocity such as 200mL/h
It is continuous to enter from reactor lower part water inlet；Water outlet after process is out back to again in bottle from outlet.
Processing system provided in an embodiment of the present invention preferably also includes analytical equipment 12, and it leads to air cathode 6 and anode 3
The loop for crossing the connection of wire 10 is in parallel, for analyzing and processing waste water during the energy that reclaims etc..The present invention is to the analysis
Device is not particularly limited, and using commonly used in the art, such as computer is connected with voltage detector, then will series connection entirety
It is parallel on the closed-loop path of reactor.
The course of work of processing system provided in an embodiment of the present invention is as follows：By pending chromate waste water from processing system
Opening reactor lower part water inlet injection packing layer in, until water surface ingress of air negative electrode；Plantation in the opening reactor
Plant in growth course, root to anode discharge organic acid such as acetate (CH3COO-) etc. secretions, it is ensured that near anode
Growth of microorganism, while secretions are decomposed in microorganism, produces CO2、H+With electronics e, and the electronics of generation is passed to into anode；Institute
State pending chromate waste water and sequentially pass through and contact with air cathode after packing layer, plant root, the Cr (VI) in waste water
(Cr6+) obtain electronics e and be reduced into Cr (III) (Cr3+), the OH that most of Cr (III) is formed with cathode surface air reduction process-From
Son combines to form precipitate C r (OH)3, remaining Cr (III) continues to be absorbed by plant root, so as to process obtain it is high-quality go out
Water.
Accordingly, present invention also offers a kind of bio electrochemistry method coupling phytoremediation chromium containing waste water treatment method, bag
Include following steps：
Pending chromate waste water is introduced into opening reactor to be processed, the water outlet after being processed；
The opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and is supported in the substrate
Microorganism；Anode is provided with described filler layer, the anode surface is distributed with conductive material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, places free on the cathode branch support
Gas negative electrode, the air cathode is contacted by cathode branch support with the water surface of pending chromate waste water, and with anode by leading
Line connects；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode support
Frame, and extend in packing layer.
The present invention adopts processing system processing waste water containing chrome mentioned above, significantly shorten process time, improves place
Reason efficiency.
In the present invention, the content such as described opening reactor is as it was noted above, will not be described here.The present invention will be pending
Chromate waste water introduce opening reactor processed, wherein, the chromate waste water include Cr VI Cr (VI), pH value is generally
It is neutral.The present invention is not particularly limited to the source of the chromate waste water；In embodiments of the present invention, in the chromate waste water
Concentration is unsuitable too high, can have seriously to microorganism and plant in the range of 5mg/L～50mg/L, if excessive concentration
Toxic action.
Pending chromate waste water is controlled continuum micromeehanics by the embodiment of the present invention using pump, in one embodiment of the present of invention
In, waste water cumulative volume is 5L, is continuously entered from reactor lower part water inlet with the flow velocity of 200mL/h by peristaltic pump.At this
In bright, in opening reactor during processing waste water containing chrome, hydraulic detention time may be selected to be 4 days～8 days, and preferably 4 days～5
My god；And the growth of processing environment suitable for plant can play repair.
Bio-electrochemical process in combination with phytoremediation technology, using bio-electrochemical process waste water is realized by the present invention
Middle Cr (VI) promotes Cr (VI) in waste water to reduce and reduce its toxic action to plant growing in the reduction of cathode surface, from
And the absorption of fortification of plants removes chromium, speed up processing improves treatment effeciency.Experiment shows that the present invention passes through bioelectrochemical
The clearance for learning Cr (VI) in reinforcing after-treatment system can reach 99%, and process time only needs 96 hours～130 hours,
Process time substantially shortens, and treatment effeciency is higher.
For a further understanding of the application, the bio electrochemistry method provided the application with reference to embodiment couples plant
Repair system for processing chrome-containing wastewater and method is specifically described.
In following examples, chromate waste water used is simulated wastewater, and waste water cumulative volume is 5L, pH value is neutrality；It is used
Plant be rye grass, its from germination to water planting culture before allograft reaction device 30 days (with the Hoagland nutrition of 1/2 concentration
Liquid culture 30 days, wherein changing one time of nutrition liquid per three days, indoor temperature is 26 ± 2 DEG C, and 16h illumination, 8h is dark), Zhi Houxuan
Go out to grow consistent 40 plant to plant in the reactor；Carbon felt used is purchased from the industry carbon company limited of Beijing three；Filler used
Layer is the graphite granule for going out anaerobe etc. in water load with anode；The particle diameter of graphite granule used is 4mm～7mm, is purchased
From the industry carbon company limited of Beijing three.
