KR20010105510A - Method for treating waste water with steel slag - Google Patents

Method for treating waste water with steel slag Download PDF

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Publication number
KR20010105510A
KR20010105510A KR1020000025360A KR20000025360A KR20010105510A KR 20010105510 A KR20010105510 A KR 20010105510A KR 1020000025360 A KR1020000025360 A KR 1020000025360A KR 20000025360 A KR20000025360 A KR 20000025360A KR 20010105510 A KR20010105510 A KR 20010105510A
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South Korea
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wastewater
wastewater treatment
slag
flocculant
steelmaking slag
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KR1020000025360A
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Korean (ko)
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KR100345405B1 (en
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오옥수
오상윤
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오옥수
오상윤
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature 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

Abstract

Oral drug compositions or oral medicines wherein the unpleasant tastes inherent in drugs are masked, specifically, granules, powders and syrups decreased in unpleasant tastes by masking and each containing a basic drug tasting unpleasant and an anionic high-molecular substance such as carrageenan.

Description

제강 슬래그를 이용한 폐수처리방법{Method for treating waste water with steel slag}Wastewater treatment method using steel slag {Method for treating waste water with steel slag}
본 발명은 제강 슬래그(slag)를 이용한 폐수처리방법에 관한 것으로서, 더욱 상세하게는 아토마이징(attomizing) 처리된 제강 슬래그(이하 "슬래그 볼"-slag ball-이라 칭함) 또는 산화칼슘(CaO)이 다량 함유된 산업폐기물인 제강 슬래그를 이용하여 폐수의 부유혼탁물질을 단시간내에 입경이 큰 플럭(flock)으로 응집시킴으로써 별도의 응집·침전을 위한 농축조 및 고액분리장치의 설치 없이 기존 장치로 유기물을 효과적으로 제거할 수 있는 폐수처리방법에 관한 것이다.The present invention relates to a wastewater treatment method using a steelmaking slag, and more specifically, the atomizing steelmaking slag (hereinafter referred to as "slag ball" -slag ball-) or calcium oxide (CaO) is By using steelmaking slag, which is a large amount of industrial waste, agglomerates the suspended turbid material in the wastewater into a large particle sized flock within a short time, and effectively removes organic matter with existing equipment without installing a thickening tank and solid-liquid separator for separate flocculation and sedimentation. It relates to a wastewater treatment method that can be removed.
일반적으로 폐수처리방법은 생물학적 분해가 가능한 유기물질을 산화시키는 생물학적 처리방법과, 부유물질 및 유기물질을 제거하고 산화시키는 물리화학적 처리방법으로 나뉘는데, 독성 및 난분해성 유기물질의 농도가 높은 침출수, 산업폐수 및 축산폐수의 경우 생물학적 처리방법으로는 독성 및 난분해성 유기물질을 만족할 만한 수준으로 제거하지 못하였고, 유기물질의 부하를 줄이고 독성 및 난분해성 물질을 응집, 침전, 막분리, 흡착 등의 방법으로 제거시키는 물리학적 처리방법으로도 폐수의 배출허용기준을 만족시키기에는 경제적ㆍ기술적으로 어려움이 많았다.In general, wastewater treatment methods are divided into biological treatment methods for oxidizing biodegradable organic substances, and physicochemical treatment methods for removing and oxidizing suspended substances and organic substances, which have high concentrations of toxic and hardly degradable organic substances. In the case of wastewater and livestock wastewater, biological treatment did not remove toxic and hardly degradable organic substances to a satisfactory level, and reduced the load of organic materials and aggregated, precipitated, membrane separated and adsorbed the toxic and hardly degradable materials. Even with the physical treatment method to remove wastewater, it was economically and technically difficult to satisfy the discharge limit of wastewater.
