CN103880164A - Membrane processing apparatus and processing method for papermaking middle-stage wastewater - Google Patents
Membrane processing apparatus and processing method for papermaking middle-stage wastewater Download PDFInfo
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- CN103880164A CN103880164A CN201210559982.9A CN201210559982A CN103880164A CN 103880164 A CN103880164 A CN 103880164A CN 201210559982 A CN201210559982 A CN 201210559982A CN 103880164 A CN103880164 A CN 103880164A
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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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- Activated Sludge Processes (AREA)
Abstract
The invention relates to a membrane processing apparatus and a processing method for papermaking middle-stage wastewater. The apparatus includes: a biological reaction tank, an inorganic ceramic membrane filtration assembly, a clear liquid pot, a washing pot, a bidirectional frequency conversion pump, a blower and a screw pump, etc. The biology reaction tank is divided into two parts by an overflow weir and the inorganic ceramic membrane filtration assembly is installed in one of the two parts of the biology reaction tank. With an MBR immersed filtering apparatus, the apparatus of the invention is reduced in land occupied area and is small in one-time investment amount. The technology process is simple, is convenient to operate and is high in automatic degree. The processing effect satisfies the requirement of papermaking industrial water. The processed water is more than 78% in COD removal rate, 93% in chroma removal rate and 95% in SS removal rate.
Description
Technical field
The present invention relates to a kind of device and method, relate in particular to a kind of MBR of employing immersion filter plant, floor space reduces, and one-time investment is few; Technical process is simple, good sewage processing effect be applied to papermaking midcourse wastewater membrane treatment appts and treatment process.
Background technology
In sewage disposal, water resources recycling field, MBR claims again membrane bioreactor (Membrane Bio-Reactor), is a kind of new type water treatment technology being combined with biological processing unit by film separation unit.The membrane structure type adopting is mainly flat sheet membrane and hollow-fibre membrane, can be divided into ultra-filtration technique by membrane pore size.
China's paper-making industry adopts reed, wood pulp etc. to do paper making raw material more.The feature of paper-making industrial waste water is that the water yield is large, colourity is high, suspension content is large, organic concentration is high, complicated components, and waste water is difficult to process.In addition, paper waste stink is heavy, foam is many, and consumes in a large number oxygen in water, and severe contamination water source brings very big harm to environment and human health.
Papermaking midcourse wastewater refers to the whole waste water except black liquor that produce in chemical pulping production process, outer row's middle-stage wastewater is to extract the waste water that the boiling slurry after black liquor discharges in pulp washing, screening, bleaching and making beating, owing to dealing with improperly the black liquor of spill and leakage also may blending wherein.This part wastewater flow rate is larger, and principal pollutant are the chlorophenols producing in xylogen and bleaching process.
Along with the growing tension of the raising to environmental requirement and water resources, though current middle-stage wastewater water quality after treatment can reach emission standard, but for the enterprise producing in changing, biochemical treatment may need to extend the biochemical residence time or strengthen dosage for reaching good scrubbing effect, thereby causes the increase of working cost; Simultaneously, most pulp mills of China are take non-wood material (straw pulp) as main, bleach with chlorine bleaching agent, though middle-stage wastewater can standard discharge after second-stage treatment, but residual colourity in waste water is higher, lignin class material is difficult to biological degradation, and chlorophenols is that one-level carcinogens is easy to accumulate in vivo, and environment is had to potential, far-reaching influence; Paper industry is water heavy polluter and water rich and influential family, and the middle-stage wastewater water yield is large, but Pollutant levels are less than black liquor.Along with the significantly raising of water rate, paper industry water expense and effluent charge also can significantly increase.Therefore, seek the especially regeneration feasibility of middle-stage wastewater of paper waste after treatment, " zero release " that realize paper waste has obvious realistic meaning and far-reaching significance.
The papermaking wastewater water yield is large, concentration is high, biodegradability is poor, it is low that the acidication that tradition adopts and biochemical process are processed this class papermaking wastewater clearance, particularly COD and chromaticity removing effect are not high, after processing, COD is at 200～350mg/L, colourity, between 80-160 times, does not reach the corresponding standard of country.
Summary of the invention
For the problems referred to above, main purpose of the present invention is to provide a kind of MBR of employing immersion filter plant, and floor space reduces, and one-time investment is few; Technical process is simple, good sewage processing effect be applied to papermaking midcourse wastewater membrane treatment appts and treatment process.
