CN110240313A - The devices and methods therefor of Fenton processing refractory organic - Google Patents
The devices and methods therefor of Fenton processing refractory organic Download PDFInfo
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- 238000012545 processing Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000002351 wastewater Substances 0.000 claims abstract description 22
- 238000010992 reflux Methods 0.000 claims abstract description 21
- 238000005273 aeration Methods 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- -1 hydroxyl radical free radical Chemical class 0.000 claims abstract description 6
- 238000007086 side reaction Methods 0.000 claims abstract description 6
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 18
- 238000007254 oxidation reaction Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 10
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 10
- 239000002957 persistent organic pollutant Substances 0.000 claims description 10
- 230000015556 catabolic process Effects 0.000 claims description 8
- 238000006731 degradation reaction Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract description 31
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 4
- 239000013043 chemical agent Substances 0.000 abstract description 3
- 239000010786 composite waste Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 239000013067 intermediate product Substances 0.000 description 4
- 150000007524 organic acids Chemical class 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 150000002989 phenols Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- LRBQNJMCXXYXIU-QWKBTXIPSA-N gallotannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@H]2[C@@H]([C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-QWKBTXIPSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- NAOLWIGVYRIGTP-UHFFFAOYSA-N 1,3,5-trihydroxyanthracene-9,10-dione Chemical compound C1=CC(O)=C2C(=O)C3=CC(O)=CC(O)=C3C(=O)C2=C1 NAOLWIGVYRIGTP-UHFFFAOYSA-N 0.000 description 1
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 210000000051 wattle Anatomy 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
- C02F1/64—Heavy metal compounds of iron or manganese
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
Fenton handles the devices and methods therefor of refractory organic, is related to waste water chemical treatment method.Described device is equipped with Fenton pond body, baffle plate, processing water refluxing opening, dosing mouth, air diffuser disc, water inlet, effluent trough, spoil disposal drain and aeration supervisor.By reactor lattice and processing water reflux, realizes that water inlet pH value is down to 3~4, meet the Optimal pH condition of Fenton reaction.Reactor is divided into 3 lattice or more by baffle plate, and waste water is up and down reciprocatingly flowed along baffle plate, and waterpower mixing condition is good, avoids short stream, channel.End-o f-pipe -control water is back to first compartment, increases the extension rate of hydrogen peroxide and ferrous salt, weakens the side reaction of hydrogen peroxide and hydroxyl radical free radical, improves hydrogen peroxide utilization rate.Air diffuser disc exports compressed air, effective composite waste and chemical agent, and oxygen, which participates in reaction, can reduce hydrogen peroxide dosage.
Description
Technical field
The present invention relates to waste water chemical treatment methods, more particularly, to the device of Fenton processing refractory organic
And its method.
Background technique
Refractory organic is generally existing in industrial wastewater, such as coking, pharmacy, chemical industry, leather, papermaking, print
The waste water that the industries such as dye generate, the advanced treating of remaining organic pollutant has great market to need after two stage biological is handled
It asks.High-level oxidation technology is the effective means of generally acknowledged processing refractory organic, compared with other high-level oxidation technologies
(ozone oxidation, photochemical oxidation, ultrasound oxidation technology, electrochemical oxidation etc.), Fenton technology is because its is easy to operate, removal efficiency
It is high, reaction condition is mild etc., and reasons have higher application value (Pignatello J.J, Oliveros E, MacKay
A.Advanced oxidation processes for organic contaminant destruction based on
the Fenton reaction and related chemistry[J].Critical reviews in
Environmental science and technology, 2006 (36): 1-84), in actual sewage processing engineering
To application.But there is following defect: strong acid reaction condition, high dose hydrogen peroxide in Fenton in practical applications
It adds, hydrogen peroxide utilization rate is low, generates a large amount of iron containing sludge (Bello M.M, Raman A.A.A, Asghar A.Areview
on approaches for addressing the limitations of Fenton oxidation for
recalcitrant wastewater treatment[J].Process Safety and Environmental
Protection, 2019 (126): 119-140.), higher so as to cause processing cost, many enterprises are difficult to bear.In order to expand
For the pH condition of Fenton oxidation to neutral environment, basic ideas studied both at home and abroad at present are to add complexing agent, nano particle light
It is catalyzed (Subramanian G, Madras G.Introducing saccharic acid as an efficient iron
chelate to enhance photo-Fenton degradation of organic contaminants[J].Water
Research,2016(104):168-177；Wang Yanbin, Zhao Hongying, China, State of Zhao, wait to urge based on the heterophase Fenton of iron compound
Change oxidation technology [J] chemical industry progress, 2013 (25): 1246-1259.), the technical costs solved the problems, such as is excessively high, causes using valence
It is worth relatively low.
