CN105461056A - Micro-aerobic-anaerobic intersected horizontal flow hydrolysis acidification tank and treatment method of petrochemical wastewater - Google Patents
Micro-aerobic-anaerobic intersected horizontal flow hydrolysis acidification tank and treatment method of petrochemical wastewater Download PDFInfo
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- CN105461056A CN105461056A CN201510789769.0A CN201510789769A CN105461056A CN 105461056 A CN105461056 A CN 105461056A CN 201510789769 A CN201510789769 A CN 201510789769A CN 105461056 A CN105461056 A CN 105461056A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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- 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
- C02F2101/32—Hydrocarbons, e.g. oil
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- 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
- C02F2101/34—Organic compounds containing oxygen
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- 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
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a micro-aerobic-anaerobic intersected horizontal flow hydrolysis acidification tank. The tank has a reciprocating bending-flowing type multi-corridor structure, and comprise a plurality of parallel corridors; the plurality of corridors are separated by partition walls (4); water inlets of two adjacent corridors are in staggered distribution, and located on two sides of the longitudinal direction of the corridor; and a mechanical agitation and an aeration contact zone are in staggered arrangement in each corridor. The invention also discloses a treatment method of petrochemical wastewater by using the micro-aerobic-anaerobic intersected horizontal flow hydrolysis acidification tank treatment. The method can improve biodegradability and degradability of the petrochemical wastewater, and the micro-aerobic-anaerobic intersected horizontal flow hydrolysis acidification tank structure is reasonable and cost-effective.
Description
Technical field
The present invention relates to field of industrial waste water treatment, particularly relate to the treatment process of a kind of micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool and petrochemical wastewater.
Background technology
Petroleum chemical industry is the mainstay industry of China, is the lifeblood of national economy, for industrial and agricultural production and people's lives provide basic raw material and energy safeguard.The key industry of petrochemical industry Ye Shi China Wastewater Pollutant discharge, according to Environmental statistics annual report in 2013, in industrial trade, petroleum chemical industry wastewater discharge is number two, COD quantity discharged is number three, ammonia nitrogen, petroleum-type, prussiate rank the first, volatile phenol is number two, and the contribution rate that quantity discharged accounts for national key industry is respectively 13.2%, 9.9%, 31.0%, 17.6%, 27.6% and 9.9%.Petroleum chemical industry is the key industry that China's Wastewater Pollutant discharges particularly toxic pollutant discharge.
Petrochemical wastewater is for main raw material with oil, Sweet natural gas, by the waste water of the art production process China discharges such as cracking, refining, fractionation, reformation and synthesis, the waste water that multiple device combines discharge, its principal pollutant have the organic pollutants such as petroleum-type, organic acid, alcohol, amine, phenol, ether, ketone, aldehyde, hydrocarbon, phenol, amine, cyanogen type organic general toxicity are comparatively large, and some also has severe toxicity.Because Pollutants in Wastewater kind is many, concentration is high, variation water quality is large, and have the organism of multiple difficult for biological degradation, the intractability of petrochemical wastewater is larger.
Petrochemical wastewater generally adopts biologic treating technique as core process, and its advantage is that flow process is short, and equipment is simple, and processing costs is low.But due to the high toxicity of petrochemical wastewater, generally need to carry out corresponding pre-treatment.Acidication is the first stage of anaerobic digestion, completed by facultative acidication bacterium, can effectively transform and degrade some toxicant and be difficult to biodegradable material, aromatic hydrocarbon and heterogeneous ring compound open loop cracking etc. can be realized, that improves waste water can natural disposition, is effective pretreatment stage of biological treatment.
Summary of the invention
The technical problem to be solved in the present invention is the pretreated problem of petrochemical wastewater acidication containing a large amount of poisonous hardly degraded organic substance and vitriol, for improving its biodegradability and degradation property, there is provided a kind of rational in infrastructure, micro-oxygen-anaerobism of economical and efficient and science intersects flat flow hydrolysis acidification pool and adopt the method for this hydrolysis acidification pool process petrochemical wastewater.
The vitriol of petrochemical wastewater generally containing higher concentration, in anaerobic hydrolysis-acidification process, the vitriol of high density can be reduced to H
2s.H
2s is poisonous foul gas, corroding metal equipment, and easily causes Aerobic biological process system sludge to expand, and affects its stability.Suitable inhibiting sulfate reduction is one of key improving petrochemical wastewater acidication pretreating effect.Based on this, the invention discloses a kind of micro-oxygen-anaerobism and intersect flat flow hydrolysis acidification pool and adopt the method for this device process petrochemical wastewater.
