KR20020075513A - The waste water treatment method using electrolysis - Google Patents

The waste water treatment method using electrolysis Download PDF

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KR20020075513A
KR20020075513A KR1020010015490A KR20010015490A KR20020075513A KR 20020075513 A KR20020075513 A KR 20020075513A KR 1020010015490 A KR1020010015490 A KR 1020010015490A KR 20010015490 A KR20010015490 A KR 20010015490A KR 20020075513 A KR20020075513 A KR 20020075513A
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wastewater
electrolysis
treatment method
metal salts
ions generated
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조용덕
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조용덕
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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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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

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  • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

PURPOSE: A dyeing wastewater treatment method using electrolysis is provided to treat dyeing wastewater by decomposing organic materials including recalcitrant wastewater to a high speed using electrolysis oxidation. CONSTITUTION: In a dyeing wastewater treatment method using electrolysis comprising the steps of adding metal salts containing chlorine to wastewater, adjusting pH of the wastewater, electrically oxidizing the pH adjusted wastewater in an electrolytic cell in which titanium anode electrodes and stainless steel cathode electrodes are installed, and purifying wastewater through an ordinary process, the dyeing wastewater treatment method is characterized in that the metal salts containing chlorine are materials that are precipitated by bonding metallic ions generated from the metal salts with hydroxyl ions generated during the electrical oxidation, wherein the metal salts are BaCl2, CaCl2, or MgCl2.

Description

전기분해법을 이용한 폐수의 처리방법{The waste water treatment method using electrolysis}The waste water treatment method using electrolysis

본 발명은 전기분해 산화법을 이용한 염료폐수의 처리방법에 관한 것으로, 보다 상세하게는 전기분해 산화법을 이용하여 난분해성 폐수를 포함하는 유기물질을 고속으로 분해하여 처리할 수 있도록 한 전기분해법을 이용한 폐수의 처리방법에 관한 것이다.The present invention relates to a method for treating dye wastewater using an electrolytic oxidation method, and more particularly, wastewater using an electrolysis method for treating organic materials including hardly decomposable wastewater at high speed using an electrolytic oxidation method. It relates to the treatment method of.

산업화가 급격하게 진전을 보이면서 최근들어 각종 공장에서 배출되는 산업폐수의 양 또한 증가하고 있다. 이렇게 각종 공장에서 발생하는 폐수는 인체에 유해한 중금속 및 각종 유독성 유기물질을 함유하고 있어 심각한 사회문제로 대두되고 있다. 이에 따라 폐수처리에 대한 많은 연구가 진행되고 있으나 산업폐수의 종류가 다양하고 난분해성 유기물질을 함유한 경우가 대부분이기 때문에 이들을 정화처리하는데 많은 어려움이 있다.With the rapid progress of industrialization, the amount of industrial wastewater discharged from various factories has recently increased. Wastewater from various factories contains heavy metals and various toxic organic substances that are harmful to the human body. Accordingly, many researches on wastewater treatment have been conducted, but there are many difficulties in purifying the wastewater since industrial wastewaters are various and contain most of hardly decomposable organic substances.

상기 폐수처리방법으로는 통상적인 생물학적 처리와 함께 여러가지 물리적 및 화학적인 처리방법을 병행하여 실시하는 것이 일반적이다. 그러나 점차 폐수의 구성성분이 복잡해지고 농도가 높아짐에 따라 물리화학적인 처리방법의 비중이 증가하고 있는 추세이다. 특히, 최근에는 전기분해법을 이용하여 폐수를 산화처리하는 기술이 크게 주목을 받고 있으며, 가장 유용한 방법으로 폐수에 함유되어 있거나 혹은 외부에서 첨가한 염화나트륨을 전기분해함으로써 생성된 강력한 산화제인 차아염소산(OCl)을 이용하여 폐수중의 유기물질을 효과적으로 분해시키는 것에 관한 기술이 공지되어 있다.As the wastewater treatment method, it is common to carry out various physical and chemical treatment methods in parallel with the conventional biological treatment. However, as the constituents of wastewater become more complicated and the concentrations increase, the proportion of physicochemical treatment methods is increasing. In particular, recently, the technique of oxidizing wastewater by electrolysis has attracted much attention, and the most useful method is hypochlorous acid (OCl), a powerful oxidant produced by electrolyzing sodium chloride contained in wastewater or added externally. A technique for effectively decomposing organic matter in wastewater using a) is known.