Chinese patent CN201510141425.9 discloses a kind of oil refining sewerage integrated combination processing system and processing method,
System includes biochemical treatment unit and Fenton fluidized bed processing unit；The biochemical treatment unit by discharge pipe line with it is described
The connection of Fenton fluidized bed processing unit；Biochemical treatment unit is through multi-stage biological processing system by the major part in oil refining sewerage
The draining of COD and most ammonia nitrogen removal, biochemical unit contains more refractory organic, fluidizes in Fenton
60% or more can be removed in bed processing unit, and does not contain pathogenic microorganisms in the water outlet after Fenton Strong oxdiative.
Summary of the invention
It is an object of the invention to exist to add a large amount of acid solution tune in practical engineering applications for existing Fenton technology
Section water inlet pH value, a large amount of hydrogen peroxide of consumption, lead to problems such as processing cost high, provide and do not need outer acid liquid adjusting inlet flow-patterm
Fenton processing refractory organic device.
Another object of the present invention is to provide the methods of Fenton processing refractory organic.
The device of the Fenton processing refractory organic is equipped with Fenton pond body, baffle plate, processing water reflux
Mouth, dosing mouth, air diffuser disc, water inlet, effluent trough, spoil disposal drain and aeration supervisor；By rolling in the Fenton pond body
Flowing plate is divided at least three compartment, and each compartment communicates with each other, and spoil disposal drain is located at cell bottom, and the air diffuser disc is set
In Fenton pool bottom, air diffuser disc is connected with aeration supervisor, and air diffuser disc is for exporting compressed air；The dosing
Mouth and water inlet are located at Fenton pond body inlet side bottom, and dosing mouth is equipped with 2, are respectively used to that H is added2O2With FeSO4It is molten
Liquid；Processing water refluxing opening is located at the Fenton pond body other side, and processing water refluxing opening takes back flow tube, and the return pipe other end taps into water
Mouthful；After waste water enters from the inlet Fenton pond body, each compartment, the place of termination compartments are flowed successively through in the form of pumping
Reason water is back to Fenton pond body first compartment through return pipe from processing water refluxing opening, and effluent trough is located at the top of Fenton pond body
End handles water through the water outlet of effluent trough and enters sedimentation basin.
The pond of the Fenton pond body can be 2~4m deeply.
The method of Fenton processing refractory organic the following steps are included:
1) waste water of the organic pollutant containing difficult for biological degradation after Biological Pretreatment is pumped into the pond Fenton, H from water inlet2O2
And FeSO4It is continuously added by dosing mouth, H2O2With Fe2+(pH 3~4) generates hydroxyl radical free radical OH in acid condition,
OH is with the rate oxidation persistent organic pollutants that are exceedingly fast；
In step 1), the optimal pH of the acid condition is 3~4；H2O2Dosage can be 1.2 × CODin~
1.5×CODin mg/L(CODin: inlet COD concentration), H2O2With Fe2+Molar ratio can be 20~50, H2O2With FeSO4Solution by
Two independent pipelines continuously add.
2) pond Fenton is divided at least three compartment by baffle plate, and waste water enters behind the pond Fenton with the shape that pumps
Formula flows successively through each compartment, and waterpower mixing condition is good, avoids short stream, channel；The processing water of termination compartments from processing water refluxing opening
Outflow is back to Fenton pond body first compartment through return pipe, is sufficiently mixed with the waste water of entrance, increases hydrogen peroxide and ferrous iron
The extension rate of salt weakens the side reaction of hydrogen peroxide and hydroxyl radical free radical, improves hydrogen peroxide utilization rate；
In step 2), the reflux ratio of the processing water can be 100%~200%.
3) air diffuser disc is mounted on the bottom of pond of each compartment in the pond Fenton, is stirred using compressed air, and air diffuser disc is defeated
Compressed air out, aeration disturbance ensure to add medicament and are sufficiently mixed with water inlet and recirculation water, reduce H2O2And Fe2+Consume OH pair
The generation of reaction improves the H for being used for oxidation of organic compounds2O2Utilization efficiency；It is aerated offer oxygen simultaneously, organic matter oxygen can be promoted
Change, reduces H2O2Usage amount；
In step 3), the aeration quantity of the aeration can be 3~6m3/(h·m2), 2~4h of reaction time；Water is handled through going out
Sink enters sedimentation basin, adds alkali to adjust completion iron cement and is separated from water；Aeration intensity gradually weakens along water (flow) direction, first compartment
Aeration intensity ensures to add medicament (H2O2With FeSO4) Quick uniform is scattered in liquid phase main body.
4) processing water enters sedimentation basin through effluent trough outflow, adds alkali to adjust completion iron cement and is separated from water.
The iron cement that the solubilised state molysite in water is added alkali, precipitating to be formed is handled, can be recycled in the pond Fenton.
The present invention does not need the Fenton technology that outer acid liquid adjusts inlet flow-patterm, using organic acid intermediate product be acidified into
Water does not need outer acid liquid and adjusts water inlet pH value, while reaction controlling is participated in reaction in partial oxidation stage and oxygen,
H can be greatly decreased2O2Usage amount, to significantly reduce operating cost.The present invention is processing organic pollutant containing difficult for biological degradation
Waste water provides a kind of efficient and economic technological means.
The present invention can effectively solve existing Fenton technology in engineer application because adding a large amount of acid solutions and H2O2Cause to handle
Costly defect mainly has advantage following prominent:
1, the present invention is based on the acidifications of organic acid intermediate product to intake, and using reactor lattice and processing water reflux, passes through height
Intensity aeration ensures to be sufficiently mixed in the 1st compartment with recirculation water and liquid phase main body into water, realizes that water inlet pH value is down to 3~4, full
The Optimal pH condition of sufficient Fenton reaction does not need outer acid liquid and adjusts water inlet pH value.
2, the present invention is stirred using compressed air, and effective composite waste and chemical agent reduce H2O2And Fe2+Consume OH
The generation of side reaction improves the H for being used for oxidation of organic compounds2O2Utilization efficiency.Aeration provides oxygen, can promote oxidation operation,
Instead of part H2O2Function, while reaction controlling is further reduced H in partial oxidation stage2O2Usage amount.
3, reactor is divided into 3 lattice or more using baffle plate by the present invention, and waste water is up and down reciprocatingly flowed along baffle plate, waterpower
Mixing condition is good, avoids short stream, channel.The characteristics of independent compartment is thoroughly mixed formula, whole pulling flow type is presented in streamflow regime, helps
Intensified response rate improves treatment effect.
Detailed description of the invention
Fig. 1 is the structure composition schematic diagram of the device of the Fenton processing refractory organic；
Fig. 2 is not need outer acid liquid and adjust the Fenton of inlet flow-patterm to handle the generation acidity comparison diagrams of several phenols；
Fig. 3 is not need outer acid liquid and adjust the Fenton of inlet flow-patterm to handle the COD removal rate comparison diagrams of several phenols；
Fig. 4 is not need H when outer acid liquid adjusts the Fenton processing phenol of inlet flow-patterm2O2Dosage to COD removal rate and
H2O2The influence curve figure of utilization rate；
Fig. 5 is not need H when outer acid liquid adjusts the Fenton processing phenol of inlet flow-patterm2O2Dosage to generate acidity and
BOD5The influence curve figure of/COD.
Specific embodiment
Following embodiment will the present invention is further illustrated in conjunction with attached drawing.
As shown in Figure 1, the device of the Fenton processing refractory organic is equipped with Fenton pond body 1, baffle plate
2, water refluxing opening 3, dosing mouth 4, air diffuser disc 5, water inlet 6, effluent trough 7, spoil disposal drain 8 and aeration supervisor 9 are handled；Institute
It states Fenton pond body 1 and at least three compartment is divided by baffle plate 2, spoil disposal drain 8 is located at cell bottom, the air diffuser disc 5
It is located at 1 bottom of Fenton pond body, air diffuser disc 5 is connected with aeration supervisor 9, and air diffuser disc is for exporting compressed air；Institute
It states dosing mouth 4 and water inlet 6 is located at 1 inlet side bottom of Fenton pond body, dosing mouth 4 is equipped with 2, is respectively used to that H is added2O2
With FeSO4Solution；Processing water refluxing opening 3 is located at 1 other side of Fenton pond body, and processing water refluxing opening 3 takes back flow tube, and return pipe is another
One end taps into the mouth of a river 6；Waste water from water inlet 6 enter Fenton pond body 1 after, flowed successively through in the form of pumping respectively every
The processing water of room, portion distal end compartment is back to 1 first compartment of Fenton pond body through return pipe from processing water refluxing opening 3, is discharged
Slot 7 is located at the upper end of Fenton pond body 1, handles water through the water outlet of effluent trough 7 and enters sedimentation basin (being not drawn into figure).
