CN114853284A - Wastewater near-zero emission device and process taking anaerobic MBR and forward osmosis as core - Google Patents
Wastewater near-zero emission device and process taking anaerobic MBR and forward osmosis as core Download PDFInfo
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- CN114853284A CN114853284A CN202210609268.XA CN202210609268A CN114853284A CN 114853284 A CN114853284 A CN 114853284A CN 202210609268 A CN202210609268 A CN 202210609268A CN 114853284 A CN114853284 A CN 114853284A
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F3/28—Anaerobic digestion processes
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a wastewater near-zero emission device and process taking anaerobic MBR and forward osmosis as cores, wherein the device comprises a wastewater collection unit, the wastewater collection unit is connected with an anaerobic MBR unit, the anaerobic MBR unit is respectively connected with a methane utilization unit, a sludge treatment unit and a forward osmosis unit, the forward osmosis unit is respectively connected with a concentrated water evaporation unit and a standard water production recycling or discharging unit, and the concentrated water evaporation unit is respectively connected with the forward osmosis unit, the standard water production recycling or discharging unit and an evaporated crystal treatment unit. The invention takes anaerobic MBR and forward osmosis technology as the core to couple and form a new high-salinity and high-concentration organic wastewater treatment process which has short process flow, short debugging period, convenient start and stop, simple operation and operation maintenance and stable effluent quality, can degrade and recycle organic pollutants into clean energy biogas, and can ensure that the process structure is simple and the produced water reaches the standard and is discharged.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a wastewater near-zero discharge device and process with anaerobic MBR and forward osmosis as cores.
Background
Water pollution has become a serious problem restricting economic development in our country. In particular, the treatment difficulty of high-salt high-concentration organic wastewater (such as landfill leachate, kitchen wastewater, petroleum refining wastewater, desulfurization wastewater and the like) is higher, and it is an important direction for the development of water treatment to discuss how to effectively treat the high-salt high-concentration organic wastewater through a simple process.
The high-salt high-concentration organic wastewater treatment process generally adopts an anaerobic treatment process, an aerobic treatment process and an advanced treatment process, wherein the anaerobic treatment process generally adopts UASB, UBF, IC, EGSB and other processes. The aerobic treatment process generally adopts the processes of 'denitrification + nitrification', SBR, advanced oxidation and the like. The advanced treatment process mainly adopts an advanced treatment system formed by combining one or more technologies of ultrafiltration, nanofiltration, roll type reverse osmosis, disc tube type high-pressure reverse osmosis, chemical softening, evaporation and the like. The treatment process of the high-salt high-concentration organic wastewater is complex, has poor operation stability, large floor area, high investment and operation cost, is easy to generate secondary pollution and the like.
Patent CN213387969U discloses an anaerobic MBR device for high-concentration wastewater, and patent CN206502668U discloses anaerobic MBR treatment equipment for kitchen wastewater, wherein the anaerobic reactor and a built-in hollow fiber membrane component or a built-in flat membrane component are combined, and after the membrane component is polluted, biogas generated in the anaerobic reactor is selected for aeration cleaning. Compared with the invention, the flux of the built-in hollow fiber membrane and the built-in flat membrane is lower, the treatment efficiency is not as good as that of a tubular membrane, pollution control is carried out by using methane, the flow rate of the methane is low, and the flushing efficiency is low due to insufficient flushing force, and meanwhile, the methane flushing has certain danger due to the inflammability and explosiveness of the methane.
