CN109110960A - The preparation method of the nano zero valence iron of sewage disposal system, processing method and modification infusorial earth load based on nano zero valence iron - Google Patents
The preparation method of the nano zero valence iron of sewage disposal system, processing method and modification infusorial earth load based on nano zero valence iron Download PDFInfo
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- CN109110960A CN109110960A CN201811011574.3A CN201811011574A CN109110960A CN 109110960 A CN109110960 A CN 109110960A CN 201811011574 A CN201811011574 A CN 201811011574A CN 109110960 A CN109110960 A CN 109110960A
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- valence iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 126
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000010865 sewage Substances 0.000 title claims abstract description 73
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 59
- 230000004048 modification Effects 0.000 title claims abstract description 27
- 238000012986 modification Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003814 drug Substances 0.000 claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 26
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- 238000005189 flocculation Methods 0.000 claims abstract description 15
- 230000016615 flocculation Effects 0.000 claims abstract description 15
- 230000009467 reduction Effects 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 230000014759 maintenance of location Effects 0.000 claims abstract description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 66
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 44
- 229910052799 carbon Inorganic materials 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 35
- 238000002386 leaching Methods 0.000 claims description 23
- 235000006408 oxalic acid Nutrition 0.000 claims description 22
- 239000010802 sludge Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 239000006004 Quartz sand Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 238000012377 drug delivery Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- 229920002101 Chitin Polymers 0.000 claims description 10
- 229920001661 Chitosan Polymers 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 229940079593 drug Drugs 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 4
- 239000002360 explosive Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000009287 sand filtration Methods 0.000 claims description 3
- 230000001112 coagulating effect Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims 1
- 238000012644 addition polymerization Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001603 reducing effect Effects 0.000 abstract description 3
- 238000006722 reduction reaction Methods 0.000 description 14
- 239000000706 filtrate Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 5
- 239000000543 intermediate Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000001311 chemical methods and process Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
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- 101150054854 POU1F1 gene Proteins 0.000 description 3
- 238000011953 bioanalysis Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 241000009298 Trigla lyra Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical group N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009298 carbon filtering Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Present invention discloses the preparation methods for the nano zero valence iron that sewage disposal system, processing method and modification infusorial earth based on nano zero valence iron load, wherein processing system includes sequentially connected reduction treatment pond, carries out sewage treatment in pond by the nano zero valence iron that the modification infusorial earth in it loads；Flocculation basin makes the pollutant in it in sewage flocculate by flocculant；Efficient sedimentation tank has the structure of mud, water separation in sewage therethrough；Filter has retention by the structure of the pollutant in the sewage in it；Clear water reserviors, for by the pH value adjustment of the sewage in it to discharge standard.This programme can sufficiently be reacted with nitrate using nano zero valence iron, high to the removal efficiency of nitrate；This system does not need the pH condition of strict control reaction simultaneously, applied widely, in addition, reducing the usage amount of medicament, greatly reduces operating cost, and reaction condition is mild, and process safety, cost of investment is low, simple process, and operation and maintenance are easy.
Description
Technical field
The present invention relates to sewage treatment field, be based especially on the sewage disposal system of nano zero valence iron, processing method and
The preparation method of modified Nano Zero-valent Iron.
Background technique
The nitrate treatment technology in sewage mainly has physical-chemical process, chemical reduction method and bioanalysis at present.
Physical-chemical process mainly has ion-exchange, reverse osmosis and electrodialysis etc., and physical-chemical process only turns pollutant
It moves or is concentrated, cannot be completely removed, thus be restricted in practice.Other than ion-exchange, other physical chemistry
Method is commonly used in the reparation of small-scale nitrate, polluted by nitrogen, and costly, and ion-exchange denitrogenation is by anion exchange
The NO in same sex ion and water in agent3-It swaps, thus achieve the effect that denitrogenation, but resin regeneration low efficiency, selection
Property it is poor, regenerative process generate waste liquid, cause secondary pollution.
Chemical method can be divided into two class of active metal reduction method and catalytic reduction method according to reducing agent difference.Also with active metal
The major defect of former method removal nitrate is to want strict control pH value, and primary product is ammonia nitrogen, and nitrogen selective is lower.Catalysis is also
Former method is using hydrogen as reducing agent, and metal is catalyst, and reduction nitrate achievees the purpose that removal, the disadvantages of the method are as follows with hydrogen
Gas is reducing agent, higher cost, and risk is higher.
Bioanalysis is using organic carbon source as electron donor, with NO3-For electron acceptor, in the connection of Nitrosomas and Nitromonas
Cooperation with it is lower by nitrate transformation at the process of nitrogen, the shortcomings that bioanalysis be reaction slowly, need organic matter as electron donor,
The disadvantages of complex process, operation and maintenance trouble.
Summary of the invention
The object of the invention is to provide a kind of based on modified diatom to solve the above-mentioned problems in the prior art
The preparation method of the sewage disposal system of nano zero valence iron of soil load, processing method and modified Nano Zero-valent Iron.
