CN103193313B - Two-stage fluidized bed-membrane bioreactor and method of treating coking wastewater by using two-stage fluidized bed-membrane bioreactor - Google Patents
Two-stage fluidized bed-membrane bioreactor and method of treating coking wastewater by using two-stage fluidized bed-membrane bioreactor Download PDFInfo
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- CN103193313B CN103193313B CN201310112927.XA CN201310112927A CN103193313B CN 103193313 B CN103193313 B CN 103193313B CN 201310112927 A CN201310112927 A CN 201310112927A CN 103193313 B CN103193313 B CN 103193313B
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- membrane bioreactor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a two-stage fluidized bed-membrane bioreactor and a method of treating coking wastewater by using the two-stage fluidized bed-membrane bioreactor, relating to a membrane bioreactor and a method of treating coking wastewater, and solving the technical problem of the existing method that emission of ammonia nitrogen and COD (Chemical Oxygen Demand) after treatment does not reach the standard. The two-stage fluidized bed-membrane bioreactor comprises a first-stage granular active carbon fluidized bed, a second-stage clinoptilolite fluidized bed, a refluxing device, a membrane component and an aeration device. The method of treating the coking wastewater comprises the steps that phenols and the like in the coking wastewater are removed through the first-stage granular active carbon fluidized bed firstly; then ammonia nitrogen is removed out of the coking wastewater in the second-stage clinoptilolite fluidized bed; the coking wastewater enters an aerobiotic membrane bioreactor to retaining, degrading and removing organic matters; and finally, the coking wastewater is discharged and enters into a clean water basin under the pumping action of a suction pump. With the adoption of the two-stage fluidized bed-membrane bioreactor and the method, the hydraulic retention time is shortened, the occupied area is small, and the quality of discharged water is improved and can reach the standard of Reuse Of Recycling Water For Urban-Water Quality Standard For Urban Miscellaneous Water Consumption.
Description
Technical field
The present invention relates to a kind of method of Treatment of Wastewater in Coking.
Background technology
Coking chemical waste water is mainly from the water of productive use in coke oven gas primary-cooling and coking production process and vapor condensation waste water.Its COD of coking chemical waste water, NH
4 +-N concentration is high, and organic components is complicated, and component is of a great variety, and Pollutant levels are high.Wherein inorganic pollutant mainly contains: NH
4 +-N, S
2-, SCN
-, CN
-; Organic pollutant has: the alkaline matters such as phenols, pyridine, aniline, quinoline, carbazole, also contain the bio-refractory materials such as a large amount of mononuclear aromatics compounds and PAH (condensed-nuclei aromatics) and heterocyclic arene.
< < integrated wastewater discharge standard > > (GB8978-96) requires coking chemical waste water effluent quality NH
4 +-N<15mg/L, COD<100mg/L.Engineering gets on except the NH in coking chemical waste water
4 +-N and COD mainly adopt biochemical process, wherein take common aerating activated sludge process as main, and the method can effectively be removed phenols in coking chemical waste water, cyanides, but due to the NH of hardly degraded organic substance and high density
4 +the interference effect of-N to biochemical treatment, makes treatment effect poor, is difficult to qualified discharge standard.
China's technology is relatively backward, has 80% coal chemical enterprise to exist ammonia nitrogen and COD discharge situation not up to standard after Treatment of Coking Effluent.
Summary of the invention
To the object of the invention is to adopt existing method to process rear ammonia nitrogen and COD discharge technical problem not up to standard in order solving, a kind of method that adopts using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to be provided.
Using two-stage fluid bed-membrane bioreactor comprises membrane module and aerating apparatus, described membrane module is shaped as tubular fibre formula or flat, the material of described membrane module is polyvinylidene difluoride (PVDF), polyvinyl chloride, polyethersulfone, polyacrylonitrile or polypropylene ultra-filtration membrane, the film hole diameter of described membrane module is 0.01～0.1 μ m, the swabbing pressure of described membrane module is 10～60kPa, and membrane flux is 10～30L/m
2h.