상기 공지기술로 국내 특허출원번호 제93-6292호에서는 폐수에 염화나트륨을 10중량% 이하 첨가한 다음 페수의 pH를 4 내지 10으로 조절하여 티타늄 양극전극과 스테인레스강 음극전극이 설치된 전해조에서 1 내지 200㎃/㎠의 전류밀도로 전기산화처리함으로서 COD의 함량을 40% 내지 95%가량 제거가 가능하고 탈색 및 탈취효과를 볼 수 있는 기술을 개시하고 있다.In Korean Patent Application No. 93-6292 according to the above known technique, sodium chloride is added to the wastewater by 10 wt% or less, and then the pH of the wastewater is adjusted to 4 to 10. By electrooxidizing at a current density of ㎃ / ㎠ it is possible to remove the COD content of about 40% to 95% and discloses a technology that can see the decoloring and deodorizing effect.

또 국내 특허출원번호 제94-4217호에서는 염화나트륨 용액을 백금족원소 산화막이 코팅된 티타늄전극으로 이루어진 양극과 스테인레스강 전극으로 이루어진 음극으로 구성된 전해조에서 전기분해하는 공정과, 상기 공정에서 전기분해된 염화나트륨 용액에 폐수를 일정 부피비로 혼합한 후 교반하는 공정과, 상기 공정에서 교반이 완료된 처리수를 침전 여과하는 공정과, 상기 공정에서 여과처리된 처리수의 일부는 상기 전해조로 재순환시켜 염화나트륨 용액제조에 사용하고 나머지는 방류하는 공정으로 이루어진 난분해성 산업폐수의 전기산화분해방법에 대한 기술을 공개하고 있다.In addition, Korean Patent Application No. 94-4217 discloses a process of electrolyzing a sodium chloride solution in an electrolytic cell composed of an anode composed of a titanium electrode coated with a platinum group element oxide film and a cathode composed of a stainless steel electrode, and a sodium chloride solution electrolyzed in the process. And mixing the wastewater in a predetermined volume ratio, and stirring and filtering the treated water which has been stirred in the process, and part of the treated water filtered in the process is recycled to the electrolytic cell for use in the production of sodium chloride solution. The rest discloses a technique for the electrooxidation of hardly decomposable industrial wastewater consisting of a discharge process.

상기 공지기술들의 원리를 보다 상세하게 설명하면 다음과 같다.Referring to the principle of the known techniques in more detail as follows.

상기 염화나트륨 용액을 전기분해한 경우 양극에서는 염소가스가, 또한 음극에서는 수소가스와 함께 수산기가 발생하며 이때 염소가스와 수산기가 화학반응을 일으켜 산화력이 강한 차아염소산 이온을 생성시킨다. 전체 반응을 하기 반응식 1에 나타내었다.When the sodium chloride solution is electrolyzed, a hydroxyl group is generated together with chlorine gas at the anode and hydrogen gas at the cathode. At this time, the chlorine gas and the hydroxyl group react with each other to generate a strong hypochlorite ion. The overall reaction is shown in Scheme 1 below.

2NaCl + 4H2O + 2e-→ 2NaOH + 2ClO-+ 3H2↑ 2NaCl + 4H 2 O + 2e - → 2NaOH + 2ClO - + 3H 2 ↑

상기 반응식 1에서 보는 바와 같이 전기분해 결과로 형성된 차아염소산 이온은 강력한 산화력을 가지고 있어 폐수속에 함유된 난분해성 물질을 포함한 각종 유기물질을 분해하여 정화하게 된다.As shown in Scheme 1, hypochlorite ions formed as a result of electrolysis have a strong oxidizing power and decompose and purify various organic materials including hardly decomposable substances contained in wastewater.

그러나 상기 반응식 1에서 정방향으로 진행되는 속도는 초기에 매우 빠르게 진행되고 이후 시간이 지남에 따라 점차 느려지게 된다. 그 이유는 생성된 수산화나트륨의 량이 점차 증가하기 때문이다. 따라서 초기 난분해성 물질의 제거속도는 매우 빠르게 진행되나 이후 점차 제거속도가 완만하게 진행되어 산화시간이 매우 길어지게 되고 따라서 폐수처리량에 한계가 있으며 유지관리 비용이 증가되는 단점이 있다.However, the speed that proceeds in the forward direction in Scheme 1 is very fast initially and then gradually slows down over time. The reason is that the amount of sodium hydroxide produced gradually increases. Therefore, the removal rate of the initial hardly decomposable material proceeds very fast, but gradually the removal speed progresses gradually, and thus the oxidation time becomes very long, thus, the wastewater treatment capacity is limited and the maintenance cost is increased.

