KR100254701B1 - Treatment device for leachate containing high organic and ammonia nitrogen - Google Patents

Treatment device for leachate containing high organic and ammonia nitrogen Download PDF

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KR100254701B1
KR100254701B1 KR1019970061472A KR19970061472A KR100254701B1 KR 100254701 B1 KR100254701 B1 KR 100254701B1 KR 1019970061472 A KR1019970061472 A KR 1019970061472A KR 19970061472 A KR19970061472 A KR 19970061472A KR 100254701 B1 KR100254701 B1 KR 100254701B1
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tank
leachate
treatment apparatus
concentration
ammonia nitrogen
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KR1019970061472A
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KR19990040951A (en
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이의신
유희찬
박미경
박칠림
김용우
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장병주
주식회사대우
이일쇄
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
    • 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
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • 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
    • C02F2103/06—Contaminated groundwater or leachate

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  • 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)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

PURPOSE: A treatment equipment of leachate containing high concentration organic matter and ammonia nitrogen is provided, which can remove organic matter by 91 % as CODmn, 99 % as BOD and nitrogen by 70 %. CONSTITUTION: The system comprises the followings: (i) a control tank(1) for controlling pH of the influent water; (ii) an upflow anaerobic reaction tank(2) for removing biodegradable organic matter contained in the leachate; (iii) two anoxic tanks(3) for mixing the water of the anaerobic reactor(2) and recirculated leachate and for denitrifying nitric nitrogen contained in the leachate; (iv) two aeration tank(4) for nitrifying ammonia nitrogen contained in leachate discharged from the anoxic tank(3); (v) a settling tank(4-2) for recirculating the nitrified leachate to the anoxic tank(3); (vi) No.1 chemical coagulating tank(10) for primary settling by feeding cohesive agent and by adjusting pH to remove non-biodegradable organic matter; (vii) a Fenton oxidation tank(11) for oxidizing micro organic matter in wastewater by feeding catalyst and oxidizing agent; (viii) No.2 chemical coagulating tank(14) for coagulation settling by controlling pH; and (ix) a filter media packing tank(4-1) in which filter media is charged to enhance oxidation rate of ammonia nitrogen.

Description

고농도 유기물 및 암모니아성 질소가 포함된 침출수의 처리장치Leachate Treatment System Containing High Concentration Organic Matter and Ammonia Nitrogen

본 발명은 침출수 처리장치에 관한 것으로, 특히 도시폐기물 매립지에서 발생되는 고농도 유기물 및 암모니아성 질소가 포함된 침출수를 정화처리하는 침출수 처리장치에 관한 것이다.The present invention relates to a leachate treatment apparatus, and more particularly, to a leachate treatment apparatus for treating leachate containing high concentration organic matter and ammonia nitrogen generated in municipal waste landfill.

종래의 침출수 처리장치는 연중 다변화되는 침출수 성상에 대한 처리능력이 저조하여 만족할만한 수질을 얻지 못하였으며, 고농도 유기물질의 대부분을 재래식 혐기성 반응조의 능력부족으로 인해 호기성 처리에 의존함으로써, 긴 체류시간과 넓은 부지면적이 필요하며, 많은 에너지가 소비되었다. 이러한 조건에도 불구하고 유입수내 고농도의 질소는 거의 제거되지 않았으며, 난분해성 유기물질의 제거효율이 저조함으로 인해 화학약품에 대한 의존도가 높아 약품비가 과다하게 소모되는 문제점이 있었다.Conventional leachate treatment equipment has not been able to obtain satisfactory water quality due to the poor treatment capacity of leachate properties, which are varied throughout the year, and relying on aerobic treatment for most of the high concentration of organic materials due to the lack of capacity of conventional anaerobic reactors, A large area is required and a lot of energy is consumed. Despite these conditions, the high concentration of nitrogen in the influent was hardly removed, and due to low removal efficiency of hardly decomposable organic substances, high dependence on chemicals caused excessive consumption of chemical costs.

따라서, 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 본 발명은 성상이 다변화하는 침출수에 대해 상향류식 혐기성 공정을 적용하여 후속 공정(호기성 공정)에 안정된 수질을 공급하고, 고농도의 암모니아성 질소는 질산화 및 탈질공정을 통하여 제거하며, 난분해성 유기물질은 최적의 화학적 응집반응과 산화 반응을 통하여 높은 효율로 제거하여 최종 유출수가 양질의 수질을 갖도록 하는 침출수 처리장치를 제공하는데 그 목적이 있다.Therefore, the present invention devised to solve the problems of the prior art as described above, by applying an upflow anaerobic process to the leachate of varying properties, supplying stable water quality to the subsequent process (aerobic process), high concentration of ammonia nitrogen Is removed through nitrification and denitrification process, and the purpose of the present invention is to provide a leachate treatment apparatus to remove the hardly decomposable organic material with high efficiency through the optimum chemical flocculation reaction and oxidation reaction so that the final effluent has a good quality water.

제1도는 본 발명에 따른 침출수 처리장치의 구성도.1 is a block diagram of a leachate treatment apparatus according to the present invention.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1 : 조정조 2 : 상향류식 혐기성 반응조(UASB)1: Adjustment tank 2: Upflow anaerobic reactor (UASB)

3 : 무산소조 4 : 포기조3: anaerobic tank 4: abandon tank

4-1 : 여재 충진조 4-2 : 침전조4-1: filter medium filling tank 4-2: settling tank

5 : 슬러지 반송라인 6 : 호기성 유출수의 무산소조 반송라인5: sludge return line 6: aerobic tank return line for aerobic effluent

7 : 제1 급속교반조 8 : pH 조정조7: first rapid stirring tank 8: pH adjusting tank

9 : 제1 완속교반조 10 : 제1 약품침전조9: first slow stirring 10: first chemical precipitation

11 : 화학적 산화조(펜톤산화조) 12 : 제2 급속교반조11: chemical oxidation tank (Fenton oxidation tank) 12: second rapid stirring tank

13 : 제2 완속교반조 14 : 제2 약품침전조13: second slow stirring tank 14: second chemical precipitation tank

15 : 최종방류수15: final discharge water

상기 목적을 달성하기 위한 본 발명은, 고농도 유기물 및 암모니아성 질소가 포함된 침출수 처리장치에 있어서, 유입되는 침출수의 수소이온농도(pH)를 조정하고, 영양물질을 주입하는 조정조; 상기 조정조로부터 유입된 침출수내에 포함된 생분해성 유기물질을 제거하는 상향류식 혐기성 반응조; 상기 상향류식 혐기성 반응조로부터 유입된 침출수와 후단으로부터 반송된 침출수를 혼합하여 상기 침출수내에 포함된 질산성 질소를 탈질시키기 위한 무산소조; 상기 무산소조로부터 유입된 침출수내에 포함된 암모니아성 질소를 질산화시키는 포기조; 상기 포기조의 후단에 결합되며, 내부 반송라인을 통해 침전이후의 질산화된 침출수를 상기 무산수조로 반송시키는 침전조; 유입된 침출수내에 포함된 난분해성 유기물질을 제거하기 위해 응집제를 투입하고, 수소이온농도를 조정하여 교반을 통해 1차 침전시키는 제1 화학적 응집침전조; 촉매 및 산화제를 투입하여 상기 제1 응집침전수단으로부터 유입된 폐수중 미세 유기물질을 산화처리하는 펜톤산화조; 및 상기 펜톤산화조로부터 유입된 침출수의 수소이온농도(pH)를 조정하고, 교반을 통해 응집침전시키는 제2 화학적 응집 침전조를 구비하되, 상기 포기조와 상기 침전조 사이에 암모니아성 질소의 산화율을 높이기 위해 여재가 충진된 여재 충진조를 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a leachate treatment apparatus including a high concentration of organic matter and ammonia nitrogen, the adjusting tank for adjusting the hydrogen ion concentration (pH) of the influent leachate and injecting nutrients; An upflow anaerobic reactor for removing biodegradable organic substances contained in the leachate introduced from the adjustment tank; An oxygen-free tank for denitrifying nitrate nitrogen contained in the leachate by mixing the leachate introduced from the upflow anaerobic reactor and the leachate returned from the rear end; Aeration tank for nitrifying the ammonia nitrogen contained in the leachate introduced from the anoxic tank; A sedimentation tank coupled to the rear end of the aeration tank and returning the nitrified leachate after precipitation through the internal conveying line to the anaerobic tank; A first chemical flocculation sedimentation tank in which a flocculant is added to remove the hardly decomposable organic substances contained in the introduced leachate, and the hydrogen ion concentration is adjusted to first precipitate through stirring; A Fenton oxidation tank for oxidizing fine organic materials in the wastewater introduced from the first flocculation sedimentation means by adding a catalyst and an oxidizing agent; And a second chemical flocculation sedimentation tank which adjusts the hydrogen ion concentration (pH) of the leachate introduced from the fenton oxidation tank and coagulates and precipitates it by stirring, in order to increase the oxidation rate of ammonia nitrogen between the aeration tank and the precipitation tank. Characterized by comprising a filter filling tank filled with the filter medium.

