CN105923888B - A kind of method of Fenton oxidation-MBR combined depths processing antibiotic waste water - Google Patents
A kind of method of Fenton oxidation-MBR combined depths processing antibiotic waste water Download PDFInfo
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- CN105923888B CN105923888B CN201610250909.1A CN201610250909A CN105923888B CN 105923888 B CN105923888 B CN 105923888B CN 201610250909 A CN201610250909 A CN 201610250909A CN 105923888 B CN105923888 B CN 105923888B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F2101/305—Endocrine disruptive agents
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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
- C02F2103/343—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 pharmaceutical industry, e.g. containing antibiotics
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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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of methods that Fenton oxidation MBR combined depths handle antibiotic waste water, this method be by antibiotic waste water after grid filtration, it sequentially enters regulating reservoir and carries out coagulating sedimentation and hydrolysis acidification pool progress acidification, antibiotic waste water after acidification enters Fenton oxidation pond and carries out Fenton oxidation processing, and Fenton oxidation treated waste water sequentially enters anaerobic pond and MBR aerobic tanks carry out microbiological treatment.This method using Fenton oxidation technique realize in antibiotic waste water antibiotic and hardly degraded organic substance preliminary oxidation degrade, and then MBR technique advanced treatment of waste water is combined, so that effluent quality is reached the water standard of GB21903 2008, the technological process is simple, cost low cost, can promote and apply.
Description
Technical field
The present invention relates to a kind of methods of advanced treating antibiotic waste water；More particularly to a kind of Fenton oxidation-MBR joints are deep
The method of degree processing antibiotic waste water；Belong to treatment of Organic Wastewater field.
Background technology
Currently, the relevant enterprise of China's antibiotics production is up to family more than 300, the yield and export volume of antibiotic have occupied
The first in the world.However, during antibiotics production each stage such as microbial fermentation, filtering, crystallization, extraction, extraction, it is refined all
It will produce a large amount of antibiotic waste water.And antibiotic waste water is with COD is very high, concentration of suspension is high, complicated component, there are residual
The features such as remaining antibiotic, salt content are high, coloration is high, intermittent discharge, belongs to high concentrated organic wastewater very difficult to degrade.It is traditional high
The organic wastewater of concentration can be handled effectively by group technologies such as anaerobic-aerobics, and the antibiosis in antibiotic waste water
Element can seriously inhibit anaerobism, the activity of aerobic microbiological, antibiotic waste water more difficult than traditional high concentrated organic wastewater.And
And the antibiotic in waste water can destroy the ecological balance, and greatly danger is generated to the health of people as food chain and water enter human body
Evil.Thus, exploitation efficiently antibiotic waste water Processing tecchnics be very it is necessary to.
Currently, the domestic processing to high concentration antibiotic waste water is still in the exploratory stage.Domestic antibiotic waste water processing
Technique mainly uses pretreatment-anaerobic-aerobic combination.But it is the failure to solve difficult to degrade containing a large amount of microorganisms in antibiotic waste water
The problem of organic matter, is still extremely difficult to discharge standard, and it is exceeded to be mainly manifested in COD, coloration etc., and water outlet still can detect
To antibiotic.
Invention content
For deficiency existing for existing antibiotic waste water treatment process, the purpose of the invention is to provide one kind with sweet smell
The method that the oxidation-MBR combined depths that pause handle antibiotic waste water, this method purification effluent quality is excellent, meets GB21903-
2008, and simple process and low cost is honest and clean, is conducive to promote and apply.
The present invention provides a kind of Fenton oxidation-MBR combined depths handle antibiotic waste water method, this method include with
Lower step：
(1) antibiotic waste water sequentially enters regulating reservoir and carries out coagulating sedimentation and hydrolysis acidification pool progress after grid filtration
Acidification；
(2) antibiotic waste water after acidification enters the progress Fenton oxidation processing of Fenton oxidation pond；
(3) Fenton oxidation treated waste water sequentially enters anaerobic pond and MBR aerobic tanks carry out microbiological treatment.
Preferred scheme, it is 1~4 that the pH of solution system is maintained in Fenton oxidation pond, and Fe2+A concentration of 2~30mg/L,
H2O2A concentration of 30~300mg/L, antibiotic waste water residence time in the Fenton oxidation pond is 0.5~10h.