따라서, 폐수처리장치의 설치비 및 운영비를 절감하면서도 폐수처리효율을 높일 수 있는 다양한 방법들이 연구되었는데, 철염 또는 알루미늄염 등의 응집제를 폐수에 투입시켜 응축ㆍ침전된 오염물질들을 제거시킨 후 처리수를 방류시키는 폐수처리방법도 그 중의 하나이다.Therefore, various methods to improve the wastewater treatment efficiency while reducing the installation and operation costs of the wastewater treatment device have been studied. The flocculant such as iron salt or aluminum salt is added to the wastewater to remove condensed and precipitated contaminants, and then the treated water is The wastewater treatment method to discharge is also one of them.
그러나, 상기 응집제 투입방법은 오염물질이 효과적으로 응집될 수 있도록 폐수의 pH를 조절하는 것이 용이하지 않으며, 철염을 응집제로 사용하는 경우에는 폐수중의 유기물 제거효과는 비교적 우수하나 처리 후 잔류철염에 의해 폐수가 착색되는 문제점이 있었으며, 알루미늄염을 응집제로 사용하는 경우에는 처리 후 폐수의 색도가 양호하기는 하나 처리시 발생하는 잔류 알루미늄에 의해 상수가 오염될 우려가 있었으며 응집물의 강도가 약하여 쉽게 부숴지기 쉽고 가벼워서 침강속도가 느리며 함수율이 높아 탈수가 용이하지 않은 문제점이 있었다.However, the method of adding the flocculant is not easy to adjust the pH of the wastewater so that contaminants can be effectively flocculated, and when iron salt is used as the flocculant, the organic matter is effectively removed in the wastewater, but the residual iron salt is treated after treatment. There was a problem that the waste water is colored, and when aluminum salt is used as a flocculant, the waste water after the treatment has good chromaticity, but there is a possibility that the water may be contaminated by the residual aluminum generated during the treatment, and the strength of the aggregate is weak and easily broken. Easy and light, there was a problem that the sedimentation rate is slow and the moisture content is not easy because of high moisture content.
본 발명자는 본 발명자의 선등록특허 제98062호(미국특허등록 제5,417,738호, 일본특허등록 제2,521,030호)에 제시되어 있는 슬래그 볼(아토마이징 처리된 제강 슬래그)이 안정한 스피넬(spinel)형의 2CaO·Fe2O3복합산화물을 형성하는 것임에 착안하여 종래의 응집제에 비해 환경친화적이면서도 보다 신속하고 효율적으로 폐수처리를 할 수 있는 응집제로서 산업폐기물인 제강 슬래그를 이용한 본 발명을 완성하게 되었다.The inventors of the present invention have a spinel type 2CaO which is stable in slag balls (atomized steelmaking slag), which is presented in the inventors' registered patent no. Considering the formation of Fe 2 O 3 composite oxide, the present invention has been completed by using steelmaking slag, which is an industrial waste, as an flocculant that can treat wastewater more environmentally and more quickly and efficiently than a conventional flocculant.
본 발명은 상기와 같은 종래의 문제점들을 해결하기 위해 안출된 것으로서, 폐수중의 유기물을 효율적으로 제거하면서도 처리비용이 저렴한 폐수처리방법을 제공하는 것을 목적으로 한다.The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a wastewater treatment method which is effective in removing organic matter in wastewater and having a low treatment cost.
본 발명의 다른 목적은 유기물질의 응집속도가 빠르고 응집물의 강도가 강하며 응집물의 함수율을 최소화하여 탈수가 용이한 폐수처리방법을 제공하는 것이다.It is another object of the present invention to provide a wastewater treatment method in which the aggregation rate of organic substances is fast, the strength of the aggregates is strong, and the dehydration is easy by minimizing the moisture content of the aggregates.
본 발명의 또 다른 목적은 풍부한 양으로 대량 생산되는 산업폐기물을 재활용하는 폐수처리방법을 제공하는 것이다.It is another object of the present invention to provide a wastewater treatment method for recycling industrial waste mass produced in abundant quantities.
