CN114477566B - Wastewater treatment process and system for hemodialysis - Google Patents
Wastewater treatment process and system for hemodialysis Download PDFInfo
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- CN114477566B CN114477566B CN202210327884.6A CN202210327884A CN114477566B CN 114477566 B CN114477566 B CN 114477566B CN 202210327884 A CN202210327884 A CN 202210327884A CN 114477566 B CN114477566 B CN 114477566B
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- 238000001631 haemodialysis Methods 0.000 title claims abstract description 91
- 230000000322 hemodialysis Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 77
- 238000001728 nano-filtration Methods 0.000 claims abstract description 76
- 239000002351 wastewater Substances 0.000 claims abstract description 71
- 150000001408 amides Chemical class 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000003621 irrigation water Substances 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 241000894006 Bacteria Species 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 238000001914 filtration Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- 239000011550 stock solution Substances 0.000 claims description 14
- 239000006228 supernatant Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000012466 permeate Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 6
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- External Artificial Organs (AREA)
Abstract
The invention relates to a wastewater treatment process and a wastewater treatment system for hemodialysis. Aiming at physical and chemical properties including pH 7.1-7.5, conductivity 15000-532.6-40mg/L, Kjeldahl nitrogen 51-60mg/L, chloride 247-270mg/L, sulfate 91.3-100mg/L, phosphorus 62-E80mg/L of hemodialysis wastewater with the bacteria number of 472-500 CFU/mL, and the ATF-50 polypiperazine amide nanofiltration membrane is selected, so that the treated hemodialysis wastewater meets the use standard of agricultural irrigation water under the appropriate process parameters, the wastewater discharge amount is reduced, and the recycling efficiency of water resources is improved.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a wastewater treatment process and system for hemodialysis.
Background
Hemodialysis refers to a process of draining blood of a patient to extracorporeal circulation, removing solutes and moisture in the blood in a semipermeable membrane by using principles such as dispersion, convection and the like so as to achieve the purposes of removing metabolic wastes or poisons in vivo and correcting imbalance of water, electrolytes and acid-base, and finally returning the blood to the body of the patient.
A large amount of waste water is generated during hemodialysis, and the waste water is characterized by containing a large amount of blood metabolites such as urea and phosphorus, and has negative effects on the environment if directly discharged. Therefore, it is necessary to design a wastewater treatment process for hemodialysis wastewater to improve the wastewater utilization rate.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a wastewater treatment process for hemodialysis, by which hemodialysis wastewater can be converted into agricultural water resources.
The invention provides a treatment process of wastewater for hemodialysis, which comprises the following steps:
taking hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 6.9-9.0, stirring and filtering at normal temperature, and taking supernatant to perform nanofiltration membrane treatment, wherein the specific method comprises the following steps: enabling the hemodialysis wastewater to penetrate a nanofiltration membrane under the operation pressure of 1.2-3.2MPa at the temperature of 25 ℃, wherein the volume ratio of stock solution to concentrated solution after the nanofiltration membrane treatment is 1.5-3.2;
the physicochemical properties of the hemodialysis wastewater include: pH 7.1-7.5, conductivity 15000-5 32.6-40mg/L, Kjeldahl nitrogen 51-60mg/L, chloride 247-270mg/L, sulfate 91.3-100mg/L, phosphorus 62-80mg/L, and bacteria number 472-500 CFU/mL.
Preferably, the substance for adjusting the pH is sodium hydroxide.
Preferably, the substance for adjusting the pH is concentrated sulfuric acid.
Preferably, the nanofiltration membrane is an ATF-50 polypiperazine amide nanofiltration membrane.
Preferably, the hemodialysis wastewater after treatment meets the use standard of agricultural irrigation water.
Furthermore, the invention also provides a wastewater treatment system for hemodialysis, which is suitable for the wastewater treatment process for hemodialysis.
Preferably, the wastewater treatment system for hemodialysis comprises a regulating device, a filtering device, a storage tank and a nanofiltration membrane device; the inlet of the adjusting device is used for being communicated with a wastewater discharge port of the hemodialysis machine body, the outlet of the adjusting device is communicated with the inlet of the filtering device, the outlet of the filtering device is communicated with the inlet of the storage tank, the outlet of the storage tank is communicated with the inlet of the nanofiltration membrane device, and the outlet of the nanofiltration membrane device is a system outlet; the adjusting device is used for adjusting the pH value of the wastewater of the hemodialysis machine body.
