CN216273632U - Ecological treatment device for high-salt pickle wastewater - Google Patents
Ecological treatment device for high-salt pickle wastewater Download PDFInfo
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Abstract
The application discloses ecological treatment device of high salt pickles waste water, ecological treatment device of high salt pickles waste water includes neutralization equalizing basin, ultrafiltration system, nanofiltration system, edible salt recovery system and sewage treatment station, and ultrafiltration system is linked together with neutralization equalizing basin and nanofiltration system respectively, and edible salt recovery system and sewage treatment station communicate with nanofiltration system respectively, and the sewage treatment station still communicates with ultrafiltration system. This application realizes the high-purity resource recycle to salinity in the salt waste water, and simultaneously, sewage after the desalination can be stable discharge to reach standard for a long time.
Description
Technical Field
The application relates to the field of environment-friendly water treatment, in particular to an ecological treatment device for high-salt pickle wastewater.
Background
The industry of the pickles is developed vigorously, the problem of environmental pollution is highlighted, and especially, enough attention needs to be paid to a large amount of high-salt wastewater generated in the production process of the pickles.
Most of pickle production enterprises adopt a biochemical treatment process combining anaerobic treatment and aerobic treatment, such as a first step of adopting an Internal Circulation (IC) anaerobic reactor, a sequencing batch bioreactor (SBR) and a plant oxidation pond; ABR + contact oxidation + oxidation pond; ③ ASBBR + two-stage SBBR + plant stabilization pond and the like. Although the processes can reduce the concentration of organic matters, nitrogen and phosphorus in the pickle wastewater and meet the corresponding discharge standard, the removal or recycling of high-concentration salt in the sewage is not considered, so that the stability and efficiency of biochemical treatment are greatly reduced, and the waste of salt and the water quality pollution are directly caused.
Generally speaking, the biochemical method is the most widely applied and low-cost sewage treatment technology, and organic matters, nitrogen, phosphorus and other nutrient elements contained in the pickle wastewater can be degraded and removed by microorganisms, so that on one hand, the activity of the microorganisms is greatly limited by the overhigh salt content (NaCl) of the pickle wastewater, and even toxic effect can be generated, so that the biochemical treatment is ineffective; on the other hand, the salt water treated by biochemical method cannot be reused as edible salt even if the salt is evaporated and recovered.
In view of the current situation that the research and engineering application of domestic and foreign pickle industry on the salt recovery and resource utilization of high-salt wastewater are few, the exploration of a high-salt wastewater treatment technology in the pickle industry, which has the advantages of feasible technology, economy, reasonability, standard effect and recoverable and recyclable salt, is still an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
Based on above-mentioned problem, the application provides an ecological treatment device of high salt pickles waste water, and the device not only can solve high salt waste water treatment efficiency unstability, the unable recovery of salinity, the too high scheduling problem of maintenance cost, lets the pickles enterprise under the condition of increment increase production, does not newly increase the pollutant and discharges, realizes the resource utilization of salt even, reduction in production cost, and the salinity of retrieving can regard as edible salt to reuse.
The technical scheme is as follows: the utility model provides an ecological treatment device of high salt pickles waste water, ecological treatment device of high salt pickles waste water includes neutralization equalizing basin, ultrafiltration system, nanofiltration system, edible salt recovery system and sewage treatment station, and ultrafiltration system is linked together with neutralization equalizing basin and nanofiltration system respectively, and edible salt recovery system and sewage treatment station communicate with nanofiltration system respectively, and the sewage treatment station still communicates with ultrafiltration system.
Optionally, the ecological treatment device for high-salt pickle wastewater further comprises a first intermediate water tank and a second intermediate water tank, the first intermediate water tank is respectively communicated with the neutralization regulating tank and the ultrafiltration system, and the second intermediate water tank is respectively communicated with the ultrafiltration system and the nanofiltration system.
Optionally, the ecological treatment device for the high-salt pickle wastewater further comprises a microfiltration system, and the microfiltration system is respectively communicated with the ultrafiltration system and the neutralization regulating tank.