Preferred scheme maintains in anaerobic pond the dissolved oxygen concentration of solution system in 0.2mg/L hereinafter, antibiotic waste water exists
Residence time is 10~40h in the anaerobic pond.
Preferred scheme, MBR aerobic tanks are interior to maintain the dissolved oxygen concentration of solution system in 2mg/L or more, antibiotic waste water
Residence time is 10~40h in the oxygen consumption pond.
More preferably scheme, it is 0.03~0.45 μm that MBR aerobic tanks, which use external pressure type hollow fiber membrane component, membrane aperture,
Membrane flux is 15~40L/ (m2·h)。
More preferably scheme, external pressure type hollow fiber membrane component include gas-washing device, water washing device and chemical reagent cleaning
Device.
The pH of preferred scheme, the interior maintenance solution system of hydrolysis acidification pool is 4~6.5, and antibiotic waste water is in the hydrolysis
Residence time is 10~40h in acidification pool.
Preferred scheme, coagulating sedimentation are described mixed using the precipitating reagent including aluminium polychloride and polyacrylamide
The time that retrogradation is formed sediment is 1~10h.
Preferred scheme, antibiotic waste water include at least one of penicillin, streptomysin and erythromycin antibiotic composition, and
COD total contents are higher than 11000mg/L, and ammonia-nitrogen content is higher than 560mg/L.Technical scheme of the present invention be suitable for containing penicillin,
The processing of the waste water such as streptomysin or erythromycin, especially suitable for high concentration antibiotic waste water.
Technical scheme of the present invention, antibiotic waste water after Fenton oxidation is handled, hardly degraded organic substance in waste water and
Residual antibiotic obtains preliminary exposition, is conducive to subsequent MBR techniques biological treatment.
Technical scheme of the present invention, antibiotic waste water carry out denitrification denitrogenation in anaerobic pond, are reduced in MBR aerobic tanks
The COD of waste water, water outlet reach GB21903-2008 discharge standards.
Compared with the prior art, the advantageous effects that technical scheme of the present invention is brought：
Technical scheme of the present invention by Fenton oxidation technique and MBR process integration advanced treating antibiotic waste waters, makes for the first time
The excellent scarce complementary, synergistic function of the two is remarkably reinforced.If Fenton oxidation process antibiotic waste water is used alone, though
So there is strong oxidizing property, can be by most of hardly degraded organic substance oxygenolysis, but its cost will produce a large amount of sludge than high；And
Antibiotic waste water is individually handled using MBR technology, microorganism, turbidity and the larger molecular organics in waste water can be removed effectively
Deng, ensure the quality of water outlet, and cost is relatively low, but the residues of antibiotics in antibiotic waste water can inhibit the activity of activated sludge,
And hardly degraded organic substance can also cause fouling membrane.Two kinds of technique perfect adaptations are made full use of Fenton by technical scheme of the present invention
The antibiotic preliminary oxidation that hardly possible is decomposed in oxidation decomposes, then further biodegradable using MBR techniques, by micro- life in waste water
Object, turbidity and larger molecular organics etc. fully remove, and ensure the quality of water outlet, substantially reduce cost.
The technological process of the present invention is simple, and cost low cost can promote and apply.
Description of the drawings
【Fig. 1】For the process flow chart of present invention processing antibiotic waste water.
Specific implementation mode
Following embodiment is intended to further illustrate the content of present invention, rather than limits the model of the claims in the present invention protection
It encloses.
Embodiment 1
By taking certain antibiotic pharmacy corporation waste water as an example, waste water passes through grid, regulating reservoir, hydrolysis acidification pool, Fenton oxygen successively
Change pond, anaerobic pond and MBR aerobic tanks to be handled.Waste water aluminium polychloride in regulating reservoir is 30mg/L, and polyacrylamide is
5mg/L, hydraulic detention time 2h；Waste water is 36h, pH value 6.0 in the hydraulic detention time of hydrolysis acidification pool；Waste water is in sweet smell
PH is 2.0, Fe in oxidation pond2+For 10mg/L, H2O2For 100mg/L, hydraulic detention time 5h；Waste water pH in anaerobic pond
It is 6.8, dissolved oxygen 0.2mg/L, hydraulic detention time 36h；Waste water pH in MBR aerobic tanks is 6.5, dissolved oxygen 2mg/
L, hydraulic detention time 32h, it is 20L/ (m that diaphragm, which uses Pvdf Microporous Hollow Fiber Membrane, membrane flux,2H), membrane aperture is
0.1 μm, aeration quantity 4m3/(m2H), transmembrane pressure control is in 30kPa or less.COD, the ammonia nitrogen of antibiotic waste water before and after the processing
Etc. indexs it is as shown in table 1 below.
