CN111056701A - Wastewater composite disinfection process for harmless treatment of livestock and poultry died of diseases - Google Patents
Wastewater composite disinfection process for harmless treatment of livestock and poultry died of diseases Download PDFInfo
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- CN111056701A CN111056701A CN201911235350.5A CN201911235350A CN111056701A CN 111056701 A CN111056701 A CN 111056701A CN 201911235350 A CN201911235350 A CN 201911235350A CN 111056701 A CN111056701 A CN 111056701A
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 244000144972 livestock Species 0.000 title claims abstract description 15
- 244000144977 poultry Species 0.000 title claims abstract description 15
- 201000010099 disease Diseases 0.000 title claims abstract description 14
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 title claims abstract description 14
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000460 chlorine Substances 0.000 claims abstract description 16
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 16
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 241000894006 Bacteria Species 0.000 claims abstract description 13
- 238000005189 flocculation Methods 0.000 claims abstract description 4
- 230000016615 flocculation Effects 0.000 claims abstract description 4
- 230000001678 irradiating effect Effects 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 238000009287 sand filtration Methods 0.000 claims abstract description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000011550 stock solution Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 230000002550 fecal effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 7
- 239000005708 Sodium hypochlorite Substances 0.000 abstract description 5
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 244000005700 microbiome Species 0.000 description 7
- 230000001954 sterilising effect Effects 0.000 description 5
- 230000000711 cancerogenic effect Effects 0.000 description 4
- 231100000315 carcinogenic Toxicity 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 108020004414 DNA Proteins 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- RWQNBRDOKXIBIV-UHFFFAOYSA-N thymine Chemical group CC1=CNC(=O)NC1=O RWQNBRDOKXIBIV-UHFFFAOYSA-N 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- 108091093078 Pyrimidine dimer Proteins 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 230000001850 reproductive effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a waste water composite disinfection process for harmless treatment of livestock and poultry died of diseases, which adopts a process of ultraviolet ray and sodium hypochlorite composite disinfection, mutually gains advantages and complements each other, has synergistic effect, can kill bacteria more efficiently, and can make up for the defects that the ultraviolet ray only propagates along a straight line and has dead angles in disinfection. The invention carries out the treatment of the following process steps on the wastewater: (1) oil removal pretreatment; (2) a. the2O, AO secondary biological treatment; (3) performing flocculation precipitation and sand filtration advanced treatment; (4) irradiating the wastewater treated in the step (3) by using composite ultraviolet with the wavelength of 253.7nm and the wavelength of 184.9 nm; the ultraviolet light source with the wavelength of 253.7nm is arranged at the center of the tank body, and the ultraviolet light source with the wavelength of 184.9nm is arranged at the corner of the tank body; the ultraviolet light sources are distributed in a water-immersed manner; (5) and (4) continuously adding NaClO into the wastewater treated in the step (4) to ensure that the residual chlorine is not less than 0.5 mg/L.
Description
Technical Field
The invention belongs to the field of wastewater disinfection, and is mainly applied to disinfection of wastewater treatment tail ends of harmless treatment projects of livestock and poultry died of diseases.
Background
The invention belongs to the field of wastewater disinfection, and is mainly applied to the wastewater treatment end of harmless treatment projects of livestock and poultry died of diseases (faecal coliform 1.7X 10)4～2.2X104In the MPN/L range, COD is less than or equal to 100mg/L, ammonia nitrogen is less than or equal to 100mg/L, turbidity is less than or equal to 2-3 NTU, and pH is 6-8).
The livestock and poultry dead of diseases carry a large amount of pathogens, and the waste water discharged in the harmless treatment process also has part of incompletely killed pathogens and bacterial microorganisms, so the waste water can be discharged after being disinfected. In the conventional disinfection process, the chlorine disinfectant is easy to generate carcinogenic secondary pollutants; the penetration capacity is weak during ultraviolet disinfection, and the residual disinfection capacity is not available; ozone disinfection has no continuous sterilization capability and poor stability.
