CN220684886U - Wastewater treatment system - Google Patents
Wastewater treatment system Download PDFInfo
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- CN220684886U CN220684886U CN202321759884.XU CN202321759884U CN220684886U CN 220684886 U CN220684886 U CN 220684886U CN 202321759884 U CN202321759884 U CN 202321759884U CN 220684886 U CN220684886 U CN 220684886U
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 120
- 238000006243 chemical reaction Methods 0.000 claims abstract description 52
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 45
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000010612 desalination reaction Methods 0.000 claims abstract description 11
- 239000003814 drug Substances 0.000 claims description 63
- 238000003860 storage Methods 0.000 claims description 63
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 229910001868 water Inorganic materials 0.000 claims description 40
- 238000005345 coagulation Methods 0.000 claims description 23
- 230000015271 coagulation Effects 0.000 claims description 22
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 21
- 238000005189 flocculation Methods 0.000 claims description 21
- 230000016615 flocculation Effects 0.000 claims description 21
- 238000004062 sedimentation Methods 0.000 claims description 18
- 238000001223 reverse osmosis Methods 0.000 claims description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 15
- 229920002401 polyacrylamide Polymers 0.000 claims description 15
- 238000000108 ultra-filtration Methods 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 13
- 239000011790 ferrous sulphate Substances 0.000 claims description 11
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 11
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 11
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 239000010865 sewage Substances 0.000 description 10
- 239000010802 sludge Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- -1 hydroxyl ions Chemical class 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
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- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 description 1
- 244000291564 Allium cepa Species 0.000 description 1
- 235000010167 Allium cepa var aggregatum Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
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- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000000903 blocking effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
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- 238000001556 precipitation Methods 0.000 description 1
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- 238000011946 reduction process Methods 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
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Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model relates to the technical field of wastewater treatment, and discloses a wastewater treatment system. The wastewater treatment system comprises a controller, and a wastewater pretreatment module, a micro-electrolysis module, a Fenton treatment module, a biochemical treatment module and a desalination module which are connected with the controller in a signal manner and are sequentially communicated with each other; the heavy metal wastewater pretreatment unit comprises a heavy metal-containing wastewater collection tank and a first reaction tank which are sequentially communicated, and the conventional wastewater pretreatment unit comprises a conventional wastewater collection tank and a second reaction tank which are sequentially communicated; the controller is in signal connection with the heavy metal detection sensor, so that after the heavy metal detection sensor detects that the wastewater to be treated is conventional wastewater or wastewater containing heavy metal, the controller controls the wastewater to be treated to enter the conventional wastewater pretreatment unit or the heavy metal wastewater pretreatment unit. The waste water purifying effect is better, the waste water can be recycled, and the energy conservation and the environmental protection are better.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment system.
Background
At present, the wastewater can be divided into conventional wastewater and wastewater containing heavy metals according to different pollutant substances, and the treatment process of the wastewater containing heavy metals is often different from that of the conventional wastewater, but in the existing wastewater purification treatment system, the same wastewater treatment system is generally adopted for the different types of wastewater, so that the pollutant substances in the wastewater containing heavy metals are difficult to purify and treat completely.
Disclosure of Invention
The utility model mainly aims to provide a wastewater treatment system, and aims to solve the technical problem that the existing wastewater treatment system has poor purification effect on heavy metal-containing wastewater due to the fact that the same treatment system treatment flow is adopted for both heavy metal-containing wastewater and conventional wastewater.
In order to achieve the above purpose, the utility model provides a wastewater treatment system, which comprises a controller, and a wastewater pretreatment module, a micro-electrolysis module, a Fenton treatment module, a biochemical treatment module and a desalination module which are connected with the controller in a signal manner and are sequentially communicated with each other;
the heavy metal wastewater pretreatment unit comprises a heavy metal-containing wastewater collection tank and a first reaction tank which are sequentially communicated, and the conventional wastewater pretreatment unit comprises a conventional wastewater collection tank and a second reaction tank which are sequentially communicated;
the controller is in signal connection with the heavy metal detection sensor, so that after the heavy metal detection sensor detects that the wastewater to be treated is conventional wastewater or wastewater containing heavy metal, the controller controls the wastewater to be treated to enter the conventional wastewater pretreatment unit or the heavy metal wastewater pretreatment unit.