The indexs such as COD, the ammonia nitrogen of 1 antibiotic waste water of table before and after the processing
Embodiment 2
By taking certain antibiotic pharmacy corporation waste water as an example, waste water passes through grid, regulating reservoir, hydrolysis acidification pool, Fenton oxygen successively
Change pond, anaerobic pond and MBR aerobic tanks to be handled.Waste water aluminium polychloride in regulating reservoir is 40mg/L, and polyacrylamide is
8mg/L, hydraulic detention time 5h；Waste water is pH value 6.0 for 24 hours in the hydraulic detention time of hydrolysis acidification pool；Waste water is in sweet smell
PH is 4.0, Fe in oxidation pond2+For 20mg/L, H2O2For 200mg/L, hydraulic detention time 1h；Waste water pH in anaerobic pond
It is 6.8, dissolved oxygen 0.1mg/L, hydraulic detention time is for 24 hours；Waste water pH in MBR aerobic tanks is 6.5, dissolved oxygen 4mg/
L, hydraulic detention time are that for 24 hours, it is 40L/ (m that diaphragm, which uses Pvdf Microporous Hollow Fiber Membrane, membrane flux,2H), membrane aperture is
0.3 μm, aeration quantity 4m3/(m2H), transmembrane pressure control is in 20kPa or less.Take each processing unit water outlet detect COD,
Ammonia nitrogen, antibiotic, as a result such as the following table 2：
The indexs such as COD, the ammonia nitrogen of 2 antibiotic waste water of table before and after the processing
To sum up embodiment 1 and embodiment 2 can make in antibiotic waste water as it can be seen that by Fenton oxidation technique combination MBR techniques
The fully oxidized decomposition of antibiotic, and total COD contents and ammonia-nitrogen content are all effectively reduced, draining reaches GB21903-2008 rows
Put standard.
Comparative example 1
By taking the antibiotic waste water of embodiment 2 as an example, waste water successively pass through grid, regulating reservoir, hydrolysis acidification pool, anaerobic pond and
MBR aerobic tanks are handled.The comparative example does not have Fenton oxidation technique, other processing steps, condition etc. and embodiment 2 are complete
It is complete consistent.Each unit water outlet detection COD, ammonia nitrogen, the results are shown in Table 3 for antibiotic.As shown in Table 3, COD, ammonia nitrogen etc. are far above
Embodiment 2, draining cannot reach the standard of GB21903-2008.And found by embodiment 2, only after Fenton oxidation technique
Waste water can not reach discharge standard.This explanation can effectively handle antibiotic by Fenton oxidation technique combination MBR techniques
Waste water.
The indexs such as COD, the ammonia nitrogen of 3 antibiotic waste water of table before and after the processing
Claims (5)
1. a kind of method of Fenton oxidation-MBR combined depths processing antibiotic waste water, it is characterised in that：Include the following steps：
(1) antibiotic waste water sequentially enters regulating reservoir progress coagulating sedimentation and hydrolysis acidification pool is acidified after grid filtration
Processing；It is 4~6.5 that the pH of solution system is maintained in the hydrolysis acidification pool, and antibiotic waste water is in the hydrolysis acidification pool
Residence time is 10~40h；
(2) antibiotic waste water after acidification enters the progress Fenton oxidation processing of Fenton oxidation pond；The Fenton oxidation pond
The pH of interior maintenance solution system is 1~4, and Fe2+A concentration of 2~30mg/L, H2O2A concentration of 30~300mg/L, antibiotic are useless
Water residence time in the Fenton oxidation pond is 0.5~10h；
(3) Fenton oxidation treated waste water sequentially enters anaerobic pond and MBR aerobic tanks carry out microbiological treatment；The anaerobism
In pond maintain solution system dissolved oxygen concentration in 0.2mg/L hereinafter, antibiotic waste water residence time in the anaerobic pond
For 10~40h；
Maintain the dissolved oxygen concentration of solution system in 2mg/L or more in the MBR aerobic tanks, antibiotic waste water is in the oxygen consumption
Residence time is 10~40h in pond.
2. the method for Fenton oxidation-MBR combined depths processing antibiotic waste water according to claim 1, it is characterised in that：
It is 0.03~0.45 μm that the MBR aerobic tanks, which use external pressure type hollow fiber membrane component, membrane aperture, and membrane flux is 15~40L/
(m2·h)。
3. the method for Fenton oxidation-MBR combined depths processing antibiotic waste water according to claim 2, it is characterised in that：
The external pressure type hollow fiber membrane component includes gas-washing device, water washing device and chemical reagent cleaning device.
4. the method for Fenton oxidation-MBR combined depths processing antibiotic waste water according to claim 1, it is characterised in that：
The coagulating sedimentation is using precipitating reagent including aluminium polychloride and polyacrylamide, the time of the coagulating sedimentation
1~10h.
5. according to the method that Claims 1 to 4 any one of them Fenton oxidation-MBR combined depths handle antibiotic waste water,
It is characterized in that：The antibiotic waste water includes at least one of penicillin, streptomysin and erythromycin antibiotic composition, and COD
Total content is higher than 11000mg/L, and ammonia-nitrogen content is higher than 560mg/L.
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| CN108706831A (en) * | 2018-06-05 | 2018-10-26 | 南京大学 | A kind of advanced treatment apparatus and technique of high concentrated organic wastewater |
| CN111777267A (en) * | 2020-06-22 | 2020-10-16 | 东南大学 | Mud-free Fenton coupling multi-module medical wastewater treatment method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654311A (en) * | 2009-06-26 | 2010-02-24 | 上海大学 | New method for processing antibiotic wastewater |
| CN102276101A (en) * | 2010-06-10 | 2011-12-14 | 中国科学院生态环境研究中心 | Biochemical treatment reactor for carbostyril-containing antibiotic waste water |
| CN102583903A (en) * | 2012-03-15 | 2012-07-18 | 山东新时代药业有限公司 | Method for treating antibiotic wastewater |
| CN102826716A (en) * | 2012-09-13 | 2012-12-19 | 艾特克控股集团有限公司 | Treatment method for waste water in production of streptomycin sulfate |
| CN103319058A (en) * | 2013-07-18 | 2013-09-25 | 山东太平洋环保有限公司 | Traditional Chinese medicine extraction wastewater treatment system and technology |
| CN103332831A (en) * | 2013-07-18 | 2013-10-02 | 山东太平洋环保有限公司 | Comprehensive erythromycin thiocyanate mushroom dreg waste water disposal system and method |
| CN104445812A (en) * | 2014-11-14 | 2015-03-25 | 中原工学院 | Treatment method of waste liquor obtained after alcohol mother liquor purifying in doxycycline hydrochloride production |
| CN204939202U (en) * | 2015-08-17 | 2016-01-06 | 台州学院 | Based on the device of magnetic type Fenton resin advanced treatment antibiotics wastewater from chemical industry |
-
2016
- 2016-04-21 CN CN201610250909.1A patent/CN105923888B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654311A (en) * | 2009-06-26 | 2010-02-24 | 上海大学 | New method for processing antibiotic wastewater |
| CN102276101A (en) * | 2010-06-10 | 2011-12-14 | 中国科学院生态环境研究中心 | Biochemical treatment reactor for carbostyril-containing antibiotic waste water |
| CN102583903A (en) * | 2012-03-15 | 2012-07-18 | 山东新时代药业有限公司 | Method for treating antibiotic wastewater |
| CN102826716A (en) * | 2012-09-13 | 2012-12-19 | 艾特克控股集团有限公司 | Treatment method for waste water in production of streptomycin sulfate |
| CN103319058A (en) * | 2013-07-18 | 2013-09-25 | 山东太平洋环保有限公司 | Traditional Chinese medicine extraction wastewater treatment system and technology |
| CN103332831A (en) * | 2013-07-18 | 2013-10-02 | 山东太平洋环保有限公司 | Comprehensive erythromycin thiocyanate mushroom dreg waste water disposal system and method |
| CN104445812A (en) * | 2014-11-14 | 2015-03-25 | 中原工学院 | Treatment method of waste liquor obtained after alcohol mother liquor purifying in doxycycline hydrochloride production |
| CN204939202U (en) * | 2015-08-17 | 2016-01-06 | 台州学院 | Based on the device of magnetic type Fenton resin advanced treatment antibiotics wastewater from chemical industry |
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