CN104829045A - Method for treating high-concentration chemical wastewater - Google Patents
Method for treating high-concentration chemical wastewater Download PDFInfo
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- CN104829045A CN104829045A CN201510189634.0A CN201510189634A CN104829045A CN 104829045 A CN104829045 A CN 104829045A CN 201510189634 A CN201510189634 A CN 201510189634A CN 104829045 A CN104829045 A CN 104829045A
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Abstract
The invention discloses a method for treating high-concentration chemical wastewater. The method comprises a pre-treatment step, an up-flow type anaerobic sludge bed treatment step and a contact oxidation treatment step in sequence. The method has the innovation point that the pre-treatment step comprises an iron-carbon micro-electrolysis step and a coal/natural indirect liquidation oxidization step; the contact oxidation treatment step comprises an anaerobic treatment step and a two-stage aerobic treatment step; the first-stage aerobic treatment step in the two-stage aerobic treatment step comprises an anoxic and biochar-process activated sludge combined treatment step. According to the method for treating high-concentration chemical wastewater, the operation feasibility is improved, the labor intensity is reduced, the filler is enabled to be in a suspension state without being blocked and plugged by controlling the grain size of the filler and operation parameters of an aeration system and an inner circulating system, the iron powder and the carbon powder are released to the sewage in a facilitated mode, the gas phase, the liquid phase and the solid phase are completely contacted, and the treatment efficiency is improved.
Description
Technical field
The present invention relates to a kind of wastewater of chemical industry with high concentration treatment process, belong to field of industrial waste water treatment.
Background technology
Along with the demand of people to petroleum chemicals is increasing, the total scale in chemical plant, in continuous expansion, is also increasing year by year to the pressure of environment.Wastewater from chemical industry not only has the water quality characteristics of high CODCr, high toxicity and biodegradability difference, especially the comprehensive wastewater from chemical industry of chemical industrial park, originate wider, the chemical industry class related to is numerous, water quality and quantity fluctuation is larger, waste water composition is complicated and have uncertainty, there is the features such as potential of hydrogen is large, colourity is dark, high ammonia nitrogen, high salinity, levels of toxic substances are high, water quality and quantity changes greatly, biodegradability is poor mostly, conventional materialization and biochemical treatment are difficult to reach emission request, project completing the standard rate wretched insufficiency for a long time.High-concentration integrated chemical organic waste water becomes the improvement difficult problem that domestic and international environmental protection circle is generally acknowledged already, so researching and developing effective, economic waste water treatment technique is the key that chemical industrial park comprehensive wastewater successfully realizes focusing on.
Solve the problem, first need carry out pre-treatment to waste water, to improve its biodegradability.Be necessary to apply a kind of cheapness and method for oxidation that is effective, that improve biochemical carries out pre-treatment to this waste water, reduce subsequent biochemical technical load with this, thus reach the object of qualified discharge.For the comprehensive wastewater from chemical industry of complexity, its qualified discharge can be realized cost-effectively with the integrated technology that the strengthening materialization technology and senior biochemistry of removing biological inhibition are combined.
Summary of the invention
The object of the invention is to for deficiency of the prior art, a kind of wastewater of chemical industry with high concentration treatment process is provided, aim at and process high density, difficult degradation wastewater from chemical industry is developed, can guarantee that process stable water outlet is up to standard.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of wastewater of chemical industry with high concentration treatment process, comprise pre-treatment, up-flow anaerobic sludge blanket process and catalytic oxidation process successively, its innovative point is: described pre-treatment comprises Fe-C micro electrolysis and Fenton oxidation step; Described biochemical treatment comprises two-stage A/O treatment step; First step A/O step in described two-stage A/O step comprises double oxygen and charcoal method active sludge combined treatment, and second stage A/O step comprises acidication and catalytic oxidation combined treatment.
