KR100836661B1 - Porous media for autotrophic denitrification using sulfur - Google Patents

Porous media for autotrophic denitrification using sulfur Download PDF

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KR100836661B1
KR100836661B1 KR1020070056625A KR20070056625A KR100836661B1 KR 100836661 B1 KR100836661 B1 KR 100836661B1 KR 1020070056625 A KR1020070056625 A KR 1020070056625A KR 20070056625 A KR20070056625 A KR 20070056625A KR 100836661 B1 KR100836661 B1 KR 100836661B1
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sulfur
alkalinity
autotrophic denitrification
porous carrier
rock wool
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Korean (ko)
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김지형
지원현
김종태
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고려대학교 산학협력단
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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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C02F3/107—Inorganic materials, e.g. sand, silicates
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/104—Granular carriers
    • 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
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
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  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract

A porous media for autotrophic denitrification using sulfur and a method for manufacturing the same are provided, wherein the porous media has an increased specific surface area to easily perform a biological denitrifying operation. In a porous media for autotrophic denitrification using sulfur, which is used in water treatment, the porous media comprises a mixture of a sulfur powder, an alkalinity-substituting material, pulverized rock wool, and nutrients required for the growth of denitrifying microorganisms. The alkalinity-substituting material is limestone(CaCO3) or shell. The nutrients include KH2PO4, NaHCO3, MgCl2, and FeSO4. A method for manufacturing a porous media for autotrophic denitrification using sulfur comprises the steps: (a) adding an alkalinity-substituting material such as limestone and shell to a sulfur powder, and adding finely pulverized rock wool and nutrients required for the growth of denitrifying microorganisms to the mixture; (b) heating a mixture of the step(a) to a temperature of 130 to 150 deg.C, and agitating the mixture to form a uniform slurry; and (c) slowly cooling the slurry of the step(b) in cooling water to form a spherical media with a diameter of 2 to 5 mm. Further, a mass ratio of KH2PO4:NaHCO3:MgCl2:FeSO4 is 10:4:2:1 to 12:6:4:1.

Description

황을 이용한 독립영양 탈질용 다공성 담체 {Porous media for autotrophic denitrification using sulfur}Porous carrier for autotrophic denitrification using sulfur {Porous media for autotrophic denitrification using sulfur}

도 1은 본 발명에 따른 다공성 담체의 제조 공정도이다.1 is a manufacturing process chart of the porous carrier according to the present invention.

도 2는 본 발명에 따른 개선된 다공성 담체의 모식도이다.2 is a schematic diagram of an improved porous carrier according to the present invention.

도 3a는 황으로만 이루어진 담체의 표면 SEM 사진이다.Figure 3a is a SEM image of the surface of the carrier consisting only of sulfur.

도 3b는 황과 CaCO3만으로 이루어진 담체의 표면 SEM 사진이다.Figure 3b is a SEM image of the surface of the carrier consisting of sulfur and CaCO 3 only.

도 3c는 본 발명에 따른 개선된 다공성 담체의 표면 SEM 사진이다.3C is a SEM image of the surface of an improved porous carrier according to the present invention.

본 발명은 황을 이용한 독립영양 탈질용 다공성 담체에 관한 것으로, 더욱 구체적으로 수처리에 사용되는 황을 이용한 독립영양 탈질용 다공성 담체에 있어서, 분말황, 알칼리도 대체물질, 분쇄 암면 및 탈질미생물의 생장에 필요한 영양소를 혼합하여 포함하는 독립영양 탈질용 다공성 담체에 관한 것이다.The present invention relates to a porous carrier for autotrophic denitrification using sulfur, and more particularly to a porous carrier for autotrophic denitrification using sulfur used in water treatment, for the growth of powdered sulfur, alkalinity substitutes, ground rock wool and denitrification microorganisms. It relates to a porous carrier for autotrophic denitrification comprising a mixture of necessary nutrients.