A kind of micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool, described micro-oxygen-anaerobism intersects flat flow hydrolysis acidification pool for coming and going the many gallery structures of deflector type, be made up of multiple gallery be arranged in parallel, partition wall is adopted to separate between multiple described gallery, the water inlet of adjacent two described gallerys is interspersed, lay respectively at the two ends of described gallery length direction, in each described gallery, be staggeredly equipped with mechanical stirring district and aeration zone of action.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, be fixed with submersible agitator in described mechanical stirring district, the bottom of described aeration zone of action is provided with aeration endless tube aerator, and top is provided with suspension type semi soft packing.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, 0.2m at the bottom of described aeration endless tube aerator mounting height distance pond, the height of described suspension type semi soft packing is 2.0m, 2.0m at the bottom of its distance from bottom pond, adopts suspension type semi soft packing.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, 2.0m at the bottom of described submersible agitator distance pond, in each described gallery, described submersible agitator is fixed on the described partition wall in the left side of water (flow) direction, and the angle of the angle between described submersible agitator and horizontal plane and described submersible agitator and water (flow) direction is 30 °.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, the wide 6.5-8.0m of described gallery, long 30m, depth of water 5.0-6.0m; Horizontal throw between described submersible agitator and adjacent described suspension type semi soft packing is 6.5 ~ 8m.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, also comprise sealing cover body, cover on described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool and form seal cavity, described sealing cover body is connected with gas treatment equipment by collection and confinement of gases pipeline.
Micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool, wherein, one end of first described gallery is provided with water intake, the water inlet of second described gallery is arranged on the other end of first described gallery; In the end one end of a described gallery is water inlet, and the other end is provided with wastewater effluent mouth.
The method of the micro-oxygen described in employing-anaerobism intersection flat flow hydrolysis acidification pool process petrochemical wastewater, comprises the steps:
Pending petrochemical wastewater enters described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool by water intake, enter each gallery successively, after the micro-oxygen-anaerobic environment repeatedly intersected that mechanical stirring district and aeration zone of action are formed, biochemical, the degradation property of petrochemical wastewater are improved, toxicity is cut down, and the petrochemical wastewater after process is discharged by wastewater effluent mouth.
The method of process petrochemical wastewater of the present invention, wherein, in the process of described process petrochemical wastewater, gas-water ratio is 0.25-0.5:1, and hydraulic detention time is 12-24h.
The method of process petrochemical wastewater of the present invention, wherein, the power input of described submersible agitator is 0.005-0.007kW/t waste water.
In the present invention, dissolved oxygen is best between 0.2-0.3mg/L.
The micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool difference from prior art is:
Adopt the method for the micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool process petrochemical wastewater, the poisonous hardly degraded organic substance of higher concentration and the feature of high-sulfate is contained based in petrochemical wastewater, adopt segmented treatment method, micro-oxygen is realized by the mode of aeration, unified employing high-efficient treatment device process after the organism stripping of part toxic and volatile in waste water can being collected on the one hand, improve processing efficiency, the reduction of vitriol can be suppressed on the other hand, reduce toxic gas H
2the generation of S, also can reduce the murder by poisoning to wastewater treatment process, improves the efficiency of acidication; Anaerobic zone and micro-oxygen interval, every setting, can give full play to the efficiency of acidication.Prove through research trial, adopt set-up mode of the present invention, gas-water ratio and the residence time, after petrochemical wastewater process, water outlet biodegradability and degradation property are improved, and toxicity is cut down, and adopt other parameter cannot reach effect of the present invention.
Compared with prior art, the present invention has following characteristics:
1) multistage micro-aerated space is set in hydrolysis acidification pool, controls suitable gas-water ratio, unified process after the organism stripping of toxic and volatile in waste water can being collected, reduce its murder by poisoning to acidication facultative bacteria.
2) micro-oxygen environment can suppress the reduction of vitriol in petrochemical wastewater, reduces toxic gas H
2the generation of S, reduces its murder by poisoning to bacteriums such as acidications, improves the efficiency of reaction.
3) mechanical stirring and aeration can ensure the abundant mixing of muddy water, and mass-transfer efficiency is high, is beneficial to reaction.
4) region arranges rationally, and pond body structure is simple, and equipment is installed easily, is beneficial to the transformation that water factory has Lao Chi body.
5) rationally, reserved mechanical stirring district and aeration zone of action distance can ensure the muddy water mixed effect in two regions, and overall power consumption is less for agitator mounted angle and power input.