이하, 첨부된 도면을 참조하여 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명에 따른 침출수 처리장치의 개략적인 구성을 나타낸 도면이다.1 is a view showing a schematic configuration of a leachate treatment apparatus according to the present invention.

국내의 폐기물 매립지에서 발생되는 침출수는 높은 알칼리도와 영양물질중 인(P)인 부족한 특성을 지니고 있다. 이에 따라 조정조(1)에서는 물과 염산(HCl)을 1:1로 희석한 용액을 이용하여 pH를 중성(pH 7)으로 조절하여 주고, 인이 함유된 KH2PO4을 투입하여 부족한 인(P)을 보충하여 준다. 그리고, 이렇게 처리된 침출수는 생분해성 유기물질을 제거하기 위한 상향류식 혐기성 반응조(UASB 반응조; 2)로 유입되는데, 조정조(1)에 의해 수소이온농도(pH)의 조정 및 인의 보층이 이루어짐으로써, 상향류식 혐기성 반응조내의 혐기성 미생물에 악영향이 미치지 않는다. pH의 조정은 반응조의 초기 안정화시에 필요하며, 반응조가 안정화된 후에는 pH 조정이 없어도 무방하다. 상향류식 혐기성 반응조(2)를 여러 운전 조건으로 실험한 결과, 가장 바람직하게는 체류시간 1일, 유기물부하 6 kg CODcr/m3/d 정도에서 BOD 제거효율이 95~98% 정도였다.Leachate from domestic landfills has high alkalinity and lack of phosphorus (P). Accordingly, in the adjusting tank 1, the pH is adjusted to neutral (pH 7) by using a solution of 1: 1 diluted water and hydrochloric acid (HCl), and the phosphorus-containing KH 2 PO 4 is added to the phosphorus (pH). Replenish P). In addition, the treated leachate is introduced into an upflow anaerobic reactor (UASB reactor; 2) for removing biodegradable organic substances, by adjusting the hydrogen ion concentration (pH) and adjusting the phosphorus layer by the adjusting tank (1), There is no adverse effect on the anaerobic microorganisms in the upflow anaerobic reactor. Adjustment of pH is necessary at the time of initial stabilization of the reaction tank, and there is no need to adjust pH after the reaction tank is stabilized. As a result of experimenting with the upflow anaerobic reactor 2 under various operating conditions, the BOD removal efficiency was about 95-98% at a residence time of 1 day and an organic load of about 6 kg CODcr / m3 / d.