Patent CN113603262A discloses a wastewater near-zero discharge process of a gas field flow field cooperative osmosis membrane, which adopts microbubbles and a flocculant as pretreatment, then the pretreated wastewater enters a forward osmosis device, and the hydraulic conditions of different flow fields are used as transmission power to make the wastewater pass through forward osmosis, thereby realizing the reduction of membrane pollution and improving the recovery rate and quality of produced water. The following differences exist with the present invention: (1) this patent mainly adopts microbubble and flocculating agent as the preliminary treatment and reduces the organic matter and to the osmotic membrane pollution, and it has following problem, and this patent has the big running cost high problem of medicine feed volume when organic matter and suspended solid concentration are higher in the waste water. The invention adopts an anaerobic MBR treatment system to treat the organic matters without adding medicaments and aeration operation cost. (2) When the quality of the wastewater changes greatly, the stable operation of normal permeation is greatly influenced when the microbubbles and the flocculation described in the patent cannot be adjusted in time. (3) This patent flocculation and microbubble are handled organic matter and suspended solid and will be produced the dross, and the dross is handled the degree of difficulty and is big, can produce the foul smell when the microbubble is handled, causes the influence to the environment. The anaerobic MBR converts a large amount of organic matters into clean energy biogas, and realizes pollutant recycling while realizing pollutant removal.
Patent CN113480088A discloses a leachate treatment system, including anaerobic treatment subsystem and membrane advanced treatment subsystem, membrane advanced treatment subsystem links to each other with anaerobic treatment subsystem, and membrane advanced treatment subsystem specifically includes sand filter and positive osmosis treatment unit, and the sand filter has first leachate import and first leachate export, and first leachate import links to each other with anaerobic treatment subsystem, and first leachate export links to each other with positive osmosis treatment unit. The leachate treatment system of the patent can shorten the process flow, reduce the operation difficulty and the maintenance cost, and improve the operation efficiency and the leachate treatment efficiency of equipment. The patent adopts the traditional anaerobic process and sand filtration as the pretreatment of the forward osmosis process, and has the problems of low organic matter degradation (namely high organic matter concentration of effluent), high organic matter concentration of effluent, high suspended matter concentration of effluent, high calcium and magnesium hardness content and the like generally existing in the anaerobic process adopted by a leachate treatment system. If the leachate is treated by sand filtration and anaerobic effluent is treated, the problems that effluent does not intercept organic matters, suspended matters are high in sand, dirt is filtered and blocked quickly, the backwashing period is short, the consumed flushing water amount is large and the like exist. These problems have a serious impact on the steady operation of the permeate, which in turn affects the steady operation of the entire percolate treatment system. The invention can completely solve the defects and problems of the patent CN113480088A, and the system operation is more stable and efficient.
Patent CN202110934434.9 discloses an anaerobic self-driven membrane reactor suitable for high COD wastewater treatment and regeneration, comprising an anaerobic reactor, wherein the upper part of the anaerobic reactor is provided with a gas collecting hood, and a gas storage system, a heat exchanger, a fan and a tubular aeration device are connected by a gas guide tube; the water inlet pipe enters the anaerobic reactor through the heat exchanger; a forward osmosis membrane component is arranged in the membrane reactor; the membrane component is connected with the membrane distillation reactor through a liquid-drawing pipe, the liquid-drawing pipe is provided with a temperature and salinity sensor and a liquid-drawing circulating pump, the membrane distillation reactor is connected with a water production tank through a condensing pipe, and a condensing circulating pump is arranged on a cold water pipe at the lower end of the membrane distillation reactor; meanwhile, a dosing unit is matched and sleeved. Embedding the forward osmosis membrane component in an anaerobic membrane reactor to form a permeation filtration mode to relieve membrane pollution. The formed self-driven anaerobic membrane bioreactor ensures high-quality effluent and greatly reduces the energy consumption of operation; meanwhile, the influence of acid gas on the pH value in the biochemical reactor in the gas flushing process can be effectively reduced. This patent will just permeate embedded formation in anaerobic reactor and from driving anaerobic membrane system and have following problem, if guarantee that anaerobic treatment is effectual then need higher sludge concentration, how to avoid the pollution that high sludge concentration brought the membrane system in anaerobic reactor is placed to the forward osmosis membrane subassembly, and the chemical cleaning and the change of just permeating membrane system can bring great influence to anaerobic system in addition. The invention separates anaerobic MBR and forward osmosis into two systems without mutual influence, and realizes the stable operation of the forward osmosis unit while improving the degradation of organic matters.