또한 본 발명은 황이용 탈질공정에서 알칼리도 공급과 초기 미생물의 부착을 용이하게 하는 개선된 황 담체의 제조 방법에 관한 것이며, 저농도의 질산성 질소를 포함하는 지하수, 침출수 또는 하·폐수의 탈질 등을 황이용 독립영양 탈질미생물을 이용하여 생물학적으로 처리하는 수처리 공정 분야이다.The present invention also relates to a method for producing an improved sulfur carrier which facilitates the supply of alkalinity and the attachment of initial microorganisms in a sulfur denitrification process, and the denitrification of groundwater, leachate or sewage and wastewater containing low concentrations of nitrate nitrogen. It is a field of water treatment that biologically treats sulfur using autotrophic denitrification microorganisms.

황이용 독립영양 탈질의 반응식은 다음의 반응식 1과 같으며, 종속영양 탈질의 경우와 같이 외부 유기탄소원을 필요로 하지 않는다. 그러나 반응 시 발생되는 수소이온에 의해 수용액의 알칼리도가 감소하여 이에 대한 대책이 필요하다. 또한 지하수의 경우 황 탈질 미생물의 생장에 필요한 영양소 (nutrients)가 부족하여 미생물의 부착성장을 저해할 수 있다.The reaction scheme for sulfur-independent nutrient denitrification is shown in Scheme 1 below and does not require an external organic carbon source as in the case of heterotrophic denitrification. However, due to the hydrogen ions generated during the reaction, the alkalinity of the aqueous solution is reduced, so countermeasures are required. In addition, groundwater lacks the nutrients necessary for the growth of denitrifying microorganisms, which can inhibit the growth of adhesion of microorganisms.

[반응식 1]. 황을 이용한 독립영양 탈질반응[Scheme 1]. Autotrophic Denitrification Using Sulfur

55S + 20CO2 + 50NO3 - + 38H2O + 4NH4 + → 4C5H7O2N+25N2 + 55SO4 2- + 64H+ 55S + 20CO 2 + 50NO 3 - + 38H 2 O + 4NH 4 + → 4C 5 H 7 O 2 N + 25N 2 + 55SO 4 2- + 64H +

기존의 황이용 독립영양 탈질에서는 입자상의 황을 칼럼에 충진하고 이와 함께 같은 칼럼 안에 알칼리도 대체 물질로 석회석이나 패각 등의 CaCO3를 포함한 물질을 입자상으로 바꾸어 채워 넣음으로써 미생물의 무기 탄소원의 역할과 알칼리도 공급을 위한 역할을 하게 한다. 그러나 입자상의 황은 도 3a에서 보는 바와 같이 표면이 매끄럽고 소수성의 특징을 지니므로 미생물이 황 입자에 부착하여 생장하는 데 긴 적응기간이 필요하다. 또한, 상기 황 충진형 반응기를 사용하는 경우 구형의 입자상 황을 이용하게 되는데, 그 크기는 2-7 mm의 입경을 가지는 것이 대부분으로 벌크 상태의 황에서 선별 과정을 거치더라도 그 평균크기가 10 mm이하가 된다. 이것은 일반적인 상업용 황의 경우 그 크기가 작은 황을 주로 사용하기 때문이며, 독립영양 탈질을 위해 입자크기가 큰 황을 이용하려면 별도의 성형 과정을 거쳐야 하므로 기존의 황 탈질 공정에서는 대부분 그대로 입자 크기가 작은 상업용 황을 사용해 왔다.In the conventional sulfur-free autotrophic denitrification, particulate sulfur is filled into a column, and the same role as the inorganic carbon source and alkalinity of microorganisms is changed by filling the same column with a material containing CaCO 3 such as limestone or shell as an alternative to alkalinity. Play a role for supply. However, the particulate sulfur has a smooth surface and hydrophobic character as shown in FIG. 3A, and therefore requires a long adaptation period for microorganisms to adhere to and grow on the sulfur particles. In addition, when the sulfur-filled reactor is used, spherical particulate sulfur is used, and the size is 2-7 mm in size, and the average size is 10 mm even though the screening process is performed in bulk sulfur. It becomes as follows. This is because general sulfur is used mainly for small sulfur, and in order to use sulfur having large particle size for autotrophic denitrification, a separate molding process is required. Has been used.