본 발명의 상기와 같은 목적들은 슬래그 볼 또는 산화칼슘(CaO)이 다량 함유된 산업폐기물인 제강 슬래그를 이용하는 폐수처리방법을 제공함으로써 달성되는데, 본 발명에 의한 폐수처리방법은 유기물질의 응집속도가 빠르고 응집물의 강도가 강하여 폐수처리작업이 보다 신속하고 용이하게 이루어지므로 경제적이고 간단한 조작으로 최종 처리수를 현행방류수질기준으로 방출시킬수 있다.The above object of the present invention is achieved by providing a wastewater treatment method using steelmaking slag which is an industrial waste containing a large amount of slag ball or calcium oxide (CaO), the wastewater treatment method according to the present invention is characterized in that The fast and cohesive strength makes wastewater treatment faster and easier, so it is possible to release the final treated water on the basis of current discharge water quality by economical and simple operation.
도 1은 본 발명의 폐수처리공정도.1 is a wastewater treatment process diagram of the present invention.
본 발명은 폐수에 응집제를 투입시켜 유기물을 제거하는 폐수처리방법에 있어서, 슬래그 볼 또는 산화칼슘(CaO)이 다량 함유된 산업폐기물인 제강 슬래그 미세분말을 코팅제의 역할을 하는 기존 응집제와 혼합하여 폐수처리장치에 투입시킨 후 전자석이 설치된 폐수처리장치의 하부 저면에 유기물이 응집·침전되면 상부의 처리수를 방류시키는 것을 특징으로 하는 폐수처리방법에 관한 것이다.The present invention is a wastewater treatment method for removing organic matter by adding a flocculant to the wastewater, by mixing the steelmaking slag fine powder, which is an industrial waste containing a large amount of slag ball or calcium oxide (CaO) with the existing flocculant serving as a coating wastewater The present invention relates to a wastewater treatment method comprising discharging the treated water at an upper portion when organic matter is agglomerated and precipitated on a lower surface of a wastewater treatment apparatus provided with an electromagnet after being introduced into the treatment apparatus.
이하 본 발명을 도면을 참조하여 상세히 설명하고자 하나, 본 발명이 이에한정되는 것은 물론 아니다.Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.
먼저 도 1에 도시된 바와 같이 폐수처리장치에 폐수를 유입시킨 후 기존 응집제로 코팅된 슬래그 볼 또는 제강 슬래그를 투입하여 폐수 중의 유기물을 응집시킨다.First, as shown in FIG. 1, the wastewater is introduced into the wastewater treatment device, and then the slag ball or steelmaking slag coated with the existing flocculant is added to agglomerate the organic matter in the wastewater.
이 때, 상기 슬래그 볼 또는 제강 슬래그는 미세분말화하여 투입할수록 폐수와 접촉되는 반응표면적이 넓어져 폐수처리효율이 높아지며, 코팅제로 작용하는 기존 응집제는 슬래그 볼 또는 제강 슬래그의 3∼10 중량로 첨가되는 것이 바람직하다.At this time, the slag ball or steelmaking slag is finely powdered and added, the reaction surface area in contact with the wastewater becomes wider and the wastewater treatment efficiency is increased, and the existing flocculant acting as a coating agent is added as 3 to 10 weight of the slag ball or steelmaking slag. It is desirable to be.
일반적인 제강 슬래그는 하기 표 1과 같은 화학성분으로 구성되어 있다.Typical steelmaking slag is composed of the chemical components shown in Table 1 below.