In summary, the existing high-salt high-concentration organic wastewater treatment process and forward osmosis technology mainly have the following defects:
(1) at present, the conventional high-salt high-concentration organic wastewater treatment process generally adopts an anaerobic membrane system, a biochemical membrane system and a biochemical membrane system, the process flow is long, the workload of system operation and maintenance is large, and the system operation is unstable; (2) at present, in the field of high-salt high-concentration organic wastewater, forward osmosis is generally used for treating concentrated water generated by an anaerobic membrane system, a biochemical membrane system and a membrane system, and the problems of long process flow, large workload of system operation and maintenance, unstable system operation and the like also exist; (3) adopt anaerobism + sand filtration, advanced oxidation, when coagulating + air supporting technology is handled as the preliminary treatment of just permeating technology, it is great to the charge volume of advanced oxidation when there is water quality change big, and also can bring great influence to the steady operation of just permeating when water quality is undulant big, the suspended solid concentration of anaerobism play water is generally higher, when adopting process treatment such as sand filtration or carbon filtration, sand filtration or carbon filtration cause the jam very easily, the backwash cycle is short, and easy scale deposit scheduling problem, it is great to the steady operation influence of just permeating.
Disclosure of Invention
The invention aims to provide a wastewater near-zero emission device and process taking anaerobic MBR and forward osmosis as cores, and the invention uses the anaerobic MBR and forward osmosis technology as cores to be coupled to form a new high-salt high-concentration organic wastewater treatment process which has short process flow, short debugging period, convenient start and stop, simple operation and operation maintenance and stable effluent quality, can degrade and resource organic pollutants into clean energy biogas, can also make the process structure simple, and can discharge the produced water up to the standard, and mainly solves the following problems:
(1) by adopting the novel wastewater treatment process for removing high-salt and high-concentration organic matters by taking anaerobic MBR and forward osmosis as cores, the problems of high difficulty, long process flow, complex operation and control, complex operation and maintenance, high cost, unstable effluent index, large occupied area and the like of the traditional high-salt wastewater treatment of high-concentration organic matters are solved.
(2) Realizing pollution resource utilization. Anaerobic biological treatment is possible to recover (CH) because of less excess sludge, less operating cost 4 ) And the like, but also has the defects of slow growth of microorganisms, large occupied area, poor biological interception effect, higher requirement on temperature and the like. The anaerobic membrane biological process effectively combines a membrane separation technology with anaerobic biological treatment, not only retains the advantages of the anaerobic biological treatment, but also achieves the obvious effects of high-efficiency separation of Hydraulic Retention Time (HRT) and Solid Retention Time (SRT), complete biological interception, stable effluent quality, small occupied area and the like.
(3) Forward osmosis is a membrane separation process which spontaneously realizes water transfer by taking osmotic pressure difference on two sides of a selective osmosis membrane as a driving force, and solves the problems of complex process, rapid membrane pollution, large dosage, high operation energy consumption, large occupied area and the like in the traditional high-salt wastewater treatment process such as reverse osmosis, evaporation and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a wastewater near-zero discharge device taking anaerobic MBR and forward osmosis as a core, which comprises a wastewater collection unit, the wastewater collection unit is connected with the anaerobic MBR unit through the wastewater delivery unit, the anaerobic MBR unit is connected with the biogas utilization unit through the biogas delivery unit, the anaerobic MBR unit is also connected with the sludge treatment unit through the sludge delivery unit, the anaerobic MBR unit is also connected with the forward osmosis unit through the anaerobic MBR water production delivery unit, the forward osmosis unit is connected with the concentrated water evaporation unit through a concentrated water conveying unit of the forward osmosis unit, the forward osmosis unit is also connected with a standard water production recycling or discharging unit through a clear water conveying unit, the concentrated water evaporation unit is connected with the forward osmosis unit through the non-standard evaporation water production return forward osmosis unit, the concentrated water evaporation unit is connected with the standard water production recycling or outward discharge unit through the standard water production conveying unit, and the concentrated water evaporation unit is connected with the evaporation crystal treatment unit through the evaporation crystal conveying unit.
Furthermore, the wastewater collection unit adopts a wastewater collection tank, an adjusting tank, a primary sedimentation tank or a homogenizing tank.
Further, the anaerobic MBR unit adopts a built-in anaerobic MBR or an external anaerobic MBR.
Furthermore, the biogas utilization unit adopts a torch combustion, biogas purification and utilization or biogas power generation and utilization mode.
Further, the sludge treatment unit adopts sludge dewatering, drying and outward transportation.
Furthermore, the forward osmosis unit comprises a forward osmosis membrane unit and a draw solution processing unit, and the draw solution processing unit adopts a membrane concentration processing or evaporation processing mode.
Furthermore, the evaporation of the concentrated water evaporation unit adopts a submerged evaporation mode, an MVR mode, a multi-effect evaporation mode or a low-temperature evaporation mode.
Furthermore, the wastewater conveying unit comprises a conveying pump, a pipeline, a matched valve instrument and the like; the anaerobic MBR produced water conveying unit comprises a conveying pump, a pipeline, a matched valve instrument and the like; the methane conveying unit comprises a pipeline, a matched valve instrument and the like; the sludge conveying unit comprises a sludge conveying pump, a pipeline, a matched valve instrument and the like.
The invention also provides a process for performing near-zero discharge of wastewater by adopting the device and taking anaerobic MBR and forward osmosis as a core, which comprises the following steps:
1) the wastewater is collected and regulated by a wastewater collection unit, and then is conveyed to an anaerobic MBR unit through a wastewater conveying unit to treat organic matters and suspended matters;
2) the produced water treated by the anaerobic MBR unit is conveyed to the forward osmosis unit for disposal through the anaerobic MBR produced water conveying unit, the marsh gas generated by the anaerobic MBR unit is conveyed to the marsh gas utilization unit for comprehensive utilization through the marsh gas conveying unit, and the sludge generated by the anaerobic MBR unit is conveyed to the sludge treatment unit for disposal through the sludge conveying unit;
3) the standard-reaching produced water generated by the forward osmosis unit is conveyed to a standard-reaching produced water recycling or discharging unit through a clear water conveying unit, and the concentrated solution generated by the forward osmosis unit enters a concentrated water evaporation unit through a concentrated water conveying unit of the forward osmosis unit for treatment;
4) unqualified produced water of the concentrated water evaporation unit is continuously treated by the substandard evaporation produced water returning forward osmosis unit, crystalline salt or mother liquor generated by the concentrated water evaporation unit is conveyed to the evaporation crystalline substance treatment unit for treatment by the evaporation crystalline substance conveying unit, and the substandard produced water of the concentrated water evaporation unit is conveyed to the substandard produced water recycling or discharging unit by the substandard produced water conveying unit.
Compared with the prior art, the invention has the following beneficial effects:
the invention combines the high-efficiency anaerobic MBR process technology with the forward osmosis process technology to form a new process, and the new process has the advantages of short treatment process, higher treatment efficiency, short debugging period, high start-stop speed, simple operation and maintenance, no aerobic biochemical system, no biochemical foam problem, no blast aeration system, no biochemical sludge, high system equipment rate, system start and stop immediately, strong system load impact resistance, good stability, high water yield, stable water quality of produced water, environmental friendliness and no secondary pollution basically; the method comprises the following specific steps:
the anaerobic MBR system solves the problem that the high concentration of organic matters in the wastewater is difficult to treat, the conventional anaerobic organic load is low, the COD (chemical oxygen demand) and SS (suspended solids) of the effluent are high, and the like, which influence the normal permeation;
the full-automatic operation of the system can be realized through a new process and instrument control, and the integration and automation degree is high;
the near zero emission of the high-concentration organic matter high-salinity wastewater can be realized through an anaerobic MBR process technology, a forward osmosis process technology and an evaporation process technology.
Drawings
FIG. 1 is a schematic diagram of a wastewater near zero emission device with anaerobic MBR and forward osmosis as the core in example 1 of the present invention;
in the figure: 1-a wastewater collection unit, 2-a wastewater conveying unit, 3-an anaerobic MBR unit, 4-an anaerobic MBR produced water conveying unit, 5-a biogas conveying unit, 6-a biogas utilization unit, 7-a sludge treatment unit, 8-a sludge conveying unit, 9-a forward osmosis unit, 10-a forward osmosis unit concentrated water conveying unit, 11-a concentrated water evaporation unit, 12-an substandard evaporation produced water return forward osmosis unit, 13-an evaporation crystal conveying unit, 14-a standard produced water conveying unit, 15-a clear water conveying unit, 16-an evaporation crystal treatment unit, and 17-a standard produced water recycling or discharging unit.
Detailed Description
The embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention. In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted.
Example 1
The schematic diagram of the wastewater near-zero emission device taking anaerobic MBR and forward osmosis as the core is shown in FIG. 1, wherein the anaerobic MBR refers to an anaerobic membrane bioreactor, the device comprises a wastewater collection unit 1, the wastewater collection unit 1 is connected with an anaerobic MBR unit 3 through a wastewater delivery unit 2, the wastewater collection unit 1 adopts a wastewater collection tank, an adjusting tank, a primary sedimentation tank or a homogenizing tank, the wastewater delivery unit 2 comprises a delivery pump, a pipeline, a matched valve instrument and the like, the anaerobic MBR unit 3 adopts a built-in anaerobic MBR or an external anaerobic MBR, is connected with a biogas utilization unit 6 through a biogas delivery unit 5, the biogas delivery unit 5 comprises a pipeline, a matched valve instrument and the like, the biogas utilization unit 6 adopts a torch combustion, biogas purification utilization or biogas power generation utilization mode, the anaerobic MBR unit 3 is further connected with a sludge treatment unit 7 through a sludge delivery unit 8, the sludge treatment unit 7 adopts sludge dewatering drying outward transportation, the sludge conveying unit 8 comprises a sludge conveying pump, a pipeline, a matched valve instrument and the like, the anaerobic MBR unit 3 is also connected with the forward osmosis unit 9 through the anaerobic MBR water production conveying unit 4, the anaerobic MBR water production conveying unit 4 comprises a conveying pump, a pipeline, a matched valve instrument and the like, the forward osmosis unit 9 comprises a forward osmosis membrane unit and a drawing liquid treatment unit, the drawing liquid treatment unit adopts a membrane concentration treatment or evaporation treatment mode, the forward osmosis unit 9 is connected with the concentrated water evaporation unit 11 through the forward osmosis unit concentrated water conveying unit 10, the forward osmosis unit 9 is also connected with the standard water production recycling or outward discharge unit 17 through the clear water conveying unit 15, the evaporation of the concentrated water evaporation unit 11 adopts an immersion evaporation, MVR, multiple-effect evaporation or low-temperature evaporation mode, the concentrated water evaporation unit 11 is connected with the forward osmosis unit 9 through the substandard evaporation water return forward osmosis unit 12, the concentrated water evaporation unit 11 is also connected with the substandard water production recycling or discharging unit 17 through the substandard water production conveying unit 14, and the concentrated water evaporation unit 11 is also connected with the evaporation crystal treatment unit 16 through the evaporation crystal conveying unit 13.
The process for realizing near-zero emission of wastewater by adopting the device and taking anaerobic MBR and forward osmosis as cores comprises the following steps:
1) the wastewater is collected and regulated by a wastewater collection unit 1, and then is conveyed to an anaerobic MBR unit 3 through a wastewater conveying unit 2 to treat organic matters and suspended matters;
2) the produced water treated by the anaerobic MBR unit 3 is conveyed to a forward osmosis unit 9 for disposal through an anaerobic MBR produced water conveying unit 4, the marsh gas generated by the anaerobic MBR unit 3 is conveyed to a marsh gas utilization unit 6 for comprehensive utilization through a marsh gas conveying unit 5, and the sludge generated by the anaerobic MBR unit 3 is conveyed to a sludge treatment unit 7 for disposal through a sludge conveying unit 8;
3) the standard-reaching produced water generated by the forward osmosis unit 9 is conveyed to a standard-reaching produced water recycling or discharging unit 17 through a clear water conveying unit 15, and the concentrated solution generated by the forward osmosis unit 9 enters a concentrated water evaporation unit 11 through a concentrated water conveying unit 10 for treatment;
4) unqualified produced water of the concentrated water evaporation unit 11 is continuously treated by the unqualified evaporated produced water returning forward osmosis unit 12, crystallized salt or mother liquor generated by the concentrated water evaporation unit 11 is conveyed to an evaporated crystal treatment unit 16 for treatment by an evaporated crystal conveying unit 13, and qualified produced water of the concentrated water evaporation unit 11 is conveyed to a qualified produced water recycling or discharging unit 17 by a qualified produced water conveying unit 14.
The invention combines the high-efficiency anaerobic MBR process technology with the forward osmosis process technology to form a new process, and the new process has the advantages of short treatment process, higher treatment efficiency, short debugging period, high start-stop speed, simple operation and maintenance, no aerobic biochemical system, no biochemical foam problem, no blast aeration system, no biochemical sludge, high system equipment rate, system start and stop immediately, strong system load impact resistance, good stability, high water yield, stable water quality of produced water, environmental friendliness and no secondary pollution basically; the method comprises the following specific steps:
the anaerobic MBR system solves the problem that the high concentration of organic matters in the wastewater is difficult to treat, the conventional anaerobic organic load is low, the COD (chemical oxygen demand) and SS (suspended solids) of the effluent are high, and the like, which influence the normal permeation;
the full-automatic operation of the system can be realized through a new process and instrument control, and the integration and automation degree is high;
the near zero emission of the high-concentration organic matter high-salinity wastewater can be realized through an anaerobic MBR process technology, a forward osmosis process technology and an evaporation process technology.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features thereof can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an use nearly zero release device of waste water of anaerobism MBR and forward osmosis as core which characterized in that: comprises a wastewater collection unit (1), the wastewater collection unit (1) is connected with an anaerobic MBR unit (3) through a wastewater conveying unit (2), the anaerobic MBR unit (3) is connected with a biogas utilization unit (6) through a biogas conveying unit (5), the anaerobic MBR unit (3) is also connected with a sludge treatment unit (7) through a sludge conveying unit (8), the anaerobic MBR unit (3) is also connected with a forward osmosis unit (9) through an anaerobic MBR produced water conveying unit (4), the forward osmosis unit (9) is connected with a concentrated water evaporation unit (11) through a forward osmosis unit concentrated water conveying unit (10), the forward osmosis unit (9) is also connected with a standard produced water recycling or an outer discharge unit (17) through a clear water conveying unit (15), the concentrated water evaporation unit (11) is connected with the forward osmosis unit (9) through a non-standard evaporation produced water forward osmosis unit (12), the concentrated water evaporation unit (11) is also connected with a standard water production recycling or discharging unit (17) through a standard water production conveying unit (14), and the concentrated water evaporation unit (11) is also connected with an evaporative crystal treatment unit (16) through an evaporative crystal conveying unit (13).
2. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the wastewater collection unit (1) adopts a wastewater collection tank, an adjusting tank, a primary sedimentation tank or a homogenizing tank.
3. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the anaerobic MBR unit (3) adopts built-in anaerobic MBR or external anaerobic MBR.
4. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the biogas utilization unit (6) adopts a torch combustion, biogas purification and utilization or biogas power generation and utilization mode.
5. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the sludge treatment unit (7) adopts sludge dehydration drying and outward transportation.
6. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the forward osmosis unit (9) comprises a forward osmosis membrane unit and a draw solution processing unit, and the draw solution processing unit adopts a membrane concentration processing or evaporation processing mode.
7. The anaerobic MBR and forward osmosis based wastewater near-zero emission device of claim 1, wherein: the evaporation of the concentrated water evaporation unit (11) adopts a submerged evaporation mode, an MVR mode, a multi-effect evaporation mode or a low-temperature evaporation mode.
8. A process for near zero emission of wastewater with anaerobic MBR and forward osmosis core using the apparatus of any one of claims 1-7, characterized by: the method comprises the following steps:
1) the method comprises the following steps that firstly, waste water is collected and adjusted by a waste water collecting unit (1), and then is conveyed to an anaerobic MBR unit (3) through a waste water conveying unit (2) to treat organic matters and suspended matters;
2) the produced water treated by the anaerobic MBR unit (3) is conveyed to a forward osmosis unit (9) for disposal through an anaerobic MBR produced water conveying unit (4), biogas generated by the anaerobic MBR unit (3) is conveyed to a biogas utilization unit (6) for comprehensive utilization through a biogas conveying unit (5), and sludge generated by the anaerobic MBR unit (3) is conveyed to a sludge treatment unit (7) for disposal through a sludge conveying unit (8);
3) the standard-reaching produced water generated by the forward osmosis unit (9) is conveyed to a standard-reaching produced water recycling or discharging unit (17) through a clear water conveying unit (15), and concentrated liquid generated by the forward osmosis unit (9) enters a concentrated water evaporation unit (11) through a forward osmosis unit concentrated water conveying unit (10) for treatment;
4) unqualified produced water of the concentrated water evaporation unit (11) is continuously treated by the substandard evaporation produced water return forward osmosis unit (12), crystallized salt or mother liquor generated by the concentrated water evaporation unit (11) is conveyed to the evaporation crystal treatment unit (16) for treatment by the evaporation crystal conveying unit (13), and the substandard produced water of the concentrated water evaporation unit (11) is conveyed to the substandard produced water recycling or discharging unit (17) by the substandard produced water conveying unit (14).
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| CN103332835A (en) * | 2013-07-29 | 2013-10-02 | 哈尔滨工业大学 | Anaerobic membrane bioreactor and forward-osmosis reverse-osmosis combined sewage treatment system |
| CN109734236A (en) * | 2019-03-05 | 2019-05-10 | 上海缘脉环境科技有限公司 | A kind of positive osmosis concentration technique of landfill leachate |
| CN110697974A (en) * | 2019-09-30 | 2020-01-17 | 北京科技大学 | Integrated device for treating human black water by applying dynamic membrane anaerobic MBR-forward osmosis technology |
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2022
- 2022-05-31 CN CN202210609268.XA patent/CN114853284A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332835A (en) * | 2013-07-29 | 2013-10-02 | 哈尔滨工业大学 | Anaerobic membrane bioreactor and forward-osmosis reverse-osmosis combined sewage treatment system |
| CN109734236A (en) * | 2019-03-05 | 2019-05-10 | 上海缘脉环境科技有限公司 | A kind of positive osmosis concentration technique of landfill leachate |
| CN110697974A (en) * | 2019-09-30 | 2020-01-17 | 北京科技大学 | Integrated device for treating human black water by applying dynamic membrane anaerobic MBR-forward osmosis technology |
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