따라서 본 발명은 전기분해 산화법을 이용하여 난분해성 폐수를 포함하는 유기물질을 고속으로 분해하여 처리할 수 있도록 한 전기분해법을 이용한 폐수의 처리방법을 제공하는데 그 목적이 있다.Accordingly, an object of the present invention is to provide a method for treating wastewater using an electrolysis method in which organic materials including hardly decomposable wastewater are decomposed and processed at high speed using an electrolytic oxidation method.

상기한 목적을 달성하기 위하여 본 발명은The present invention to achieve the above object

폐수에 염소를 함유하는 금속염을 첨가한 다음 폐수의 pH를 조절하여 티타늄 양극전극과 스테인레스강 음극전극이 설치된 전해조에서 전기산화처리한 다음 통상적인 방법을 거쳐 폐수를 정화처리하는 전기분해법을 이용한 폐수의 처리방법에 있어서,After adding chlorine-containing metal salts to the wastewater, the pH of the wastewater is adjusted, followed by electrooxidation in an electrolytic cell equipped with a titanium anode electrode and a stainless steel cathode electrode, followed by a conventional method to purify the wastewater. In the treatment method,

상기 염소를 함유하는 금속염이 금속염에서 발생되는 금속이온과 전기산화처리시 발생하는 수산화이온이 결합하여 침전을 형성하는 물질인 것을 특징으로 하는 전기분해법을 이용한 폐수의 처리방법을 제공함으로서 달성할 수 있다.The chlorine-containing metal salt may be achieved by providing a method for treating wastewater using an electrolysis method, characterized in that the metal ion generated from the metal salt and the hydroxide ion generated during the electrooxidation process form a precipitate. .

이하 본 발명에 의한 전기분해법을 이용한 폐수의 처리방법을 보다 상세하게 설명한다.Hereinafter, the wastewater treatment method using the electrolysis method according to the present invention will be described in more detail.

본 발명에서는 통상의 티타늄 양극전극과 스테인레스강 음극전극이 설치된 전해조에서 폐수를 산화처리하여 정화하게 된다. 이때 종래 염소를 함유하는 금속염으로 염화나트륨을 첨가하는 대신 금속염에서 발생하는 금속이온과 전기산화처리시 발생하는 수산화이온이 결합하여 침전을 형성할 수 있는 물질을 첨가하게 된다.In the present invention, the waste water is oxidized and purified in an electrolytic cell equipped with a conventional titanium anode electrode and a stainless steel cathode electrode. In this case, instead of adding sodium chloride as a metal salt containing chlorine, a substance capable of forming a precipitate by combining metal ions generated from the metal salt and hydroxide ions generated during the electrooxidation treatment is added.

이때 상기 수산화이온과 결합하여 침전을 형성할 수 있는 물질로는 BaCl2, CaCl2또는 MgCl2등이 있다.At this time, the material that can form a precipitate by combining with the hydroxide ions include BaCl 2 , CaCl 2 or MgCl 2 .

일예로 CaCl2를 첨가할 경우 상기 염화칼슘 용액을 전기분해할 경우 양극에서는 염소가스가, 또한 음극에서는 수소가스와 함께 수산기가 발생하며 이때 염소가스와 수산기가 화학반응을 일으켜 산화력이 강한 차아염소산 이온을 생성시킨다.이때 전기분해의 결과로 생성된 칼슘이온은 산화처리과정에서 발생하는 수산화이온과 결합하여 침전물을 형성하게 된다. 전체 반응을 하기 반응식 2에 나타내었다.For example, when CaCl 2 is added, when the electrolysis of the calcium chloride solution is carried out, a hydroxyl group is generated together with chlorine gas at the positive electrode and hydrogen gas at the negative electrode. At this time, the calcium ions generated as a result of the electrolysis combine with the hydroxide ions generated during the oxidation treatment to form a precipitate. The overall reaction is shown in Scheme 2 below.

CaCl2+ 4H2O + 2e-→ Ca(OH)2↓+ 2ClO-+ 3H2↑ CaCl 2 + 4H 2 O + 2e - → Ca (OH) 2 ↓ + 2ClO - + 3H 2 ↑

또 MgCl2를 첨가할 경우 역시 동일한 결과를 얻을 수 있으며, 전체 반응을 하기 반응식 3에 나타내었다.In addition, the same result can be obtained when MgCl 2 is added, and the entire reaction is shown in Scheme 3 below.