In the field of water treatment, common disinfection methods include chlorine disinfection, sodium hypochlorite disinfection, chlorine dioxide disinfection, ozone disinfection, ultraviolet disinfection, active oxygen disinfection and the like. The effect of chlorine disinfection is related to water temperature, pH, contact time, mixing degree, sewage turbidity, contained interference substances and available chlorine, the effect of chlorine disinfection is reliable, and the disinfection effect is continuous, but residual chlorine and certain chlorine-containing compounds are toxic to aquatic organisms, and carcinogenic substances can be generated after organic matters in sewage are chlorinated; the chlorine dioxide has good disinfection effect, can effectively control the chromaticity, smell and taste of water, does not generate organic chloride, has continuous disinfection effect, but needs to be prepared on site, has high preparation cost, is difficult to store raw materials, is volatile, and is easy to explode in gas and liquid; the ozone disinfection efficiency is high, the ozone disinfection has stronger sterilization effect than chlorine disinfection, the effect on bacteria is faster than chlorine, the consumption is obviously smaller, the residual organic matters, color, taste and the like in sewage can be effectively degraded, chlorophenol odor, trihalomethane and other chlorine disinfection byproducts and chlorinated organic matters are not generated, but the disinfection cost is high, the equipment is complex, the operation and management are difficult, and the continuous disinfection effect is not generated; the ultraviolet ray disinfection efficiency is high, the sterilization effect is fast, no odor is generated, no organic by-product is generated, but the ultraviolet ray irradiation lamp has high replacement frequency, more power consumption and no continuous disinfection effect, the disinfection effect is greatly influenced by turbidity and suspended matters, and the problem of light revival of microorganisms possibly exists.
Any method alone cannot completely adapt to the current complex water quality condition and increasingly strict process discharge requirements.
Disclosure of Invention
Aiming at the defects in the prior art, the invention discloses a waste water composite disinfection process for harmless treatment of livestock and poultry died of diseases, which adopts a process of ultraviolet ray and sodium hypochlorite composite disinfection, makes up for the deficiencies of each other and has synergistic effect, can kill bacteria more efficiently, and can make up for the defects that the ultraviolet ray only propagates along a straight line and has dead angles in disinfection.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the waste water composite disinfection process for the harmless treatment of livestock and poultry died of diseases is characterized in that the waste water is treated by the following process steps:
(1) oil removal pretreatment; (2) a. the2O, AO secondary biological treatment; (3) performing flocculation precipitation and sand filtration advanced treatment;
(4) irradiating the wastewater treated in the step (3) by using composite ultraviolet with the wavelength of 253.7nm and the wavelength of 184.9 nm; the ultraviolet light source with the wavelength of 253.7nm is arranged at the center of the tank body, and the ultraviolet light source with the wavelength of 184.9nm is arranged at the corner of the tank body; the ultraviolet light sources are distributed in a water-immersed manner;
(5) and (4) continuously adding NaClO into the wastewater treated in the step (4) to ensure that the residual chlorine is not less than 0.5 mg/L.
As a preferred embodiment of the present invention: in the step (4), the ozone decomposition reaction formula after the wastewater is irradiated by the 184.9nm ultraviolet ray is as follows:
2O3+H2O2→2OH·+3O2
as a preferred embodiment of the present invention: the peak design dose of the ultraviolet light source is not less than 100mJ/cm2。
As a preferred embodiment of the present invention: the concentration of the NaClO stock solution used in the step (5) is 10%, and the proportioning concentration is 3 per mill.
As a preferred embodiment of the present invention: the steps (1) to (3) mean that in the wastewater treated by the steps (1), (2) and (3):
faecal coliform 1.7X104～2.2X104In the range of MPN/L,
COD is less than or equal to 100mg/L, ammonia nitrogen is less than or equal to 100mg/L, turbidity is less than or equal to 2-3 NTU, and pH is 6-8.
The invention has the beneficial effects that:
the disinfection process is not a traditional single disinfection process, is not simple in process superposition, but plays a role in synergy, can kill bacteria more efficiently, can make up for the defects that ultraviolet rays only propagate along a straight line and have dead angles in disinfection, can effectively eliminate residual refractory organic matters, chromaticity, smell, taste and the like in water, ensures continuous disinfection, greatly reduces the dosage of rear-end NaClO, only protects residual chlorine, has obvious control on trihalomethane generation, and basically hardly generates carcinogenic substances (THM); the invention aims to solve the defects that the ultraviolet ray disinfection process only propagates along a straight line, has dead angles in disinfection, has a disinfection effect greatly influenced by suspended matters and does not have residual disinfection capacity.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The waste water composite disinfection process for the harmless treatment of the livestock and poultry died of diseases disclosed by the invention adopts the combined disinfection process of ultraviolet rays and sodium hypochlorite, makes up for the deficiencies of each other, is safe and reliable to operate, and does not generate toxic byproducts.
Specifically, the wastewater after harmless treatment of livestock and poultry died of diseases is subjected to oil removal pretreatment, A2O, AO secondary biological siteAfter flocculation precipitation and sand filtration advanced treatment, the most important link of advanced treatment is disinfection, the invention adopts a process of ultraviolet ray and sodium hypochlorite composite disinfection, and the composite disinfection process in the specific disinfection process is as follows:
the ultraviolet disinfection mechanism is that the nucleic acid of bacteria, viruses, spores and other pathogenic bacteria is utilized to destroy the molecular structure after absorbing ultraviolet rays, so that the synthesis of protein and enzyme in thallus is hindered, and finally the bacteria die. The ultraviolet disinfection generally refers to the use of wide ultraviolet with the wavelength of 253.7nm, the design uses the ultraviolet as the ultraviolet with the wavelength of 253.7nm and the wavelength of 184.9nm, the arrangement of an ultraviolet light source adopts a water-invasion type, and the peak design dose is not lower than 100mJ/cm2. Ultraviolet ray with wavelength of 184.9nm is mainly used at the corner of the pool body, ultraviolet ray with wavelength of 253.7nm is used for killing bacteria by irradiating DNA of microorganism, and ultraviolet ray with wavelength of 185nm (184.9 nm in the embodiment) is used for changing residual small amount of dissolved oxygen in water into O3(ozone), under the irradiation of ultraviolet rays, the decomposition process of ozone is changed according to the following formula:
2O3+H2O2→2OH·+3O2
h gamma in the above formula is illumination; particularly, the ultraviolet irradiation with the wavelength of 184.9nm is adopted in the embodiment; ozone is rapidly decomposed to generate more active groups OH, under the radiation of ultraviolet rays, the oxidation reaction speed of hydroxyl free radicals OH and organic pollutants is improved by several orders of magnitude, the chain structure of organisms can be quickly destroyed to cause the death of microorganisms, bacteria can be killed more efficiently, the defects that ultraviolet rays are only transmitted along a straight line and have dead angles in disinfection can be overcome, and residual organic matters which are difficult to degrade, chromaticity, smell, taste and the like in water can be effectively eliminated.
Because two adjacent thymines on a microorganism DNA chain form thymine dimers through the action of ultraviolet rays, the DNA cannot be normally copied to cause the microorganism to lose the reproductive capacity, but the continuous sterilization capacity is not available, in order to avoid the light revival of inactivated bacteria (the thymine dimers can be disintegrated and recover the reproductive capacity under the condition that the inactivated microorganisms are irradiated by visible light within 30 min) and the long-time re-breeding of bacteria in a clean water tank, NaClO (stock solution concentration is 10 percent, and the proportioning concentration is 3 per thousand) is required to be used for continuous sterilization, a NaClO medicament is automatically and continuously added, the residual chlorine is ensured to be not less than 0.5mg/L, and the re-breeding of bacteria is prevented.
It should be noted that the disinfection process of the present invention is not a traditional single disinfection process, is not a simple process superposition, but exerts a synergistic effect, can kill bacteria more efficiently, can make up for the defect that ultraviolet rays only propagate along a straight line and have dead angles in disinfection, can effectively eliminate residual refractory organics, chromaticity, smell, taste, etc. in water, ensures continuous disinfection, greatly reduces the dosage of the NaClO at the rear end, only protects residual chlorine, has obvious control on the generation of trihalomethane, and basically hardly generates carcinogenic substances (THM).
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the protection scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (5)
1. The waste water composite disinfection process for the harmless treatment of livestock and poultry died of diseases is characterized in that the waste water is treated by the following process steps:
(1) oil removal pretreatment; (2) a. the2O, AO two-stageBiological treatment; (3) performing flocculation precipitation and sand filtration advanced treatment;
(4) irradiating the wastewater treated in the step (3) by using composite ultraviolet with the wavelength of 253.7nm and the wavelength of 184.9 nm; the ultraviolet light source with the wavelength of 253.7nm is arranged at the center of the tank body, and the ultraviolet light source with the wavelength of 184.9nm is arranged at the corner of the tank body; the ultraviolet light sources are distributed in a water-immersed manner;
(5) and (4) continuously adding NaClO into the wastewater treated in the step (4) to ensure that the residual chlorine is not less than 0.5 mg/L.
2. The compound wastewater disinfection process for the harmless treatment of livestock and poultry died of illness as claimed in claim 1, wherein in step (4), the ozone decomposition reaction formula after the 184.9nm ultraviolet radiation of wastewater is as follows:
2O3+H2O2→2OH·+3O2。
3. the composite wastewater disinfection process for the harmless treatment of livestock and poultry died of diseases as claimed in claim 1, wherein the peak design dose of said ultraviolet light source is not less than 100mJ/cm2。
4. The composite wastewater disinfection process for the harmless treatment of livestock and poultry died of diseases as claimed in claim 1, wherein the concentration of the stock solution of NaClO used in the step (5) is 10%, and the proportioning concentration is 3 ‰.
5. The composite wastewater disinfection process for the harmless treatment of livestock and poultry died of diseases as claimed in claim 1, wherein in the wastewater treated by the steps (1) to (3):
fecal coliform bacteria 1.7X104～2.2×104In the range of MPN/L,
COD is less than or equal to 100mg/L, ammonia nitrogen is less than or equal to 100mg/L, turbidity is less than or equal to 2-3 NTU, and pH is 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235350.5A CN111056701A (en) | 2019-12-05 | 2019-12-05 | Wastewater composite disinfection process for harmless treatment of livestock and poultry died of diseases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235350.5A CN111056701A (en) | 2019-12-05 | 2019-12-05 | Wastewater composite disinfection process for harmless treatment of livestock and poultry died of diseases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111056701A true CN111056701A (en) | 2020-04-24 |
Family
ID=70299875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911235350.5A Pending CN111056701A (en) | 2019-12-05 | 2019-12-05 | Wastewater composite disinfection process for harmless treatment of livestock and poultry died of diseases |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111056701A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277681A (en) * | 2021-06-11 | 2021-08-20 | 湖北近水环境工程有限公司 | Ecological treatment method of wastewater |
| CN113582414A (en) * | 2021-06-25 | 2021-11-02 | 清华大学 | Water treatment method for performing synergistic disinfection by using ozone/ultraviolet/chlorine |
-
2019
- 2019-12-05 CN CN201911235350.5A patent/CN111056701A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277681A (en) * | 2021-06-11 | 2021-08-20 | 湖北近水环境工程有限公司 | Ecological treatment method of wastewater |
| CN113582414A (en) * | 2021-06-25 | 2021-11-02 | 清华大学 | Water treatment method for performing synergistic disinfection by using ozone/ultraviolet/chlorine |
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