이런 입자상 황은 그 크기가 작으므로 충진형 반응기에 적용할 경우 여상의 공극률이 매우 작으며, 그 상태에서 황 입자에 부착된 미생물에 의해 탈질 반응이 진행될 경우 미생물에 의한 생물막 (bio film) 두께의 증가와 질소 기포의 생성으로 처리하고자 하는 원수 및 탈질 처리된 지하수가 통과할 수 있는 공극은 더욱 작아지게 된다. 이에 반응이 진행됨에 따라 수리학적 수두 손실이 증가하게 되며, 국부적인 폐색현상 일어나고 미생물에 원활한 먹이의 공급이 어려워지므로 처리 효율 또한 낮아지게 된다. 또한 황의 소모로 인한 황 입자의 입경 감소 및 반응기에 충진된 석회석 및 CaCO3를 포함하는 알칼리도 대체 물질의 해리로 인해 반응기에 막힘 현상이 발생할 수 있다. 이러한 문제를 해결하기 위해 기존 공정에서는 주기적인 역세척을 하게 되는데, 이러한 역세척 방법은 무산소 조건에서 성장하는 독립영양 탈질미생물에 순간적인 호기 조건을 가함으로써 일시적이지만, 미생물의 성장을 저해하게 되며 역세척 시 많은 양의 황 및 CaCO3물질의 손실로 인한 경제적인 손실도 발생한다. Since the particulate sulfur has a small size, the porosity of the filter is very small when applied to a packed reactor, and when the denitrification reaction proceeds by the microorganisms attached to the sulfur particles, the thickness of the biofilm by the microorganism increases. And the formation of nitrogen bubbles makes pores that can pass through the raw water and the denitrified ground water to be treated smaller. As the reaction proceeds, hydraulic head loss increases, local occlusion occurs, and it becomes difficult to supply food to the microorganisms, thereby lowering treatment efficiency. In addition, clogging may occur in the reactor due to the reduction of the particle size of sulfur particles due to the consumption of sulfur and the dissociation of alkalinity substitutes including limestone and CaCO 3 filled in the reactor. In order to solve this problem, the conventional process is periodically backwashed. This backwashing method is temporary by applying instant aerobic conditions to autotrophic denitrification microorganisms growing in anoxic conditions, but inhibits the growth of microorganisms. There is also an economic loss due to the loss of large amounts of sulfur and CaCO 3 materials in the cleaning.

이에, 본 발명자들은 상기 종래기술들의 문제점들을 극복하기 위하여 예의 연구노력한 결과, 분말황, 석회석, 암면 및 탈질미생물의 생장에 필요한 영양소를 혼합하여 다공성 담체의 경우, 질산성 질소를 포함하는 지하수의 생물학적 탈질 공정에 사용할 수 있음을 확인하고, 본　발명을 완성하게 되었다.Accordingly, the present inventors have diligently studied to overcome the problems of the prior art, and as a result of mixing the nutrients necessary for the growth of powdered sulfur, limestone, rock wool and denitrification microorganisms, in the case of a porous carrier, the biological of groundwater containing nitrate nitrogen After confirming that it can be used for the denitrification process, the present invention was completed.

따라서, 본 발명의 주된 목적은 생물학적 탈질작용을 용이하게 하기 위하여 증가된 비표면적을 갖는 황을 이용한 독립영양 탈질용 다공성 담체 및 그 제조방법을 제공하는 데 있다.Accordingly, a main object of the present invention is to provide a porous carrier for autotrophic denitrification using sulfur having an increased specific surface area and a method for producing the same in order to facilitate biological denitrification.

본 발명의 한 양태에 따르면, 본 발명은 수처리에 사용되는 황을 이용한 독립영양 탈질용 다공성 담체에 있어서, 분말황, 알칼리도 대체물질, 분쇄 암면 및 탈질미생물의 생장에 필요한 영양소를 혼합하여 포함하는 독립영양 탈질용 다공성 담체를 제공한다.According to an aspect of the present invention, the present invention is an independent nutrient denitrifying porous carrier using sulfur used in water treatment, comprising a mixture of powdered sulfur, alkalinity substitutes, ground rock wool and nutrients necessary for the growth of denitrification microorganisms Provided is a porous carrier for nutrient denitrification.

본 발명의 황이용 탈질용 다공성 담체는 상기 구성성분의 조성비를 적당히 조절함으로서 질산성 질소를 포함하는 오·폐수의 처리에도 사용될 수 있으나, 저농도의 질산성 산소를 포함하는 지하수, 침출수 등의 수처리에 사용되는 것이 바람직하다. The sulfur-based denitrifying porous carrier of the present invention may be used for the treatment of wastewater containing nitrate nitrogen by appropriately adjusting the composition ratio of the components, but for the treatment of groundwater, leachate, etc. containing low concentration of nitrate oxygen. It is preferred to be used.

본 발명에 있어서, 상기 분말황은 일반적으로 판매되는 상업용 입자상의 황 또는 분말 황을 사용할 수도 있으나, 경제적인 측면을 고려하여 정유공장에서 부산물로 형성되는 원소황 (분말황)을 사용하여 본 발명의 다공성 담체를 제조하는 것이 바람직하다.In the present invention, the powdered sulfur may be generally used commercially available sulfur or powdered sulfur, but in consideration of economic aspects, the porous of the present invention using elemental sulfur (powdery sulfur) formed as a by-product in an oil refinery. It is preferred to prepare a carrier.

본 발명에서 암면의 추가로 표면적이 증가하여 미생물이 초기에 황담체 표면에 쉽게 부착 성장 할 수 있다. 암면 (rock wool)은 일반적으로 수분함유량이 높고 공극률 (porosity)이 높은 것으로 알려져 있다. 본 발명에 사용되는 암면은 담체 제조 시 경제적, 환경적인 측면을 고려하여 농업용 폐기 암면을 입수, 이를 분쇄한 것을 사용하는 것이 바람직하다. 종래의 황 또는 황과 CaCO3로 이루어진 담체는 표면이 매끄럽고 소수성의 특징을 지니고 있기 때문에 (도 3a, 3b 참조), 미생물이 황 입자에 부착하여 생장하는 데 상당히 긴 적응기간이 필요하다는 단점이 있었다. 그러나 본 발명에서와 같이 황, CaCO3 및 암면을 함께 혼합하여 제조된 다공성 담체는 비표면적이 증가된 형태 (도 3c 참조)로서 기존 담체의 초기적응성이 낮은 단점을 보완하여 미생물의 황이용 속도, 즉 탈질속도를 증가시킬 수 있다.In the present invention, the additional surface area of rock wool is increased so that microorganisms can easily grow and adhere to the yellow carrier surface initially. Rock wool is generally known to have high water content and high porosity. The rock wool used in the present invention is preferably used to obtain agricultural waste rock wool, and crushed it in consideration of economic and environmental aspects in the manufacture of the carrier. Conventional sulfur, or carriers composed of sulfur and CaCO 3 have the disadvantage that the microorganisms require a considerably long adaptation period to adhere to and grow on the sulfur particles because of their smooth surface and hydrophobic character (see FIGS. 3A and 3B). . However, the porous carrier prepared by mixing together sulfur, CaCO 3 and rock wool as in the present invention is a form of increased specific surface area (see Figure 3c) to compensate for the disadvantage of the low initial adaptability of the existing carrier microorganisms sulfur utilization rate, That is, the denitrification rate can be increased.

본 발명의 다공성 담체에서, 상기 다공성 담체는 구성성분의 질량비가 반응의 양론상 그리고 경험상 분말황:알칼리도 대체물질:암면:영양소 = 9:9:1:1이 적당하나, 지하수 또는 침출수 중에 존재하는 알칼리도 및 질산성 질소의 농도에 따라 탄력적으로 대응하기 위하여 바람직하게는 분말황:알칼리도 대체물질:암면:영양소 = 8:8:1:1 내지 10:10:1:1인 것을 특징으로 한다.In the porous carrier of the present invention, the porous carrier has a mass ratio of components in terms of the stoichiometric and empirical reactions of powder sulfur: alkalinity substitute: rock wool: nutrient = 9: 9: 1: 1, but is present in groundwater or leachate. In order to respond elastically according to the alkalinity and the concentration of nitrate nitrogen, powder sulfur: alkalinity substitute material: rock wool: nutrient = 8: 8: 1: 1 to 10: 10: 1: 1.

본 발명의 다공성 담체에서, 바람직하게는 상기 알칼리도 대체물질은 석회석 (CaCO3) 또는 패각인 것을 특징으로 한다. 본 발명에서 알칼리도 대체물질이란 황이용 탈질반응 시 감소되는 알칼리도를 조절하기 위해 첨가되는 것으로, 저렴하게 입수될 수 있는 석회석 (CaCO3), 패각 (조개껍질, 굴껍질 등) 등을 사용할 수 있다. 이러한 알칼리도 물질은 황 담체에 부착되어 탈질작용을 일으키는 미생물에 무기탄소원 및 pH 완충용으로 사용된다.In the porous carrier of the present invention, preferably, the alkalinity substitute is limestone (CaCO 3 ) or shell. In the present invention, the alkalinity substitute material is added to control the alkalinity which is reduced during the sulfur-using denitrification, and limestone (CaCO 3 ), shells (shell shells, oyster shells, etc.), which can be obtained at low cost, may be used. Such alkalinity substances are used for the inorganic carbon source and pH buffer in microorganisms attached to the sulfur carrier to cause denitrification.

본 발명의 다공성 담체에서, 상기 영양소는 KH2PO4, NaHCO3, MgCl2 및 FeSO4를 포함하는 것을 특징으로 한다. 또한, 상기 영양소의 조성비는 황탈질 미생물의 성장을 위하여 KH2PO4:NaHCO3: MgCl2:FeSO4 = 10:4:2:1 내지 12:6:4:1인 것이 적당하나, 바람직하게는 KH2PO4:NaHCO3: MgCl2:FeSO4 = 11:5:3:1인 것이 좋다.In the porous carrier of the present invention, the nutrient is characterized in that it comprises KH 2 PO 4 , NaHCO 3 , MgCl 2 and FeSO 4 . In addition, the composition ratio of the nutrient is suitable for the growth of denitrifying microorganisms KH 2 PO 4 : NaHCO 3 : MgCl 2 : FeSO 4 = 10: 4: 2: 1 to 12: 6: 4: 1, preferably Is KH 2 PO 4 : NaHCO 3 : MgCl 2 : FeSO 4 = 11: 5: 3: 1.

본 발명의 다른 양태에 따르면, 본 발명은 하기 단계를 포함하는 황을 이용한 독립영양 탈질용 다공성 담체의 제조방법을 제공한다 (도 1).According to another aspect of the present invention, the present invention provides a method for preparing a porous carrier for autotrophic denitrification using sulfur, which comprises the following steps (FIG. 1).

a) 분말황에 석회석, 패각 등의 알칼리도 대체물질을 첨가한 후, 잘게 분쇄한 암면 및 탈질미생물의 생장에 필요한 영양소를 첨가하여 혼합하는 단계,a) adding alkalinity substitutes such as limestone and shells to powdered sulfur, and then adding and mixing nutrients necessary for the growth of finely ground rock wool and denitrifying microorganisms,

b) 상기 a)단계의 혼합물을 130-150℃로 가열하고 혼합하여 균일한 슬러리를 형성하는 단계, 및b) heating and mixing the mixture of step a) to 130-150 ° C. to form a uniform slurry, and

c) 상기 b)단계의 슬러리를 냉각수에서 서서히 냉각시켜 2-5 mm의 구형의 담체를 형성시키는 단계.c) slowly cooling the slurry of step b) in cooling water to form a spherical carrier of 2-5 mm.