The wastewater is divided into wastewater containing heavy metals or conventional wastewater to be respectively pretreated, and then sequentially passes through a micro-electrolysis module, a Fenton treatment module, a biochemical treatment module and a desalination module, the quality index of the wastewater after the treatment reaches the standard, the purification effect is good, the treated wastewater can be recycled, and the energy conservation and the environment friendliness are better.
Preferably, the first reaction tank is respectively communicated with a polyacrylamide medicine storage tank, a polyaluminium chloride medicine storage tank, a sodium hydroxide medicine storage tank, a ferrous sulfate medicine storage tank and a hydrogen peroxide medicine storage tank.
Preferably, the second reaction tank is respectively communicated with the polyacrylamide medicine storage tank, the polyaluminum chloride medicine storage tank and the sodium hydroxide medicine storage tank.
Preferably, the micro-electrolysis module comprises a filter box and a micro-electrolysis cell which are communicated in sequence. The filter box in the micro-electrolysis module can initially precipitate the floccules separated from the wastewater, electrochemical reaction is carried out in the micro-electrolysis cell, so that iron is corroded to be changed into ferrous ions, and the ferrous ions and hydroxyl ions react to form ferrous hydroxide with coagulation, thereby providing a reaction foundation for the subsequent Fenton treatment module.
Preferably, the micro-electrolysis cell is communicated with a sulfuric acid medicine storage tank and a sodium hydroxide medicine storage tank.
Preferably, the Fenton treatment module comprises a Fenton dosing tank, a Fenton reaction tank, a coagulation flocculation tank and a primary sedimentation tank which are sequentially communicated.
The Fenton treatment module prepares a Fenton strong oxidizing reagent by using ferrous sulfate and hydrogen peroxide, so that organic matters in the wastewater are thoroughly oxidized, and CODCr in the wastewater is reduced; then adding a coagulation reagent, namely polyaluminium chloride and a flocculation reagent, namely polyacrylamide into a coagulation flocculation tank, so that oxidized wastewater is subjected to mud-water separation, and a foundation is provided for entering a biochemical treatment module; and separating the flocs from water in the wastewater in the primary sedimentation tank, lifting the flocs settled to the bottom of the tank to a sludge tank by using sludge, and allowing the water separated from the flocs to enter a subsequent treatment module.
Preferably, the coagulation flocculation tank is respectively communicated with a polyacrylamide medicine storage tank, a polyaluminium chloride medicine storage tank and a sodium hydroxide medicine storage tank.
Preferably, the Fenton dosing tank is respectively communicated with a ferrous sulfate medicine storage tank, a sulfuric acid medicine storage tank and a hydrogen peroxide medicine storage tank.
Preferably, the biochemical treatment module comprises an anaerobic tank, an aerobic tank, a secondary sedimentation tank and a clean water tank which are sequentially communicated.
In an anaerobic tank of the biochemical treatment module, organic matters are finally converted into small molecular matters such as methane, carbon dioxide, water, hydrogen sulfide, ammonia and the like by utilizing anaerobic microorganisms, and then the small molecular matters are introduced into an aerobic tank to participate in biochemical degradation and adsorption under an aerobic condition, so that various organic matters in sewage are removed, and the content of the organic matters in the sewage is greatly reduced. And then carrying out solid-liquid separation in a secondary sedimentation tank to remove the biological film and suspended sludge peeled off in the previous working procedures, so that the sewage is really purified, and then storing the purified sewage in a clean water tank.