The purpose of the present invention is achieved through the following technical solutions:
Sewage disposal system based on nano zero valence iron, including it is sequentially connected
Reduction treatment pond carries out sewage treatment in pond by the nano zero valence iron that the modification infusorial earth in it loads；
Flocculation basin makes the pollutant in it in sewage flocculate by flocculant；
Efficient sedimentation tank has the structure of mud, water separation in sewage therethrough；
Filter has retention by the structure of the pollutant in the sewage in it；
Clear water reserviors, for by the pH value adjustment of the sewage in it to discharge standard.
Preferably, in the sewage disposal system based on nano zero valence iron, the reduction treatment pond and/or flocculation basin
And/or clear water reserviors connect drug delivery device, the drug delivery device includes
Medicinal cupping, for configuring, loading medical fluid；
Medicine supplying pipe road, connects the medicinal cupping and by medicinal liquid lead explosive barrel therein, has on the pipeline on the medicine supplying pipe road
Transparent section or observation window；
An at least dosing branch connects the medicine supplying pipe road, and controls on-off by valve；
Return line connects the medicine supplying pipe road and medicinal cupping, controls on-off and the connection of itself and medicine supplying pipe road by valve
Point is located at the tie point front end of dosing branch and medicine supplying pipe road, and is arranged close to the rear end of itself and the tie point on the medicine supplying pipe road
There is open and close valve.
Preferably, in the sewage disposal system based on nano zero valence iron, the filter is sandfiltration pot and/or work
Property carbon filter.
Preferably, in the sewage disposal system based on nano zero valence iron, the filter is active carbon filter,
The active carbon filter includes tank body, and the intracavity bottom of the tank body is filled with quartz sand layer, is covered on the quartz sand layer
Active charcoal filtrate, and mesh aperture is provided between them less than quartz sand particle size and carbon leaching material particle size
Anti- mixed grid, the carbon leaching material are located between anti-mixed grid and anti-race material strainer, and the anti-aperture for running material strainer is less than
The particle size of the carbon leaching material.
It preferably, further include connecting with the efficient sedimentation tank in the sewage disposal system based on nano zero valence iron
The sludge treatment equipment connect, the sludge treatment equipment connect collecting pit, and the collecting pit connects reaction tank.
The preparation method of the nano zero valence iron of modification infusorial earth load, carries out following steps under anaerobic:
S1 is modified diatomite by oxalic acid solution to obtain the modified diatomite of oxalic acid；
S2 is modified by the chitosan diatomite modified to oxalic acid, obtains chitin modified diatomite；
Chitin modified diatomite is added to FeSO by S34·7H2It is stirred in O solution after a certain period of time, to mixture
Isometric NaBH is slowly added dropwise in system4Solution is simultaneously reacted by following reaction formula,
Fe2++2BH4 -+6H2O=Fe0+2B(OH)3+7H2
After the reaction was completed, by be centrifugally separating to obtain modification infusorial earth load nano zero valence iron, and with deionized water with
It is dry after ethyl alcohol cleaning.
Preferably, in the preparation method of the nano zero valence iron of modification infusorial earth load, in the S1 step, will be not less than
The diatomite of 100 mesh is added stirring 3h in oxalic acid solution and is modified.
Preferably, in the preparation method of the nano zero valence iron of modification infusorial earth load, in the S2 step, by chitosan
It is added in oxalic acid solution and obtains modified solution, the modified diatomite of oxalic acid, chitosan and grass are then added into modified solution
The mass ratio of sour modification infusorial earth is 1:10, after stirring, is filtered, washed and dries under vacuum conditions.
Preferably, in the preparation method of the nano zero valence iron of modification infusorial earth load, in the S3 step, the Fe2+With shell
The mass ratio of the modified diatomite of glycan is 1:5.
The processing method of sewage disposal system based on nano zero valence iron is used for sewage treatment containing nitrate comprising such as
Lower process:
S10, in the nano zero valence iron also raw sewage for the modification infusorial earth load being prepared by any of the above-described method
Nitrate；
Sewage Jing Guo S10 step is realized mud-water separation by flocculation sedimentation by S20；
Sewage Jing Guo S20 step is filtered by S30；
S40, after the pH value adjustment to 6-9 of the water outlet of filter, qualified discharge.
Preferably, in the processing method of the sewage disposal system based on nano zero valence iron, in S1 step, enter
The nitrate concentration of sewage in reaction tank exists in 18-23mg/L, the dosage of the nano zero valence iron of modification infusorial earth load
5.1-5.2g/L, when reaction, the mixing speed of blender is between 75-85rpm, and the reaction time is between 55-65 minutes.
Preferably, the processing method of the sewage disposal system based on nano zero valence iron, further includes S50, and coagulation is heavy
Sludge behind shallow lake is concentrated, transports outward disposition after dehydration, during the dehydration process, polyacrylamide is added in sludge dewatering equipment.
