CN103055804A - Compound water treatment agent as well as preparation method and application thereof - Google Patents
Compound water treatment agent as well as preparation method and application thereof Download PDFInfo
- Publication number
- CN103055804A CN103055804A CN2013100177030A CN201310017703A CN103055804A CN 103055804 A CN103055804 A CN 103055804A CN 2013100177030 A CN2013100177030 A CN 2013100177030A CN 201310017703 A CN201310017703 A CN 201310017703A CN 103055804 A CN103055804 A CN 103055804A
- Authority
- CN
- China
- Prior art keywords
- parts
- disposal agent
- composite water
- water disposal
- hydroxyapatite
- 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.)
- Granted
Links
Abstract
The invention provides a compound water treatment agent which is prepared from the following components in parts by weight: 0.1-5 parts of hydroxyapatite, 40-65 parts of natural zeolite, 1-10 parts of quartz, 1-10 parts of albite, 1-10 parts of illite, 10-40 parts of attapulgite and 0.1-5 parts of sepiolite. The invention further provides a preparation method and an application of the compound water treatment agent. The compound water treatment agent provided by the invention has the advantages of low cost, large specific surface area, high activity, high dispersity and high treatment efficiency.
Description
Technical field
The invention belongs to water treatment field, particularly a kind of composite water disposal agent also relates to preparation method and the application of this composite water disposal agent.
Background technology
Current, water pollution problems has become one of main problem of China's urban environment.Whole nation river waters and lake generally are subject to pollution in various degree, and especially middle and lower reaches section in big and medium-sized cities is polluted more serious.Urban river is the important component part of China's water environment, because the discharging of people's industry waste water and city domestic sewage, the city rivers pollution situation is quite serious, and the ubiquity eutrophication problem.According to statistics, to early in the twentieth century, almost do not had in the world a complete natural river, the heavy damage of urban river and degeneration have been acknowledged as a global ecological environment problem.This shows that the reparation of water environment becomes the important content of China environmental protection.
Yet, the improvement difficult of municipal pollution water body, the improvement quantities is large, involves a wide range of knowledge.The existing main pollution control technology of municipal pollution water body has Physical, chemical method, bioanalysis etc.Physical is often cured the symptoms, not the disease, and all there is the shortcoming that has high input in watercourse aeration technology, Sediment Dredging technology etc., and do not have the ability of scale pollution treatment, and the final processing of the polluted bed mud that is eliminated in the Sediment Dredging also is a very stubborn problem; Chemical method mainly is to adopt various chemical agents, kills algae as adding chemical agent, adds the precipitation (the solid phosphorus of chemistry) of the promotion phosphorus such as molysite etc., though chemical method can make water quality temporarily improve, can cause secondary pollution; Bioanalysis is a kind of main body recovery technique with good development prospect, and control expense is low, and environment is without impact, pollution degradation to greatest extent, but have the difficult points such as screening, microbial growth control of high efficient strain, so that the bioanalysis recovery technique is difficult to promote.Therefore, in conjunction with the characteristics of urban water-body, be conceived to the reparation to water ecosystem and self-purification capacity, seeking a kind of novel sewage treatment agent with low cost, efficient becomes current major subjects.
Summary of the invention
Goal of the invention: the first purpose of the present invention provides the composite water disposal agent that a kind of cost is low, efficient is high.
The second purpose of the present invention provides the preparation method of this composite water disposal agent.
The 3rd purpose of the present invention provides the application of this composite water disposal agent.
Technical scheme: a kind of composite water disposal agent provided by the invention, made by the component of following weight portion: hydroxyapatite 0.1-5 part, natural zeolite 40-65 part, quartzy 1-10 part, albite 1-10 part, illite 1-10 part, attapulgite 10-40 part, sepiolite 0.1-5 part.
As preferably, made by the component of following weight portion: hydroxyapatite 2-4 part, natural zeolite 45-55 part, quartzy 4-6 part, albite 4-6 part, illite 4-6 part, attapulgite 20-30 part, sepiolite 2-4 part.
As further preferred, made by the component of following weight portion: 3 parts of hydroxyapatites, 50 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
As further preferred, made by the component of following weight portion: 1 part of hydroxyapatite, 55 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
Preferred as another kind, the particle diameter of described composite water disposal agent is 0.01-10 μ m.
The present invention also provides a kind of preparation method of composite water disposal agent, with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after the 250-350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
The present invention also provides the application of composite water disposal agent in processing waste water, is specially: composite water disposal agent is added in the waste water, and constant temperature stirs, and filters after the sedimentation namely to get and processes rear water.
As preferably, the amount ratio of composite water disposal agent and waste water is (0.1-20) g:1L.
As further preferred, whipping temp is 20-30 ℃, and mixing time is 0.5-2h, and the sedimentation time is 20-30min.
Beneficial effect: composite water disposal agent provided by the invention is with low cost, specific area large, activity is high, dispersiveness is high, treatment effeciency is high, and it has following outstanding advantage with respect to prior art:
1. the raw material of composite water disposal agent of the present invention is natural sediment, and reserves are abundant, wide material sources, and cheap, operation cost is low, and easily regeneration can effectively reduce cost of water treatment; Environmentally safe can not cause secondary pollution yet simultaneously, and the composite water disposal agent of preparation is a kind of environmental friendliness shaped material.
2. composite water disposal agent of the present invention takes full advantage of the each component characteristic, such as zeolite and illitic adsorptivity and ion exchangeable, the adsorptivity of sepiolite, ion exchangeable and decolourising property etc.; Working in coordination of each component makes composite water disposal agent not only have simple suction-operated when processing simultaneously, also there are simultaneously skin effect, duct effect, structure effect, ion-exchange effect, crystallization effect, solubility effect, hydration effect and redox effect etc., each component is worked in coordination, Synergistic, nitrogen in effective removal waste water, phosphorus, heavy metal, organic dyestuff etc., than single nonmetallic mineral pollutants removal rate is improved 30-50% under the same terms, and remove pollutant speed and be exceedingly fast, it is short to reach the stable state time.
3. adopt ultrafine grinding process among the preparation method of composite water disposal agent of the present invention, make the size of prepared composite water disposal agent reach nanoscale, thereby make this composite water disposal agent possess the general character of nano material, have high specific area, high activity and polymolecularity.
Composite water disposal agent of the present invention treatment process when being applied to process waste water simple, have higher chemism and a biological stability, have wide range of applications, process the object diversification, can be used for the improvement of city polluted water body, also can be used for various engineering of water treatment projects, such as river course, sanitary sewage, soil remediation, industrial wastewater, dyeing waste water, paper waste processing, electroplating wastewater etc., have a extensive future.
The specific embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described concrete material proportion of embodiment, process conditions and result thereof only are used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Embodiment 1
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 5 parts of hydroxyapatites, 65 parts of natural zeolites, 10 parts in quartz, 10 parts of albites, 10 parts of illites, 40 parts of attapulgites, 5 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 2
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 0.1 part of hydroxyapatite, 40 parts of natural zeolites, 1 part in quartz, 1 part of albite, 1 part of illite, 10 parts of attapulgites, 0.1 part of sepiolite.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 250 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 3
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 2 parts of hydroxyapatites, 45 parts of natural zeolites, 4 parts in quartz, 6 parts of albites, 6 parts of illites, 30 parts of attapulgites, 4 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 4
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 2 parts of hydroxyapatites, 55 parts of natural zeolites, 6 parts in quartz, 4 parts of albites, 4 parts of illites, 20 parts of attapulgites, 2 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 5
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 3 parts of hydroxyapatites, 50 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 6
Composite water disposal agent, particle diameter are 0.01-10 μ m, are made by the component of following weight portion: 1 part of hydroxyapatite, 55 parts of natural zeolites, 5 parts in quartz, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
Its preparation method may further comprise the steps: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after 300 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
Embodiment 7
The composite water disposal agent that embodiment 1 to 6 makes is processed waste water, may further comprise the steps: composite water disposal agent is added in the waste water, and 140r/min constant temperature stirs, water after 0.45 μ m membrane filtration namely gets and processes after the sedimentation.
Measure the pollutant levels of processing in the solution of front and back according to national standard method, calculate clearance, and carry out the check experiment of single nonmetallic ore under equal experimental condition, detection method is as follows:
TN:GB11894-89
TP:GB11893-89
BOD
5:GB7488-87
COD:GB11914-89
Cd
2+Pb
2+Zn
2+Cu
2+:GB7475-87
Cr
6+:GB7467-87,
Hg:GB7468-87
Turbidity: GB13200-91
Colourity: GB11903-89
Treatment conditions see Table 1, and treatment effect sees Table 2.
The composite water disposal agent that table 1 embodiment 1 to 6 makes is processed the waste water condition
The composite water disposal agent that table 2 embodiment 1 to 6 makes is processed the waste water effect
Can find out that by table 1 and table 2 composite water disposal agent of the present invention improves than zeolite greatly to the treatment effect of the various pollutants in the waste water.
Claims (9)
1. composite water disposal agent, it is characterized in that: the component by following weight portion is made: hydroxyapatite 0.1-5 part, natural zeolite 40-65 part, quartzy 1-10 part, albite 1-10 part, illite 1-10 part, attapulgite 10-40 part, sepiolite 0.1-5 part.
2. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: hydroxyapatite 2-4 part, natural zeolite 45-55 part, quartzy 4-6 part, albite 4-6 part, illite 4-6 part, attapulgite 20-30 part, sepiolite 2-4 part.
3. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: 3 parts of hydroxyapatites, 50 parts of natural zeolites, quartzy 5 parts, 5 parts of albites, 5 parts of illites, 25 parts of attapulgites, 2.5 parts of sepiolites.
4. a kind of composite water disposal agent according to claim 1, it is characterized in that: the component by following weight portion is made: 1 part of hydroxyapatite, 55 parts of natural zeolites, quartzy 5 parts, 5 parts of albites, 5 parts of illites, 28 parts of attapulgites, 2 parts of sepiolites.
5. a kind of composite water disposal agent according to claim 1, it is characterized in that: the particle diameter of described composite water disposal agent is 0.01-10 μ m.
6. the preparation method of a composite water disposal agent, it is characterized in that: with hydroxyapatite, natural zeolite, quartz, albite, illite, attapulgite and sepiolite mixing, after the 250-350 ℃ of activation process, ultra-fine grinding to particle diameter is 0.01-10 μ m, and get final product.
7. the application of composite water disposal agent in processing waste water is characterized in that: composite water disposal agent is added in the waste water, and constant temperature stirs, and filters after the sedimentation namely to get and processes rear water.
8. application claimed in claim 7 is characterized in that: the amount ratio of composite water disposal agent and waste water is (0.1-20) g:1L.
9. application claimed in claim 7 is characterized in that: whipping temp is 20-30 ℃, and mixing time is 0.5-2h, and the sedimentation time is 20-30min.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310017703.0A CN103055804B (en) | 2013-01-17 | 2013-01-17 | Compound water treatment agent as well as preparation method and application thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310017703.0A CN103055804B (en) | 2013-01-17 | 2013-01-17 | Compound water treatment agent as well as preparation method and application thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN103055804A true CN103055804A (en) | 2013-04-24 |
CN103055804B CN103055804B (en) | 2015-02-04 |
Family
ID=48098872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201310017703.0A Active CN103055804B (en) | 2013-01-17 | 2013-01-17 | Compound water treatment agent as well as preparation method and application thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103055804B (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103708593A (en) * | 2013-12-26 | 2014-04-09 | 张�成 | Dyeing wastewater treatment agent and preparation method thereof |
CN104276670A (en) * | 2014-09-30 | 2015-01-14 | 希望环保(福建)有限公司 | Sewage treating agent containing natural mineral substances and preparation method thereof |
CN104845910A (en) * | 2015-05-13 | 2015-08-19 | 河海大学 | Biochemical reagent and preparation method and application thereof |
CN105060374A (en) * | 2015-09-28 | 2015-11-18 | 宁波高新区巴艺新材料科技有限公司 | Treatment method of power plant circulating sewage |
CN105084493A (en) * | 2015-09-28 | 2015-11-25 | 宁波高新区巴艺新材料科技有限公司 | Steel wastewater treatment method |
CN105110441A (en) * | 2015-09-30 | 2015-12-02 | 宁波保税区韬鸿化工科技有限公司 | Water treatment agent and preparing method |
CN105110395A (en) * | 2015-09-30 | 2015-12-02 | 宁波保税区韬鸿化工科技有限公司 | Water treatment agent and preparing method |
CN105198056A (en) * | 2015-09-30 | 2015-12-30 | 宁波保税区韬鸿化工科技有限公司 | Paper making waste water treating agent and preparation method thereof |
CN107473318A (en) * | 2017-08-22 | 2017-12-15 | 承德人和矿业有限责任公司 | One kind contains illitic mineral complex and preparation method and purposes |
CN108465458A (en) * | 2018-06-25 | 2018-08-31 | 黄益良 | A kind of dye wastewater inorganic agent and preparation method thereof |
CN108503387A (en) * | 2017-02-24 | 2018-09-07 | 宁波清水坊环保科技有限公司 | A kind of scale inhibition ball and preparation method thereof |
CN108745317A (en) * | 2018-06-19 | 2018-11-06 | 黄益良 | A kind of Polymer sewage treatment agent and preparation method thereof |
CN108793321A (en) * | 2018-06-14 | 2018-11-13 | 崔凡 | The water treatment agent of one heavy metal species and petroleum pollution |
CN113522230A (en) * | 2021-07-27 | 2021-10-22 | 桂林理工大学 | Mineral adsorbent and preparation method and application thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10314416A1 (en) * | 2003-03-28 | 2004-11-04 | Otto-Von-Guericke-Universität Magdeburg | Separation of toxic heavy metal ions from waste waters, adsorbs them onto porous concrete adsorbents produced by calcining under given conditions |
CN102173496A (en) * | 2011-03-25 | 2011-09-07 | 中国科学院南京土壤研究所 | Phosphorous removing agent for wastewater produced during producing organophosphorus pesticides and preparation method thereof |
CN102527331A (en) * | 2012-01-09 | 2012-07-04 | 上海海洋大学 | Hydroxyapatite-modified zeolite composite material adsorbent, and preparation method and application thereof |
CN102658082A (en) * | 2012-04-25 | 2012-09-12 | 武汉理工大学 | Inorganic composite material for absorbent refining multiple metal ion industrial sewage and application method thereof |
-
2013
- 2013-01-17 CN CN201310017703.0A patent/CN103055804B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10314416A1 (en) * | 2003-03-28 | 2004-11-04 | Otto-Von-Guericke-Universität Magdeburg | Separation of toxic heavy metal ions from waste waters, adsorbs them onto porous concrete adsorbents produced by calcining under given conditions |
CN102173496A (en) * | 2011-03-25 | 2011-09-07 | 中国科学院南京土壤研究所 | Phosphorous removing agent for wastewater produced during producing organophosphorus pesticides and preparation method thereof |
CN102527331A (en) * | 2012-01-09 | 2012-07-04 | 上海海洋大学 | Hydroxyapatite-modified zeolite composite material adsorbent, and preparation method and application thereof |
CN102658082A (en) * | 2012-04-25 | 2012-09-12 | 武汉理工大学 | Inorganic composite material for absorbent refining multiple metal ion industrial sewage and application method thereof |
Non-Patent Citations (2)
Title |
---|
任海贝 等: "CPAM 二次改性有机膨润土的脱色性能研究", 《环境科学与技术》 * |
郑水林: "非金属矿物材料的加工与应用", 《中国非金属矿工业导刊》 * |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103708593A (en) * | 2013-12-26 | 2014-04-09 | 张�成 | Dyeing wastewater treatment agent and preparation method thereof |
CN103708593B (en) * | 2013-12-26 | 2015-08-26 | 邯郸学院 | A kind of dyeing and printing sewage treatment agent and preparation method thereof |
CN104276670A (en) * | 2014-09-30 | 2015-01-14 | 希望环保(福建)有限公司 | Sewage treating agent containing natural mineral substances and preparation method thereof |
CN104276670B (en) * | 2014-09-30 | 2016-08-24 | 希望环保(福建)有限公司 | A kind of sewage-treating agent containing natural mineral matter and preparation method |
CN104845910A (en) * | 2015-05-13 | 2015-08-19 | 河海大学 | Biochemical reagent and preparation method and application thereof |
CN105060374A (en) * | 2015-09-28 | 2015-11-18 | 宁波高新区巴艺新材料科技有限公司 | Treatment method of power plant circulating sewage |
CN105084493A (en) * | 2015-09-28 | 2015-11-25 | 宁波高新区巴艺新材料科技有限公司 | Steel wastewater treatment method |
CN105198056A (en) * | 2015-09-30 | 2015-12-30 | 宁波保税区韬鸿化工科技有限公司 | Paper making waste water treating agent and preparation method thereof |
