KR20010039479A - Ceramic media for biofilteration and its manufacture method - Google Patents

Ceramic media for biofilteration and its manufacture method Download PDF

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KR20010039479A
KR20010039479A KR1019990049032A KR19990049032A KR20010039479A KR 20010039479 A KR20010039479 A KR 20010039479A KR 1019990049032 A KR1019990049032 A KR 1019990049032A KR 19990049032 A KR19990049032 A KR 19990049032A KR 20010039479 A KR20010039479 A KR 20010039479A
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water
less
weight
water content
raw material
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KR1019990049032A
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Korean (ko)
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박영식
우창원
조문철
민은주
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김재규
서봉리사이클링 주식회사
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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
    • C02F11/00—Treatment of sludge; Devices therefor
    • 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
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Inorganic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

PURPOSE: Disclosed is a ceramic media for microbial filtration using waste casting sand, fly ash, ocher, dehydrated sludge, and oyster shell as raw materials, which is capable of displacing expensive granular activated carbon that has been imported wholly from abroad. CONSTITUTION: The ceramic media is prepared by mixing/kneading 20-30wt.% of waste casting sand having 5-10% of moisture content and being less than 200 mesh size, 20-30wt.% of fly ash having 5-10% of moisture content and being than 200 mesh size, 20-30wt.% of ocher having 9-15% of moisture content and being less than 200 mesh size, 20-30wt.% of dehydrated sludge having 80-90% of moisture content, and 3-10wt.% of oyster shell having less than 5% of moisture content and being less than 200 mesh size; extruding prepared dough in order to make a pellet having 3-7mm in diameter and in length respectively; drying the pellet at ambient temperature for 24 hours; calcining the dried pellet at a temperature range of 1050 to 1200deg.C for 1 to 2 hours; and then cooling it.

Description

생물여과용 세라믹 담체 및 그 제조방법{Ceramic media for biofilteration and its manufacture method}Ceramic media for biofiltration and its manufacturing method {Ceramic media for biofilteration and its manufacture method}

본 발명은 수처리공정에 사용되는 생물여과용 세라믹 담체 및 그 제조방법에 관한 것으로, 더욱 상세하게는 폐주물사 미분, fly ash 미분, 황토 미분, 정수처리장이나 하수처리장의 탈수슬러지 및 굴패각으로 제조되어 값이 저렴하면서 높은 기공과 표면적에 의한 흡착작용, 여과작용 및 표면에 형성된 생물막에 의해 유기물을 제거하면서 압축강도가 높아서 수명이 긴 생물여과 세라믹 담체의 제조와, 혼합과 반죽 및 압출성형과 절단이 동시에 이루어지기 때문에 제조 공정이 간단한 세라믹 담체의 제조방법에 관한 것이다.The present invention relates to a biofiltration ceramic carrier used in a water treatment process and a method for manufacturing the same, and more particularly, it is made of waste foundry sand, fly ash, ocher, and dehydration sludge and oyster shell in a water treatment plant or sewage treatment plant. Inexpensive, high porosity and surface area adsorption, filtration, and biofilms formed on the surface remove organic matter and have high compressive strength to produce long-life biofiltration ceramic carriers, mixing, kneading, extrusion molding and cutting simultaneously The present invention relates to a method for producing a ceramic carrier having a simple manufacturing process.

산업발달로 인해 상수원수에 대한 여러 형태의 오염은 계속 되어가고 있는데 반해, 기존의 정수처리공정으로는 오염된 상수원수의 제거대상물질들을 효과적으로 제거하기에는 많은 문제점을 가지고 있다. 현재 국내에서 사용하고 있는 정수처리방법중 중요한 공정으로는 전염소처리를 거쳐 물리·화학적 처리 및 모래여과를 중심으로 하는 응집과 침전 및 여과과정으로 이루어져 있다. 이러한 처리공정으로는 입자상 물질들을 제거하기 위해 사용하는 응집제의 floc 형성 관계에서 일부 용존성 유기물질들의 제거가 이루어지고 있는데, 여기서 제거되지 않은 용존성 유기물질은 살균부산물의 생성 및 배수관망에서의 미생물 오염과 같은 문제점들을 야기할 수 있다.Due to industrial development, various forms of contamination of drinking water continue, whereas conventional water treatment processes have many problems in effectively removing the substances to be removed from contaminated water. An important process currently used in domestic water treatment process is prechlorination, physical and chemical treatments, and coagulation, precipitation and filtration processes centered on sand filtration. In this process, some dissolved organic substances are removed from floc formation of flocculant used to remove particulate matter. It can cause problems such as contamination.

생물여과공정은 상기의 기존정수처리에 의하여 효과적으로 제거할 수 없는 용해성 유기물, 미량 유기화합물, 암모니아성 질소, 철 및 망간 등의 처리에 적합하며 정수처리후 송·배수과정에서 미생물의 재번식에 이용되는 미량 용존 유기물과 이·취미, 그리고 살균소독에 의해 부산물을 형성할 수 있는 전구물질들을 산화시킨다. 최근 북미에서는 BAC(Biological Activated Carbon : 생물 활성탄)등을 이용한 여과공정에 대한 활발히 연구가 진행되고 있고 국내에서도 일부 정수처리장에 설치되어 있다.The biofiltration process is suitable for the treatment of soluble organics, trace organic compounds, ammonia nitrogen, iron and manganese, which cannot be effectively removed by the existing water treatment. It oxidizes traces of dissolved organics and other precursors that can form by-products by disinfection, taste and disinfection. Recently, research on filtration process using Biological Activated Carbon (BAC) has been actively conducted in North America, and it is installed in some water treatment plants in Korea.

여과에 사용되는 담체는 입상활성탄, 안트라사이트 및 모래 등이며 그 중에서 BAC를 이용한 생물여과공정에 사용되는 입자상 활성탄은 높은 비표면적으로 인해 미생물이 잘 고정되고, 기공이 많아 흡착능이 뛰어나다. 그러나 입상활성탄 원료의 대부분을 수입에 의존하고 있고 톤당 가격이 700,000원 ∼ 1,000,000원이므로 엄청난 비용이 소모되며, 년간 5% 이상이 마모되고, 파쇄된 입자들이 부유고형물이 되어 유출수에 섞여 유출되므로 유출수를 혼탁 시킨다. 더욱이 담체에는 과도성장한 잉여 미생물이 생기므로 역 세척의 빈도가 잦아지나, 기계적인 잉여 미생물 제거는 활성탄의 파손 때문에 어렵고, 활성탄의 재생 역시 비용이 많이 들고 재생시 활성탄의 활성이 떨어지는 단점이 있다.Carriers used for filtration are granular activated carbon, anthracite and sand. Among them, granular activated carbon used in a biofiltration process using BAC has a high specific surface area and microorganisms are well fixed, and pores are excellent in adsorption capacity. However, most of the granular activated carbon raw material is imported, and the price per ton is 700,000 ~ 1,000,000 won, which is a huge cost, and more than 5% is worn out per year, and the crushed particles become suspended solids, mixed with the effluent and runoff. Turbid. In addition, since the excess microorganisms are excessively grown in the carrier, the frequency of backwashing is frequently increased, but the removal of mechanical excess microorganisms is difficult due to the destruction of activated carbon, and the regeneration of activated carbon is also expensive and the activity of activated carbon is lowered during regeneration.

모래는 구하기가 쉽고 가격이 저렴하며 내구성이 강하지만 미생물이 부착되는 시간이 많이 요구되고, 부착된 미생물이 탈리되기 쉽다. 그러므로 활성탄의 다공성과 모래와 같은 충분한 내구성을 가지는 생물여과용 담체의 개발이 요구된다.Sand is easy to obtain, inexpensive, and durable, but requires a lot of time for the microorganisms to attach, and the attached microorganisms are likely to detach. Therefore, there is a need for development of a biofiltration carrier having sufficient porosity and activated durability such as sand.

또한 기존의 세라믹 담체의 제조 공정은 ‘분쇄→혼합→물첨가→반죽→압출성형→절단→건조→소성→냉각→제품’의 단계로서 매우 복잡하므로 제조 원가 상승의 원인이 된다.In addition, the existing manufacturing process of the ceramic carrier is a complex step of pulverizing, mixing, adding water, kneading, extrusion molding, cutting, drying, firing, cooling, and product, and thus, increases the manufacturing cost.

본 발명은 상기와 같은 문제점을 해소하기 위하여 주성분으로 폐주물사 미분, fly ash 미분 및 황토 미분, 바인더와 물 첨가용으로 탈수슬러지를 첨가하고 발포제로 굴패각을 혼합 후 소성 제조하여 높은 기공과 표면적이 의한 흡착작용, 여과작용 및 표면에 형성된 생물막에 의해 유기물 제거율에 높은 활성탄의 장점과 제조비용이 적게 들며 압축강도가 높아 수명이 긴 모래의 장점을 가지는 수처리용 생물여과 세라믹 담체 및 혼합과 반죽, 압출 성형과 절단을 한 공정으로 단축시켜 제조공정을 줄이는데 목적이 있는 것이다.In order to solve the above problems, the present invention adds dehydrated sludge for fly molding sand, fly ash and ocher powder, and binder and water as main components, and mixes oyster shells with a blowing agent and calcined to make plastic adsorption by high porosity and surface area. Biofiltration ceramic carriers for water treatment, which have advantages of high activated carbon removal rate, low manufacturing cost, high compressive strength, and long lifespan due to the action, filtration and biofilm formed on the surface. The purpose is to reduce the manufacturing process by shortening the cutting to one process.