이하, 실시예를 통하여 본 발명을 더욱 상세히 설명하기로 한다. 이들 실시예는 단지 본 발명을 예시하기 위한 것이므로, 본 발명의 범위가 이들 실시예에 의해 제한되는 것으로 해석되지는 않는다.Hereinafter, the present invention will be described in more detail with reference to Examples. Since these examples are only for illustrating the present invention, the scope of the present invention is not to be construed as being limited by these examples.

실시예 1. 분말황, 석회석, 암면 및 영양소가 혼합된 다공성 황 담체의 제조Example 1 Preparation of Porous Sulfur Carrier Mixed with Powdered Sulfur, Limestone, Rockwool and Nutrients

우선 황 분말에 석회석, 패각 등 알칼리도 대체 물질을 첨가한 후 잘게 분쇄한 암면, 그리고 미생물 생장에 필요한 영양소 (nutients, 표 1참조)를 넣고 고르게 섞이도록 혼합한다. 여기서, 상기 구성성분들은 분말황:석회석:영양소:암면 = 9:9:1:1 (질량비)이 되도록 첨가한다. 이 후 130℃-150℃로 상기 혼합 분말을 가열하여 용융된 황에 다른 구성 물질들이 혼합되어 균일한 슬러리를 형성하도록 한다. 이 슬러리를 냉각수에서 서서히 냉각시키고 2-5 mm의 구형의 담체를 제조한다 (도 2).To the sulfur powder, add alkalinity substitutes such as limestone and shells, then mix finely ground rock wool and the nutrients (nutients, see Table 1) necessary for microbial growth and mix them evenly. Wherein the components are added such that powder sulfur: limestone: nutrients: rock wool = 9: 9: 1: 1 (mass ratio). Thereafter, the mixed powder is heated to 130 ° C.-150 ° C. such that other constituent materials are mixed with molten sulfur to form a uniform slurry. This slurry is slowly cooled in cooling water and a spherical carrier of 2-5 mm is prepared (FIG. 2).

[표 1]. 본 발명의 다공성 담체에 사용된 영양소의 조성TABLE 1 Composition of Nutrients Used in the Porous Carrier of the Present Invention

Figure 112007042075009-pat00001
Figure 112007042075009-pat00001

실시예 2. SEM을 이용한 다공성 황 담제 표면 관찰Example 2 Observation of Porous Sulfur Surface by SEM

기존에 알려져 있는 황으로만 이루어진 담체 및 황과 CaCO3만으로 이루어진 담체의 표면을 본 발명에 따른 개선된 다공성 담체의 표면과 비교하기 위하여 주사전자현미경 (SEM)을 이용하여 비교관찰 하였다 (도 3의 a,b,c). 도 3의 a 및 b와 비교할 때, 도 3c는 표면이 더 거질어 비표면적이 넓음을 알 수 있다.In order to compare the surface of a known carrier consisting solely of sulfur and a carrier consisting solely of sulfur and CaCO 3 with the surface of an improved porous carrier according to the present invention, a scanning electron microscope (SEM) was used for comparison (FIG. 3). a, b, c). Compared with a and b of FIG. 3, FIG. 3C shows that the surface is more rough and the specific surface area is wide.

이상 설명한 바와 같이, 본 발명에 따르면 암면을 이용하여 담체의 비표면적을 증가시켜 황 탈질 미생물의 생장 초기에 담체 표면에 부착 성장하는 시간을 단축시키고, 안정적인 알칼리도의 공급과 미생물의 무기 탄소원의 공급 및 지하수에 부족한 영양소의 안정적인 공급이 효과적으로 이루어지게 되므로 본 발명의 다공성 담체를 이용하여 질산성 질소가 포함된 지하수의 수처리 공정에 유용하게 이용될 수 있다.As described above, according to the present invention, the specific surface area of the carrier is increased by using rock wool to shorten the time of attachment and growth on the surface of the carrier in the early stage of growth of the denitrifying microorganisms, supplying stable alkalinity and supplying inorganic carbon source of the microorganism and Since stable supply of nutrients deficient in groundwater is effectively achieved, the porous carrier of the present invention may be usefully used in the water treatment process of groundwater containing nitrate nitrogen.

Claims (6)

수처리에 사용되는 황을 이용한 독립영양 탈질용 다공성 담체에 있어서, 분말황, 알칼리도 대체물질, 분쇄 암면 및 탈질미생물의 생장에 필요한 영양소을 혼합하여 포함하고, 상기 알칼리도 대체물질은 석회석 (CaCO3) 또는 패각이고, 상기 영양소은 KH2PO4, NaHCO3, MgCl2 및 FeSO4를 포함하는 것을 특징으로 하는 독립영양 탈질용 다공성 담체.In the porous carrier for autotrophic denitrification using sulfur used in water treatment, powdered sulfur, alkalinity substitutes, ground rock wool and nutrients necessary for the growth of denitrified microorganisms are mixed, and the alkalinity substitutes are limestone (CaCO 3 ) or shells. The nutrient is KH 2 PO 4 , NaHCO 3 , MgCl 2 And FeSO 4 characterized in that it comprises a porous carrier for autotrophic denitrification. 제 1항에 있어서, 상기 다공성 담체는 구성성분의 질량비가 분말황:알칼리도 대체물질:암면:영양소 = 8:8:1:1 내지 10:10:1:1인 것을 특징으로 하는 다공성 담체.The porous carrier of claim 1, wherein the mass ratio of the components of the porous carrier is powder sulfur: alkalinity substitute: rock wool: nutrient = 8: 8: 1: 1 to 10: 10: 1: 1. 삭제delete 삭제delete 제 1항에 있어서, 상기 영양소은 구성성분의 질량비가 KH2PO4:NaHCO3: MgCl2:FeSO4 = 10:4:2:1 내지 12:6:4:1인 것을 특징으로 하는 다공성 담체.The method of claim 1, wherein the nutrient is a porous carrier, characterized in that the mass ratio of the components KH 2 PO 4 : NaHCO 3 : MgCl 2 : FeSO 4 = 10: 4: 2: 1 to 12: 6: 4: 1. 하기 단계를 포함하는 황을 이용한 독립영양 탈질용 다공성 담체의 제조방법:Method for producing a porous carrier for autotrophic denitrification using sulfur comprising the following steps: a) 분말황에 석회석, 패각 등의 알칼리도 대체물질을 첨가한 후, 잘게 분쇄한 암면 및 탈질미생물의 생장에 필요한 영양소를 첨가하여 혼합하는 단계,a) adding alkalinity substitutes such as limestone and shells to powdered sulfur, and then adding and mixing nutrients necessary for the growth of finely ground rock wool and denitrifying microorganisms, b) 상기 a)단계의 혼합물을 130-150℃로 가열하고 혼합하여 균일한 슬러리를 형성하는 단계, 및b) heating and mixing the mixture of step a) to 130-150 ° C. to form a uniform slurry, and c) 상기 b)단계의 슬러리를 냉각수에서 서서히 냉각시켜 2-5mm의 구형의 담체를 형성시키는 단계.c) slowly cooling the slurry of step b) in cooling water to form a spherical carrier of 2-5 mm.
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