WO2019022376A1 - Procédé de traitement des eaux usées - Google Patents

Procédé de traitement des eaux usées Download PDF

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Publication number
WO2019022376A1
WO2019022376A1 PCT/KR2018/006660 KR2018006660W WO2019022376A1 WO 2019022376 A1 WO2019022376 A1 WO 2019022376A1 KR 2018006660 W KR2018006660 W KR 2018006660W WO 2019022376 A1 WO2019022376 A1 WO 2019022376A1
Authority
WO
WIPO (PCT)
Prior art keywords
wastewater
nitrogen
titanium oxide
fluorine
present
Prior art date
Application number
PCT/KR2018/006660
Other languages
English (en)
Korean (ko)
Inventor
박민규
김현모
김종천
Original Assignee
주식회사 모노리스
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 모노리스 filed Critical 주식회사 모노리스
Priority to CN201880054414.9A priority Critical patent/CN111065605A/zh
Publication of WO2019022376A1 publication Critical patent/WO2019022376A1/fr

Links

Classifications

    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers

Definitions

  • the present invention relates to a method for treating wastewater.
  • nitric acid or hydrofluoric acid compound is used for etching and cleaning, and a large amount of water is used together to discharge wastewater containing a high concentration of nitrogen and fluorine components .
  • Fluoride is required to remove fluoride because it causes neurological damage as well as bones and skeleton when humans are inhaled for a long time at a concentration of 1.5 ppm or more, which is an environmental standard value. Nitrogen is also becoming one of the serious pollutants that cause eutrophication that deteriorates the quality of water as well as toxic effects on human and other life forms.
  • the conventional treatment methods of industrial wastewater can be divided into physical, chemical and biological methods.
  • biological industrial waste water treatment also in a conventional biological method for processing the industrial waste water is to tenp ⁇ (Bardenpho), A 2 / O (Anaerobic / Anoxic / Oxic), A / O (Anaerobic / Oxic ), UTC (University of Cape Town) and VIP (Virginia (Initiative Plant)) have been developed.
  • These biological treatment processes mainly include aeration and non-aeration And is a process for treating industrial wastewater through biological means such as microorganisms while driving in combination. This biological treatment process has recently been widely used in many advanced countries.
  • Korean Patent Registration No. 10-1682392 discloses a wastewater treatment facility for removing nitrogen components in wastewater by using oxygen and aerobic microorganisms, and improving the treatment efficiency by making oxygen micro-bubble generator .
  • Korean Patent Laid-Open Publication No. 2016-0095452 discloses a method for removing fluorine components from wastewater by using a composition containing an Al compound, a ferric compound and an inorganic acid at a constant molar ratio.
  • Korean Patent Laid-Open Publication No. 2016-0095452 (2016.08.11), a composition for removing fluorine components from wastewater, and a method for removing fluorine components from wastewater using the composition
  • the present inventors have conducted various studies to solve the above-mentioned problems, and as a result, they have found that nitrogen and fluorine components can be effectively removed simultaneously when using titanium oxide in wastewater treatment.
  • an object of the present invention is to provide a method for treating wastewater which can efficiently remove nitrogen and fluorine components contained in wastewater.
  • the present invention provides a method for treating waste water, comprising the steps of: a) reacting wastewater with titanium oxide; And b) removing the metal complex formed in the step a).
  • the titanium oxide may be added to the wastewater at a concentration of 0.3 to 0.5 g / L.
  • the wastewater may include at least one selected from the group consisting of fluorine, ammonia nitrogen and nitrate nitrogen.
  • the wastewater may be wastewater discharged from the semiconductor manufacturing process.
  • the step a) may be carried out continuously or batchwise.
  • the step a) may be carried out at 40 to 80 ° C.
  • the method for treating wastewater according to the present invention can remove nitrogen and fluorine components at the same time by using titanium oxide, thereby improving treatment efficiency of wastewater.
  • it can be applied to various industrial fields by effectively treating nitrogen and fluorine components in wastewater through a simplified process.
  • the present invention proposes a wastewater treatment method for efficiently removing nitrogen and fluorine components simultaneously from wastewater.
  • Wastewater containing nitrogen and fluorine components is generated in many semiconductor production plants, refineries, and fine chemical plants. Since wastewater discharged from such industrial sites contains nitrogen and fluorine at high concentrations and is harmful to human or environment, a treatment process for removing these components is indispensable.
  • the present invention provides a wastewater treatment method capable of simultaneously removing nitrogen and fluorine components in wastewater with high efficiency by using titanium oxide.
  • a method for treating wastewater according to the present invention comprises the steps of: a) reacting wastewater with titanium oxide; And b) removing the metal complex compound produced in step a).
  • step a) reacts wastewater with titanium oxide.
  • the wastewater to be treated in the present invention is wastewater discharged from a semiconductor manufacturing process and includes hydrofluoric acid (HF), ammonia (NH 3 ), ammonium fluoride (NH 4 F), nitric acid (HNO 3 ) and the like.
  • the wastewater may include at least one selected from the group consisting of fluorine, ammonia nitrogen (NH 3 -N), and nitrate nitrogen (NO 3 -N).
  • the above-mentioned titanium oxide is an oxide of natural iron and titanium, also called Ilmenite or titanium iron, and has a chemical composition formula of FeTiO 3 .
  • the titanium oxide is used as a raw material in the commercial production of titanium oxide (TiO 2 ), and its chemical composition is different depending on the mountain region, such as Australia, Norway, Russia Ural region, India, Canada, USA, and Malaysia.
  • some of the Fe 2 + of the FeTiO 3 can be substituted by Mg + 2.
  • the form of the above-mentioned titanium oxide is not particularly limited, it is preferable to use powder form from the viewpoint of efficiency of wastewater treatment, ease of handling, and the like.
  • the average particle size of the above-mentioned titanium oxide is preferably 1000 ⁇ ⁇ or less, more preferably 100 to 800 ⁇ ⁇ , and still more preferably 100 to 500 ⁇ ⁇ .
  • step (a) of the present invention the nitrogen and fluorine components in the wastewater react with the titanium oxide to form a metal complex compound such as a titanium compound ((NH 3 ) 3 TiF 7 ) or an iron compound ((NH 3 ) 3 FeF 6 ) Removed.
  • a metal complex compound such as a titanium compound ((NH 3 ) 3 TiF 7 ) or an iron compound ((NH 3 ) 3 FeF 6 ) Removed.
  • the titanium oxide may be added in consideration of the concentration of nitrogen and fluorine components in the wastewater to be treated.
  • the titanium oxide may be added to the wastewater at a concentration of 0.3 to 0.5 g / L.
  • the nitrogen and fluorine components in the wastewater can not be sufficiently removed.
  • the amount exceeds the above range, the effect is not improved due to excessive input.
  • the reaction of step a) may be carried out at a temperature of 40 to 80 ° C.
  • the reaction pressure may be varied depending on the reaction conditions, and is not particularly limited, and may be selected from a wide range of pressure, normal pressure and pressure.
  • the step a) may be carried out continuously or batchwise, and the type, form, size, etc. of the reactors are not limited, and those skilled in the art can appropriately select according to the composition, amount and reaction conditions of the wastewater to be treated.
  • the nitrogen and fluorine components in the wastewater can be removed by continuously passing the wastewater to be treated to the filter or column packed with the titanium oxide.
  • the wastewater is passed at a constant flow rate for sufficient contact with the titanate, wherein the flow rate of the wastewater can be between 10 and 1000 ml / min.
  • nitrogen and fluorine components in the wastewater can be removed through stirring the titanium oxide into the reactor containing the wastewater.
  • the agitation time and the agitation speed may be adjusted so that the wastewater and the titanium oxide can be physically contacted sufficiently during the agitation.
  • the agitation may be performed at 100 to 300 rpm for 60 to 90 minutes.
  • step b) removes the metal complexes formed in step a) described above.
  • the metal complex is a titanium compound or an iron compound formed through the step a).
  • the removal can be carried out by precipitating the resulting metal complex.
  • the precipitation may be carried out at 40 to 80 ° C (or pH 6 to 9).
  • the wastewater from which the metal complex is removed can be discharged as treated water.
  • the coagulant may be added after step b).
  • the flocculant is for removing nitrogen and fluorine components remaining in wastewater after the steps a) and b), and can be used without any particular limitation as long as it is commonly used in the technical field.
  • the coagulant may be an inorganic coagulant or an organic coagulant.
  • Examples of the inorganic coagulant include calcium hydroxide (Ca (OH) 2 ), calcium chloride (CaCl 2 ), calcium oxide (CaO), calcium sulfate (CaSO 4 ), calcium carbonate (CaCO 3 ), aluminum polychloride ; PAC), ferrous chloride (FeCl 2), ferric chloride (FeCl 3), aluminum sulfate (Al 2 (SO 4) 3 ), ferrous sulfate (FeSO 4), ferric sulfate (Fe 2 SO 4 ), ammonium alum (Al (NH 4 ) (SO 4 ) 2 .12H 2 O), sodium aluminate, and the like.
  • Examples of the organic coagulant include polyacrylamide-based polymers.
  • the wastewater treatment method of the present invention has the following advantages as compared with the conventional wastewater treatment method.
  • using titanium oxide can remove nitrogen and fluorine components in the wastewater at the same time, and is excellent in process efficiency and economical efficiency because of excellent treatment efficiency.
  • the wastewater treatment method according to the present invention can be applied to various industrial fields because it can realize excellent treatment efficiency through a simplified process.
  • the removal efficiencies of nitrogen and fluorine components in the wastewater are respectively 90%, preferably 95% or more.
  • the nitrogen concentration in the treated water finally discharged by the wastewater treatment method of the present invention is 30 ppm or less and the fluorine concentration is 10 ppm or less.
  • the wastewater was passed through a titanium oxide filter at a flow rate of 10 ml / min at 50 ° C for 60 minutes.
  • titanium oxide 500 mg was added to 1000 ml of wastewater, and the mixture was stirred at 80 ° C and 300 rpm for 90 minutes.
  • Nitrogen and fluorine concentrations of the wastewater and treated water used in the above Examples and Comparative Examples were measured.
  • the nitrogen concentration was measured using the Nessler method of the HACH manual.
  • the fluorine concentration was measured according to Standard Methods (APHA, 1995) and C-MAC manual.
  • the method of treating wastewater according to the present invention makes it possible to apply to various industries by removing nitrogen and fluorine components in wastewater at the same time with excellent treatment efficiency by using titanium oxide.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Catalysts (AREA)

Abstract

La présente invention concerne un procédé de traitement des eaux usées et, plus particulièrement, un procédé de traitement des eaux usées comprenant les étapes qui consistent à : a) faire réagir les eaux usées avec de l'ilménite; et b) éliminer un composé complexe métallique produit à l'étape a). Le procédé de traitement des eaux usées selon la présente invention élimine simultanément les composants d'azote et de fluor des eaux usées au moyen d'ilménite à excellente efficacité d'élimination, est composé d'un ensemble de processus simple, et possède une utilité industrielle, ce qui permet de trouver des applications dans divers domaines industriels.
PCT/KR2018/006660 2017-07-27 2018-06-12 Procédé de traitement des eaux usées WO2019022376A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880054414.9A CN111065605A (zh) 2017-07-27 2018-06-12 废水处理方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0095375 2017-07-27
KR1020170095375A KR102099426B1 (ko) 2017-07-27 2017-07-27 폐수의 처리 방법

Publications (1)

Publication Number Publication Date
WO2019022376A1 true WO2019022376A1 (fr) 2019-01-31

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Family Applications (1)

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PCT/KR2018/006660 WO2019022376A1 (fr) 2017-07-27 2018-06-12 Procédé de traitement des eaux usées

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KR (1) KR102099426B1 (fr)
CN (1) CN111065605A (fr)
WO (1) WO2019022376A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116282699B (zh) * 2023-03-06 2023-12-05 武汉天源环保股份有限公司 一种半导体废水处理方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003285083A (ja) * 2002-03-27 2003-10-07 Tsukishima Kikai Co Ltd 水の浄化方法
KR20050088534A (ko) * 2004-03-02 2005-09-07 주식회사 바이오플러스 폐수처리방법
US20090045135A1 (en) * 2007-08-18 2009-02-19 Khudenko Engineering, Inc. Method for water filtration
US20120325731A1 (en) * 2010-09-03 2012-12-27 Kabushiki Kaisha Toshiba Wastewater treatment method
US9663375B2 (en) * 2012-07-21 2017-05-30 K-Technologies, Inc. Processes for the recovery of fluoride and silica products and phosphoric acid from wet-process phosphoric acid facilities and contaminated waste waters

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09117775A (ja) * 1995-10-23 1997-05-06 Shinriyou:Kk フッ素およびアンモニア態窒素を含有する廃液の処理方法
JP3688505B2 (ja) * 1999-03-18 2005-08-31 富士通株式会社 フッ素含有廃液の処理方法および装置
JP2001300518A (ja) 2000-04-19 2001-10-30 Nippon Shokubai Co Ltd アンモニア含有廃水の処理方法
KR101656825B1 (ko) 2015-02-03 2016-09-12 최윤진 폐수로부터 불소 성분을 제거하는 조성물 및 이를 이용하여 폐수로부터 불소 성분을 제거하는 방법
KR101682392B1 (ko) 2016-04-19 2016-12-05 정재억 폐수처리설비

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003285083A (ja) * 2002-03-27 2003-10-07 Tsukishima Kikai Co Ltd 水の浄化方法
KR20050088534A (ko) * 2004-03-02 2005-09-07 주식회사 바이오플러스 폐수처리방법
US20090045135A1 (en) * 2007-08-18 2009-02-19 Khudenko Engineering, Inc. Method for water filtration
US20120325731A1 (en) * 2010-09-03 2012-12-27 Kabushiki Kaisha Toshiba Wastewater treatment method
US9663375B2 (en) * 2012-07-21 2017-05-30 K-Technologies, Inc. Processes for the recovery of fluoride and silica products and phosphoric acid from wet-process phosphoric acid facilities and contaminated waste waters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GARCIA-MUNOZ, PATRICIA: "Treatment of hospital wastewater through the CWPO-Photoassisted process catalyzed by ilmenite", JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, vol. 5, no. 5, 24 August 2017 (2017-08-24), pages 4337 - 4343, XP055569611, Retrieved from the Internet <URL:https://doi.org/10.1016/j.jece.2017.08.023> *

Also Published As

Publication number Publication date
CN111065605A (zh) 2020-04-24
KR102099426B1 (ko) 2020-04-09
KR20190012432A (ko) 2019-02-11

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