CN110577325A - Processing system of high salt high organic matter waste water resourceization and zero release - Google Patents
Processing system of high salt high organic matter waste water resourceization and zero release Download PDFInfo
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- CN110577325A CN110577325A CN201910735886.7A CN201910735886A CN110577325A CN 110577325 A CN110577325 A CN 110577325A CN 201910735886 A CN201910735886 A CN 201910735886A CN 110577325 A CN110577325 A CN 110577325A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 69
- 239000005416 organic matter Substances 0.000 title claims abstract description 24
- 150000003839 salts Chemical class 0.000 title claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 213
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000004821 distillation Methods 0.000 claims abstract description 88
- 239000010802 sludge Substances 0.000 claims abstract description 65
- 238000002425 crystallisation Methods 0.000 claims abstract description 38
- 230000008025 crystallization Effects 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 238000001704 evaporation Methods 0.000 claims abstract description 18
- 230000008020 evaporation Effects 0.000 claims abstract description 18
- 238000004064 recycling Methods 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000005273 aeration Methods 0.000 claims description 44
- 238000005192 partition Methods 0.000 claims description 44
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 6
- 239000012510 hollow fiber Substances 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002440 industrial waste Substances 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 239000007787 solid Substances 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
-
- 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- 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
Abstract
the invention discloses a high-salinity high-organic matter wastewater recycling and zero-emission treatment system which comprises a regulating reservoir, an integrated aerobic granular sludge membrane bioreactor, a membrane distillation unit and an evaporative crystallization unit. The regulating reservoir stabilizes quality of water volume and deposits partial suspended solid, and most suspended solid and organic matter in the integrated good oxygen granule sludge membrane bioreactor gets rid of the waste water, and the ion and partial remaining organic matter in the waste water are got rid of to the membrane distillation unit, and evaporation crystallization unit handles membrane distillation dense water, evaporation recovery water resource, and the salt solid in the membrane distillation dense water is retrieved in the crystallization, finally realizes the purpose of high organic matter waste water resource of high salt and salt resource recycle and waste water zero release. The method can effectively solve the problems of resource utilization and zero emission of the high-salt high-organic-matter wastewater, recover water resources and salt resources to the maximum extent, realize zero emission in the production process of the high-salt high-organic matter, and have important environmental benefits.
Description
Technical Field
The invention relates to the field of industrial wastewater treatment, in particular to a recycling and zero-emission treatment system for high-salinity high-organic wastewater, including shale gas wastewater and the like.
Background
The industrial development brings a large amount of high-salt and high-organic wastewater, such as shale gas wastewater generated in the shale gas exploitation process, the concentration of COD can reach 8000mg/L, the TDS can reach 88-300g/L, wherein, Ca2+The concentration of the sodium-containing phosphate can reach 41g/L, Na+The concentration of (C) can be as high as 136g/L, Cl-the concentration of (A) is up to 200 g/L.
the high-salinity high-organic-matter wastewater is difficult to be treated by the conventional biological treatment technology, the high cost and high membrane pollution in the membrane technology treatment process also inhibit the recovery and utilization of the high-salinity high-organic-matter wastewater, and how to design a reasonable treatment mode to recover water resources and salt resources in the high-salinity high-organic-matter wastewater achieves the purposes of zero emission and resource utilization, thereby becoming a hot spot in the world at present.
disclosure of Invention
The invention aims to provide a treatment system for recycling and zero emission of high-salinity high-organic wastewater.
The technical scheme adopted for achieving the aim of the invention is that the high-salinity high-organic-matter wastewater recycling and zero-emission treatment system comprises a regulating tank, an integrated aerobic granular sludge membrane bioreactor, a membrane distillation unit and an evaporative crystallization unit.
The regulating tank is connected with the integrated aerobic granular sludge membrane bioreactor. The integrated aerobic granular sludge membrane bioreactor is connected with the membrane distillation unit. The membrane distillation unit is connected with the evaporative crystallization unit.