Adopt the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to carry out according to following steps:
One, coking chemical waste water enters one-level fluidized-bed, at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector by triphase separator, outside the mud valve discharge system of remainder particulate mud by one-level fluidized-bed bottom, one-level fluidized-bed is provided with reflux pump and under meter, and reflux pump provides one-level fluidized-bed required fluidisation power;
Two, the water outlet of step 1 enters secondary fluidized-bed, at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector by triphase separator, outside the mud valve discharge system of remainder particulate mud by secondary fluidized-bed bottom, secondary fluidized-bed is provided with reflux pump and under meter, and reflux pump provides secondary fluidized-bed required fluidisation power;
Three, the water outlet of step 2 enters using two-stage fluid bed-membrane bioreactor, at dissolved oxygen, be to pass through membrane module under 2-6mg/l, the hydraulic detention time condition that is 2-20h, water outlet under the suction function of suction pump and under meter, water outlet enters in clean water basin, completes the processing of coking chemical waste water.
The grain active carbon that in step 1, one-level fluidized-bed inside is 0.5～2mm by particle diameter is filled, and in step 2, secondary fluidized-bed inside is that 0.5～1mm clinoptilolite is filled by particle diameter.
The present invention has following characteristics:
1, coking waste water treatment process of the present invention adopts using two-stage fluid bed and aerobic membrane bioreactor series combination to form, hydraulic detention time shortens and effluent quality improves, effluent quality can reach < < urban sewage reutilization-city miscellaneous water water quality > > standard, realizes the zero release target of enterprise wastewater.
2, the present invention adopts using two-stage fluid bed, and the effect of one-level fluidized-bed adopts seed activity carbon support that the hardly degraded organic substance in coking chemical waste water is removed as absorption degradations such as phenols, prussiates; The effect of secondary fluidized-bed adopts clinoptilolite carrier that the ammonia nitrogen ion-exchange absorption in coking chemical waste water is removed, and has greatly improved the biodegradability of follow-up waste water, has alleviated the processing load of follow-up aerobic sludge.
3, system of the present invention adopts two-stage anaerobic fluidized-bed, the organism in waste water can be changed into available energy gases methane and hydrogen etc.
4, the present invention has introduced membrane bioreactor, has replaced second pond, makes whole treatment process system architecture compact, and floor space is little.
Accompanying drawing explanation
Fig. 1 is the schema that the present invention adopts using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: present embodiment using two-stage fluid bed-membrane bioreactor comprises membrane module 14 and aerating apparatus 15, described membrane module 14 is shaped as tubular fibre formula or flat, the material of described membrane module 14 is polyvinylidene difluoride (PVDF), polyvinyl chloride, polyethersulfone, polyacrylonitrile or polypropylene ultra-filtration membrane, the film hole diameter of described membrane module 14 is 0.01～0.1 μ m, the swabbing pressure of described membrane module 14 is 10～60kPa, and membrane flux is 10～30L/m
2h.
Embodiment two: present embodiment is different from embodiment one is that the swabbing pressure of described membrane module 14 is 10-6020～50kPa, and membrane flux is 15～2510-30L/m
2h.Other is identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one is that the film hole diameter of described membrane module 14 is 0.05 μ m.Other is identical with embodiment one.
