KR950002113B1 - Waste water treatment method - Google Patents
Waste water treatment method Download PDFInfo
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- KR950002113B1 KR950002113B1 KR1019910013754A KR910013754A KR950002113B1 KR 950002113 B1 KR950002113 B1 KR 950002113B1 KR 1019910013754 A KR1019910013754 A KR 1019910013754A KR 910013754 A KR910013754 A KR 910013754A KR 950002113 B1 KR950002113 B1 KR 950002113B1
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- wastewater
- industrial wastewater
- seawater
- waste water
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
본 발명은 염전에서 생성되는 간수(salt water) 또는 농축된 바닷물을 사용하여 알칼리성 산업폐수중의 고형분과 용존물질을 응집침전시킴으로써 폐수를 처리하는 방법에 관한 것이다.The present invention relates to a method for treating wastewater by coagulation sedimentation of solids and dissolved substances in alkaline industrial wastewater using salt water or concentrated seawater produced in salt water.
예를 들어 섬유나 직물의 염색업, 일부의 식품제조업, 석유화학산업, 콘크리트 제조업, 펄프산업 및 피혁업 분야의 공장에서 배출하는 산업폐수는 pH가 높아서 알칼리성이고, 고형 유기물, 용존유기물, 중금속 이온, 독성 및 난분해성 물질을 함유하고 있는 경우가 많다.For example, industrial wastewater discharged from textile and textile dyeing, some food manufacturing, petrochemical, concrete manufacturing, pulp and leather industries is alkaline due to high pH, and solid organic matter, dissolved organic matter and heavy metal ions. They often contain toxic and hardly decomposable substances.
이러한 산업폐수를 처리하기 위해, 지금까지는 산을 첨가하여 pH를 낮추고, 주로 명반등 무기물 및 고분자 유기물을 이용한 응집침전법이 많이 사용되어 왔다. 용존유기물이 많은 경우는 이러한 응집 침전으로 부유성 고형물질과 일부 용존물질을 응집 및 흡착으로 제거한후, 활성 슬러지법등 미생물을 이용한 생물학적 처리를 후속시켜 침전치 않은 오염물질을 분해 또는 흡착시킴으로 처리하기도 한다. 이 경우 생물학적 처리전에 폐수를 응집침전시키는 것은 고형 및 용존 유기물을 제거하여 생물학적 처리시 오염물 부하를 줄이고 독성 및 난분해성 물질을 제거하여 미생물의 활성도를 높일 수 있는 등 많은 장점이 있다. 하지만 응집을 시킬 때 많은 응집제가 필요하여 처리경비를 상승시키고 있다. 따라서, 처리경비를 줄이려고 값싼 응집제 개발에 많은 연구가 수행되고 있다. 최근들어 무한한 자연재인 바닷물중에 용존된 Mg++ 이온을 이용하여 알카리성 폐수를 처리하는 방법이 본 출원인 명의의 대한민국 특허 제36186호로 공개되었다. 하지만 이 특허방법은 내륙에 위치한 곳에서의 산업폐수의 처리에는 문제점이 있다. 즉, 많은 량의 바닷물을 공급하여야 하기 때문에 바닷물의 운송 및 유지비가 많이 들어 기존 응집제인 명반등 무기물 및 고분자 유기물을 이용하여 처리하는 경우에 비해 경비 절감 면에서 장점이 없다.In order to treat such industrial wastewater, until now, acid has been added to lower the pH, and agglomeration sedimentation method using inorganic and high molecular organic materials such as alum has been frequently used. In the case of a large amount of dissolved organic matter, flocculation and removal of suspended solids and some dissolved substances by flocculation and adsorption, followed by biological treatment using microorganisms such as activated sludge method to decompose or adsorb uncontaminated pollutants. do. In this case, flocculation and sedimentation of wastewater before biological treatment has many advantages, such as removal of solids and dissolved organics, reduction of pollutant load during biological treatment, and removal of toxic and hardly decomposable substances to increase the activity of microorganisms. However, when flocculating, a lot of flocculant is needed, which increases the processing cost. Therefore, much research is being conducted on the development of inexpensive flocculant to reduce the processing cost. Recently, a method for treating alkaline wastewater using Mg ++ ions dissolved in seawater, which is an infinite natural material, has been disclosed in Korean Patent No. 36186 in the name of the applicant. However, this patent method has a problem in the treatment of industrial wastewater located inland. That is, since a large amount of seawater must be supplied, there is no cost advantage in terms of cost reduction compared to the case of using inorganic and polymer organic materials such as alum, which are expensive because of the high transportation and maintenance costs of seawater.