Preferably, the desalination module comprises an ultrafiltration unit, an ultrafiltration water production tank and a reverse osmosis unit which are communicated in sequence, wherein the reverse osmosis unit is communicated with the clean water tank so thatObtaining: and the reverse osmosis membrane concentrated water which does not pass through the detection can flow back to the clean water tank for further treatment. Before the purified waste water is recycled, the waste water is firstly passed through an ultrafiltration unit and then is conveyed into an ultrafiltration water production tank for storage, and then most monovalent ions such as Na are trapped by RO membranes in a reverse osmosis unit + And Cl － And the like, so as to reduce the salt content in the wastewater, ensure that the water body is purified more completely, and achieve the aim of recycling.
Preferably, the first reaction tank, the second reaction tank, the micro-electrolysis tank, the Fenton dosing tank, the coagulation flocculation tank and the aerobic tank are all communicated with a blower device for blowing air, and a stirrer for stirring is arranged in the first reaction tank, the second reaction tank, the micro-electrolysis tank, the Fenton dosing tank and the coagulation flocculation tank.
The wastewater treatment system has the following beneficial effects: the wastewater to be purified is divided into wastewater containing heavy metals or conventional wastewater to be respectively pretreated, and then is sequentially treated by the micro-electrolysis module, the Fenton treatment module, the biochemical treatment module and the desalination module, the quality index of the wastewater after the treatment reaches the standard, the water purifying effect is good, the treated wastewater can be directly recycled, and the energy is saved and the environment is protected.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a wastewater treatment system according to the present utility model;
FIG. 2 is a schematic view of a portion of the structure of the wastewater treatment system of the present utility model;
FIG. 3 is a flow diagram of a controller and other modules in the wastewater treatment system of the present utility model.
In the accompanying drawings: 01-polyacrylamide medicine storage tank, 02-polyaluminum chloride medicine storage tank, 03-sodium hydroxide medicine storage tank, 04-ferrous sulfate medicine storage tank, 05-hydrogen peroxide medicine storage tank, 06-sulfuric acid medicine storage tank, 1-controller, 11-heavy metal detection sensor, 2-wastewater pretreatment module, 21-conventional wastewater pretreatment unit, 211-conventional wastewater collection tank, 212-second reaction tank, 22-heavy metal wastewater pretreatment unit, 221-first reaction tank, 222-heavy metal-containing wastewater collection tank, 3-micro-electrolysis module, 31-filtration tank, 32-micro-electrolysis tank, 4-Fenton treatment module, 41-Fenton dosing tank, 42-Fenton reaction tank, 43-coagulation flocculation tank, 44-primary sedimentation tank, 5-biochemical treatment module, 51-anaerobic tank, 52-aerobic tank, 53-secondary sedimentation tank, 54-water tank, 6-desalination module, 61-ultrafiltration unit, 62-ultrafiltration water production tank, 63-reverse osmosis unit, 7-dosing pump, 8-clean air blast equipment.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiment of the present utility model, directional indications such as up, down, left, right, front, and rear … … are referred to, and the directional indication is merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
As shown in fig. 1 to 3, a wastewater treatment system comprises a controller 1, and a wastewater pretreatment module 2, a micro-electrolysis module 3, a Fenton treatment module 4, a biochemical treatment module 5 and a desalination module 6 which are connected with the controller 1 in a signal manner and are sequentially communicated with each other;
the wastewater pretreatment module 2 comprises a conventional wastewater pretreatment unit 21 and a heavy metal wastewater pretreatment unit 22, wherein the heavy metal wastewater pretreatment unit 22 comprises a heavy metal-containing wastewater collection tank 222 and a first reaction tank 221 which are sequentially communicated, and the conventional wastewater pretreatment unit 21 comprises a conventional wastewater collection tank 211 and a second reaction tank 212 which are sequentially communicated;
the controller 1 is in signal connection with the heavy metal detection sensor 11, so that after the heavy metal detection sensor 11 detects that the wastewater to be treated is conventional wastewater or wastewater containing heavy metal, the controller 1 controls the wastewater to be treated to enter the conventional wastewater pretreatment unit 21 or the heavy metal wastewater pretreatment unit 22.