Optionally, the ecological treatment device for high-salt pickle wastewater further comprises a first intermediate water tank and a second intermediate water tank, the first intermediate water tank is respectively communicated with the microfiltration system and the ultrafiltration system, and the second intermediate water tank is respectively communicated with the ultrafiltration system and the nanofiltration system.
Optionally, the ultrafiltration membrane and the filtration membrane washing system are included.
Optionally, the nanofiltration system comprises a nanofiltration membrane and a nanofiltration membrane washing system.
Optionally, the edible salt recovery system comprises a concentration and crystallization device, a purification and purification device and a salt recovery device, and the concentration and crystallization device is communicated with the nanofiltration system.
Optionally, the sewage treatment station comprises a sewage adjusting tank, an air flotation tank, a hydrolysis acidification tank, an A2/O tank and a sedimentation tank, wherein the sewage adjusting tank is respectively communicated with the ultrafiltration system and the nanofiltration system, the air flotation tank is respectively communicated with the sewage adjusting tank and the hydrolysis acidification tank, the A2/O tank is respectively communicated with the hydrolysis acidification tank and the sedimentation tank, and the A2/O tank comprises an anoxic tank and an aerobic tank.
The invention principle and the beneficial effects are as follows:
aiming at the treatment of high-salinity wastewater in the pickle industry, the method firstly adopts a chemical method to adjust the PH value through neutralization and adjustment before salt recovery, and the rest is only treated by a physical method, so that the salt can be separated, concentrated and purified from the wastewater through a physicochemical means, the aim of comprehensively recycling resources is finally fulfilled, the production cost is saved, and clean production is realized, thereby the recovered salt can be reused as edible salt.
This application still handles through carrying out biochemical method again after the salinity is handled and is retrieved to avoid too high salinity or concentration to follow-up biochemical system in the microorganism produce the inhibitive nature, guarantee biochemical treatment's stability and efficiency.
The application also avoids the blockage of the follow-up ultrafiltration membrane and the nanofiltration membrane by adding microfiltration treatment before ultrafiltration and nanofiltration treatment and replacing anaerobic treatment, aerobic treatment and flocculant treatment by microfiltration treatment.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present application;
FIG. 2 is a schematic view of the overall structure of embodiment 2 of the present application;
fig. 3 is a schematic diagram of the operation of the ultrafiltration membrane of the present application.
Detailed Description
The present application will be further described with reference to the accompanying drawings.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or that are conventionally placed during use of the product of the application, and are used only for convenience in describing the application and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the application.
In the description of the present application, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "in communication" are to be construed broadly, e.g., as meaning in fixed communication, in removable communication, or in integral communication; either directly or indirectly through an intermediary, or both elements may be interconnected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example 1
Referring to fig. 1, the ecological treatment device for high-salt pickle wastewater comprises a neutralization regulating tank 4, an ultrafiltration system 5, a nanofiltration system 6, an edible salt recovery system and a sewage treatment station, wherein the ultrafiltration system 5 is respectively communicated with the neutralization regulating tank 4 and the nanofiltration system 6, the edible salt recovery system and the sewage treatment station are respectively communicated with the nanofiltration system 6, and the sewage treatment station is also communicated with the ultrafiltration system 5.
In a specific embodiment of this embodiment, the ecological treatment device for high-salt kimchi wastewater further comprises a first intermediate water tank 1 and a second intermediate water tank 2, the first intermediate water tank 1 is respectively communicated with the neutralization and regulation tank 4 and the ultrafiltration system 5, and the second intermediate water tank 2 is respectively communicated with the ultrafiltration system 5 and the nanofiltration system 6.
In a specific embodiment of this embodiment, the ultrafiltration system 5 comprises an ultrafiltration membrane.
In a specific embodiment of this embodiment, the ultrafiltration system 5 further comprises an ultrafiltration membrane cleaning system 16.
In a particular embodiment of this embodiment, the nanofiltration system 6 comprises a nanofiltration membrane.
In a specific embodiment of this embodiment, nanofiltration system 6 further comprises a nanofiltration membrane washing system 17.