The advantages of technical solution of the present invention, is mainly reflected in:
This programme deft design, structure is simple, using nano zero valence iron strong reducing property can sufficiently with the nitre in waste water
Hydrochlorate is reacted, high to the removal efficiency of nitrate；This system does not need the pH condition of strict control reaction simultaneously, is applicable in model
Enclose wide, in addition, reducing the usage amount of medicament, greatly reduce operating cost, reaction condition is mild, process safety, investment at
This low, simple process, operation and maintenance are easy.
Since diatomite has special microcellular structure, there are very big porosity and specific surface area, chemical stability is high, and
And can according to need progress surface and be modified, it is a kind of excellent carrier material, meanwhile, diatomite surface has negative electrical charge, bears
Potential point can be described as Fe2+Adsorption site, diatomite has good dispersibility in addition, be added in preparation system diatomite it
Afterwards, it can effectively inhibit the contact and reunion between nano iron particles, keep nano zero valence iron thereon evenly dispersed, not only maintain and receive
Rice Zero-valent Iron inherent characteristic, and can improve its stability, and agglomerate and shakiness easily occurs in effective solution nano zero valence iron
Fixed problem；Also the amount that nano zero valence iron is lost with water flow in use process is greatly reduced, material consumption is reduced.
Diatomite is modified by chitosan and oxalic acid, on the one hand increases the number of perforations of diatomite and hole area；
On the other hand make its surface with-OH and-NH2 group, be conducive to improve diatomite to Fe2+Load capacity.
Drug delivery device of the invention increases observation window or transparent section on medicine supplying pipe road, can intuitively run through pipeline Chinese medicine
The mobility status of liquid, so as to the medicament dissolution feelings for judging the case where pipeline is with the presence or absence of blocking and being able to confirm that in medical fluid
Condition, and return line is combined, medicament can be made to be back to dosing by return line when observing that medicament dissolution is insufficient
It is dissolved again in bucket, avoids the problem that causing drug effect to be unable to give full play because dissolution is insufficient, one can also be passed through
Pipeline, a circulating pump are continuously multiple dosing branches for medicine, avoid multiple dosing branches and are respectively necessary for by independent force (forcing) pump
Lead to the problem of structure is complicated and increased costs for medicine.
Drug delivery device adds control valve by the tie point in reflux line Yu medicine supplying pipe road, can effectively reduce medicament not
The medical fluid sufficiently dissolved for output, so as to improve the utilization efficiency of medicament.
Y-type filter is installed on the medicament output channel of drug delivery device, can will increase fast solid impurity and filter out, thus
Compound pump is protected, guarantees that medicament output channel is unimpeded.
Drug delivery device increases image capture device, can automate by visual identity and realize line clogging state
And the on-line monitoring of dosing solutions state, human cost caused by artificial observation is eliminated, so as to realize control valve automatically
On-off control, high degree of automation.
Drug delivery device makes water return pipeline extend to the bottom of medicine-adding bin and connects water distributor, when can be discharged using water distributor
Bubble and turbulent water of generation etc. mix medicament with liquid, so as to save the equipment such as dedicated blender, knot
Structure more simplifies, while the uniformity of water distribution is also capable of the uniform shape and adequacy of medicament distribution；Make the water outlet of water distributor simultaneously
Mouth upward, is conducive to increase driving force, accelerates mixing.
Active carbon filter of the invention can effectively avoid quartz sand in backwash process by the design of anti-mixed grid
Layer and carbon leaching material generate mixing, while can effectively reduce quartz sand layer to the impact force of activated carbon filter layer, avoid
There is situation at random in carbon leaching material, in addition, the anti-design for running material strainer, can effectively align the movement of carbon leaching material
It is limited, further avoid filtrate causes race to be expected because the impact of water flow and quartz sand is detached from from filter material layer and is taken away by water flow
The problem of, the stability of carbon leaching material structure and the adequacy of filtrate amount are advantageously ensured that, to improve the stability of filtering
With extension filtrate service life, guarantee filter effect.
The setting of water distributor effectively reduces the impact force into water in active carbon filter, while ensure that water-flow equation
Uniformity, reduce to carbon leaching material and the disturbance of filtering contaminants, ensure that effluent characteristics.
Carbon leaching material is contained using filtrate band in active carbon filter, convenient for carrying out active carbon filtration from tank body upper opening
The whole of material removes and replacement, easy to operate, speed is fast, and filtrate will not be spread outside in replacement process, can be avoided secondary pollution.
The setting of universal wheel in active carbon filter, effective solution tank body moves integrally and fixed problem, improves
The flexibility of application.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the schematic diagram of the chemicals dosing plant in the present invention；
Fig. 3 is the schematic diagram of active carbon filter of the invention.
Specific embodiment
The purpose of the present invention, advantage and feature, by by the non-limitative illustration of preferred embodiment below carry out diagram and
It explains.These embodiments are only the prominent examples using technical solution of the present invention, it is all take equivalent replacement or equivalent transformation and
The technical solution of formation, all falls within the scope of protection of present invention.