이러한 목적을 달성하기 위한 본 발명은, 주원료로 미분의 폐주물사 20 내지 30중량%, fly ash 20 내지 30중량% 및 황토 20 내지 30중량%에 바인더와 물 첨가용으로 함수율이 80 ∼ 90%인 탈수슬러지 20 내지 30중량%와 발포제로 굴패각 3 내지 10중량%를 혼합·반죽하는 단계, 반죽된 원료를 압출기를 사용하여 지름 3 ∼ 7mm, 길이 3 ∼ 7mm인 pellet으로 압출 성형·절단하는 단계, 절단된 pellet을 24시간 상온에서 건조시키는 단계, 건조된 pellet을 1050 ∼ 1200℃에서 1∼2시간 동안 소성하는 단계, 소성된 pellet을 상온에서 냉각시키는 단계로 이루어진 것에 특징이 있다.In order to achieve the above object, the present invention provides 20 to 30% by weight of finely divided waste foundry sand, 20 to 30% by weight of fly ash, and 20 to 30% by weight of ocher for dehydration of water content of 80 to 90% for binder and water addition. Mixing and kneading 20 to 30% by weight of sludge and 3 to 10% by weight of oyster shell with a blowing agent; extruding and cutting the kneaded raw material into pellets having a diameter of 3 to 7 mm and a length of 3 to 7 mm using an extruder, and cutting Drying the pellets at room temperature for 24 hours, firing the dried pellets for 1 to 2 hours at 1050 ~ 1200 ℃, characterized in that consisting of the step of cooling the calcined pellets at room temperature.

도 1은 본 발명에 따른 생물여과용 세라믹 담체의 제조 공정도.1 is a manufacturing process diagram of a biofiltration ceramic carrier according to the present invention.

도 2은 생물여과용 세라믹 담체의 표면을 조사한 전자현미경 사진2 is an electron micrograph of the surface of the ceramic filter for biofiltration

도 3는 생물여과용 세라믹 담체의 단면을 조사한 전자현미경 사진Figure 3 is an electron microscope photograph of the cross section of the ceramic filter for biofiltration

이하 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings as follows.

도 1은 생물여과용 세라믹 담체 및 그 제조방법에 관한 공정도로서, 주원료로 입도가 200㎛이하이고 함수율이 5 ∼ 10%인 미분 폐주물사 20 내지 30중량%, 입도가 200㎛이하이고 함수율이 5 ∼ 10%인 fly ash 20 내지 30중량% 및 입도가 200㎛이하이고 함수율이 9 ∼ 15%인 황토 20 내지 30중량%에 바인더와 물 첨가용으로 함수율이 80 ∼ 90%인 탈수슬러지 20 내지 30중량%와 발포제로 입도가 200㎛이하이고 함수율이 5%이하인 굴패각 3 내지 10중량%를 혼합하여 수분이 20 ∼ 25%되도록 혼합 및 반죽을 동시에 수행하는 (1) 단계, 수분이 20 ∼ 25%에서 반죽된 원료를 압출기를 사용하여 지름이 3 ∼ 7mm인 pellet으로 성형하고 자체 중량으로 인해 3∼ 7mm 길이로 자동적으로 절단되는 (2) 단계, 절단된 pellet을 24시간 상온에서 건조시키는 (3) 단계, 건조된 pellet을 1050 ∼ 1200℃에서 1∼2시간 동안 소성하는 (4) 단계, 소성된 pellet을 상온에서 냉각시키는 (5) 단계를 거치면 (6) 단계의 세라믹 담체가 되는 것이다.1 is a process chart related to a ceramic support for biofiltration and a method of manufacturing the same, 20 to 30% by weight of finely divided waste foundry sand having a particle size of 200 μm or less and a water content of 5 to 10%, a particle size of 200 μm or less, and a water content of 5 to 10 μm. 20 to 30% by weight of 10% fly ash and 20 to 30% by weight of ocher with a particle size of 200 μm and a water content of 9 to 15%, and 20 to 30 weight of dewatered sludge with water content of 80 to 90% for binder and water addition (1) step of simultaneously mixing and kneading so that the water content is 20 to 25% by mixing 3 to 10% by weight of oyster shells having a particle size of 200 μm or less and a water content of 5% or less with a foaming agent and a moisture content of 20 to 25% (2) the dough is molded into pellets having a diameter of 3 to 7 mm using an extruder and automatically cut into lengths of 3 to 7 mm due to its own weight, and the cut pellets are dried at room temperature for 24 hours (3). 1 ~ 2 hours of dried pellet at 1050-1200 ℃ 4 is that step, (6) a ceramic substrate in step geochimyeon (5) cooling the fired pellet at room temperature for sintering over.

