KR101318285B1 - Reuse discharge of wastewater - Google Patents
Reuse discharge of wastewater Download PDFInfo
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- KR101318285B1 KR101318285B1 KR1020130052273A KR20130052273A KR101318285B1 KR 101318285 B1 KR101318285 B1 KR 101318285B1 KR 1020130052273 A KR1020130052273 A KR 1020130052273A KR 20130052273 A KR20130052273 A KR 20130052273A KR 101318285 B1 KR101318285 B1 KR 101318285B1
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- dye wastewater
- ozone oxidation
- effluent
- ultrafiltration
- reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
Abstract
Description
본 발명은 염색폐수 방류수의 재이용방법에 관한 것으로, 보다 상세하게는 염색폐수처리장에서 배출되는 염색폐수 방류수를 오존산화공정, 활성탄흡착공정, 한외여과(Ultra Filteration, UF)공정, 역삼투압(Reverse Osmosis, RO)공정을 거쳐 염색용수로 재이용할 수 있도록 한 염색폐수 방류수의 재이용방법에 관한 것이다.
The present invention relates to a method for reusing dye wastewater effluent. More specifically, the dye wastewater effluent discharged from the dye wastewater treatment plant is treated with ozone oxidation, activated carbon adsorption, ultrafiltration (Ultra filtration), and reverse osmosis. The present invention relates to a method for reusing dyeing wastewater, which can be reused as dyeing water after RO treatment.
염색 가공시 발생하는 염색폐수에는 다량의 유기합성 화공약품이 포함되어 있으며, 특히 피가공물인 섬유에 사용된 호제 및 염료 등이 피가공물에 전량 결합되지 못하고 상당량이 물에 혼합되어 배출되기 때문에 생물학적으로 분해가 어려운 유기오염물질이 다량으로 포함되어 있으며 다양한 색상의 염료로 인해 제거하기 어려운 색도까지 가지고 있다.Dyeing wastewater generated during dyeing process contains a large amount of organic synthetic chemicals. Especially, since the dyes and dyes used in the fiber, which are processed, are not fully bound to the processed material, a considerable amount is mixed with water and discharged biologically. It contains a large amount of organic pollutants that are difficult to decompose and has a chromaticity that is difficult to remove due to various color dyes.
이러한 염색폐수는 염색폐수처리장에서 물리적, 화학적, 생물학적 처리공정을 거친 후 생활하수 등을 처리하는 하수종말처리장으로 보내져 배출허용기준 이내까지 재차 처리되어 하천에 방류되고 있으나 염색폐수로 인해 발생한 색도는 하수종말처리장의 처리공정을 거친 후에도 충분히 제거가 되지 않기 때문에 하천에 유입될 경우 색경관에 영향을 주어 심미적으로 악영향을 미칠 뿐만 아니라 염색용수나 기타 공업용수로도 재이용할 수 없었다.These dyeing wastewater is sent to the sewage terminal treatment plant where the sewage wastewater treatment plant undergoes physical, chemical and biological treatment, and then treated with domestic sewage. Since it is not sufficiently removed even after the treatment process of the terminal treatment plant, when it flows into the river, it affects the color landscape and aesthetically adversely affects it, and it cannot be reused as dyeing water or other industrial water.
한편, 최근 환경에 대한 사회적 관심이 고조되고 있는 상황에 맞추어 하, 폐수처리장의 방류수 수질기준이 강화되고 있어 염색폐수를 처리하는데 점차 많은 시간과 비용이 소요된다는 점과 공업용수 비용이 지속적으로 상승하고 있는 점으로 인해 섬유가공업체에 많은 부담이 되고 있는 실정이다.
Meanwhile, in line with the growing social interest in the environment, the discharged water quality standards of sewage and wastewater treatment plants are being strengthened, and it takes more and more time and costs to treat dyeing wastewater. Due to the fact that it is a burden on the textile processing companies.