The present invention solves above-mentioned technical problem by following technical proposals: one is applied to papermaking midcourse wastewater membrane treatment appts, described device comprises biological reaction tank, inorganic ceramic membrane filtration module, clear liquid tank, purge tank, two-way variable frequency pump, gas blower and spiral pump, in biological reaction tank, be provided with the overflow weir that described biological reaction tank is divided into two parts, inorganic ceramic membrane filtration module is arranged in one of them part of above-mentioned two parts, gas blower Fen Liangge branch, on aeration tube between branch and biological reaction tank, biological reaction tank intake valve and tensimeter are installed successively, on another branch of gas blower and the aeration tube being arranged under inorganic ceramic membrane filtration module, membrane module aeration tube tensimeter and membrane module aeration tube intake valve are installed successively.
Clear liquid pressure tank table, clear liquid pipe liquid-outlet valve, two-way variable frequency pump, clear liquid pipe thermometer and clear liquid tank feed valve are installed between inorganic ceramic membrane filtration module and clear liquid tank successively.
Between purge tank and inorganic ceramic membrane filtration module, purge tank bleeder valve and spiral pump are installed.
Clear liquid tank and purge tank bottom are separately installed with clear liquid tank wash water valve and purge tank wash water valve, and two-way variable frequency pump bypass is provided with two-way variable frequency pump wash water valve.
The part that inorganic ceramic membrane filtration module has been installed in biological reaction tank is also provided with a mud discharge line, and described mud discharge line is divided into two, wherein a mud outlet valve is installed on one, and another is provided with sludge reflux valve.
The above-mentioned application of installation of use is in a method for papermaking midcourse wastewater film processing, and described method comprises the steps:
(1), material enters in biological reaction tank, gas blower, biological reaction tank intake valve and membrane module aeration tube inlet open biological reaction tank aeration tube tensimeter and membrane module aeration tube tensimeter control air input are carried out aeration, airborne oxygen dissolves in sewage, make active sludge intermixture produce aerobic metabolic reaction, aeration not only transmits oxygen and enters in mixed solution, and make mixed solution obtain stirring and obtaining suspension liquid fully, make the organism in sewage, oxygen can contact fully with microorganism, reaction, remove the organic chemistry component of solvability and suspension by microbiological deterioration, open two-way variable frequency pump and clear liquid pipe liquid-outlet valve, utilize the negative pressure of its generation by inorganic ceramic membrane filtration module, microorganism to be held back, the water outlet of the clarification obtaining is stored in clear liquid tank, recycling preparation,
(2), in the time that the flux in inorganic ceramic membrane filtration module drops to original flux 80%, adjust two-way variable frequency pump and carry out back flushing;
(3), close clear liquid pipe liquid-outlet valve, open spiral pump and open purge tank bleeder valve and carry out on-line cleaning or off-line and clean;
(4), system is time out of service, opens two-way variable frequency pump wash water valve, clear liquid tank wash water valve and purge tank wash water valve, drains material in system.
Positive progressive effect of the present invention is: the present invention and be existingly similarly applied to papermaking midcourse wastewater membrane treatment appts and treatment process compares, and the present invention adopts MBR immersion filter plant, and floor space reduces, and one-time investment is few; Technical process is simple, easy to operate, and level of automation is high; Treatment effect meets paper industry water, process after COD clearance higher than 78%, chroma removal rate higher than 93%, SS clearance higher than 95%.
Accompanying drawing explanation
Fig. 1 is the structure of apparatus of the present invention and the schematic diagram of technical process.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
Fig. 1 is the structure of apparatus of the present invention and the schematic diagram of technical process, as shown in Figure 1: the present invention includes biological reaction tank 1, inorganic ceramic membrane filtration module 2, clear liquid tank 3, purge tank 4, two-way variable frequency pump 5, gas blower 6 and spiral pump 7, in biological reaction tank 1, be provided with the overflow weir 21 that described biological reaction tank 1 is divided into two parts, inorganic ceramic membrane filtration module 2 is arranged in one of them part of above-mentioned two parts, gas blower 6 Fen Liangge branches, on aeration tube between branch and biological reaction tank 1, biological reaction tank intake valve 12 and tensimeter 8 are installed successively, on another branch of gas blower 6 and the aeration tube being arranged under inorganic ceramic membrane filtration module 2, membrane module aeration tube tensimeter 9 and membrane module aeration tube intake valve 13 are installed successively.