For the discharged wastewater to be treated and discharged after reaching standards, the scheme is to firstly detect whether the main components of the wastewater contain heavy metals (the detectable heavy metals comprise chromium, lead, copper and the like) by using a heavy metal sensor, then select a reasonable pretreatment unit, and the system adopts a technology of firstly materializing and then biochemically improving the biodegradability of the wastewater and then entering a biochemical system and an advanced treatment system. Firstly, the waste water is collected in a conventional waste water collecting tank 211 or a heavy metal-containing waste water collecting tank 222 in a classified manner, after a certain amount of water is collected, the waste water is selected by a controller 1-central control microcomputer according to the type of the waste water (whether heavy metal is contained or not), if the heavy metal is contained, the heavy metal waste water pretreatment unit 22 is adopted to automatically operate, otherwise, the conventional waste water pretreatment unit 21 is adopted to operate, and then the waste water is sequentially subjected to the micro-electrolysis module 3, the Fenton treatment module 4, the biochemical treatment module 5 and the desalination module 6, and the waste water after the treatment is detected COD, BOD, SS, the water quality indexes such as chromaticity and the like reach the standard and then discharged, and the precipitated sludge is subjected to outward transportation treatment by a qualification unit.
In the scheme, the conventional wastewater adopts a process of 'second reaction tank 212 (neutralization, coagulation, micro-electrolysis treatment, fenton treatment, biochemical treatment and reverse osmosis treatment'; the wastewater containing heavy metals is subjected to micro-electrolysis, fenton treatment, biochemical treatment and reverse osmosis treatment by adopting a first reaction tank 221 (neutralization, oxidation reduction/channel breaking, coagulation).
Further, the first reaction tank 221 is respectively communicated with the polyacrylamide medicine storage tank 01, the polyaluminium chloride medicine storage tank 02, the sodium hydroxide medicine storage tank 03, the ferrous sulfate medicine storage tank 04 and the hydrogen peroxide medicine storage tank 05 through a medicine adding pump 7.
The first reaction tank 221 is respectively communicated with the polyacrylamide medicine storage tank 01, the polyaluminium chloride medicine storage tank 02, the sodium hydroxide medicine storage tank 03, the ferrous sulfate medicine storage tank 04 and the hydrogen peroxide medicine storage tank 05, the pH value of the wastewater is neutralized by adding sodium hydroxide and the like in the first reaction tank 221, the pH value of the wastewater is controlled by a pH on-line controller to transport various medicines from each medicine storage tank by a medicine adding pump 7, the pH value of the wastewater is ensured to be stable in a preset range, hydrogen peroxide and ferrous sulfate (ferrous salt) are also added in the wastewater, and oxidation reduction and chromium breaking treatment are carried out, wherein the reduction process comprises the following steps: with FeSO in a predetermined pH range 4 Cr in wastewater 6+ Reduction to Cr 3+ While air stirring is provided in the first reaction tank 221; the vein breaking process comprises the following steps: with Fe in a predetermined pH range 2+ With H 2 O 2 The Fenton strong oxidizing reagent is prepared to thoroughly oxidize organic matters in the wastewater, reduce CODCr in the wastewater, and oxidize and treat a small amount of aromatic hydrocarbon, trioctyl phosphate, 2-ethyl shallot and other pollutants in the wastewater; then preparing for coagulating sedimentation reaction by adding flocculant-polyacrylamide, coagulant-polyaluminium chloride, and simultaneously stirring air to regulateThe wastewater with the pH value being saved is subjected to adsorption, aggregation and flocculation reaction under the action of a coagulant and a flocculant, so as to capture tiny particles and colloids in the wastewater, enlarge and separate out the tiny particles and colloids, and degrade SS, CODCr, heavy metal ions and the like in the wastewater through precipitation separation.
