CN106186282B - A method of slowing down sodium hypochlorite original position Membrane cleaning and activated sludge is impacted - Google Patents
A method of slowing down sodium hypochlorite original position Membrane cleaning and activated sludge is impacted Download PDFInfo
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- CN106186282B CN106186282B CN201610667959.XA CN201610667959A CN106186282B CN 106186282 B CN106186282 B CN 106186282B CN 201610667959 A CN201610667959 A CN 201610667959A CN 106186282 B CN106186282 B CN 106186282B
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- sodium hypochlorite
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- 239000012528 membrane Substances 0.000 title claims abstract description 32
- 239000005708 Sodium hypochlorite Substances 0.000 title claims abstract description 31
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004140 cleaning Methods 0.000 title claims abstract description 23
- 239000010802 sludge Substances 0.000 title claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims abstract description 10
- 235000019345 sodium thiosulphate Nutrition 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000011001 backwashing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 239000003610 charcoal Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 230000003116 impacting effect Effects 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052938 sodium sulfate Inorganic materials 0.000 claims 1
- 235000011152 sodium sulphate Nutrition 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000009285 membrane fouling Methods 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000012554 master batch record Methods 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000002503 metabolic effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000008364 bulk solution Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical group CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002163 immunogen Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000013586 microbial product Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- 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
- C02F3/1273—Submerged membrane bioreactors
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- 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
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
- C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Activated Sludge Processes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A method of slowing down sodium hypochlorite original position Membrane cleaning and activated sludge is impacted, including following 4 steps: Powdered Activated Carbon being roasted into 3h in Muffle furnace at 300~400 DEG C, is sieved after cooling spare；Configuration quality concentration is the hypo solution of 20g/L in a reservoir, and the Powdered Activated Carbon after screening is added, the mass concentration ratio of the two is 1:1, sets the Powdered Activated Carbon for stirring in closed container and becoming load sodium thiosulfate for 24 hours；Drying and cooling under nitrogen protection, be fitted into closed container vacuumize it is spare；10min before sodium hypochlorite cleans is implemented using membrane bioreactor, reproducibility active carbon is added, the mass concentration ratio of the two is 2:1.This method significantly reduces membrane fouling rate, improves mud mixed liquid filtrability, has significantly slowed impact of the sodium hypochlorite to activated sludge.
Description
Technical field
The invention belongs to Membrane cleaning technical fields, and in particular to a kind of membrane bioreactor original position film chemical cleaning.
Background technique
There are many merits with membrane bioreactor (MBR) technique that UF membrane and traditional activated sludge process are coupled to form,
Have become the selection of the great competitiveness in wastewater treatment and reuse field.Currently, the MBR Practical Project of China's operation is more than 2000
Seat, is mainly distributed on the hinterland of shortage of water resources and the coastal area of economic height prosperity.For hinterland, selection
MBR technique is to alleviate local shortage of water resources problem because the process sewage can realize Treated sewage reusing；For littoral
Area, current most stringent of emission request can be met by selecting MBR technique to be mostly derived from its water outlet.However film and mud mixed liquid generate
Membrane pollution problem, also improve operating cost while reducing membrane flux, thus fouling membrane caused by MBR is to limit it
The major obstacle of further large-scale promotion application.In the process of running due to MBR technique, the main pollution in mud mixed liquid
Substance, such as dissolubility microbial metabolic products (soluble microbial products, SMP) and extracellular polymeric
(extracellular polymeric substances, EPS) leads to pollution is formed inside and out film to reduce film
Amount, causes the frequent Membrane cleaning of MBR technique.Currently, MBR cleaning way is generally clear using the offline chemistry of online physical cleaning cooperation
It washes, the pollution layer loose for film surface, can be completed online by increasing the physical measures such as aeration quantity, backwash；For film
Internal contamination, can only can just be effectively eliminated by the chemical cleaning under the conditions of offline.Chemical cleaning has heavy workload, changes
It learns cleaning agent to be likely to cause secondary pollution, increase Membrane cleaning expense, reduce the drawbacks such as MBR the degree of automation, and offline clear
The mode of washing affects the continuity of film filtering, is unfavorable for the popularization and application of extensive MBR technique.