제강용 전로에서 발생하는 슬래그의 화학성분 (단위:)Chemical Constituents of Slag from Steel Converters (Unit :)
FeOFeO Fe2O3 Fe 2 O 3 SiO2 SiO 2 CaOCaO Al2O3 Al 2 O 3 MgOMgO P2O5 P 2 O 5 SS
≤1≤1 22∼3522 to 35 7∼107-10 36∼4336-43 ≤1≤1 6∼96-9 1∼21 to 2 ≤0.06≤0.06
본 발명의 실시에서 투입되는 제강 슬래그로는 아토마이징 처리를 거친 제강 슬래그인 슬래그 볼이 바람직한데, 제강 슬래그를 수중 또는 물이 분사되는 분사기류내로 통과시켜 아토마이징 처리를 하면 용융상태로 균일하게 분포되어 있던 칼슘 이온(Ca2+), 산소 이온(O2-), 철 이온(Fe2+) 등이 응고되어 2개의 산화물과 3가의 산화물의 복합체인 안정한 스피넬(spinel)형의 2CaO·Fe2O3복합산화물을 형성하기 때문인데, 이와 같이 안정된 구조의 복합산화물에 유기물이 흡착되면 아토마이징 처리를 하지 않은 일반 슬래그에 유기물이 흡착되었을 때보다 응집물의 응집속도가빠르고 응집물의 강도 또한 강하게 된다.The steelmaking slag introduced in the practice of the present invention is preferably a slag ball, which is a steelmaking slag that has undergone atomization treatment. Calcium ions (Ca 2+ ), oxygen ions (O 2- ), iron ions (Fe 2+ ), etc. that have been solidified to form a stable spinel type 2CaO · Fe 2 that is a complex of two oxides and a trivalent oxide. This is because the O 3 composite oxide is formed. When the organic material is adsorbed to the composite oxide having the stable structure, the aggregation rate of the aggregate is faster and the strength of the aggregate is stronger than when the organic material is adsorbed to the non-atomic slag.
그러나, 일반적인 제강(製鋼) 과정중에 발생되는 슬래그도 산화칼슘(CaO)을 다량 함유하므로 폐수처리효율이 떨어지는 점을 고려하여 고급 정수가 아닌 일반 생활용수로의 정수시에 사용될 수 있다.However, since the slag generated during the general steelmaking process also contains a large amount of calcium oxide (CaO), it can be used in water purification to general living water instead of high-grade water purification in consideration of low wastewater treatment efficiency.
상기 응집 반응은 슬래그 볼 또는 제강 슬래그를 코팅하고 있는 (+) 이온의 기존 응집제가 (-) 이온을 띠고 있는 부유물(유기물)들을 끌어당김으로써 슬래그 볼 또는 제강 슬래그가 핵의 역할을 하여 응집된 부유물을 빠른 시간내에 침전시키며 침전물의 부피를 현저히 축소시키는 것이다.The flocculation reaction is carried out by the existing flocculant of (+) ions coating the slag ball or the steelmaking slag attracts the suspended matter (organic matter) bearing the negative (-) ions, the flocculant suspended by the slag ball or steelmaking slag acts as a nucleus This precipitates quickly and significantly reduces the volume of the precipitate.
이때, 상기 플럭을 형성한 오염물질들은 철 성분을 함유하는 제강 슬래그 응집제에 흡착되어 있으므로 폐수처리장치의 하부 저면에 전자석을 설치하면 전자석의 자력에 이끌려 플럭의 폐수처리장치 하부로의 침강속도가 매우 빨라지게 되며, 일단 침전된 플럭 또한 전자석의 자력에 의해 쉽게 상부로 부유되거나 흩어지지 못하고 안정적으로 고착되므로 고액분리가 매우 용이하게 되어 처리수 방류후에 전자석의 전원을 끄고 침전물을 제거하면 된다.At this time, the contaminants forming the floc are adsorbed by the steel-making slag flocculant containing iron, so when the electromagnet is installed on the bottom of the wastewater treatment device, the flocculation rate of the floc to the bottom of the wastewater treatment device is very high. Once the floc is settled is also not easily suspended or scattered to the top by the magnetic force of the electromagnet is easily fixed because the solid-liquid separation is very easy to turn off the electromagnet after discharge of the treated water and remove the sediment.