Preferably, the adjusting device is provided with a containing cavity, and the adjusting device is provided with a stirring shaft, a sodium hydroxide liquid adding part and a pH value detector which respectively extend into the containing cavity.
Preferably, the wastewater outlet of the hemodialysis machine body, the adjusting device, the filtering device, the storage tank and the nanofiltration membrane device are respectively communicated through pipelines, and valves are respectively arranged on the pipelines.
Preferably, the hemodialysis machine body and the hemodialysis wastewater treatment system form a complete machine.
Theory of pertinenceThe chemical properties include pH 7.1-7.5, conductivity 15000-5 32.6-40mg/L, Kjeldahl nitrogen 51-60mg/L, chloride 247-plus 270mg/L, sulfate 91.3-100mg/L, phosphorus 62-80mg/L, bacteria 472-plus 500 CFU/mL hemodialysis wastewater, and the invention selects the ATF-50 polypiperazine amide nanofiltration membrane, under proper technological parameters, the treated hemodialysis wastewater meets the use standard of agricultural irrigation water, thereby reducing the wastewater discharge amount and improving the recycling efficiency of water resources.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view showing the structure of an embodiment of a wastewater treatment system for hemodialysis according to the present invention.
Description of reference numerals:
100. a waste water outlet of the hemodialysis machine body; 200. a valve; 300. an adjustment device; 301. a stirring shaft; 302. a sodium hydroxide charging part; 303. a pH value detector; 400. a filtration device; 500. a storage tank; 600. a nanofiltration membrane device; 700. a system outlet; 800. and (5) a complete machine.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The test sample of the present invention was obtained from hemodialysis waste water of a certain hospital, and the physicochemical properties of the hemodialysis waste water are shown in table 1.
Note: the dimension of the conductivity in Table 1 is μ S/cm; the dimension of the bacteria number is CFU/mL, and the dimension of the rest materials is mg/L.
The technical effects of the present invention are demonstrated below by specific examples, but the embodiments of the present invention are not limited thereto.
Example 1
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physical and chemical properties of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Example 2
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 9.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Example 3
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 6.7 by using concentrated sulfuric acid, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Example 4
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (3) at 25 ℃ and under the operating pressure of 1.2MPa, enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Example 5
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 3.2MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Example 6
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physical and chemical properties of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (3) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 2.3.
Example 7
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (3) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 3.2.
Comparative example 1
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 5.0 by using concentrated sulfuric acid, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physical and chemical properties of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Comparative example 2
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 10.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Comparative example 3
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physical and chemical properties of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 0.5MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Comparative example 4
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 3.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 1.5.
Comparative example 5
Taking 1L of hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 8.0 by using sodium hydroxide, stirring and filtering at normal temperature, taking supernatant liquid to perform nanofiltration membrane treatment, and testing the physicochemical property of nanofiltration membrane permeate after the treatment. The specific method comprises the following steps: and (2) enabling the hemodialysis wastewater to penetrate through an ATF-50 polypiperazine amide nanofiltration membrane under the operation pressure of 2.7MPa at the temperature of 25 ℃, wherein the volume ratio of the stock solution to the concentrated solution after the nanofiltration membrane treatment is 5.0.
The physicochemical property of the nanofiltration membrane permeate is evaluated according to the FAO/WHO irrigation water standard, and when the physicochemical property of the nanofiltration membrane permeate meets the FAO/WHO irrigation water standard, the experimental effect of the wastewater treatment is determined to be qualified. Specifically, the FAO/WHO irrigation water standards are shown in table 2.
Note: the dimension of the conductivity in Table 2 is μ S/cm; the dimension of the bacteria number is CFU/mL, and the dimension of the rest materials is mg/L.
Experiments show that the nanofiltration membrane permeate of the embodiments 1 to 7 meets the FAO/WHO irrigation water standard, and the comparative examples 1 to 5 cannot meet the FAO/WHO irrigation water standard, namely, the invention can effectively treat the hemodialysis wastewater under proper process conditions and convert the hemodialysis wastewater into agricultural water resources.
In order to achieve the above purpose, referring to fig. 1, the present invention further provides a wastewater treatment system for hemodialysis, which is suitable for the above wastewater treatment process for hemodialysis.