MgCl2+ 4H2O + 2e-→ Mg(OH)2↓+ 2ClO-+ 3H2↑ MgCl 2 + 4H 2 O + 2e - → Mg (OH) 2 ↓ + 2ClO - + 3H 2 ↑

상기 반응식 2와 3에서 보는 바와 같이 전기분해 결과로 형성된 차아염소산 이온은 강력한 산화력을 가지고 있어 폐수속에 함유된 난분해성 물질을 포함한 각종 유기물질을 분해하여 정화하게 된다.As shown in Schemes 2 and 3, hypochlorite ions formed as a result of electrolysis have a strong oxidizing power and decompose and purify various organic substances including hardly decomposable substances contained in waste water.

이때 칼슘이온은 수산화 이온과 결합하여 Ca(OH)2나 Mg(OH)2의 형태로 침전물을 형성하게 된다. 그에 따라 정방향의 반응속도는 초기의 반응속도를 그대로 유지할 수 있게 되어 산화처리시간이 매우 단축되게 된다. 즉, 수소기체의 발생과 더불어 침전물의 형성으로 인하여 정반응이 촉진되어 차염소산의 생성량이 많아짐에 따라 짧은시간내에 폐수에 함유된 유기물질을 산화시켜 정화할 수 있게 된다.At this time, calcium ions are combined with hydroxide ions to form a precipitate in the form of Ca (OH) 2 or Mg (OH) 2 . Accordingly, the reaction rate in the forward direction can maintain the initial reaction rate as it is, and the oxidation treatment time is very shortened. That is, due to the generation of hydrogen gas and the formation of sediment, the positive reaction is accelerated, and the amount of hypochlorous acid is increased, thereby oxidizing and purifying organic substances contained in the wastewater within a short time.

즉, 폐수내에 함유되어 있는 유기물질을 효율적으로 분해하여 COD의 함량을 단시간 내에 허용기준치인 100ppm이하로 할 수 있으며, 탈색 및 탈취효과를 볼 수있다는 장점이 있다.In other words, by effectively decomposing the organic substances contained in the waste water, the content of COD can be less than 100ppm, which is an acceptable standard within a short time, and has the advantage of being able to see the decoloring and deodorizing effect.

또한, 본 발명에 의한 산화처리방법을 다른 종래의 폐수처리방법과 접목시킬 경우 그 처리효율을 극대화시킬 수 있다. 즉, 약품을 첨가하여 부유물질을 제거함과 동시에 폐수속에 함유되어 있는 난분해성 유기물을 함께 처리하고자 할 경우 적은량의 약품으로도 충분한 부유물질 제거효과를 볼 수 있다. 이것은 본 발명에 의한 금속물질이 수산화이온과 결합하여 침전물 형성시 부유물질과 함께 침전됨으로서 적은량의 약품을 투입하여도 충분한 부유물질 제거 효과를 볼 수 있는 것이다. 일예로 종래 일반적으로 시행하는 펜토산화법에 본 발명의 전기분해 산화법을 접목시킬 경우 약품 투입량을 절반이하로 줄일 수 있을 뿐만 아니라 단시간내에 산화처리를 할 수 있어 정화처리 효율을 극대화시킬 수 있게 된다.In addition, when the oxidation treatment method according to the present invention is combined with other conventional wastewater treatment method it can maximize the treatment efficiency. In other words, if a chemical is added to remove the suspended solids and at the same time to treat the hardly decomposable organic substances contained in the waste water, a small amount of the chemical can provide sufficient suspended solids removal effect. This is because the metal material according to the present invention is combined with hydroxide ions, and precipitates together with the floating material when forming a precipitate, so that a sufficient amount of floating material can be removed even if a small amount of chemical is added. For example, when the electrolytic oxidation method of the present invention is combined with the pento oxidation method, which is conventionally performed, not only can the chemical input amount be reduced to less than half, but also the oxidation treatment can be performed in a short time to maximize the purification treatment efficiency.

이때 전기산화처리는 통상의 범위에서 pH를 조절한 다음 적량의 염소를 함유하는 금속염을 투입한 다음 통상의 범위내에서 전류를 흘려보내주면 된다. 이와 같이 산화처리를 거친 폐수는 통상적인 폐수처리공정을 거쳐 정화되게 된다.In this case, the electrooxidation treatment may be performed by adjusting the pH in a normal range, then introducing a metal salt containing an appropriate amount of chlorine, and then flowing a current within the normal range. The oxidized wastewater is purified through a conventional wastewater treatment process.