따라서, 본 발명에 따르면 폐수를 처리함에 있어 폐수내의 부유성의 점토입자, 유기성 콜로이드, 일부 중금속 등을 대상으로 하는 별도의 전처리 및 중화처리 과정없이 슬래그 볼 또는 제강슬래그와 소량의 기존 응집제의 첨가만으로도 단시간내에 유기물을 응집시켜 매우 안정한 상태의 플럭으로 침강시킬 수 있으며, 종래 응집제만을 첨가하였을 때 생성되는 플럭 또는 슬러지 양의 1/10 정도밖에 되지 않는 현저히 감소된 양의 플럭만이 생성되어, 상기 플럭이 제거된 처리수는 유입된폐수에 비해 용존산소량이 30∼50까지 증가하게 된다.Therefore, according to the present invention, in addition to the addition of slag balls or steelmaking slag and a small amount of existing flocculant in a short time in the treatment of wastewater, there is no separate pretreatment and neutralization process for floating clay particles, organic colloids, some heavy metals, etc. in the wastewater. It is possible to flocculate organic matter in the precipitate and settle into a very stable floc, and only a significantly reduced amount of floc, which is about 1/10 of the amount of floc or sludge produced when only a conventional flocculant is added, is generated. The removed treated water will increase the dissolved oxygen content by 30-50 compared with the introduced wastewater.
본 발명의 실시에 있어서 슬래그 볼 또는 제강 슬래그를 코팅하는 역할을 하는 응집제는 종래의 공지된 것으로서 (+) 이온을 띠고 있는 것이면 충분하며 특별히 한정되지 않는다.In the practice of the present invention, the flocculant which serves to coat the slag ball or the steelmaking slag is conventionally known as long as it has positive ions and is not particularly limited.
또한, 응집제에 의해 생성되는 플럭의 침강성을 향상시키기 위하여 응집제와 함께 폴리머(polymer)를 첨가할 수 있는데, 응집제 투입으로 생성된 미세한 플럭들이 폴리머의 작용에 의해 서로 완만하게 결착되어 강도가 크고 입경이 큰 플럭으로 빠른 시간내에 응집되므로 처리수의 색도가 더 맑아지며 폐수처리효율도 높아진다. 이러한 폴리머로는 양이온, 음이온, 폴리양이온성 고분자를 예로 들 수 있는데, 그 중에서도 실리콘이 첨가되는 것이 가장 바람직하다.In addition, a polymer may be added together with the flocculant in order to improve the settling properties of the flocs formed by the flocculant. The fine flocs formed by the flocculant input are gently bound to each other by the action of the polymer to have high strength and particle size. The larger the floccules, the faster the agglomerates, resulting in a clearer color of the treated water and higher efficiency in the wastewater treatment. Examples of such polymers include cation, anion, and polycationic polymers. Among them, silicone is most preferably added.
이하, 본 발명을 실시예를 들어 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to Examples.
실시예Example
실시예 1Example 1
저면에 전자석이 설치된 탱크내에 공단지역의 폐수 1000㎖를 넣고 슬래그 볼 미세분말 30g과, 기존 응집제 1.5g을 혼입하여 응집물을 침전시킨 후 그 상층액을 분리하였다.In a tank equipped with an electromagnet at the bottom, 1000 ml of wastewater in the satin area was mixed with 30 g of slag ball fine powder and 1.5 g of the existing flocculant to precipitate the aggregate, and the supernatant was separated.
하기 표 2은 상기 실시예 1의 폐수처리 결과로서 원폐수와 처리수의 수질을 비교한 것이다.Table 2 below compares the quality of raw wastewater and treated water as the wastewater treatment result of Example 1.
폐수명Waste life 측정항목Metric 원폐수Wastewater 처리수Treated water 처리효율Processing efficiency
공장폐수Factory wastewater pHpH 8.68.6 8.18.1
COD(ppm)COD (ppm) 28.028.0 5.25.2 81.481.4
BOD(ppm)BOD (ppm) 19.319.3 4.44.4 77.277.2
실시예 2Example 2
탱크 저면에 전자석을 설치하지 않은 것을 제외하고는 실시예 1과 동일한 조건으로 폐수처리를 하였다.Wastewater treatment was carried out under the same conditions as in Example 1 except that the electromagnet was not installed on the bottom of the tank.