여기서 (1) 단계에서는 함수율이 80 ∼ 90%인 탈수슬러지를 이용하여 혼합·반죽하기 때문에 반죽시 함수율이 20 ∼ 25%로 되므로 별도의 물을 첨가하지 않고 반죽이 되어 원료를 건조하고 다시 반죽을 위해 물을 첨가하지 않아도 되며 혼합과 반죽이 동시에 이루어져 공정이 간단하게 된다. 또한 (3) 단계에서 혼합반죽물의 수분이 20 ∼ 25%일때 압출 성형되어 나오는 3 ∼ 7mm인 성형품은 자체의 중량에 의해 3 ∼ 7mm의 길이로 자동절단된다. 상기 과정에 의해 성형·절단된 담체는 (5) 단계를 거치면 굴패각에 의해 미세기공이 생기고, 압축강도가 200kgf/㎠ ∼ 3000kgf/㎠가 되어 장기간 사용 가능한 담체로 제조된다Here, in step (1), mixing and kneading using a dehydration sludge having a water content of 80 to 90%, the water content becomes 20 to 25% when kneading, so that the dough is dried without adding water, and the raw material is dried and kneaded again. There is no need to add water, and mixing and kneading are done at the same time, simplifying the process. In addition, in the step (3), when the moisture content of the mixed dough is 20 to 25%, the molded product of 3 to 7 mm that is extruded is automatically cut into a length of 3 to 7 mm by its own weight. Carrier molded and cut by the above process is produced as a carrier that can be used for a long time as the micropores are generated by the oyster shell and the compressive strength is 200kg f / ㎠ ~ 3000kg f / ㎠

이상에서 상술한 바와 같이 본 발명은 주원료가 폐주물사, fly ash, 및 황토이므로 제조비용이 적게 소요된다. 또한 굴패각에 의해 생긴 기공은 활성탄의 기공역할을 하게되어 유기물질 및 수중에 존재하는 미량물질을 흡착할 수 있게 된다. 1050 ∼ 1200℃에서 1∼2시간 동안 소성하게 되므로 압축강도가 높아 장기간 사용할 수 있어 교체비용이 적게 들기 때문에 활성탄과 모래의 장점을 동시에 가지면서 단점을 보완하는 담체가 되는 것이다.As described above, in the present invention, since the main raw materials are waste casting sand, fly ash, and loess, the manufacturing cost is low. In addition, the pores generated by the oyster shell act as pores of the activated carbon, so that the organic substances and the trace substances present in the water can be adsorbed. Since it is calcined for 1 to 2 hours at 1050 ~ 1200 ℃ it can be used for a long time because of high compressive strength is less replacement cost because it has the advantages of activated carbon and sand at the same time to complement the disadvantages.

반죽용 물을 첨가하지 않고 함수율이 80 ∼ 90%인 정수처리장이나 하수처리장의 탈수슬러지를 사용하여 혼합·반죽하기 때문에 혼합 및 반죽이 동시에 이루어지고, 수분이 20 ∼ 25%이면 압출성형되어 나오는 성형품은 자체의 중량에 의해 3 ∼ 7mm의 길이로 자동절단되어 4단계의 공정이 2단계로 감소되어 공정이 간단하게 된다.Since the mixture is mixed and kneaded using dehydration sludge in a water treatment plant or sewage treatment plant with a water content of 80 to 90% without adding water for the dough, mixing and kneading are carried out simultaneously. Silver is automatically cut into lengths of 3 to 7 mm by the weight of itself and the process of four steps is reduced to two steps to simplify the process.