Compartment in Fenton pond body 1 communicates with each other, 2~4m of Chi Shen.
Waste water is up and down reciprocatingly flowed along baffle plate, and first compartment volume should meet reaction time >=30min, generation it is organic
Sour intermediate product acidification water inlet.H2O2With FeSO4Solution, water inlet enter reactor by first compartment bottom.Waste water hybrid mode is adopted
It is stirred with compressed air.
The present invention is a kind of side for not needing outer acid liquid and adjusting the Fenton processing refractory organic of inlet flow-patterm
Method, comprising the following steps:
1. the waste water of the organic pollutant containing difficult for biological degradation through Biological Pretreatment is pumped into the pond Fenton, based in organic acid
Between product acidification water inlet, by reactor lattice and processing water reflux, realize water inlet pH value be down to 3~4.H2O2And FeSO4It is leaning on
It is continuously added at nearly waste water inlet, H2O2With Fe2+Hydroxyl radical free radical OH is generated in acid condition, and OH is with the rate oxygen that is exceedingly fast
Change degradable organic pollutant.
2. the pond Fenton is divided into several compartments by baffle plate, waste water flows successively through each compartment in the form of pumping,
Reactor end-o f-pipe -control water is back to reactor first compartment, is sufficiently mixed with water inlet.
3. air diffuser disc is mounted on the bottom of pond of each compartment in the pond Fenton, aeration disturbance ensures to add medicament and water inlet and returns
Flowing water is sufficiently mixed, and reduces H2O2And Fe2+The generation of OH side reaction is consumed, the H for being used for oxidation of organic compounds is improved2O2Utilize effect
Rate.It is aerated offer oxygen simultaneously, oxidation operation can be promoted, reduces H2O2Usage amount.
Enter sedimentation basin through effluent trough 4. handling water, adds alkali to adjust completion iron cement and be separated from water, iron cement can be in the pond Fenton
It is recycled.
Embodiment 1: several phenols of Fenton degradation that outer acid liquid adjusts inlet flow-patterm are not needed
As shown in Figures 2 and 3, several phenolic substancess (phenol, tannic acid, Bai Danning, wattle extract, quebracho tannin) is chosen
Verify the technical feasibility of the present apparatus, the results showed that it can be realized under initial neutral and alkaline condition using apparatus of the present invention,
Effectively degradation is using a variety of phenols as the persistent organic pollutants of representative for Fenton reaction, and reaction process pH is down to 3~4, favorably
It reacts and carries out in best Fenton, COD removal rate is between 40%~70%.As shown in Figures 4 and 5, according to different H2O2Dosage pair
COD removal rate, H2O2Utilization efficiency generates acidity, processing water biodegradability (BOD5/ COD) effect tendency, best H2O2It adds
Amount may be configured as 0.6 times of theoretical dosage, i.e. 1.2 × CODin(CODin: inlet COD concentration), the novel Fenton system at this time
With highest H2O2Utilization efficiency can substantially reduce hydrogen peroxide dosage, to be substantially reduced operating cost.
The present invention is to be pumped into not needing outer acid liquid containing difficult for biological degradation organic pollutant wastewater after Biological Pretreatment
The Fenton processing unit for adjusting inlet flow-patterm is passed through Fenton pond body (reactor) based on the acidification water inlet of organic acid intermediate product
Lattice and processing water reflux, realize that water inlet pH value is down to 3~4, meet the Optimal pH condition of Fenton reaction.Baffle plate will
Fenton pond body is divided into 3 lattice or more, and waste water is up and down reciprocatingly flowed along baffle plate, and waterpower mixing condition is good, avoids short stream, ditch
Stream.The part processing water of termination compartments is back to the first lattice of reactor, increases the extension rate of hydrogen peroxide and ferrous salt, weakens
The side reaction of hydrogen peroxide and hydroxyl radical free radical improves hydrogen peroxide utilization rate.Air diffuser disc exports compressed air, effectively mixed
Waste water and chemical agent are closed, oxygen, which participates in reaction, can reduce hydrogen peroxide dosage.Using above-mentioned apparatus, largely solve
Existing Fenton processing unit needs acid adding to adjust water inlet pH value, saves acid solution throwing device, and oxygen participates in reaction and reduced
Hydrogen oxide dosage, is effectively reduced operating cost.