Embodiment four: present embodiment adopts the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to carry out according to following steps:
One, coking chemical waste water enters one-level fluidized-bed 1, at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector 4 by triphase separator 3, remainder particulate mud is by outside the mud valve 5 discharge systems of one-level fluidized-bed 1 bottom, one-level fluidized-bed 1 is provided with reflux pump 6 and under meter 6-1, and reflux pump 6 provides one-level fluidized-bed 1 required fluidisation power;
Two, the water outlet of step 1 enters secondary fluidized-bed 7, at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector 10 by triphase separator 9, remainder particulate mud is by outside the mud valve 11 discharge systems of secondary fluidized-bed 7 bottoms, secondary fluidized-bed 7 is provided with reflux pump 12 and under meter 12-1, and reflux pump 12 provides secondary fluidized-bed 7 required fluidisation power;
Three, the water outlet of step 2 enters using two-stage fluid bed-membrane bioreactor 13, at dissolved oxygen, be by membrane module 14 under 2-6mg/l, the hydraulic detention time condition that is 2-20h, water outlet under the suction function of suction pump 16 and under meter 16-1, water outlet enters in clean water basin 17, completes the processing of coking chemical waste water.
In present embodiment step 1, pass through the effects such as absorption degradation of one-level fluidized-bed 1 by Adsorptions such as the phenols in waste water, prussiates, the part of anaerobic effect degraded simultaneously larger molecular organicses etc., the gas producing in anaerobic fermentation process is collected by gas collector and is utilized.
The ammonia nitrogen absorption in coking chemical waste water is removed in clinoptilolite absorption and ion exchange in present embodiment step 2 in the water outlet of step 1 and secondary fluidized-bed 7, the part of anaerobic effect degraded simultaneously larger molecular organics, the gas producing in anaerobic fermentation process is collected and is utilized by gas collector 10.
In present embodiment step 3, the aerating apparatus 15 of using two-stage fluid bed-membrane bioreactor 13 bottoms provides dissolved oxygen and hydraulic shear for using two-stage fluid bed-membrane bioreactor 13.
Embodiment five: what present embodiment was different from embodiment five is that the grain active carbon that in step 1, one-level fluidized-bed 1 inside is 0.5～2mm by particle diameter is filled, the grain diameter forming after microbial film is 2～4mm.Other is identical with embodiment four.
Embodiment six: what present embodiment was different from embodiment four or five is that in step 2, secondary fluidized-bed 7 inside are that 0.5～1mm clinoptilolite is filled by particle diameter, the grain diameter forming after microbial film is 2～3mm.Other is identical with embodiment four or five.
Adopt following verification experimental verification effect of the present invention:
Test one:
Adopt the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to carry out according to following steps:
One, coking chemical waste water enters one-level fluidized-bed 1, at dissolved oxygen, be to process under 1mg/l, the hydraulic detention time condition that is 10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector 4 by triphase separator 3, remainder particulate mud is by outside the mud valve 5 discharge systems of one-level fluidized-bed 1 bottom, one-level fluidized-bed 1 is provided with reflux pump 6 and under meter 6-1, and reflux pump 6 provides one-level fluidized-bed 1 required fluidisation power;
Two, the water outlet of step 1 enters secondary fluidized-bed 7, at dissolved oxygen, be to process under 1mg/l, the hydraulic detention time condition that is 2h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector 10 by triphase separator 9, remainder particulate mud is by outside the mud valve 11 discharge systems of secondary fluidized-bed 7 bottoms, secondary fluidized-bed 7 is provided with reflux pump 12 and under meter 12-1, and reflux pump 12 provides secondary fluidized-bed 7 required fluidisation power;
Three, the water outlet of step 2 enters using two-stage fluid bed-membrane bioreactor 13, at dissolved oxygen, be by membrane module 14 under 6mg/l, the hydraulic detention time condition that is 20h, water outlet under the suction function of suction pump 16 and under meter 16-1, water outlet enters in clean water basin 17, completes the processing of coking chemical waste water.
In this testing sequence one, pass through the effects such as absorption degradation of one-level fluidized-bed 1 by Adsorptions such as the phenols in waste water, prussiates, the part of anaerobic effect degraded simultaneously larger molecular organicses etc., the gas producing in anaerobic fermentation process is collected by gas collector and is utilized.
The ammonia nitrogen absorption in coking chemical waste water is removed in clinoptilolite absorption and ion exchange in this testing sequence two in the water outlet of step 1 and secondary fluidized-bed 7, the part of anaerobic effect degraded simultaneously larger molecular organics, the gas producing in anaerobic fermentation process is collected and is utilized by gas collector 10.
