[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR20090067970A - Method for treatment of wastewater containing cyanide - Google Patents

Method for treatment of wastewater containing cyanide Download PDF

Info

Publication number
KR20090067970A
KR20090067970A KR1020070135812A KR20070135812A KR20090067970A KR 20090067970 A KR20090067970 A KR 20090067970A KR 1020070135812 A KR1020070135812 A KR 1020070135812A KR 20070135812 A KR20070135812 A KR 20070135812A KR 20090067970 A KR20090067970 A KR 20090067970A
Authority
KR
South Korea
Prior art keywords
wastewater
cyanide
acid
containing wastewater
cyan
Prior art date
Application number
KR1020070135812A
Other languages
Korean (ko)
Other versions
KR101420656B1 (en
Inventor
김시환
Original Assignee
재단법인 포항산업과학연구원
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 재단법인 포항산업과학연구원 filed Critical 재단법인 포항산업과학연구원
Priority to KR1020070135812A priority Critical patent/KR101420656B1/en
Publication of KR20090067970A publication Critical patent/KR20090067970A/en
Application granted granted Critical
Publication of KR101420656B1 publication Critical patent/KR101420656B1/en

Links

Images

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
    • 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
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • 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
    • C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

A method for treating cyanide-containing wastewater is provided to treat acid wastewater and cyanide-containing wastewater all together by treating the cyanide-containing wastewater with high concentration acid wastewater containing a large amount of iron ion generated from the electroplating process. A method for treating cyanide-containing wastewater comprises the steps of: injecting acid wastewater generated from the electroplating process into cyanide-containing wastewater through a flow pipe(10); and injecting a flocculant into the mixture to flocculate and settle the mixture. The acid wastewater generated from the electroplating process contains 5,000 to 10,000 ppm of iron and 20,000 to 50,000 ppm of HCl and has a pH range of 0.1 to 0.5. The acid wastewater generated from the electroplating process is added to the cyanide-containing wastewater in the amount of 1 to 10 mL per 1 ppm of cyanide. The cyanide-containing wastewater is cyanide-containing wastewater generated from the ironmaking process.

Description

시안 함유 폐수 처리 방법{Method for treatment of wastewater containing cyanide}Method for treatment of wastewater containing cyanide}

본 발명은 시안 함유 폐수 처리 방법에 관한 것으로, 보다 상세하게는 전기도금 공정으로부터 발생되는 산폐수를 재활용하여 시안 함유 폐수를 처리함으로써 산폐수와 시안 함유 폐수를 동시에 처리할 수 있는 방법에 관한 것이다.The present invention relates to a method for treating cyanide-containing wastewater, and more particularly, to a method for treating acid and cyanide-containing wastewater simultaneously by recycling acid wastewater generated from an electroplating process to treat cyanine-containing wastewater.

일반적으로 전기도금공장에서는 열연코일을 소재로 하여 산세, 냉간압연, 전기청정, 소둔 및 도금공정을 통하여 미려한 냉연 및 도금제품을 생산한다.In general, electroplating factories produce beautiful cold rolled and plated products using hot rolled coils through pickling, cold rolling, electrocleaning, annealing, and plating processes.