Claims (7)
- The device of 1.Fenton processing refractory organic, it is characterised in that be equipped with Fenton pond body, baffle plate, processing water Refluxing opening, dosing mouth, air diffuser disc, water inlet, effluent trough, spoil disposal drain and aeration supervisor；In the Fenton pond body At least three compartment is divided by baffle plate, each compartment communicates with each other, and spoil disposal drain is located at cell bottom, the air diffusion Disk is located at Fenton pool bottom, and air diffuser disc is connected with aeration supervisor, and air diffuser disc is for exporting compressed air；It is described Dosing mouth and water inlet are located at Fenton pond body inlet side bottom, and dosing mouth is equipped with 2, for being separately added into H2O2With FeSO4 Solution；Processing water refluxing opening is located at the Fenton pond body other side, and processing water refluxing opening takes back flow tube, and the return pipe other end taps into water Mouthful；After waste water enters from the inlet Fenton pond body, each compartment, the place of termination compartments are flowed successively through in the form of pumping Reason water is back to Fenton pond body first compartment through return pipe from processing water refluxing opening, and effluent trough is located at the top of Fenton pond body End handles water through the water outlet of effluent trough and enters sedimentation basin.
- 2. the device of Fenton processing refractory organic as described in claim 1, it is characterised in that the pond Fenton The pond depth of body is 2~4m.
- The method that 3.Fenton handles refractory organic handles difficult biology drop using Fenton as described in claim 1 Solve the device of organic matter, it is characterised in that the described method comprises the following steps:1) waste water of the organic pollutant containing difficult for biological degradation after Biological Pretreatment is pumped into the pond Fenton, H from water inlet2O2And FeSO4It is continuously added by dosing mouth, H2O2With Fe2+Hydroxyl radical free radical OH is generated in acid condition, and OH is with the rate that is exceedingly fast Aoxidize persistent organic pollutants；2) pond Fenton is divided at least three compartment by baffle plate, waste water enter behind the pond Fenton in the form of pumping according to It is secondary to flow through each compartment；Reactor end-o f-pipe -control water from processing water refluxing opening outflow through return pipe be back to Fenton pond body first every Room is sufficiently mixed with the waste water of entrance；3) air diffuser disc is mounted on the bottom of pond of each compartment in the pond Fenton, is stirred using compressed air, air diffuser disc output pressure Contracting air, aeration disturbance ensure to add medicament and are sufficiently mixed with water inlet and recirculation water, reduce H2O2And Fe2+Consume OH side reaction Generation, improve be used for oxidation of organic compounds H2O2Utilization efficiency；Offer oxygen is provided simultaneously, promotes oxidation operation, is reduced H2O2Usage amount；4) processing water enters sedimentation basin through effluent trough outflow, adds alkali to adjust completion iron cement and is separated from water.
- 4. the method for Fenton processing refractory organic as claimed in claim 3, it is characterised in that in step 1), institute The pH value for stating acid condition is 3~4.
- 5. the method for Fenton processing refractory organic as claimed in claim 3, it is characterised in that in step 1), institute State H2O2Dosage be 1.2 × CODin~1.5 × CODinMg/L, CODin: inlet COD concentration, H2O2With Fe2+Molar ratio For 20~50, H2O2With FeSO4Solution is continuously added by two independent pipelines.
- 6. the method for Fenton processing refractory organic as claimed in claim 3, it is characterised in that in step 2), institute The reflux ratio for stating processing water is 100%~200%.
- 7. the method for Fenton processing refractory organic as claimed in claim 3, it is characterised in that in step 3), institute The aeration quantity for stating aeration is 3~6m3/(h·m2), 2~4h of reaction time.
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| CN110759628A (en) * | 2019-10-31 | 2020-02-07 | 葛洲坝中固科技股份有限公司 | Organic sludge integrated rapid treatment system |
| CN111285555A (en) * | 2020-03-24 | 2020-06-16 | 山东高科联合环保科学研究院有限公司 | Fenton and biological oxidation combined process and device with low medicament addition |
| CN112759105A (en) * | 2019-10-21 | 2021-05-07 | 中国石油化工股份有限公司 | Method for selectively removing thiocyanate in nitrile-containing wastewater |
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