CN1552633A - Running water ultraviolet technology pretreatment method - Google Patents
Running water ultraviolet technology pretreatment method Download PDFInfo
- Publication number
- CN1552633A CN1552633A CNA031238971A CN03123897A CN1552633A CN 1552633 A CN1552633 A CN 1552633A CN A031238971 A CNA031238971 A CN A031238971A CN 03123897 A CN03123897 A CN 03123897A CN 1552633 A CN1552633 A CN 1552633A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet
- water
- sterilization
- tap water
- algae
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
A process for pretreating the running water by UV technique features that a Trojan UV SWIFT ultraviolet disinfecting system is installed to the pipeline between pump and flocculation pool, and after the oxidant is added to the running water to lower its turbidity, the water flows through said ultraviolet disinfecting system to kill bacteria in water.
Description
Technical field the present invention relates to sterilization, the purification techniques of tap water, especially uses the ultraviolet-sterilization technology tap water is carried out pretreated method.
Background technology in recent years, countries in the world environmental protection cry grows to even greater heights, environmental legislation is gradually improved, traditional tap water treatment technology just progressively is restricted, how active development and use the inexorable trend that tap water treatment technology pollution-free, environment-friendly type has become Environmental Science and Engineering subject innovation from now on and development.
The tap water water source also can make whole water factory and pipe network produce and pollute, even go back the entail dangers to human beings'health because objectionable impuritiess such as the microorganism that wherein exists, algae, red worm to a certain extent, not only can influence the last handling process of water factory.For the better stability that guarantees the waterworks operation, at present, the mode that adopts usually is that tap water is carried out pre-treatment both at home and abroad, and its method roughly has following several:
(1) preceding chlorination: this is to use the earliest and most popular method, it has sterilization, desinsection, the effect of killing algae and stronger oxygenizement, but, the prechlorination processing can produce the halo organic pollutant that in a large number human body is had " three cause " effect, and the destructive biomass cells more dissolved organic matter matter that can run off, and these materials can not be removed by conventional drinking water treatment technology substantially.
(2) ozone oxidation method: this also is the sterilizing method that is adopted usually, the many inorganic and organic substances of energy oxidation, algae and multiple pathogenic microbes etc. is had good inactivating efficacy, can be used to tap water is carried out pre-treatment, but its shortcoming is: facility investment is big, the power consumption expense is also high, and ozone is unstable, volatile in water, the equipment complexity, management inconvenience, cost is higher.
(3) potassium permanganate oxidation method: potassium permanganate is as strong oxidizer, degradation of organic substances, suppress algal grown, along with the increase of dosage and the prolongation of duration of contact, effect is also more satisfactory, and can form in hydrolytic process and have strong oxidation capacity and the big intermediate product of surface-area---nascent state hydrated manganese dioxide flco.The characteristics of this flco are not only can bring into play oxygenizement, also have adsorption, can remove foreign odor and partial organic substances in the water effectively, and algae is also had removal effect, but its shortcoming is: the cost height has by product.
(4) hydrogen peroxide oxidation process: hydrogen peroxide can produce hydroxyl radical free radical under certain conditions, its redox potential is 2.85 volts, has very strong oxidation capacity, organism for the overwhelming majority all has decomposability efficiently, particularly there is the high agricultural chemicals of persistency organic contaminant to bring into play its oxidation capacity for those, its original advantage is arranged, but that its shortcoming is a cost is too high.
(5) dioxide peroxide oxidation style: this also be China present stage in the disinfection of tap water field one of method for disinfection the most widely, the organism in dioxide peroxide and the water body optionally acts on, can the oxidation unsaturated link(age) and the side chain of aromatic compound.Can avoid forming the chlorophenol stink for the water that is subjected to phenolic compounds pollution with chlorine dioxide treatment.In addition, dioxide peroxide also has the good algae effect of removing, meta-bolites that can the oxidation algae.But dioxide peroxide easily sets off an explosion, and can not store, necessary now-making-now-using, and reparation technology complexity, and operational administrative requires high, and cost is also higher.
The research that ultraviolet-sterilization is applied to the water technology aspect has had for a long time, is characterized in the disinfection efficiency height, effectively morbific virus, bacterium and protozoon in the deactivation water body, and can not produce by product, be a kind of environment-friendly type water treatment technology., do not applied widely in China for a long time because its technical difficulty is big.
Under the uv irradiating, photochemistry can take place for DNA in the water body in various viruses and bacterium and other pathogen or RNA structure destroys, and the destruction of nucleic acid has been disturbed normal cellular activity, for example protein synthesis and cell fission.Owing to can not duplicate again by the pathogenic agent of ultraviolet radiation, just lost the ability of opposing host immune system, finally these pathogenic agent can be dead or be killed by host's immunity system, reach the purpose of pathogen in the removal water.
Though the application of ultraviolet-sterilization technology aspect water treatment is quite extensive, its research that is used in tap water pre-treatment aspect be yet there are no relevant report both at home and abroad.How to develop a kind of efficient, low toxicity, less energy-consumption, do not cause the water technology of secondary pollution to become the focus and the direction of water technology research from now on.
Summary of the invention is in order to accelerate the greenization process of water technology, solve the little pollution problems of tap water, break away from the secondary pollution that existing method is caused simultaneously, the restriction that cost is high excessively, the present invention discloses a kind of novel tap water pretreatment process on the basis of existing technology, promptly adopt ultraviolet-sterilization and oxygenant bonded method for disinfection that tap water is carried out pre-treatment, this kind method not only sterilization is complete, gather and imitate soon, sterilization kind scope is wide, add any chemical agent in the water but also not be used in, avoiding producing secondary pollution, is a kind of " green ", tap water preconditioning technique efficiently.
This ultraviolet-sterilization tap water pretreatment technology of the present invention, the disinfection system that it adopted is a Trojan UV SWIFT ultraviolet system, this system has adopted the PLC Controlling System, the design of computer fluid simulation, automatic cleaning system is arranged, the ultraviolet light intensity transmitter, electric ballast and housing are the ultraviolet water treatment systems that possesses multiple processing power.When the source water from the beginning of the water intaking pump of flowing through enters the ultraviolet-sterilization system, organism in the water quality, microorganism and unwanted bacteria are under the radiation of UV-light, and its cellularstructure is damaged, and the part organic composition is by catalyzed degradation, thereby finish sterilization and disinfection, reach pretreated purpose.
When taking this ultraviolet system to carry out the pre-treatment of tap water, at first, the amount at the water source of handling according to need from the beginning determines use the Trojan UV SWIFT ultraviolet system of which kind of type, it is installed on the pipeline between waterworks pump house and the flocculation sedimentation tank again.
Then, the COD of the tap water of handling as required
CrBe worth and the turbidity situation, determine to add the consumption and the kind of oxygenant, concrete consumption standard is to make settling tank water outlet COD
CrCan reach drinking water standard.Specifically, if water turbidity can be chosen in and add oxygenant before water enters the ultraviolet device more than 8 degree, the kind of oxygenant can be selected from ozone, dioxide peroxide, hydrogen peroxide, liquid chlorine etc.
At last, the current of water source from the beginning that need are handled are through the ultraviolet-sterilization system, at the ultraviolet light wave wavelength are between 100nm～310nm, uv dosage is 30～200mws/cm
2The time, make from the beginning the source water ultraviolet-sterilization system that flows through uniformly, finish sterilization, and then enter the flocculation sedimentation tank treatment process.
If the water turbidity of source water can add oxygenant at its front end when water enters the ultraviolet system when 8 degree are above from the beginning.Behind ultraviolet system operation certain hour, according to the size of uv dosage, start washing unit automatically, make ultraviolet lamp keep cleaning for a long time as before, concrete clear Xian's frequency is decided because of the water quality situation.
Compare with existing tap water preconditioning technique, the present invention has following clear superiority:
(1) efficient: the ultraviolet treatment process can 100% be killed common bacteria, virus, and the time generally within the several seconds, killing generally within 1 minute especially to algae.
(2) wide spectrum: in present all known disinfection technologies, ultraviolet technology is a wide spectrum the most, and it can kill all bacteriums, virus, mould, algae, parasite etc.
(3) safety: ultraviolet technology is a kind of optical radiation effect, does not only add any chemical agent in water, can also decompose some harmful organic substances on the contrary, thereby can not produce any secondary pollution to water body and surrounding environment.
(4) simple economy: ultraviolet-sterilization technical operation and safeguard relatively simple and stable, be subjected to the influence of ambient environmental conditions and condition of water quality little, and running cost is low, take up an area of fewly, noise is little; Fixed investment mainly is a ultraviolet equipment, and running cost is low, the cost performance height.
Appended drawings is the pretreated process flow sheet of tap water ultraviolet technology of the present invention
Wherein, 1. source water 2. thief holes 3. pumps 4. oxygenants add mouthful 5.Trojan UVMAX-E ultraviolet system 6. power supplys, 7. steel basins.
The invention will be further described below in conjunction with embodiment and accompanying drawing for embodiment:
Embodiment 1:
Two different source waters of water turbidity are carried out sterilization and disinfection to be handled: wherein, the turbidity of water source (2) is greater than the turbidity of water source (1), and its turbidity is more than 8 degree.Former current enter the UVMAX-E ultraviolet equipment of Trojan through pump, enter the ZR3-6 steel basin behind uv-radiation.The ultraviolet output wavelength is 254nm, and UV intensity is got 10.6mW/cm
2, cavity volume is 2.983L.Measure alga-killing rate, the sterilizing rate of handling back water quality,, find on sterilization effect, to be better than the water body of prechlorination far away through the water body behind the uv sterilisation with the effect comparison of prechlorination
Result is analyzed:
1), water source (1) the amount of algae order of magnitude is 10
7About, preceding chlorination is 1.5mg/l, analyzes its result to be:
Table 1: the clearance of water source (1) algae
| Uv dosage (mJ/cm 2) | Test former water | Preceding chlorinated water | ??31.04 | ??62.08 | ?186.24 | ?372.48 |
| Amount of algae (* 10 6) | ??11.7 | ??8.44 | ??11.3 | ??11.0 | ?6.58 | ?6.8 |
| Ultraviolet algae removal rate before the coagulation | ??55.34％ | ??3.40％ | ??6.00％ | ?43.80％ | ?41.90％ | |
| Algae (* 10 behind the coagulation 5) | ??7.95 | ??6.95 | ??3.11 | ??2.59 | ?8.77 | ?3.65 |
| The total clearance of algae | ??96.32％ | ??97.30％ | ??97.80％ | ?92.50％ | ?96.90％ |
Measure and adopt black and white bottle method, can find out that from table 1 uv dosage only needs 62.08mj/cm
2Just can reach the alga-killing rate of chlorination before being better than.
2), water source (2) water turbidity COD is high slightly, the amount of algae level is 10
7More than, the production chlorination is 3.0mg/l, analyzes its sterilization rate result to be:
Table 2: water source (2) algae removal rate
| Uv dosage (mJ/cm 2) | Produce former water | The preceding former water of chlorination | The former water of lab scale | ??31.04 | ?93.12 | 186.24 |
| Amount of algae (10 7Individual/L) | ????1.86 | ??1.59 | ??2.09 | ??1.87 | ?1.53 | 1.27 |
| Ultraviolet algae removal rate (%) before the coagulation | ??14.52 | ??10.53 | ?26.79 | 39.23 | ||
| Algae (10 behind the coagulation 6Individual/L) | ????5.15 | ??2.36 | ??2.55 | ??2.41 | ?2.63 | 2.69 |
| Algae removal rate (%) (always) | ??87.31 | ??88.47 | ?87.42 | 87.13 | ||
| Total plate count | ????380 | ??65 | ?9 | 7 | ||
| Sterilizing rate | ??82.9％ | ?97.6％ | 98.2％ |
As shown in Table 2, the relative higher water source of Lai Shui again of water turbidity, preceding chlorine dosage need double, but uv dosage only need improve half.
Embodiment 2:
Independent ultraviolet-sterilization is handled and can not be made the oxidation operation oxidation thorough fully, and does not have extending function at the subsequent technique middle-ultraviolet lamp, therefore, considers the ultraviolet processing is improved treatment effect with the coupling of other technologies method.Adopt ultraviolet pre-treatment and H
2O
2Symphyogenetic mode is to the pre-treatment of carrying out of tap water, and its technology is the same, and various qualification parameter is identical.
1), adopts ultraviolet+H
2O
2Handle the result at water source (1)
| Former water | 8mg/LH 2O 2 | ?8mg/LH 2O 2+ ultraviolet | 4mg/LH 2O 2 | ?4mg/LH 2O 2+ ultraviolet | |
| Turbidity before the coagulation | ??3.75 | ????3.86 | ????3.9 | ????4.07 | ????3.96 |
| Algae (10 before the coagulation 6Individual/L) | ??13.1 | ????10.6 | ????9.04 | ????10.1 | ????9.27 |
| Turbidity behind the coagulation | ??1.41 | ????1.64 | ????1.14 | ????1.21 | ????1.5 |
| Algae (10 behind the coagulation 6Individual/L) | ??4.63 | ????2.61 | ????1.86 | ????2.83 | ????1.62 |
| Turbidity reduced rate (%) before and after the coagulation | ????56.3 | ????69.6 | ????67.9 | ????60 | |
| Algae removal rate (%) before the coagulation | ????19.08 | ????30.99 | ????22.90 | ????29.24 | |
| Algae removal rate (%) before and after the coagulation | ??64.66 | ????75.38 | ????79.42 | ????71.98 | ????82.52 |
As seen from table, H
2O
2, ultraviolet+H
2O
2Combination treatment all has good effect to the algae that removes of improving follow-up coagulating sedimentation with the reduction turbidity.
2), adopt ultraviolet+H
2O
2Handle the result at water source (2)
| Former water | 8mg/LH 2O 2 | ?8mg/LH 2O 2+ ultraviolet | ?4mg/LH 2O 2 | ?4mg/LH 2O 2+ ultraviolet | |
| Turbidity before the coagulation | ??1.78 | ??2.12 | ????2.11 | ??2.07 | ????1.84 |
| Algae (10 before the coagulation 6Individual/L) | ??24.5 | ??28.5 | ????23.3 | ??18.5 | ????22.9 |
| Turbidity behind the coagulation | ??0.84 | ??0.97 | ????0.84 | ??0.99 | ????0.95 |
| Algae (10 behind the coagulation 6Individual/L) | ??7.07 | ??3.56 | ????3.00 | ??4.31 | ????3.34 |
| Turbidity reduced rate (%) before and after the coagulation | ??45.5 | ????52.8 | ??44.4 | ????46.6 | |
| Algae removal rate (%) before the coagulation | ??-16.3 | ????4.9 | ??24.5 | ????6.5 | |
| Algae removal rate (%) before and after the coagulation | ??71.1 | ??85.5 | ????87.8 | ??82.4 | ????86.4 |
Embodiment 3:
Employing is observed by the midge inactivation ratio behind the ultraviolet equipment, thereby is drawn ultraviolet equipment in the influence of tap water pre-treatment to some biologies by adding midge.
| Time | 16/7/2002 | 26/7/2002 | ||
| Add material | 350 of IV instar larvaes, 500 on pieces of an egg | 100 of IV instar larvaes, I, II, III instar larvae are some, 10 on pieces of an egg | ||
| The adding method | Directly add clean water basin water outlet place with flexible pipe | Water pump rear hose place adds | ||
| Water flow velocity | 100ml/s | 100ml/s, 150ml/s, 300ml/s | ||
| Radiated time | 30s | 10s, 20s, 30s | ||
| The result | Before the radiation | Polypide is all ruptured, and does not have the worm of living.Pieces of an egg all break, and ovum grain hatching rate after cultivating is 47% | 100ml/s | 4 cestodes are arranged, 3 work, the worm that lives is still very active after 2 days.I, II, III instar larvae are normal |
| 150ml/s | 3 cestodes, 2 work, the worm that lives is dead after 5 hours.I, II, III instar larvae are normal | |||
| 300ml/s | 5 cestodes, 2 work, the worm that lives is dead after 5 hours.I, II, III instar larvae are normal | |||
| After the radiation | Polypide is ruptured mostly, and body colour is turned white, and finds 1 worm alive, but body colour shoals and death after 2 hours.Pieces of an egg all break, and the ovum grain is all not hatchings after cultivating | 100ml/s | I, II instar larvae are all dead.26 of IV instar larvaes, the polypide look shoals and turns white, 8 of worms wherein alive, but dead after 24 hours.Cultivate and do not see the ovum that hatching is arranged. | |
| 150ml/s | 16 of IV instar larvaes, 5 of worms alive, remaining is the same. | |||
| 300ml/s | 7 of IV instar larvaes, 1 of worm alive, remaining is the same. | |||
Can draw from above test-results:
1) radiation is 30 seconds, and ovum promptly can not be hatched.
