CN102060370B - Method for rapid disinfection of medical wastewater - Google Patents
Method for rapid disinfection of medical wastewater Download PDFInfo
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- CN102060370B CN102060370B CN201010571634A CN201010571634A CN102060370B CN 102060370 B CN102060370 B CN 102060370B CN 201010571634 A CN201010571634 A CN 201010571634A CN 201010571634 A CN201010571634 A CN 201010571634A CN 102060370 B CN102060370 B CN 102060370B
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- waste water
- medical waste
- disinfecting
- voltage pulse
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Abstract
The invention belongs to the technical field of environmental protection, wastewater treatment in special industries and other applications, and relates to a method for rapid disinfection of medical wastewater. The method can disinfect medical wastewater with hydroxyl free radical solution in a short-distance (5-10 m) delivery pipe, has high ozone mass transfer efficiency, and overcomes the shortcoming that the concentration of total residual chlorine after treatment of medical wastewater with ordinary disinfectant is too high. The method has the advantages of high effluent water quality, instantaneous decomposition of residual ozone and hydroxyl solution and no secondary pollution, and is suitable for generalization and application.
Description
Technical field:
The invention belongs to applied technical fields such as environment protection, special industry wastewater treatment; Relate generally to a kind of method that medical waste water is disinfected, particularly relate to a kind of in transport pipe ozone mix with water and generate the hydroxyl free based sols and carry out the quick disinfectant method of medical waste water.
Background technology:
Pathogenic micro-organism in the medical waste water mainly contains: pathogenic bacteria, four types of enterovirus, worm egg and protozoons.Specifically comprise salmonella dysentery bacterium, vibrio cholerae, pathogenic colon bacillus, infectious hepatitis virus, poliovirus, Coxsackie virus, roundworm egg, hookworm ovum, schistosome ovum, ameba.Total plate count reaches millions of to several ten million for every milliliter in the most of medical waste waters of China; Wherein more than 200,000, the pathogen enterobacteria recall rate reaches 30%～100% to every milliliter of sewage of coliform group count mostly, and hospital discharges the medical waste water that hundreds and thousands of tons contain infectivity cause of disease bacterium every day; These waste water such as untimely processing; After municipal wastewater pipeline entering sewage work, cause the downgrade of handling back water, influence people's health.And for these the most potential contagium of dangerous multiple diseases, have only through WWT, from sewage, check out, just can come to light and prevent.It is the primary goal of medical waste water control that the control medical waste water pollutes.Particularly, to make the medical waste water discharging reach state specified standards exactly." general practice mechanism and other medical institutions' water disposal of pollutants limit values (annual average) " in the Discharge standard of water pollutants for medical organization (GB18466-2005) of China's formulation in 2005, regulation: (1) must not detect pathogen enterobacteria, enterovirus.(2) the excrement colibacillus group number every liter must not be greater than 500.(3) total residual chlorine (adopt chlorine-containing disinfectant carry out disinfection technology): must not (emission standard: antisepsis contact tank Jie touches Shi Jian ≧ 1h, contact tank total residual chlorine 3 ~ 10mg/L) greater than 0.5mg/L.
The medicament of killing pathogenic bacterium at present mainly contains eight kinds: (1) chlorinated lime; (2) bleaching is brilliant; (3) Youxiaolin; (4) liquid chlorine; (5) ozone; (5) electrolysis chlorine dioxide; (7) chemical method chlorine dioxide; (8) disinfection by ultraviolet light.Medical waste water treatment station liquid chlorine sterilization commonly used or Youxiaolin sterilization, the sewage ground of small hospital also can adopt javellization.Adopt the liquid chlorine sterilization, use chlorinating machine, throw in liquid chlorine with chlorination at regular time and quantity.Through the sewage that one-level is handled, chlorine dosage can be decided to be 20～30mg/L; Through the sewage of second-stage treatment, chlorine dosage can be decided to be 10～20mg/L.Actual chlorine dosage is adjusted by residual chlorine amount in the outlet sewage.But adopt the sodium chloride solution of VAL-DROP sterilization electrolysis high density, produce the dark liquid of Youxiaolin.Also can directly use the chlorine bleach liquor, row sterilization when adopting siphonage to render in the sewage, chlorine dosage tested liquid chlorine disinfectant method is confirmed.Adopt ozone disinfection, to the medical waste water disinfection, also can effectively prevent the deactivation of virus through ozone.Disinfection by ultraviolet light receives the restriction of transparence, is used for medical waste water and handles unsatisfactory.