In a specific embodiment of the embodiment, the edible salt recovery system comprises a concentration and crystallization device 7, a purification and purification device 8 and a salt recovery device 9, wherein the concentration and crystallization device 7 is communicated with the nanofiltration system 6.
In a particular embodiment of this embodiment, the salt recovery unit 9 is a salt storage tank.
In a specific implementation manner of this embodiment, the sewage treatment station includes a sewage adjusting tank 10, an air flotation tank 12, a hydrolysis acidification tank 13, an a2/O tank 14 and a sedimentation tank 15, the sewage adjusting tank 10 is respectively communicated with the ultrafiltration system 5 and the nanofiltration system 6, the air flotation tank 12 is respectively communicated with the sewage adjusting tank 10 and the hydrolysis acidification tank 13, the a2/O tank 14 is respectively communicated with the hydrolysis acidification tank 13 and the sedimentation tank 15, and the a2/O tank 14 includes an anoxic tank and an aerobic tank.
In a particular embodiment of this embodiment, the sewage treatment station further comprises a grid 11.
When the ecological treatment device in figure 1 treats the high-salt pickle wastewater, the treatment process is as follows:
referring to fig. 1, an ecological treatment method of high-salt kimchi wastewater includes the following steps:
preprocessing:
collecting the saline wastewater (a sample A is analyzed, and the analysis result is shown in table 1) generated in the production workshop, and intercepting fine suspended matters such as vegetable leaves and the like in the wastewater through a fine grid or an ultrafine grid;
the intercepted saline wastewater enters a neutralization regulation sedimentation tank for neutralization regulation; in the neutralization regulation sedimentation tank, on one hand, the pH of the sewage is regulated by adding sodium hydroxide (NaOH), and on the other hand, the water quantity and the water quality of the wastewater are homogenized;
after the neutralization adjustment, the wastewater enters a first intermediate water tank 1 for storage and standby.
Processing by an ultrafiltration system:
the pretreated wastewater enters an ultrafiltration membrane for treatment, impurity particles, bacteria, colloid and macromolecular substances with certain sizes in the water are removed in a physical interception mode under the driving of pressure by utilizing the interception capability of a porous material of the ultrafiltration membrane, the ultrafiltration permeate liquid passing through the ultrafiltration membrane enters a second intermediate water tank 2, and the ultrafiltration concentrated water from the outlet of the ultrafiltration membrane returns to the salinization wastewater tank; the ultrafiltration membrane works according to the principle shown in figure 3.
In the step, the ultrafiltration membrane adopts Nanostone Water with the effective membrane area of 24.3m2alpha-Al of (2)2O3A ceramic ultrafiltration membrane which intercepts large-size substances such as thalli, colloid, particles, organic macromolecules and the like in sewage and small-size substances such as water, organic low molecules, inorganic ions and the likeThe other side can be reached through the micropores on the ultrafiltration membrane, so that the separation of organic matters and inorganic salts is realized.
In the step, after the ultrafiltration system is used for treatment, the concentration of pollutants such as organic matters, suspended matters and the like in the permeated ultrafiltration permeating liquid is reduced, and the next treatment is facilitated. The volume of the ultrafiltration permeate was about 90% of the total volume (the sum of the volumes of the ultrafiltration permeate and the ultrafiltration fresh water), i.e., about 18m3A high-salinity permeate; the ultrafiltration concentrated water is about 10 percent, and the main components are suspended matters and organic matters, so that salt basically enters the permeate.
Processing by a nanofiltration purification system:
and (3) the ultrafiltration permeating liquid (a sample B is analyzed, and the analysis result is shown in a table 1) enters a nanofiltration membrane for treatment, and the sewage is further separated into nanofiltration permeating liquid (high-purity saline water, a sample C is analyzed, and the analysis result is shown in a table 1) permeating the nanofiltration membrane and nanofiltration fresh water flowing out from an outlet of the nanofiltration membrane by utilizing the selective separation characteristic of the nanofiltration membrane, namely only allowing water and monovalent ions (such as NaCl) to permeate, and intercepting other organic matters, soluble substances and other high-valence ions.