In the description of scheme, it should be noted that term " center ", "upper", "lower", "left", "right", "front", "rear",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of description and simplification description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " the
Two ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.Also, in the description of scheme
In, it is proximal end by the direction of proximal operator using operator as reference, the direction far from operator is distal end.
The sewage disposal system based on nano zero valence iron disclosed with reference to the accompanying drawing to the present invention is illustrated, preferably
For the sewage treatment containing nitrate, as shown in Fig. 1 comprising sequentially connected
Collecting pit 1, for collecting sewage and sewage being made to homogenize；
Reduction treatment pond 2 carries out sewage treatment in pond by the nano zero valence iron that modification infusorial earth loads；
Flocculation basin 3 makes the pollutant in it in sewage flocculate by flocculant；
Efficient sedimentation tank 4 has the structure of mud, water separation in sewage therethrough；
Intermediate pool 5, the sewage isolated for accumulating efficient sedimentation tank 4；
Filter 6 has retention by the structure of the pollutant in the sewage in it；
Clear water reserviors 7, for by the pH value adjustment of the sewage in it to discharge standard.
As shown in Fig. 1, the collecting pit 1 passes through reduction treatment pond 2 described in the piping connection with pump, the also original place
Blender 21 and PH meter 22 are provided in reason pond 2, the reduction treatment pond 2 is described by connecting the flocculation basin 3 from circulation road
Blender 31 and PH machine 32 are provided in flocculation basin 3, the flocculation basin 3 is by connecting the efficient sedimentation tank 4, institute from circulation road
It states efficient sedimentation tank 4 and passes through the inclined plate being arranged inside for the particulate matter blocking in the sewage of rising, make its precipitating；It is described efficiently heavy
Shallow lake pond 4 connects intermediate pool 5, and the intermediate pool 5 passes through the piping connection filter 6 with pump, is equally arranged in the clear water reserviors 7
There are blender 71 and PH meter 72, and it connects the discharge pipe with pump.
Also, as shown in Fig. 1, the efficient sedimentation tank 4 is also connected with sludge treatment equipment, specifically, at the sludge
Reason device includes the sewage sludge storage pond 8 that the sludge bucket of 4 bottom of efficient sedimentation tank is connected by the pipeline with sludge pump, the dirt
Mud storage 8 connects sludge dewatering equipment 9, the sludge dewatering for carrying out the concentration of sludge, by the pipeline with sludge pump
Machine 9 preferably uses Stacked sludge dewatering machine, naturally it is also possible to use other feasible dewaterers or device for separating mud and water.
When another External System work, for the ease of adding medicament, the reduction treatment pond 2 and/or flocculation basin 3 and/or clear
Pond 7 connects drug delivery device 1, and preferably they are separately connected a drug delivery device 10, and the drug delivery device 10 can be directly
The device for adding solid drugs is also possible to add the device of medical fluid, it is preferred that it is the device of adding liquid medical fluid.
As shown in Fig. 2, the drug delivery device 10 includes
Medicinal cupping 101, for configuring, loading medical fluid；
Medicine supplying pipe road 102 connects the medicinal cupping 101 and by medicinal liquid lead explosive barrel therein, the pipe on the medicine supplying pipe road 102
There is transparent section or observation window 1024 on road 1021；
An at least dosing branch 103 connects the medicine supplying pipe road 102, and controls on-off by valve 1031；
Return line 104 connects the medicine supplying pipe road 102 and medicinal cupping 101, controls on-off and itself and medicine supplying pipe by valve
The tie point 105 on road 102 is located at the tie point front end of dosing branch 103 Yu medicine supplying pipe road 102.
Wherein, the medicinal cupping 101 can be known various cylinders, tank structure, the medicinal cupping 101 include at least one into
Material mouth (not shown), the feed inlet can be used for adding various liquid or solids into bucket, such as feed inlet can lead to
Water inlet line connection water source is crossed, so as to realize automatic water-supply.
Also, in order to accelerate dissolution of the medicament in medicinal cupping 101, as shown in Fig. 2, it is additionally provided in the medicinal cupping 101
Blender 107, the blender 107 include the shaft 1072 extending into medicinal cupping, and the lower end of the shaft 1072 connects stirring
Blade 1071, the motor 1073 or similar dynamic structure of its rotation of the upper end connection driving.
As shown in Fig. 2, the medicine supplying pipe road 102 includes pipeline 1021, is disposed with Y type mistake on the pipeline 1021
Filter 1022, dosing pump 1023, valve 1025 and the transparent section or observation window 1024, also, the transparent section or observation window
1024 preferably using transparent PVC pipe or window and its front end for being located at the tie point 105, certainly, the transparent section or observation window
1024 can also use other transparent materials, such as transparent toughened glass or acrylic.