Further, the second reaction tank 212 is respectively communicated with the polyacrylamide medicine storage tank 01, the polyaluminum chloride medicine storage tank 02 and the sodium hydroxide medicine storage tank 03. Similarly, the conventional wastewater is subjected to coagulating sedimentation by adding flocculant-polyacrylamide and coagulant-polyaluminium chloride, and simultaneously sodium hydroxide is also added to adjust the pH so as to remove part of pollutants in the conventional wastewater.
Further, the micro-electrolysis module 3 comprises a filter box 31 and a micro-electrolysis cell 32 which are communicated in sequence. Specifically, a filter box 31-inclined tube sedimentation tank is arranged in the micro-electrolysis module 3, the flocs in the wastewater are separated from water through gravity sedimentation, the flocs settled to the bottom of the tank form sludge which is lifted to a sludge tank (not shown in the figure), and the water separated from the flocs enters a subsequent treatment module.
Further, the micro-electrolytic cell is communicated with the sulfuric acid medicine storage tank 06 and the sodium hydroxide medicine storage tank 03. The micro-electrolytic cell 32 is communicated with the sodium hydroxide medicine storage tank 03 through the medicine adding pump 7, sodium hydroxide is pumped into the micro-electrolytic cell 32, wherein the micro-electrolytic cell 32 utilizes potential difference existing between iron-carbon particles to form countless micro-primary cells, the micro-cells take iron with low potential as a cathode and carbon with high potential as an anode, electrochemical reaction occurs in aqueous solution containing acidic electrolyte, as a result of the reaction, iron is corroded to be changed into ferrous iron ions which enter the solution, and the pH value of effluent is regulated to about 9, and ferrous hydroxide with a coagulation effect is formed due to the action of the iron ions and hydroxyl ions, so that a reaction basis is provided for Fenton process in the following Fenton processing module 4.
Further, the Fenton treatment module 4 comprises a Fenton dosing tank 41, a Fenton reaction tank 42, a coagulation flocculation tank 43 and a primary sedimentation tank 44 which are sequentially communicated.
Further, the coagulation flocculation tank 43 is respectively communicated with the polyacrylamide medicine storage tank 01, the polyaluminum chloride medicine storage tank 02 and the sodium hydroxide medicine storage tank 03.
Further, the Fenton dosing tank 41 is respectively communicated with the ferrous sulfate medicine storage tank 04, the sulfuric acid medicine storage tank 06 and the hydrogen peroxide medicine storage tank 05.
The Fenton dosing tank 41 is pumped with ferrous sulfate and hydrogen peroxide, and Fe is used in a certain pH range 2+ And H 2 O 2 Preparing Fenton strong oxidizing reagent, thoroughly oxidizing organic matters in the wastewater, and reducing CODCr in the wastewater; the Fenton reaction tank 42 is subjected to air stirring, and the Fenton treatment module 4 adopts a Fenton oxidation method, so that compared with other oxidation processes, the Fenton oxidation method has the advantages of simpler operation, rapid reaction, flocculation generation and the like. The pH value is regulated back by sodium hydroxide in a coagulation flocculation tank 43, a coagulation reagent-polyaluminium chloride and a flocculation reagent-polyacrylamide are added, so that the oxidized wastewater is subjected to mud-water separation, and a foundation is provided for entering a biochemical treatment module 5; the subsequent primary sedimentation tank 44 is also a tube sedimentation tank, and the flocs in the wastewater are separated from the water through gravity sedimentation, and the flocs settled to the bottom of the tank form sludge which is lifted to a sludge tank, and the water separated from the flocs enters a subsequent treatment module.