In the step, the nanofiltration membrane adopts a Suez D series nanofiltration membrane, which only allows water and monovalent ions (such as NaCl) to permeate, and can intercept and concentrate organic matters.
In the step, after the treatment of the nanofiltration system, the salt permeability of the nanofiltration membrane is more than 95%, and the nanofiltration permeation liquid amount accounts for about 70% of the total feed amount of the nanofiltration membrane, so that about 13m can be obtained by separation3The purification of the brine is realized.
Recovering edible salt:
the high-purity salt water is recycled as edible salt after concentration, crystallization, purification and purification.
Biochemical treatment:
the ultrafiltration backwashing water, the nanofiltration backwashing water, the production cleaning water and the domestic sewage enter a sewage adjusting tank to adjust the pH;
intercepting the regulated wastewater by a fine grid or an ultrafine grid;
pumping the intercepted wastewater into a neutralization sedimentation tank through a submersible sewage pump, adding NaOH to further neutralize the pH value of the wastewater, and separating heavy precipitates.
The wastewater after passing through the neutralization sedimentation tank enters an air floatation tank, flocculating agent polyaluminium chloride (PAC) and coagulant aid Polyacrylamide (PAM) are added to react with suspended matters in the sewage to form large-particle alum flocs, and the large-particle alum flocs are adsorbed by micron-sized fine bubbles generated by an air floatation machine and float attached to the alum flocs in the sewage to form floating slag for removal;
the wastewater treated by the air floatation tank enters a hydrolysis acidification tank for hydrolysis acidification;
the wastewater after hydrolytic acidification sequentially enters an A pool and an O pool (the A pool and the O pool are respectively an anoxic pool and an aerobic pool) for anoxic and aerobic treatment; in order to enhance the treatment effect, high molecular fillers with high specific surface area and high affinity to organisms are respectively filled in the anoxic pond and the aerobic pond, so that the microbial concentration of the anoxic pond and the aerobic pond is increased, and the treatment efficiency and the impact resistance are improved;
and (3) introducing the anoxic and aerobic treatments into a secondary sedimentation tank for sedimentation treatment, and discharging the treated water (a sample D is analyzed, and the analysis result is shown in table 1).
Scum generated by the air floatation tank, sludge discharged by the hydrolysis acidification tank, the anoxic tank and the aerobic tank and residual sludge of the secondary sedimentation tank are discharged into a sludge tank, and are dewatered by using the conventional sludge dewatering machine and then are transported out for treatment after sludge concentration.
TABLE 1
| Sample A (raw water intake) | Sample B (nanofiltration influent) | Sample C (nanofiltration effluent) | Sample D (Biochemical effluent) | |
| COD(mg/L) | 33800 | 43500 | 11200 | 95 |
| Suspended substance (mg/L) | 20900 | 3080 | 322 | 102 |
| Ammonia nitrogen (mg/L) | 678 | 1090 | 772 | 40 |
| Total phosphorus (mg/L) | 7.11 | 11.55 | 1.72 | 1.1 |
| Chloride (mg/L) | 57000 | 61200 | 84100 | 2900 |
Remarking: the values in table 1 are values normally processed in the production flow of fig. 1 and are average values of thirty sampling analyses.
After the production flow of this example is operated, the daily treatment capacity of the ultrafiltration membrane is 10, and in a normal treatment condition (wastewater pretreated by 10 days), if the ultrafiltration membrane is treated for one week (7 days), the ultrafiltration membrane cannot be continuously treated, and the ultrafiltration membrane needs to be regenerated to be continuously treated.
In this example, the salt recovery rate was more than 95%.
Example 2
As shown in fig. 2, the ecological treatment device for the high-salt pickle wastewater comprises a neutralization adjusting tank 4, a microfiltration system 18, an ultrafiltration system 5, a nanofiltration system 6, an edible salt recovery system and a sewage treatment station, wherein the microfiltration system 18 is respectively communicated with the neutralization adjusting tank 4 and the ultrafiltration system 5, the ultrafiltration system 5 is also communicated with the nanofiltration system 6, the edible salt recovery system and the sewage treatment station are respectively communicated with the nanofiltration system 6, and the sewage treatment station is also communicated with the ultrafiltration system 5.
In a specific embodiment of this embodiment, the ecological treatment device for high-salt kimchi wastewater further comprises a first intermediate water tank 1 and a second intermediate water tank 2, the first intermediate water tank 1 is respectively communicated with the microfiltration system 18 and the ultrafiltration system 5, and the second intermediate water tank 2 is respectively communicated with the ultrafiltration system 5 and the nanofiltration system 6.
In a specific embodiment of this embodiment, microfiltration system 18 comprises a microfiltration membrane.
In a specific embodiment of this embodiment, the microfiltration system 18 further comprises a microfiltration membrane cleaning system 19.
In a specific embodiment of this embodiment, the ultrafiltration system 5 comprises an ultrafiltration membrane.
In a specific embodiment of this embodiment, the ultrafiltration system 5 further comprises an ultrafiltration membrane cleaning system 16.
In a particular embodiment of this embodiment, the nanofiltration system 6 comprises a nanofiltration membrane.
In a specific embodiment of this embodiment, nanofiltration system 6 further comprises a nanofiltration membrane washing system 17.
In a specific embodiment of the embodiment, the edible salt recovery system comprises a concentration and crystallization device 7, a purification and purification device 8 and a salt recovery device 9, wherein the concentration and crystallization device 7 is communicated with the nanofiltration system 6.
In a particular embodiment of this embodiment, the salt recovery unit 9 is a salt storage tank.
In a specific implementation manner of this embodiment, the sewage treatment station includes a sewage adjusting tank 10, an air flotation tank 12, a hydrolysis acidification tank 13, an a2/O tank 14 and a sedimentation tank 15, the sewage adjusting tank 10 is respectively communicated with the ultrafiltration system 5 and the nanofiltration system 6, the air flotation tank 12 is respectively communicated with the sewage adjusting tank 10 and the hydrolysis acidification tank 13, the a2/O tank 14 is respectively communicated with the hydrolysis acidification tank 13 and the sedimentation tank 15, and the a2/O tank 14 includes an anoxic tank and an aerobic tank.
In a particular embodiment of this embodiment, the sewage treatment station further comprises a grid 11.
When the ecological treatment device of fig. 2 treats the high-salt pickle wastewater, the treatment process is as follows:
preprocessing:
collecting the saline wastewater (sample A is analyzed, and the analysis result is shown in table 2) generated in the production workshop, and intercepting fine suspended matters such as vegetable leaves and the like in the wastewater through a fine grid or an ultrafine grid;
the intercepted saline wastewater enters a neutralization regulation sedimentation tank for neutralization regulation; in the neutralization regulation sedimentation tank, on one hand, the pH of the sewage is regulated by adding sodium hydroxide (NaOH), and on the other hand, the water quantity and the water quality of the wastewater are homogenized;
after neutralization and regulation, the wastewater enters a microfiltration system for treatment; the micro-filtration system utilizes a micro-filtration membrane to carry out the treatment on COD and NH in the wastewater3N, suspended matter and turbidity can be effectively removed; the microfiltration permeating liquid permeating the microfiltration membrane enters a first middle water tank 1 for storage and standby application, and the microfiltration concentrated water coming out of the microfiltration membrane outlet returns to the neutralization regulating tank.
Processing by an ultrafiltration system:
the pretreated microfiltration permeating liquid enters an ultrafiltration membrane for treatment, impurity particles, bacteria, colloid and macromolecular substances with certain sizes in the water are removed in a physical interception mode under the driving of pressure by utilizing the interception capacity of a porous material of the ultrafiltration membrane, the ultrafiltration permeating liquid penetrating through the ultrafiltration membrane enters a second intermediate water tank 2, and the ultrafiltration concentrated water from the outlet of the ultrafiltration membrane enters a subsequent biochemical treatment system for treatment.
