CN103193313A - 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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- CN103193313A CN103193313A CN201310112927XA CN201310112927A CN103193313A CN 103193313 A CN103193313 A CN 103193313A CN 201310112927X A CN201310112927X A CN 201310112927XA CN 201310112927 A CN201310112927 A CN 201310112927A CN 103193313 A CN103193313 A CN 103193313A
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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 the method for a kind of membrane bioreactor and Treatment of Wastewater in Coking.
Background technology
Coking chemical waste water is mainly from water of productive use and vapor condensation waste water in the first cold-peace coking production process of coke-oven gas.Its COD of coking chemical waste water, NH
4 +-N concentration height, the organic components complexity, component is of a great variety, and the Pollutant levels height.Wherein inorganic pollutant mainly contains: NH
4 +-N, S
2-, SCN
-, CN
-Organic pollutant has: alkaline matters such as phenols, pyridine, aniline, quinoline, carbazole, also contain a large amount of mononuclear aromatics compounds and bio-refractory materials such as 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 the coking waste water
4 +-N and COD mainly adopt biochemical process, and wherein based on common aerating activated sludge process, this method can effectively be removed phenols in the coking chemical waste water, cyanides, but because the NH of hardly degraded organic substance and high density
4 +The interference effect of the biochemical treatment of-N makes treatment effect relatively poor, is difficult to the qualified discharge standard.
China's technology is backward relatively, has 80% coal chemical enterprise to exist ammonia nitrogen and COD discharging situation not up to standard after the Treatment of Coking Effluent.
Summary of the invention
To the objective of the invention is to adopt existing method to handle back ammonia nitrogen and COD discharging technical problem not up to standard in order solving, the method for a kind of twin-stage fluidized-bed-membrane bioreactor and employing twin-stage fluidized-bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to be provided.
Twin-stage fluidized-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 twin-stage fluidized-bed-Membrane Bioreactor for Wastewater Treatment coking chemical waste water to carry out according to following steps:
One, coking chemical waste water enters the one-level fluidized-bed, be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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, the one-level fluidized-bed is provided with reflux pump and under meter, and reflux pump provides the one-level fluidized-bed required fluidisation power;
Two, the water outlet of step 1 enters the secondary fluidized-bed, be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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, the secondary fluidized-bed is provided with reflux pump and under meter, and reflux pump provides the secondary fluidized-bed required fluidisation power;
Three, the water outlet of step 2 enters twin-stage fluidized-bed-membrane bioreactor, be that 2-6mg/l, hydraulic detention time are to pass through membrane module under the condition of 2-20h at dissolved oxygen, water outlet under the suction function of suction pump and under meter, water outlet enter in the clean water basin, namely finish the processing of coking chemical waste water.
One-level fluidized-bed inside is the grain active carbon filling of 0.5～2mm by particle diameter in the step 1, and secondary fluidized-bed inside is that 0.5～1mm clinoptilolite is filled by particle diameter in the step 2.
The present invention has following characteristics:
1, coking waste water treatment process of the present invention adopts twin-stage fluidized-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 the twin-stage fluidized-bed, and the effect of one-level fluidized-bed adopts the seed activity carbon support that absorption degradations such as the hardly degraded organic substance in the coking chemical waste water such as phenols, prussiate are removed; The effect of secondary fluidized-bed adopts the clinoptilolite carrier that the absorption of the ammonia nitrogen ion-exchange in the coking chemical waste water is removed, and has improved the biodegradability of follow-up waste water greatly, has alleviated the processing load of follow-up aerobic sludge.
3, system of the present invention adopts the two-stage anaerobic fluidized-bed, the organism in the 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 entire treatment process system compact construction, and floor space is little.
Description of drawings
Fig. 1 is the schema that the present invention adopts twin-stage fluidized-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 twin-stage fluidized-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 and embodiment one are different 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 and embodiment one are different 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 twin-stage fluidized-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, be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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, be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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 twin-stage fluidized-bed-membrane bioreactor 13, be that 2-6mg/l, hydraulic detention time are by membrane module 14 under the condition of 2-20h at dissolved oxygen, water outlet under the suction function of suction pump 16 and under meter 16-1, water outlet enters in the clean water basin 17, namely finishes the processing of coking chemical waste water.
Absorption such as the phenols in the waste water, prussiate are removed in effects such as absorption degradation by one-level fluidized-bed 1 in the present embodiment step 1, the part of anaerobism effect degraded simultaneously larger molecular organicses etc., the gas that produces in the anaerobic fermentation process is collected by gas collector and is utilized.
The ammonia nitrogen absorption in the coking chemical waste water is removed in clinoptilolite absorption and ion exchange in the present embodiment step 2 in the water outlet of step 1 and the secondary fluidized-bed 7, the part of anaerobism effect degraded simultaneously larger molecular organics, the gas that produces in the anaerobic fermentation process is collected by gas collector 10 and is utilized.
The aerating apparatus 15 of twin-stage fluidized-bed-membrane bioreactor 13 bottoms provides dissolved oxygen and hydraulic shear for twin-stage fluidized-bed-membrane bioreactor 13 in the present embodiment step 3.