On this basis, described Fe-C micro electrolysis step is specially: joined by pending acid waste water in the reactor body being provided with filler support bracket, add homogeneous phase granular filler to mix and carry out micro-electrolysis reaction, wherein, when the add-on of homogeneous phase granular filler is waste water, the 4-6 of flow doubly.
On this basis, described Fenton oxidation step is: have employed fractional order reaction mode and be oxidized, and in oxidation pond, branch segmentation adds Fenton oxidation agent, 3 ~ 5 times of flow when the dosage of Fenton oxidation agent is waste water.
On this basis, described anaerobic treatment concrete steps are: sewage evenly enters from the bottom of reactor through water distribution system, and upwards flow through reaction zone and enter gas, solid, liquid disengaging zone, finally enter the settling region on up flow anaerobic sludge blanket reactor UASB top; In mixed solution, mud returns to reaction zone by action of gravity autoprecipitation district through three-phase separation area, and the biogas produced then discharges reactor by collection chamber through pipeline.
On this basis, described double oxygen and charcoal method active sludge combined treatment concrete steps as follows: first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, the particularly introducing of PACT activated sludge process, makes it stronger to the tolerance of waste water toxic material.
On this basis, described acidication and catalytic oxidation combined treatment concrete steps as follows: second stage AO runs under low stain concentration, low load condition, for the hardly degraded organic substance in waste water, extends contact time, ensure the degradation capability to it, ensure that final outflow water water conditioning is up to standard.
Beneficial effect of the present invention is as follows:
(1) the Fe-C micro electrolysis step in the inventive method, by the iron powder that is distributed in sewage with carbon dust with outside sewage outflow reactor, only need regularly to reactor additional fillers, and change filler without the need to clear pond, improve the conveniency of operation, reduce labour intensity, by controlling packing material size and aerating system, internal circulation system operating parameter, filler is made to be in suspended state, can not to lump blocking, be conducive in sewage, discharge iron powder and carbon dust, gas, liquid, solid three-phase is fully contacted, improve processing efficiency.
(2) coal in the inventive method/Sweet natural gas indirect liquefaction oxidation step, fractional order reaction pattern can form multiple reaction conditions along water (flow) direction, adapt to the miscellaneous feature of chemical industry Organic Pollutants in Wastewater, overall removal efficiency can be improved, reduce dosing, reduce running cost, need partly to arrange the specific aim catalyzer anchored on suspending carrier according to water quality, the removal effect of specific pollutant can be improved, can catalyst levels be reduced again simultaneously, cut the waste.
(3) in the anaerobic treatment in the inventive method, be can cultivate in reactor to form the good granule sludge of settling property, form the high Sludge Bed of sludge concentration, make it have a series of excellent service performances such as volumetric loading is high, sludge retention is effective, structure of reactor is compact.
(4) the acidication process in the inventive method, hydrolysis acidification pool utilizes the organic pollutant in anaerobism, aerobic-anaerobic microbe degradation of sewage, and the larger molecular organics of aerobic microbiological difficult degradation is converted into the small organic molecule (this is the main purpose arranging hydrolysis acidification pool in flow process) of easily degraded, improve the biodegradability energy of organic pollutant, so that the organic pollutant of the aerobic microbiological in subsequent oxidation pond comparatively fast and more thoroughly in degradation of sewage, be beneficial to the qualified discharge of final process water.
(5) the two-stage aerobic AO process in the inventive method, first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, particularly the introducing of PACT activated sludge process, make it stronger to the tolerance of waste water toxic material.Second stage AO runs under low stain concentration, low load condition, mainly for the hardly degraded organic substance in waste water, extends contact time, and ensures the degradation capability to it, ensures that final outflow water water conditioning is up to standard.
(6), in the inventive method, have employed anaerobism+two-stage AO technique.Anaerobism is pump circulation UASB technique, is to carry out improveing for wastewater from chemical industry specially on the basis of traditional UASB, has very high shock-resistant ability and treatment effect.First step AO is oxygen and the combination of PACT activated sludge process held concurrently, and is the effective treatment process for high concentrated organic wastewater.PACT technique, can for hardly degraded organic substance in waste water, and bio-toxicity material, metal ion etc. have stabilizes and increases treatment effect effect preferably.The large reflux ratio acidication of second stage AO and contact oxidation technology, A section improves the biodegradability energy of hardly degraded organic substance in waste water, and O section adopts underload, long mud age, some hardly degraded organic substances in wastewater from chemical industry can be degraded more thoroughly.
Accompanying drawing explanation
Be further detailed below in conjunction with the drawings and specific embodiments.
Fig. 1 is processing flow chart of the present invention.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is elaborated.
Embodiment 1
As shown in Figure 1: concrete treating processes is as follows:
A () waste water remove portion suspended substance after grid enters into equalizing tank, then enter into iron-carbon micro-electrolysis pond and carry out comprising microelectrolysis processing; 4 times of flow when the add-on of homogeneous phase granular filler is waste water.
B () then enters FT oxidation pond and carries out the oxidation of coal/Sweet natural gas indirect liquefaction, be specially: have employed fractional order reaction mode and be oxidized, in oxidation pond, branch segmentation adds Fenton oxidation agent, 3 ~ 5 times of flow when the dosage of Fenton oxidation agent is waste water.
C () enters into coagulative precipitation tank from FT oxidation pond waste water out, add the flocculation agent PAM of 0.1% concentration, the slag that precipitation produces and mud are transported in sludge thickener, sewage enters into pump circulation UASB pond and carries out anaerobic biological treatment, sewage evenly enters from the bottom of UASB reactor through water distribution system, and upwards flow through reaction zone and enter gas, solid, liquid disengaging zone, finally enter the settling region on up flow anaerobic sludge blanket reactor UASB top; In mixed solution, mud returns to reaction zone by action of gravity autoprecipitation district through three-phase separation area, and the biogas produced then discharges reactor by collection chamber through pipeline.
(d) and then from pump circulation UASB pond waste water out enter into oxygen compatibility pool and carry out holding concurrently and support and charcoal method active sludge combined treatment, hold concurrently oxygen and charcoal method active sludge combined treatment concrete steps as follows: first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, the particularly introducing of PACT activated sludge process, makes it stronger to the tolerance of waste water toxic material;
E waste water that () to support from holding concurrently pond out enters into PACT aeration tank, carries out Aerobic biological process, to remove the organism in sewage further; Wherein, arrange following parameter when Air Exposure: according to different quality situation, the BOD amount removed at this process section and ammonia nitrogen amount are to determine aeration rate.
F () waste water out from PACT aeration tank enters into medium sediment pool, precipitate through medium sediment pool;
G () enters into hydrolysis acidification pool and contact-oxidation pool successively from waste water out after medium sediment pool precipitation, be hydrolyzed acidification, acidication and catalytic oxidation combined treatment concrete steps as follows: second stage AO runs under low stain concentration, low load condition, for the hardly degraded organic substance in waste water, extend contact time, ensure the degradation capability to it, ensure that final outflow water water conditioning is up to standard.
H () enters into second pond from contact-oxidation pool waste water out, through sedimentation in secondary sedimentation tank, after precipitation, water outlet can qualified discharge, and the mud in sludge thickener, through processed, is transported to landfill yard landfill or burning outward.
Embodiment 2
On the basis of embodiment 1, (a) waste water remove portion suspended substance after grid enters into equalizing tank, then enters into iron-carbon micro-electrolysis pond and carry out comprising microelectrolysis processing; 6 times of flow when the add-on of homogeneous phase granular filler is waste water.
B () then enters FT oxidation pond and carries out the oxidation of coal/Sweet natural gas indirect liquefaction, be specially: have employed fractional order reaction mode and be oxidized, in oxidation pond, branch segmentation adds Fenton oxidation agent, 3 ~ 5 times of flow when the dosage of Fenton oxidation agent is waste water.