폐수 처리 후 처리수의 BOD와 COD는 실시예 1과 동일하였으나 플럭의 응집ㆍ침강속도가 실시예 1보다 느렸고 상층액 분리시 다소 어려움이 있었다.BOD and COD of the treated water after the wastewater treatment were the same as in Example 1, but the flocculation and sedimentation rate of the floc was slower than that of Example 1, and there was a difficulty in separating the supernatant.
실시예 3Example 3
저면에 전자석이 설치된 탱크내에 생활오수가 함유된 폐수 1000㎖를 넣고 슬래그 볼 미세분말 25g과 기존 응집제 0.75g을 혼입하여 응집물을 침전시킨 후 그 상층액을 분리하였다.In a tank equipped with electromagnets on the bottom, 1000 ml of wastewater containing living sewage was added, and 25 g of slag ball fine powder and 0.75 g of a conventional coagulant were mixed to precipitate the aggregate, and the supernatant was separated.
하기 표 3은 상기 실시예 3의 폐수처리 결과로서 원폐수와 처리수의 수질을 비교한 것이다.Table 3 below compares the quality of raw wastewater and treated water as a wastewater treatment result of Example 3.
폐수명Waste life 측정항목Metric 원폐수Wastewater 처리수Treated water 처리효율Processing efficiency
생활오수Sewage pHpH 8.28.2 7.27.2
COD(ppm)COD (ppm) 17.317.3 3.43.4 80.380.3
BOD(ppm)BOD (ppm) 11.811.8 1.91.9 83.983.9
실시예 4Example 4
저면에 전자석이 설치된 탱크내에 축산 폐수 1000㎖를 넣고 슬래그 볼 미세분말 30g과 기존 응집제 2.4g과 폴리머 20g을 혼입하여 응집물을 침전시킨 후 그 상층액을 분리하였다.1000 ml of livestock wastewater was placed in a tank equipped with an electromagnet at the bottom, and 30 g of slag ball fine powder, 2.4 g of existing coagulant, and 20 g of polymer were precipitated to precipitate an aggregate, and the supernatant was separated.
하기 표 4은 상기 실시예 4의 폐수처리 결과로서 원폐수와 처리수의 수질을 비교한 것이다.Table 4 below compares the quality of raw wastewater and treated water as a wastewater treatment result of Example 4.
폐수명Waste life 측정항목Metric 원폐수Wastewater 처리수Treated water 처리효율Processing efficiency
축산폐수Livestock Wastewater pHpH 8.68.6 8.38.3
COD(ppm)COD (ppm) 28.028.0 5.25.2 81.481.4
BOD(ppm)BOD (ppm) 19.319.3 2.82.8 85.585.5
상기 표 2, 3, 4에 나타난 바와 같이 본 발명에 의한 폐수처리과정을 거친 폐수는 폐수내 COD,BOD가 현저히 감소되어 높은 폐수처리효율을 나타내었다.As shown in Tables 2, 3, and 4, the wastewater undergoing the wastewater treatment process according to the present invention showed a significant reduction in COD and BOD in the wastewater.
실시예 5Example 5
저면에 전자석이 설치된 탱크내에 생활오수가 함유된 폐수 1000㎖를 넣고 아토마이징 처리를 하지 않은 일반 제강 슬래그 미세분말 40g과, 기존 응집제 3.2g을 혼입하여 응집물을 침전시킨 후 그 상층액을 분리하였다.In a tank equipped with electromagnets on the bottom, 1000 ml of wastewater containing living sewage was mixed, and 40 g of general steel slag fine powder, which had not been atomized, and 3.2 g of the existing flocculant were mixed to precipitate the aggregate, and the supernatant was separated.