On the other hand, it such as only transparent section or observation window 1024, then needs to will result in one in this way by manually being observed
Fixed manpower loss, it is corresponding, as shown in Fig. 2, the circulation type sewage treatment medication delivery systems further include shooting angle just
To the image collecting device 108 of the transparent section or observation window 1024, described image acquisition device 108 be it is any have take pictures or
The equipment for shooting video capability, such as video camera or CCD, described image acquisition device 108 connect circulation type sewage treatment and supply
The control device of medicine system, also, described image acquisition device 108 starts work when the dosing pump 1023 works, thus
It can be analyzed by the image in collected transparent section or observation window, confirm the uninterrupted of liquid and with the presence or absence of solid
Body solvent.
As shown in Fig. 2, the rear end of the return line 104 and the tie point 105 on medicine supplying pipe road 102 is set its immediately
It is equipped with control valve 106, the control valve 106 connects the control device (not shown), thus passing through transparent section or sight
When examining window 1024 and seeing that medicament in medical fluid is not sufficiently dissolved, the control valve 106 can be turned off by control device, thus
Medical fluid is avoided to be continuously introduced in subsequent pipeline.
Also, as shown in Fig. 2, the return line 104 extends to the bottom section of the medicinal cupping 101, and is connected with
Water distributor 109, the water distributor 109 can be known various shape or structure, such as it can be shower shape, and make institute
State water outlet 1091 on water distributor 109 upward.
In addition, in order to understand the remaining liquid volume of medicinal cupping 101 in time so as to carry out the addition of medical fluid and more subject to
True knows whether medicament is substantially dissolved in solvent, therefore, shown in attached drawing 2, is provided in the medicinal cupping 1 including channel radio
The liquidometer 1010 and strength of fluid sensor 1010 of module are believed, so that control dosing pump stops when liquidometer 1010 triggers
Work and carry out filler in time, with the data that guarantee the stability of medical fluid supply and detect in strength of fluid sensor 1010 and
When the error of data built in control device is more than threshold value, control in the control valve 106 and/or each dosing branch 103 from
Dynamic valve 1031 turns off.
When work, solvent, such as water are added into the medicinal cupping 101 by feed inlet, then add medicament, subsequent start-up is stirred
It mixes device 107 to be stirred, is then turned off the control valve 106, and start the dosing pump 1023 and opening valve 1025 to make medical fluid
It flows back between medicine supplying pipe road 102, return line 104 and medicinal cupping 101, and confirms that solvent is by transparent section or observation window 1024
Whether the liquid inventory in no abundant dissolution and pipeline is normal, such as normal, when needing dosing, turns off the return line 104
On automatic valve, the automatic valve 1031 for opening the control valve 106 and corresponding dosing branch 103 is fed.
As shown in Fig. 2, it is also connected on the pipeline between the dosing pump 1023 and medicinal cupping 101 for by liquid pharmaceutical
The offloading pipeline 1030 being introduced into medicinal cupping 101, the offloading pipeline 1030 include pipeline, and the free end of the pipeline is equipped with fast
Connector 10301 and the on-off for passing through 10302 control piper of automatic discharging valve.
When carrying out liquid preparation unloading, the outlet end of ton bucket or groove tank car equipped with production liquid medicament is passed through into hose etc.
It is connected on the quick union 10301 of the offloading pipeline 1030, then opens automatic discharging valve 10302, start dosing pump
103, production liquid medicament is turned by circulating line into medicinal cupping 1 by dosing pump 103, to realize fast discharging, is improved
The convenience of operation.
In addition, the filter 6 can be sandfiltration pot and/or active carbon filtering tank, when it is active carbon filter, such as
Shown in attached drawing 3 comprising tank body 61, the tank body 61 includes all structures of regular activated carbon filter, such as the structure of backwash
The structure etc. just washed, is known technology herein, repeats no more, and the tank body 61 includes main body 614, the bottom of the main body 614
Portion is provided with liquid outlet 612 and its top, and it is hinged with coaxial upper cover 615, so that upper cover can open or close, when
The right upper cover 615 can also be pivotally connected in the one of the top of the main body 614 along the axis that 61 axis direction of tank body extends,
It is opened or closed to which upper cover 615 can horizontally rotate, is provided with handle 616 at the upper cover 615, it may be convenient to carry out
The opening of lid 615.
As shown in Fig. 3, inlet 611 is provided in the upper cover 615, the inlet 611 is connected with water distributor 66,
The water distributor 66 can be one and the approximate device of gondola water faucet structure, is also possible to a supervisor and divides equally the multiple of supervisor periphery
The structure that branch pipe with several water outlets is constituted, naturally it is also possible to be other feasible water distributors, to guarantee the equal of water distribution
Even property.
As shown in Fig. 3, the intracavity bottom of the tank body 61 is filled with quartz sand layer 62, to provide reliable support, institute
State and be covered with carbon leaching material 63 on quartz sand layer 62, and be provided between them mesh aperture less than quartz sand particle size and
The anti-mixed grid 64 of carbon leaching material particle size, the carbon leaching material 63 is located at anti-mixed grid 64 and anti-races expect strainer 65 it
Between, the anti-aperture for running material strainer 65 is less than the particle size of the carbon leaching material, and is located under the water distributor 66
Side.