6) rational height of suspension type semi soft packing and agitator is reasonable, can ensure muddy water mixed effect, can prevent again pool bottom sludge from depositing, and be beneficial to desilting.
Know-why of the present invention is as follows:
Acidication bacterium is facultative bacteria, its growth does not need the condition of strictly anaerobic, the present invention utilizes this feature, by the micro-aerobic aeration zone of action being divided into spaced apart mechanical stirring anaerobic zone and strict control aeration rate of hydrolysis acidification pool novelty, dissolved oxygen controls at 0.2-0.3mg/L, can't have influence on the effect of acidication.The existence of aeration and stirring can improve the effect of muddy water mixing in hydrolysis acidification pool, prevents mud from depositing, and improves mass-transfer efficiency, makes reactive behavior higher, improve the effect of acidication.The existence of limited aeration, on the one hand can the organism of toxic and volatile of stripping petrochemical wastewater middle and high concentration, organism is unified process after gas gathering system is collected, reduce the toxic action of these organism to microorganism in waste water, on the other hand suitable dissolved oxygen exists can the activity of inhibiting sulfate reduction bacterium, suppress the reduction of vitriol, reduce toxic gas H
2the generation of S, reduces its murder by poisoning to bacteriums such as acidications, improves the efficiency of reaction, also has provide protection simultaneously to the corrosion of cement main body and hardware in the body of pond.
Below in conjunction with accompanying drawing, micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool is described further.
Accompanying drawing explanation
Fig. 1 is the micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool two dimensional structure schematic diagram;
Fig. 2 is the micro-oxygen of the present invention-anaerobism intersection flat flow hydrolysis acidification pool cross-sectional view;
Fig. 3 is the embodiment of the present invention 5 Inlet and outlet water COD changing conditions;
Fig. 4 is the embodiment of the present invention 5 Inlet and outlet water BOD
5/ COD changing conditions;
Fig. 5 is the embodiment of the present invention 5 Inlet and outlet water VFA changing conditions.
Embodiment
Embodiment 1
As depicted in figs. 1 and 2, a kind of micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool, for the many gallery structures of round deflector type, be made up of multiple gallery be arranged in parallel, partition wall 4 is adopted to separate between multiple described gallery, the water inlet of adjacent two described gallerys is interspersed, and lays respectively at the two ends of described gallery length direction, is staggeredly equipped with mechanical stirring district and aeration zone of action in each described gallery.
Submersible agitator 1 is fixed with in described mechanical stirring district, the bottom of described aeration zone of action is provided with aeration endless tube aerator 3, top is provided with suspension type semi soft packing 2,0.2m at the bottom of described aeration endless tube aerator 3 mounting height distance pond, the height of described suspension type semi soft packing 2 is 2.0m, 2.0m at the bottom of its distance from bottom pond, adopts suspension type semi soft packing.
Described submersible agitator 1 is apart from 2.0m at the bottom of pond, in each described gallery, described submersible agitator 1 is fixed on the described partition wall 4 in the left side of water (flow) direction, angle between described submersible agitator 1 and horizontal plane and described submersible agitator 1 are 30 ° with the angle of water (flow) direction, the wide 6.5-8.0m of described gallery, long 30m, depth of water 5.0-6.0m; Horizontal throw between described submersible agitator 1 and adjacent described suspension type semi soft packing 2 is 6.5 ~ 8m.
Micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool also comprises sealing cover body, cover on described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool and form seal cavity, described sealing cover body is connected with gas treatment equipment (CN102895867B) by collection and confinement of gases pipeline.One end of first described gallery is provided with water intake, and the water inlet of second described gallery is arranged on the other end of first described gallery; In the end one end of a described gallery is water inlet, and the other end is provided with wastewater effluent mouth.
In the present invention, the quantity of concrete mechanical stirring district and aeration zone of action, the quantity of gallery are all arranged according to the situation of concrete petrochemical wastewater.
Embodiment 2
Adopt the method for described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool process petrochemical wastewater, comprise the steps:
Pending petrochemical wastewater enters described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool by water intake, enter each gallery successively, after the micro-oxygen-anaerobic environment repeatedly intersected that mechanical stirring district and aeration zone of action are formed, biochemical, the degradation property of petrochemical wastewater are improved, toxicity is cut down, and the petrochemical wastewater after process is discharged by wastewater effluent mouth.In the process of described process petrochemical wastewater, gas-water ratio is 0.25:1, and hydraulic detention time is 12h, and the power input of described submersible agitator 1 is 0.005kW/t waste water.