상향류식 혐기성 반응조(2)에 의해 처리된 유출수는 무산소조(3)로 유입되어 질산성 질소의 탈질을 위하여 포기조 후단 침전조(4-2)에서 내부반송라인(6)을 통해 반송된 반송수와 혼합된다. 무산소조(3)에는 무산소조내의 미생물 농도를 유지시키기 위해 포기조(4) 후단의 침전조(4-2)의 슬러지가 반송라인(5)을 통해 유입된다. 무산소조(3)내의 용존산소(D0) 농도는 0.5mg/L 이하로 유지하도록 하며, 체류시간은 1~2일, MLSS(Mixed Liquor Suspended Solids) 3,000~5,000mg/L의 조건으로 운전한다. 한편, 포기조(4)에 의해 질산화된 유출수를 침전조(4-2) 이후에서 내부반송 라인(6)을 통해 무산수조(3)로 반송시켜 무산소조(3)에서 탈질 반응이 일어나도록 하였다. 본 발명에서 포기조(4)의 유출수를 침전조(4-2) 이후에서 반송시키는 이유는 상향류식 혐기성 반응조(2)내의 혐기성 미생물에 용존산소(DO)의 영향을 없게 하기 위함이다. 무산소조(3)내에서의 탈질반응에 필요한 탄소원은 상향류식 혐기성 반응조(2)로부터 유입된 유출수에 잔여하는 유기물질을 이용하고, 부족시 메탄올을 첨가하도록 한다.The effluent treated by the upflow anaerobic reactor (2) flows into the anoxic tank (3) and is mixed with the return water returned through the inner conveying line (6) in the after-stage settling tank (4-2) for denitrification of nitrate nitrogen. do. In the anaerobic tank 3, sludge of the settling tank 4-2 at the rear end of the aeration tank 4 is introduced through the conveying line 5 to maintain the concentration of microorganisms in the anaerobic tank 3. The dissolved oxygen (D0) concentration in the anoxic tank (3) is maintained at 0.5 mg / L or less, and the residence time is 1 to 2 days, MLSS (Mixed Liquor Suspended Solids) is operated under the conditions of 3,000 ~ 5,000 mg / L. On the other hand, the effluent nitrified by the aeration tank 4 was returned to the anoxic tank 3 through the internal transfer line 6 after the settling tank 4-2 so that the denitrification reaction occurred in the anoxic tank 3. The reason for returning the effluent of the aeration tank 4 after the settling tank 4-2 in the present invention is to avoid the influence of dissolved oxygen (DO) on the anaerobic microorganisms in the upflow anaerobic reaction tank (2). The carbon source required for the denitrification in the anoxic tank (3) uses organic substances remaining in the effluent flowing from the upflow anaerobic reactor (2), and methanol is added when there is a shortage.

상향류식 혐기성 반응조(2)에서 처리된 침출수는 무산소조(3)에서 탈질된 처리수와 혼합되어 암모니아성 질소의 질산화를 위한 포기조(4)로 유입된다. 포기조(4)는 유입된 침출수내의 암모니아성 질소를 질산화시키기 위하여 충분한 체류시간(약 5일 정도)을 가지며, 본 발명에서는 더욱더 질산화 효율을 높이기 위하여 포기조(4)의 후단에 미생물의 수를 늘리기 위한 여재를 투입한 여재 충진조(4-1)를 설치하였다. 포기조(4)에는 용존산소(DO) 농도를 2mg/L 이상으로 유지하기 위하여 공기를 공급하며, 질산화에 의한 pH 및 알칼리도의 강하를 막기 위해 중탄산나트륨을 첨가한다. pH는 6~8 정도, MLSS를 3,000~5,000mg/L 정도의 조건에서 운전한다. 이후 여재 충진조(4-1)를 통과한 침출수는 침전조(4-2)에서 침전되며, 침전된 슬러지는 반송라인(5)을 통해 무산소조(3)로 반송되고, 질산화된 유출수 중 일부는 내부 반송라인(6)을 통해 무산소조(3)로 반송된다.The leachate treated in the upflow anaerobic reactor 2 is mixed with the treated water denitrated in the anaerobic tank 3 and flows into the aeration tank 4 for nitrification of ammonia nitrogen. The aeration tank 4 has a sufficient residence time (about 5 days) to nitrify the ammonia nitrogen in the leachate introduced, and in the present invention, to increase the number of microorganisms at the rear end of the aeration tank 4 in order to further increase nitrification efficiency. A filter medium filling tank (4-1) in which filter medium was introduced was installed. The aeration tank 4 is supplied with air to maintain the dissolved oxygen (DO) concentration at 2 mg / L or more, and sodium bicarbonate is added to prevent the pH and alkalinity from dropping due to nitrification. pH is about 6 ~ 8, MLSS is operated at 3,000 ~ 5,000mg / L conditions. Thereafter, the leachate passing through the filter filling tank 4-1 is precipitated in the settling tank 4-2, and the precipitated sludge is returned to the anoxic tank 3 through the conveying line 5, and some of the nitrified effluent is internally It is conveyed to the anoxic tank 3 via the conveyance line 6.