이에 염색폐수처리장에서 배출되는 폐수를 역삼투시스템과 증발기를 이용하여 처리함으로서 높은 회수율로 처리수를 얻어 이를 공업용수 등으로 재이용할 수 있는 방법이 대한민국 특허공개 2000-0032313호 "역삼투법과 증발법을 이용한 염색폐수처리방법"으로 제안된 바가 있다.Thus, by treating the wastewater discharged from the dye wastewater treatment plant using a reverse osmosis system and an evaporator, a method of obtaining treated water with high recovery rate and reusing it as industrial water is disclosed in Korean Patent Laid-Open Publication No. 2000-0032313. Dyeing wastewater treatment method using "has been proposed.
그러나, 상기한 염색폐수처리방법에 사용되는 증발법은 대형보일러 등의 증발기를 설치해야 하고 그 증발기를 가동하는데 많은 에너지와 자원이 소모되어 경제성이 전혀 없는 문제점이 있다. 염색폐수 방류수를 공업용수로 재이용하기 위해서는 처리단가를 최대한 낮추어 비용상의 이점을 확보해야 하나 상기의 방법으로는 증발을 위해 다량의 열에너지가 필요하고 이를 위한 많은 비용이 발생하기 때문에 경제성이 낮아 실용화되기 어려운 문제점이 있다.
However, the evaporation method used in the dyeing wastewater treatment method has a problem in that an evaporator such as a large boiler must be installed and a lot of energy and resources are consumed to operate the evaporator. In order to reuse dyed wastewater as industrial water, it is necessary to secure the cost advantage by lowering the processing cost as much as possible.However, in the above method, a large amount of thermal energy is required for evaporation. There is a problem.
본 발명은 상기한 여러 문제를 해결하기 위해 도출된 것으로, 염색폐수처리장에서 배출되는 염색폐수 방류수를 하수종말처리장으로 유입시켜 재차 처리하지 않고 염색폐수처리장에 별도의 처리장치를 설치하여 오존산화, 활성탄흡착, 한외여과(Ultra Filteration, UF), 역삼투압(Reverse Osmosis, RO) 처리함으로써 염색폐수 방류수를 곧 바로 염색용수로 재이용할 수 있도록 한 염색폐수 방류수의 재이용방법을 제공하는데 그 목적이 있다.
The present invention was derived to solve the various problems described above, ozone oxidation, activated carbon by installing a separate treatment device in the dyeing wastewater treatment plant without introducing the dyeing wastewater discharged from the dyeing wastewater treatment plant to the sewage end treatment plant again. It is an object of the present invention to provide a method for reusing dye wastewater effluent so that the dye wastewater effluent can be directly reused as dyeing water by treatment with adsorption, ultrafiltration (UF), and reverse osmosis (RO).
상기한 목적을 달성하기 위한 본 발명에 따른 염색폐수 방류수의 재이용방법은, 염색폐수 방류수가 저장된 저장조에 오존을 주입하여 오존에 의한 산화분해반응으로 염색폐수 방류수에 포함된 난분해성 오염물질을 분해성 오염물질로 분해시키고 염색염료에 의해 유발된 색도를 제거하는 오존산화공정과, 상기 오존산화공정을 거친 처리수를 활성탄이 충진된 흡착탑에 하향류로 유입시켜 유기물질, 색도 및 잔류염소 등을 제거하는 활성탄흡착공정과, 상기 활성탄흡착공정을 거친 처리수를 한외여과장치에 투입해 상기 오존산화공정 및 활성탄흡착공정에서 미처리된 미세 오염물질과 색도를 제거하는 한외여과공정 및 상기 한외여과공정을 거친 처리수를 역삼투시스템에 투입하여 상기 한외여과공정에서 제거하지 못한 일부 미세 이물질과 구리, 칼슘, 철, 망간, 알루미늄, 염소, 황산 등의 이온성분을 제거하는 역삼투압공정으로 이루어진 것을 특징으로 한다.