따라서, 본 발명의 목적은 단순 바닷물(농축하지 않은 자연상태의 바닷물)에 의한 산업폐수 처리방법에서의 종래 기술에서의 문제점을 해결하기 위한 것으로, 보다 개선된 알칼리성 산업 폐수의 처리방법을 제공함에 있다.Accordingly, an object of the present invention is to solve the problems of the prior art in the industrial wastewater treatment method by simple seawater (non-concentrated natural seawater), to provide a more improved alkaline industrial wastewater treatment method. .
본 발명에서는 단순한 바닷물 사용 대신 햇빛 및 열에 의해 농축된 바닷물이나 소금제조후 또는 과정에서 분리되고 Mg++ 이온이 다량 함유되어 있는 산업부산물 등을 이용하여 알칼리성 산업폐수를 응집침전처리함을 특징으로 한다. 이러한 본 발명은 응집제로서의 Mg(OH)2을 만들기 위해, 간수등을 알칼리성 산업폐수와 혼합시키고, 폐수중의 고형분, 용존유기물, 중금속이온, 독성물질 등을 응집 및 침전시키고 정화수는 배수하고 슬러지는 제거함으로써 이루어진다.The present invention is characterized by coagulation sedimentation treatment of alkaline industrial wastewater using seawater concentrated by sunlight and heat or industrial by-products separated from the process after salt production or containing a large amount of Mg ++ ions instead of using simple seawater. In order to make Mg (OH) 2 as a flocculant, the present invention mixes the brine with alkaline industrial wastewater, aggregates and precipitates solids, dissolved organic matter, heavy metal ions and toxic substances in the wastewater, and drains and sludges the purified water. By removing it.
이 경우 사용할 수 있는 농축바닷물로는 염전이나 제염업 관련 산업으로부터의 부산물인 간수를 쓸 수 있어서 또다른 폐기물처리에 유용하며, 사용되는 간수등의 Mg++이온 함량은 1400mg/ι 이상인 것이면 된다. 따라서 본 발명에 의하면 응집에 필요한 바닷물의 량이 단순 바닷물을 이용시 보다 크게 격감되어 운송비를 절약할 수 있어 내륙지역에서도 경제적으로 알칼리성 산업 폐수의 처리를 할 수 있게 한다.In this case, as the concentrated seawater can be used as a by-product from salt and salt industry, it is useful for other waste treatment, and the Mg ++ ion content of the used brine should be more than 1400 mg / ι. Therefore, according to the present invention, the amount of seawater required for flocculation is greatly reduced when using simple seawater, thereby saving transportation costs, thereby enabling the treatment of alkaline industrial wastewater economically even in inland areas.
[실시예 1]Example 1
내륙지역에 있고 pH가 12정도 되는 피혁 산업폐수를 소금 제조과정에서 생성된 간수와 햇빛에 의해 농축된 바닷물 및 단순 바닷물을 이용하여 처리 가능성을 실험한바 간수인 경우는 단순 바닷물을 이용하는 경우보다 1/18∼1/20 정도 주입하여도 폐수중 고형물, 용존 유기물, 색도, 탁도, 인 및 Cr(V1) 이온을 각각 99%, 50%, 95%, 97% 및 99% 제거가 30분 이내의 침전으로 이루어졌다. 햇빛에 의해 농축된 바닷물의 경우에도 단순 바닷물을 이용시 보다 1/5∼1/10 정도 주입함으로 상기와 같은 제거효율을 얻었다.The leather industrial wastewater in the inland area with a pH of about 12 was tested using saltwater produced during salt manufacturing, seawater concentrated by sunlight, and simple seawater. Settling within 18 minutes to remove 99%, 50%, 95%, 97%, and 99% of solids, dissolved organics, chromaticity, turbidity, phosphorus and Cr (V1) ions, respectively, even after 18 to 1/20 injection. Was done. Even in the case of seawater concentrated by sunlight, the removal efficiency as described above was obtained by injecting about 1/5 to 1/10 than when using simple seawater.
