CN103755097B - Advanced oxidation-biological treatment device for non-biodegradable waste water - Google Patents
Advanced oxidation-biological treatment device for non-biodegradable waste water Download PDFInfo
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Abstract
The invention relates to an advanced oxidation-biological treatment device for non-biodegradable waste water. The device comprises a baffle plate Fenton reactor (6), a precipitating pond (12), a baffle plate anaerobic pond (15) and a contact oxidization pond (18). Waste water to be treated flows through each reaction pond of the baffle plate Fenton reactor in sequence, reacts and enters the precipitating pond for precipitating, supernate in the precipitating pond enters each compartment of the baffle plate anaerobic pond in sequence for undergoing anaerobic digestion, water undergoing anaerobic treatment in the baffle plate anaerobic pond enters the contact oxidation pond for undergoing aerobic treatment, treated effluent enters an oblique-tube precipitating pond, and sludge undergoing secondary precipitation in the oblique-tube precipitating pond returns to the foremost end of the baffle plate anaerobic pond through a sludge reflux pump to realize reduction of the residual sludge, and treated water is stored in the reclaimed water pond. Compared with the prior art, the advanced oxidation-biological treatment device has the advantages of high agent use efficiency, low energy consumption, simple structure and remarkable increase of the sludge digesting efficiency and the gas yield.
Description
Technical field
The invention belongs to environmental engineering and sewage treatment project field, especially relate to a kind of using Fenton oxidation as pre-treatment, in conjunction with anaerobic and aerobic biological treatment, the new device of process waste water difficult for biological degradation and technique.
Background technology
In recent years, along with developing rapidly of industry, kind and the quantity discharged of trade effluent are increasing, and composition is more complicated, containing much toxicity and Persistent organic pollutants in the trade effluents such as agricultural chemicals, printing and dyeing, medicine and chemical industry, as phenol, polychlorobiphenyl, polycyclic aromatic hydrocarbons etc.Waste water not only complicated, organic concentration is high, biological degradability is poor, intractability is increasing, particularly serious to the harm of environment, and some pollutent also has the effects such as carcinogenic, teratogenesis, mutagenesis.On the other hand, along with improving constantly of people's environmental consciousness, the emission request of people to trade effluent is also more and more higher, and traditional physics, chemistry and biological effluent treatment method have been difficult to meet this requirement.Some waste water, as chemical plant wastewater, dyeing waste water, coking chemical waste water etc., after treatment, lingering section refractory organic in water, cannot remove simply by the physical chemistry method such as flocculation sediment or air supporting.
Waste water difficult for biological degradation often has following characteristics simultaneously: the COD concentration of (1) waste water is high: have up to several ten thousand even hundreds of thousands of mg/L, once entering in water body, oxygen in water will be consumed in a large number, causing water body severe depletion of oxygen; (2) biodegradable performance is poor: containing a large amount of baroque organism in waste water, as the anthraquinone in waste water from dyestuff, biphenyl type organic etc., pole difficult for biological degradation; (3) water quality is unstable: by Influence of production, and water-quality constituents is complicated and change is large, containing a large amount of raw materials for production, intermediate, by product in waste water.As at bleaching and dyeing house's waste water, Different periods produces different products, and the color of Different periods waste water is all different, can detect tens kinds of organic compound in waste water, time and in strong basicity, time and in neutral or acid.
At present, simple, that biological degradability good, concentration the is lower waste water of major part composition can by the optimum combination qualified discharge of existing treatment technology, and the waste water treatment of many biological degradability differences is operated in and technically has very large difficulty, although some waste water can reach emission standard by kinds of processes combination aftertreatment, but because technique is too complicated, processing cost is too high, restive, is not easily accepted by producer.
Current present situation, adopts certain monotechnics to solve the pollution problem of such waste water, economical and be technically all impossible.The material must removed according to the character of waste water, quantity, needs and emission standard, select several effective treatment process optimum combination, just can reach improvement requirement.For the waste water of difficult for biological degradation, before biochemical, pretreated method is a lot, mainly contains, as flocculation sediment, air supporting, light electrolysis, chemical oxidation and anaerobic hydrolysis-acidification etc.Character according to pollutent contained in waste water can select suitable technology, as the refinery water containing Chuck Steak, adopts oil removal technique before biochemical; For the waste water that suspended matter is more, coagulating sedimentation or air supporting can be adopted to remove the technique such as part toxicant or suspended substance; To containing the more waste water of dissolved organic matter, useful chemical oxidation style, as light electrolysis, wet oxidation process, supercritical water oxidation method, Ozonation, oxychlorination method, photocatalytic oxidation and Fenton oxidation method etc.On the whole, Fenton oxidation method, as pre-treatment, is one of more feasible and both economical processing mode.