하기 표 5은 상기 실시예 5의 폐수처리 결과로서 원폐수와 처리수의 수질을 비교한 것이다.Table 5 below compares the quality of raw wastewater and treated water as the wastewater treatment result of Example 5.
폐수명Waste life 측정항목Metric 원폐수Wastewater 처리수Treated water 처리효율Processing efficiency
생활오수Sewage pHpH 8.28.2 7.77.7
COD(ppm)COD (ppm) 17.317.3 4.54.5 74.074.0
BOD(ppm)BOD (ppm) 11.811.8 3.33.3 72.072.0
상기 실시예 5에서는 아토마이징 처리를 하지 않은 일반 제강 슬래그를 사용하였기 때문에 안정된 상태의 플럭이 침전되었던 실시예 3보다 폐수처리 효과가 낮았으나, 현행방류수질기준으로 방출시킬 수는 있었다.In Example 5, the wastewater treatment effect was lower than that of Example 3, in which a stable floc was precipitated because general steelmaking slag without an atomizing treatment was used, but it could be discharged based on the current discharge water quality standard.
본 발명에 의한 폐수처리방법은 부유물질 처리 및 유기물질 제거효율이 종래보다 매우 높으며, 대량 생산되는 산업폐기물인 제강 슬래그를 응집제로 이용함으로써 산업폐기물을 재활용하여 환경오염을 방지하고 폐수처리비용을 절감하는 효과가 있다.The wastewater treatment method according to the present invention has a much higher efficiency of removing suspended solids and removing organic substances, and by using steelmaking slag, which is a mass-produced industrial waste, as a flocculant, industrial waste is recycled to prevent environmental pollution and reduce wastewater treatment costs. It is effective.
또한, 본 발명에 의한 폐수처리방법은 유기물질의 응집속도가 빠르고 응집물의 강도가 강하며 응집물의 함수율이 매우 낮으므로 별도의 응집·침전을 위한 농축조 및 고액분리장치의 설치 없이도 응집물 플럭을 효과적으로 제거할 수 있다.In addition, the wastewater treatment method according to the present invention effectively removes the flocculant flocs without installing a concentrator and solid-liquid separator for the flocculation and sedimentation because the aggregation rate of the organic material is fast, the strength of the flocculation is very strong, and the moisture content of the flocculation is very low. can do.
따라서, 폐수처리작업이 보다 신속하고 용이하게 이루어지므로 경제적이고 간단한 조작으로 최종 처리수를 현행방류수질기준으로 방출시킬 수 있다.Therefore, since the wastewater treatment operation is made more quickly and easily, the final treated water can be discharged based on the current discharge water quality standard by economical and simple operation.

Claims (4)

  1. 폐수에 응집제를 투입시켜 유기물을 제거하는 폐수처리방법에 있어서, 아토마이징(attomizing) 처리된 제강 슬래그(슬래그 볼) 또는 산화칼슘(CaO)이 다량 함유된 산업폐기물인 제강 슬래그 미세분말을 응집제와 혼합하여 폐수처리장치에 투입시킨 후 전자석이 설치된 폐수처리장치의 하부 저면에 유기물질이 응집·침전되면 상부의 처리수를 방류시키는 것을 특징으로 하는, 제강 슬래그를 이용한 폐수처리방법.In the wastewater treatment method for removing organic matter by adding coagulant to the wastewater, the steelmaking slag fine powder, which is an industrial waste containing atomizing steelmaking slag (slag ball) or calcium oxide (CaO), is mixed with the coagulant. And into the wastewater treatment device, and then discharge the treated water in the upper part when organic substances are aggregated and precipitated on the lower surface of the wastewater treatment device in which the electromagnet is installed, wastewater treatment method using steelmaking slag.
  2. 제1항에 있어서, 응집제는 슬래그 볼 또는 제강 슬래그의 3∼10 중량로 첨가되는 것을 특징으로 하는, 제강 슬래그를 이용한 폐수처리방법.The wastewater treatment method using steelmaking slag according to claim 1, wherein the flocculant is added at 3 to 10 weight of the slag ball or the steelmaking slag.