Preferably, the height of the quartz sand layer 62 exists in 300mm ± 10mm, the packed height of the carbon leaching material 63
700 ± 10mm, and the 60% ± 5% of the height and the height for tank body 61 of the quartz sand layer 62 and carbon leaching material 63 lead to
Cross quartz sand layer, carbon leaching material height and they account for the design of tank body total height, to guarantee the filtering of carbon leaching material 63
Performance is best.
Further, the protection grid 64 and anti-race material strainer 65 can be two individual components, be also possible to a Sheng
The part for filling the filter bag of the carbon leaching material 63, when they are two separate structures, their mesh number is not less than 30
Mesh, and can be fixed respectively by the inner wall of sealing element and tank body 1, the inner wall of tank body 61 can also be fixed on by other forms
On, such as it is spirally connected；When they are the parts of filter bag, the filter bag is preferably polypropylene filter bag and mesh number is not less than 30
Mesh, stability with preferable chemical stability and in water, therefore in Sewage Environment, it is not easy to be corroded or damage.
When carrying out active carbon filter assembling, by taking filter bag as an example, quartz sand is first filled into the bottom of tank body, quartz
After sand is filled, filter bag is filled in tank body by top of the tank, then carbon leaching material is packed into filter bag, until activity
Charcoal filtrate is filled into after the height of setting and the sack of filter bag knots again.
Further, since conventional active carbon filter often uses bracket as support, but bracket is not easy to carry out
The overall movement of filter, therefore for the ease of the movement of active carbon filter, as shown in Fig. 3, at the bottom of the tank body 61
Portion is provided with one group of self-locking universal wheel 613, and the self-locking universal wheel 613 can be various feasible structures.
It is additionally provided on the outer wall of the tank body 61 as shown in Fig. 3 for the ease of carrying out the promotion of tank body 61 simultaneously
Handle 617, the handle 617 is located at the middle position of the expanded letter, and it is pivotally connected at tank wall, also, handle
617 pivot connection end is additionally provided with screw hole, be provided on the tank body with the matched arc-shaped hole of the through-hole, to pass through
The angle of corresponding position adjustable handle 617 of the through-hole in arc-shaped hole is adjusted, consequently facilitating the work people of different heights
Member's operation, increases the flexibility of application.
In addition, the height due to tank body is generally higher, it is not easy to directly carry out various operations from its top opening, therefore be
Convenient for the operation such as carrying out feeding from the top of the tank body, reloading, as shown in Fig. 3, on the outer wall of the tank body 61 also
It is provided with one group of step for being used to ascend a height from low to high 618.
When whole system works, it can be run by various control devices, such as PLC auto-control, to improve certainly
Dynamicization degree.
When handling sewage containing nitrate using the above-mentioned sewage disposal system based on nano zero valence iron comprising following mistake
Journey:
S00 collects the sewage containing nitrate in collecting pit 1.
S10, the nitrate in nano zero valence iron also raw sewage loaded by modification infusorial earth, concrete operations are as follows；
The sewage in collecting pit is introduced into reaction tank 2 by pumping, wherein the nitrate concentration in control reaction tank 2 in sewage
In 18-23, preferably 20mg/L, and make the pH value adjustment of sewage to neutrality, at this point, adding modified silicon into the reaction tank 2
The nano zero valence iron of diatomaceous earth load is reacted, and dosage is controlled in 5.1-5.2g/L, preferably in 5.14g/L, reaction, control
The mixing speed of blender in reaction tank processed is between 75-85rpm, preferably 80rpm, and the reaction time controls at 55-65 points
Between clock, preferably 1h
Wherein, added amount of chemical is related with the nitrate concentration in sewage, and above-mentioned dosage is determined according to pilot plant test
The best dosage, if dosage is very few, reaction not exclusively, preferable removal efficiency is unable to reach, if dosage mistake
Greatly, it causes medicament waste, increase operating cost；Meanwhile the setting of mixing speed is mainly for making medicament be in suspended state, with
Sewage is sufficiently mixed contact, so that reaction is more thorough, if mixing speed is too low, medicament is deposited on bottom of pond, cannot be abundant with sewage
Contact, causes reaction efficiency low.If mixing speed is too fast, increases power consumption, improves operating cost,.
In reaction process, the key reaction formula of the nano zero valence iron reduction nitrate is as follows:
In acid condition:
NO3 -+4Fe0+10H+→NH4 ++4Fe2++3H2O
In neutral conditions:
NO3 -+2.82Fe0+0.75Fe2++2.25H2O→NH4 ++1.19Fe3O4+0.5OH-
Also, in the system of nano zero valence iron removal nitrate, Fe0With reaction intermediate Fe2+It all can be used as reduction
Agent, by the nitrate reduction in water body at NH4 +、NO2 -Or N2,Fe0It is oxidized to Fe2+、Fe3+, give birth under neutral or basic conditions
At Fe (OH)2With Fe (OH)3；After reaction, the removal rate of above-mentioned nitrate from waste water is not less than 90%.
Meanwhile the nano zero valence iron of the modification infusorial earth load is prepared in accordance with the following steps, in oxygen free condition
Under prepared, and include the following steps:
S1 is modified diatomite by oxalic acid solution to obtain the modified diatomite of oxalic acid；
S2 is modified by the chitosan diatomite modified to oxalic acid, obtains chitin modified diatomite；
Chitin modified diatomite is added to FeSO by S34It is stirred in 7H2O solution after a certain period of time, to mixture
Isometric NaBH is slowly added dropwise in system4Solution is simultaneously reacted by following reaction formula,
Fe2++2BH4 -+6H2O=Fe0+2B(OH)3+7H2
After the reaction was completed, by be centrifugally separating to obtain modification infusorial earth load nano zero valence iron, and with deionized water with
It is dry after ethyl alcohol cleaning.
This preparation method is modified diatomite support material using oxalic acid and chitosan, on the one hand makes the hole of diatomite
Number and hole area increase；On the other hand make its surface with-OH and-NH2 group, be conducive to improve load of the diatomite to Fe
Ability, and on this basis, the nano zero valence iron of chitin modified tripolite loading has been prepared in situ using liquid phase reduction.
Specific preparation manipulation is as follows,
In the S1 step, 25.108g oxalic acid is taken to be dissolved in 1000mL deionized water, is then dissolved in 100g diatomite
It in above-mentioned oxalic acid solution, is filtered, washs, and dried at 80 DEG C after stirring 3h at 25 DEG C；Wherein, the mesh number of diatomite
Not less than 100 mesh, this is because the grain diameter of diatomite is excessive, and specific surface area is smaller if its mesh number is too small, it is unfavorable for nanometer
The load of Zero-valent Iron.
In the S2 step, 10g chitosan is taken to be slowly added into 1000mL oxalic acid solution, stirs 3h at 50 DEG C,
Then 100g is added thereto and stirs rear filtration washing for 24 hours at 30 DEG C through the modified diatomite of oxalic acid, and in 60 DEG C of vacuum items
It is dried for 24 hours under part.
In the S3 is rapid, the chitin modified diatomite of 11.2g is added to the FeSO47H2O solution of 100mL, institute
The quality for stating Fe in solution is and to make Fe in 2.24g2+: the mass ratio of CDt (chitin modified diatomite) is 1:5, at 25 DEG C
Stir 3h；Then, isometric NaBH is slowly added dropwise to mixed system with constant pressure funnel4Solution, to guarantee the molar ratio of B and Fe
=3:1) it is reacted, it is persistently stirred in reaction process, after to be titrated, continue mixing control in 30min or so, reacted
With 5000r/min centrifuge separation 10min or so after, the nano zero valence iron of modification infusorial earth load is obtained, deionization is finally used
Water and ethyl alcohol cleaning repeatedly, are dried in vacuo at 60 DEG C.
S20, the water outlet gravity flow in reduction reaction pond 2 enter flocculation basin 3, flocculant, such as PAM are added in flocculation basin, adds
Adding dosage is 0.1%, i.e., the mass ratio of flocculant in the solution is 0.1%, reacts 15-10min under blender effect, stirs
Machine revolving speed 40rpm, so that suspended particle size is further enlarged in waste water；After reaction, the sewage self-flowing in flocculation basin 3
Into efficient sedimentation tank 4, mud-water separation is carried out in pond, wherein sludge is along inclined plate sedimentation into sludge bucket, and supernatant is from water outlet
Mouth outflow flow to intermediate pool 5 certainly.
Supernatant liquid pump in intermediate pool 5 to filter 6 is filtered, further removes relatively fine suspended particulate by S30
Enter clear water reserviors after object.
S40, in clear water reserviors, under the stirring action of blender, by adding sodium hydroxide NaOH and sulfuric acid H2SO4It will
After the pH value adjustment to 6-9 of its interior water, emitted after final outflow water is up to standard through emptying pump.
S50, sludge after coagulating sedimentation is concentrated, transports outward disposition after dehydration, and pressing filtering liquid is back to collecting pit, dehydrated
Cheng Zhong adds polyacrylamide in sludge dewatering equipment, so as to increase the dehydration adequacy and dehydration efficiency of wet mud.
Still there are many embodiment, all technical sides formed using equivalents or equivalent transformation by the present invention
Case is within the scope of the present invention.
Claims (12)
1. the sewage disposal system based on nano zero valence iron, it is characterised in that: including sequentially connected
Reduction treatment pond (2) carries out sewage treatment in pond by the nano zero valence iron that the modification infusorial earth in it loads；
Flocculation basin (3) makes the pollutant in it in sewage flocculate by flocculant；
Efficient sedimentation tank (4) has the structure of mud, water separation in sewage therethrough；
Filter (6) has retention by the structure of the pollutant in the sewage in it；
Clear water reserviors (7), for by the pH value adjustment of the sewage in it to discharge standard.