C () enters into coagulative precipitation tank from FT oxidation pond waste water out, add the flocculation agent PAM of 0.1% concentration, the slag that precipitation produces and mud are transported in sludge thickener, sewage enters into pump circulation UASB pond and carries out anaerobic biological treatment, sewage evenly enters from the bottom of UASB reactor through water distribution system, and upwards flow through reaction zone and enter gas, solid, liquid disengaging zone, finally enter the settling region on up flow anaerobic sludge blanket reactor UASB top; In mixed solution, mud returns to reaction zone by action of gravity autoprecipitation district through three-phase separation area, and the biogas produced then discharges reactor by collection chamber through pipeline.
(d) and then from pump circulation UASB pond waste water out enter into oxygen compatibility pool and carry out holding concurrently and support and charcoal method active sludge combined treatment, hold concurrently oxygen and charcoal method active sludge combined treatment concrete steps as follows: first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, the particularly introducing of PACT activated sludge process, makes it stronger to the tolerance of waste water toxic material;
E waste water that () to support from holding concurrently pond out enters into PACT aeration tank, carries out Aerobic biological process, to remove the organism in sewage further; Wherein, arrange following parameter when Air Exposure: according to different quality situation, the BOD amount removed at this process section and ammonia nitrogen amount are to determine aeration rate.
F () waste water out from PACT aeration tank enters into medium sediment pool, precipitate through medium sediment pool;
G () enters into hydrolysis acidification pool and contact-oxidation pool successively from waste water out after medium sediment pool precipitation, be hydrolyzed acidification, acidication and catalytic oxidation combined treatment concrete steps as follows: second stage AO runs under low stain concentration, low load condition, for the hardly degraded organic substance in waste water, extend contact time, ensure the degradation capability to it, ensure that final outflow water water conditioning is up to standard.
H () enters into second pond from contact-oxidation pool waste water out, through sedimentation in secondary sedimentation tank, after precipitation, water outlet can qualified discharge, and the mud in sludge thickener, through processed, is transported to landfill yard landfill or burning outward.
Embodiment 3
On the basis of embodiment 1, (a) waste water remove portion suspended substance after grid enters into equalizing tank, then enters into iron-carbon micro-electrolysis pond and carry out comprising microelectrolysis processing; 5 times of flow when the add-on of homogeneous phase granular filler is waste water.
B () then enters FT oxidation pond and carries out the oxidation of coal/Sweet natural gas indirect liquefaction, be specially: have employed fractional order reaction mode and be oxidized, in oxidation pond, branch segmentation adds Fenton oxidation agent, 3 ~ 5 times of flow when the dosage of Fenton oxidation agent is waste water.
C () enters into coagulative precipitation tank from FT oxidation pond waste water out, add the flocculation agent PAM of 0.1% concentration, the slag that precipitation produces and mud are transported in sludge thickener, sewage enters into pump circulation UASB pond and carries out anaerobic biological treatment, sewage evenly enters from the bottom of UASB reactor through water distribution system, and upwards flow through reaction zone and enter gas, solid, liquid disengaging zone, finally enter the settling region on up flow anaerobic sludge blanket reactor UASB top; In mixed solution, mud returns to reaction zone by action of gravity autoprecipitation district through three-phase separation area, and the biogas produced then discharges reactor by collection chamber through pipeline.
(d) and then from pump circulation UASB pond waste water out enter into oxygen compatibility pool and carry out holding concurrently and support and charcoal method active sludge combined treatment, hold concurrently oxygen and charcoal method active sludge combined treatment concrete steps as follows: first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, the particularly introducing of PACT activated sludge process, makes it stronger to the tolerance of waste water toxic material;
E waste water that () to support from holding concurrently pond out enters into PACT aeration tank, carries out Aerobic biological process, to remove the organism in sewage further; Wherein, arrange following parameter when Air Exposure: according to different quality situation, the BOD amount removed at this process section and ammonia nitrogen amount are to determine aeration rate.
F () waste water out from PACT aeration tank enters into medium sediment pool, precipitate through medium sediment pool;
G () enters into hydrolysis acidification pool and contact-oxidation pool successively from waste water out after medium sediment pool precipitation, be hydrolyzed acidification, acidication and catalytic oxidation combined treatment concrete steps as follows: second stage AO runs under low stain concentration, low load condition, for the hardly degraded organic substance in waste water, extend contact time, ensure the degradation capability to it, ensure that final outflow water water conditioning is up to standard.
H () enters into second pond from contact-oxidation pool waste water out, through sedimentation in secondary sedimentation tank, after precipitation, water outlet can qualified discharge, and the mud in sludge thickener, through processed, is transported to landfill yard landfill or burning outward.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (6)
1. a wastewater of chemical industry with high concentration treatment process, comprises pre-treatment, up-flow anaerobic sludge blanket process and catalytic oxidation process successively, it is characterized in that: described pre-treatment comprises Fe-C micro electrolysis and Fenton oxidation step; Described biochemical treatment comprises two-stage A/O treatment step; First step A/O step in described two-stage A/O step comprises double oxygen and charcoal method active sludge combined treatment, and second stage A/O step comprises acidication and catalytic oxidation combined treatment.
2. wastewater of chemical industry with high concentration treatment process according to claim 1, it is characterized in that: described Fe-C micro electrolysis step is specially: pending acid waste water is joined in the reactor body being provided with filler support bracket, add homogeneous phase granular filler to mix and carry out micro-electrolysis reaction, wherein, when the add-on of homogeneous phase granular filler is waste water, the 4-6 of flow doubly.
3. wastewater of chemical industry with high concentration treatment process according to claim 1, it is characterized in that: described Fenton oxidation step is: have employed fractional order reaction mode and be oxidized, in oxidation pond, branch segmentation adds Fenton oxidation agent, 3 ~ 5 times of flow when the dosage of Fenton oxidation agent is waste water.
4. wastewater of chemical industry with high concentration treatment process according to claim 1, it is characterized in that: described anaerobic treatment concrete steps are: sewage evenly enters from the bottom of reactor through water distribution system, and upwards flow through reaction zone and enter gas, solid, liquid disengaging zone, finally enter the settling region on up flow anaerobic sludge blanket reactor UASB top; In mixed solution, mud returns to reaction zone by action of gravity autoprecipitation district through three-phase separation area, and the biogas produced then discharges reactor by collection chamber through pipeline.
5. wastewater of chemical industry with high concentration treatment process according to claim 1, it is characterized in that: described double oxygen and charcoal method active sludge combined treatment concrete steps as follows: first step AO runs under high pollution concentration, high-load condition, improve the utilization ratio of structures volume, the particularly introducing of PACT activated sludge process, makes it stronger to the tolerance of waste water toxic material.
6. wastewater of chemical industry with high concentration treatment process according to claim 1, it is characterized in that: described acidication and catalytic oxidation combined treatment concrete steps as follows: second stage AO runs under low stain concentration, low load condition, for the hardly degraded organic substance in waste water, extend contact time, ensure the degradation capability to it, ensure that final outflow water water conditioning is up to standard.
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Cited By (3)
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| CN106277596A (en) * | 2016-08-29 | 2017-01-04 | 湖州至美生物科技有限公司 | The high concentration medical wastewater processing equipment of a kind of function bacterium intensive treatment and technique |
| CN111253018A (en) * | 2020-03-30 | 2020-06-09 | 煤科集团杭州环保研究院有限公司 | Integrated treatment device and method for traditional Chinese medicine decoction wastewater |
| CN115626751A (en) * | 2022-12-05 | 2023-01-20 | 北京科净源科技股份有限公司 | A divide biological treatment device fast for sewage advanced treatment |
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