Further, the biochemical treatment module 5 comprises an anaerobic tank 51, an aerobic tank 52, a secondary sedimentation tank 53 and a clean water tank 54 which are sequentially communicated. In the biochemical treatment module 5, anaerobic biological treatment is performed in the anaerobic tank 51, and the organic matters are finally converted into small molecular substances such as methane, carbon dioxide, water, hydrogen sulfide, ammonia and the like by taking the reduced organic matters as hydrogen acceptors under the condition that external energy is not required to be provided by utilizing the metabolic characteristics of anaerobic microorganisms, and in the process, the metabolic processes of different microorganisms are mutually influenced and mutually restricted to form a complex ecological system. Then the sewage is introduced into an aerobic tank 52, the aerobic tank 52 is a core part for organic matter treatment in the sewage treatment system, and various organic matters in the sewage are removed by the common participation of biochemical degradation and adsorption under the aerobic condition through a large number of microbial communities of different species attached to the filler, so that the organic matter content in the sewage is greatly reduced. The aerobic tank 52 is mainly characterized by a biomembrane method and has the characteristics of an activated sludge method, and particularly comprises a tank body, a filler, a water distribution device, an oxygenation aeration system and the like, wherein the filler adopts suspended filler, and has the advantages of large specific surface area, long service life, easiness in film formation, corrosion resistance and non-caking and blocking. Then, solid-liquid separation is performed in the secondary sedimentation tank 53, the biofilm and suspended sludge peeled off in the above-described process are removed, the sewage is truly purified, and the purified sewage is stored in the clean water tank 54.
Further, the desalination module 6 includes an ultrafiltration unit 61, an ultrafiltration water producing tank 62, and a reverse osmosis unit 63 which are sequentially communicated, the reverse osmosis unit 63 being communicated with the clean water tank 54 such that: the reverse osmosis membrane concentrate which does not pass the detection can be returned to the clean water tank 54 for further treatment. The purified waste water is required to be recycled, firstly passes through an ultrafiltration unit 61, sequentially carries out sand filtration, carbon filtration and ultrafiltration in the ultrafiltration unit 61, then is conveyed into an ultrafiltration water production tank 62 for storage, and then utilizes an RO membrane in a reverse osmosis unit 63, and the pore diameter of the membrane is 10-10m, so that most monovalent ions such as Na can be trapped because the membrane is more compact + And Cl - Etc. to reduce the salt content of the wastewater.
When the reverse osmosis membrane concentrated water does not reach the standard after detection, the reverse osmosis membrane concentrated water flows back to the clean water tank 54 for ultrafiltration and reverse osmosis treatment until the discharged clean water reaches the detection standard.
Further, the first reaction tank 221, the second reaction tank 212, the micro-electrolysis tank 32, the Fenton dosing tank 41, the coagulation flocculation tank 43 and the aerobic tank 52 are all communicated with the blower device 8 for blowing air, and the first reaction tank 221, the second reaction tank 212, the micro-electrolysis tank 32, the Fenton dosing tank 41 and the coagulation flocculation tank 43 are all provided with a stirrer (not shown in the figure) for stirring. Air stirring is carried out in each reaction tank or unit, so that the reaction effect is better, and the purification treatment efficiency of wastewater is improved.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The wastewater treatment system is characterized by comprising a controller (1), and a wastewater pretreatment module (2), a micro-electrolysis module (3), a Fenton treatment module (4), a biochemical treatment module (5) and a desalination module (6) which are connected with the controller (1) in a signal manner and are sequentially communicated with each other;
the wastewater pretreatment module (2) comprises a conventional wastewater pretreatment unit (21) and a heavy metal wastewater pretreatment unit (22), the heavy metal wastewater pretreatment unit (22) comprises a heavy metal-containing wastewater collection tank (222) and a first reaction tank (221) which are sequentially communicated, and the conventional wastewater pretreatment unit (21) comprises a conventional wastewater collection tank (211) and a second reaction tank (212) which are sequentially communicated;
the controller (1) is in signal connection with the heavy metal detection sensor (11), so that after the heavy metal detection sensor (11) detects that the wastewater to be treated is conventional wastewater or wastewater containing heavy metal, the controller (1) controls the wastewater to be treated to enter the conventional wastewater pretreatment unit (21) or the heavy metal wastewater pretreatment unit (22).