Embodiment 1
In the processing system of the present embodiment, opening reactor is cylindric, is highly 18cm, and be open reactor outside diameter
It is 11.5cm for 12cm, inside diameter, opening reactor is made up of lucite；Water inlet is leaving a mouthful reactor bottom 1cm
High position, outlet is 2mm leaving a mouthful reactor bottom 14cm high position, the diameter of entery and delivery port.
The packing layer that total height is 5cm is coated with opening reactor bottom, 300 grams of graphite granules are added up to；With opening
On the basis of reactor bottom, the eminence of packing layer 2/3 is provided with the carbon felt as anode, and a diameter of 10cm of the carbon felt, thickness are
5mm。
The correspondence water outlet in opening reactor, abreast card have a cathode branch support, the diameter of cathode branch support with it is anti-
Answer device internal diameter equally big, cathode branch support has loose structure, material is aerated plastics；Conduct is placed with cathode branch support
The carbon felt of air cathode, a diameter of 11cm of the carbon felt, thickness are 5mm, and what the carbon felt and cathode branch support mesophase were answered is equipped with
The aperture of one a diameter of 2.5cm, rye grass root sequentially passes through air cathode and cathode branch support, and extends to packing layer
It is interior.
Using conventional wire, anode and negative electrode are connected to form closed-loop path by the external resistance of 1000 Ω.In air
Analytical equipment is parallel with the loop that negative electrode and anode are connected by wire.The processing system also includes recycle feed device,
It is communicated with opening reactor water inlet and outlet, and water inlet is provided with peristaltic pump.
Embodiment 2
In the processing system of the present embodiment, opening reactor is cylindric, is highly 30cm, and be open reactor inside diameter
It is 1L for 11cm, capacity, opening reactor is made up of PVC；Water inlet is leaving a mouthful reactor bottom 1cm high position, water outlet
Mouth is leaving a mouthful reactor bottom 14cm high position, and the diameter of entery and delivery port is 2mm.
The packing layer that total height is 5cm is coated with opening reactor bottom, 300 grams of graphite granules are added up to；With opening
On the basis of reactor bottom, the eminence of packing layer 2/3 is provided with the carbon felt as anode, and a diameter of 10cm of the carbon felt, thickness are
5mm。
The correspondence water outlet in opening reactor, abreast card have a cathode branch support, the diameter of cathode branch support with it is anti-
Answer device internal diameter equally big, cathode branch support has loose structure, material is aerated plastics；Conduct is placed with cathode branch support
The carbon felt of air cathode, a diameter of 11cm of the carbon felt, thickness are 5mm, and what the carbon felt and cathode branch support mesophase were answered is equipped with
The aperture of one a diameter of 2.5cm, rye grass root sequentially passes through air cathode and cathode branch support, and extends to packing layer
It is interior.Using conventional wire, anode and negative electrode are connected to form closed-loop path by the external resistance of 1000 Ω.
Embodiment 3
Using embodiment 1 provide processing system processed, the present embodiment by Cr (VI) content for 9.5mg/L simulation
Waste water with brown it is bottled after, by peristaltic pump with the flow velocity of 200mL/h continuously from reactor lower part water inlet enter, hydraulic retention
Time is 5 days, and the water outlet after process flowed out from outlet and be back to again in bottle.Per the water sample for taking 1mL for 12 hours, analyze water-soluble
Remaining Cr (VI) and total Cr concentration in liquid.Meanwhile, as blank, on the basis of same reactor negative electrode is not provided with
Mode operation is repaired with the common plant of anode.
The process of phytoremediation is combined as experimental group using the present embodiment bio electrochemistry, referring to Fig. 3, Fig. 3 is embodiment 1
Cr (VI) content balance in the different time reactor of experimental group and matched group.From figure 3, it can be seen that in experimental group reactor
Cr (VI) content declines rapidly, and the clearance of Cr (VI) is slowly in common plant treatment matched group reactor.
The removal efficiency result of experiment is repeated several times as shown in table 1, table 1 is the reactor removal of embodiment 3 and embodiment 4
The result of the efficiency of Cr (VI).Using Cr contents in plant body after National Standard Method ICP detection process, as a result referring to table 2, table 2 is real
Apply after the process of example 3 and embodiment 4 Cr contents in plant body.
Embodiment 4
Using embodiment 1 provide processing system processed, the present embodiment by Cr (VI) content for 19mg/L simulation
Waste water with brown it is bottled after, by peristaltic pump with the flow velocity of 200mL/h continuously from reactor lower part water inlet enter, hydraulic retention
Time is 4 days, and the water outlet after process flowed out from outlet and be back to again in bottle.Per the water sample for taking 1mL for 12 hours, analyze water-soluble
Remaining Cr (VI) and total Cr concentration in liquid.The process of phytoremediation is combined as experimental group using the present embodiment bio electrochemistry,
Meanwhile, used as blank, the common plant that negative electrode and anode are not provided with the basis of same reactor repairs pattern fortune
OK.
