CN108585364A - A kind of advanced treatment process and its system for used water difficult to degradate - Google Patents
A kind of advanced treatment process and its system for used water difficult to degradate Download PDFInfo
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- CN108585364A CN108585364A CN201810456716.0A CN201810456716A CN108585364A CN 108585364 A CN108585364 A CN 108585364A CN 201810456716 A CN201810456716 A CN 201810456716A CN 108585364 A CN108585364 A CN 108585364A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/66—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a kind of advanced treatment process and its system for used water difficult to degradate, the technique includes two-stage ozone oxidation MBR processing, waste water first entered into level-one ozone Oxidation Treatment improve and enter level-one MBR after biodegradability and carry out biochemical aerobic reaction, remove enter back into after partial organic substances secondary ozone oxidation processes continue to improve enter secondary MBR depth degradation after biodegradability after be discharged；The present invention is by being arranged two-stage ozone oxidation MBR processing, control ozone oxidation degree, wastewater biodegradability is improved using ozone oxidation, the organic matter in waste water is reduced using MBR biochemical aerobic reactions, relative to traditional ozone oxidation MBR techniques, ozone oxidation reaction body product and ozone dosage are significantly reduced, reduces investment cost and operating cost, while enhancing advanced treating effect.
Description
Technical field
The present invention relates to advanced treatment of industrial waste water fields, more particularly to a kind of advanced treating for used water difficult to degradate
Technique and its system.
Background technology
After biological wastewater treatment, residual organic substances are generally difficult to biodegradation.These organic matters have carcinogenic, teratogenesis and cause
" three cause " effect of mutation, it is very harmful, it is necessary to give deep removal.The hardly degraded organic substance of these low concentrations is mainly adopted
It is removed with high-level oxidation technology, in numerous high-level oxidation technologies, photocatalysis, catalytic wet oxidation, electro-catalysis and ultrasonic oxidation
Equal technical finesses cost is higher, and primary limitation is in the laboratory research stage at present.More advanced oxidation is industrially applied at present
Technology is Fenton oxidation and the relevant high-level oxidation technology of ozone oxidation.Fenton oxidation technology due to adjusting wastewater pH repeatedly, at
This is higher, has a certain impact to follow-up film process, while sludge yield is big, it is difficult to handle, limit Fenton oxidation technology
Application；Ozone oxidation also improves the biodegradability of waste water, therefore smelly while by a part of mineralization of organic material in waste water
Oxygen oxidation connects a stage membrane bioreactor again below（MBR）, it can be improved organic matter removal efficiency, but level-one ozone oxidation-MBR works
Skill, general ozone oxidation retention time of sewage 40-80min, ozone are more applied to depth mineralising organic matter, and with reaction
The extension of time, ozone amount is increasing required for reducing unit COD, deposits that ozone dosage is big, and operating cost is high, ozone money
Source is not used effectively.
It proposes a kind of two-stage ozone oxidation-MBR advanced treatment process, changes the main purpose of ozone oxidation, by ozone oxygen
Change is mainly used for the useless Organic substance in water of mineralising, changes into for the purpose of improving wastewater biochemical, can reduce ozone oxidation waste water and stop
Time and dosage, ozone oxidation is stayed to reduce having in waste water by biochemical aerobic reaction for improving wastewater biodegradability, MBR
Machine object significantly reduces ozone oxidation reaction body product and ozone dosage, reduces relative to traditional ozone oxidation-MBR techniques
Investment cost and operating cost, while advanced treating effect is enhanced, effluent quality is more preferable.
Invention content
In view of the above technical problems, the present invention provides a kind of advanced treatment process for used water difficult to degradate and its it is
System, the technique improve wastewater biodegradability by the way that two-stage ozone oxidation-MBR techniques are arranged, using ozone oxidation, and MBR passes through life
Change the organic matter that aerobic reaction reduces in waste water and it is anti-to significantly reduce ozone oxidation relative to traditional ozone oxidation-MBR techniques
Body product and ozone dosage are answered, reduces investment cost and operating cost, while enhancing advanced treating effect.
To solve the above-mentioned problems, the present invention uses following technical scheme：
A kind of advanced treatment process for used water difficult to degradate, the technique includes the-MBR processing of two-stage ozone oxidation, first by institute
It states after waste water enters level-one ozone Oxidation Treatment raising biodegradability and enters level-one MBR progress biochemical aerobic reactions, remove part
Secondary ozone oxidation processes are entered back into after organic matter to continue to enter secondary MBR depth degradation, level-one and two after improving biodegradability
Grade ozone oxidation tail gas is destroyed through tail gas and supercharging equipment returns to firsts and seconds MBR system and provides air source.
The level-one catalytic ozonation residence time is 5 ~ 15min, and ozone dosage is 20 ~ 40mg/L.
The level-one MBR residence times are 2 ~ 4h, and MLSS is 6000 ~ 12000mg/L.
The secondary ozone catalysis oxidation residence time is 5 ~ 15min, and ozone dosage is 20 ~ 40mg/L.
The secondary MBR residence time is 2 ~ 4h, and MLSS is 6000 ~ 12000mg/L.
The MBR membrane modules use plate membrane, and membrane aperture is preferably 0.01um-0.1um, membrane material PVDF, membrane flux
For 15 ~ 25L/（m2*h）.
The MBR Membrane cleanings period is 3 ~ June；It is 10 ~ 15L/ that membrane module, which is aerated air quantity,（Min* piece films）.
Membrane cleaning liquid is any one of liquor natrii hypochloritis, sodium hydroxide solution or oxalic acid solution；
A concentration of 1000 ~ 5000mg/L of Membrane cleaning liquid.
Water mode is produced using interval production water mode, the production water pump production water time is 5 ~ 10min, and dwell time is 1 ~ 3min, across
Membrane pressure difference is 0 ~ 25kpa.
A kind of processing system for above-mentioned treatment process, the system comprises sequentially connected level-one ozone oxidation lists
Member, level-one MBR unit, secondary ozone oxidation unit and secondary MBR unit；
The level-one ozone oxidation unit and secondary ozone oxidation unit are also connected with vent ozone destructor；
The vent ozone destructor is connected with supercharging equipment；
The supercharging equipment is connected with level-one MBR and secondary MBR.
Compared with prior art, the invention has the advantages that：
1, two-stage ozone oxidation-MBR advanced treatment process changes the main purpose of ozone oxidation, and ozone oxidation is mainly used
Give up Organic substance in water, changed into for the purpose of improving wastewater biochemical in mineralising, can reduce ozone oxidation retention time of sewage and
Ozone dosage, ozone oxidation are reduced organic in waste water for improving wastewater biodegradability, MBE by biochemical aerobic reaction
Object, relative to traditional ozone oxidation-MBR techniques, ozone oxidation reaction body product and ozone dosage reduce by 50% or more, substantially
Ozone oxidation reaction body product and ozone dosage are reduced, reduces investment cost and operating cost, while enhancing depth
Treatment effect, effluent quality are more preferable；
2, ozone oxidation tail gas is rationally utilized, oxygen source is provided for MBR, relative to blast aeration, biochemical aerobic reaction effect
More preferably, operating cost reduces.
Description of the drawings
Fig. 1 is a kind of advanced treatment process flow chart for used water difficult to degradate of the invention.
Specific implementation mode
Technical solution to further illustrate the present invention with reference to the accompanying drawings and examples:
As shown in Figure 1, a kind of advanced treatment process for used water difficult to degradate, it includes-MBR the processing of two-stage ozone oxidation, first
Waste water is entered after level-one ozone Oxidation Treatment improves biodegradability and enters level-one MBR progress biochemical aerobic reactions, removes part
Secondary ozone oxidation processes are entered back into after organic matter to continue to enter secondary MBR depth degradation, level-one and two after improving biodegradability
Grade ozone oxidation tail gas is destroyed through tail gas and supercharging equipment returns to firsts and seconds MBR system and provides air source..