Sterilization is to be used for resisting the last mean of defense that the whole bag of tricks is handled the residual bacterial pollutant in back, and the sterilization of chlorine oxygen is present state-of-the-art sterilization means.Oxygen is that sterilizing agent has characteristics such as sterilization is quick, thorough, wide spectrum.Chlorine is that sterilizing agent is the most frequently used sterilizing agent, in anti-sealing spreads disease, plays an important role.Chlorine forms cold chloric acid after being added to and not containing in the organic pure water soon, and cold chloric acid is killed intestinal bacteria and only needed several minutes, wants one hour but kill some virus; As there being organism in the water, chlorine can react with these materials, only if chlorine-throwed quantity is big, otherwise free chlorine can not occur in the water.Sterilizing agent must effectively contact the ability kill bacteria with bacterium, in order to guarantee the sterilization of best effect, arranged certain duration of contact, and good mixing is one of prerequisite that improves germ-killing efficiency.Chlorine oxygen sterilizing agent has the advantage of various sterilizing agents concurrently, has complementation and synergy, and its sterilization speed, efficient, broad spectrum are that any single type sterilizing agent is incomparable.After mixing disinfectant is added in the water body, the ClO of strong oxidizing property
2And O
3Have an effect at first, they at first with water in reducing substances (organism) reaction, both eliminated handle in issuable chlorinatedorganic, bring into play germicidal action efficiently for mixing disinfectant again and cleared away obstacle.O in sterilization process
3And H
2O
2Can be exhausted very soon, and ClO
2, Cl
2Then can provide chlorine residue to continue germicidal action.The existence of chlorine residue was the principal element that influences sterilisation effect and continue sterilizing ability after contact reacts was accomplished.The chlorine residue deficiency does not reach predetermined sterilisation purpose, and residual chlorine amount is too high, causes the waste of sterilizing agent.Should realize the automatic control of chlorine residue according to hospital's particular case.
Ozone technology is not only ancient but also brand-new technology, and the Germanization scholar had invented this technology in 1840, is used to water treatment sterilization industry in 1856.At present, ozone has been widely used in fields such as water treatment, purifying air, food-processing, medical treatment, medicine, aquaculture, and great pushing effect has been played in the development of these industries.Ozone can use ozonizer to produce; Its generating principle ozone can obtain through methods such as effluve, corona discharge, electrochemistry, photochemistry, atomic radiations; Principle is to utilize high-tension electricity or chemical reaction; Making airborne part oxygen decompose post polymerization is ozone, is a kind of process of the polymorphic transformation of oxygen.Ozone is a kind of strong oxidizer, and sterilization process belongs to the biochemical oxidation reaction.Ozone sterilization is the bacteriolyze level method, and sterilization is thorough, noresidue, and sterilization wide spectrum, but kill vegetative forms of bacteria and gemma, virus, fungi etc., and can destroy Toxins, botulin.In addition, O
3Mould also there is extremely strong killing action.O
3Because poor stability can be decomposed into oxygen or single Sauerstoffatom voluntarily very soon, and single Sauerstoffatom can be combined into oxygen molecule voluntarily, does not have any poisonous residue, so, O
3It is a kind of free of contamination sterilizing agent.Ozonization is used in drinking water treatment as the alternative method of chlorine disinfectant more and more.
The ozone water soluble, the solubleness of ozone in water is higher about 13 times than oxygen at normal temperatures and pressures, and is higher 25 times than air.But the stability of ozone water solution receives in the water influence of impurities bigger, and when particularly having metals ion to exist, ozone can be decomposed into oxygen rapidly.In pure water, decompose slower.The ozone molecule structure is unsettled, and it decomposes in water than in air more easily voluntarily.Though the solubleness of ozone in water is bigger 10 times than oxygen, its solubleness is very little in practicality, because it observes Henry's law, dividing potential drop and stagnation pressure in its solubleness and the system are proportional.The aerial content of ozone is extremely low, so dividing potential drop is also extremely low, that will force ozone in water to be overflowed from the interface of water and air, makes ozone in water concentration always be in continuous reduction state.Therefore, developing the ozone with high concentration producer is the effective way that the ozone solution degree is improved.
Summary of the invention:
1, goal of the invention:
The objective of the invention is to cause effluent quality total residual chlorine amount to increase for solving traditional chlorine-containing disinfectant processing medical waste water; And traditional consistency of ozone water is crossed low water sterilization only suitable for drinking and the shortcoming of wastewater disinfection DeGrain, the method that a kind of medical waste water of proposition is disinfected fast.
2, technical scheme:
The present invention realizes through following technical scheme:
The method that a kind of medical waste water is disinfected fast is characterized in that:
O
2Molecule is through the dense ionization ozonizer, and electric power is processed into O
3, ozone O
3Concentration can reach 60 ~ 200g/m
3, O
3Medical waste water through with the pump suction converges at the Venturi ejector, and when mobile water was through the Venturi ejector fast, instantaneous cavitation became micro bubble.When bubble diameter is little when the certain size, micro bubble expands, is contracted to " blast " process rapidly, the moment before bubble collapses; Temperature and pressure sharply increases (T＞3000K in the bubble; P＞1000MPa), the causes water molecule is in excited state, and the concentration that produces radical is about 10
-9(V/V), the hydroxyl free base unit weight that excitation water itself produces is the less important mode that produces hydroxyl seldom.And the main path that produces the high density hydroxyl radical free radical is to adopt the ozone with high concentration of strong ionization discharge processing and the plasma chemical reaction of excited state water, thereby has realized that (with hydroxyl radical free radical is main to high density hydroxyl free based sols, also contains HO
2 -, OH
-Wait other radicals) preparation, wherein the mass-transfer efficiency of ozone has reached more than 98%, hydroxy free radical concentration can reach 3 ~ 8mg/L.The strong oxidizing property of hydroxyl radical free radical can be accomplished the oxidation deactivation to pathogenic micro-organisms such as the pathogen enterobacteria in the medical waste water, enteroviruses in 1 ~ 5s, it mainly is decomposed into CO
2And H
2O.
The plasma chemical reaction mode that the employing strong ionization discharge prepares the hydroxyl free based sols is following:
O
2?+?O
·→?O
3
O
3?+?e?→?O
3 ·－
O
3?→?O
·+?O
2
O
·+?H
2O?→?2?OH
·
O
3?+?H
2O?→?O
2?+?H
2O
2
H
2O
2 *?→?2?OH
·
H
2O
2 *?→?H
+?+?HO
2 －
H
2O
2 *?+?H
2O→?HO
2 －+?H
3O
+
O
3?+?HO
2 －?→?HO
2 ·+?O
3 ·－
HO
2 · 
H
+?+?O
2 ·－
HO
2 －+?O
3?→?O
2?+?O
2 ·－+?OH
·
O
2 ·－+?O
3?→?O
2?+?O
3 ·－
H
2O
2?+?O
2 ·－?→?O
2?+?OH
－+?OH
·
O
3?+?e?→?O
3 ·－
O
3 ·－+?H
+?→?HO
3 ·
HO
3 ·→?O
2?+?OH
·
O
2 ·－+?HO
3 ·→?2O
2?+?OH
·。
3, advantage and effect:
Beneficial effect of the present invention is following:
(1) raw material of processing oh soln is oxygen and medical waste water, and cost is low;
(2) pathogenic microorganism in the medical waste water and excrement colibacillus group are carried out inactivation ratio and reach 99.99%;
(3) disinfecting time is short, is merely 1 ~ 5s.