In order to realize the original position MBR film chemical cleaning, oxidant is added in backwashing water by domestic and international researcher trial, with
Transmembrane pressure (TMP) or runing time are index, are backwashed to the film of pollution.Result of study shows: sodium hypochlorite is most
Effective cleaning agent, especially to biogenic fouling membrane have efficient removal effect (Water Research, 2014,
53:1-11).However in the process of cleaning, about 50% sodium hypochlorite penetrates into bulk solution (Water by fenestra
Research, 2016,88:293-300), cause microbial activity to reduce, lysis even occurs for part cell, generates a large amount of
EPS and SMP, the filtrability of severe exacerbation sludge mixing, causes membrane fouling rate after the original position MBR Membrane cleaning to increase.In addition, secondary
Sodium chlorate causes microbial adhesion can increase the impact of activated sludge, it is easy to assemble in film surface and increase fouling membrane
(Journal of Membrane Science,2016,511:84-91).Thus, sodium hypochlorite impact not only decontaminates energy to MBR
Power, bioactivity and microbiological paper method have an impact, and can deteriorate mud mixed liquid filtrability, cause serious film dirty
Dye.Effective control measure thus are developed, are to cope with activated sludge in the membrane cleaning process of the original position MBR and be impacted by sodium hypochlorite
Very necessary.
Summary of the invention
The object of the present invention is to propose a kind of method for slowing down sodium hypochlorite original position Membrane cleaning and impacting to activated sludge.Knot
MBR mud mixed liquid characteristic and fouling membrane feature are closed, proposes to add reproducibility Powdered Activated Carbon into reactor, with to greatest extent
Reduce impact of the sodium hypochlorite to activated sludge, to lower cost, realize the steady of Operating ettectiveness after the Membrane cleaning of the original position MBR
It is fixed, improve the deficiency of the existing original position MBR Membrane cleaning technology.
Slow down the method that sodium hypochlorite original position Membrane cleaning impacts activated sludge, by the following technical programs and step gives
It realizes:
(1) Powdered Activated Carbon is roasted at 300~400 DEG C to 3h in Muffle furnace, is sieved after cooling through 100 meshes spare；
(2) hypo solution that configuration quality concentration is 20g/L in brown container, the powder after above-mentioned screening is added
The mass concentration ratio of last active carbon, Powdered Activated Carbon and sodium thiosulfate is 1:1, sets and stirs in closed container for 24 hours, becomes load
The Powdered Activated Carbon of sodium thiosulfate；
(3) Powdered Activated Carbon for taking out load sodium thiosulfate, is dried under nitrogen protection, and it is living to become reproducibility after cooling
Property charcoal, be then charged into black closed container vacuumize it is spare；
(4) 10min before sodium hypochlorite cleans is implemented using membrane bioreactor and the reproducibility active carbon is added, added also
The mass concentration ratio of immunogenic activity charcoal and sodium hypochlorite is 2:1.
Wherein sodium hypochlorite mass concentration range in backwashing water is 1000~3000mg/L.
The beneficial effects of the present invention are, sodium hypochlorite employed in this method, the mass concentration model in backwashing water
Enclose for 1000~3000mg/L:(1) it is treated by the present method after, improve MBR to the removal rate of pollutant, significantly reduce film dirt
Contaminate rate；(2) Powdered Activated Carbon for loading sodium thiosulfate is added to MBR, on the one hand due to the sodium thiosulfate of load and infiltration
Redox reaction occurs for the sodium hypochlorite into bulk solution thoroughly, reduces influence of the oxidant to microorganism；On the other hand
The excellent absorption property of Powdered Activated Carbon reduces SMP and EPS concentration in MBR, improves mud mixed liquid filtrability, reduces
Resistance of membrane filtration；In addition, adding reproducibility Powdered Activated Carbon increases MBR sludge returning, film surface cake layer is increased
Porosity；(3) this method has many advantages, such as easy to operate, at low cost, reliable for operation, without secondary pollution.