2) radiation 10-30 second, I, II instar larvae are all dead.
3) radiation is 10,20,30 seconds, and the mortality ratio of IV instar larvae is respectively 61.5%, 72.6%, 85.7%, so the flow velocity of water is that the mortality ratio of the long more IV instar larvae of radiated time is high more more slowly.
Claims (4)
1, a kind of tap water ultraviolet technology pretreatment process, it is characterized in that: Trojan UV SWIFT ultraviolet-sterilization system is installed on the pipeline between waterworks pump house and the flocculation basin, when current enter the ultraviolet system, at the ultraviolet light wave wavelength be between 100nm～310nm, uv dosage is 30～200mws/cm
2The time, make from the beginning source water finish ultraviolet-sterilization; If at 8 degree when above, can being chosen in current, the turbidity of water quality adds oxygenant when entering the ultraviolet system; And then allow sterilization water later enter the flocculation sedimentation tank treatment process.
2, tap water ultraviolet technology pretreatment process according to claim 1, it is characterized in that: the oxygenant of required interpolation can be selected from: ozone, hydrogen peroxide, potassium permanganate, dioxide peroxide and liquid chlorine.
3, tap water ultraviolet technology pretreatment process according to claim 1 and 2, it is characterized in that: the dosage of required interpolation oxygenant can be at 2～8mg/l.
4, tap water ultraviolet technology pretreatment process according to claim 1 is characterized in that: there is the multiple water treatment capacity that varies in size in the Trojan UV SWIFT ultraviolet-sterilization system of being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031238971A CN1552633A (en) | 2003-05-26 | 2003-05-26 | Running water ultraviolet technology pretreatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031238971A CN1552633A (en) | 2003-05-26 | 2003-05-26 | Running water ultraviolet technology pretreatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1552633A true CN1552633A (en) | 2004-12-08 |
Family
ID=34321499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031238971A Pending CN1552633A (en) | 2003-05-26 | 2003-05-26 | Running water ultraviolet technology pretreatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1552633A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313389C (en) * | 2004-12-30 | 2007-05-02 | 金增鲁 | Technology for purifying life waste water for generation and reusing |
| CN100340166C (en) * | 2005-07-01 | 2007-10-03 | 哈尔滨工业大学 | Method for killing chironomus larvas by ultraviolet light |
| CN102491448A (en) * | 2011-12-09 | 2012-06-13 | 哈尔滨工业大学深圳研究生院 | Ultraviolet disinfection method and device against enteroviruses in drinking water |
| CN104961209A (en) * | 2015-07-10 | 2015-10-07 | 江苏鸿佑环保有限公司 | Efficient chloride-free disinfection system for waste water |
| CN105948342A (en) * | 2016-05-20 | 2016-09-21 | 中金辐照武汉有限公司 | Method using ultrasonic-high energy electronic ray-ultraviolet combined irradiation to sterilize water |
| CN108358274A (en) * | 2018-03-16 | 2018-08-03 | 中山大学 | A kind of method of micropollutants in removal water body |
| CN111087036A (en) * | 2019-12-27 | 2020-05-01 | 湖南大学 | Method for synchronously removing chlorite and emerging organic micropollutants in water by using ultraviolet light |
| CN113607718A (en) * | 2021-08-05 | 2021-11-05 | 山东省科学院海洋仪器仪表研究所 | Device and method for collecting seawater flash signal |
| US11390539B2 (en) | 2015-12-23 | 2022-07-19 | Novolabs Limited | Liquid treatment method and apparatus |
-
2003
- 2003-05-26 CN CNA031238971A patent/CN1552633A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313389C (en) * | 2004-12-30 | 2007-05-02 | 金增鲁 | Technology for purifying life waste water for generation and reusing |
| CN100340166C (en) * | 2005-07-01 | 2007-10-03 | 哈尔滨工业大学 | Method for killing chironomus larvas by ultraviolet light |
| CN102491448A (en) * | 2011-12-09 | 2012-06-13 | 哈尔滨工业大学深圳研究生院 | Ultraviolet disinfection method and device against enteroviruses in drinking water |
| CN104961209A (en) * | 2015-07-10 | 2015-10-07 | 江苏鸿佑环保有限公司 | Efficient chloride-free disinfection system for waste water |
| US11390539B2 (en) | 2015-12-23 | 2022-07-19 | Novolabs Limited | Liquid treatment method and apparatus |
| CN105948342A (en) * | 2016-05-20 | 2016-09-21 | 中金辐照武汉有限公司 | Method using ultrasonic-high energy electronic ray-ultraviolet combined irradiation to sterilize water |
| CN108358274A (en) * | 2018-03-16 | 2018-08-03 | 中山大学 | A kind of method of micropollutants in removal water body |
| CN111087036A (en) * | 2019-12-27 | 2020-05-01 | 湖南大学 | Method for synchronously removing chlorite and emerging organic micropollutants in water by using ultraviolet light |
| CN113607718A (en) * | 2021-08-05 | 2021-11-05 | 山东省科学院海洋仪器仪表研究所 | Device and method for collecting seawater flash signal |
| CN113607718B (en) * | 2021-08-05 | 2023-12-08 | 山东省科学院海洋仪器仪表研究所 | Device and method for collecting sea water flash signals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mane et al. | A novel hybrid cavitation process for enhancing and altering rate of disinfection by use of natural oils derived from plants | |
| CN101372369A (en) | Ultraviolet catalytic sterilization and chlorination combined disinfection method for water | |
| CN109002688B (en) | Water treatment method based on ozone disinfection/ultraviolet disinfection/chlorine disinfection | |
| CN101182085A (en) | Ultraviolet-chlorination agent sequentially disinfecting technology for reclaimed water | |
| CN101318728A (en) | Ultraviolet light catalysis disinfection method by chlorine dioxide for water | |
| CN203890204U (en) | Comprehensive treatment system of medical wastewater | |
| CN101607771A (en) | Multi-source ultraviolet light catalyzed chlorine disinfection method for drinking water | |
| CN1552633A (en) | Running water ultraviolet technology pretreatment method | |
| CN103523992A (en) | Slaughter wastewater processing system | |
| CN111233224A (en) | Treatment method for simultaneously removing nitrogen, phosphorus and antibiotics in mariculture wastewater and sterilizing | |
| Yin et al. | Technologies for bHRPs and risk control | |
| CN106348527A (en) | Hospital wastewater treatment process | |
| CN208802946U (en) | A kind of compound ultraviolet sterilization sterilizing unit | |
| RU2235688C2 (en) | Water photodisinfecting method | |
| CN1188353C (en) | Diffusionless full-sealed hospital sewage treating system | |
| CN101058456A (en) | Method of enhancing organism treatment industrial sewage by employing complex enzyme biological accelerant | |
| CN210915728U (en) | Domestic sewage treatment equipment | |
| CN105271617A (en) | Internal consumption type antibiotic wastewater treatment process system | |
| US20230002258A1 (en) | Systems and methods for oxidizing disinfectants combined with moving bed biofilm reactors | |
| CN111320296A (en) | Low-cost emulsion purifies regeneration system | |
| CN204981476U (en) | Novel medical treatment effluent disposal system | |
| CN221254289U (en) | Multi-level wastewater treatment device | |
| CN100384751C (en) | Method for treating wastewater of azo dye | |
| CN216337167U (en) | Medical wastewater treatment integrated system | |
| CN220432571U (en) | Grind washing waste water treatment recycling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |