KR0149978B1 - Advanced waste water treatment process by noxn removal from return activated sludge - Google Patents
Advanced waste water treatment process by noxn removal from return activated sludge Download PDFInfo
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- KR0149978B1 KR0149978B1 KR1019950002373A KR19950002373A KR0149978B1 KR 0149978 B1 KR0149978 B1 KR 0149978B1 KR 1019950002373 A KR1019950002373 A KR 1019950002373A KR 19950002373 A KR19950002373 A KR 19950002373A KR 0149978 B1 KR0149978 B1 KR 0149978B1
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- C—CHEMISTRY; METALLURGY
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Abstract
본 발명은 하수, 축산폐수, 인분뇨 및 공장폐수 등의 폐수처리공정에서 반송슬러지 내의 질산화물의 제거를 위해 분뇨 등을 주입하는 개량된 하·폐수의 처리방법에 관한 것이다. 농도가 낮은 하수에서 인제거 미생물의 활성이 낮아지며, 인제거 미생물의 활성을 높이는 데에는 복잡한 공정이 필요하고, 이에 따라 처리비용이 높은 종래기술의 문제점을 해결하기 위하여, 혐기조(An)로의 반송 이전에, 무산소조(Axr)에서 침전지(Sed)로부터의 반송슬러지에 분뇨 등을 혼합하여 반송슬러지의 질산화물을 제거시켜 폐수처리공정에서의 인제거 미생물을 활성화시킴으로써 영양소(질소,인) 제거효과를 크게 높인 것이다. 공정이 간단하고 추가시설이 거의 불필요하여 운전비용이 저렴한 효과가 있다.The present invention relates to an improved method for treating sewage and wastewater in which manure and the like are injected for removal of nitrates in a return sludge in wastewater treatment processes such as sewage, livestock wastewater, phosphorus and plant wastewater. The activity of the phosphorus-removing microorganisms is lowered in low concentration sewage, and the complex process is required to increase the activity of the phosphorus-removing microorganisms, and thus, to solve the problems of the prior art, which has a high treatment cost, prior to the return to the anaerobic tank (An). , By mixing manure with return sludge from sedimentation tank (Sed) in an anoxic tank (Axr) to remove nitrates from the return sludge, activating phosphorus removal microorganisms in the wastewater treatment process to greatly enhance the nutrient (nitrogen, phosphorus) removal effect . Simple operation and almost no additional facilities are required, resulting in low operating costs.
Description
본 발명은 반송슬러지 내의 질산화물의 제거에 의한 개량된 하·폐수의 처리방법(Advanced Wasteater Treatment Process by NOxN Removal from Return Activated sludge), 보다 상세하게는 반송슬러지를 분뇨 등과 혼합하여 반송슬러지의 질산화물(NOxN)을 감소시켜서 하수,축산폐수,인분뇨, 및 공장폐수의 인제거 미생물을 활성화시킴으로써 영양소제거 효과를 크게 높일 수 있는 개량된 하·폐수처리방법에 관한 것이다.The present invention provides an improved method for treating wastewater by removal of nitrates in the returning sludge, more specifically, the returning sludge by mixing the returning sludge with manure and the like (NOxN). The present invention relates to an improved sewage / wastewater treatment method that can greatly increase the nutrient removal effect by activating phosphorus-removing microorganisms in sewage, livestock wastewater, manure, and factory wastewater.
폐수를 처리하여 방류함에 있어서는 폭기조 내에서 인(phosphorus)제거미생물, 탈질소화(denitrifization)미생물, 질산화미생물, 탄소물질제거미생물을 성장시켜서 영양소와 탄소물질을 제거하는 공정이 채택되고 있다.In the discharge of wastewater by treatment, phosphorus removal microorganisms, denitrification microorganisms, nitrification microorganisms, and carbon material removal microorganisms are grown to remove nutrients and carbon materials in the aeration tank.
인제거 미생물은 혐기성 조건에서 쉽게 분해 가능한 탄소물질을 섭취하고 인을 방출하며, 호기성 조건에서는 섭취된 탄소물질을 분해한 후 이를 에너지원으로 사용하여 다량의 인을 섭취하는 성질을 가지고 있는데, 이러한 성질을 이용하여 폐수 중의 인을 제거 하는 것이다.Phosphorus-removing microorganisms consume carbonaceous substances that are easily decomposed under anaerobic conditions and release phosphorus.In aerobic conditions, the phosphorus-decomposing microorganisms consume large amounts of phosphorus by decomposing ingested carbonaceous materials and using them as energy sources. To remove phosphorus from wastewater.
또한, 질소는 질산화→탈질소화 과정을 거쳐 제거되는데, 인제거 미생물과 탈질소화 미생물은 공통적으로 탄소물질을 섭취하는 경쟁관계에 있고 대체로 인제거 미생물이 탈질소화 미생물에 비해 열세이며, 특히 농도가 낮은 하수에서는 인제거 미생물을 보호하는 조치(폐수처리시설의 설계)가 필요하다.In addition, nitrogen is removed through nitrification to denitrification. Phosphorus and denitrification microorganisms are in common competition with carbon intake, and phosphorus removal microorganisms are generally inferior to denitrification microorganisms, and are particularly low in concentration. In sewage, measures (design of wastewater treatment plants) to protect the phosphorus-free microorganisms are needed.
인제거 미생물의 위와 같은 성질을 이용하여 폐수 중의 인을 제거하는 방법의 하나가 제1도의 (a)에 도시되어 있다. 제1도의 (a)의 공법은 혐기조(An)에 유입되는 폐수에 침전조(Sed)로부터 반송된 슬러지를 혼합하여 인제거 미생물의 활성을 높임으로써 혐기조(An)와 폭기조(Ox)를 거치는 과정에서 인제거 효율을 높이는 방법(이하 A/O 공법이라 함)이며, BOD가 150mg/l 내외에서 효과적인 것으로 알려져 있다.One method of removing phosphorus from wastewater using the above properties of the phosphorus removing microorganism is shown in FIG. In the process of FIG. 1 (a), the wastewater flowing into the anaerobic tank (An) is mixed with the sludge returned from the sedimentation tank (Sed) to increase the activity of the phosphorus-removing microorganism, thereby passing through the anaerobic tank (An) and the aeration tank (Ox). It is a method of improving phosphorus removal efficiency (hereinafter referred to as A / O method), and BOD is known to be effective at around 150mg / l.
제1도의 (a)의 A/O 공법에서 질소제거 효율을 높이기 위해 인제거 미생물이 섭취하고 남은 잉여탄소물질을 이용하여 질산화→탈질소화 공정을 추가한 방법이 제1도의 (b)에 도시되어 있다. 제1도의 (b)의 공법에서는 혐기조(An)와 폭기조(Ox) 사이에 무산소조(Ax)(용존산소는 없으나 질산화물 NOxN은 있음)를 만들어서, 침전조(Sed)로 이송되는 폭기조(Ox) 방출수의 일부를 무산소조(Ax)로 반송하여 탈질소화 작용을 촉진시키는 방법 (이하 A2/O 공법이라 함)이다.In the A / O process of FIG. 1 (a), a method of adding nitrification to denitrification using the excess carbon material ingested by the phosphorus-removing microorganism in order to increase nitrogen removal efficiency is shown in FIG. have. In the process of FIG. 1 (b), an aerobic tank (Ax) (no dissolved oxygen but NOxN is present) is formed between the anaerobic tank (An) and the aeration tank (Ox), and the aeration tank (Ox) discharged water is transferred to the settling tank (Sed). A part of is returned to an anoxic tank (Ax) to promote denitrification (hereinafter referred to as A 2 / O process).
이러한 A2/O 공법의 결점, 즉 탈질작용의 부족에 따른 반송슬러지 내에서의 인제거 미생물의 성장 저해를 해결하기 위한 방법이 제1도의 (c)의 공법으로서, 이 공법에서는 2개의 무산소조(Ax1,Ax2)를 연설하여 폭기조(Ox) 방출수를 제2무산소조(Ax2)에 탈질 반송하고, 침전슬러지를 제1무산소조(Ax1)로 반송하여 NOxN을 제거시킨 후 혐기조(An)로 다시 반송시킨다(이하 MUCT/VIP 공법이라 함). 이 MUCT/VIP 공법은 인제거 미생물과 탈질소화 미생물을 함께 존재하도록 하여도 별로 문제가 없는 높은 농도의 하수뿐만 아니라 낮은 농도의 하수에도 적합하다.The method for solving the disadvantages of the A 2 / O method, namely, the inhibition of growth of phosphorus-removing microorganisms in the return sludge due to the lack of denitrification, is the method of FIG. 1 (c). In this method, two anaerobic tanks ( Ax1 and Ax2) are addressed to denitrify and return the aeration tank (Ox) discharged water to the second anoxic tank (Ax2). (Hereinafter referred to as the MUCT / VIP method). The MUCT / VIP process is suitable for low concentrations of sewage as well as high concentrations of sewage, which can cause both phosphorus-free and denitrified microbes to coexist.
또, MUCT/VIP 공법의 문제점, 즉 공정이 복잡하고 처리비용이 높은 점을 해결 하기 위하여 1차 침전조의 하수 슬러지를 혐기 발효시켜 탄소물질을 발생시킨 것을 무산소조(Ax)나 혐기조(An)에 투입하여 인제거 미생물과 탈질소화 미생물의 활성을 높이는 방법도 있다.(이하 MUCT/VIP의 변형공법이라 함).In addition, in order to solve the problems of MUCT / VIP method, that is, the process is complicated and the treatment cost is high, the anaerobic fermentation of sewage sludge of the primary sedimentation tank is introduced into the anoxic tank (Ax) or anaerobic tank (An). There is also a method to increase the activity of phosphorus-removing microorganisms and denitrification microorganisms (hereinafter referred to as MUCT / VIP modification method).
그러나, 상기한 A/O 공법에서는 질소제거 효율이 낮다는 단점이 있다.However, the A / O method has a disadvantage of low nitrogen removal efficiency.
또, 상기 A/O 공법의 단점을 해결하기 위한 A2/O 공법은 탄소물질이 부족하면 탈질반송에 의해서도 탈질소화 미생물에 의한 탈질작용이 충분히 이루어지지 않으므로 반송슬러지 내에 NOxN(질산화물)이 남게 되며, 이처럼 NOxN이 남아 있는 슬러지가 인제거 미생물의 성장이 보장되어야 하는 혐기조(An)로 반송되어 인제거 미생물의 성장을 저해하는 단점이 있다.In addition, in the A 2 / O method to solve the disadvantages of the A / O method, the denitrification by the denitrification microorganism is not enough by the denitrification transport if the carbon material is insufficient, NOxN (nitrogen oxide) is left in the conveying sludge. As such, the sludge in which NOxN remains is returned to an anaerobic tank (An) in which growth of the phosphorus-removing microorganism is to be guaranteed, thereby inhibiting the growth of the phosphorus-removing microorganism.
그리고, MUCT/VIP 공법은 인제거 미생물을 보호하는데 효과적인 방법이나 그 공정이 복잡하고 처리비용이 높은 것이 문제점으로 되어 있다. 이러한 문제를 해결하고자 시도하였던 MUCT/VIP의 변형된 공법의 경우에도 MUCT/VIP 공법의 문제점을 완전히 해소하지 못해 여전히 공정이 복잡하고 처리비용이 증가되는 결점을 가지고 있다.In addition, the MUCT / VIP method is an effective method to protect the phosphorus-removing microorganisms, but the process is complicated and the processing cost is high. Even in the case of the modified method of MUCT / VIP which attempted to solve this problem, the problem of the MUCT / VIP method is not completely solved and still has the disadvantage of complicated process and increased processing cost.
본 발명의 목적은 상기한 종래기술의 문제점을 해결하기 위한 것으로, 간단한 공정과 구조로서 공정중에 인분뇨 또는 혼합물을 투입하여 특히 인제거 미생물의 활성을 높임으로서 폐수의 영양소(질소,인)을 효과적으로 제거할 수 있는 개량된 폐수처리방법을 제공하는데 있다.An object of the present invention is to solve the above-mentioned problems of the prior art, and as a simple process and structure, by adding phosphorus manure or a mixture during the process, in particular, by effectively increasing the activity of the phosphorus-removing microorganisms, nutrients (nitrogen, phosphorus) of the wastewater are effectively An improved wastewater treatment method is provided.
본 발명의 다른 목적은 인분뇨를 다른 폐수와 혼합하여 처리할 수 있는 개량된 하·폐수의 처리방법을 제공하는데 있다.Another object of the present invention is to provide an improved method for treating sewage and wastewater, which can be treated by mixing manure with other wastewater.
제1도의 (a)(b)(c)는 각각 종래의 폐수처리방법의 흐름도.(A), (b), and (c) of FIG. 1 each show a flow chart of a conventional wastewater treatment method.
제2도는 본 발명의 제1실시예의 흐름도.2 is a flow chart of a first embodiment of the present invention.
제3도는 본 발명의 제2실시예의 흐름도.3 is a flow chart of a second embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
An : 혐기조 Ax1,Axr : 무산소조An: Anaerobic tank Ax1, Axr: Anaerobic tank
Ox : 폭기조 Sed : 침전조Ox: Aeration Tank Sed: Sedimentation Tank
본 발명은 상기 목적을 달성하기 위하여, 하수, 축산폐수, 공장폐수 또는 하수와 축산폐수, 하수와 인분뇨, 하수와 공장폐수가 혐기조, 무산소조, 폭기조, 침전조 등을 포함하는 일련의 처리공정을 거치게 한 후 침전조의 반송슬러지를 혐기조로 반송 이전에 무산소조에서 인분뇨, 인분뇨와 같은 고농도 유기성 폐액을 혼합하거나 본 처리공정의 1차침전조의 슬러지, 농축조 또는 혐기성소화조의 상징액을 혼합하여 반송슬러지 내의 질산화물을 미리 제거한 후 반송하여 인제거 미생물의 활성화에 따른 영양소의 효율적인 제거가 이루어지도록 하는 방법을 특징으로 한다.The present invention, in order to achieve the above object, sewage, livestock wastewater, factory wastewater or sewage and livestock wastewater, sewage and phosphorus, sewage and factory wastewater is subjected to a series of treatment processes, including anaerobic tank, anaerobic tank, aeration tank, sedimentation tank, etc. After returning the return sludge of the settling tank to the anaerobic tank, the nitric oxide in the return sludge is removed in advance by mixing high concentration organic waste liquids such as phosphate and phosphate in the anoxic tank, or the supernatant of the first settling tank of this treatment process, or the supernatant of the anaerobic digestion tank. After the return is characterized in that the efficient removal of nutrients according to the activation of the phosphorus-removing microorganisms are made.
이와 같이 인분뇨와 여타 유기성 폐액을 무산소조에서 반송슬러지에 혼합하게 되면, 탈질소화 미생물과 인제거 미생물이 반송슬러지 내의 탄소물질을 효과적으로 섭취하여 활성상태로 성장케 하는 조건을 만들어 주는 바, 그 섭취에 따른 에너지를 이용하여 탈질작용을 가속화시키게 되고, 이로 인해 반송슬러지 내의 질산화물이 제거된다. 이렇게 되면 탈질소화 미생물과 인제거 미생물은 상기 질산화물 제거과정에 의하여 활성화된 상태이기 때문에 이후의 처리과정에서 영양소 제거 효과가 크게 높아 진다. 특히 분뇨의 경우 중력식 주입이 가능하여 운전이 단순하고 운전비용이 매우 적게 소요된다.As such, when manure and other organic waste liquids are mixed with the return sludge in an anoxic tank, denitrification microorganisms and phosphorus removing microorganisms effectively ingest the carbon material in the return sludge and make them grow in an active state. Energy is used to accelerate the denitrification, which removes nitrates in the conveying sludge. In this case, since the denitrification microorganism and the phosphorus removing microorganism are activated by the nitric oxide removal process, the nutrient removal effect is greatly increased in subsequent processing. In the case of manure, gravity injection is simple, so operation is simple and operation costs are very low.
이하, 본 발명의 실시예를 첨부된 도면에 의하여 설명한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
제2도는 본 발명의 제1실시예를 나타낸 흐름도 이다. 이에 따르면 하수, 축산폐수, 인분뇨, 공장폐수 또는 이들의 혼합폐수를 일련의 처리조들, 즉 혐기조(An)→무산소조(Ax1)→폭기조(Ox)→침전조(Sed)을 거치면서 처리되도록 하고, 폭기조(Ox)를 거친 처리물의 일부를 다시 무산소조(Ax1)으로 반송하는 기본처리라인을 구축하고, 이러한 처리라인에 본 발명을 구체적으로 실현하기 위하여 혐기조(An)의 앞에 무산소조(Axr)을 설치한다.2 is a flowchart showing a first embodiment of the present invention. According to this, sewage, livestock waste, manure, factory waste or mixed waste water are treated through a series of treatment tanks, namely anaerobic tank (An) → anaerobic tank (Ax1) → aeration tank (Ox) → sedimentation tank (Sed). A basic treatment line for returning a part of the treated material having the aeration tank Ox back to the anoxic tank Ax1 is constructed, and an anaerobic tank Axr is installed in front of the anaerobic tank An in order to concretely implement the present invention. .
그리고 침전조(Sed)에서 반송되는 반송슬러지를 인분뇨와 혼합되게 되는데, 이러한 혼합은 혐기조(An)에 이송하기 전에 무산소조(Axr)에서 이루어지도록 한 것이다.And the return sludge returned from the settling tank (Sed) is to be mixed with the manure manure, this mixing is to be made in the anoxic tank (Axr) before the transfer to the anaerobic tank (An).
이렇게 함으로써 반송슬러지와 인분뇨의 혼합에 의한 질산화물의 제거효과가 증대되고, 질산화물이 혐기조에 투입되는 것이 방지되며, 종래의 MUCT/VIP 공법에 비해 반송슬러지에서 질산화물을 제거하는 장치 및 운전이 간단해지고 전력비가 절감된다.This increases the removal effect of nitrates by mixing the return sludge and phosphorus manure, prevents the introduction of nitrates into the anaerobic tank, and the device and operation for removing nitrates from the return sludge compared to the conventional MUCT / VIP method, and the operation cost is simplified. Is reduced.
제3도은 본 발명의 제2실시예를 나타내는 흐름도로서, 일반적인 하수처리 계통에서의 하수 또는 하수와 인분뇨의 혼합폐수를 처리함에 있어서, 반송슬러지에 인분뇨와 같은 고농도 유기성 폐액을 혼합하거나, 반송슬러지에 1차 침전조의 슬러지, 농축조 또는 혐기성소화조의 상징액을 혼합하는 폐수처리방법이다.FIG. 3 is a flow chart showing a second embodiment of the present invention. In the treatment of sewage or a mixed wastewater of sewage and phosphorus in a general sewage treatment system, a high concentration of organic waste liquid such as phosphorus manure is mixed with the conveying sludge, or Wastewater treatment method that mixes the supernatant of the first settling tank sludge, thickening tank or anaerobic digestion tank.
제3도에서 하수 또는 하수와 분뇨의 혼합폐수가 스크린조(Scr), 침사지(Gr)를 거쳐 1차침전지(Sed1)에서 침전되고 혐기조(An) 및 폭기조(Ox)에서 탄소물질과 영양소가 제거된 후 처리수는 방류되고, 슬러지는 2차침전지(Sed2)에 침전된다. 2차침전지(Sed2)의 슬러지는 농축조(Th)로 옮겨져서 농축되고, 농축슬러지는 혐기성소화조(An/Df)에서 처리하여 탈수한 후 매립하게 된다.In Figure 3, sewage or mixed wastewater of sewage and manure is precipitated in the primary sedimentation cell (Sed1) via screen tank (Scr) and settling basin (Gr) and carbon material and nutrients are removed in anaerobic tank (An) and aeration tank (Ox). After that, the treated water is discharged and the sludge is precipitated in the secondary settling cell Sed2. The sludge of the secondary sedimentation battery (Sed2) is transferred to a concentration tank (Th) and concentrated, and the concentrated sludge is treated in an anaerobic digestion tank (An / Df) and dewatered and then landfilled.
본 발명은 이러한 처리공정에서 2차침전지(Sed2)와 혐기조(An), 그리고 1차침전지(Sed1)와 혐기조(An)의 사이에 별도의 무산소조(An)가 피드백 라인을 형성하도록 설치하고, 2차침전지(Sed2)의 슬러지를 혐기조(An)에 반송하기에 앞서 인분뇨와 같은 정도의 고농도 유기성 폐액, 분뇨, 농축조(Th)의 상징액, 혐기성소화조(An/Df)의 상징액, 1차침전지(Sed1)의 슬러지 등을 무산소조(Axr)로 반송하여 혼합함으로써 반송슬러지에 포함된 질산화물이 제거되고, 이로 인해 혐기조(An) 이후의 과정에서 영양소, 특히 인의 제거효율이 증대된다.The present invention is installed in such a processing step so that the secondary ancillary cells (Sed2) and anaerobic tank (An), and a separate anoxic tank (An) to form a feedback line between the primary settler battery (Sed1) and anaerobic tank (An), 2 Prior to returning the sludge from the SED2 to the anaerobic tank (An), high concentration organic waste, manure, the supernatant of the thickening tank (Th), the supernatant of the anaerobic digestion tank (An / Df), and the primary sedimentation battery (Sed1) By returning and mixing the sludge and the like in an anoxic tank (Axr) to remove the nitrate contained in the conveying sludge, this increases the efficiency of removing nutrients, in particular phosphorus in the process after the anaerobic tank (An).
하수 또는 하수와 인분뇨의 폐수처리장에서는 탄소물질과 영양소(질소와 인)의 제거공정이 중요한데, 본 발명은 영양소, 그 중에서도 인제거효율을 높인다. 본 실시예에서는 처리할 하수 또는 축산폐수 혹은 인분뇨와 같은 고농도 유기성 폐액의 일부를 인분뇨 대신 또는 인분뇨와 함게 반송슬러지에 혼합할 수 있다. 반송슬러지에는 1차 침전조의 슬러지, 또는 농축조나 혐기성소화조의 상징액을 혼합하여도 인분뇨와 같은 고농도 유기성 폐액을 혼합하는 것과 유사한 효과를 얻을 수 있었다. 따라서, 인분뇨가 없거나 부족한 경우에 효과적인 처리방법이 될 수 있다.In the wastewater treatment plant of sewage or sewage and phosphorus manure, the removal process of carbon material and nutrients (nitrogen and phosphorus) is important, and the present invention improves nutrients, especially phosphorus removal efficiency. In this embodiment, a portion of the high concentration organic waste liquid such as sewage or livestock waste to be treated or manure manure can be mixed in the return sludge instead of or with manure manure. The return sludge, or the supernatant of the thickening tank or the anaerobic digestion tank, could be similarly mixed with the high concentration of organic waste liquid such as manure. Therefore, it can be an effective treatment in the absence or lack of manure.
이하의 표에서는 본 발명의 공법과 종래기술들의 특성을 효과적인 측면에서 비교실험한 것으로서, 각 함유물질의 제거효율과 탈질반송율, 혐기조(An)의 NOxN영향, 그리고 유지관리와 그 비용에 대한 비교결과를 나타낸다.The following table is a comparative experiment of the characteristics of the method and the prior art of the present invention in terms of effective, the removal efficiency and denitrification rate of each contained material, the effect of NOxN of the anaerobic tank (An), and the maintenance and cost comparison results Indicates.
상기 표에서 보는 바와 같이 종래 공법에 의한 하수처리시 탄소물질 제거효율은 90% 내외로서, 처리수질은 20mg/l를 상회하고 있으며 영양소의 경우 평균 50% 이하의 낮은 처리효율을 나타내고 있다. 특히 낮은 농도의 하수에서는 질소와 인의 제거효율이 더욱 떨어지는 단점이 있다.As shown in the above table, the removal efficiency of carbonaceous materials in the sewage treatment by the conventional method is about 90%, the treated water quality is higher than 20mg / l, and in the case of nutrients, the treatment efficiency is lower than 50% on average. In particular, sewage at low concentrations has a disadvantage in that the removal efficiency of nitrogen and phosphorus is further reduced.
그러나 본 발명의 경우에는 95% 이상의 탄소물질 제거효과가 있으며, 반송슬러지 내의 질산화물(NOxN) 농도를 2mg/l 이하로 감소시킴으로써 인제거 미생물활성이 우수한 것을 확인하였고, 이로 인해 78~80% 이상의 높은 영양소 처리효율을 나타내었다.However, in the case of the present invention has a carbon material removal effect of more than 95%, by reducing the nitrogen oxide (NOxN) concentration in the return sludge to less than 2mg / l was confirmed that the excellent phosphorus removal microbial activity, due to this high 78 ~ 80% Nutrient treatment efficiency was shown.
본 발명은 이와 같이 비교적 간단한 공정과 구조로서 폐수의 영양소를 효과적으로 제거 할 수 있으며, 질산화물 슬러지의 탈질반송을 높이지 않는 대신 액상폐기물인 분뇨 또는 처리중인 폐수의 일부를 활용함으로써 유지관리가 용이할 뿐만 아니라 유지관리비가 저렴하게 소요괸다는 이중의 효과를 얻을 수 있다. 특히 인분뇨를 다른 폐수와 혼합하여 처리할 수 있는 장점이 있는 것이다.The present invention can effectively remove the nutrients of the wastewater with such a relatively simple process and structure, and does not increase the denitrification transport of the nitrate sludge, but facilitates maintenance by utilizing a part of the wastewater being treated as liquid waste manure or wastewater being treated. In addition, the dual effect of low maintenance costs can be obtained. In particular, there is an advantage that can be treated by mixing manure with other waste water.
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| KR100796168B1 (en) * | 2006-08-23 | 2008-01-21 | 주식회사 에이케이케이 | Treatment process using biodegradable organic pollutants and functional carriers capable of decomposing inorganic nitrogen and phosphorus compounds. |
| KR100838846B1 (en) * | 2007-02-23 | 2008-06-17 | 주식회사 포스코건설 | Method for treating recycle water of wastewater treatment |
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| CN106746346A (en) * | 2017-01-10 | 2017-05-31 | 江苏新泓济环保科技有限公司 | Integrated XHBF efficient dephosphorizations Small Town Wastewater processing equipment |
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