Recycling method of the dye wastewater effluent according to the present invention for achieving the above object is decomposable contamination of the hardly degradable contaminants contained in the dye wastewater effluent by oxidative decomposition reaction by ozone by injecting ozone into the storage tank in which the dye wastewater effluent is stored. Ozone oxidation process to decompose the material and remove the color caused by the dye, and to remove the organic matter, color and residual chlorine by flowing the treated water after the ozone oxidation process into the adsorption column filled with activated carbon downflow Activated carbon adsorption process and the treated water that has undergone the activated carbon adsorption process into the ultrafiltration device to remove the untreated microcontaminants and chromaticity in the ozone oxidation process and activated carbon adsorption process and the ultrafiltration process and the ultrafiltration process Some fine foreign matter, copper, knife which could not be removed in the ultrafiltration process by introducing water into the reverse osmosis system It is characterized by consisting of a reverse osmosis process for removing ionic components such as calcium, iron, manganese, aluminum, chlorine, sulfuric acid.
본 발명에 따른 염색폐수 방류수의 재이용방법에 의하면, 후단의 한외여과 및 역삼투압으로 구성된 막여과공정의 전처리공정으로 난분해성 물질 제거와 색도 저감에 효율적인 오존산화 및 활성탄흡착공정을 거치도록 함으로써 염색폐수 방류수의 수질을 효율적으로 개선함과 동시에 염색폐수처리 시 제거가 가장 어려운 색도를 완전하게 제거하여 염색용수로 효과적으로 재이용할 수 있는 효과가 있다.According to the recycling method of the dye wastewater effluent according to the present invention, the dye wastewater by going through the ozone oxidation and activated carbon adsorption process which is effective in removing the hardly decomposable substance and reducing the color as a pretreatment process of the membrane filtration process composed of ultrafiltration and reverse osmosis at the rear stage. Efficiently improving the water quality of the effluent and at the same time has the effect that can be effectively reused as dyeing water by completely removing the most difficult color to remove during dyeing wastewater treatment.
그리고, 본 발명의 염색폐수 방류수의 재이용방법을 염색폐수처리장에 적용하게 되면 염색폐수 방류수를 하수종말처리장으로 유입하여 재처리하지 않고 곧바로 염색용수로 재이용할 수 있게 되므로 기존의 정수장에서 상수도를 공업용수로 공급받는 방식과 비교하여 상수도요금, 하수도요금, 물이용부담금 등이 없어지고 염색폐수를 처리하는 비용만 부담하면 되기 때문에 섬유가공업체의 공업용수 비용을 획기적으로 절감시킬 수 있는 효과가 있다. 또한, 하천으로의 방류수 배출이 없기 때문에 오염물질 배출저감으로 인한 자연환경을 개선하는 효과도 있다.
In addition, if the recycling method of the dye wastewater effluent of the present invention is applied to the dye wastewater treatment plant, the dye wastewater effluent can be directly reused as the dyeing water without reprocessing by flowing into the sewage terminal treatment plant. Compared with the supply method, there is no water supply fee, sewage fee, water use charges, and only the cost of treating the dyeing waste water can reduce the industrial water cost of the textile processing company. In addition, since there is no discharge of effluent into the river, there is an effect of improving the natural environment due to the reduction of pollutant emissions.
도 1은 본 발명에 따른 염색폐수 방류수의 처리공정을 나타낸 공정도,1 is a process chart showing the treatment process of the dyeing wastewater effluent according to the present invention,
본 발명은 염색폐수처리장에서 1차적으로 처리되어 배출되는 염색폐수 방류수를 염색용수로 재이용하기 위한 방법에 관한 것으로, 염색폐수 방류수를 처리하는 공정은 개략적으로 염색폐수 방류수에 포함된 난분해성 물질을 분해성물질로 분해하고 염색염료로 인해 발생되는 색도를 효과적으로 제거하기 위해 오존산화공정 및 활성탄흡착공정의 전처리과정을 거친 후 상기 전처리과정에서 제거되지 않은 미세 이물질, 이온성분 및 잔존 색도를 최대한 제거하기 위해 막여과공정인 한외여과공정 및 역삼투압공정을 거치는 순서로 이루어진다.