Embodiment 3
Be with the difference of embodiment 2: gas-water ratio is 0.5:1, hydraulic detention time is 24h, and the power input of described submersible agitator 1 is 0.007kW/t waste water, and other are with embodiment 2.
Embodiment 4
Be with the difference of embodiment 2: gas-water ratio is 0.4:1, hydraulic detention time is 20h, and the power input of described submersible agitator 1 is 0.006kW/t waste water, and other are with embodiment 2.
Embodiment 5
Certain large-scale petrochemical industrial park petrochemical wastewater, COD between 490.3 ~ 673.2mg/L, SO
4 2-between 779.0-904.7mg/L.Adopt micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool process, pond body gallery is between 7.0-8.0m, and the long 30m of wall scroll gallery, be divided into 84 anaerobism mechanical stirring districts and 84 aeration zone of action, dissolved oxygen controls at 0.2-0.35mg/L, and hydraulic detention time is 24h.Operation result shows, the average removal rate of COD is 11.7%, and water outlet is compared with water inlet, BOD
5/ COD improves 12.4%, and Vfa Concentration increases 23.0%, water outlet sulfate concentration average out to 930.7mg/L.In COD, the degradation property of waste water improves 30%, and water outlet is beneficial to follow-up aerobic biological treatment process.Implement treatment effect data of the present invention and see Fig. 3 ~ Fig. 5.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (10)
1. micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: described micro-oxygen-anaerobism intersects flat flow hydrolysis acidification pool for coming and going the many gallery structures of deflector type, be made up of multiple gallery be arranged in parallel, partition wall (4) is adopted to separate between multiple described gallery, the water inlet of adjacent two described gallerys is interspersed, lay respectively at the two ends of described gallery length direction, in each described gallery, be staggeredly equipped with mechanical stirring district and aeration zone of action.
2. micro-oxygen according to claim 1-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: be fixed with submersible agitator (1) in described mechanical stirring district, the bottom of described aeration zone of action is provided with aeration endless tube aerator (3), and top is provided with suspension type semi soft packing (2).
3. micro-oxygen according to claim 2-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: 0.2m at the bottom of described aeration endless tube aerator (3) mounting height distance pond, the height of described suspension type semi soft packing (2) is 2.0m, 2.0m at the bottom of its distance from bottom pond, adopts suspension type semi soft packing.
4. micro-oxygen according to claim 3-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: 2.0m at the bottom of described submersible agitator (1) distance pond, in each described gallery, described submersible agitator (1) is fixed on the described partition wall (4) in the left side of water (flow) direction, and the angle between described submersible agitator (1) and horizontal plane and described submersible agitator (1) are 30 ° with the angle of water (flow) direction.
5. micro-oxygen according to claim 4-anaerobism intersection flat flow hydrolysis acidification pool, is characterized in that: the wide 6.5-8.0m of described gallery, long 30m, depth of water 5.0-6.0m; Horizontal throw between described submersible agitator (1) and adjacent described suspension type semi soft packing (2) is 6.5 ~ 8m.
6. micro-oxygen according to claim 5-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: also comprise sealing cover body, cover on described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool and form seal cavity, described sealing cover body is connected with gas treatment equipment by collection and confinement of gases pipeline.
7. micro-oxygen according to claim 6-anaerobism intersection flat flow hydrolysis acidification pool, it is characterized in that: one end of first described gallery is provided with water intake, the water inlet of second described gallery is arranged on the other end of first described gallery; In the end one end of a described gallery is water inlet, and the other end is provided with wastewater effluent mouth.
8. adopt the method for the micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool process petrochemical wastewater in claim 1 ~ 7 described in any one, it is characterized in that: comprise the steps:
Pending petrochemical wastewater enters described micro-oxygen-anaerobism intersection flat flow hydrolysis acidification pool by water intake, enter each gallery successively, after the micro-oxygen-anaerobic environment repeatedly intersected that mechanical stirring district and aeration zone of action are formed, biochemical, the degradation property of petrochemical wastewater are improved, toxicity is cut down, and the petrochemical wastewater after process is discharged by wastewater effluent mouth.
9. the method for process petrochemical wastewater according to claim 8, is characterized in that: in the process of described process petrochemical wastewater, and gas-water ratio is 0.25-0.5:1, and hydraulic detention time is 12-24h.
10. the method for process petrochemical wastewater according to claim 9, is characterized in that: the power input of described submersible agitator (1) is 0.005-0.007kW/t waste water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115745179B (en) * | 2022-11-29 | 2024-02-20 | 华夏碧水环保科技股份有限公司 | Dynamic hydrolysis acidification device for high-concentration sulfate wastewater |
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Application publication date: 20160406 |