In the step, the ultrafiltration membrane adopts Nanostone Water with the effective membrane area of 24.3m2alpha-Al of (2)2O3The ceramic ultrafiltration membrane intercepts large-size substances such as thalli, colloids, particles, organic macromolecules and the like in sewage, and small-size substances such as water, organic low molecules, inorganic ions and the like can reach the other side through micropores in the ultrafiltration membrane, so that the separation of organic matters and inorganic salts is realized.
In the step, after the ultrafiltration system is used for treatment, the concentration of pollutants such as organic matters, suspended matters and the like in the permeated ultrafiltration permeating liquid is further reduced, and the next treatment is facilitated. The volume of the ultrafiltration permeate was about 90% of the total volume (sum of the volume of the ultrafiltration permeate and the ultrafiltration concentrate), i.e., about 18m3A high-salinity permeate; the ultrafiltration concentrated water is about 10 percent, and the main components of the ultrafiltration concentrated water are suspended matters and organic matters, so that salt basically enters the permeate.
Processing by a nanofiltration system:
and (3) the ultrafiltration permeate (a sample B for analysis, and the analysis result is shown in table 2) enters a nanofiltration membrane for treatment, and the sewage is further separated into high-purity brine (a sample C for analysis, and the analysis result is shown in table 2) penetrating the nanofiltration membrane and nanofiltration fresh water from an outlet of the nanofiltration membrane by utilizing the selective separation characteristic of the nanofiltration membrane, namely only allowing water and monovalent ions (such as NaCl) to penetrate through and retaining the rest organic matters, soluble substances and other high-valence ions.
In the step, the nanofiltration membrane adopts a Suez D series nanofiltration membrane, which only allows water and monovalent ions (such as NaCl) to permeate, and can intercept and concentrate organic matters.
In the step, after the treatment of the nanofiltration system, the salt permeability of the nanofiltration membrane is more than 95%, and the nanofiltration permeation liquid amount accounts for about 70% of the total feed amount of the nanofiltration membrane, so that about 13m can be obtained by separation3The purification of the brine is realized.
Recovering edible salt:
the high-purity salt water is recycled as edible salt after concentration, crystallization, purification and purification.
Biochemical treatment:
the ultrafiltration backwashing water and the nanofiltration backwashing water enter a sewage adjusting tank (the workshop cleaning water and the domestic wastewater can also enter the sewage adjusting tank) to adjust the pH value;
intercepting the regulated wastewater by a fine grid or an ultrafine grid;
pumping the intercepted wastewater into a neutralization sedimentation tank through a submersible sewage pump for further regulating pH and carrying out solid-liquid separation, then feeding the wastewater into an air floatation tank, adding flocculating agent polyaluminium chloride (PAC) and coagulant aid Polyacrylamide (PAM) to react with suspended matters in the sewage to form large-particle alum flocs, adsorbing the large-particle alum flocs by utilizing micron-sized fine bubbles generated by an air floatation machine, and floating the alum flocs attached to the sewage to form floating slag for removal;
the wastewater treated by the air floatation tank enters a hydrolysis acidification tank for hydrolysis acidification;
the wastewater after hydrolytic acidification enters an A pool and an O pool in sequence for anoxic and aerobic treatment; the pool A and the pool O are respectively an anoxic pool and an aerobic pool; in order to enhance the treatment effect, high molecular fillers with high specific surface area and high affinity to organisms are respectively filled in the anoxic pond and the aerobic pond, so that the microbial concentration of the anoxic pond and the aerobic pond is increased, and the treatment efficiency and the impact resistance are improved;
the anoxic and aerobic treatments are carried out precipitation treatment in a precipitation tank, and the treated water (a sample D is analyzed, and the analysis result is shown in table 2) is discharged.
Scum generated by the air floatation tank, sludge discharged by the hydrolysis acidification tank, the anaerobic tank, the anoxic tank and the aerobic tank and residual sludge of the secondary sedimentation tank are discharged into a sludge tank, and are dewatered by using the conventional sludge dewatering machine and then are transported outside for treatment after sludge concentration.