  3. 제1항에 있어서, 응집제에 폴리머(polymer)가 더욱 첨가되는 것을 특징으로 하는, 제강 슬래그를 이용한 폐수처리방법.The wastewater treatment method using steelmaking slag according to claim 1, wherein a polymer is further added to the flocculant.
  4. 제3항에 있어서, 폴리머(polymer)가 실리콘인 것을 특징으로 하는, 제강 슬래그를 이용한 폐수처리방법.The wastewater treatment method using steelmaking slag according to claim 3, wherein the polymer is silicon.
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KR100342766B1 (en) * 2000-11-16 2002-07-03 권형기 Remediation method of contaminated substances using subsidiary reactive barriers having blast furnace slag or steel manufacturing slag
KR20020092619A (en) * 2001-06-05 2002-12-12 김창균 Method for the physical and chemical coagulation and flocculation treatment water and wastewater using a slag and a fly ash
KR100385417B1 (en) * 2000-06-22 2003-05-27 주식회사 건양기술공사 건축사사무소 Apparatus for Advanced Treatment of BOD in Sewage and Dirty Water
KR100436396B1 (en) * 2002-01-29 2004-06-16 주식회사 포스코건설 Method and apparatus for making resources out of organic sludge through solidification and stabilization
WO2006123921A1 (en) * 2005-05-20 2006-11-23 Ecomaister Co., Ltd. Concrete composition containing atomized steelmaking slag and concrete blocks using the concrete composition
KR100746753B1 (en) * 1998-08-28 2007-08-06 에자이 알앤드디 매니지먼트 가부시키가이샤 Medicinal compositions with relieved bitterness, etc.

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KR100345405B1 (en) * 2000-05-12 2002-07-24 오옥수 Method for treating waste water with steel slag
CN102153201A (en) * 2011-05-12 2011-08-17 武汉金伟利环保工程有限公司 Electromagnetism sewage-treatment system and electromagnetism sewage-treatment method
CN105417782A (en) * 2015-12-09 2016-03-23 华东理工大学 Method for using steel slag micro-powder as crystal nucleuses to strengthen wastewater phosphorous removal
CN106745449A (en) * 2016-11-30 2017-05-31 燕山大学 A kind of steel wastewater cleanser and preparation method thereof
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JPS6147573B2 (en) * 1983-05-06 1986-10-20 Kogyo Gijutsu Incho
JPS61271087A (en) * 1985-05-27 1986-12-01 Nippon Kokan Kk <Nkk> Treatment of waste water containing phosphate
KR960000058B1 (en) * 1993-06-03 1996-01-03 오옥수 Method for recovering metal included in the slag generated from steel making process
KR100345405B1 (en) * 2000-05-12 2002-07-24 오옥수 Method for treating waste water with steel slag

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KR100746753B1 (en) * 1998-08-28 2007-08-06 에자이 알앤드디 매니지먼트 가부시키가이샤 Medicinal compositions with relieved bitterness, etc.
KR100385417B1 (en) * 2000-06-22 2003-05-27 주식회사 건양기술공사 건축사사무소 Apparatus for Advanced Treatment of BOD in Sewage and Dirty Water
KR100342766B1 (en) * 2000-11-16 2002-07-03 권형기 Remediation method of contaminated substances using subsidiary reactive barriers having blast furnace slag or steel manufacturing slag
KR20020092619A (en) * 2001-06-05 2002-12-12 김창균 Method for the physical and chemical coagulation and flocculation treatment water and wastewater using a slag and a fly ash
KR100436396B1 (en) * 2002-01-29 2004-06-16 주식회사 포스코건설 Method and apparatus for making resources out of organic sludge through solidification and stabilization
WO2006123921A1 (en) * 2005-05-20 2006-11-23 Ecomaister Co., Ltd. Concrete composition containing atomized steelmaking slag and concrete blocks using the concrete composition

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