도금공장에서 발생되는 폐수는 대부분 산세 공정에서 발생된 폐수이며 다른 산업폐수와는 달리 다량의 철을 포함하고 있으며 산을 사용하기 때문에 pH가 1 - 2로 매우 낮다. 따라서 도금폐수처리 공정에서 이들 다량의 금속이온의 처리 및 pH를 높이기 위한 방법으로 종래에는 화학적인 방법으로 pH 조정제 및 응집제로 소석회 등을 사용하여 pH를 중성이상으로 맞춘 후 응집, 침전방법으로 금속이온을 제거하여 배출시키고 있으며, 미국 특허 62704255, 60305781 및 64910639에 의하면 역 삼투압방법 및 이온교환방법으로 도금폐수에서부터 금속이온을 제거하는 방법 등이 알려져 있으나 이들 방법들은 단지 도금폐수에 있어서 금속이온의 제거만을 위한 방법이며 특히 이온교환방법에 있어서는 효율적으로 처리할 수 있는 범위가 제한적이다. 그리고 응집, 침전에 의한 방법에서는 금속이온의 제거 효율을 증가시키기 위하여 pH를 중성 이상으로 관리하고 있기 때문에 그 사용량에 있어 금속이온의 양보다 과량으로 사용하고 있다.Most of the wastewater from the plating plant is generated from the pickling process. Unlike other industrial wastewater, the wastewater contains a large amount of iron and has a very low pH of 1-2 due to the use of acid. Therefore, in the plating wastewater treatment process, a large amount of metal ions are treated as a method of increasing the pH, and conventionally, the pH is neutralized using a pH adjuster and a coagulant as a calcining agent by a chemical method, and then the metal ions are coagulated and precipitated. And US Patents 62704255, 60305781 and 64910639 are known to remove metal ions from the plating wastewater by reverse osmosis and ion exchange, but these methods only remove metal ions from the plating wastewater. In particular, in the ion exchange method, the range that can be efficiently processed is limited. In the method of flocculation and precipitation, the pH is controlled to be neutral or higher to increase the removal efficiency of the metal ions. Therefore, the amount is used in excess of the amount of the metal ions.

따라서 종래의 처리방법에 의하면 이들 처리 공정의 부산물인 슬러지가 다량으로 발생되어 슬러지 및 2차 오염물질의 발생으로 도금폐수의 처리에 소모되는 처리비용이 상당히 많이 소요되고 있으며 활용성도 상당히 제한적이다.Therefore, according to the conventional treatment method, a large amount of sludge, which is a by-product of these treatments, is generated, and the treatment cost for treating the plating wastewater due to the generation of sludge and secondary pollutants is considerably high, and the utilization is also very limited.

또한 제철공정 중 발생되는 시안함유폐수에는 다량의 시안을 함유하고 있으며 이러한 폐수에 존재하는 시안화합물은 금속과 결합되어 있는 철-시안화합물과 프리 시안으로 구성되어 있다. 프리 시안의 경우는 맹독성이고 극히 소량으로도 인체에 치명적인 영향을 끼치게되어 수질보전법으로 엄격히 관리되고 있으며 이에 대한 철저한 정화처리가 요구된다. 시안의 정화처리 방법에는 알카리염소법, 전해산화법, 이온교환법, 철착염법, 통기법, 오존산화법, 시안히드린법 등의 여러 방법이 개발되었으며, 특히 프리 시안 함유 폐수는 상기 처리방법 중 주로 알칼리 염소법이 사용되고 있는 추세이다. 이러한 알칼리 염소법은 강력한 산화제를 이용해 알칼리성 용액중에서 시안을 산화 분해하는 방법이다. 이 경우에는 산화제로서 염소나 차아염소산 나트륨이 사용되며, 안전상 차아염소산 나트륨이 주로 사용된다. In addition, cyanide-containing wastewater generated during the steelmaking process contains a large amount of cyanide, and the cyanide compounds present in the wastewater consist of iron-cyanide compounds and free cyanide combined with metals. Frisian is highly toxic and has a fatal effect on the human body even in very small amounts. It is strictly managed by the Water Quality Conservation Act. Various methods such as alkali chlorine method, electrolytic oxidation method, ion exchange method, iron salt method, aeration method, ozone oxidation method and cyanhydrin method have been developed as cyanide purification methods. The law is in use. This alkaline chlorine method is a method of oxidatively decomposing cyanide in an alkaline solution using a powerful oxidizing agent. In this case, chlorine or sodium hypochlorite is used as the oxidizing agent, and sodium hypochlorite is mainly used for safety reasons.

특히, 제철 공정 중 발생하는 시안함유폐수는 금속과 결합되어 있어 상기와 같은 처리법과는 달리 주로 철 착염법을 사용하고 있다. 착염법에 의한 시안화합물의 제거반응은 다음과 같다.In particular, cyanide-containing wastewater generated during the steelmaking process is mainly combined with a metal, and thus, iron complex salt method is mainly used unlike the above treatment method. Removal reaction of cyanide compound by complex salt method is as follows.

6KCN + FeSO4 → K4Fe(CN)5 + 4Fe+2 → Fe4[Fe(CN)6]3 6KCN + FeSO 4 → K 4 Fe (CN) 5 + 4Fe +2 → Fe 4 [Fe (CN) 6 ] 3

Fe4[Fe(CN)6]3 + 응집제 → 침전제거Fe 4 [Fe (CN) 6 ] 3 + Flocculant → precipitation

이러한 철 착염법에서는 황산철 혹은 염화철을 주로 사용하여 착염시킨 뒤 응집제를 이용하여 응집, 침전으로 시안화합물을 제거하고 있어 유독한 화학물질을 첨가하여 시안을 제거하게 되므로 환경에 유해한 유독물질이 배출될 수 있는 문제점이 있다. In the iron complexing method, iron sulfate or iron chloride is used to complex the salt, and then cyanide compounds are removed by flocculation and precipitation using a flocculant. Therefore, cyanide is removed by adding toxic chemicals. There is a problem that can be.

이에 본 발명은 상기와 같은 제반 문제점을 감안하여 이를 해소하고자 하는 것으로, 전기도금 공정에서 발생되는 다량의 철이온이 함유되어 있는 고농도 산폐수를 시안함유폐수에 투입하여 처리함으로써 산폐수 및 시안함유폐수를 동시에 처리할 수 있는 처리방법을 제공하려는 것이다.In view of the above problems, the present invention is intended to solve this problem. The wastewater and the cyanide-containing wastewater are treated by putting high concentration acidic wastewater containing a large amount of iron ions generated in the electroplating process into cyanide-containing wastewater. It is to provide a processing method that can handle the same time.

본 발명의 일 견지에 의하면, 전기도금 공정으로부터 발생되는 산폐수를 시안 함유 폐수에 투입하는 단계; 및 응집제를 투입하여 응집 및 침전시키는 단계를 포함하는 것을 특징으로 하는 시안 함유 폐수 처리 방법이 제공된다.According to one aspect of the invention, the step of the acid wastewater generated from the electroplating process to the cyan-containing wastewater; And it provides a cyan-containing wastewater treatment method comprising the step of agglomerating and precipitation by adding a flocculant.

본 발명에 따르면, 전기 도금 공정에서 발생되는 다량의 철이온이 함유되어 있는 고농도 산폐수를 재활용하여 시안 함유 폐수를 처리함으로써 산폐수 및 시안 함유 폐수를 동시에 처리할 수 있다.According to the present invention, by treating the cyanide-containing wastewater by recycling high concentration acid wastewater containing a large amount of iron ions generated in the electroplating process, it is possible to simultaneously treat the acid and cyanide-containing wastewater.

본 발명자는 시안 함유 폐수의 처리방법으로 산화제를 이용하는 종래 방법보다 전기 도금 공정에서 발생되는 철 성분이 다량 함유되어 있는 고농도의 즉, HCl 및 Fe가 고농도로 존재하는 산폐수를 이용하여 처리하는 방법이 산폐수 처리 및 시안 함유 폐수 처리를 동시에 수행할 수 있어 보다 효율적임을 발견하여 본 발명을 완성하기에 이르렀다. The present invention is a method for treating wastewater containing cyanide containing high concentrations of iron components, i.e., HCl and Fe, which are present in high concentrations. Acid wastewater treatment and cyanide-containing wastewater treatment can be carried out at the same time to find more efficient to complete the present invention.

이하, 본 발명에 대하여 상세히 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

본 발명은 전기도금 공정으로부터 발생되는 산폐수를 재활용하여 시안 함유 폐수를 처리함으로써 산폐수와 시안 함유 폐수를 동시에 처리할 수 있는 방법에 관한 것이다.The present invention relates to a method for treating acid wastewater and cyanide wastewater at the same time by treating the cyanide wastewater by recycling the acid wastewater generated from the electroplating process.