상기와 같이 본 발명에 따라 전기산화처리공정을 통해 폐수처리를 실시할 경우 폐수의 COD농도를 허용기준치로 낮추는데 걸리는 시간은 15분 내지 30분 정도 소요되며, 이것은 기존의 전기산화처리공정을 통해 폐수를 처리하는 방법에 비하여 약 1/10의 시간 절감 효과를 볼 수 있는 것이다.As described above, when the wastewater treatment is performed through the electrooxidation process, the time taken to lower the COD concentration of the wastewater to the allowable standard value is about 15 to 30 minutes, which is the wastewater through the conventional electrooxidation process. Compared to the method of processing the time savings of about 1/10 will be seen.

또한 본 발명에 의한 전기산화처리공정을 거치게 되면 탈색효과를 거둘 수 있으므로, 염료제조공정에서 발생하는 폐수의 정화처리에 유용하게 적용할 수 있다.In addition, since the electrooxidation process according to the present invention can have a decolorizing effect, it can be usefully applied to the purification of wastewater generated in the dye production process.

이하 본 발명을 하기한 실시예를 통하여 보다 상세하게 설명하기로 하나, 이는 본 발명의 이해를 돕기 위하여 제시된 것일 뿐, 본 발명이 하기 설명에 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only presented to aid the understanding of the present invention, and the present invention is not limited to the following description.

<실시예 1><Example 1>

티타늄 양극전극과 스테인레스 음극전극의 극판간격이 10mm로 설치된 통상의 전기촉매 산화조에 염료제조 공정에 따라 배출되는 폐수를 취하여 산화조에 투입한 후 용액의 pH를 4 내지 10으로 조절한 다음, 폐수량에 대하여 5중량%의 염화칼슘을 투입하고, 이를 전류밀도 100㎃/㎠하에서 전기산화분해처리를 실시하였다. 이때 사용된 염료제조 공정에 따라 배출되는 폐수의 COD를 표1에 나타내었으며, 처리후 COD의 허용기준치인 100ppm이하로 될 때까지 걸리는 시간을 측정하여 그 결과를 표1에 나타내었다.After taking the wastewater discharged by the dye production process into a conventional electrocatalyst oxidation tank equipped with a 10 mm gap between the titanium anode electrode and the stainless cathode electrode, the solution is adjusted to 4 to 10 and then the pH of the solution is adjusted. 5 wt% of calcium chloride was added thereto, and subjected to electrooxidation treatment at a current density of 100 mA / cm 2. At this time, the COD of the wastewater discharged according to the dye manufacturing process used is shown in Table 1, and the time taken for the COD to be below 100 ppm, which is the allowable value of COD, was measured and the results are shown in Table 1.

<실시예 2><Example 2>

폐수로 분산성 염료폐수를 사용하고, 염화칼슘 대신 염화마그네슘을 첨가한 것을 제외하고 실시예 1과 동일한 방법으로 실시하였다.The wastewater was used in the same manner as in Example 1 except that dispersible dye wastewater was used and magnesium chloride was added instead of calcium chloride.

<비교예 1>Comparative Example 1

폐수로 분산성 염료폐수를 사용하고, 염화칼슘 대신 염화나트륨을 첨가한 것을 제외하고 실시예 1과 동일한 방법으로 실시하였다.Disperse dye wastewater was used as wastewater, and sodium chloride was added instead of calcium chloride, and the same process as in Example 1 was carried out.

구분division 염료폐수종Dye Waste Species 초기 pHInitial pH 초기 CODInitial COD 처리후 CODCOD after treatment 처리시간(분)Processing time (minutes) 실시예 1Example 1 직접염료Direct dyes 7.27.2 5800ppm5800 ppm 97ppm97 ppm 2323 반응성염료Reactive dyes 8.78.7 6400ppm6400 ppm 94ppm94 ppm 2727 산성염료Acid dyes 2.02.0 4300ppm4300 ppm 87ppm87 ppm 1919 분산성염료Disperse Dyes 10.510.5 4150ppm4150ppm 86ppm86 ppm 1717 실시예 2Example 2 분산성염료Disperse Dyes 10.510.5 4150ppm4150ppm 84ppm84 ppm 1818 비교예 1Comparative Example 1 분산성염료Disperse Dyes 10.510.5 4150ppm4150ppm 99ppm99 ppm 270270

상기 표 1에서 보는 바와 같이 본 발명에 따라 염화칼슘을 첨가한 실시예 1의 경우 COD의 허용기준치인 100ppm이하로 될 때까지 걸리는 시간이 모두 30분 미만으로 나타나 매우 빠르게 정화처리됨을 알 수 있다. 그러나 종래 염화나트륨을 첨가한 비교예 1의 경우 COD의 허용기준치인 100ppm이하로 될 때까지 걸리는 시간이 4시간 가량소요됨에 따라 본 발명에 의한 경우 단시간내에 정화처리가 가능함을 알 수 있다. 또 염화칼슘대신 염화마그네슘을 사용한 실시예 2의 경우 실시예 1과 마찬가지로 COD의 허용기준치인 100ppm이하로 될 때까지 걸리는 시간이 매우 짧은 것을 알 수 있다.As shown in Table 1, in the case of Example 1 to which calcium chloride was added according to the present invention, all of the time required to reach 100 ppm or less, which is the allowable value of COD, was found to be less than 30 minutes, indicating that the purification process was very fast. However, in the case of Comparative Example 1 to which the conventional sodium chloride is added, it takes about 4 hours to reach 100 ppm or less, which is the allowable standard of COD, and according to the present invention, it can be seen that the purification process can be performed within a short time. In addition, in the case of Example 2 using magnesium chloride instead of calcium chloride, it can be seen that the time required to reach 100 ppm or less, which is the allowable standard of COD, is very short.

상기에서 설명한 바와 같이 본 발명은 난분해성 폐수를 포함하는 유기물질을 고속으로 분해하여 처리할 수 있도록 한 전기분해법을 이용한 폐수의 처리방법을 제공하는 유용한 발명이다. 특히, 본 발명에 의한 전기산화처리공정을 거치게 되면 탈색효과를 거둘 수 있으므로, 염료제조공정에서 발생하는 폐수의 정화처리에 유용하게 적용할 수 있다. 또한, 본 발명에 의한 산화처리방법을 다른 종래의 폐수처리방법과 접목시킬 경우 본 발명에 의한 금속물질이 수산화이온과 결합하여 침전물 형성시 부유물질과 함께 침전됨으로서 적은량의 약품을 투입하여도 충분한 부유물질 제거 효과를 볼 수 있다.As described above, the present invention is a useful invention that provides a method for treating wastewater using an electrolysis method in which organic materials including hardly degradable wastewater can be decomposed and processed at high speed. In particular, since the electrooxidation process according to the present invention can achieve a decolorizing effect, it can be usefully applied to the purification of wastewater generated in the dye production process. In addition, when the oxidation treatment method according to the present invention is combined with other conventional wastewater treatment methods, the metal material according to the present invention is combined with hydroxide ions and precipitates together with the floating material when the precipitate is formed. Material removal effect can be seen.

Claims (2)

폐수에 염소를 함유하는 금속염을 첨가한 다음 폐수의 pH를 조절하여 티타늄 양극전극과 스테인레스강 음극전극이 설치된 전해조에서 전기산화처리한 다음 통상적인 방법을 거쳐 폐수를 정화처리하는 전기분해법을 이용한 폐수의 처리방법에 있어서,After adding chlorine-containing metal salts to the wastewater, the pH of the wastewater is adjusted, followed by electrooxidation in an electrolytic cell equipped with a titanium anode electrode and a stainless steel cathode electrode, followed by a conventional method to purify the wastewater. In the treatment method, 상기 염소를 함유하는 금속염이 금속염에서 발생되는 금속이온과 전기산화처리시 발생하는 수산화이온이 결합하여 침전을 형성하는 물질인 것을 특징으로 하는 전기분해법을 이용한 폐수의 처리방법.And a metal salt containing chlorine is a substance in which metal ions generated from metal salts and hydroxide ions generated during electrooxidation are combined to form precipitates. 제 1항에 있어서, 상기 금속염이 BaCl2, CaCl2또는 MgCl2인 것을 특징으로 하는 전기분해법을 이용한 폐수의 처리방법.The method of claim 1, wherein the metal salt is BaCl 2 , CaCl 2 or MgCl 2 .
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US9377194B2 (en) 2012-05-21 2016-06-28 Jin Il Kim Scrubber
CN107200382A (en) * 2017-05-19 2017-09-26 河海大学 A kind of dyeing waste water without sludge deep processing method

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