1894, British H.J.H.Fenton found to adopt Fe
2+/ H
2o
2system can be oxidized gas chromatography.In honor of the combination of ferrous salt and hydrogen peroxide is called Fenton reagent to descendant by him, and its energy the efficient oxidation removes the hardly degraded organic substance that conventional waste water treatment technology cannot be removed, and its essence is Fe
2+catalyzing and decomposing H
2o
2, generate the hydroxyl radical free radical (OH) of strong oxidizing property, OH can make it degrade with most of organism effect, and the larger molecular organics in waste water is resolved into small-molecule substance, can lifting waste water biodegradability.But the homogeneous phase Fenton system of routine also has weak point, and main manifestations is, H
2o
2utilization ratio low and produce a large amount of iron containing sludge, make processing cost high and cause secondary pollution.During Fenton follow-up anaerobic technique process organic waste water, if containing certain density vitriol in waste water, sulphate reducing bacteria (SRB) will inevitably be bred, carry out sulfate reduction, disadvantageous effect is brought to normal anaerobic digestion, sulphate reducing bacteria (SRB) and methane-producing bacteria (MPB) are competed organic substrates and reduce the anaerobic digestion methane phase efficiency of waste water, restraining effect produced to MPB and causes the deterioration of anaerobic technique, causing the collapse of anaerobic reaction system even sometimes.
Summary of the invention
Object of the present invention is exactly defect in order to overcome prior art and deficiency, provides a kind of advanced oxidation-Biochemical method device of waste water difficult for biological degradation.
Object of the present invention can be achieved through the following technical solutions: a kind of advanced oxidation-Biochemical method device of waste water difficult for biological degradation, and it is characterized in that, this device comprises:
Traverse baffle Fenton reactor, this traverse baffle Fenton reactor becomes 5 reaction tanks by baffle for separating, be respectively: acid adding pond, add ferrous pond, Fenton main reaction pond, add alkali pond and add PAM pond, be wherein provided with means for feeding acid in acid adding pond, add in ferrous pond to arrange and add setting ferrous device, Fenton main reaction pond in and add H
2o
2device, add in alkali pond adder-subtractor is set, add in PAM pond arrange add flocculation agent PAM device; Described Fenton main reaction pond, add alkali pond and add bottom PAM pond and be equipped with blast aeration mouth, each blast aeration mouth all connects Aeration fan;
Settling tank, this settling tank connects traverse baffle Fenton reactor;
Traverse baffle anaerobic pond, this traverse baffle anaerobic pond is connected with the water outlet of settling tank, and traverse baffle anaerobic pond becomes 6 compartments by baffle for separating, and each compartment top is provided with collecting methane pipeline, and each compartment is built with 3 D elastic filler;
Contact-oxidation pool, be connected with the water outlet of traverse baffle anaerobic pond, contact-oxidation pool water outlet enters tube settler, and the mud through tube settler secondary sedimentation passes through sludge reflux pump diffraction current plate anaerobic pond foremost, realize residual sludge reduction, the water after process is stored in middle pond.
5 flow deflectors being fixed on its top and 4 dividing plates be fixed on bottom it are provided with in described traverse baffle Fenton reactor, gap is provided with between each flow deflector and traverse baffle Fenton reactor bottom, be provided with gap between each dividing plate and traverse baffle Fenton reactor head, flow deflector is adjacent forming reactions pond between dividing plate;
6 flow deflectors being fixed on its top and 5 dividing plates be fixed on bottom it are provided with in described traverse baffle anaerobic pond, gap is provided with between bottom each flow deflector and traverse baffle anaerobic pond, be provided with gap between each dividing plate and traverse baffle anaerobic pond top, flow deflector is adjacent between dividing plate and forms compartment;
Each flow deflector is the flap that angle is 120 °.