Preferably, the wastewater treatment system for hemodialysis comprises a conditioning device 300, a filtering device 400, a storage tank 500 and a nanofiltration membrane device 600; wherein the inlet of the adjusting device 300 is used for communicating with the wastewater discharge outlet 100 of the hemodialysis machine body, the outlet of the adjusting device 300 is communicated with the inlet of the filtering device 400, the outlet of the filtering device 400 is communicated with the inlet of the storage tank 500, the outlet of the storage tank 500 is communicated with the inlet of the nanofiltration membrane device 600, and the outlet of the nanofiltration membrane device 600 is a system outlet 700; the adjusting device 300 is used for adjusting the pH value of the wastewater of the hemodialysis machine body.
Preferably, the adjusting device 300 is formed with a receiving cavity, and the adjusting device 300 is provided with a stirring shaft 301, a sodium hydroxide charging part 302 and a pH detector 303 which respectively extend into the receiving cavity.
Preferably, the wastewater outlet 100 of the hemodialysis machine body, the adjusting device 300, the filtering device 400, the storage tank 500 and the nanofiltration membrane device 600 are communicated with each other through pipelines, and the pipelines are respectively provided with a valve 200.
Preferably, the hemodialysis machine body and the hemodialysis wastewater treatment system form a complete machine 800, so that each hemodialysis machine can be provided with a wastewater treatment system, and the liquids discharged from the system outlets 700 can be collected individually, or each system outlet 700 can be connected to a collection pipeline for collective collection. Of course, a pump is also provided in the present invention to provide power for the fluid flow of the present invention. The valve 200 is an electrically controlled valve.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be also considered as the protection scope of the present invention.
Claims (2)
1. A wastewater treatment process for hemodialysis is characterized in that a wastewater treatment system for hemodialysis is adopted for wastewater treatment, the hemodialysis wastewater treatment meets the use standard of agricultural irrigation water, and the wastewater treatment system for hemodialysis comprises a regulating device, a filtering device, a storage tank and a nanofiltration membrane device; the inlet of the adjusting device is used for being communicated with a wastewater discharge port of the hemodialysis machine body, the outlet of the adjusting device is communicated with the inlet of the filtering device, the outlet of the filtering device is communicated with the inlet of the storage tank, the outlet of the storage tank is communicated with the inlet of the nanofiltration membrane device, and the outlet of the nanofiltration membrane device is a system outlet; the adjusting device is used for adjusting the pH value of the wastewater of the hemodialysis machine body; the adjusting device is provided with a stirring shaft, a sodium hydroxide liquid adding part and a pH value detector which respectively extend into the accommodating cavity; the waste water outlet of the hemodialysis machine body, the adjusting device, the filtering device, the storage tank and the nanofiltration membrane device are respectively communicated through pipelines, and valves are respectively arranged on the pipelines; the hemodialysis machine body and the wastewater treatment system for hemodialysis form a whole machine; the treatment process comprises the following steps:
taking hemodialysis wastewater, adjusting the pH value of the hemodialysis wastewater to 9.0, stirring and filtering at normal temperature, and taking supernatant liquid to perform nanofiltration membrane treatment, wherein the specific method comprises the following steps: enabling the hemodialysis wastewater to penetrate a nanofiltration membrane at the temperature of 25 ℃ and under the operation pressure of 1.2-3.2MPa, wherein the volume ratio of a stock solution to a concentrated solution after the nanofiltration membrane treatment is 1.5-3.2, and the nanofiltration membrane is an ATF-50 polypiperazine amide nanofiltration membrane;
the physical and chemical properties of the hemodialysis wastewater comprise: pH 7.1-7.5, conductivity 15000-5 32.6-40mg/L, Kjeldahl nitrogen 51-60mg/L, chloride 247-270mg/L,91.3-100mg/L sulfate, 62-80mg/L phosphorus, 472 bacteria and 500 CFU/mL.
2. The process according to claim 1, wherein the pH-adjusting substance is sodium hydroxide.
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| CN202210327884.6A CN114477566B (en) | 2022-03-31 | 2022-03-31 | Wastewater treatment process and system for hemodialysis |
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| CN202210327884.6A CN114477566B (en) | 2022-03-31 | 2022-03-31 | Wastewater treatment process and system for hemodialysis |
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| EP2277572B2 (en) * | 2009-07-22 | 2020-04-01 | Bellco S.r.l. | Dialysis machine with regeneration system |
| CN109646743A (en) * | 2019-01-07 | 2019-04-19 | 哈尔滨工业大学（威海） | A kind of method of haemodialysis waste water recycling |
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