Claims (5)

주원료로 입도가 200㎛이하이고 함수율이 5 ∼ 10%인 미분 폐주물사 20 내지 30중량%, 입도가 200㎛이하이고 함수율이 5 ∼ 10%인 fly ash 20 내지 30중량% 및 입도가 200㎛이하이고 함수율이 9 ∼ 15%인 황토 20 내지 30중량%에 바인더와 물 첨가용으로 함수율이 80 ∼ 90%인 정수처리장이나 하수처리장의 탈수슬러지 20 내지 30중량%와 발포제로 입도가 200㎛이하이고 함수율이 5%이하인 굴패각 3 내지 10중량%를 균일하게 혼합·반죽하고, 소성시켜서 이루어짐을 특징으로 하는 생물여과용 세라믹 담체.The main raw materials are 20 to 30% by weight of finely divided waste sand with a particle size of 200 μm or less and a water content of 5 to 10%, 20 to 30% by weight of fly ash having a particle size of 200 μm and a water content of 5 to 10%, and a particle size of 200 μm or less. 20 to 30% by weight of yellow soil having a water content of 9 to 15%, 20 to 30% by weight of dewatered sludge in a water treatment or sewage treatment plant having a water content of 80 to 90% for the addition of binder and water, and a particle size of 200 μm or less. A biofiltration ceramic carrier, wherein the oyster shell 3 to 10% by weight of 5% or less is uniformly mixed and kneaded and calcined. 제 1항에 있어서,The method of claim 1, 1 단계의 혼합·반죽된 원료를 압출기를 사용하여 지름 3 ∼ 7mm, 길이 3 ∼ 7mm인 pellet으로 압출 성형 및 절단하는 2 단계, 절단된 pellet을 24시간 상온에서 건조시키는 3 단계, 건조된 pellet을 1050 ∼ 1200℃에서 1∼2시간 동안 소성하는 4 단계, 소성된 pellet을 상온에서 냉각시키는 5 단계를 거치는 생물여과용 세라믹 담체 제조방법.1 step mixing and kneading the raw material of the raw material using extrusion extruder 3 to 7mm in diameter, 3 to 7mm pellets in two stages of extrusion and cutting, three stages drying the pellets at room temperature for 24 hours, dried pellets Four steps of baking for 1 to 2 hours at 1050 ~ 1200 ℃, a method for producing a ceramic filter for biofiltration through a five step of cooling the fired pellet at room temperature. 제 1항에 있어서,The method of claim 1, 바인더와 물 첨가용으로 함수율이 80 ∼ 90%인 정수처리장이나 하수처리장의 탈수슬러지를 첨가하여 건조된 원료를 혼합하고 물을 첨가하여 반죽하는 단계를 없앤 생물여과용 세라믹 담체의 원료 반죽법.A raw material kneading method of a raw material for biofiltration ceramic carriers, wherein the dehydrated sludge of a water treatment plant or sewage treatment plant having a water content of 80 to 90% is added for the addition of a binder and water, and the dried raw materials are mixed and water is kneaded. 제 1항에 있어서,The method of claim 1, 바인더와 물 첨가용으로 함수율이 80 ∼ 90%인 탈수슬러지를 이용하는 방법.A method of using dewatered sludge having a water content of 80 to 90% for binder and water addition. 제 1항에 있어서,The method of claim 1, 폐주물사, fly ash, 황토, 정수처리장이나 하수처리장의 탈수슬러지 및 굴패각 등을 혼합한 원료 혼합물 함수율이 20 ∼ 25%되도록 하여 압출 성형하였을 때 제조되는 성형품이 자체 중량으로 인해 자동 절단되도록 한 원료 혼합법.Raw material blending method that mixes waste molding sand, fly ash, loess, dewatering sludge from water treatment plant or sewage treatment plant, and oyster shell with 20 ~ 25% moisture content. .
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100413338B1 (en) * 2001-02-15 2003-12-31 에코그린텍 (주) Water processing system and processing material of high adsorption
KR100468198B1 (en) * 2001-12-19 2005-01-26 (주)토원테크 Construction material composition using foundry waste sand and method of producing construction material using the composition
KR101106780B1 (en) * 2010-03-12 2012-01-18 지유 주식회사 Ceramic carrier and preparation method thereof
KR101240587B1 (en) * 2010-10-01 2013-03-11 이문기 Fitter Media For Water Treatment And Process Of The Same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100413338B1 (en) * 2001-02-15 2003-12-31 에코그린텍 (주) Water processing system and processing material of high adsorption
KR100468198B1 (en) * 2001-12-19 2005-01-26 (주)토원테크 Construction material composition using foundry waste sand and method of producing construction material using the composition
KR101106780B1 (en) * 2010-03-12 2012-01-18 지유 주식회사 Ceramic carrier and preparation method thereof
KR101240587B1 (en) * 2010-10-01 2013-03-11 이문기 Fitter Media For Water Treatment And Process Of The Same

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