CN105110395A (en) * | 2015-09-30 | 2015-12-02 | 宁波保税区韬鸿化工科技有限公司 | Water treatment agent and preparing method |
CN105110441A (en) * | 2015-09-30 | 2015-12-02 | 宁波保税区韬鸿化工科技有限公司 | Water treatment agent and preparing method |
CN108503387A (en) * | 2017-02-24 | 2018-09-07 | 宁波清水坊环保科技有限公司 | A kind of scale inhibition ball and preparation method thereof |
CN107473318A (en) * | 2017-08-22 | 2017-12-15 | 承德人和矿业有限责任公司 | One kind contains illitic mineral complex and preparation method and purposes |
CN108793321A (en) * | 2018-06-14 | 2018-11-13 | 崔凡 | The water treatment agent of one heavy metal species and petroleum pollution |
CN108745317A (en) * | 2018-06-19 | 2018-11-06 | 黄益良 | A kind of Polymer sewage treatment agent and preparation method thereof |
CN108465458A (en) * | 2018-06-25 | 2018-08-31 | 黄益良 | A kind of dye wastewater inorganic agent and preparation method thereof |
CN113522230A (en) * | 2021-07-27 | 2021-10-22 | 桂林理工大学 | Mineral adsorbent and preparation method and application thereof |
CN113522230B (en) * | 2021-07-27 | 2023-02-28 | 桂林理工大学 | Mineral adsorbent and preparation method and application thereof |
Also Published As
Publication number | Publication date |
---|---|
CN103055804B (en) | 2015-02-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103055804B (en) | Compound water treatment agent as well as preparation method and application thereof | |
Zou et al. | Removal of cyanobacterial blooms in Taihu Lake using local soils II. Effective removal of Microcystis aeruginosa using local soils and sediments modified by chitosan | |
CN102718358B (en) | Sewage treatment method | |
CN102674562A (en) | Material and method for repairing polluted water and bottom mud | |
CN101186400A (en) | Harmless treatment method for discarded slurry | |
CN104478055B (en) | Sewage disposal complexing agent, its preparation method and methods for using them | |
CN100463868C (en) | Ecological, environmental protective composite water treatment agent | |
Diver et al. | The potential and constraints of replacing conventional chemical coagulants with natural plant extracts in water and wastewater treatment | |
CN102206022B (en) | Physicochemical biological ecological method of system applied to sewage advanced treatment | |
CN107010690A (en) | A kind of city domestic sewage dephosphorization agent and preparation method thereof | |
Chaudhary et al. | Use of duckweed in wastewater treatment | |
Dkhissi et al. | Valorization of Opuntia ficus-Indica pads and steel industry FeCl3-Rich rejection for removing surfactant and phenol from oil refinery wastewater through coagulation-flocculation | |
CN101497032A (en) | Method for preparing biological sorbent and method of use thereof | |
CN104671634A (en) | Iron inorganic flocculant sludge dewatering agent | |
CN105481184B (en) | Food and drink waste water handles retracting device and method | |
CN107382028B (en) | Sediment condensation reducing agent and preparation method and application thereof | |
CN1202022C (en) | Ecological safety composite type iron system high-effective flocculating agent | |
CN105236535A (en) | Compound flocculating agent and preparation method thereof | |
CN107324416A (en) | Water Treatment agent | |
CN112520835A (en) | Integrated remediation agent for black and odorous water body and bottom mud and preparation method | |
Ghaly et al. | Carwash Wastewater Treatment and Reclamation Technologies for Water Conservation and Pollution Load Reduction: A Review | |
CN105060448A (en) | Heavy-metal-containing sewage purifying agent and purifying method thereof | |
Tran et al. | Dewatering of urban lake sediments using constructed wetlands: a case study in Hanoi, Vietnam | |
Muhamad Hanafi | Landfill leachate treatment by combination of electro-fenton and sequencing batch reactor method | |
AS et al. | Potential use of Water Hyacinth [Eichhornia crassipes (Mart.) Solms] in constructed wetlands for treatment of textile effluent in Common Effluent Treatment Plant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |