KR970015485A - Treatment method of selenium wastewater - Google Patents

Treatment method of selenium wastewater Download PDF

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Publication number
KR970015485A
KR970015485A KR1019960042436A KR19960042436A KR970015485A KR 970015485 A KR970015485 A KR 970015485A KR 1019960042436 A KR1019960042436 A KR 1019960042436A KR 19960042436 A KR19960042436 A KR 19960042436A KR 970015485 A KR970015485 A KR 970015485A
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South Korea
Prior art keywords
selenium
wastewater
neutralizing agent
reducing
agent
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KR1019960042436A
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Korean (ko)
Inventor
히데노리 오카모토
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사카모토 다카시
닛코 긴조쿠 가부시키가이샤
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Publication of KR970015485A publication Critical patent/KR970015485A/en

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    • 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
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C02F1/705—Reduction by metals
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B19/00—Selenium; Tellurium; Compounds thereof
    • C01B19/02—Elemental selenium or tellurium
    • 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
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F1/70—Treatment of water, waste water, or sewage by reduction

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

Abstract

셀렌함유폐수에 SeO3 2-의 형태로 용존하는 셀렌은 물론, 또한 SeO4 2-의 형태로 용존하는 셀렌의 회수를 실현하는 것, 및 환원제의 유효이용을 도모한다.The selenium dissolved in selenium wastewater in the form of SeO 3 2- as well as the recovery of selenium dissolved in the form of SeO 4 2- can be realized, and effective use of a reducing agent can be achieved.

그를 위하여 본 발명은, 셀렌을 함유하는 폐수중에 환원제 및 중화제를 첨가하여 셀렌을 환원제거하는 방법에 있어서, 상기 폐수를 대기분위기하에서 40~80℃의 온도범위로 가열함과 동시에 이 폐수원액중에 황산제1철을 첨가혼합하고, 또한, 이 혼합액중에 중화제를 첨가함으로써 셀렌을 환원하여 제거한다. 그리고, 식크너 침전물에 황산을 가하여 환원제로서 재이용한다.To this end, the present invention relates to a method for reducing and removing selenium by adding a reducing agent and a neutralizing agent to wastewater containing selenium, wherein the wastewater is heated to a temperature range of 40 to 80 ° C. under an atmospheric atmosphere and sulfuric acid is contained in the wastewater stock solution. Ferrous iron is added and mixed, and selenium is reduced and removed by adding a neutralizing agent to the mixed liquid. Sulfuric acid is added to the Sinkner precipitate and reused as a reducing agent.

Description

셀렌함유폐수의 처리방법Treatment method of selenium wastewater

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 따른 처리공정을 나타내는 그래프.3 is a graph showing a treatment process according to the present invention.

Claims (8)

셀렌을 함유하는 폐수중에 환원제 및 중화제를 첨가하여 셀렌을 환원제거하는 방법에 있어서, 상기 폐수의 원액중에 황산제1철 및 중화제를 첨가 혼합함과 동시에, 대기분위기중에서 40∼80℃의 온도로 가열함으로써셀렌을 환원하고, 식크너 침전물로서 제거하는 것을 특징으로 하는 셀렌함유폐수의 처리방법.A method of reducing and removing selenium by adding a reducing agent and a neutralizing agent to a wastewater containing selenium, wherein ferrous sulfate and a neutralizing agent are added to and mixed with the stock solution of the wastewater and heated to a temperature of 40 to 80 ° C. in an air atmosphere. Thereby reducing the selenium and removing it as a Sinkner precipitate. 셀렌을 함유하는 폐수중에 환원제 및 중화제를 첨가하여 셀렌을 환원제거하는 방법에 있어서, 상기 폐수의 원액중에 황산제1철 및 중화제를 첨가 혼합함과 동시에, 대기분위기중에서 40∼80C의 온도로 가열함으로써셀렌을 환왼하고, 식크너 침전물로 하고, 이 식크너 침전물에 황산을 첨가하여 미용해잔류물을 여과기로 여과함으로써 셀렌을 분리제거함과 동시에 여액을 회수하고, 이 여액을 상기 폐수원액의 환원제로서 재활용하는 것을 특징으로 하는 셀렌함유폐수의 처리방법.In a method of reducing and removing selenium by adding a reducing agent and a neutralizing agent to a wastewater containing selenium, by adding and mixing ferrous sulfate and a neutralizing agent to the stock solution of the wastewater, and heating it at a temperature of 40 to 80C in an air atmosphere. Selenium is left to make a Sinkner precipitate, sulfuric acid is added to the Sinkner precipitate, and the undissolved residue is filtered through a filter to separate and remove selenium and to recover the filtrate, and the filtrate is recycled as a reducing agent of the wastewater solution. The selenium wastewater treatment method characterized in that. 제1항 또는 제2항에 있어서, 폐수원액중에서의 황산제1철 첨가량은, Fe2+이온량으로서 0.5∼30g/ℓ 범위내인 것을 특징으로 하는 셀렌함유폐수의 처리방법.The method for treating selenium-containing wastewater according to claim 1 or 2, wherein the amount of ferrous sulfate added in the wastewater stock solution is in the range of 0.5 to 30 g / l as the amount of Fe 2+ ions. 제1항 또는 제2항에 있어서, 폐수원액중에의 중화제 첨가에 있어서는, 이 액의 pH를 8∼10범위로 조정하는 것을 특징으로 하는 셀렌함유폐수의 처리방법.The method for treating selenium-containing wastewater according to claim 1 or 2, wherein the pH of the liquid is adjusted to a range of 8 to 10 in the addition of the neutralizing agent to the wastewater stock solution. 셀렌을 함유하는 폐수중에 환원제 및 중화제를 첨가하여 셀렌을 환원제거하는 방법에 있어서, 그 폐수를 대기분위기하에서 40∼80℃의 온도로 가열함과 동시에, 이 폐수중에 황산제1철 및 중화제를 첨가 혼합하여 셀렌을 환원하고, 그후 침강제를 첨가한 후 식크닝하고, 이 식크닝에 의해 발생한 셀렌 및 제1철 함유 식크너침전물을 셀렌 함유폐수의 예비처리조중에 첨가하여 그 폐수중의 셀렌농도를 감소하는 예비처리에 재 이용하고, 이 예비처리액을 상기 가열공정에 제공하는 것을 특징으로 하는 셀렌함유 폐수의 처리방법.A method of reducing and removing selenium by adding a reducing agent and a neutralizing agent to wastewater containing selenium, wherein the wastewater is heated to a temperature of 40 to 80 ° C. under an air atmosphere, and ferrous sulfate and a neutralizing agent are added to the wastewater. After mixing, the selenium is reduced, and then, after adding a settling agent, it is squeezed, and the selenium and ferrous scavenger precipitates generated by the squeezing are added to the pretreatment tank of the selenium-containing waste water, and the concentration of selenium in the waste water. The method for treating selenium-containing wastewater, wherein the pretreatment liquid is reused in a pretreatment to reduce the temperature. 제5항에 있어서, 상기 예비처리하는, 우선 셀렌함유폐수를 예비처리조에 있어서, 대기분위기하에서 40∼80℃의 온도로 가열함과 동시에, 이 폐수중에 셀렌폐수처리시에 발생하는 제1철함유 식크너 침전물과 중화제를첨가함으로써 셀렌을 예비환원하고, 또한 침강제를 가하여 식크닝 처리하고나서 여과하고, 그 여과잔류물을 분리제거하는 한편, 이때 발생하는 여액을 식크너 상징액과 항께 본처리조내에 공급하는 방법인 것을 특징으로하는 셀렌함유폐수의 처리방법.The wastewater containing selenium according to claim 5, wherein the selenium-containing wastewater is first heated in a pre-treatment tank at a temperature of 40 to 80 DEG C in an air atmosphere and generated during selenium wastewater treatment in the wastewater. Selenium is pre-reduced by adding Sikner precipitate and neutralizing agent, and further leached by adding a settling agent and filtered, and the filtrate is separated and removed. A method of treating selenium-containing wastewater, which is a method of supplying the liquid into the container. 제5항 또는 제6항에 있어서, 예비처리조 및 본처리조중에의 중화제 첨가에 있어서는 피처리액의 pH를8∼10범위로 조정하는 것을 특징으로 하는 셀렌함유폐수의 처리방법.The method for treating selenium-containing wastewater according to claim 5 or 6, wherein the pH of the liquid to be treated is adjusted to be in the range of 8 to 10 in the addition of the neutralizing agent to the pretreatment tank and the main treatment tank. 제5항 또는 제6항에 있어서, 본처리조중에의 황산제1철의 첨가량은 Fe2+이온량으로서 0.5∼3.0g/ℓ 범위내로 하는 것을 특징으로 하는 셀렌함유폐수의 처리방법.The method for treating selenium-containing wastewater according to claim 5 or 6, wherein the amount of ferrous sulfate added to the treatment tank is in the range of 0.5 to 3.0 g / L as the amount of Fe 2+ ions. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960042436A 1995-09-27 1996-09-25 Treatment method of selenium wastewater KR970015485A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP95-249090 1995-09-27
JP95-249091 1995-09-27
JP24909095 1995-09-27
JP24909195 1995-09-27

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JP3577832B2 (en) * 1996-05-13 2004-10-20 旭硝子株式会社 Method for removing Se from Se-containing liquid
KR100926915B1 (en) * 2004-04-26 2009-11-17 미쓰비시 마테리알 가부시키가이샤 Method for treating wastewater and wastewater treatment apparatus
AR089948A1 (en) * 2012-02-10 2014-10-01 Kemira Oyj PROCEDURES FOR THE EXTRACTION OF METALS AND OXYIONS FROM WATER CURRENTS

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US4806246A (en) * 1986-04-11 1989-02-21 Applied Membrane Technology, Inc. Pore size control using plasma polymerization techniques
DE3724419A1 (en) * 1987-07-23 1989-02-02 Krupp Gmbh Process for purifying waste water
US5330658A (en) * 1993-03-17 1994-07-19 Westinghouse Electric Corporation Solution decontamination method using precipitation and flocculation techniques

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