Described means for feeding acid comprises acid solution storage tank, and connects pipeline and the flow deflector in acid solution storage tank and acid adding pond; Acid solution wherein in acid solution storage tank is the mixing acid of nitric acid or nitric acid and sulfuric acid, is controlled the add-on of acid solution, make COD/SO by means for feeding acid
4 2-addition controls more than 3, and after acid adding, pH is at 3-4.
The described ferrous device that adds comprises ferrous storage tank, and connects ferrous storage tank and the pipeline and the flow deflector that add ferrous pond, and the mixture of Iron nitrate or Iron nitrate and ferrous sulfate is wherein housed in ferrous storage tank.
Add mineral filler in described Fenton main reaction pond, described mineral filler comprises haydite, waste active carbon or plastic waste, as inert support.
In described Fenton main reaction pond, the upflow velocity of liquid level controls within 10-60m/h, mainly through pond body cross-sectional area and highly carry out state modulator.
Described Aeration fan is roots blower, by Aeration fan to Fenton main reaction pond, add alkali pond and add PAM pond aeration, utilize oxygen improve Fenton treatment effect and save added amount of chemical, and play the fluid effect stirring and improve filler.
After each reaction tank that pending waste water flows through traverse baffle Fenton reactor successively reacts, enter settling tank precipitation, the press filtration of settling tank iron containing sludge part is transported outward, the iron containing sludge that settling tank produces is back to acid adding pond by reflux pump by part, in acid adding pond, low pH dissolves molysite, and recycle iron is as catalyzer; Each compartment that supernatant liquor in settling tank enters traverse baffle anaerobic pond more successively carries out anaerobic digestion.
The excess sludge produced bottom described last compartment of traverse baffle anaerobic pond refluxes into the first compartment by sludge pump, again carry out anaerobic digestion, the biogas that each compartment of traverse baffle anaerobic pond produces is used as clean energy by the collection of top collecting methane pipeline.
Flexible filler in described contact-oxidation pool, by the flexible pipe air-supply aeration of roots blower to contact-oxidation pool bottom.
The present invention be directed to the deficiency of existing Fenton reactor and technique, use a kind of novel all-in-one heterogeneous traverse baffle Fenton flow reactor, after sulfate process is conducive to improving Fenton oxidation less simultaneously, the treatment effect of subsequent anaerobic digestion effect and whole biological treatment waste water difficult for biological degradation, the mud of tube settler with sludge reflux pump blowback anaerobic pond foremost, realize residual sludge reduction.
Compared with prior art, the present invention has the following advantages.
(1) traverse baffle Fenton reactor of the present invention can add medicament continuously, is convenient to use with other unit associations;
(2) multiple spot adds medicament respectively and can improve treatment effect and medicament service efficiency, and the introducing of inert support can reduce the dosage of ferrous salt and the generation of iron containing sludge;
(3) the Fenton reactor of traverse baffle configuration and anaerobic reactor can reduce the consumption of energy, realize the flowing of material and be uniformly distributed by waterpower difference of elevation;
(4) this technique of few sulfate radical use, on the basis ensureing Fenton oxidation effect, can improve the effect of anaerobic digestion;
(5) in Fenton reactor three pond bodies, aeration can play stirring, reduce H
2o
2the object of reagent consumption and raising oxidation effectiveness;
(6) each unit rear end sludge reflux is to front end, can improve processing efficiency, and realize sludge reduction.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of excess sludge Fenton oxidation coupling anaerobic digestion.