TABLE 2
| Sample A (raw water intake) | Sample B (nanofiltration influent) | Sample C (nanofiltration effluent) | Sample D (Biochemical effluent) | |
| COD(mg/L) | 35800 | 44600 | 13400 | 87 |
| Suspended substance (mg/L) | 18700 | 740 | 96 | 48 |
| Ammonia nitrogen (mg/L) | 669 | 1150 | 794 | 37 |
| Total phosphorus (mg/L) | 7.43 | 10.24 | 0.88 | 0.62 |
| Chloride (mg/L) | 57700 | 63000 | 85800 | 2800 |
Remarking: the values in table 21 are values normally processed in the production flow of fig. 2 and are average values of thirty sampling analyses.
After the production flow of the embodiment is operated, the ultrafiltration membrane can be normally produced after being treated for one month in a normal treatment condition (wastewater after being pretreated by 10 methods in daily treatment) by taking the daily treatment capacity of the ultrafiltration membrane as 10 methods.
In this example, the salt recovery rate was more than 95%.
Compared with the embodiment 1, the salt in the sewage is separated and purified in a targeted manner by the combined collocation of microfiltration, ultrafiltration and nanofiltration, then the low-temperature vacuum concentration method is utilized, the high-purity resource recycling of the salt in the salt-containing wastewater is finally realized, meanwhile, the desalted sewage can be stably discharged after reaching the standard for a long time, the production running period is long, the off-line regeneration is less, and the regeneration cost is greatly reduced.
In the present embodiment, the microfiltration membrane may be a flat membrane, a tubular membrane, a hollow fiber membrane, or the like, and is not particularly limited.
In this application, unless otherwise specified, all are prior art.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. The utility model provides an ecological treatment device of high salt pickles waste water which characterized in that: the ecological treatment device of high salt pickled vegetable waste water includes neutralization equalizing basin, ultrafiltration system, nanofiltration system, edible salt recovery system and sewage treatment station, and ultrafiltration system is linked together with neutralization equalizing basin and nanofiltration system respectively, and edible salt recovery system and sewage treatment station communicate with nanofiltration system respectively, and the sewage treatment station still communicates with ultrafiltration system.
2. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in claim 1, wherein: the ecological treatment device for the high-salt pickle wastewater further comprises a first middle water tank and a second middle water tank, wherein the first middle water tank is communicated with the neutralization regulating tank and the ultrafiltration system respectively, and the second middle water tank is communicated with the ultrafiltration system and the nanofiltration system respectively.
3. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in claim 1, wherein: the ecological treatment device for the high-salt pickle wastewater further comprises a microfiltration system, and the microfiltration system is communicated with the ultrafiltration system and the neutralization regulating tank respectively.
4. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in claim 3, wherein: the ecological treatment device for the high-salt pickle wastewater further comprises a first middle water tank and a second middle water tank, wherein the first middle water tank is communicated with the microfiltration system and the ultrafiltration system respectively, and the second middle water tank is communicated with the ultrafiltration system and the nanofiltration system respectively.
5. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in claim 3, wherein: the microfiltration system comprises a microfiltration membrane and a microfiltration membrane cleaning system.
6. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in any one of claims 1 to 5, wherein: the ultrafiltration system comprises an ultrafiltration membrane and an ultrafiltration membrane cleaning system.
7. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in any one of claims 1 to 5, wherein: the nanofiltration system comprises a nanofiltration membrane and a nanofiltration membrane cleaning system.
8. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in any one of claims 1 to 5, wherein: the edible salt recovery system comprises a concentration crystallization device, a purification device and a salt recovery device, wherein the concentration crystallization device is communicated with the nanofiltration system.
9. The ecological treatment apparatus of high-salt kimchi wastewater as set forth in any one of claims 1 to 5, wherein: the sewage treatment station comprises a sewage adjusting tank, an air flotation tank, a hydrolysis acidification tank, an A2/O tank and a sedimentation tank, wherein the sewage adjusting tank is communicated with an ultrafiltration system and a nanofiltration system respectively, the air flotation tank is communicated with the sewage adjusting tank and the hydrolysis acidification tank respectively, the A2/O tank is communicated with the hydrolysis acidification tank and the sedimentation tank respectively, and the A2/O tank comprises an anoxic tank and an aerobic tank.
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