[실시예 2]Example 2
pH가 11인 염색폐수 및 pH가 12.6인 식품제조업 폐수를 열로 농축시킨 바닷물을 이용하여 처리하였는바, 응집에 필요한 농축 바닷물은 단순 바닷물의 농축정도에 역비례함을 관찰되었고 이들 폐수의 처리시 고형성분, 색도 및 용존유기물의 제거효율은 98%, 65% 및 63% 이상이었다.The dyeing wastewater with pH 11 and the food manufacturing wastewater with pH 12.6 were treated with heat-concentrated seawater. The concentrated seawater required for flocculation was found to be inversely proportional to the concentration of simple seawater. The removal efficiencies of,, color and dissolved organics were more than 98%, 65% and 63%.
본 발명의 방법에 의해 알칼리성 산업폐수의 처리는 내륙지방에 있어서도 염가로 얻을 수 있는 농축된 바닷물과 바닷물을 이용하는 산업에서 Mg++ 이온이 농축된 산업 부산물을 이용하여 처리가 가능함으로써 폐수처리비를 절감할 수 있고 유기물 부하를 줄여 후속된 생물학적 처리시설이 크게 감축할 수 있다. 또한, 폐수중의 중금속 및 인의 농도를 감소할 수 있어 내륙지방의 하천 및 호소의 생태계를 보호하고 부영양화를 방지할 수 있다.The treatment of the alkaline industrial wastewater by the method of the present invention can reduce the wastewater treatment cost by being able to treat the concentrated seawater which can be obtained cheaply even in the inland region and the industrial by-product enriched with Mg ++ ions in the industry using the seawater. And the reduction of organic load can greatly reduce the subsequent biological treatment plant. In addition, the concentration of heavy metals and phosphorus in the waste water can be reduced to protect the ecosystem of inland streams and lakes and to prevent eutrophication.
본 발명은 알칼리성 산업폐수를 내는 섬유 염색업, 일부 식품제조업, 석유화학산업, 콘크리트 제조업, 펄프산업 및 피혁산업등에 이용할 수 있는 산업폐수처리 방법이다.The present invention is an industrial wastewater treatment method that can be used in textile dyeing industry, some food manufacturing industry, petrochemical industry, concrete manufacturing industry, pulp industry, leather industry, etc. to produce alkaline industrial wastewater.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910013754A KR950002113B1 (en) | 1991-08-09 | 1991-08-09 | Waste water treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910013754A KR950002113B1 (en) | 1991-08-09 | 1991-08-09 | Waste water treatment method |
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| Publication Number | Publication Date |
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| KR930004202A KR930004202A (en) | 1993-03-22 |
| KR950002113B1 true KR950002113B1 (en) | 1995-03-13 |
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| KR1019910013754A KR950002113B1 (en) | 1991-08-09 | 1991-08-09 | Waste water treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7820996B2 (en) | 2005-01-31 | 2010-10-26 | Samsung Electronics Co., Ltd. | Nonvolatile memory device made of resistance material and method of fabricating the same |
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1991
- 1991-08-09 KR KR1019910013754A patent/KR950002113B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7820996B2 (en) | 2005-01-31 | 2010-10-26 | Samsung Electronics Co., Ltd. | Nonvolatile memory device made of resistance material and method of fabricating the same |
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| KR930004202A (en) | 1993-03-22 |
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