(4) after the germ deactivation, the main oxidized CO that is decomposed into
2And H
2O, non-secondary pollution, and further reduced the COD and the BOD of effluent quality.
Description of drawings:
Fig. 1 is a strong ionization discharge ozonizer principle assumption diagram of the present invention;
Fig. 2 is the synoptic diagram of the practical implementation step of the inventive method.
Description of reference numerals:
The medical waste water of 1, disinfecting in advance; 2, valve; 3, under meter; 4, pump; 5, Venturi ejector; 6, strong ionization discharge ozonizer; 7, gas-liquid separator; 8, ozone cancellation element; 9, water outlet; 10, high-frequency voltage unit; 11, high-frequency and high-voltage power supply; 12, high-voltage pulse transmitter; 13, high-voltage pulse current transmitter; 14, digital storage oscilloscope; 15, high-voltage table; 16, transport pipe; A, unstripped gas; B, novel substance; C, discharging gap; D, discharge electrode; E, earthing pole; F, dielectric medium.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done further explanation:
The method that a kind of medical waste water is disinfected fast, as shown in Figure 2, this method is carried out according to the following steps:
(1), with O
2Molecule under the control of power system, produces strong ionization discharge, with O through the strong ionization discharge ozonizer 6 shown in Fig. 1 and Fig. 2
2Be processed into high-concentrated ozone O
3, make its concentration reach 60～200g/ m
3
(2), will pass through in the medical waste water of disinfecting the in advance 1 suction Venturi ejector 5 of valve 2 and under meter 3 with pump 4; Contact with the ozone that produces in the step (1); The mass-transfer efficiency of ozone is greater than 98%, and generating ratio concentration is the hydroxyl free based sols of the strong oxidizing property of 3～8mg/L, with the pathogenic micro-organism generation oxidation deactivation reaction in the medical waste water; Reaction times is 1～5s; Get into gas-liquid separator 7 then residual ozone is separated, residual ozone is discharged after becoming oxygen through ozone cancellation element 8, and the medical waste water after above-mentioned disinfecting gets into and accomplishes the whole process of disinfecting in the water outlet 9.
Power system is by high-frequency voltage unit 10 in the step (1), high-frequency and high-voltage power supply 11, and high-voltage pulse transmitter 12, high-voltage pulse current transmitter 13, digital storage oscilloscope 14 constitutes with high-voltage table 15; High-frequency and high-voltage power supply 11 1 ends connect high-frequency voltage unit 10; The other end connects high-voltage pulse transmitter 12 and high-voltage pulse current transmitter 13 respectively; High-voltage pulse transmitter 12 all links to each other with digital storage oscilloscope 14 with high-voltage pulse current transmitter 13, also is connected with strong ionization discharge ozonizer 6 and high-voltage table 15 on the high-voltage pulse current transmitter 13 respectively.
Contact with the high-concentrated ozone mixing of generation in the step (1) at 5 li medical waste waters that are activated of the Venturi ejector described in the step (2).
The hydroxyl free based sols of the strong oxidizing property described in the step (2) and the reaction of the pathogenic micro-organism generation oxidation deactivation in the medical waste water are in the course of conveying of transport pipe 16, to accomplish, and the reaction times is 1～5s, and range ability is 5～10m.
The deactivation efficient of pathogenic micro-organism reaches 99.99% in the water outlet 9, can also further reduce the COD and the BOD of effluent quality.
Embodiment 1:
The method that a kind of medical waste water is disinfected fast, this method is carried out according to the following steps:
(1), with O
2Molecule under the control of power system, produces strong ionization discharge, with O through strong ionization discharge ozonizer 6
2Be processed into high-concentrated ozone O
3, make its concentration reach 60g/ m
3
(2), will pass through in the medical waste water of disinfecting the in advance 1 suction Venturi ejector 5 of under meter 3 with pump 4; Contact with the ozone that produces in the step (1), the mass-transfer efficiency of ozone is greater than 98%, and generating ratio concentration is the hydroxyl free based sols of the strong oxidizing property of 3mg/L; In transport pipe 16 with medical waste water in pathogenic micro-organism generation oxidation deactivation reaction; Reaction times is 5s, and range ability is 10m, gets into gas-liquid separator 7 then residual ozone is separated; Residual ozone is discharged after becoming oxygen through ozone cancellation element 8, and the medical waste water after above-mentioned disinfecting gets into and accomplishes the whole process of disinfecting in the water outlet 9.Pathogenic microorganism in the water outlet 9 and excrement colibacillus group inactivation ratio reach 99.99%.
Embodiment 2:
The method that a kind of medical waste water is disinfected fast, this method is carried out according to the following steps:
(1), with O
2Molecule under the control of power system, produces strong ionization discharge, with O through strong ionization discharge ozonizer 6
2Be processed into high-concentrated ozone O
3, make its concentration reach 200g/ m
3
(2), will pass through in the medical waste water of disinfecting the in advance 1 suction Venturi ejector 5 of under meter 3 with pump 4; Contact with the ozone that produces in the step (1), the mass-transfer efficiency of ozone is greater than 98%, and generating ratio concentration is the hydroxyl free based sols of the strong oxidizing property of 8mg/L; In transport pipe 16 with medical waste water in pathogenic micro-organism generation oxidation deactivation reaction; Reaction times is 1s, and range ability is 5m, gets into gas-liquid separator 7 then residual ozone is separated; Residual ozone is discharged after becoming oxygen through ozone cancellation element 8, and the medical waste water after above-mentioned disinfecting gets into and accomplishes the whole process of disinfecting in the water outlet 9.Pathogenic microorganism in the water outlet 9 and excrement colibacillus group inactivation ratio reach 99.99%.
Embodiment 3:
The method that a kind of medical waste water is disinfected fast, this method is carried out according to the following steps:
(1), with O
2Molecule under the control of power system, produces strong ionization discharge, with O through strong ionization discharge ozonizer 6
2Be processed into high-concentrated ozone O
3, make its concentration reach 100g/ m
3
(2), will pass through in the medical waste water of disinfecting the in advance 1 suction Venturi ejector 5 of under meter 3 with pump 4; Contact with the ozone that produces in the step (1), the mass-transfer efficiency of ozone is greater than 98%, and generating ratio concentration is the hydroxyl free based sols of the strong oxidizing property of 5mg/L; In transport pipe 16 with medical waste water in pathogenic micro-organism generation oxidation deactivation reaction; Reaction times is 3s, and range ability is 8m, gets into gas-liquid separator 7 then residual ozone is separated; Residual ozone is discharged after becoming oxygen through ozone cancellation element 8, and the medical waste water after above-mentioned disinfecting gets into and accomplishes the whole process of disinfecting in the water outlet 9.Pathogenic microorganism in the water outlet 9 and excrement colibacillus group inactivation ratio reach 99.99%.
The method that this medical waste water of the present invention is disinfected fast, the ozone mass-transfer efficiency is high, has avoided common disinfectants to handle the too high shortcoming of total residual chlorine behind the medical waste water; Effluent quality is high; Redundant ozone and oh soln moment decomposition do not cause secondary pollution, are suitable for applying.
Claims (4)
1. method that medical waste water is disinfected fast, it is characterized in that: this method is carried out according to the following steps:
(1), with O
2Molecule under the control of power system, produces strong ionization discharge, with O through strong ionization discharge ozonizer (6)
2Be processed into high-concentrated ozone O
3, make its concentration reach 60～200g/ m
3
(2), will pass through in the medical waste water of disinfecting in advance (1) the suction Venturi ejector (5) of valve (2) and under meter (3) with pump (4); Contact with the ozone that produces in the step (1); The mass-transfer efficiency of ozone is greater than 98%; Generating ratio concentration is the hydroxyl free based sols of the strong oxidizing property of 3～8mg/L; With the pathogenic micro-organism generation oxidation deactivation reaction in the medical waste water, the reaction times is 1～5s, gets into gas-liquid separator (7) then residual ozone is separated; Residual ozone gets into discharges after ozone cancellation element (8) becomes oxygen, and the medical waste water after above-mentioned disinfecting gets into and accomplishes the whole process of disinfecting in the water outlet (9).
2. the method for disinfecting fast according to a kind of medical waste water described in the claim 1; It is characterized in that: power system is by high-frequency voltage unit (10) in the step (1); High-frequency and high-voltage power supply (11); High-voltage pulse transmitter (12), high-voltage pulse current transmitter (13), digital storage oscilloscope (14) and high-voltage table (15) constitute; High-frequency and high-voltage power supply (11) one ends connect high-frequency voltage unit (10); The other end connects high-voltage pulse transmitter (12) and high-voltage pulse current transmitter (13) respectively; High-voltage pulse transmitter (12) all links to each other with digital storage oscilloscope (14) with high-voltage pulse current transmitter (13), also is connected with strong ionization discharge ozonizer (6) and high-voltage table (15) on the high-voltage pulse current transmitter (13) respectively.
3. the method for disinfecting fast according to a kind of medical waste water described in claim 1 or 2; It is characterized in that: the hydroxyl free based sols of the strong oxidizing property described in the step (2) and the reaction of the pathogenic micro-organism generation oxidation deactivation in the medical waste water; Be in the course of conveying of transport pipe (16), to accomplish in 1～5s, and range ability is 5～10m.
4. the method for disinfecting fast according to a kind of medical waste water described in claim 1 or 2 is characterized in that: the deactivation efficient of pathogenic micro-organism reaches 99.99% in the water outlet (9), can also further reduce the COD and the BOD of effluent quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571634A CN102060370B (en) | 2010-12-03 | 2010-12-03 | Method for rapid disinfection of medical wastewater |
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|---|---|---|---|
| CN201010571634A CN102060370B (en) | 2010-12-03 | 2010-12-03 | Method for rapid disinfection of medical wastewater |
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| CN102060370A CN102060370A (en) | 2011-05-18 |
| CN102060370B true CN102060370B (en) | 2012-09-26 |
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|---|---|---|---|---|
| CN104876375A (en) * | 2015-04-29 | 2015-09-02 | 刘毅 | Deep oxidization water treatment method and deep oxidization water treatment device |
| KR101814871B1 (en) * | 2015-08-31 | 2018-01-30 | 고려대학교 산학협력단 | A system for treating organic matter in rare earth compounds extracted waste water and a treating method using the same |
| CN107459190A (en) * | 2017-09-21 | 2017-12-12 | 北京工业大学 | A kind of advanced oxidation organic wastewater treating system and its efficacy test method |
| CN110574690A (en) * | 2019-10-18 | 2019-12-17 | 上海麦喀斯牧业机械有限公司 | A vortex type nipple flushing machine for milk cow sheep before milking |
| CN113428969B (en) * | 2021-06-03 | 2022-09-16 | 淮南联合大学 | Medical wastewater treatment device based on plasma discharge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986441A (en) * | 2006-10-25 | 2007-06-27 | 浙江工业大学 | Ozone and high voltage corona process and apparatus for treating high concentration orgnaic waste water |
| CN101585627A (en) * | 2008-05-20 | 2009-11-25 | 北京锦奥华荣科技有限公司 | Hydrolytic oxidization processing system for high-concentration medical waste water |
| CN101885556A (en) * | 2010-06-13 | 2010-11-17 | 四川大学 | Simple disinfection method for medicinal wastewater of hygiene hospital |
-
2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986441A (en) * | 2006-10-25 | 2007-06-27 | 浙江工业大学 | Ozone and high voltage corona process and apparatus for treating high concentration orgnaic waste water |
| CN101585627A (en) * | 2008-05-20 | 2009-11-25 | 北京锦奥华荣科技有限公司 | Hydrolytic oxidization processing system for high-concentration medical waste water |
| CN101885556A (en) * | 2010-06-13 | 2010-11-17 | 四川大学 | Simple disinfection method for medicinal wastewater of hygiene hospital |
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