본 발명에 따르면, 전기도금 공정으로부터 발생되는 산폐수에서 가장 많이 존재하는 성분인 철이온 성분이 시안 성분과 물속에서 반응하여 복합체를 형성하는 점을 이용하여 제철 공정에서 발생하는 시안 함유 폐수에 존재하는 시안 성분을 쉽게 제거할 수 있도록 하였다. According to the present invention, iron ions, which are the most constituents of acid wastewater generated from electroplating processes, react with cyanide in water to form a complex, which is present in cyanide-containing wastewater generated in the steelmaking process. The cyan component was easily removed.

일반적으로 폐수에 포함된 프리 시안은 기존의 방법인 산화법을 사용하여 처리가능하나 금속과 결합되어 있는 철-시안화합물은 산화법으로 처리가 잘 되지않아 철착염법을 사용하고 있다. 따라서 산폐수에 다량 포함되어 있는 철이온 성분을 이용하면 시안화합물을 경제적으로 처리할 수 있다. 일 예로, 도금공정으로부터 발생된 산폐수의 성분을 표 1에 나타내었다.In general, the free cyan in the waste water can be treated using the conventional oxidation method, but iron-cyanide compounds combined with the metal are not treated well by the oxidation method, and thus the iron complex salt method is used. Therefore, the use of iron ions contained in a large amount of acid waste water can economically process the cyan compound. As an example, the components of the acid wastewater generated from the plating process are shown in Table 1.

[표 1] 고농도 산폐수 성분 분석 결과 [Table 1] Analysis results of high concentration acid wastewater components

성 분ingredient FeFe HClHCl pHpH 함량(ppm)Content (ppm) 11,00011,000 40,00040,000 0.350.35

상기 표 1에서 볼 수 있듯이 도금공정으로부터 발생된 산폐수의 주 성분은 Fe와 염화수소로 함량은 11,000, 40,000ppm 정도이며 pH는 0.35이었다As can be seen in Table 1, the main components of the acid wastewater generated from the plating process were Fe and hydrogen chloride, and the contents were about 11,000 and 40,000 ppm, and the pH was 0.35.

본 발명에 사용될 수 있는 산폐수는 전기도금 공정으로부터 발생되는 산폐수라면 어느 것이든 사용될 수 있다. 본 발명에 사용될 수 있는 산폐수는 특별히 한정하는 것은 아니나, 바람직하게 철 5,000-10,000ppm, HCl 20,000-50,000ppm 및 pH 0.1-0.5을 갖는 것을 포함한다. The wastewater which can be used in the present invention can be used as long as the wastewater generated from the electroplating process. Acid wastewater that can be used in the present invention is not particularly limited, but preferably includes one having iron 5,000-10,000 ppm, HCl 20,000-50,000 ppm and pH 0.1-0.5.

상기 산폐수를 시안 함유 폐수에 투입시, 상기 산폐수의 투입량은 시안 농도 에따라 적절히 선택될 수 있다. 본 발명의 일 구현에 있어서, 상기 산폐수는 시안 함유 폐수에 시안 1ppm 당 1~10㎖로 첨가될 수 있다.When the acid wastewater is added to the cyan-containing wastewater, the amount of the acid wastewater may be appropriately selected according to the cyan concentration. In one embodiment of the present invention, the acid wastewater may be added to the cyan-containing wastewater in 1 ~ 10ml per 1ppm cyan.

또한, 상기 시안 함유 폐수는 이에 한정하는 것은 아니나, 바람직하게 제철 공정에서 발생하는 시안 함유 폐수이다. In addition, the cyan-containing wastewater is not limited thereto, but is preferably cyan-containing wastewater generated in the steelmaking process.

상기 산폐수를 시안 함유 폐수에 투입한 다음, 응집제를 투입하여 응집 및 침전시켜 폐수내 시안 성분을 제거한다. 본 발명에 사용가능한 응집제는 특별히 제 한되지 않으며 예를 들어, 알루미늄 화합물 또는 철 화합물과 같은 고분자 응집제가 사용될 수 있다.The acid wastewater is introduced into the cyan-containing wastewater, and then a flocculant is added to coagulate and precipitate to remove the cyan component in the wastewater. The flocculant usable in the present invention is not particularly limited and polymer coagulants such as, for example, aluminum compounds or iron compounds may be used.

이하, 첨부된 도면을 참조로 본 발명의 시안 함유 폐수의 처리 방법을 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described a method for treating cyan-containing wastewater of the present invention.

도 1은 본 발명에 의한 시안 함유 폐수의 처리 공정을 나타낸 흐름도이다. 도시된 바와 같이, 본 발명에 의한 시안 함유 폐수의 처리 공정은 원폐수가 유입되어 산폐수와 반응이 이루어지는 산폐수 반응조(20)와, 상기 산폐수 반응조(20)으로부터 유입된 폐수를 응집제와 반응시키는 응집제 반응조(30)와, 응집반응된 원수를 침전시키는 침전조(40)로 구성된다. 1 is a flow chart showing a process for treating cyan-containing wastewater according to the present invention. As shown, the treatment process of cyan-containing wastewater according to the present invention is a wastewater reaction tank 20 in which the raw wastewater is introduced and reacts with the acid wastewater, and the wastewater introduced from the wastewater reaction tank 20 is reacted with a flocculant. It consists of a flocculant reaction tank 30, and a precipitation tank 40 for precipitating the coagulated raw water.

산폐수 탱크(50)에 저장된 산폐수는 산폐수 투입 펌프(60)에 의해 산폐수 투입관을 통해 상기 산폐수 반응조(20)에 투입된다. 산폐수와 반응된 원폐수(시안 함유 폐수)는 응집제 반응조(30)로 이동하게 된다. 그 다음, 응집제 탱크(100)에 저장된 응집제는 응집제 투입 펌프에 의해 응집제 투입관을 통해 상기 응집제 반응조에 투입된다. 그 다음, 응집반응된 원폐수는 침전조(40)로 이동하게 된다. 침전조(40)에서 침전된 상등액은 여과 및 분리되어 정화된 정수로 되어 방류되게 된다.The wastewater stored in the wastewater tank 50 is introduced into the wastewater reaction tank 20 through a wastewater input pipe by a wastewater input pump 60. The raw wastewater (cyanide-containing wastewater) reacted with the acid wastewater is moved to the flocculant reactor 30. Then, the coagulant stored in the coagulant tank 100 is introduced into the coagulant reaction tank through the coagulant inlet tube by a coagulant inlet pump. Then, the coagulated raw waste water is moved to the settling tank (40). The supernatant precipitated in the settling tank 40 is filtered and separated to be purified purified water is discharged.

이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

〈실시예 1〉<Example 1>

본 실시예에서는 도금공정으로부터 발생된 산폐수를 이용하여 시안 화합물의 제거효능을 조사하였으며, 본 시험에 사용된 산폐수는 도 1에 나타낸 성분을 가진 도금공정으로부터 발생된 산폐수이었다. 상기 산폐수를 이용한 시안화합물의 제거효능 실험은 1리터 비이커에 교반장치를 설치한 후 시안농도가 20ppm인 실 폐수를 넣고 상기 산폐수를 10, 20, 30, 40, 50㎖씩 넣고 30분간 상온에서 교반시킨 뒤 고분자 응집제(HANSUFLOCK PA-312, (주)한수)를 투입(1~2ppm)하여 교반, 침전시킨 후 상등액의 수질을 분석하여 시안의 제거능을 알아보았다.In this example, the removal efficiency of the cyan compound was investigated using acid wastewater generated from the plating process, and the acid wastewater used in this test was wastewater generated from the plating process having the components shown in FIG. 1. Experiment of the removal efficiency of the cyanide compound using the acid wastewater was installed in a 1 liter beaker, the real wastewater having a cyan concentration of 20ppm and put the wastewater in 10, 20, 30, 40, 50ml each room temperature for 30 minutes After stirring at, a polymer coagulant (HANSUFLOCK PA-312, Co., Ltd.) was added (1 ~ 2ppm), stirred and precipitated, and the water quality of the supernatant was analyzed to determine the ability to remove cyanide.

이상의 실험과정을 거쳐 도출된 실험 결과는 다음과 같다. 즉 산폐수의 투입량과 시안 제거율에 대한 결과를 표 2에 나타내었다. The experimental results derived through the above experimental process are as follows. In other words, Table 2 shows the results of the input amount of acid wastewater and cyanide removal rate.

표 2. 투입량에 의한 시안 제거능 실험 결과Table 2. Results of cyanide removal performance by dose

투입량(㎖)Input amount (ml) 시안 제거율(%)Cyan removal rate (%) 00 00 1010 2525 2020 3838 3030 7070 4040 9797 5050 9898

표 2에서 볼 수 있듯이 산폐수 점차적으로 늘렸을 때 상등수의 시안제거율은 점차적으로 증가하여 40~50㎖를 넣었을 때 제거효율이 97% 이상인 것을 확인하였다. 또한, 시안농도가 20ppm인 폐수를 효과적으로 제거하기 위한 도금공정 으로부터 발생된 산폐수의 적정 투입량은 시안 ppm 당 적어도 약 2㎖ 인 것으로 판단되었다. As shown in Table 2, when the wastewater was gradually increased, the cyanide removal rate of the supernatant was gradually increased, and the removal efficiency was more than 97% when 40-50 ml was added. In addition, the proper amount of acid wastewater generated from the plating process for effectively removing 20 ppm cyanide wastewater was determined to be at least about 2 ml per ppm cyanide.

도 1은 본 발명에 따라 산폐수를 이용하여 시안 함유 폐수를 처리하는 방법을 최적 시스템으로 수행하기 위한 공정도이다.1 is a process chart for carrying out a method for treating cyanide-containing wastewater using an acid wastewater in an optimal system according to the present invention.

* 도면의 주요 부분에 대한 부호 설명 *Explanation of symbols on the main parts of the drawings

10: 원폐수 유입관 20: 산폐수 반응조 30: 응집제 반응조10: raw wastewater inlet pipe 20: acid wastewater reactor 30: flocculant reactor

40: 침전조 50: 산폐수 탱크 60: 산폐수 투입 펌프40: sedimentation tank 50: acid wastewater tank 60: acid wastewater input pump

70: 산폐수 투입관 80: 응집제 투입관 90: 응집제 투입 펌프70: acid wastewater input pipe 80: flocculant input pipe 90: flocculant input pump

100: 응집제 탱크100: flocculant tank

Claims (4)

전기도금 공정으로부터 발생되는 산폐수를 시안 함유 폐수에 투입하는 단계; 및 응집제를 투입하여 응집 및 침전시키는 단계를 포함하는 것을 특징으로 하는 시안 함유 폐수 처리 방법.Injecting the acid wastewater generated from the electroplating process into the cyan-containing wastewater; And clumping and precipitating by adding a flocculant to the cyan-containing wastewater treatment method. 제 1항에 있어서, 상기 전기도금 공정으로부터 발생되는 산폐수는 철 5,000-10,000ppm, HCl 20,000-50,000ppm 및 pH 0.1-0.5을 갖는 것을 특징으로 하는 방법.The method of claim 1, wherein the acid wastewater generated from the electroplating process has iron 5,000-10,000 ppm, HCl 20,000-50,000 ppm and pH 0.1-0.5. 제 1항에 있어서, 상기 전기도금 공정으로부터 발생되는 산폐수는 시안 함유 폐수에 시안 1ppm 당 1~10㎖로 첨가되는 것을 특징으로 하는 방법. The method according to claim 1, wherein the acid wastewater generated from the electroplating process is added to the cyan-containing wastewater at 1 to 10 ml per 1 ppm of cyan. 제 1항에 있어서, 상기 시안 함유 폐수는 제철 공정에서 발생하는 시안 함유 폐수인 것을 특징으로 하는 시안 함유 폐수 처리 방법.The method for treating cyan-containing wastewater according to claim 1, wherein the cyan-containing wastewater is cyan-containing wastewater generated in a steelmaking process.
KR1020070135812A 2007-12-21 2007-12-21 Method for treatment of wastewater containing cyanide KR101420656B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070135812A KR101420656B1 (en) 2007-12-21 2007-12-21 Method for treatment of wastewater containing cyanide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070135812A KR101420656B1 (en) 2007-12-21 2007-12-21 Method for treatment of wastewater containing cyanide

Publications (2)

Publication Number Publication Date
KR20090067970A true KR20090067970A (en) 2009-06-25
KR101420656B1 KR101420656B1 (en) 2014-07-21

Family

ID=40995629

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070135812A KR101420656B1 (en) 2007-12-21 2007-12-21 Method for treatment of wastewater containing cyanide

Country Status (1)

Country Link
KR (1) KR101420656B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109019945A (en) * 2017-06-12 2018-12-18 鞍钢股份有限公司 Method for treating cyanide-containing wastewater
WO2021102824A1 (en) * 2019-11-28 2021-06-03 叶文静 Method for treating comprehensive electroplating wastewater
CN109019820B (en) * 2017-06-12 2021-07-20 鞍钢股份有限公司 Method for treating oil-containing graphite wastewater

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0136166B1 (en) * 1994-11-22 1998-04-25 김만제 Treatment of waste water containing cyanide compound and oil
KR20020015790A (en) * 2000-08-23 2002-03-02 이구택 A treating method of desulfurized wastewater
JP4656379B2 (en) 2004-07-14 2011-03-23 栗田工業株式会社 Method of treating wastewater containing iron cyanide
KR100778754B1 (en) 2006-10-18 2007-11-29 주식회사 포스코 Method for chemical treatment of wastewater comprising cyanide compounds

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109019945A (en) * 2017-06-12 2018-12-18 鞍钢股份有限公司 Method for treating cyanide-containing wastewater
CN109019945B (en) * 2017-06-12 2021-07-20 鞍钢股份有限公司 Method for treating cyanide-containing wastewater
CN109019820B (en) * 2017-06-12 2021-07-20 鞍钢股份有限公司 Method for treating oil-containing graphite wastewater
WO2021102824A1 (en) * 2019-11-28 2021-06-03 叶文静 Method for treating comprehensive electroplating wastewater

Also Published As

Publication number Publication date
KR101420656B1 (en) 2014-07-21

Similar Documents

Publication Publication Date Title
JP5828969B2 (en) Coal gasification wastewater treatment system and coal gasification wastewater treatment method
KR100778754B1 (en) Method for chemical treatment of wastewater comprising cyanide compounds
CN114751582A (en) Treatment method of electroplating mixed wastewater
JP4382556B2 (en) Treatment method of wastewater containing cyanide
JP5945682B2 (en) Treatment method of wastewater containing cyanide
CN108137358B (en) Method for treating cyanide complex-containing wastewater and treating agent used in method
CN105800821A (en) Up-to-standard treatment method and device for zinc-nickel alloy waste water
JP2007260586A (en) Treatment method of waste water generated in coke oven
JP2007252969A (en) Purification method of steel production drainage
KR101543551B1 (en) Wastewater treatment system using electrolysis
CN104961272A (en) Method for treating cyaniding tailing pulp in gold industry
KR101420656B1 (en) Method for treatment of wastewater containing cyanide
WO2016042901A1 (en) Biological treatment method and biological treatment device
CN213060470U (en) Sulfuric acid process titanium dioxide effluent treatment plant
JP2004249258A (en) Wastewater treatment method
JPH10118664A (en) Treatment of waste water containing cyan compound and organic matter
JP4639309B2 (en) Treatment method of wastewater containing cyanide
TWI646057B (en) Method of treating nitrate nitrogen solution
JP2001300553A (en) Method for treating cyanide-containing wastewater
JP6201114B2 (en) Treatment method of wastewater containing cyanide
KR100495765B1 (en) Method of preparing iron oxide catalysts for fenton oxidation and use of iron oxide catalysts prepared thereby
KR102099426B1 (en) Method for treating industrial wastewaters
KR100495764B1 (en) Method of preparing iron catalysts for fenton oxidation and use of iron catalysts prepared thereby
JPH01194997A (en) Treatment of cyanide-containing solution and aerobe obtained by conditioning of facultative anaerobe
JPH06182344A (en) Decomposition and utilization method and device for salt and inorganic nitrogen compound-containing solution

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20170704

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20180711

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20190710

Year of fee payment: 6