2. the sewage disposal system according to claim 1 based on nano zero valence iron, it is characterised in that: the reduction treatment
Pond (2) and/or flocculation basin (3) and/or clear water reserviors (7) connection drug delivery device (10), the drug delivery device (10) include
Medicinal cupping (101), for configuring, loading medical fluid；
Medicine supplying pipe road (102), connects the medicinal cupping (101) and by medicinal liquid lead explosive barrel therein, the medicine supplying pipe road (102)
There is transparent section or observation window (1024) on pipeline (1021)；
An at least dosing branch (103) connects the medicine supplying pipe road (102), and controls on-off by valve；
Return line (104) connects the medicine supplying pipe road (102) and medicinal cupping (101), by valve control on-off and its with for medicine
The tie point (105) of pipeline (102) is located at the tie point front end of dosing branch (103) Yu medicine supplying pipe road (102), and close to its with
The rear end of the tie point on the medicine supplying pipe road is provided with open and close valve.
3. the sewage disposal system according to claim 1 based on nano zero valence iron, it is characterised in that: the filter
It (6) is sandfiltration pot and/or active carbon filter.
4. the sewage disposal system according to claim 1 based on nano zero valence iron, it is characterised in that: the filter
It (6) is active carbon filter, the active carbon filter includes tank body (61), and the intracavity bottom of the tank body (61) is filled with stone
Sand layer (62) is covered with carbon leaching material (63) on the quartz sand layer (62), and it is small that mesh aperture is provided between them
In anti-mixed grid (64) of quartz sand particle size and carbon leaching material particle size, the carbon leaching material (63) is located at anti-mixed
Between grid (64) and anti-race material strainer (65), the anti-aperture for running material strainer (65) is less than the particle of the carbon leaching material
Size.
5. the sewage disposal system according to claim 1 based on nano zero valence iron, it is characterised in that: further include with it is described
The sludge treatment equipment of efficient sedimentation tank (4) connection, the sludge treatment equipment connect collecting pit (1), and the collecting pit (1) is even
Connect reaction tank (2).
6. the preparation method of the nano zero valence iron of modification infusorial earth load, it is characterised in that: walked as follows under anaerobic
It is rapid:
S1 is modified diatomite by oxalic acid solution to obtain the modified diatomite of oxalic acid；
S2 is modified by the chitosan diatomite modified to oxalic acid, obtains chitin modified diatomite；
Chitin modified diatomite is added to FeSO by S34·7H2It is stirred in O solution after a certain period of time, it is slow to mixed system
Slowly isometric NaBH is added dropwise4Solution is simultaneously reacted by following reaction formula,
Fe2++2BH4 -+6H2O=Fe0+2B(OH)3+7H2
After the reaction was completed, by being centrifugally separating to obtain the nano zero valence iron of modification infusorial earth load, and with deionized water and ethyl alcohol
It is dry after cleaning.
7. the preparation method of the nano zero valence iron of modification infusorial earth load according to claim 6, it is characterised in that: in institute
It states in S1 step, stirring 3h in oxalic acid solution is added in the diatomite not less than 100 mesh and is modified.
8. the preparation method of the nano zero valence iron of modification infusorial earth load according to claim 6, it is characterised in that: in institute
It states in S2 step, chitosan is added in oxalic acid solution and obtains modified solution, it is modified that oxalic acid is then added into modified solution
Diatomite, the mass ratio of chitosan and oxalic acid modification infusorial earth is 1:10, after stirring, is filtered, washed and under vacuum conditions
It dries.
9. according to the preparation method of the nano zero valence iron of modification infusorial earth as claimed in claim 6 to 8 load, feature exists
In: in the S3 step, the Fe2+Mass ratio with chitin modified diatomite is 1:5.
10. the processing method of the sewage disposal system based on nano zero valence iron is used for sewage treatment containing nitrate comprising as follows
Process:
S10, in the nano zero valence iron also raw sewage for the modification infusorial earth load being prepared by claim 6-9 either method
Nitrate；
Sewage Jing Guo S10 step is realized mud-water separation by flocculation sedimentation by S20；
Sewage Jing Guo S20 step is filtered by S30；
S40, after the pH value adjustment to 6-9 of the water outlet of filter, qualified discharge.
11. the processing method of the sewage disposal system according to claim 10 based on nano zero valence iron, it is characterised in that:
In S10 step, into the sewage in reaction tank nitrate concentration in 18-23mg/L, the nanometer zero of modification infusorial earth load
For the dosage of valence iron in 5.1-5.2g/L, reaction, the mixing speed of blender is between 75-85rpm, and the reaction time is 55-
Between 65 minutes.
12. the processing method of the sewage disposal system according to claim 10 based on nano zero valence iron, it is characterised in that:
It further include S50, the sludge after coagulating sedimentation is concentrated, disposition is transported outward after dehydration, during the dehydration process, adds in sludge dewatering equipment
Addition polymerization acrylamide.
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| CN201811011574.3A CN109110960A (en) | 2018-08-31 | 2018-08-31 | The preparation method of the nano zero valence iron of sewage disposal system, processing method and modification infusorial earth load based on nano zero valence iron |
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