Detailed description of the invention
Attached drawing 1 is mixed liquor filtrability comparative diagram after various concentration sodium hypochlorite situ cleaning MBR.
Implement concrete mode
Method and step of the invention is described further below by specific embodiment, and sees that its is excellent in conjunction with attached drawing
Implementation result.It should be noted that following embodiments be it is narrative and infinite, do not limited with the embodiment of the invention
Protection scope.
Embodiment 1:
Using the identical membrane bioreactor (MBR) of 2 sets of specifications, effective volume 5L, hydraulic detention time (HRT) and dirt
The mud residence time (SRT) is respectively 8 hours and 30 days.Wherein MBR-C is control reactor, and it is fixed to add under the conditions of Membrane cleaning in situ
The reactor of amount reproducibility Powdered Activated Carbon is denoted as MBR-PAC；2 sets of reactors water inlet COD (CODcr) fluctuation range is
350-420mg/L, sludge concentration fluctuation range are 6500-7300mg/L.Reactor is stable, to CODcrRemoval rate is more than
95%.When transmembrane pressure (TMP) reaches 30kPa, backwash in situ is carried out to polluted membrane, backwash rate is 5L/m2H is held
The continuous time is 30min, and the mass concentration of sodium hypochlorite is 1000mg/L in backwashing water.
Prepare reproducibility Powdered Activated Carbon first: by Powdered Activated Carbon in Muffle furnace 300 DEG C of roasting 3h, it is cooling through 100
Mesh screening is spare.
Configuration quality concentration is the hypo solution 50mL of 20g/L in brown container, the powder after screening is added
Active carbon 1000mg, sets in closed container and stirs for 24 hours.
The Powdered Activated Carbon for taking out load sodium thiosulfate, is dried under nitrogen protection, becomes reproducibility activity after cooling
Charcoal, be then charged into black closed container vacuumize it is spare.
The 10min before MBR-PAC is cleaned, adds reproducibility active carbon 1000mg to reactor.
Sodium hypochlorite pair is reduced as it can be seen that this method significantly improves the filtrability that sludge mixes with table 1 in conjunction with attached drawing 1
The influence of microbial activity, effectively reduces membrane fouling rate；In addition, from microbial metabolic products concentration comparatively, reduction
Adding for Powdered Activated Carbon of property significantly reduces the output of microbial metabolic products, illustrates this method for slowing down sodium hypochlorite pair
The impact effect of activated sludge is obvious.
1 sodium hypochlorite concentration of table is that 2 sets of MBRs operating index compare after 1000mg/L cleans 6h
| Project | MBR-C | MBR-PAC |
| CODcrRemoval rate (%) | 65 | 87 |
| Sludge activity (O2mg/VSS) | 2.13 | 4.35 |
| SMP(mg/L) | 63.4 | 7.8 |
| EPS(mg/L) | 189 | 152 |
| Membrane fouling rate (kPa/d) | 5.9 | 1.2 |
Embodiment 2:
Using the identical MBRs of 2 sets of specifications, sludge concentration fluctuation range is 9000~11000mg/L, stabilization sub stage operation
Parameter: HRT 6h, SRT 20d, influent CODcrFor 320mg/L~410mg/L, when TMP reaches 30kPa, to polluted membrane into
Row backwash in situ, backwash rate are 5L/m2H, duration 30min, sodium hypochlorite concentration is in backwashing water
2000mg/L。
Reproducibility Powdered Activated Carbon preparation: by Powdered Activated Carbon in Muffle furnace 350 DEG C of roasting 3h.
Configuration quality concentration is the hypo solution 100mL of 20g/L in brown container, the powder after screening is added
Active carbon 2000mg, sets in closed container and stirs for 24 hours.
The reproducibility active carbon for taking out load sodium thiosulfate, is dried under nitrogen protection, and it is living to become reproducibility after cooling
Property charcoal, be fitted into black closed container vacuumize it is spare.
The 10min before MBR-PAC is cleaned, adds reproducibility active carbon 2000mg to reactor.
In conjunction with attached drawing 1 with table 2 as it can be seen that compared with control reactor, the implementation result of this method is significant.
2 sodium hypochlorite concentration of table is that 2 sets of MBRs operating index compare after 2000mg/L cleans 6h
| Project | MBR-C | MBR-PAC |
| CODcrRemoval rate (%) | 52 | 83 |
| Sludge activity (o2mg/VSS) | 1.13 | 3.12 |
| SMP(mg/L) | 85.7 | 11.2 |
| EPS(mg/L) | 239 | 178 |
| Membrane fouling rate (kPa/d) | 8.9 | 2.1 |
Embodiment 3:
Using the identical MBRs of 2 sets of specifications, sewage quality is same as Example 2, sludge concentration fluctuation range be 12000~
14000mg/L, operating parameter: HRT 8h, SRT 40d carry out backwash in situ to polluted membrane when TMP reaches 30kPa,
Backwash rate is 5L/m2H, duration 30min, sodium hypochlorite concentration is 3000mg/L in backwashing water.
Reproducibility Powdered Activated Carbon preparation: by Powdered Activated Carbon in 400 DEG C of roasting 3h in Muffle furnace.
Configuration quality concentration is the hypo solution 150mL of 20g/L in brown container, the powder after screening is added
Active carbon 3000mg, is stirred for 24 hours in closed container.
Powdered Activated Carbon is taken out, is dried under nitrogen protection, becomes reproducibility active carbon after cooling, it is close to be then charged into black
Close in container vacuumize it is spare.
The 10min before MBR-PAC is cleaned, adds reproducibility active carbon 3000mg to reactor.
In conjunction with attached drawing 1 with table 3 as it can be seen that the implementation result of this method is significant.
3 sodium hypochlorite concentration of table is that 2 sets of MBRs operating index compare after 3000mg/L cleans 6h
| Project | MBR-C | MBR-PAC |
| CODcrRemoval rate (%) | 32 | 73 |
| Sludge activity (O2mg/VSS) | 0.25 | 2.13 |
| SMP(mg/L) | 201 | 45 |
| EPS(mg/L) | 198 | 135 |
| Membrane fouling rate (kPa/d) | 11.2 | 3.7 |
Claims (2)
1. a kind of method for slowing down sodium hypochlorite original position Membrane cleaning and being impacted to activated sludge, it is characterized in that this method includes following step
It is rapid:
(1) Powdered Activated Carbon is roasted at 300~400 DEG C to 3h in Muffle furnace, is sieved after cooling through 100 meshes spare；
(2) hypo solution that configuration quality concentration is 20g/L in brown container, the powder after above-mentioned screening is added are living
Property charcoal, the mass concentration ratio of Powdered Activated Carbon and sodium thiosulfate is 1:1, sets and stirs in closed container for 24 hours, becomes sulfur loaded generation
The Powdered Activated Carbon of sodium sulphate；
(3) Powdered Activated Carbon for taking out load sodium thiosulfate, is dried under nitrogen protection, becomes reproducibility activity after cooling
Charcoal, be then charged into black closed container vacuumize it is spare；
(4) 10min before sodium hypochlorite cleans is implemented using membrane bioreactor and the reproducibility active carbon is added, add reproducibility
The mass concentration ratio of active carbon and sodium hypochlorite is 2:1.
2. a kind of method for slowing down sodium hypochlorite original position Membrane cleaning and impacting to activated sludge described in accordance with the claim 1, special
Sign is that sodium hypochlorite mass concentration range in backwashing water is 1000~3000mg/L.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201140987Y (en) * | 2007-09-17 | 2008-10-29 | 张景和 | Water machine |
| CN104609678A (en) * | 2015-02-15 | 2015-05-13 | 广东新大禹环境工程有限公司 | Intelligent sewage treatment system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201140987Y (en) * | 2007-09-17 | 2008-10-29 | 张景和 | Water machine |
| CN104609678A (en) * | 2015-02-15 | 2015-05-13 | 广东新大禹环境工程有限公司 | Intelligent sewage treatment system |
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