본 발명의 실시예에서는 무산소조(3)와 포기조(4)를 각각 2개로 분리하였으나, 이는 모두 하나의 무산소조와 하나의 포기조로 구성될 수도 있다.In the embodiment of the present invention, the anaerobic tank 3 and the aeration tank 4 are separated into two, respectively, which may be composed of one anoxic tank and one aeration tank.

이와 같이 호기성 반응조를 거친 유출수는 생물학적 반응으로 제거 불가능한 난분해성 유기물질이 다량 포함되어 있으며, 이 난분해성 유기물질을 제거하기 위해서는 화학적 처리를 해야한다. 이를 위해서 본 발명에서는 첫단계로 응집침전 반응을 실시하였다.As such, the effluent from the aerobic reactor contains a large amount of hardly decomposable organic substances that cannot be removed by biological reactions, and chemically treated to remove the hardly degradable organic substances. To this end, in the present invention, a coagulation sedimentation reaction was carried out as a first step.

제1 화학적 응집침전조는 제1 급속교반조(7), pH 조정조(8), 제1 완속교반조(9), 제1 약품침전조(10)로 구성된다. 실험결과 여러 응집제 중 염화제2철(FeCl3)을 사용한 경우가 가장 우수하고 경제적이라는 결론을 얻어 본 발명에서는 이를 사용하였다.The first chemical flocculation tank comprises a first rapid stirring tank 7, a pH adjusting tank 8, a first slow stirring tank 9, and a first chemical precipitation tank 10. As a result of the experiment, the use of ferric chloride (FeCl 3 ) among the various flocculants was concluded that the best and economical was used in the present invention.

제1 급속교반조(7)에는 유입된 호기성 유출수에 염화제2철(FeCl3)을 투입하여 급속 교반시킨다. pH 조정조(8)에서는 황산을 이용하여 pH를 5정도로 유지시킨다. 본 발명의 실시예에서는 제1 급속 교반조(7)와 pH 조정조(8)를 회전속도 150rpm, 체류시간 5분의 조건으로 운전하였다.In the first rapid agitation tank (7), ferric chloride (FeCl 3 ) is added to the aerobic effluent flowing in, and rapidly stirred. In the pH adjusting tank 8, pH is maintained at about 5 using sulfuric acid. In the Example of this invention, the 1st rapid stirring tank 7 and the pH adjustment tank 8 were operated on the conditions of rotation speed 150rpm, and residence time 5 minutes.

이후 pH조정조(8)를 거친 유출수는 제1 완속교반조(9)로 유입되어 30rpm의 속도로, 20분의 체류시간동안 교반된 다음, 제1 약품침전조(10)에서 1시간 동안 침전시킨다. 본 반응에서 유출수에 포함된 난분해성 유기물질은 약 30~45% 정도 제거되며, 이후 화학적 산화조로 유입된다.After flowing through the pH adjusting tank (8) is introduced into the first slow stirring tank (9) and stirred at a speed of 30 rpm for 20 minutes, and then precipitated in the first chemical precipitation tank (10) for 1 hour. In this reaction, the hardly decomposable organic matter contained in the effluent is removed by about 30 to 45%, and then flows into the chemical oxidation tank.

화학적 산화는 과산화수소수(H2O2)와 황산철염(FeSO4)을 이용한 펜톤산화조(11)를 이용하였으며, 여러 조건실험을 통하여 두 물질의 최적비 1:1.25(무게비)을 얻었다. 화학적 산화조(11)는 200rpm, 체류시간 60분, pH 2~3 정도로 운전되었으며, 이후 다시 응집반응을 수행하였다. 이때 화학적 산화반응과 재응집침전 반응결과 난분해성 유기물질은 45%정도의 제거율을 나타내었다.For chemical oxidation, Fenton's oxidation tank (11) using hydrogen peroxide (H 2 O 2 ) and ferrous sulfate (FeSO 4 ) was used, and the optimum ratio of the two materials was obtained by various conditions. The chemical oxidation tank 11 was operated at 200 rpm, a residence time of 60 minutes, and a pH of 2 to 3, after which the coagulation reaction was performed again. At this time, as a result of the chemical oxidation reaction and the reaggregation sedimentation reaction, the hardly degradable organic material showed a removal rate of about 45%.