The removal efficiency result that experiment is repeated several times is as shown in table 1；Using Cr in plant body after National Standard Method ICP detection process
Content, as a result referring to table 2.
The reactor of the embodiment 3 of table 1 and embodiment 4 removes the result of the efficiency of Cr (VI)
As it can be seen from table 1 by bio electrochemistry strengthen after phytoremediation waste water Cr (VI) treatment effeciency highest
99% is can reach, process time only needs 96 hours, substantially increase treatment effeciency and shorten process time.
Cr contents in plant body after the process of the embodiment 3 of table 2 and embodiment 4
DW* is plant dry weight.
Result in table 2 shows that, when phytoremediation processes Cr (VI) after bio electrochemistry reinforcing, Cr (VI) is in negative electrode table
It is the relatively low Cr (III) of toxicity that electron reduction is obtained on face, reduces its toxic action to plant growing, improves plant to Cr
Absorption and accumulation content, enhance plant remove Cr efficiency.
Meanwhile, the output voltage that the reactor of closed-loop path is produced in processing procedure can reach 450mV.
As seen from the above embodiment, in the present invention, Cr (VI) in waste water is through packing layer, anode, plant root
During air cathode, by filler surface adsorption, micro-reduction, plant root absorption and cathode surface electrochemistry also
Removed after former and precipitation.Compared with prior art, the present invention by bio-electrochemical process in combination with phytoremediation technology,
Reduction of the Cr in waste water (VI) in cathode surface is realized using bio-electrochemical process, promotes Cr (VI) in waste water to reduce and reduce
Its toxicity to plant, so as to the absorption of fortification of plants removes chromium, speed up processing improves treatment effeciency.Experiment shows, this
Invent the clearance that Cr (VI) in after-treatment system is strengthened by bio electrochemistry and can reach 99%, process time only needs
96 hours～130 hours, process time is substantially reduced, improve treatment effeciency.In addition, the application can also be realized from waste water
Reclaim the purpose of the energy.
Claims (9)
1. a kind of bio electrochemistry method couples phytoremediation system for processing chrome-containing wastewater, including：
Opening reactor, the opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and the micro- life being supported in the substrate
Thing；Anode is provided with described filler layer, the anode surface is distributed with conductive material；The anode is selected from carbon felt and rustless steel
Any one in silk screen；The conductive material of the anode surface distribution is selected from conductive carbon material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, air is placed with the cathode branch support cloudy
Pole, the air cathode is contacted by cathode branch support with the water surface of pending chromate waste water, and is connected by wire with anode
Connect；Vertical dimension between the anode and air cathode is maintained at 10cm～40cm；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode branch support, and
Extend in packing layer.
2. system according to claim 1, it is characterised in that the air cathode is in carbon felt, carbon plate and carbon cloth
Any one.
3. system according to claim 1, it is characterised in that the conductive material of the anode surface distribution is selected from graphite
One or more in grain, carbon granule and NACF.
4. system according to claim 1, it is characterised in that described filler layer is covered in opening reactor bottom, and its
Volume is the 1/4～3/4 of opening reactor cumulative volume；
The anode is arranged at the height of packing layer 1/2～2/3.
5. system according to claim 1, it is characterised in that described filler layer substrate is selected from graphite granule, activated carbon
One or more in grain, pelelith, zeolite, haydite and gravel；
The cathode branch support has loose structure, and its diameter is equal with opening reactor inside diameter.
6. system according to claim 1, it is characterised in that the plant is selected from rye grass, Leersia Sw, Value of Spartina Anglica, Chang
One or more in Pu and phragmites communiss.
7. system according to claim 1, it is characterised in that the loop that the air cathode is connected with anode by wire
On be provided with resistance.
8. system according to claim 1, it is characterised in that the system also includes：
The recycle feed device communicated with opening reactor water inlet and outlet；
The analytical equipment of the loop parallel connection being connected by wire with anode with air cathode.