The present invention relates to a method for reusing dyed wastewater effluent, which is primarily treated and discharged from a dyed wastewater treatment plant, as a dyeing water. The process of treating the effluent water is a degradable substance that is roughly contained in a dyed wastewater effluent. Membrane filtration to remove the fine particles, ionic components and residual color that have not been removed in the pretreatment process after the pretreatment of ozone oxidation process and activated carbon adsorption process in order to decompose The process consists of an ultrafiltration process and a reverse osmosis process.
이하, 첨부된 도면을 참조하여 본 발명의 각 처리공정에 대해 상세하게 설명하기로 한다.Hereinafter, each treatment process of the present invention will be described in detail with reference to the accompanying drawings.
한편, 본 발명을 설명함에 있어 공지기술 및 통상적인 기술에 대한 구체적인 설명은 본 발명의 요지를 흐릴 수 있어 생략하거나 간단한 명칭 등으로 대체한다.
Meanwhile, in the description of the present invention, detailed descriptions of well-known technology and conventional technology may obscure the gist of the present invention and may be omitted or replaced with a simple name.
도 1은 오존산화공정, 활성탄흡착공정, 한외여과공정 및 역삼투압공정으로 이루어진 본 발명에 따른 염색폐수 방류수의 처리공정을 보여주는 공정도이다.
1 is a process chart showing the treatment of the dye wastewater effluent according to the present invention consisting of an ozone oxidation process, activated carbon adsorption process, ultrafiltration process and reverse osmosis process.
첫번째 공정인 오존산화공정은 하단부의 막여과공정을 위한 전처리공정 중 하나로 염색폐수처리장에서 처리되어 배출되는 염색폐수 방류수가 1차적으로 유입되어 저장되는 저장조에 오존을 주입하여 오존에 의한 산화분해반응으로 염색폐수 방류수에 포함된 난분해성 오염물질을 분해성 오염물질로 분해시키고 색도를 제거하는 공정이다.The first process, the ozone oxidation process, is one of the pretreatment processes for the membrane filtration process at the bottom, which is oxidatively decomposed by ozone by injecting ozone into the reservoir where the dye wastewater discharged from the dye wastewater treatment plant is first introduced and stored. It is a process that decomposes the hardly degradable contaminants contained in the dye wastewater effluent into degradable contaminants and removes the color.
상기한 오존산화공정은 대표적인 고도처리 기술의 하나로써, 종래 정수 및 하,폐수처리공정의 후반부에 적용되어 살균과 동시에 색도를 제거하기 위한 목적으로 주로 사용되어 왔다.The ozone oxidation process is one of the representative advanced treatment technologies, and has been used mainly for the purpose of removing color at the same time as it is applied to the second part of the conventional water purification and wastewater treatment processes.
본 발명에서는 상기한 오존산화공정을 후속공정인 활성탄흡착공정의 전단에 적용함으로써 염색폐수 방류수의 유기오염물질과 색도를 사전 처리함으로써 후단의 활성탄흡착공정과 한외여과공정 및 역삼투압공정에 대한 부하를 감소시켜 오염물질에 대한 처리효율과 운전주기(수명)를 극대화시킨다.In the present invention, the ozone oxidation process is applied to the front end of the activated carbon adsorption process, which is a subsequent process, to pre-treat the organic pollutants and the chromaticity of the dye wastewater effluent, thereby reducing the load on the activated carbon adsorption process, the ultrafiltration process, and the reverse osmosis process. Reduction, maximizing treatment efficiency and operating cycle (life) for contaminants.
한편, 본 발명의 오존산화공정에서 오염물질을 산화시키기 위해 주입하는 오존의 공급방식은 산기관을 이용하여 공급하는 방식보다 오염물질의 접촉성 및 반응성이 우수한 벤츄리방식을 이용하여 공급하는 것이 바람직하다.
On the other hand, in the ozone oxidation process of the present invention, the supply method of ozone injected to oxidize contaminants is preferably supplied using a venturi method which has superior contact and reactivity of contaminants than a method of supplying using an diffuser. .
다음으로, 두번째 공정인 활성탄흡착공정은 상기 오존산화공정을 거친 처리수를 활성탄이 충진된 흡착탑에 하향류로 유입시켜 충진된 활성탄을 거치면서 포함된 유기물질, 색도 및 잔류염소 등을 제거하는 공정이다.Next, the activated carbon adsorption process, which is a second process, removes organic substances, colors, residual chlorine, and the like while passing the treated water that has undergone the ozone oxidation process in an upstream of the activated carbon-filled adsorption column. to be.
상기 오존산화공정을 거친 처리수는 난분해성 오염물질이 분해되어 분해성 오염물질로 변하는데 이렇게 분해된 분해성 오염물질을 상기 활성탄흡착공정으로 효과적으로 흡착 제거함으로써 처리수의 COD, BOD, SS 및 색도를 대폭 낮추는 것이다.The treated water undergoing the ozone oxidation process is decomposed into hardly decomposable contaminants to be decomposable contaminants. The decomposed contaminants are effectively adsorbed and removed by the activated carbon adsorption process, thereby greatly reducing COD, BOD, SS and chromaticity of the treated water. To lower it.
이러한 오존산화공정과 활성탄흡착공정으로 이루어지는 전처리과정은 후단에서 실시하는 막여과공정의 오염부하를 최소화시켜주어 막여과공정에서 미세 오염물질과 이온물질의 제거가 보다 효과적으로 이루어지도록 하고, 막여과공정에 적용되는 분리막의 수명 및 운전주기를 극대화시킨다.
The pretreatment process consisting of the ozone oxidation process and the activated carbon adsorption process minimizes the contaminating load of the membrane filtration process performed at the later stage, so that the microfiltration and ionic substances are more effectively removed during the membrane filtration process. Maximize the lifespan and operation cycle of the applied membrane.
그 다음, 세번째 공정인 한외여과공정은 상기 활성탄흡착공정을 거친 처리수를 한외여과장치에 투입해 상기 오존산화공정 및 활성탄흡착공정에서 미처리된 미세 오염물질과 색도를 제거하는 공정이다.
Next, an ultrafiltration process, which is a third process, is a process of removing the untreated microcontaminants and chromaticity in the ozone oxidation process and the activated carbon adsorption process by introducing the treated water that has undergone the activated carbon adsorption process into the ultrafiltration device.
마지막으로, 네번째 공정인 역삼투압공정은 상기 한외여과공정을 거친 처리수를 역삼투시스템에 투입하여 상기 한외여과공정에서 제거하지 못한 일부 미세 이물질과 구리, 칼슘, 철, 망간, 알루미늄, 염소, 황산 등의 이온성분을 제거하는 공정으로 이 공정을 거친 처리수는 염색용수의 권장기준치에 부합하는 수질을 얻게 될 뿐만 아니라 나아가 먹는 물의 수질기준까지도 충족시키는 수질을 얻게 된다.
Finally, the reverse osmosis process, the fourth process, is a part of the fine water and copper, calcium, iron, manganese, aluminum, chlorine, sulfuric acid that was not removed in the ultrafiltration process by introducing the treated water after the ultrafiltration process to the reverse osmosis system As a process of removing ionic components, the treated water not only obtains the water quality that satisfies the recommended standard of dyeing water, but also the water quality of drinking water.
이하, 실시예를 통해 본 발명을 보다 상세하게 설명하기로 한다.
Hereinafter, the present invention will be described in more detail with reference to Examples.