Wherein, the level-one catalytic ozonation residence time be 5 ~ 15min, 5min, 6min, 7min, 8min, 9min,
10min、11min、12min、13min、14min、15min；Ozone dosage is 20 ~ 40mg/L, 20mg/L, 21mg/L, 22mg/
L、25 mg/L、28 mg/L、30 mg/L、32 mg/L、35 mg/L、38 mg/L、40 mg/L；
Wherein, the level-one MBR residence times are 2 ~ 4h, 2h, 3h, 4h, and MLSS is 6000 ~ 12000mg/L, 6000 mg/L, 7000
mg/L、8000 mg/L、9000 mg/L、10000 mg/L、11000 mg/L、12000 mg/L；
Wherein, the secondary ozone catalysis oxidation residence time be 5 ~ 15min, 5min, 6min, 7min, 8min, 9min, 10min,
11min, 12min, 13min, 14min, 15min, ozone dosage are 20 ~ 40mg/L, 20 mg/L, 30 mg/L, 40 mg/L；
Wherein, the secondary MBR residence time is 2 ~ 4h, 2h, 3h, 4h, and MLSS is 6000 ~ 12000mg/L, 6000 mg/L, 7000
mg/L、8000 mg/L、9000 mg/L、10000 mg/L、11000 mg/L、12000 mg/L。
Preferably, it is preferably 0.01um-0.1um that MBR membrane modules, which use plate membrane, membrane aperture, 0.01um, 0.02um,
0.03um, 0.04um, 0.05um, 0.06um, 0.07um, 0.08um, 0.09um, 0.1um, membrane material PVDF, membrane flux are
15~25L/（m2*h）, 15 L/（m2*h）、16 L/（m2*h）、17 L/（m2*h）、18 L/（m2*h）、19 L/（m2*h）、20 L/
（m2*h）、21 L/（m2*h）、22 L/（m2*h）、23 L/（m2*h）、24 L/（m2*h）、25 L/（m2*h）.
The MBR Membrane cleaning periods are 3 ~ June, March, April, May, June；It is 10 ~ 15L/ that membrane module, which is aerated air quantity,（Min* pieces
Film）, 10 L/（Min* piece films）、11 L/（Min* piece films）、12 L/（Min* piece films）、13 L/（Min* piece films）、14 L/
（Min* piece films）、15 L/（Min* piece films）.
Membrane cleaning liquid is any one of liquor natrii hypochloritis, sodium hydroxide solution or oxalic acid solution；Membrane cleaning liquid it is dense
Degree is 1000 ~ 5000mg/L, 1000 mg/L, 2000 mg/L, 3000 mg/L, 4000 mg/L, 5000 mg/L.
MBR membrane modules produce water mode using interval production water mode, production water pump production the water time be 5 ~ 10min, 5min, 6min,
7min, 8min, 9min, 10min, dwell time be 1 ~ 3min, 1min, 2min, 3min, transmembrane pressure be 0 ~ 25kpa, 0 kpa,
1 kpa、2 kpa、3 kpa、4 kpa、5 kpa、8 kpa、9 kpa、10 kpa、15 kpa、18 kpa、20 kpa、21 kpa、
22 kpa、25 kpa。
Processing system applied to above-mentioned advanced treatment process includes sequentially connected level-one ozone oxidation unit, level-one
MBR unit, secondary ozone oxidation unit and secondary MBR unit；Level-one ozone oxidation unit and secondary ozone oxidation unit also with
Vent ozone destructor is connected；Vent ozone destructor is connected with supercharging equipment；Supercharging equipment is connected with level-one MBR and secondary MBR.
Embodiment 1
Certain waste water of paper mill is after biochemistry-coagulating treatment, and COD 150mg/L, B/C ratios are 0.1, using conventional ozone oxidation-
MBR process, ozone oxidation residence time are 1h, and ozone dosage 160mg/L, ozone oxidation water outlet is 80mg/L, B/C
Than being 0.28；The MBR residence times are 5h, and MLSS 8000mg/L, final MBR water outlets are 53mg/L.
Comparative example 1
Waste water is 1 same batch waste water of embodiment, and water quality is with embodiment 1, using level-one ozone oxidation-level-one MBR- secondary ozones
Oxidation-secondary MBR process, wherein level-one ozone oxidation residence time are 10min, ozone dosage 20mg/L, level-one
The MBR residence times are 2h, and sludge concentration 8000mg/L, secondary ozone oxidation residence time is 10min, and ozone dosage is
20mg/L, secondary MBR residence time are 2h, sludge concentration 8000mg/L, and each section of effluent index be as shown in table 1.With embodiment 1
It compares, ozone oxidation total residence time, ozone dosage and MBR residence times are below traditional ozone oxidation-MBR techniques, together
When water outlet COD it is lower.
Embodiment 2
Certain Coking Plant Wastewater is after biochemistry-coagulating treatment, and COD 250mg/L, B/C ratios are 0.12, using conventional ozone oxidation-
MBR process, ozone oxidation residence time are 1h, and ozone dosage 260mg/L, ozone oxidation water outlet is 120mg/L, B/
C ratios are 0.26；The MBR residence times are 6h, and MLSS 10000mg/L, final MBR water outlets are 76mg/L.
Comparative example 2
Waste water is 1 same batch waste water of embodiment, and water quality is with embodiment 1, using level-one ozone oxidation-level-one MBR- secondary ozones
Oxidation-secondary MBR process, wherein level-one ozone oxidation residence time are 15min, ozone dosage 30mg/L, level-one
The MBR residence times are 2h, and sludge concentration 10000mg/L, secondary ozone oxidation residence time is 15min, and ozone dosage is
30mg/L, secondary MBR residence time are 3h, sludge concentration 10000mg/L, and each section of effluent index be as shown in table 2.Same embodiment
1 compares, and ozone oxidation total residence time, ozone dosage and MBR residence times are below traditional ozone oxidation-MBR techniques, together
When water outlet COD it is lower.
Finally it should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although reference
Invention is explained in detail for preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution modify or equivalent replacement, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of advanced treatment process for used water difficult to degradate, which is characterized in that the technique includes two-stage ozone oxidation-
MBR processing first enters the waste water biochemical aerobic into level-one MBR progress after level-one ozone Oxidation Treatment raising biodegradability
It reacts, secondary ozone oxidation processes is entered back into after removal partial organic substances and continue to enter secondary MBR depth after improving biodegradability
Degradation, firsts and seconds ozone oxidation tail gas is destroyed through tail gas and supercharging equipment returns to firsts and seconds MBR system and provides air source.
2. treatment process as described in claim 1, which is characterized in that the level-one catalytic ozonation residence time be 5 ~
15min, ozone dosage are 20 ~ 40mg/L.
3. treatment process as claimed in claim 2, which is characterized in that the level-one MBR residence times are 2 ~ 4h, and MLSS is
6000~12000mg/L。
4. treatment process as described in claim 1, which is characterized in that the secondary ozone catalysis oxidation residence time be 5 ~
15min, ozone dosage are 20 ~ 40mg/L.
5. treatment process as claimed in claim 4, which is characterized in that the secondary MBR residence time is 2 ~ 4h, and MLSS is
6000~12000mg/L。
6. treatment process as claimed in any one of claims 1-5, which is characterized in that the MBR membrane modules use
Plate membrane, membrane aperture are preferably 0.01um-0.1um, and membrane material PVDF, membrane flux is 15 ~ 25L/（m2*h）.