In figure: 1, means for feeding acid, 2, add ferrous device, 3, add H
2o
2device, 4, adder-subtractor, 5, add flocculation agent PAM device, 6, traverse baffle Fenton reactor, 7, acid adding pond, 8, add ferrous pond, 9, Fenton main reaction pond, 10, add alkali pond, 11, PAM pond is added, 12, settling tank, 13, blower fan, 14, reflux pump, 15, traverse baffle anaerobic digester, 16, collecting methane pipeline, 17, sludge pump, 18: contact-oxidation pool, 19: tube settler, 20: middle pond, 21: roots blower, 22: sludge reflux pump.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Embodiment is implemented premised on the present invention program, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, advanced oxidation-Biochemical method device of waste water difficult for biological degradation, this device mainly comprises three big units and forms: first module oxidation reactor and traverse baffle Fenton reactor 6, second unit traverse baffle anaerobic pond 15,3rd unit contact-oxidation pool 18, wherein:
Traverse baffle Fenton reactor 6, be provided with 5 flow deflectors being fixed on its top and 4 dividing plates be fixed on bottom it in described traverse baffle Fenton reactor 6 and traverse baffle Fenton reactor 6 is separated into 5 reaction tanks, gap is provided with between bottom each flow deflector and traverse baffle Fenton reactor 6, gap is provided with between each dividing plate and traverse baffle Fenton reactor 6 top, flow deflector is adjacent forming reactions pond between dividing plate, and each flow deflector is the flap that angle is 120 °; 5 reaction tanks, are respectively: acid adding pond 7, add ferrous pond 8, Fenton main reaction pond 9, add alkali pond 10 and add PAM pond 11, are wherein provided with means for feeding acid 1 in acid adding pond 7, add in ferrous pond 8 to arrange to add in ferrous device 2, Fenton main reaction pond 9 to arrange and add H
2o
2device 3, add in alkali pond 10 adder-subtractor 4 is set, add PAM pond 11 in arrange and add flocculation agent PAM device 5; Described Fenton main reaction pond 9, add alkali pond 10 and add bottom PAM pond 11 and be equipped with blast aeration mouth, each blast aeration mouth all connects Aeration fan 13;
Settling tank 12, this settling tank 12 connects traverse baffle Fenton reactor 6;
Traverse baffle anaerobic pond 15, traverse baffle anaerobic pond 15 is connected with the water outlet of settling tank 12, be provided with 6 flow deflectors being fixed on its top and 5 dividing plates be fixed on bottom it in described traverse baffle anaerobic pond 15 and traverse baffle anaerobic pond 15 is separated into 6 compartments, gap is provided with between bottom each flow deflector and traverse baffle anaerobic pond 15, be provided with gap between each dividing plate and traverse baffle anaerobic pond 15 top, flow deflector is adjacent between dividing plate and forms compartment; Each flow deflector is the flap that angle is 120 °.Each compartment top is provided with collecting methane pipeline 16, and each compartment is built with 3 D elastic filler; The excess sludge produced bottom described last compartment of traverse baffle anaerobic pond 15 refluxes into the first compartment by sludge pump 17, again carry out anaerobic digestion, the biogas of each compartment generation of traverse baffle anaerobic pond 15 is collected by top collecting methane pipeline 16 and is used as clean energy.
Contact-oxidation pool 18, flexible filler in contact-oxidation pool 18, by the flexible pipe air-supply aeration of roots blower 21 to contact-oxidation pool 18 bottom.Contact-oxidation pool 18 is connected with the water outlet of traverse baffle anaerobic pond 15, contact-oxidation pool 18 water outlet enters tube settler 19, mud through tube settler 19 secondary sedimentation passes through sludge reflux pump 22 diffraction current plate anaerobic pond 15 foremost, realize residual sludge reduction, the water after process is stored in middle pond 20.
Described means for feeding acid 1 comprises acid solution storage tank, and connects pipeline and the flow deflector in acid solution storage tank and acid adding pond 7; Acid solution wherein in acid solution storage tank is the mixing acid of nitric acid or nitric acid and sulfuric acid, is controlled the add-on of acid solution, make COD/SO by means for feeding acid 1
4 2-addition controls more than 3, and after acid adding, pH is at 3-4.
The described ferrous device 2 that adds comprises ferrous storage tank, and connects ferrous storage tank and the pipeline and the flow deflector that add ferrous pond 8, and the mixture of Iron nitrate or Iron nitrate and ferrous sulfate is wherein housed in ferrous storage tank.
Add mineral filler in described Fenton main reaction pond 9, described mineral filler comprises haydite, waste active carbon or plastic waste, as inert support.
In described Fenton main reaction pond 9, the upflow velocity of liquid level controls within 10-60m/h, mainly through pond body cross-sectional area and highly carry out state modulator.
Described Aeration fan 13 is roots blower, by Aeration fan 13 to Fenton main reaction pond 9, add alkali pond 10 and add PAM pond 11 aeration, utilize oxygen improve Fenton treatment effect and save added amount of chemical, and play the fluid effect stirring and improve filler.