먼저, 염색폐수처리장에서 1차적으로 처리되어 배출되는 염색폐수 방류수를 오존발생기가 설치된 저장조로 유입시킨 후 염색폐수 방류수에 황산, 가성소다 등의 약품을 투입하여 pH를 7.5로 조절한 다음 오존발생기로 오존농도 111.7mg/L로 주입하여 오존산화공정을 실시하였다.First, the dye wastewater discharged from the dyeing wastewater treatment plant is discharged into a storage tank equipped with an ozone generator, and then the pH is adjusted to 7.5 by adding chemicals such as sulfuric acid and caustic soda to the dye wastewater discharged. The ozone concentration was injected into an ozone concentration of 111.7 mg / L and the ozone oxidation process was performed.
통상적으로 염색폐수처리장에서 배출되는 염색폐수 방류수는 pH 6 ~ 7 정도의 중성이나 염색폐수 원수의 상태에 따라 pH가 변화하여 산성 또는 알칼리성을 가지게 되는 경우도 있다. 이에 본 출원인은 pH에 따른 오존산화공정의 처리특성을 살펴보기 위해 다양한 pH를 가진 염색폐수 방류수에 대하여 오존산화공정을 실시하였고, 그 결과 유기오염물질의 제거특성을 확인하는데 가장 주요한 인자인 BOD 및 COD가 가장 많이 제거되는 등 최적의 처리효율을 가지는 pH는 7.5로 나타났다.In general, the dye wastewater discharged water discharged from the dye wastewater treatment plant may have acidity or alkalinity by changing the pH depending on the state of neutral or dyeing wastewater. In this regard, Applicant conducted ozone oxidation process for dyeing wastewater with various pH in order to examine the treatment characteristics of ozone oxidation process according to pH. As a result, BOD and The optimal treatment efficiency, such as the most COD removal, was found to be 7.5.
따라서, 본 발명에서는 염색폐수 방류수의 pH를 7.5로 조정하여 오존산화공정을 실시하는 것이 가장 바람직하다.Therefore, in the present invention, it is most preferable to perform the ozone oxidation process by adjusting the pH of the dye wastewater effluent to 7.5.
그리고, 오존주입농도에 따른 처리특성을 살펴본 결과 색도, COD, BOD의 경우 오존농도 111.7mg/L을 기준으로 그 이상의 오존주입농도에서는 처리효율 증가분이 급격하게 감소하였다. 따라서, 본 발명의 오존산화공정에서 최적의 처리효율을 얻기 위한 오존의 주입농도는 111.7mg/L로 조정하는 것이 가장 바람직하다.
In addition, as a result of examining the treatment characteristics according to the ozone concentration, the increase in treatment efficiency was rapidly decreased at the ozone concentration of 111.7 mg / L in the case of color, COD, and BOD. Therefore, it is most preferable to adjust the injection concentration of ozone to obtain the optimum treatment efficiency in the ozone oxidation process of the present invention to 111.7 mg / L.
그 다음 오존산화공정을 거친 처리수를 활성탄이 충진된 직경 500mm, 높이 1,800mm의 흡착탑에 유량 10㎥/day의 하향류로 유입시켜 처리수에 포함된 오염물질을 흡착되도록 하였다.
Then, the treated water that passed through the ozone oxidation process was introduced into the adsorption tower filled with activated carbon 500 mm in diameter and 1,800 mm in height by flowing downward at a flow rate of 10㎥ / day to adsorb contaminants contained in the treated water.
상기와 같이 오존산화공정과 활성탄흡착공정을 거친 처리수의 수질을 분석한 결과 COD는 79%가 낮아졌고, 색도는 76%가 제거되었고, SS(부유물질)는 90%가 제거된 것으로 나타났으며, 염색폐수 방류수와 본 발명에 따른 오존산화공정과 활성탄흡착공정을 거친 처리수의 일별 COD, TOC, 색도를 50일 동안 확인한 결과 아래 그래프와 같은 결과를 얻을 수 있었다.As a result of analyzing the water quality of the treated water after the ozone oxidation process and the activated carbon adsorption process, the COD was reduced by 79%, the color was removed by 76%, and the SS (rich material) was removed by 90%. In addition, the daily COD, TOC, and chromaticity of the treated wastewater treated with the dyeing wastewater and the ozone oxidation process and the activated carbon adsorption process according to the present invention were confirmed for 50 days.
위 그래프들에서 확인되듯이 50일 동안 측정한 염색폐수 방류수의 평균 COD는 63.2mg/L, TOC는 107.7mg/L, 색도는 320C.U.이었으나 본 발명의 오존산화공정과 활성탄흡착공정을 거친 후에 측정한 처리수의 평균 COD는 8.9mg/L, TOC는 16.18mg/L로, 색도는 55C.U.로 현격하게 낮아졌음을 알 수 있었다.
As shown in the graphs above, the average COD of the wastewater discharged during the 50 days was 63.2mg / L, TOC was 107.7mg / L, and the chromaticity was 320C.U., but the ozone oxidation process and activated carbon adsorption process of the present invention The average COD of the treated water measured later was 8.9 mg / L, the TOC was 16.18 mg / L, and the chromaticity was significantly lowered to 55 C.U.
상기와 같은 오존산화공정과 활성탄흡착공정을 거친 처리수를 한외여과장치에 투입하여 유량 1.5㎥/hr, 운전주기를 9분 정세 1분 역세, 막간차압(TMP)을 0.5kgf/㎠, 단위면적당처리수량(FLUX)을 40LMF로 하여 한외여과공정을 실시하였다.
The treated water after the ozone oxidation process and activated carbon adsorption process was introduced into the ultrafiltration device, and the flow rate was 1.5㎥ / hr, the driving cycle was 9 minutes, 1 minute backwash, and the TMP was 0.5kgf / ㎠, per unit area. An ultrafiltration process was performed with a treated water flux (FLUX) of 40 LMF.
그 다음, 상기 한외여과공정을 거친 처리수를 역삼투압장치에 투입하여 막간차압(TMP)을 1kgf/㎠, 단위면적당처리수량(FLUX)을 15LMF, 회수율을 50%로 운전하여 역삼투압공정을 실시하였다.
Then, the treated water that has undergone the ultrafiltration process was introduced into a reverse osmosis system, and a reverse osmosis process was carried out by operating a transmembrane pressure (TMP) of 1 kgf / cm 2, a treatment volume per unit area (FLUX) of 15 LMF, and a recovery rate of 50%. It was.
이상과 같이 본 발명에 따른 각 공정을 실시한 후 각 공정별 처리수의 수질을 분석한 결과가 아래 표1와 같이 나타났다.As described above, after performing each process according to the present invention, the result of analyzing the water quality of each process water was shown in Table 1 below.
위 표1에서 알 수 있듯이, 최종 역삼투압공정을 거친 RO처리수는 공업용수의 수질기준보다 훨씬 우수한 수질을 가지며, 염색용수로 사용해도 무방한 수질이었다.
As can be seen in Table 1, the RO treated water after the final reverse osmosis process has a much better water quality than the industrial water quality standards, it can be used as a dyeing water.
그리고, 본 발명에 따른 마지막 공정인 역삼투압공정을 거친 RO처리수에 포함된 이온물질을 분석한 결과가 아래 표2에 나타나있다.In addition, the results of analyzing the ionic material contained in the RO treated water after the reverse osmosis process, which is the last process according to the present invention, are shown in Table 2 below.
위 표2에서 알 수 있듯이, 역삼투압공정에서 염색폐수 방류수에 포함된 TDS(총용존고형물), 구리, 칼슘, 철, 망간, 알루미늄, 질산성질소, 염소, 황산 등의 이온물질이 효과적으로 제거되어 공업용수보다 우수한 수질을 얻을 수 있었다.
As can be seen from Table 2 above, ionic substances such as TDS (total dissolved solids), copper, calcium, iron, manganese, aluminum, nitrate nitrogen, chlorine and sulfuric acid contained in the dye wastewater effluent in the reverse osmosis process are effectively removed. Water quality superior to industrial water was obtained.
상기와 같은 본 발명에 따른 염색폐수 방류수의 재이용방법의 효과를 극대화하기 위해서 본 발명의 각 공정을 실시할 수 있는 수처리장치를 염색폐수처리장에 설치하면 염색폐수처리장에서 배출되는 염색폐수 방류수를 곧 바로 처리하여 염색용수로 재이용할 수 있게 된다.
In order to maximize the effect of the reuse method of the dyeing wastewater effluent according to the present invention as described above, if the water treatment apparatus that can perform each process of the present invention is installed in the dyeing wastewater treatment plant, the dyeing wastewater discharged from the dyeing wastewater treatment plant immediately It can be treated and reused as dyeing water.
Claims (4)
염색폐수 방류수가 저장된 저장조에 오존을 주입농도 111.7mg/L로 주입하여 오존에 의한 산화분해반응으로 염색폐수 방류수에 포함된 난분해성 오염물질을 분해성 오염물질로 분해시키고 색도를 제거하는 오존산화공정과;
상기 오존산화공정을 거친 처리수를 활성탄이 충진된 흡착탑에 하향류로 유입시켜 유기물질, 색도 및 잔류염소 등을 제거하는 활성탄흡착공정과;
상기 활성탄흡착공정을 거친 처리수를 한외여과장치에 투입한 후 운전조건을 9분 정세 후 1분 역세, 막간차압(TMP) 0.5kgf/㎠, 단위면적시간당처리유량(FLUX) 40LMF로 설정하여 상기 오존산화공정 및 활성탄흡착공정에서 미처리된 미세 오염물질과 색도를 제거하는 한외여과공정; 및
상기 한외여과공정을 거친 처리수를 역삼투압장치에 투입한 후 운전조건을 막간차압(TMP) 1kgf/㎠, 단위면적시간당처리유량(FLUX) 15LMF, 회수율 50%로 설정하여 상기 한외여과공정에서 제거하지 못한 일부 미세 이물질과 구리, 칼슘, 철, 망간, 알루미늄, 염소, 황산 등의 이온성분을 제거하는 역삼투압공정으로 이루어진 것을 특징으로 하는 염색폐수 방류수의 재이용방법.In the method of treating the dye wastewater discharged water discharged from the dye wastewater treatment plant,
Ozone oxidation process that injects ozone into the storage tank where the dye wastewater effluent is stored at an injection concentration of 111.7 mg / L, and decomposes the hardly degradable pollutants contained in the dye wastewater effluent into degradable pollutants and removes the color through oxidative decomposition by ozone. ;
Activated carbon adsorption process for removing the organic material, color, residual chlorine and the like by flowing the treated water after the ozone oxidation step into the adsorption column filled with activated carbon in a downflow;
After the activated carbon adsorption process was introduced into the ultrafiltration device, the operating conditions were set to 9 minutes, followed by 1 minute backwash, inter-membrane differential pressure (TMP) 0.5kgf / cm2, and the flow rate per unit area time (FLUX) 40LMF. Ultrafiltration process to remove untreated fine contaminants and color in ozone oxidation process and activated carbon adsorption process; And
The treated water after the ultrafiltration process was introduced into a reverse osmosis system, and the operating conditions were set to 1 kgf / cm2, a transit pressure per hour (FLUX) of 15 LMF, and a recovery rate of 50% to be removed from the ultrafiltration process. Recycling method of dyed wastewater effluent characterized in that the reverse osmosis process to remove some fine foreign matter and ionic components such as copper, calcium, iron, manganese, aluminum, chlorine, sulfuric acid.
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| CN111099764A (en) * | 2018-10-29 | 2020-05-05 | 上海东冠纸业有限公司 | Boiler water treatment system |
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