Embodiment five: present embodiment and embodiment five are different is that one-level fluidized-bed 1 inside is that the grain active carbon of 0.5～2mm is filled by particle diameter in the step 1, and the grain diameter that forms behind the microbial film is 2～4mm.Other is identical with embodiment four.
Embodiment six: what present embodiment was different with embodiment four or five is that secondary fluidized-bed 7 inside are that 0.5～1mm clinoptilolite is filled by particle diameter in the step 2, and the grain diameter behind the formation 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 twin-stage fluidized-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, be that 1mg/l, hydraulic detention time are to handle under the condition of 10h at dissolved oxygen, the gas that produces in the 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, be that 1mg/l, hydraulic detention time are to handle under the condition of 2h at dissolved oxygen, the gas that produces in the 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 twin-stage fluidized-bed-membrane bioreactor 13, be that 6mg/l, hydraulic detention time are by membrane module 14 under the condition of 20h at dissolved oxygen, water outlet under the suction function of suction pump 16 and under meter 16-1, water outlet enters in the clean water basin 17, namely finishes the processing of coking chemical waste water.
Absorption such as the phenols in the waste water, prussiate are removed in effects such as absorption degradation by one-level fluidized-bed 1 in this testing sequence one, the part of anaerobism effect degraded simultaneously larger molecular organicses etc., the gas that produces in the anaerobic fermentation process is collected by gas collector and is utilized.
The ammonia nitrogen absorption in the 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 the secondary fluidized-bed 7, the part of anaerobism effect degraded simultaneously larger molecular organics, the gas that produces in the anaerobic fermentation process is collected by gas collector 10 and is utilized.
The aerating apparatus 15 of twin-stage fluidized-bed-membrane bioreactor 13 bottoms provides dissolved oxygen and hydraulic shear for twin-stage fluidized-bed-membrane bioreactor 13 in this testing sequence three.
Twin-stage fluidized-bed-membrane bioreactor 13 comprises membrane module 14 and aerating apparatus 15 in this test, described membrane module 14 is shaped as the 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.
" urban sewage reutilization-city miscellaneous water water quality " standard that adopts the method Treatment of Wastewater in Coking effluent quality of this test to reach.
Adopt result such as the table 1 of the Treatment of Coking Effluent front and back of this test method processing:
Table 1
Claims (6)
1. twin-stage fluidized-bed-membrane bioreactor, twin-stage fluidized-bed-membrane bioreactor comprises membrane module (14) and aerating apparatus 15, it is characterized in that 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.
2. according to the described twin-stage fluidized-bed-membrane bioreactor of claim 1, the swabbing pressure that it is characterized in that described membrane module (14) is 10-60kPa, and membrane flux is 10-30L/m
2H.
3. according to the described twin-stage fluidized-bed-membrane bioreactor of claim 1, the film hole diameter that it is characterized in that described membrane module (14) is 0.05 μ m.
4. adopt the method for the described twin-stage fluidized-bed of claim 1-Membrane Bioreactor for Wastewater Treatment coking chemical waste water, it is characterized in that adopting the method for twin-stage fluidized-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), be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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), be that 0-1mg/l, hydraulic detention time are to handle under the condition of 2-10h at dissolved oxygen, the gas that produces in the 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 twin-stage fluidized-bed-membrane bioreactor (13), be that 2-6mg/l, hydraulic detention time are by membrane module (14) under the condition of 2-20h at dissolved oxygen, water outlet under the suction function of suction pump (16) and under meter (16-1), water outlet enters in the clean water basin 17, namely finishes the processing of coking chemical waste water.
5. according to the method for the described employing twin-stage fluidized-bed of claim 4-Membrane Bioreactor for Wastewater Treatment coking chemical waste water; it is characterized in that one-level fluidized-bed (1) inside is the grain active carbon filling of 0.5～2mm by particle diameter in the step 1, the grain diameter behind the formation microbial film is 2～4mm.
6. according to the method for the described employing twin-stage fluidized-bed of claim 4-Membrane Bioreactor for Wastewater Treatment coking chemical waste water, it is characterized in that secondary fluidized-bed (7) inside is that 0.5～1mm clinoptilolite is filled by particle diameter in the step 2, the grain diameter behind the formation microbial film is 2～3mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481099A (en) * | 2014-09-19 | 2016-04-13 | 鞍钢股份有限公司 | Treatment method of oil-removed coking wastewater |
| 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 |
| CN107515288A (en) * | 2017-10-13 | 2017-12-26 | 中国科学院南京地理与湖泊研究所 | The apparatus and method of Quantitative detection water body Dissolved Organic Matter bioactivity |
| 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 |
| CN112777848A (en) * | 2020-12-13 | 2021-05-11 | 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
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2013
- 2013-04-02 CN CN201310112927.XA patent/CN103193313B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481099A (en) * | 2014-09-19 | 2016-04-13 | 鞍钢股份有限公司 | Treatment method of oil-removed coking wastewater |
| 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 |
| CN107515288A (en) * | 2017-10-13 | 2017-12-26 | 中国科学院南京地理与湖泊研究所 | The apparatus and method of Quantitative detection water body Dissolved Organic Matter bioactivity |
| 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 |
| CN112777848A (en) * | 2020-12-13 | 2021-05-11 | 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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