7. treatment process as claimed in claim 6, which is characterized in that the MBR Membrane cleanings period is 3 ~ June；Membrane module exposes
Gas air quantity is 10 ~ 15L/（Min* piece films）.
8. treatment process as claimed in claim 7, which is characterized in that Membrane cleaning liquid is liquor natrii hypochloritis, sodium hydroxide is molten
Any one of liquid or oxalic acid solution；
A concentration of 1000 ~ 5000mg/L of Membrane cleaning liquid.
9. treatment process as claimed in claim 8, which is characterized in that production water mode is using interval production water mode, production water pump production
The water time is 5 ~ 10min, and dwell time is 1 ~ 3min, and transmembrane pressure is 0 ~ 25kpa.
10. a kind of processing system for treatment process described in any claim in 1-9, which is characterized in that the system packet
Include sequentially connected level-one ozone oxidation unit, level-one MBR unit, secondary ozone oxidation unit and secondary MBR unit；
The level-one ozone oxidation unit and secondary ozone oxidation unit are also connected with vent ozone destructor；
The vent ozone destructor is connected with supercharging equipment；
The supercharging equipment is connected with level-one MBR and secondary MBR.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156255A (en) * | 2019-05-10 | 2019-08-23 | 江苏华晖环保科技有限公司 | A kind of hardly possible biochemical waste water advanced treatment system |
| CN111115950A (en) * | 2019-12-23 | 2020-05-08 | 上海世浦泰膜科技有限公司 | double-MBR (membrane bioreactor) method sewage treatment process combined with ozone oxidation |
| CN111792796A (en) * | 2020-07-29 | 2020-10-20 | 金科环境股份有限公司 | Reverse osmosis strong brine processing system |
| CN111807647A (en) * | 2020-08-11 | 2020-10-23 | 苏州聚智同创环保科技有限公司 | Advanced treatment system and method for acrylic acid wastewater |
| CN112125476A (en) * | 2020-09-25 | 2020-12-25 | 中蓝连海设计研究院有限公司 | Two-stage ozone oxidation-biological contact coupling sewage advanced treatment method and device |
| CN112321073A (en) * | 2020-10-21 | 2021-02-05 | 江苏新路德建设有限公司 | Sewage treatment system and method |
| CN112645538A (en) * | 2020-12-14 | 2021-04-13 | 安徽纬纶环保科技有限公司 | Well-flushing waste liquid integrated treatment device |
| CN113292196A (en) * | 2020-12-30 | 2021-08-24 | 清大国华环境集团股份有限公司 | Method and system for treating pesticide wastewater mother liquor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110156255A (en) * | 2019-05-10 | 2019-08-23 | 江苏华晖环保科技有限公司 | A kind of hardly possible biochemical waste water advanced treatment system |
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| CN111792796A (en) * | 2020-07-29 | 2020-10-20 | 金科环境股份有限公司 | Reverse osmosis strong brine processing system |
| CN111807647A (en) * | 2020-08-11 | 2020-10-23 | 苏州聚智同创环保科技有限公司 | Advanced treatment system and method for acrylic acid wastewater |
| CN112125476A (en) * | 2020-09-25 | 2020-12-25 | 中蓝连海设计研究院有限公司 | Two-stage ozone oxidation-biological contact coupling sewage advanced treatment method and device |
| CN112321073A (en) * | 2020-10-21 | 2021-02-05 | 江苏新路德建设有限公司 | Sewage treatment system and method |
| CN112645538A (en) * | 2020-12-14 | 2021-04-13 | 安徽纬纶环保科技有限公司 | Well-flushing waste liquid integrated treatment device |
| CN113292196A (en) * | 2020-12-30 | 2021-08-24 | 清大国华环境集团股份有限公司 | Method and system for treating pesticide wastewater mother liquor |
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Application publication date: 20180928 |