Clear liquid pressure tank table 10, clear liquid pipe liquid-outlet valve 14, two-way variable frequency pump 5, clear liquid pipe thermometer 11 and clear liquid tank feed valve 22 are installed between inorganic ceramic membrane filtration module 2 and clear liquid tank 3 successively.
Purge tank bleeder valve 15 and spiral pump 7 are installed between purge tank 4 and inorganic ceramic membrane filtration module 2.
Clear liquid tank 3 and purge tank 4 bottoms are separately installed with clear liquid tank wash water valve 17 and purge tank wash water valve 20, and two-way variable frequency pump 5 bypasses are provided with two-way variable frequency pump wash water valve 16.
The interior part that inorganic ceramic membrane filtration module 2 has been installed of biological reaction tank 1 is also provided with a mud discharge line, and described mud discharge line is divided into two, wherein a mud outlet valve 19 is installed on one, and another is provided with sludge reflux valve 18.
The above-mentioned application of installation of use is in a method for papermaking midcourse wastewater film processing, and described method comprises the steps:
(1), material enters in biological reaction tank 1, gas blower 6, biological reaction tank intake valve 12 and membrane module aeration tube intake valve 13 are opened biological reaction tank aeration tube tensimeter 8 and membrane module aeration tube tensimeter 9 and are controlled air input and carry out aeration, airborne oxygen dissolves in sewage, make active sludge intermixture produce aerobic metabolic reaction, aeration not only transmits oxygen and enters in mixed solution, and make mixed solution obtain stirring and obtaining suspension liquid fully, make the organism in sewage, oxygen can contact fully with microorganism, reaction, remove the organic chemistry component of solvability and suspension by microbiological deterioration, open two-way variable frequency pump 5, clear liquid pipe liquid-outlet valve 14 and clear liquid tank feed valve 22, utilize the negative pressure of its generation by inorganic ceramic membrane filtration module 2, microorganism to be held back, the water outlet of the clarification obtaining is stored in clear liquid tank 3, recycling preparation,
(2), in the time that the flux in inorganic ceramic membrane filtration module 2 drops to original flux 80%, adjust two-way variable frequency pump 5 and carry out back flushing;
(3), close clear liquid pipe liquid-outlet valve 14, open spiral pump 7 and open that purge tank bleeder valve 15 carries out on-line cleaning or off-line cleans;
(4), system is time out of service, opens two-way variable frequency pump wash water valve 16, clear liquid tank wash water valve 17 and purge tank wash water valve 20, drains material in system.
Be specific embodiment below:
Example 1: papermaking midcourse wastewater treating processes
Most pulp mills of China are take non-wood material (straw pulp) as main, bleach with chlorine bleaching agent, though middle-stage wastewater can standard discharge after second-stage treatment, but residual colourity in waste water is higher, lignin class material is difficult to biological degradation, and chlorophenols is that one-level carcinogens is easy to accumulate in vivo, and environment is had to potential, far-reaching influence.Wherein contain SS=1500mg/L, COD
cr=2000mg/L, BOD
5=700mg/L, after adopting MBR membrane bioreactor to process, clearance all reaches more than 90%.
Filtration procedure:
Material enters in biological reaction tank 1, gas blower 6, biological reaction tank intake valve 12 and membrane module aeration tube intake valve 13 are opened biological reaction tank aeration tube tensimeter 8 and membrane module aeration tube tensimeter 9 and are controlled air input and carry out aeration, remove the organic chemistry component of solvability and suspension by microbiological deterioration, open two-way variable frequency pump 5, clear liquid pipe liquid-outlet valve 14 and clear liquid tank feed valve 22, utilize the negative pressure of its generation by inorganic ceramic membrane filtration module 2, microorganism to be held back, the water outlet of the clarification obtaining is stored in clear liquid tank 3, recycling preparation.
Backwash process:
In the time that flux drops to original flux 80%, adjust two-way variable frequency pump 5 and carry out back flushing.
Cleaning process
Close clear liquid pipe liquid-outlet valve 14, open spiral pump 7 and open purge tank bleeder valve 15 and carry out on-line cleaning or off-line cleaning.
When system is out of service, open two-way variable frequency pump wash water valve 16, clear liquid tank wash water valve 17 and purge tank wash water valve 20, drain material in system.