제2 화학적 응집침전조는 제2 급속교반조(12), 제2 완속교반조(13), 제2 약품침전조(14)로 이루어진다. 제2 화학적 응집침전조에서는 앞의 화학적 산화조(11)에서 낮아진 pH를 8.5이상으로 유지시키기 위해 수산화나트륨을 제2 급속교반조(12)에 투입하며, 제2 급속교반조(12)의 운전조건은 200rpm 속도, 체류시간 30분으로 하였다.The second chemical flocculation tank comprises a second rapid stirring tank 12, a second slow stirring tank 13, and a second chemical precipitation tank 14. In the second chemical flocculation tank, sodium hydroxide is added to the second rapid stirring tank 12 to maintain the pH lower than 8.5 in the previous chemical oxidation tank 11, and the operating conditions of the second rapid stirring tank 12 are maintained. The speed was 200 rpm and the residence time was 30 minutes.

제2 급속교반조(12)에서 처리된 유출수는 제2 완속교반조(13)로 유입되는데, 제2 완속교반조(13)에서 충분한 반응이 일어나도록 운전조건을 30rpm, 20분의 체류시간을 유지한다. 그런 다음, 최종 제2 약품침전조(14)에서 60분의 체류시간을 거친후 유출수는 최종방류된다.The effluent treated in the second rapid stirrer 12 is introduced into the second slow stirrer 13, and the residence time is set to 30 rpm and 20 minutes so that a sufficient reaction occurs in the second slow stirrer 13. Keep it. Then, after the residence time of 60 minutes in the final second chemical precipitation tank 14, the effluent is finally discharged.

상기와 같이 이루어진 본 발명에 의하면 유입된 침출원수는 전체적으로 유기물 제거효율이 CODmn로 91%, BOD로 99% 정도이며, 질소제거효율이 70%의 우수한 제거양상을 보여 종래의 방법에 비해 탁월한 효과를 보였다.According to the present invention made as described above, the inflow of leachate is 91% in CODmn, 99% in BOD, nitrogen removal efficiency is about 70%, showing excellent removal pattern compared to the conventional method has an excellent effect compared to the conventional method Seemed.

Claims (12)

고농도 유기물 및 암모니아성 질소가 포함된 침출수 처리장치에 있어서, 유입되는 침출수의 수소이온농도(pH)를 조정하고, 영양물질을 주입하는 조정조; 상기 조정조로부터 유입된 침출수내에 포함된 생분해성 유기물질을 제거하는 상향류식 혐기성 반응조; 상기 상향류식 혐기성 반응조로부터 유입된 침출수와 후단으로부터 반송된 침출수를 혼합하여 상기 침출수내에 포함된 질산성 질소를 탈질시키기 위한 무산소조; 상기 무산소조로부터 유입된 침출수내에 포함된 암모니아성 질소를 질산화시키는 포기조; 상기 포기조의 후단에 결합되며, 내부 반송라인을 통해 침전이후의 질산화된 침출수를 상기 무산소조로 반송시키는 침전조; 유입된 침출수내에 포함된 난분해성 유기물질을 제거하기 위해 응집제를 투입하고, 수소이온농도를 조정하여 교반을 통해 1차 침전시키는 제1 화학적 응집침전조; 촉매 및 산화제를 투입하여 상기 제1 응집침전수단으로부터 유입된 폐수 중 미세 유기물질을 산화처리하는 펜톤산화조; 및 상기 펜톤산화조로부터 유입된 침출수의 수소이온농도(pH)를 조정하고, 교반을 통해 응집침전시키는 제2 화학적 응집침전조를 구비하되, 상기 포기조와 상기 침전조 사이에 암모니아성 질소의 산화율을 높이기 위해 여재가 충진된 여재 충진조를 포함하는 것을 특징으로 하는 침출수 처리장치.An leachate treatment apparatus containing a high concentration of organic matter and ammonia nitrogen, the apparatus comprising: an adjusting tank for adjusting a hydrogen ion concentration (pH) of an influent leachate and injecting nutrients; An upflow anaerobic reactor for removing biodegradable organic substances contained in the leachate introduced from the adjustment tank; An oxygen-free tank for denitrifying nitrate nitrogen contained in the leachate by mixing the leachate introduced from the upflow anaerobic reactor and the leachate returned from the rear end; Aeration tank for nitrifying the ammonia nitrogen contained in the leachate introduced from the anoxic tank; A sedimentation tank coupled to the rear end of the aeration tank and returning the nitrified leachate after precipitation through the internal conveying line to the anoxic tank; A first chemical flocculation sedimentation tank in which a flocculant is added to remove the hardly decomposable organic substances contained in the introduced leachate, and the hydrogen ion concentration is adjusted to first precipitate through stirring; A Fenton oxidation tank for oxidizing the fine organic material in the wastewater introduced from the first flocculation sedimentation means by adding a catalyst and an oxidizing agent; And a second chemical flocculation sedimentation tank for adjusting the hydrogen ion concentration (pH) of the leachate introduced from the fenton oxidation tank and flocculating sedimentation through stirring, to increase the oxidation rate of ammonia nitrogen between the aeration tank and the precipitation tank. Leachate treatment apparatus comprising a filter medium filled with the filter medium. 제1항에 있어서, 상기 조정조에는, 물과 염산을 희석한 용액으로 수소이온농도를 중성으로 조절하고, 인을 보충하기 위해 시약을 투입하는 것을 특징으로 하는 침출수 처리장치.The leachate treatment apparatus according to claim 1, wherein the adjusting tank is prepared by neutralizing hydrogen concentration with a solution of dilute water and hydrochloric acid, and adding a reagent to replenish phosphorus. 제1항에 있어서, 상기 상향류식 혐기성 반응조는, 체류시간 약 1일, 유기물부하 약 6 kg CODcr/m3/d 조건으로 운전되는 것을 특징으로 하는 침출수 처리장치.The leachate treatment apparatus according to claim 1, wherein the upflow anaerobic reactor is operated under a condition of about 1 day of residence time and about 6 kg CODcr / m3 / d of organic matter load. 제1항에 있어서, 상기 무산소조는, 미생물의 농도를 유지시키기 위해 상기 침전조에서 발생된 슬러지를 반송라인을 통해 유입받고, 상기 침전조에서 방류되는 질산화된 침출수를 내부반송라인을 통해 유입받는 것을 특징으로 하는 침출수 처리장치.According to claim 1, wherein the oxygen-free tank, the sludge generated in the settling tank to maintain the concentration of the microorganism is introduced through the conveying line, characterized in that the nitrified leachate discharged from the settling tank is received through the inner conveying line. Leachate treatment apparatus. 제4항에 있어서, 상기 무산소조는, 탈질반응에 필요한 탄소원으로 유기물질을 이용하고, 부족시 메탄올을 첨가하는 것을 특징으로 하는 침출수 처리장치.The leachate treatment apparatus according to claim 4, wherein the oxygen-free tank uses an organic material as a carbon source for denitrification, and adds methanol when insufficient. 제5항에 있어서, 상기 무산소조는, 용존산소(DO) 농도를 약 0.5mg/L 이하로 유지하고, 체류시간은 약 1 내지 2일, MLSS를 약 3,000~5,000mg/L의 조건으로 운전되는 것을 특징으로 하는 침출수 처리장치.The method of claim 5, wherein the anoxic tank maintains a dissolved oxygen (DO) concentration of about 0.5 mg / L or less, the residence time is about 1 to 2 days, the MLSS is operated under the conditions of about 3,000 to 5,000 mg / L Leachate treatment apparatus, characterized in that. 제4항에 있어서, 상기 포기조는, 용존산소(DO) 농도를 약 2mg/L 이상으로 유지하기 위하여 공기를 공급하며, 질산화에 의한 수소이온농도(pH) 및 알칼리도의 강하를 막기 위해 중탄산나트륨을 첨가하는 것을 특징으로 하는 침출수 처리장치.The method of claim 4, wherein the aeration tank is supplied with air to maintain a dissolved oxygen (DO) concentration of about 2 mg / L or more, and sodium bicarbonate to prevent a drop in pH and alkalinity due to nitrification Leachate treatment apparatus characterized in that the addition. 제1항에 있어서, 상기 제1 화학적 응집침전조는, 응집제를 투입하여 소정의 속도로 소정의 시간동안 급속교반되는 제1 급속교반조; 상기 제1 급속교반조로부터 유입된 침출수의 pH농도를 조정하기 위해 황산을 투입하여 소정의 속도로 소정의 시간동안 교반되는 pH 조정조; 상기 pH 조정조로부터 유입된 폐수를 소정의 속도로 소정의 시간동안 교반하여 침전성이 높아지도록 입자크기를 증가시키는 제1 완속교반조; 및 상기 제1 완속교반조로부터 유입된 폐수의 응집된 입자를 침전시키는 제1 약품침전조를 구비한 것을 특징으로 하는 침출수 처리장치.The method of claim 1, wherein the first chemical flocculation tank comprises: a first rapid agitation tank which is rapidly stirred for a predetermined time at a predetermined speed by adding a flocculant; A pH adjusting tank which is stirred for a predetermined time at a predetermined rate by adding sulfuric acid to adjust the pH concentration of the leachate introduced from the first rapid stirring tank; A first slow stirring tank for increasing the particle size so as to increase precipitation by stirring the wastewater introduced from the pH adjustment tank at a predetermined speed for a predetermined time; And a first chemical precipitation tank for depositing aggregated particles of wastewater introduced from the first slow stirring tank. 제8항에 있어서, 상기 제1 급속교반조에 투입되는 응집제는 염화제2철(FeCl3)인 것을 특징으로 하는 침출수 처리장치.The leachate treatment apparatus according to claim 8, wherein the flocculant added to the first rapid stirring tank is ferric chloride (FeCl 3 ). 제1항에 있어서, 상기 펜톤산화조는 산화제로 과산화수소수와 촉매로 황산철염을 이용하는 것을 특징으로 하는 침출수 처리장치.The leachate treatment apparatus according to claim 1, wherein the fenton oxidation tank uses hydrogen peroxide water as an oxidant and ferrous sulfate as a catalyst. 제8항에 있어서, 상기 제2 화학적 응집침전조는, 상기 펜톤산화조로부터 유입된 폐수의 pH농도를 조정하고, 소정의 속도로 소정의 시간동안 급속교반하는 제2 급속교반조; 상기 급속교반조로부터 유입된 침출수를 소정의 속도로 소정의 시간동안 교반하여 침전성이 높아지도록 입자크기를 증가시키는 제2 완속교반조; 및 상기 제2 완속교반조로부터 유입된 폐수의 응집된 입자를 침전시키는 제2 약품침전조를 구비한 것을 특징으로 하는 침출수 처리장치.9. The method of claim 8, wherein the second chemical flocculation tank comprises: a second rapid stirring tank for adjusting the pH concentration of the wastewater introduced from the fenton oxidation tank and rapidly stirring for a predetermined time at a predetermined rate; A second slow stirring tank for increasing the particle size such that the leachate flowing from the rapid stirring tank is stirred at a predetermined speed for a predetermined time to increase the settling property; And a second chemical precipitation tank for depositing aggregated particles of wastewater introduced from the second slow stirring tank. 제11항에 있어서, 상기 제2 급속교반조는, 수산화나트륨을 이용하여 pH농도를 약 pH 8.5 이상으로 조정하는 것을 특징으로 하는 침출수 처리장치.12. The leachate treatment apparatus of claim 11, wherein the second rapid agitation bath adjusts the pH to about pH 8.5 or higher using sodium hydroxide.
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