In this testing sequence three, the aerating apparatus 15 of using two-stage fluid bed-membrane bioreactor 13 bottoms provides dissolved oxygen and hydraulic shear for using two-stage fluid bed-membrane bioreactor 13.
In this test, using two-stage fluid bed-membrane bioreactor 13 comprises membrane module 14 and aerating apparatus 15, described membrane module 14 is shaped as tubular fibre formula, the material of described membrane module 14 is polyvinylidene difluoride (PVDF), the film hole diameter of described membrane module 14 is 0.1 μ m, the swabbing pressure of described membrane module 14 is 10kPa, and membrane flux is 10L/m
2h.
Adopt the method Treatment of Wastewater in Coking effluent quality of this test can reach < < urban sewage reutilization-city miscellaneous water water quality > > standard.
Adopt result before and after the Treatment of Coking Effluent that this test method processes as table 1:
Table 1
Claims (2)
1. adopt the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water, it is characterized in that adopting the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to carry out according to following steps:
One, coking chemical waste water enters one-level fluidized-bed (1), at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector (4) by triphase separator (3), outside mud valve (5) the discharge system of remainder particulate mud by one-level fluidized-bed (1) bottom;
Two, the water outlet of step 1 enters secondary fluidized-bed (7), at dissolved oxygen, be to process under 0-1mg/l, the hydraulic detention time condition that is 2-10h, the gas producing in Treatment of Wastewater in Coking process is collected by gas collector (10) by triphase separator (9), outside mud valve (11) the discharge system of remainder particulate mud by secondary fluidized-bed (7) bottom;
Three, the water outlet of step 2 enters using two-stage fluid bed-membrane bioreactor (13), at dissolved oxygen, be by membrane module (14) under 6mg/l, the hydraulic detention time condition that is 2-20h, water outlet under the suction function of suction pump (16) and under meter (16-1), water outlet enters in clean water basin 17, completes the processing of coking chemical waste water;
The grain active carbon that in step 1, one-level fluidized-bed (1) inside is 0.5～2mm by particle diameter is filled, and the grain diameter forming after microbial film is 2～4mm.
2. adopt according to claim 1 the method for using two-stage fluid bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water, it is characterized in that in step 2, secondary fluidized-bed (7) inside is that 0.5～1mm clinoptilolite is filled by particle diameter, the grain diameter forming after microbial film is 2～3mm.
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| CN201310112927.XA CN103193313B (en) | 2013-04-02 | 2013-04-02 | Two-stage fluidized bed-membrane bioreactor and method of treating coking wastewater by using two-stage fluidized bed-membrane bioreactor |
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| CN201310112927.XA CN103193313B (en) | 2013-04-02 | 2013-04-02 | Two-stage fluidized bed-membrane bioreactor and method of treating coking wastewater by using two-stage fluidized bed-membrane bioreactor |
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| CN105481099B (en) * | 2014-09-19 | 2017-10-27 | 鞍钢股份有限公司 | The processing method of coking chemical waste water after a kind of oil removing |
| CN106946420A (en) * | 2017-05-17 | 2017-07-14 | 浙江清环保工程有限公司 | A kind of integrated conduct method of high-concentration ammonia nitrogenous wastewater |
| CN107515288B (en) * | 2017-10-13 | 2024-02-06 | 中国科学院南京地理与湖泊研究所 | Device and method for rapidly and quantitatively detecting biological activity of water-soluble organic matters |
| CN109467154A (en) * | 2018-12-07 | 2019-03-15 | 铜陵泰富特种材料有限公司 | The purification method of coking wastewater |
| CN112777848B (en) * | 2020-12-13 | 2022-08-23 | 中海油天津化工研究设计院有限公司 | Membrane aeration biological activated carbon bed advanced treatment system and method |
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