During operation, high-salinity high-organic matter wastewater enters the regulating tank, and part of suspended matters in the wastewater are precipitated in the regulating tank. And the produced water of the regulating tank enters the integrated aerobic granular sludge membrane bioreactor, and the integrated aerobic granular sludge membrane bioreactor removes partial organic matters and residual suspended matters in the wastewater. And the produced water of the integrated aerobic granular sludge membrane bioreactor enters a membrane distillation unit, and the membrane distillation unit removes ions and residual organic matters in the wastewater to obtain membrane distillation produced water and membrane distillation concentrated water. And the membrane distillation produced water is recycled or discharged after reaching the standard. And the membrane distillation concentrated water enters an evaporation crystallization unit, and the evaporation crystallization unit carries out evaporation crystallization treatment on the membrane distillation concentrated water to obtain crystals and water produced by evaporation crystallization. The crystals are used for chemical plant recovery. And the water produced by the evaporative crystallization is recycled or discharged after reaching the standard.
Furthermore, the bottom parts of the regulating tank and the integrated aerobic granular sludge membrane bioreactor are respectively provided with a sludge outlet pipe, and sediments in the regulating tank and the integrated aerobic granular sludge membrane bioreactor are discharged through the sludge outlet pipes.
Furthermore, the integrated aerobic granular sludge membrane bioreactor is a rectangular box body with an open upper end, aerobic granular sludge is filled in the rectangular box body, and a partition plate I and a partition plate II which are parallel to each other are vertically arranged in the rectangular box body. A plurality of through holes are formed in the partition plate I.
The partition board I divides the internal space of the rectangular box body into two parts, the bottom parts of the two parts of space are connected into the aeration pipes, one part of space is a membrane separation area F provided with a membrane assembly, and the other part of space is divided into a contact reaction area D and an aeration reaction area E by the partition board II. And the aeration reaction area E is positioned between the partition plate I and the partition plate II.
A gap exists between the lower end of the partition plate II and the bottom of the rectangular box body, and the upper end of the partition plate II is lower than that of the partition plate I.
the contact reaction area D is connected with a water inlet pipe. The membrane module discharges water in the membrane module through a drain pipe.
furthermore, the bottoms of the aeration reaction zone E and the membrane separation zone F are both provided with microporous aeration discs, and the microporous aeration discs are connected into aeration pipes. The aeration pipe is supplied with air by an air compressor, and the volume ratio of the air to the water is 15: 1-30: 1.
Furthermore, the outlet end of the drain pipe is connected with a pipe fitting I and a pipe fitting II respectively. The pipe fitting I is communicated with a water inlet pipe. And the pipe II is communicated with the membrane distillation unit.
One part of the outlet water of the membrane module returns to the contact reaction zone D through the pipe fitting I to dilute COD in the inlet water, the other part of the outlet water enters the membrane distillation unit through the pipe fitting II, and the integrated aerobic granular sludge membrane bioreactor treats continuous and efficient organic matters.
Further, the membrane module adopts an external pressure type membrane module, an immersion type membrane module, a hollow fiber curtain type membrane module or a plate-and-frame type membrane module. The membrane material of the membrane component is polysulfone, polyacrylonitrile, polyvinylidene fluoride or polytetrafluoroethylene, and the pore diameter range of the membrane is 0.1-0.4 mu m.
Furthermore, the membrane material of the membrane distillation component of the membrane distillation unit is polyvinylidene fluoride, polytetrafluoroethylene or polypropylene, and the membrane aperture range is 0.15-0.2 μm.
Furthermore, the membrane distillation components of the membrane distillation unit are a group, a plurality of groups connected in series or a plurality of groups connected in parallel, and the membrane distillation components are in a hollow fiber type or a plate type.
the operating conditions of the membrane distillation unit include: the pH value of the wastewater on the feed liquid side is 7-9, the temperature of the wastewater on the feed liquid side is 60-80 ℃, the flow rate of the membrane surface on the feed liquid side is 0.6-1.2 m/s, and the vacuum degree on the permeate side is-0.095-0.075 MPa.
Further, the heat source of the membrane distillation unit is industrial waste heat or electric heating.
Furthermore, the evaporative crystallization unit adopts an evaporative crystallizer, and a heat source of the evaporative crystallizer adopts waste steam heating or electric heating.
The invention has the beneficial effects that:
1. The invention recovers water resources and salt resources to the maximum extent, solves the problems of resource utilization and zero emission of the high-salt high-organic-matter wastewater, and simultaneously reduces the treatment cost to a certain extent by resource utilization of the high-salt high-organic-matter wastewater;
2. The integrated aerobic granular sludge membrane bioreactor fully utilizes the advantages that the integrated aerobic granular sludge membrane bioreactor can tolerate high suspended matter, high salt and high organic matter wastewater, removes most suspended matter and organic matter in the wastewater through the integrated aerobic granular sludge membrane bioreactor, reduces the content of the organic matter in the high salt and high organic matter wastewater, reduces the possibility of membrane pollution in the membrane distillation process, and is convenient for the subsequent membrane distillation treatment;
3. The membrane distillation process in the invention does not need external pressure or has small external pressure, and the method is simple and easy to operate;
4. The membrane pollution in the membrane distillation process is light, and the continuous and stable running time of the process is prolonged;
5. the invention effectively integrates the advantages of each technology, has good effluent quality and lower operating cost compared with single membrane treatment or biological treatment, effectively reduces scaling and organic pollution, truly achieves the purposes of resource utilization and zero emission of high-salinity high-organic wastewater, and simultaneously recycles salt resources and water resources in the high-salinity high-organic wastewater.
Drawings
FIG. 1 is a process flow diagram of resource utilization and zero discharge of high-salinity high-organic wastewater;
FIG. 2 is a schematic view of an integrated aerobic granular sludge membrane bioreactor.
in the figure: the device comprises a partition plate I1, a partition plate II 2, a membrane component 3, an aeration pipe 4, a water inlet pipe 5, a water outlet pipe 6, a microporous aeration disc 8, an air compressor 9, a pipe fitting I10, a vacuum pump I102, a pipe fitting II 11 and a vacuum pump II 112.
Detailed Description
the present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
example 1:
The embodiment discloses a treatment system for recycling and zero emission of high-salt high-organic wastewater, which comprises a regulating reservoir, an integrated aerobic granular sludge membrane bioreactor, a membrane distillation unit and an evaporative crystallization unit.
The regulating tank is connected with the integrated aerobic granular sludge membrane bioreactor. And sludge outlet pipes are arranged at the bottom of the regulating tank and the bottom of the integrated aerobic granular sludge membrane bioreactor.
because the water quality or the water quantity fluctuation of some high-salinity high-organic matter wastewater is large, the regulating reservoir can be utilized to stabilize the water quality and the water quantity, part of suspended matters are precipitated, and a sludge outlet pipe at the bottom of the regulating reservoir is used for periodic sludge discharge.
Referring to fig. 2, the integrated aerobic granular sludge membrane bioreactor is a rectangular box body with an open upper end, aerobic granular sludge is filled in the rectangular box body, and a partition plate I1 and a partition plate II 2 which are parallel to each other are vertically arranged in the rectangular box body. A plurality of through holes are formed in the partition plate I1. A gap exists between the lower end of the partition plate II 2 and the bottom of the rectangular box body, and the upper end of the partition plate II 2 is lower than that of the partition plate I1.
The partition plate I1 divides the internal space of the rectangular box body into two parts, wherein one part of the space is a membrane separation area F provided with a membrane module 3, and the other part of the space is divided into a contact reaction area D and an aeration reaction area E by a partition plate II 2. And the aeration reaction area E is positioned between the partition plate I1 and the partition plate II 2.
Referring to fig. 2, the bottom of the aeration reaction zone E and the bottom of the membrane separation zone F are both provided with microporous aeration discs 8, and the microporous aeration discs 8 are connected with aeration pipes 4. The aeration pipe 4 is supplied with air by an air compressor 9, and the volume ratio of the air to the water is 15: 1-30: 1.
The contact reaction area D is connected with a water inlet pipe 5. The effluent of the regulating reservoir is discharged into the contact reaction zone D through a water inlet pipe 5.
Referring to fig. 2, the membrane module 3 is connected with a drain pipe 6. The outlet end of the drain pipe 6 is connected with a pipe fitting I10 and a pipe fitting II 11 respectively.
The pipe I10 is communicated with the water inlet pipe 5, and pressure is provided by a vacuum pump I102.
The pipe II 11 is communicated with the membrane distillation unit, and the vacuum pump II 112 provides pressure.
referring to fig. 2, a part of the effluent of the membrane module 3 returns to the contact reaction zone D through a pipe fitting i 10 to dilute COD in the influent, and the other part of the effluent enters the membrane distillation unit through a pipe fitting ii 11, and the integrated aerobic granular sludge membrane bioreactor treats continuous and efficient organic matters.
in the present embodiment, the membrane module 3 is an immersion type membrane module. The membrane material of the membrane component 3 is polysulfone, and the pore diameter range of the membrane is 0.1-0.4 μm. The inoculated sludge of the integrated aerobic granular sludge membrane bioreactor can be inoculated in the reactor only after 3-15 days of aeration, high water inlet load and high inorganic salt concentration pre-culture and a large amount of filamentous bacteria are generated.
the integrated aerobic granular sludge membrane bioreactor is connected with the membrane distillation unit. In the embodiment, the membrane material of the membrane distillation component of the membrane distillation unit is polyvinylidene fluoride, and the pore diameter of the membrane is in the range of 0.15-0.2 μm. The membrane distillation components of the membrane distillation unit are connected in parallel, and the membrane distillation components are in a hollow fiber type.
The operating conditions of the membrane distillation unit include: the pH value of the wastewater on the feed liquid side is 7-9, the temperature of the wastewater on the feed liquid side is 60-80 ℃, the flow rate of the membrane surface on the feed liquid side is 0.6-1.2 m/s, and the vacuum degree on the permeate side is-0.095-0.075 MPa. The heat source of the membrane distillation unit is industrial waste heat.
The membrane distillation unit is connected with the evaporative crystallization unit. The evaporative crystallization unit adopts an evaporative crystallizer, and a heat source of the evaporative crystallizer adopts waste steam for heating.
Referring to fig. 1, in operation, high-salinity high-organic wastewater enters the regulating tank, and part of suspended matters in the wastewater are precipitated in the regulating tank.
The produced water of the regulating reservoir enters the integrated aerobic granular sludge membrane bioreactor through the water inlet pipe 5, most organic matters in the wastewater are removed through the microbial degradation, most suspended matters are also removed in the membrane filtration process, and finally the wastewater with very low COD and suspended matter content can be obtained. The step can reduce the load of the subsequent membrane distillation treatment, reduce the possibility of membrane pollution and maintain the higher water treatment capacity of the membrane distillation.
specifically, the inlet water of the integrated aerobic granular sludge membrane bioreactor is mixed with the return water of the aeration reaction zone E at the contact reaction zone D. The operation condition of the integrated aerobic granular sludge membrane bioreactor is set as continuous flow operation, the operation temperature is controlled to be 20-40 ℃, and the pH value of liquid in the reactor is controlled to be 6.0-9.0. And the wastewater in the contact reaction zone D enters the aeration reaction zone E from the bottom gap of the partition plate II 2, and pollutants in the wastewater are treated through the aerobic granular sludge microbial degradation. The air compressor 9 supplies air continuously, and the compressed air supplies oxygen to the reactor through the microporous aeration disc 8 at the bottom of the aeration reaction area E. The aeration intensity of the aeration reaction zone E is controlled to be 0.1-3.0m3And h, controlling the aeration intensity of the membrane separation area F to be 20: 1-40: 1 of gas-water ratio. After being treated by aerobic granular sludge in the aeration reaction zone E, the wastewater enters the membrane separation zone F through a plurality of through holes on the partition plate I1. The wastewater entering the membrane separation area F is filtered by the membrane component 3, and the microporous aeration disc 8 is used for aerating and washing the membrane component 3, so that the treated water is obtained. A part of the treated water of the membrane module 3 returns to the contact reaction zone D through a pipe I10 and a vacuum pump I102, and the other part of the treated water enters the membrane distillation unit through a pipe II 11 and a vacuum pump II 112. The treated water reflux ratio of the membrane component 3 can be adjusted according to the actual water quality, so that the concentration of organic matters can be diluted, and the cost of subsequent membrane treatment and evaporative crystallization is reduced.
And the produced water of the integrated aerobic granular sludge membrane bioreactor enters a membrane distillation unit, and the membrane distillation unit removes ions and residual organic matters in the wastewater to obtain membrane distillation produced water and membrane distillation concentrated water. And the membrane distillation produced water is recycled or discharged after reaching the standard. The membrane distillation concentrated water contains high-concentration enriched inorganic salt ions, the membrane distillation concentrated water enters an evaporation crystallization unit, the evaporation crystallization unit carries out evaporation crystallization treatment on the membrane distillation concentrated water to obtain salt crystals and water produced by evaporation crystallization, the salt crystals are a collection of various inorganic salts, and the inorganic salts such as sodium chloride and calcium chloride can be further processed and recycled subsequently, so that the purpose of recycling the inorganic salts is achieved. And the water produced by evaporative crystallization is recycled or discharged up to the standard, and finally the aim of zero discharge of the high-salinity high-organic-matter wastewater is fulfilled.
Example 2:
The embodiment discloses a treatment system for recycling and zero emission of high-salt high-organic wastewater, which comprises a regulating reservoir, an integrated aerobic granular sludge membrane bioreactor, a membrane distillation unit and an evaporative crystallization unit.
referring to fig. 1, the regulating reservoir is connected with an integrated aerobic granular sludge membrane bioreactor. The integrated aerobic granular sludge membrane bioreactor is connected with the membrane distillation unit. The membrane distillation unit is connected with the evaporative crystallization unit.
During operation, high-salinity high-organic matter wastewater enters the regulating tank, and part of suspended matters in the wastewater are precipitated in the regulating tank. And the produced water of the regulating tank enters the integrated aerobic granular sludge membrane bioreactor, and the integrated aerobic granular sludge membrane bioreactor removes partial organic matters and residual suspended matters in the wastewater. And the produced water of the integrated aerobic granular sludge membrane bioreactor enters a membrane distillation unit, and the membrane distillation unit removes ions and residual organic matters in the wastewater to obtain membrane distillation produced water and membrane distillation concentrated water. And the membrane distillation produced water is recycled or discharged after reaching the standard. And the membrane distillation concentrated water enters an evaporation crystallization unit, and the evaporation crystallization unit carries out evaporation crystallization treatment on the membrane distillation concentrated water to obtain crystals and water produced by evaporation crystallization. The crystals are used for chemical plant recovery. And the water produced by the evaporative crystallization is recycled or discharged after reaching the standard.
Example 3:
The main structure of this embodiment is the same as that of embodiment 2, and further, because some high salt and high organic matter waste water quality or water yield fluctuation are great, utilize the equalizing basin can carry out quality of water and water yield stability to deposit some suspended solids. And sludge outlet pipes are arranged at the bottoms of the regulating tank and the integrated aerobic granular sludge membrane bioreactor, and sediments in the regulating tank and the integrated aerobic granular sludge membrane bioreactor are discharged through the sludge outlet pipes.
example 4:
the main structure of the present embodiment is the same as that of embodiment 3, and further, referring to fig. 2, the integrated aerobic granular sludge membrane bioreactor is shaped as a rectangular box with an open upper end, aerobic granular sludge is contained in the rectangular box, and a partition plate i 1 and a partition plate ii 2 which are parallel to each other are vertically arranged in the rectangular box. A plurality of through holes are formed in the partition plate I1.
the partition plate I1 divides the internal space of the rectangular box body into two parts, the bottom parts of the two parts of space are connected into the aeration pipe 4, one part of space is a membrane separation area F provided with a membrane module 3, and the other part of space is divided into a contact reaction area D and an aeration reaction area E by the partition plate II 2. And the aeration reaction area E is positioned between the partition plate I1 and the partition plate II 2.
A gap exists between the lower end of the partition plate II 2 and the bottom of the rectangular box body, and the upper end of the partition plate II 2 is lower than that of the partition plate I1.
The contact reaction area D is connected with a water inlet pipe 5. The membrane module 3 discharges water inside thereof through a drain pipe 6.
the inoculated sludge of the integrated aerobic granular sludge membrane bioreactor can be inoculated in the reactor only after 3-15 days of aeration, high water inlet load and high inorganic salt concentration pre-culture and a large amount of filamentous bacteria are generated.
Example 5:
The main structure of this embodiment is the same as that of embodiment 4, and further, the bottoms of the aeration reaction zone E and the membrane separation zone F are both provided with microporous aeration discs 8, and the microporous aeration discs 8 are connected to the aeration pipes 4. The aeration pipe 4 is supplied with air by an air compressor 9, and the volume ratio of the air to the water is 15: 1-30: 1.
Example 6:
The main structure of this embodiment is the same as that of embodiment 5, and further, the outlet end of the water discharge pipe 6 is connected with a pipe fitting i 10 and a pipe fitting ii 11 respectively. The pipe I10 is communicated with the water inlet pipe 5. The pipe II 11 is communicated with the membrane distillation unit.
One part of the outlet water of the membrane module 3 returns to the contact reaction zone D through a pipe fitting I10 to dilute COD in the inlet water, the other part of the outlet water enters the membrane distillation unit through a pipe fitting II 11, and the integrated aerobic granular sludge membrane bioreactor treats continuous and efficient organic matters. The treated water reflux ratio of the membrane component 3 can be adjusted according to the actual water quality, so that the concentration of organic matters can be diluted, and the cost of subsequent membrane treatment and evaporative crystallization is reduced.
Example 7:
The main structure of this example is the same as example 6, and further, the membrane module 3 is a plate-and-frame membrane module. The membrane material of the membrane component 3 is polyacrylonitrile, and the aperture range of the membrane is 0.1-0.4 μm.
Example 8:
The main structure of this example is the same as example 7, and further, the membrane material of the membrane distillation module of the membrane distillation unit is polypropylene, and the pore size range of the membrane is 0.15 μm to 0.2 μm.
Example 9:
The main structure of this embodiment is the same as that of embodiment 8, and further, the membrane distillation modules of the membrane distillation unit are connected in series in a plurality of groups, and the form of the membrane distillation module is a hollow fiber type.
The operating conditions of the membrane distillation unit include: the pH value of the wastewater on the feed liquid side is 7-9, the temperature of the wastewater on the feed liquid side is 60-80 ℃, the flow rate of the membrane surface on the feed liquid side is 0.6-1.2 m/s, and the vacuum degree on the permeate side is-0.095-0.075 MPa.
Example 10:
The main structure of this example is the same as example 9, and further, the heat source of the membrane distillation unit is electric heating.
example 11:
The main structure of this embodiment is the same as that of embodiment 10, and further, the evaporative crystallization unit employs an evaporative crystallizer, and a heat source of the evaporative crystallizer employs electric heating.
Claims (10)
1. The utility model provides a processing system of high organic matter waste water resourceization of high salt and zero release which characterized in that: comprises the regulating tank, an integrated aerobic granular sludge membrane bioreactor, a membrane distillation unit and an evaporative crystallization unit;
The regulating tank is connected with the integrated aerobic granular sludge membrane bioreactor; the integrated aerobic granular sludge membrane bioreactor is connected with the membrane distillation unit; the membrane distillation unit is connected with the evaporative crystallization unit;
When the device works, high-salt and high-organic wastewater enters the regulating tank, and part of suspended matters in the wastewater are precipitated in the regulating tank; the water produced by the regulating reservoir enters an integrated aerobic granular sludge membrane bioreactor, and the integrated aerobic granular sludge membrane bioreactor removes partial organic matters and residual suspended matters in the wastewater; the water produced by the integrated aerobic granular sludge membrane bioreactor enters a membrane distillation unit, and the membrane distillation unit removes ions and residual organic matters in the wastewater to obtain membrane distillation produced water and membrane distillation concentrated water; the membrane distillation produced water is recycled or discharged after reaching the standard; the membrane distillation concentrated water enters an evaporation crystallization unit, and the evaporation crystallization unit carries out evaporation crystallization treatment on the membrane distillation concentrated water to obtain crystals and water produced by evaporation crystallization; the crystallization is used for chemical plant recovery; and the water produced by the evaporative crystallization is recycled or discharged after reaching the standard.
2. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: and sludge outlet pipes are arranged at the bottoms of the regulating tank and the integrated aerobic granular sludge membrane bioreactor, and sediments in the regulating tank and the integrated aerobic granular sludge membrane bioreactor are discharged through the sludge outlet pipes.
3. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: the integrated aerobic granular sludge membrane bioreactor is a rectangular box body with an open upper end, aerobic granular sludge is filled in the rectangular box body, and a partition plate I (1) and a partition plate II (2) which are parallel to each other are vertically arranged in the rectangular box body; the partition plate I (1) is provided with a plurality of through holes;
The partition plate I (1) divides the internal space of the rectangular box body into two parts, the bottoms of the two parts of space are connected into the aeration pipe (4), one part of space is a membrane separation area F provided with a membrane assembly (3), and the other part of space is divided into a contact reaction area D and an aeration reaction area E by the partition plate II (2); the aeration reaction zone E is positioned between the partition plate I (1) and the partition plate II (2);
A gap is formed between the lower end of the partition plate II (2) and the bottom of the rectangular box body, and the upper end of the partition plate II is lower than the upper end of the partition plate I (1);
The contact reaction area D is connected with a water inlet pipe (5); the membrane module (3) discharges water in the membrane module through a drain pipe (6).
4. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 3, characterized in that: the bottoms of the aeration reaction zone E and the membrane separation zone F are both provided with a microporous aeration disc (8), and the microporous aeration disc (8) is connected to an aeration pipe (4); the aeration pipe (4) is supplied with air by an air compressor (9), and the volume ratio of the air to the water is 15: 1-30: 1.
5. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 3, characterized in that: the outlet end of the drain pipe (6) is respectively connected with a pipe fitting I (10) and a pipe fitting II (11); the pipe fitting I (10) is communicated with the water inlet pipe (5); the pipe II (11) is communicated with the membrane distillation unit;
One part of the effluent of the membrane module (3) returns to the contact reaction zone D through the pipe I (10) to dilute COD in the inlet water, the other part of the effluent enters the membrane distillation unit through the pipe II (11), and the integrated aerobic granular sludge membrane bioreactor treats continuous and efficient organic matters.
6. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 3, characterized in that: the membrane component (3) adopts an external pressure type membrane component, an immersed type membrane component, a hollow fiber curtain type membrane component or a plate frame type membrane component; the membrane material of the membrane component (3) is polysulfone, polyacrylonitrile, polyvinylidene fluoride or polytetrafluoroethylene, and the pore diameter range of the membrane is 0.1-0.4 mu m.
7. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: the membrane material of the membrane distillation component of the membrane distillation unit is polyvinylidene fluoride, polytetrafluoroethylene or polypropylene, and the membrane aperture range is 0.15-0.2 μm.
8. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: the membrane distillation components of the membrane distillation unit are a group, a plurality of groups connected in series or a plurality of groups connected in parallel, and the form of the membrane distillation components is a hollow fiber type or a plate type;
the operating conditions of the membrane distillation unit include: the pH value of the wastewater on the feed liquid side is 7-9, the temperature of the wastewater on the feed liquid side is 60-80 ℃, the flow rate of the membrane surface on the feed liquid side is 0.6-1.2 m/s, and the vacuum degree on the permeate side is-0.095-0.075 MPa.
9. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: the heat source of the membrane distillation unit is industrial waste heat or electric heating.
10. The high-salinity high-organic wastewater recycling and zero-emission treatment system according to claim 1, characterized in that: the evaporative crystallization unit adopts an evaporative crystallizer, and a heat source of the evaporative crystallizer adopts waste steam heating or electric heating.
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