9. a kind of bio electrochemistry method couples phytoremediation chromium containing waste water treatment method, comprises the following steps：
Pending chromate waste water is introduced into opening reactor to be processed, the water outlet after being processed；
The opening reactor lower part has water inlet, and top has outlet；
The opening reactor bottom is provided with packing layer, and described filler layer includes substrate and the micro- life being supported in the substrate
Thing；Anode is provided with described filler layer, the anode surface is distributed with conductive material；The anode is selected from carbon felt and rustless steel
Any one in silk screen；The conductive material of the anode surface distribution is selected from conductive carbon material；
Correspondence water outlet is fixed with cathode branch support in the opening reactor, air is placed with the cathode branch support cloudy
Pole, the air cathode is contacted by cathode branch support with the water surface of pending chromate waste water, and is connected by wire with anode
Connect；Vertical dimension between the anode and air cathode is maintained at 10cm～40cm；
Plant in the opening reactor and be implanted with plant, the plant root is penetrated successively in air cathode and cathode branch support, and
Extend in packing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510304909.0A CN104944588B (en) | 2015-06-04 | 2015-06-04 | Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510304909.0A CN104944588B (en) | 2015-06-04 | 2015-06-04 | Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104944588A CN104944588A (en) | 2015-09-30 |
| CN104944588B true CN104944588B (en) | 2017-05-03 |
Family
ID=54159730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510304909.0A Active CN104944588B (en) | 2015-06-04 | 2015-06-04 | Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104944588B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107487865A (en) * | 2017-09-12 | 2017-12-19 | 中山大学 | A kind of bioelectrochemistry effectively processing phenolic waste water containing chromium and the method produced electricity |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201240946Y (en) * | 2008-06-17 | 2009-05-20 | 桂林工学院 | Apparatus for restoring chromium polluted water |
| CN103395891B (en) * | 2013-07-23 | 2015-01-28 | 东南大学 | Microbial fuel cell type three-dimensional combined ecological floating bed device and application thereof |
| CN104505529B (en) * | 2014-12-02 | 2016-08-24 | 哈尔滨工业大学 | The collaborative environmental microbiological fuel cell of phycomycete and the method utilizing its water purification to produce electricity |
-
2015
- 2015-06-04 CN CN201510304909.0A patent/CN104944588B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104944588A (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105906159B (en) | A kind of double coupled systems for the processing of irrigated area reinforced sewage | |
| CN103975788B (en) | Potted plant and the method for the microbiological fuel cell of in-situ immobilization is polluted for soil Cr | |
| CN110143720A (en) | A kind of the artificial swamp microbiological fuel cell coupling device and its wastewater treatment method of multimedium filtrate | |
| CN105253979B (en) | Flocculating purifying agent of river course heavy metal containing sewage and preparation method thereof and application method | |
| CN108275776A (en) | Anaerobic fluidized bed series connection artificial swamp type microbial fuel cell unit and method | |
| CN103936234A (en) | Domestic sewage treatment system utilizing solar energy and treatment method of same | |
| CN112170474A (en) | Method for repairing arsenic-polluted soil by electrically-driven reinforced permeable reactive barrier | |
| CN110357245A (en) | Handle iron-carbon micro-electrolysis-microbiological fuel cell-artificial swamp set composite of agricultural chemicals waste water | |
| CN100455526C (en) | Aeration inner circulation type garbage infiltration liquid two-phase treatment reactor | |
| CN108793395A (en) | Construction method, denitrification dephosphorization apparatus and the denitrification and dephosphorization method of denitrification dephosphorization apparatus | |
| CN104944588B (en) | Chromium-containing waste water treatment system and method adopting coupling of biological electrochemical method and phytoremediation | |
| CN105036490B (en) | Method for removing nitrogen through treating refuse leachate by using two-stage feedwater mineralized refuse reactor | |
| CN206814494U (en) | A kind of removal lead, the feulcell prototype artificial swamp of zinc heavy metal | |
| CN109704520A (en) | Utilize plant-deposition microbiological fuel cell processing polluted river water method | |
| CN108862613B (en) | Method and system for removing radionuclide/heavy metal in water body by low-voltage electric field-plant | |
| CN107010734A (en) | A kind of removal lead, the feulcell prototype artificial swamp of zinc heavy metal | |
| CN104876409A (en) | Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof | |
| CN104944575B (en) | Biological treatment method of acidic sulfate wastewater containing Fe3+ and Cu2+ | |
| CN218709624U (en) | Bioelectricity reinforced combination device for treating antibiotic-containing biogas slurry | |
| CN102795743A (en) | Maintenance repair apparatus for closed water bodies | |
| CN207845442U (en) | The device of multistage up-flow surface water body nitrogen removal synchronous with organic matter | |
| CN201010581Y (en) | Aerating inner loop type garbage leachate diphasic treating effector | |
| CN210825887U (en) | System for handle mud heavy metal | |
| CN209507758U (en) | One kind spreads cultivation device for river indigenous microorganism | |
| CN108623077A (en) | A kind of device of advanced treatment of industrial wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |