KR19990040953A - Refractory organic material processing device with multi-stage oxidation tank - Google Patents
Refractory organic material processing device with multi-stage oxidation tank Download PDFInfo
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Abstract
1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION
다단산화조를 갖는 난분해성 유기물질 처리장치.Refractory organic material processing apparatus having a multi-stage oxidation tank.
2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention
생물학적으로 제거되지 않는 고령화된 매립지의 침출수 및 산업폐수를 정화처리하는데 있어, 산화조를 다단으로 분리하여 유기물질의 처리효율을 향상시키고자 함.In purifying leachate and industrial wastewater of aging landfill which is not biologically removed, the oxidizer is divided into multiple stages to improve the treatment efficiency of organic materials.
3. 발명의 해결방법의 요지3. Summary of Solution to Invention
응집제를 투입하여 교반 및 pH농도 조정을 통해 폐수의 유기물질을 화학적으로 응집 및 침전시키는 제 1응집침전수단; 촉매 및 산화제를 투입하여 상기 제 1응집침전수단으로부터 유입된 폐수 중 미세 유기물질을 산화처리하는 펜톤산화수단; 및 상기 펜톤산화수단에서 사용된 산화제를 완속 교반 및 pH농도 조정을 통해 응집침전시키는 제 2응집침전수단을 구비하되, 상기 펜톤산화수단은 다단으로 분해되어 동일한 동작조건으로 순차적으로 처리된다.A first flocculation sedimentation means for chemically flocculating and precipitating organic substances in the wastewater by adding a flocculant and stirring and adjusting the pH concentration; Fenton oxidation means for oxidizing the fine organic material in the wastewater introduced from the first flocculation sedimentation means by adding a catalyst and an oxidizing agent; And a second flocculation sedimentation means for flocculating the oxidant used in the fenton oxidation means through slow stirring and adjusting the pH concentration, wherein the fenton oxidation means is decomposed into multiple stages and sequentially processed under the same operating conditions.
4. 발명의 중요한 용도4. Important uses of the invention
난분해성 유기물질 정화처리에 이용됨.Used to purify hardly degradable organic substances.
Description
본 발명은 난분해성 유기물질 처리장치에 관한 것으로서, 특히 생물학적으로 제거되지 않는 고령화된 매립지의 침출수 및 산업폐수를 정화처리하는데 있어서, 산화조를 다단으로 분리하여 유기물질의 처리효율을 향상시킨 난분해성 유기물질 처리장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating hardly decomposable organic substances. In particular, in purifying leachate and industrial wastewater of an aged landfill which is not biologically removed, the oxidation tank is separated into multiple stages to improve the treatment efficiency of organic substances. It relates to an organic material processing apparatus.
난분해성 유기물질을 처리하기 위한 종래의 방법으로는 화학적 산화방법이 있는데, 이는 다시 오존, 자외선, 과산화수소 등을 산화제로 이용하는 방법들로 구분할 수 있다.Conventional methods for treating hardly decomposable organic materials include chemical oxidation, which can be further divided into methods using ozone, ultraviolet rays, hydrogen peroxide, etc. as oxidants.
이러한 종래의 난분해성 유기물질 처리방법 중 오존을 산화제로 이용하는 경우에는 오존 생성시 다량의 거품이 발생되어 운영상의 어려움이 있으며, 자외선을 이용하는 방법은 처리 대상 폐수의 색도나 탁도가 높을 경우 처리효율이 현저하게 감소되는 단점이 있다. 그러므로, 일반적으로 철염을 촉매로 하여 과산화수소를 산화제로 이용하는 펜톤산화방법이 이용되고 있다.When ozone is used as an oxidizing agent in the conventional methods of treating non-degradable organic substances, a large amount of bubbles are generated when ozone is generated, and there is a difficulty in operating the method using ultraviolet rays. There is a drawback that is significantly reduced. Therefore, in general, a fenton oxidation method using iron peroxide as a catalyst and hydrogen peroxide as an oxidizing agent is used.
그러나, 펜톤산화방법도 난분해성 유기물질의 농도가 높을 경우 약품비가 과다하게 소요되고, 저농도 폐수에 비하여 처리효율이 감소된다는 문제점이 있었다.However, the fenton oxidation method has a problem that excessive chemical costs are required when the concentration of the hardly decomposable organic substance is high, and treatment efficiency is reduced as compared with low concentration wastewater.
따라서, 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 본 발명은 펜톤산화조를 다단으로 분리하여 각각 동일한 처리과정으로 처리함으로써 유기물질의 처리효율을 향상시킨 난분해성 유기물질 처리장치를 제공하는데 그 목적이 있다.Accordingly, the present invention devised to solve the problems of the prior art as described above is to provide a non-degradable organic material processing apparatus that improves the treatment efficiency of organic materials by separating the Fenton oxidation tank in multiple stages and treating them in the same process. The purpose is.
도 1은 본 발명에 따른 난분해성 유기물질 처리장치의 개략적인 구조도.1 is a schematic structural diagram of an apparatus for treating hardly decomposable organic substances according to the present invention.
도 2는 본 발명에 따른 펜톤산화조의 세부 구조도.2 is a detailed structural diagram of a fenton oxidation tank according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of Symbols for Main Parts of Drawings>
1 : 급속교반조 2 : 제 1pH 조정기1: Rapid Stirring 2: 1pH Regulator
3 : 제 1완속교반조 4 : 제 2약품침전조3: first slow stirring aqueous 4: second chemical precipitation precipitating
5 : 화학적 산화조(펜톤산화조) 6 : 제 2pH 조정기5: Chemical Oxidation Tank (Fenton Oxidation Tank) 6: Second pH Regulator
7 : 제 2완속교반조 8 : 제 2약품침전조7: 2nd slow stirring 8: 2nd chemical precipitation
상기 목적을 달성하기 위한 본 발명은, 응집제를 투입하여 교반 및 pH농도 조정을 통해 폐수의 유기물질을 화학적으로 응집 및 침전시키는 제 1응집침전수단; 촉매 및 산화제를 투입하여 상기 제 1응집침전수단으로부터 유입된 폐수중 미세 유기물질을 산화처리하는 펜톤산화수단; 및 상기 펜톤산화수단에서 사용된 산화제를 완속 교반 및 pH농도 조정을 통해 응집침전시키는 제 2응집침전수단을 구비하되, 상기 펜톤산화수단은 다단으로 분할되어 동일한 동작조건으로 순차적으로 처리되는 것을 특징으로 한다.The present invention for achieving the above object, the first flocculation means for agglomeration and precipitation of the organic material in the waste water through agitation and pH adjustment by the flocculation agent; Fenton oxidation means for oxidizing the fine organic material in the wastewater introduced from the first flocculation sedimentation means by adding a catalyst and an oxidizing agent; And a second flocculation sedimentation means for flocculating the oxidant used in the fenton oxidation means by slow stirring and adjusting the pH concentration, wherein the fenton oxidation means is divided into multiple stages and sequentially processed under the same operating conditions. do.
이하, 첨부된 도면을 참조하여 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
먼저, 본 발명의 특징을 간단히 설명하면 다음과 같다.First, a brief description of the features of the present invention.
생물학적으로 분해가 어려운 유기물질은 일반적으로 분자량이 약 500 이상으로 성분을 파악하기 어려운 분자량 약 10,000 이상의 유기물질을 다량 포함하고 있다. 이러한 특성을 갖는 고령화된 매립지 침출수나 난분해성 산업폐수는 화학적 응집·침전 공정을 적용하여 우선적으로 분자량 약 10,000 이상의 유기물질을 제거하고, 후단의 펜톤산화공정에서 분자량 약 10,000 이하의 유기물질을 제거하므로써, 펜톤산화공정에 투입되는 화학약품의 양을 감소시키고, 전체적인 처리 시스템의 비용을 절감하며, 난분해성 유기물질이 높은 효율로 제거되어 최종 유출수가 양질의 수질을 나타내도록 하였다.Biologically difficult to decompose organic materials generally have a molecular weight of about 500 or more and contains a large amount of organic materials with a molecular weight of about 10,000 or more difficult to identify components. Aged landfill leachate or hardly decomposable industrial wastewater having these characteristics is applied by chemical flocculation and sedimentation process to remove organic substances with molecular weight of about 10,000 or more first, and by removing organic substances with molecular weight of about 10,000 or less in the subsequent Fenton oxidation process. In addition, the amount of chemicals used in the fenton oxidation process is reduced, the cost of the overall treatment system is reduced, and the hardly decomposable organic substances are removed with high efficiency so that the final effluent shows high quality water.
또한, 펜톤산화조를 다단으로 분할하여 철염과 과산화수소수를 각각에 동일한 양씩 주입하여 유기물질의 제거효율을 향상시켰다.In addition, the fenton oxide tank was divided into multiple stages, and the iron salt and the hydrogen peroxide water were injected in the same amount to each other to improve the removal efficiency of the organic material.
다음, 도 1을 참조하여 본 발명의 난분해성 유기물질 처리공정을 살펴본다.Next, with reference to Figure 1 looks at the process of treatment of degradable organic material of the present invention.
도 1은 본 발명에 따른 난분해성 유기물질 처리장치의 개략적인 구조도로서, 도면에서 1은 급속 교반조, 2는 제 1pH 조정조, 3은 제 1완속교반조, 4는 제 1약품 침전조, 5는 펜톤산화조, 6은 제 2pH 조정조, 7은 제 2완속 교반조, 8은 제 2약품 침전조를 각각 나타낸다.1 is a schematic structural diagram of an apparatus for treating hardly decomposable organic substances according to the present invention, in which 1 is a rapid stirring tank, 2 is a first pH adjusting tank, 3 is a first slow stirring tank, 4 is a first chemical precipitation tank, and 5 is a Fenton oxidation tank, 6 is a 2nd pH adjustment tank, 7 is a 2nd slow stirring tank, 8 is a 2nd chemical precipitation tank, respectively.
본 발명은 크게 응집제를 투여하여 화학적 응집 침전단계와 펜톤산화단계, 펜톤산화시 발생되는 철염을 응집 침전시키는 철염 응집침전단계로 이루어진다.The present invention consists of an iron salt coagulation precipitation step of coagulating and precipitating iron salts generated during chemical coagulation precipitation step, fenton oxidation step, and fenton oxidation by administering a coagulant.
화학적 응집침전단계는 크게 4개의 반응조로 구성된다. 우선 급속교반조(1)에서는 응집제로 염화제 2철(FeCl3)을 투입하고, 약 450 rpm의 속도로 약 15분간 급속히 교반하면서 폐수내의 유기물질과 응집제와의 접촉을 높인다.The chemical flocculation sedimentation step consists of four reactors. First, in the rapid stirring tank 1, ferric chloride (FeCl 3 ) is added as a flocculant, and the contact between organic substances and the flocculant in the wastewater is increased while rapidly stirring for about 15 minutes at a speed of about 450 rpm.
그리고, 급속교반조(1)에서 처리된 폐수는 제 1pH 조정조(2)로 유입되어 수산화나트륨(NaOH)과 황산(H2SO4)을 이용하여 가장 효율이 높은 조건인 약 pH 5 정도로 pH 농도가 조절된다. 이 때, 교반속도는 약 300rpm이며, 체류시간은 약 30분정도이다.In addition, the wastewater treated in the rapid stirring tank 1 flows into the first pH control tank 2, and the pH concentration is about pH 5, which is the most efficient condition using sodium hydroxide (NaOH) and sulfuric acid (H 2 SO 4 ). Is adjusted. At this time, the stirring speed is about 300rpm, and the residence time is about 30 minutes.
제 1pH 조정조(2)에 의해 pH 농도가 조절된 폐수는 제 1완속교반조(3)로 유입되어 교반속도 약 20rpm에서 체류시간 약 20분 동안 침전성이 높아지도록 입자 크기가 증가된 후, 제 1약품 침전조(4)에 의해 응집된 입자가 침전된다.The wastewater whose pH concentration is adjusted by the first pH adjusting tank 2 is introduced into the first slow stirring tank 3 and the particle size is increased to increase the settling property for a residence time of about 20 minutes at a stirring speed of about 20 rpm. Agglomerated particles are precipitated by the single chemical precipitation tank 4.
화학적 응집침전 반응을 여러 운전조건으로 실험한 결과, 상기 제시한 조건에서 분자량 500이상의 유기물질이 95%이상 제거되었다.As a result of experiments on the chemical flocculation reaction under various operating conditions, 95% or more of the organic material having a molecular weight of 500 or more was removed under the above conditions.
전술한 바와 같은 화학적 응집침전 단계가 수행된 폐수는 산화제로 과산화수소(H2O2)와 촉매로 황산철염(FeSO4)이 투입되는 펜톤산화조(5)로 유입된다. 여기서, 약품투입시 여러 조건실험을 통한 결과 두 물질의 최적비 1:1.25(무게비)를 얻었다.The wastewater subjected to the chemical flocculation sedimentation step as described above is introduced into the Fenton oxidation tank 5 into which hydrogen peroxide (H 2 O 2 ) is used as an oxidant and ferric sulfate (FeSO 4 ) is introduced as a catalyst. Here, the optimum ratio 1: 1.25 (weight ratio) of the two substances was obtained as a result of various conditions during the chemical injection.
펜톤산화조(5)는 도 2에 도시된 바와 같이 두 개의 단으로 분할되며, 각 단의 동작은 동일하다. 즉, 각 단의 펜톤산화조에 관산화수소수와 황산철염을 전체투입양의 1/2씩을 각각 분할하여 주입시킨다.Fenton oxidation tank 5 is divided into two stages, as shown in Figure 2, the operation of each stage is the same. In other words, the hydrogen peroxide water and ferric sulfate are each divided into 1/2 of the total injection amount into the Fenton oxidation tank at each stage.
그리고, 각 단의 펜톤산화조는 교반속도 약 200rpm, 체류시간 약 30분동안 각각 교반되며, pH농도 약 2 내지 3정도가 바람직하다. 다시말해, 본 발명에서는 펜톤산화조를 두 개의 단으로 분할하여 먼저 전단의 펜톤산화조에 과산화수소와 황산철염을 전체투입양의 1/2을 주입하고, 교반속도 약 200rpm으로 약 30분동안 교반한다.In addition, the fenton oxidation tank of each stage is stirred for about 200 rpm and a residence time of about 30 minutes, respectively, and a pH of about 2-3 is preferable. In other words, in the present invention, the Fenton oxidation tank is divided into two stages, and first, half of the total amount of hydrogen peroxide and iron sulfate are injected into the Fenton oxidation tank at the front end, and stirred at about 200 rpm for about 30 minutes.
그리고, 이렇게 처리된 폐수는 후단의 펜톤산화조로 유입되고, 후단의 펜톤산화조도 전단의 펜톤산화조와 동일한 동작을 수행한다.Then, the wastewater treated in this way is introduced into the Fenton oxidation tank at the rear stage, and the Fenton oxidation tank at the rear stage performs the same operation as the Fenton oxidation tank at the front stage.
이렇게 펜톤산화조에 의해 산화된 폐수는 이후 제 2pH 조정조(6)와 제 2완속교반조(7), 제 2약품침전조(8)에 의해 촉매로 이용된 황산철염(FeSO4)이 침전되어 제거된다.The waste water oxidized by the Fenton oxidation tank is then removed by precipitation of ferric sulfate (FeSO 4 ) used as a catalyst by the second pH adjusting tank 6, the second slow stirring tank 7, and the second chemical precipitation tank 8. .
이후의 철염 응집침전단계에서는 화학적 응집침전과는 달리 응집제를 투여하지 않으며, 최적 pH농도는 수산화나트륨을 이용하여 약 pH 8로 조절한다.In the subsequent iron salt coagulation sedimentation step, unlike chemical coagulation sedimentation, no coagulant is administered, and the optimum pH concentration is adjusted to about pH 8 using sodium hydroxide.
또한, 제 2완속교반조(7)와 제 2약품침전조(8)의 동작 조건은 화학적 응집침전 단계의 제 1완속교반조(3)와 제 1약품침전조의 동작 조건과 동일하다.Further, the operating conditions of the second slow stirring tank 7 and the second chemical precipitation tank 8 are the same as the operating conditions of the first slow stirring tank 3 and the first chemical precipitation tank in the chemical flocculation precipitation step.
상기와 같이 이루어지는 본 발명은 펜톤산화공정을 전단과 후단으로 나누어 처리함으로써, 고령화된 매립지의 침출수나 산업폐수에 포함되어 있는 분자량 500 이상의 난분해성 유기물질이 총유기탄소(TOC)를 기준으로 95%이상 처리되어 종래의 방법에 비해 유기물질 제거효율이 약 14%정도 향상되었다.According to the present invention, the Fenton oxidation process is divided into a front end and a rear end, so that a hardly decomposable organic substance having a molecular weight of 500 or more contained in an leachate or an industrial wastewater of an aged landfill is 95% based on TOC. As a result, the organic material removal efficiency was improved by about 14% compared to the conventional method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970061474A KR19990040953A (en) | 1997-11-20 | 1997-11-20 | Refractory organic material processing device with multi-stage oxidation tank |
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| Publication Number | Publication Date |
|---|---|
| KR19990040953A true KR19990040953A (en) | 1999-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019970061474A KR19990040953A (en) | 1997-11-20 | 1997-11-20 | Refractory organic material processing device with multi-stage oxidation tank |
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| Country | Link |
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| KR (1) | KR19990040953A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100375292B1 (en) * | 1999-12-09 | 2003-03-10 | 주식회사 엔비로 | A disposal mathod of wastewater repeating oxidation and neutralization reaction |
| US20130168325A1 (en) * | 2011-12-30 | 2013-07-04 | Kyung Guen Song | Apparatus for phosphorous removal from waste water |
-
1997
- 1997-11-20 KR KR1019970061474A patent/KR19990040953A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100375292B1 (en) * | 1999-12-09 | 2003-03-10 | 주식회사 엔비로 | A disposal mathod of wastewater repeating oxidation and neutralization reaction |
| US20130168325A1 (en) * | 2011-12-30 | 2013-07-04 | Kyung Guen Song | Apparatus for phosphorous removal from waste water |
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