After each reaction tank that pending waste water flows through traverse baffle Fenton reactor 6 successively reacts, enter settling tank 12 to precipitate, the press filtration of settling tank 12 iron containing sludge part is transported outward, the iron containing sludge that settling tank produces is back to acid adding pond 7 by reflux pump 14 by part, in acid adding pond 7, low pH dissolves molysite, and recycle iron is as catalyzer; Each compartment that supernatant liquor in settling tank 12 enters traverse baffle anaerobic pond 15 more successively carries out anaerobic digestion, water after traverse baffle anaerobic pond 15 anaerobic treatment enters contact-oxidation pool 18 and carries out aerobic treatment, water outlet after process enters tube settler 19, mud through tube settler 19 secondary sedimentation passes through sludge reflux pump 22 diffraction current plate anaerobic pond 15 foremost, realize residual sludge reduction, the water after process is stored in middle pond 20.
Embodiment 1
Advanced oxidation-Biochemical method the device of this waste water difficult for biological degradation, process COD concentration is 850mg/L dye house effluents, and this device comprises following processing step:
(1) waste water that need process enters traverse baffle Fenton reactor 6 from the well pump that catchments.First waste water enters acid adding pond 7.Open means for feeding acid 1, nitric acid/sulfuric acid (1: 1) mixing acid is added in front end, acid adding pond, regulate pH to control about 3.0, adding Iron nitrate 50mg/L with adding ferrous device 2 to adding ferrous pond 8, at Fenton main reaction pond 9 entrance end, passing through H
2o
2throwing device 3 adds 350mg/L H
2o
2, reaction 30min in Fenton main reaction pond 9.After reacting completely, enter and add alkali pond 10, with adder-subtractor 4 add NaOH regulate pH to 9.0, after add front end, PAM pond 11 with add PAM device 5 add add 2mg/L negatively charged ion PAM flocculate after, flow into settling tank 12.Part is entered acid adding pond 7, with recycle by the iron content deposition reflux pump 14 bottom settling tank 12.Simultaneously Aeration fan 13 continuously to Fenton main reaction pond 9, add alkali pond 10 and add aeration in pond, PAM pond 11.
(2) water outlet of Fenton reactor enters anaerobic baffled reaction device 15, and it has 6 compartments, and the first compartment is entered in excess sludge sludge pump 17 blowback produced bottom last compartment, supplements anaerobic sludge.Its hydraulic detention time is 12h.Biogas can be done clean energy after being collected by each compartment collected overhead pipeline 16 and use;
(3) anaerobic effluent enters into contact-oxidation pool 18, flexible filler in it, and by the flexible pipe aeration of roots blower 21 to bottom, pond, water outlet enters tube settler 19, ensures effluent quality.Settling tank 19 mud blowback anaerobic pond 15 foremost, realizes residual sludge reduction;
(4) hydraulic detention time of traverse baffle Fenton reactor 6 is about 50min, and anaerobic baffled reaction device 15 hydraulic detention time is 12h, and contact-oxidation pool 18 hydraulic detention time is 18h.Water outlet COD is down to below 90mg/L, and colourity is less than 50.
Embodiment 2
Advanced oxidation-Biochemical method the device of this waste water difficult for biological degradation, process COD concentration is 1980mg/L wastewater from chemical industry, and this device comprises following processing step:
(1) sewage that need process enters traverse baffle Fenton reactor 6 from the well pump that catchments.First waste water enters acid adding pond 7.Open means for feeding acid 1, nitric acid/sulfuric acid (1: 1) mixing acid is added in front end, acid adding pond, regulate pH to control about 3.5, adding Iron nitrate 160mg/L with adding ferrous device 2 to adding ferrous pond 8, at Fenton main reaction pond 9 entrance end, passing through H
2o
2throwing device 3 adds 1000mg/L H
2o
2, reaction 50min in Fenton main reaction pond 9.After reacting completely, enter and add alkali pond 10, with adder-subtractor 4 add NaOH regulate pH to 9.5, after add front end, PAM pond 11 with add PAM device 5 add 3mg/L negatively charged ion PAM flocculate after, flow into settling tank 12.Part is entered acid adding pond 7, with recycle by the iron content deposition reflux pump 14 bottom settling tank 12.Simultaneously Aeration fan 13 continuously to Fenton main reaction pond 9, add alkali pond 10 and add aeration in pond, PAM pond 11.
(2) water outlet of Fenton reactor enters anaerobic baffled reaction device 15, and it has 6 compartments, and the first compartment is entered in excess sludge sludge pump 17 blowback produced bottom last compartment, supplements anaerobic sludge.Its hydraulic detention time is 18h.Biogas can be done clean energy after being collected by each compartment collected overhead pipeline 16 and use;
(3) anaerobic effluent enters into contact-oxidation pool 18, flexible filler in it, and by the flexible pipe aeration of roots blower 21 to bottom, pond, water outlet enters tube settler 19, ensures effluent quality.Settling tank 19 mud blowback anaerobic pond 15 foremost, realizes residual sludge reduction;
(4) hydraulic detention time of traverse baffle Fenton reactor 6 is about 70min, and anaerobic baffled reaction device 15 hydraulic detention time is 18h, and contact-oxidation pool 18 hydraulic detention time is 24h.Water outlet COD is down to below 120mg/L.
Embodiment 3
Advanced oxidation-Biochemical method the device of this waste water difficult for biological degradation, process COD concentration is 4572mg/L waste water in pharmaceutical plants, and this device comprises following processing step:
(1) sewage that need process enters traverse baffle Fenton reactor 6 from the well pump that catchments.First waste water enters acid adding pond 7.Open means for feeding acid 1, nitric acid/sulfuric acid (1: 1) mixing acid is added in front end, acid adding pond, regulate pH to control about 3.5, adding Iron nitrate 500mg/L with adding ferrous device 2 to adding ferrous pond 8, at Fenton main reaction pond 9 entrance end, passing through H
2o
2throwing device 3 adds 3000mg/L H
2o
2, reaction 80min in Fenton main reaction pond 9.After reacting completely, enter and add alkali pond 10, with adder-subtractor 4 add NaOH regulate pH to 8.5, after add front end, PAM pond 11 with add PAM device 5 add 4mg/L negatively charged ion PAM flocculate after, flow into settling tank 12.Part is entered acid adding pond 7, with recycle by the iron content deposition reflux pump 14 bottom settling tank 12.Simultaneously Aeration fan 13 continuously to Fenton main reaction pond 9, add alkali pond 10 and add aeration in pond, PAM pond 11.
(2) water outlet of Fenton reactor enters anaerobic baffled reaction device 15, and it has 6 compartments, and the first compartment is entered in excess sludge sludge pump 17 blowback produced bottom last compartment, supplements anaerobic sludge.Its hydraulic detention time is 24h.Biogas can be done clean energy after being collected by each compartment collected overhead pipeline 16 and use;
(3) anaerobic effluent enters into contact-oxidation pool 18, flexible filler in it, and by the flexible pipe aeration of roots blower 21 to bottom, pond, water outlet enters tube settler 19, ensures effluent quality.Tube settler 19 mud blowback anaerobic pond 15 foremost, realizes residual sludge reduction;
(4) hydraulic detention time of traverse baffle Fenton reactor 6 is about 120min, and anaerobic baffled reaction device 15 hydraulic detention time is 24h, and contact-oxidation pool 18 hydraulic detention time is 36h.Water outlet COD is down to below 150mg/L.
Claims (10)
1. advanced oxidation-Biochemical method device of waste water difficult for biological degradation, it is characterized in that, this device comprises:
Traverse baffle Fenton reactor (6), this traverse baffle Fenton reactor (6) becomes 5 reaction tanks by baffle for separating, be respectively: acid adding pond (7), add ferrous pond (8), Fenton main reaction pond (9), add alkali pond (10) and add PAM pond (11), be wherein provided with means for feeding acid (1) in acid adding pond (7), add ferrous pond (8) in arrange to add in ferrous device (2), Fenton main reaction pond (9) to arrange and add H
2o
2device (3), add in alkali pond (10) and adder-subtractor (4) is set, adds in PAM pond (11) to arrange and add flocculation agent PAM device (5); Described Fenton main reaction pond (9), add alkali pond (10) and add PAM pond (11) bottom be equipped with blast aeration mouth, each blast aeration mouth all connects Aeration fan (13);
Settling tank (12), this settling tank (12) connects traverse baffle Fenton reactor (6);
Traverse baffle anaerobic pond (15), this traverse baffle anaerobic pond (15) is connected with the water outlet of settling tank (12), traverse baffle anaerobic pond (15) becomes 6 compartments by baffle for separating, each compartment top is provided with collecting methane pipeline (16), and each compartment is built with 3 D elastic filler;
Contact-oxidation pool (18), be connected with the water outlet of traverse baffle anaerobic pond (15), contact-oxidation pool (18) water outlet enters tube settler (19), mud through tube settler (19) secondary sedimentation passes through sludge reflux pump (22) diffraction current plate anaerobic pond (15) foremost, realize residual sludge reduction, the water after process is stored in middle pond (20).
2. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, 5 flow deflectors being fixed on its top and 4 dividing plates be fixed on bottom it are provided with in described traverse baffle Fenton reactor (6), gap is provided with between each flow deflector and traverse baffle Fenton reactor (6) bottom, be provided with gap between each dividing plate and traverse baffle Fenton reactor (6) top, flow deflector is adjacent forming reactions pond between dividing plate;
6 flow deflectors being fixed on its top and 5 dividing plates be fixed on bottom it are provided with in described traverse baffle anaerobic pond (15), gap is provided with between each flow deflector and traverse baffle anaerobic pond (15) bottom, be provided with gap between each dividing plate and traverse baffle anaerobic pond (15) top, flow deflector is adjacent between dividing plate and forms compartment;
Each flow deflector is the flap that angle is 120 °.
3. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, described means for feeding acid (1) comprises acid solution storage tank, and connects pipeline and the flow deflector of acid solution storage tank and acid adding pond (7); Acid solution wherein in acid solution storage tank is the mixing acid of nitric acid or nitric acid and sulfuric acid, is controlled the add-on of acid solution, make COD/SO by means for feeding acid (1)
4 2-addition controls more than 3, and after acid adding, pH is at 3-4.
4. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, the described ferrous device (2) that adds comprises ferrous storage tank, and connect ferrous storage tank and the pipeline and the flow deflector that add ferrous pond (8), the mixture of Iron nitrate or Iron nitrate and ferrous sulfate is wherein housed in ferrous storage tank.
5. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, mineral filler is added in described Fenton main reaction pond (9), described mineral filler comprises haydite, waste active carbon or plastic waste, as inert support.
6. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, the upflow velocity of described Fenton main reaction pond (9) interior liquid level controls within 10-60m/h, mainly through pond body cross-sectional area and highly carry out state modulator.
7. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, described Aeration fan (13) is roots blower, by Aeration fan (13) to Fenton main reaction pond (9), add alkali pond (10) and add PAM pond (11) aeration, utilize oxygen improve Fenton treatment effect and save added amount of chemical, and play the fluid effect stirring and improve filler.
8. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, after each reaction tank that pending waste water flows through traverse baffle Fenton reactor (6) successively reacts, enter settling tank (12) precipitation, the press filtration of settling tank (12) iron containing sludge part is transported outward, the iron containing sludge that settling tank produces is back to acid adding pond (7) by reflux pump (14) by part, in acid adding pond (7), low pH dissolves molysite, and recycle iron is as catalyzer; Each compartment that supernatant liquor in settling tank (12) enters traverse baffle anaerobic pond (15) more successively carries out anaerobic digestion.
9. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, the excess sludge produced bottom described traverse baffle anaerobic pond (15) last compartment refluxes into the first compartment by sludge pump (17), again carry out anaerobic digestion, the biogas that each compartment of traverse baffle anaerobic pond (15) produces is used as clean energy by top collecting methane pipeline (16) collection.
10. advanced oxidation-Biochemical method the device of a kind of waste water difficult for biological degradation according to claim 1, it is characterized in that, flexible filler in described contact-oxidation pool (18), by the flexible pipe air-supply aeration of roots blower (21) to contact-oxidation pool (18) bottom, the mud of tube settler (19) with sludge reflux pump (22) blowback anaerobic pond (15) foremost, realize residual sludge reduction.
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| CN103991988A (en) * | 2014-06-10 | 2014-08-20 | 江苏拓森环保设备工程有限公司 | Integrated energy-saving and efficient Fenton reaction system |
| CN104310716A (en) * | 2014-11-03 | 2015-01-28 | 中国建筑第四工程局有限公司 | Wastewater treatment method |
| CN104944697B (en) * | 2015-06-12 | 2017-04-12 | 浙江大学 | Microbial electrolysis cell-Fenton combined treatment device and process for treating furniture production wastewater |
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