2. The wastewater treatment system according to claim 1, wherein the first reaction tank (221) is communicated with a polyacrylamide medicine storage tank (01) through a dosing pump (7), the first reaction tank (221) is communicated with a polyaluminum chloride medicine storage tank (02) through the dosing pump (7), the first reaction tank (221) is communicated with a sodium hydroxide medicine storage tank (03) through the dosing pump (7), the first reaction tank (221) is communicated with a ferrous sulfate medicine storage tank (04) through the dosing pump (7), and the first reaction tank (221) is communicated with a hydrogen peroxide medicine storage tank (05) through the dosing pump (7).
3. The wastewater treatment system according to claim 2, characterized in that the second reaction tank (212) is communicated with the polyacrylamide medicine storage tank (01) through a dosing pump (7), the second reaction tank (212) is communicated with the polyaluminum chloride medicine storage tank (02) through a dosing pump (7), and the second reaction tank (212) is communicated with the sodium hydroxide medicine storage tank (03) through a dosing pump (7).
4. The wastewater treatment system according to claim 2, characterized in that the micro-electrolysis module (3) comprises a filter tank (31) and a micro-electrolysis cell (32) which are in turn connected.
5. The wastewater treatment system according to claim 4, characterized in that the micro-electrolysis cell (32) is communicated with a sulfuric acid storage tank (06) through a dosing pump (7), and the micro-electrolysis cell (32) is communicated with the sodium hydroxide storage tank (03) through the dosing pump (7).
6. The wastewater treatment system according to claim 5, wherein the Fenton treatment module (4) comprises a Fenton dosing tank (41), a Fenton reaction tank (42), a coagulation flocculation tank (43) and a primary sedimentation tank (44) which are communicated in sequence.
7. The wastewater treatment system according to claim 6, characterized in that the coagulation flocculation tank (43) is communicated with the polyacrylamide medicine storage tank (01) through a dosing pump (7), the coagulation flocculation tank (43) is communicated with the polyaluminum chloride medicine storage tank (02) through a dosing pump (7), and the coagulation flocculation tank (43) is communicated with the sodium hydroxide medicine storage tank (03) through a dosing pump (7);
fenton dosing tank (41) through dosing pump (7) with ferrous sulfate medicine storage tank (04) intercommunication, fenton dosing tank (41) through dosing pump (7) with sulfuric acid medicine storage tank (06) intercommunication, fenton dosing tank (41) through dosing pump (7) with hydrogen peroxide medicine storage tank (05) intercommunication.
8. The wastewater treatment system according to claim 6, wherein the biochemical treatment module (5) comprises an anaerobic tank (51), an aerobic tank (52), a secondary sedimentation tank (53) and a clean water tank (54) which are sequentially communicated.
9. The wastewater treatment system according to claim 8, characterized in that the desalination module (6) comprises an ultrafiltration unit (61), an ultrafiltration water production tank (62) and a reverse osmosis unit (63) in sequential communication, the reverse osmosis unit (63) being in communication with the clean water tank (54) such that: the reverse osmosis membrane concentrated water which does not pass through the detection can flow back to the clean water tank (54) for further treatment.
10. The wastewater treatment system according to claim 8, characterized in that the first reaction tank (221), the second reaction tank (212), the micro-electrolysis tank (32), the Fenton dosing tank (41), the coagulation flocculation tank (43) and the aerobic tank (52) are respectively communicated with a blower device (8) for blowing air, and a stirrer for stirring is arranged in each of the first reaction tank (221), the second reaction tank (212), the micro-electrolysis tank (32), the Fenton dosing tank (41) and the coagulation flocculation tank (43).
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