The present invention adopts MBR immersion filter plant, and floor space reduces, and one-time investment is few; Technical process is simple, easy to operate, and level of automation is high; Treatment effect meets paper industry water, process after COD clearance higher than 78%, chroma removal rate higher than 93%, SS clearance higher than 95%.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. one kind is applied to papermaking midcourse wastewater membrane treatment appts, it is characterized in that: described device comprises biological reaction tank, inorganic ceramic membrane filtration module, clear liquid tank, purge tank, two-way variable frequency pump, gas blower and spiral pump, in biological reaction tank, be provided with the overflow weir that described biological reaction tank is divided into two parts, inorganic ceramic membrane filtration module is arranged in one of them part of above-mentioned two parts, gas blower Fen Liangge branch, on aeration tube between branch and biological reaction tank, biological reaction tank intake valve and tensimeter are installed successively, on another branch of gas blower and the aeration tube being arranged under inorganic ceramic membrane filtration module, membrane module aeration tube tensimeter and membrane module aeration tube intake valve are installed successively.
Clear liquid pressure tank table, clear liquid pipe liquid-outlet valve, two-way variable frequency pump, clear liquid pipe thermometer and clear liquid tank feed valve are installed between inorganic ceramic membrane filtration module and clear liquid tank successively.
Between purge tank and inorganic ceramic membrane filtration module, purge tank bleeder valve and spiral pump are installed.
Clear liquid tank and purge tank bottom are separately installed with clear liquid tank wash water valve and purge tank wash water valve, and two-way variable frequency pump bypass is provided with two-way variable frequency pump wash water valve.
The part that inorganic ceramic membrane filtration module has been installed in biological reaction tank is also provided with a mud discharge line, and described mud discharge line is divided into two, wherein a mud outlet valve is installed on one, and another is provided with sludge reflux valve.
With application of installation claimed in claim 1 in a method for papermaking midcourse wastewater film processing, it is characterized in that: described method comprises the steps:
(1), material enters in biological reaction tank, gas blower, biological reaction tank intake valve and membrane module aeration tube inlet open biological reaction tank aeration tube tensimeter and membrane module aeration tube tensimeter control air input are carried out aeration, airborne oxygen dissolves in sewage, make active sludge intermixture produce aerobic metabolic reaction, aeration not only transmits oxygen and enters in mixed solution, and make mixed solution obtain stirring and obtaining suspension liquid fully, make the organism in sewage, oxygen can contact fully with microorganism, reaction, remove the organic chemistry component of solvability and suspension by microbiological deterioration, open two-way variable frequency pump and clear liquid pipe liquid-outlet valve, utilize the negative pressure of its generation by inorganic ceramic membrane filtration module, microorganism to be held back, the water outlet of the clarification obtaining is stored in clear liquid tank, recycling preparation,
(2), in the time that the flux in inorganic ceramic membrane filtration module drops to original flux 80%, adjust two-way variable frequency pump and carry out back flushing;
(3), close clear liquid pipe liquid-outlet valve, open spiral pump and open purge tank bleeder valve and carry out on-line cleaning or off-line and clean;
(4), system is time out of service, opens two-way variable frequency pump wash water valve, clear liquid tank wash water valve and purge tank wash water valve, drains material in system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210559982.9A CN103880164B (en) | 2012-12-20 | 2012-12-20 | One is applied to papermaking midcourse wastewater membrane treatment appts and treatment process |
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| CN201210559982.9A CN103880164B (en) | 2012-12-20 | 2012-12-20 | One is applied to papermaking midcourse wastewater membrane treatment appts and treatment process |
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| CN103880164B CN103880164B (en) | 2015-08-05 |
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Cited By (3)
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| CN104944572A (en) * | 2015-06-18 | 2015-09-30 | 河海大学 | Ceramic membrane bioreactor and application thereof |
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Families Citing this family (1)
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| CN107298480A (en) * | 2017-07-17 | 2017-10-27 | 中国环境科学研究院 | Pure oxygen aeration system and method |
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| CN103880164B (en) | 2015-08-05 |
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Address after: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee after: SHANGHAI ANHORN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Address before: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee before: SHANGHAI ANHORN MECHANICAL EQUIPMENT Co.,Ltd. |
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Denomination of invention: A membrane treatment device and method for papermaking middle stage wastewater Effective date of registration: 20220621 Granted publication date: 20150805 Pledgee: Shanghai Rural Commercial Bank Co.,Ltd. Pudong branch Pledgor: SHANGHAI ANHORN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: Y2022310000072 |