KR19990078529A - Method for sewage and waste weater biological filter beds - Google Patents
Method for sewage and waste weater biological filter beds Download PDFInfo
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- KR19990078529A KR19990078529A KR1019990003610A KR19990003610A KR19990078529A KR 19990078529 A KR19990078529 A KR 19990078529A KR 1019990003610 A KR1019990003610 A KR 1019990003610A KR 19990003610 A KR19990003610 A KR 19990003610A KR 19990078529 A KR19990078529 A KR 19990078529A
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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
- C02F3/102—Permeable membranes
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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
- C02F3/06—Aerobic processes using submerged filters
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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
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/121—Multistep treatment
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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
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
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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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
Abstract
본 발명은 생물막여과 오폐수 처리방법에 관한 것으로, 오폐수가 유량조정조(10)에 유입되면서 계량조(16), 침전조(18), 집수조(22), 생물막여과조(24), 처리수조(26), 소독방류조(28)로 차례로 거쳐 처리되는 오폐수처리공정과, 상기 계량조(16)의 일부 오폐수를 유량조정조(10)로 되돌리는 오폐수재순환공정, 상기 침전조(18)의 슬러지를 오니농축저류조(20)에 저장하면서 상등수를 유량조정조(10)로 되돌리는 슬러지처리공정, 상기 처리수조(26)의 일부 처리수가 생물막여과조(24)의 생물막을 역세하고 사용된 역세수를 유량조정조(10)로 되돌리는 처리수역세정공정 및, 상기 생물막여과조(24)에서 유출되는 처리수를 집수조(22)로 되돌리는 처리수순환공정을 포함하여 이루어져, 생물막여과조(24) 앞쪽에 계량조(16)와 침전조(18)를 설치하여 1차적으로 협잡물질과 부유물질을 제거함으로써 유입수의 부유물질에 따른 수질저하를 방지할 수 있으며, 생물막여과조(24)에서 유출되는 처리수를 집수조(22)로 재순환시킴으로 유입수질을 균등화시킬 수 있도록 한 것이다.The present invention relates to a biofilm filtration wastewater treatment method, while the wastewater flows into the flow adjustment tank 10, the metering tank 16, the settling tank 18, the collection tank 22, the biofilm filtration tank 24, the treatment tank 26, The wastewater treatment process sequentially processed through the disinfection discharge tank 28, the wastewater recirculation process of returning some wastewater of the metering tank 16 to the flow rate adjusting tank 10, and sludge of the sedimentation tank 18, the sludge storage tank ( Sludge treatment step of returning the supernatant water to the flow regulating tank 10 while storing in 20), part of the treated water of the treated water tank 26 backwashes the biofilm of the biofilm filtration tank 24, and the used backwash water is used as the flow regulating tank 10. The treatment water washing process to return and the process water circulation process which returns the process water which flows out from the said biofilm filtration tank 24 to the collection tank 22, Weighing tank 16 and a settling tank in front of the biofilm filtration tank 24 are included. (18) is installed to primarily collect contaminants and By removing the material is one which can prevent quality degradation of the suspended solids of the influent, sikimeuro recycling the treated water flowing out of the biofilm filtration tank 24 to the water tank 22 so as to equalize the flowing water.
Description
본 발명은 생물막여과 오폐수 처리방법에 관한 것으로, 특히 비교적 간격이 큰 고정스크린에 의해 고형물을 제거한 후 유량조정조에 모여진 오폐수의 협잡물질과 부유물질을 침전조에서 일차적으로 제거시킨 후 다시 집수하여 생물막여과조를 거치게 하는 생물막여과 오폐수 처리방법에 관한 것이다.The present invention relates to a biofilm filtration wastewater treatment method, and in particular, by removing the solids by a relatively large fixed screen, after collecting the sediment and suspended solids of the wastewater collected in the flow adjustment tank in the sedimentation tank and collected again to collect the biofilm filtration tank The present invention relates to a biofilm filtration wastewater treatment method.
일반적으로, 오폐수의 처리는 물리적 처리법, 화학적 처리법 및, 생물학적 처리법으로 크게 구분된다. 여기서, 물리적 처리방법은 스크린, 침전, 부상, 여과, 흡착 등의 단위조작을 통하여 오염물을 제거하는 방법이고, 화학적 처리방법은 화학적 산화/환원, 화학침전, 살균, 응집, 소각 등의 단위 화학반응을 통하여 오염물을 제거하는 방법이다.In general, the treatment of waste water is largely divided into physical treatment, chemical treatment, and biological treatment. Here, the physical treatment method is a method of removing contaminants through unit operations such as screen, precipitation, flotation, filtration, and adsorption, and the chemical treatment method is a unit chemical reaction such as chemical oxidation / reduction, chemical precipitation, sterilization, flocculation, incineration, etc. It is a method of removing contaminants through.
그리고, 생물학적 처리방법은 생물에 의해서 분해 가능한 유기물을 미생물, 식물 등을 이용하여 제거하는 방법으로서, 상기 유기물인 유기성 오염물질의 농도는 흔히 생물화학적 산소요구량(Biochemical Oxygen Demand ; BOD)으로 나타낸다.In addition, the biological treatment method is a method for removing organic matter decomposable by living organisms using microorganisms, plants, and the like, and the concentration of organic pollutants, which are organic matters, is often expressed as a biochemical oxygen demand (BOD).
상기한 생물학적 처리방법중에서 종래에 주로 사용된 활성오니법은, 스크린조를 거친 유입수를 유량저장조에 저장한 후 활성오니조에서 유기물을 제거하고 최종 침강조에서 처리수에 포함되어 있는 슬러지를 침강시켜 그 일부를 활성오니조로 반송하고 침강조의 상등수를 최종적으로 소독하여 방류하는 공정으로 이루어져 있다.Among the biological treatment methods, the activated sludge method, which is mainly used in the related art, stores the influent water that has passed through the screen tank in a flow storage tank, removes organic matter from the activated sludge tank, and sediments the sludge contained in the treated water in the final settling tank. Part of the process is returned to the activated sludge tank and finally the supernatant of the settling tank is disinfected and discharged.
이와 같은 활성오니법은 비교적 넓은 면을 요하고 포기조 내에서의 체류시간이 길어지고 BOD가 30ppm이하로 처리되지 않으므로 처리수질이 양호하지 못하였다.Such activated sludge process requires a relatively large surface area, has a long residence time in the aeration tank, and the BOD is not treated at less than 30 ppm.
따라서, 이와 같은 활성오니법이 지닌 문제를 해결하기 위하여 최신의 기술로 알려진 생물막 여과공법을 사용하는데, 생물막 여과공법은 처리효율이 높아 적은 부지에 설치할 수 있고, 짧은 체류시간에도 BOD가 20ppm이하로 유지할 수 있으므로 고도의 처리수질을 얻을 수 있으며, 운전을 자동화하기 쉬운 여러 가지 장점이 있는 것으로 알려져 있다.Therefore, in order to solve the problem of the activated sludge process, the biofilm filtration method known as the latest technology is used. The biofilm filtration method can be installed on a small site with high processing efficiency, and the BOD is less than 20ppm even with a short residence time. It is known that there is a number of advantages that can be maintained because of the high quality of the treated water and easy to automate operation.
도 3은 통상의 생물막여과공법을 채택한 오폐수 처리공정을 개략적으로 나타낸 것으로, 협잡물의 분리를 위한 스크린조와 오폐수의 균일한 이송을 위한 유량조정조, 오폐수 중의 오염물질을 분해/제거하기 위한 생물막여과조, 처리수의 일시 저장 및 생물막여과조의 여과재세정을 위한 처리수조, 생물막여과조에서 증식된 미생물 슬러지를 침전분리하는 슬러지 분리기 및, 슬러지의 장기 저장 기능을 갖는 오니농축저류조로 구성되어 있다.Figure 3 schematically shows a wastewater treatment process employing a conventional biofilm filtration method, a screen bath for the separation of contaminants and a flow rate adjustment tank for the uniform transport of wastewater, biofilm filtration tank for decomposing / removing contaminants in the wastewater, treatment It consists of treatment tank for temporary storage of water and filtration of biofilm filtration tank, sludge separator for sedimentation of microbial sludge grown in biofilm filtration tank, and sludge concentration storage tank having long-term storage function of sludge.
하지만, 생물막여과공법은 여과재의 세정을 위해 별도의 펌프를 사용해야하므로 세정을 위한 상당한 동력이 요구되고, 생물막여과조 내부에 채워진 여과재의 세정이 적절하게 이루어지지 않으면 여과재에 슬러지가 과다하게 증식하여 오폐수 흐름을 방해하게 되므로 처리효율이 급격하게 떨어지는 문제점이 있었다.However, the biofilm filtration method requires a separate pump for cleaning the filter medium, which requires considerable power for cleaning, and if the filter medium filled in the biofilm filter tank is not properly cleaned, the sludge multiplies in the filter medium and the wastewater flows. There is a problem that processing efficiency drops sharply because it interferes with.
이러한 문제점을 해결하기 위해 사용되는 다른 생물막여과공법으로서 도 4에 도시된 바와 같이, 유입된 원폐수의 고형물 등이 침전분리되는 부패식정화조와, 분리된 폐수를 임시 저장하여 유량조정을 하는 유량조정조, 이 유량조정조의 폐수를 미생물이 부착된 여재로 충진된 생물막에 상향식으로 통과시켜 폐수의 오염물질을 처리하는 튜브형 생물막여과조 및, 이 튜브형 생물막여과조의 생물막을 세척한 세정수를 저장하는 세정수저장조로 구성된 것을 들 수 있다.As another biofilm filtration method used to solve this problem, as shown in FIG. 4, a septic tank for sedimentation and sedimentation of inflowed raw wastewater, and a flow regulating tank for temporarily adjusting the flow rate by storing the separated wastewater , A tubular biofilm filtration tank that passes the wastewater from the flow regulating tank upwardly through the biofilm filled with the microorganism-attached media to treat the contaminants of the wastewater; It may be composed of.
즉 유량조정조의 앞쪽으로 부패식정화조를 배치하고, 뒷쪽으로 튜브형 생물막여과조를 배치하여 소요동력을 줄이고 오폐수 처리효율을 개선할 수 있었다.In other words, it was possible to reduce the required power and improve the wastewater treatment efficiency by arranging the septic tank in front of the flow control tank and the tubular biofilm filtration tank in the rear.
그런데, 상기한 생물막여과공법은 생물막여과조에서 체류시간이 짧아서 양호한 처리능력을 갖는 장점이 있는 반면에, 유입수의 조건에 민감하여 처리수질이 균일하지 못하는 단점이 있었다.However, the biofilm filtration method described above has the advantage of having a good treatment capacity due to a short residence time in the biofilm filtration tank, while having a disadvantage in that the treated water quality is not uniform because it is sensitive to the inflow condition.
즉 이와 같은 생물막여과공법은 유입수 중의 부유물질 많으면 생물막여과조가 미생물의 BOD 성분 분해작용보다는 부유물질의 여과기능으로 주로 활용되므로 상대적으로 BOD 처리효율이 저하되는 한편, 유입수의 오염물질 농도가 높거나 유입수의 농도변화가 크면 상대적으로 짧은 체류시간 때문에 처리수에 미치는 영향이 크게 되었다.In other words, if the biofilm filtration method contains a lot of suspended solids in the influent, the biofilm filtration tank is mainly used as a filtration function of suspended solids rather than decomposing BOD components of microorganisms, so that the BOD treatment efficiency is relatively lowered, while the concentration of pollutants in the influent is high or the influent is infiltrated. The large change in the concentration of significantly affected the treated water due to the relatively short residence time.
또한, 협잡물 및 생물막여과조에서 발생한 미생물 슬러지를 부패식정화조에서 제거하도록 되어 부패조가 가득 찬 상태에서 정화조를 청소하지 못하게 되고, 생물막여과조의 역세에 의해 역세수가 한꺼번에 부패조로 유입될 경우 부패정화조에 쌓인 슬러지의 형을 교한하여 오염농도가 큰 슬러지 등이 생물막여과조로 유입되어 생물막여과조의 기능이 저하되는 단점이 있었다.In addition, the microbial sludge from the contaminants and biofilm filtration tank is removed from the septic tank to prevent the cleaning of the septic tank when the septic tank is full, and sludge accumulated in the septic tank when the backwash water flows into the septic tank at the same time due to the backwash of the biofilm filtration tank. The sludge, which has a large concentration of pollutants, is introduced into the biofilm filtration tank, thereby degrading the function of the biofilm filtration tank.
이에, 본 발명은 상기한 문제점을 해소하기 위해 안출된 것으로, 유입수질을 균등하게하여 처리수의 수질저하를 예방할 수 있으며, 역세에 의해 슬러지가 유입되어 생물막여과조의 기능이 저하되는 것을 방지할 수 있도록 된 생물막여과 오폐수 처리방법을 제공하는데 그 목적이 있다.Accordingly, the present invention has been devised to solve the above problems, it is possible to prevent the deterioration of water quality of the treated water by equalizing the inflow water quality, it is possible to prevent the sludge is introduced by backwashing to deteriorate the function of the biofilm filtration tank. The aim is to provide biofilm filtration wastewater treatment.
상기한 목적을 달성하기 위해 본 발명은, 오폐수가 유량조정조에 유입되어 계량조, 침전조, 집수조, 생물막여과조, 소독방류조, 처리수조를 차례로 거쳐 처리되는 오폐수처리공정과, 상기 계량조의 일부 오폐수를 유량조정조로 되돌리는 오폐수재순환공정과, 상기 침전조의 슬러지를 오니농축저류조에 저장하면서 상등수를 유량조정조로 되돌리는 슬러지처리공정과, 상기 처리수조의 일부 처리수가 생물막여과조의 생물막을 역세하고 사용된 역세수를 유량조정조로 되돌리는 처리수역세공정 및, 상기 생물막여과조에서 유출되는 처리수를 집수조로 되돌리는 처리수순환공정을 포함하여 이루어져 있다.In order to achieve the above object, the present invention, the waste water is introduced into the flow rate adjustment tank, the waste water treatment process is processed through a metering tank, sedimentation tank, collection tank, biofilm filtration tank, disinfection discharge tank, treatment water tank, and some waste water of the metering tank Wastewater recirculation process returning to the flow control tank, sludge treatment process for returning the supernatant water to the flow control tank while storing the sludge of the sedimentation tank in the sludge concentration tank, and some treated water in the treatment tank backwash the biofilm of the biofilm filtration tank A treated water washing step of returning the washing water to the flow rate adjusting tank and a treated water circulation step of returning the treated water flowing out of the biofilm filtration tank to the collecting tank.
이와 같은 본 발명에 따른 생물막여과 오폐수 처리방법에 의하면, 생물막여과조 앞쪽에 계량조와 침전조를 설치하여 1차적으로 부유물질과 협잡물질을 제거함으로써 유입수의 부유물질에 따른 수질저하를 방지할 수 있으며, 고농도의 유입수와 유입수의 농도변화에 따른 문제를 생물막여과조에서 유출되는 처리수를 침전조 후단으로 재순환시킴으로 유입수질을 균등화시킬 수 있게 되는 것이다.According to the biofilm filtration wastewater treatment method according to the present invention, by installing a metering tank and a sedimentation tank in front of the biofilm filtration tank to remove the suspended substances and contaminants first, to prevent water degradation due to the suspended substances in the influent, high concentration It is possible to equalize the influent quality by recycling the treated water flowing out of the biofilm filtration tank to the rear stage of the sedimentation tank.
도 1은 본 발명에 따른 생물막여과 오폐수처리 공정도,1 is a biofilm filtration wastewater treatment process according to the present invention,
도 2는 본 발명에 따른 생물막여과 오폐수처리의 유량흐름도,2 is a flow chart of the biofilm filtration wastewater treatment according to the present invention,
도 3은 종래기술에 따른 생물막여과 오폐수처리 공정도,3 is a biofilm filtration wastewater treatment process according to the prior art,
도 4는 종래기술에 따른 다른 생물막여과 오폐수처리 공정도이다.Figure 4 is another biofilm filtration wastewater treatment process according to the prior art.
*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10 : 유량조정조 12 : 침사조10: flow adjustment tank 12: sedimentation tank
14 : 스크린조 16 : 계량조14 screen tank 16 weighing tank
18 : 침전조 20 : 오니농축저류조18: sedimentation tank 20: sludge concentration storage tank
22 : 집수조 24 : 생물막여과조22: sump 24: biofilm filtration tank
26 : 처리수조 28 : 소독방류조26: treatment tank 28: disinfection discharge tank
이하, 본 발명의 바람직한 실시예를 예시도면을 참조하여 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 생물막여과 오폐수처리 공정도이고, 도 2는 본 발명에 따른 생물막여과 오폐수처리의 유량흐름도이다.1 is a flow chart of biofilm filtration wastewater treatment according to the present invention, Figure 2 is a flow chart of the biofilm filtration wastewater treatment according to the present invention.
본 발명에 따른 생물막여과 오폐수 처리방법은 도 1에 도시된 바와 같이, 오폐수가 유량조정조(10)에 유입되어 계량조(16), 침전조(18), 집수조(22), 생물막여과조(24), 처리수조(26), 소독방류조(28)를 차례로 거쳐 처리되는 오폐수처리공정과, 상기 계량조(16)의 일부 오폐수를 유량조정조(10)로 되돌리는 오폐수재순환공정, 상기 침전조(18)의 슬러지를 오니통축저류조(20)에 저장하면서 상등수를 유량조정조(10)로 되돌리는 슬러지처리공정, 상기 처리수조(26)의 일부 처리수가 생물막여과조(24)의 생물막을 역세하고 사용된 역세수를 유량조정조(10)로 되돌리는 처리수역세공정 및, 상기 생물막여과조(24)에서 유출되는 처리수를 집수조(22)로 되돌리는 처리수순환공정을 포함하여 이루어져 있다.Biofilm filtration wastewater treatment method according to the present invention, as shown in Figure 1, the wastewater flows into the flow adjustment tank 10, the metering tank 16, sedimentation tank 18, water collection tank 22, biofilm filtration tank 24, The wastewater treatment process which is processed through the treatment water tank 26, the disinfection discharge tank 28, and the wastewater recycling process which returns a part of the wastewater of the metering tank 16 to the flow rate adjustment tank 10, the sedimentation tank 18 of the Sludge treatment step of returning the supernatant water to the flow rate adjusting tank 10 while storing the sludge in the sludge tank storage tank 20, and some treated water in the treated water tank 26 backwashes the biofilm of the biofilm filtration tank 24 and uses the backwash water used. A treatment water washing step of returning to the flow rate adjusting tank 10 and a treatment water circulation step of returning the treated water flowing out of the biofilm filtration tank 24 to the collection tank 22.
도 2를 참조하여 보다 구체적으로 설명하면, 상기 유량조정조(10)는 생물막여과조(24)로 공급하는 오폐수의 양을 일정하게 유지하고 농도를 조절하도록 되어 오폐수의 급작스런 농도변화나 양의 변화를 최소화함으로써 폐수처리효율을 높이는 역할을 한다.Referring to Figure 2 in more detail, the flow rate adjustment tank 10 is to maintain a constant amount of waste water supplied to the biofilm filtration tank 24 and to adjust the concentration to minimize the sudden change in concentration or change in the amount of waste water Thereby increasing the wastewater treatment efficiency.
즉 유량조정조(10)는 생물막여과조(24)의 역세시 한꺼번에 역세수가 침전조(18)에 영향을 미치지 않도록 하며, 오폐수의 일정량을 저장한 상태로 침전조(18)로 이송시키게 된다.That is, the flow rate adjusting tank 10 prevents the backwashing water from affecting the sedimentation tank 18 at the same time when the biofilm filtration tank 24 is backwashed, and is transferred to the sedimentation tank 18 while storing a predetermined amount of waste water.
한편, 생활오폐수가 유량조정조(10)에 직접도달하기 전에 침사조(12)를 통해 모래 등을 제거하고, 고정스크린(14)을 통해 고형물 등을 제거하도록 되어 있다. 여기서, 고정스크린(14)는 50mm 정도의 간격이 좁게 형성되는 것이 바람직하다.On the other hand, before the municipal waste water reaches the flow control tank 10 directly, the sand and the like are removed through the sedimentation tank 12, and the solids and the like are removed through the fixed screen 14. Here, the fixed screen 14 is preferably formed in a narrow interval of about 50mm.
상기 계량조(16)는 침전조(18)에서 슬러지가 부유하는 것을 방지하도록 유량조정조(10)를 통해 나오는 오폐수를 일부만 침전조(18)로 보내고 나머지는 유량조정조(10)로 되돌려 보낸다.The metering tank 16 sends only a part of the wastewater from the settling tank 18 to the settling tank 18 to prevent sludge from floating in the settling tank 18 and returns the rest to the settling tank 10.
상기 침전조(18)는 유량조정조(10)에서 유입된 오폐수의 부유물질 등의 슬러지를 제거하여 슬러지는 오니농축저류조(20)에 저장하게 되며, 상등수는 재처리를 위해 유량조정조(10)로 되돌려 진다.The sedimentation tank 18 is to remove the sludge, such as suspended solids of the waste water introduced from the flow adjustment tank 10, the sludge is stored in the sludge concentration storage tank 20, the supernatant water is returned to the flow adjustment tank 10 for reprocessing Lose.
이에따라 슬러지처리공정에서는 침전조(18)의 침전된 협잡물이나 슬러지를 오니농축저류조(20)에 장기간 보존함으로써 슬러지관리의 효율을 기할 수 있게 된다.Accordingly, in the sludge treatment process, the sludges and sludge deposited in the sedimentation tank 18 can be stored in the sludge concentration tank 20 for a long time, thereby achieving efficiency of sludge management.
상기 집수조(22)는 침전조(18)에서 일차적으로 슬러지가 제거된 오수를 임시저장하고 일정한 양의 오수를 생물막여과조(24)로 이송시킨다.The sump tank 22 temporarily stores the sewage from which the sludge is removed in the sedimentation tank 18 and transfers a predetermined amount of the sewage to the biofilm filtration tank 24.
상기 생물막여과조(24)는 오수의 BOD성분을 분해하는 미생물의 서식지로서 오수가 통과하면 미생물이 오수의 BOD성분을 제거하게 된다.The biofilm filtration tank 24 is a habitat of microorganisms that decomposes BOD components of sewage, and when the sewage passes, the microbes remove the BOD components of the sewage.
즉 생물막여과조(24)는 호기성 미생물이 부착된 여과재를 충진하고 있어 여과재가 충진된 생물막을 폐수가 통과하면서 각종 유기물질과 부유물질 등을 여과한다.That is, the biofilm filtration tank 24 fills the filter medium with aerobic microorganisms attached thereto, and filters various organic substances and suspended substances while the wastewater passes through the biofilm filled with the filter medium.
상기 생물막여과조(24)의 여과재는 생물막여과조(24)의 크기에 2/3 정도로 꽉차게 형성되는 것이 바람직하다.The filter medium of the biofilm filtration tank 24 is preferably formed about 2/3 of the size of the biofilm filtration tank 24.
또한, 생물막여과조(24)는 다수개의 병렬식 콘크리트 구조물로 형성되어 오수의 미세한 슬러지가 걸러지도록 되는 것이 바람직하다. 여기서, 생물막여과조(24)는 다수의 병렬식으로 연결될 때 생물막 세척을 위해 필요한 동력을 줄일 수 있고, 폐수발생 유량에 맞게 개수를 조절하여 사용할 수 있게 된다.In addition, the biofilm filtration tank 24 is preferably formed of a plurality of parallel concrete structure to filter the fine sludge of the sewage. Here, the biofilm filtration tank 24 can reduce the power required for washing the biofilm when connected in a plurality of parallel, and can be used by adjusting the number according to the wastewater generation flow rate.
더욱이, 생물막여과조(24)를 병렬식 콘크리트구조물로 만들경우 기존의 철구조물에 비해 생물막여과조 자체의 가격을 줄일 수 있는 한편, 설치면적을 크게 줄여 공사비용을 절감할 수 있게 된다.Moreover, when the biofilm filtration tank 24 is made of parallel concrete structure, the cost of the biofilm filtration tank itself can be reduced compared to the existing steel structure, and the construction area can be greatly reduced to reduce the construction cost.
상기 처리수조(26)는 생물막여과조(24)에서 BOD성분이 제거되어 부유물질의 농도가 20ppm 이하인 처리수가 모이게 되는 한편, 처리수조(26)의 처리수는 소독방류조(28)에서 소독되어 방류되게 된다.The treatment tank 26 removes the BOD component from the biofilm filtration tank 24 to collect treated water having a concentration of suspended solids of 20 ppm or less, while the treated water of the treatment tank 26 is disinfected in the disinfection discharge tank 28 and discharged. Will be.
상기 처리수조(26)의 처리수 일부는 생물막여과조(24)의 재차 세정에 사용되고, 사용된 역세수는 유량조정조(10)로 되돌려 지도록 되어 있다. 여기서, 생물막여과조(24)의 역세수를 유량조정조(10)으로 되돌리는 이유는, 기존기술에서 생기는 역세수로 인해 부패정화조의 침전기능이 저하되어 침전되지 못한 슬러지가 생물막여과조로 유입되는 것을 방지하기 위함이다.A part of the treated water of the treated water tank 26 is used for washing the biofilm filtration tank 24 again, and the used backwash water is returned to the flow regulating tank 10. Here, the reason for returning the backwash water of the biofilm filtration tank 24 to the flow rate adjustment tank 10 is that the sludge function of the decay purification tank is deteriorated due to the backwash water generated in the existing technology, thereby preventing sludge that does not settle into the biofilm filtration tank. To do this.
이와 같은 본 발명의 구성에 의하면, 오폐수처리공정에서 생물막여과조(24) 앞쪽에 계량조(16)와 침전조(18)를 설치하여 부유물질을 일차적으로 제거함으로써 유입수의 부유물질에 의한 수질저하의 문제점을 해소할 수 있는 것에 특징이 있다.According to the configuration of the present invention, in the wastewater treatment process, by installing the metering tank 16 and the settling tank 18 in front of the biofilm filtration tank 24 to remove the suspended matter first, the problem of water quality deterioration due to the suspended matter in the influent. It is characterized by being able to solve the problem.
또한, 처리수순환공정에서 생물막여과조(24)로부터 유출되는 처리수를 집수조(22)로 되돌려 유입수질을 균등하게 함으로써 유입수의 농도변화와 고농도의 유입수에 대처할 수 있는 것에 특징이 있다.In addition, the treated water flowing out of the biofilm filtration tank 24 in the treatment water circulation process is characterized by being able to cope with the change in the concentration of the influent and the high concentration of the influent by returning the quality of the influent.
한편, 처리수역세정공정에서는 기존의 생물막여과공법에서 부패정화조의 슬러지나 생물막여과조의 역세에 의한 부패정화조의 슬러지 유입문제를 해결할 수 있게 된다.On the other hand, in the treated water cleaning process, it is possible to solve the problem of sludge inflow of sludge from the septic tank and backwash of the biofilm filtration tank in the existing biofilm filtration method.
이상에서 설명한 바와 같이 본 발명에 따른 생물막여과조 오폐수 처리방법에 의하면, 생물막여과조 앞쪽에 계량조와 침전조를 설치함으로써 유입수의 부유물질에 따른 수질저하를 방지할 수 있으며, 생물막여과조의 처리수를 집수조로 재순환함으로써 유입수질을 균등화 할 수 있게 된다.As described above, according to the biological membrane filtration wastewater treatment method according to the present invention, by installing a metering tank and a settling tank in front of the biofilm filtration tank, it is possible to prevent the water degradation due to the suspended substances in the influent, and recycle the treated water of the biofilm filtration tank to the collection tank This makes it possible to equalize influent water quality.
또한, 처리수조에서 생물막여과조로 역세정하고 이를 유량조정조로 되돌림으로써 역세공정이 간단하게 이루어지고, 역세를 위한 별도의 역세수저장조가 필요 없게 되는 한편, 기존기술에서 발생되는 역세수로 인해 침전기능이 저하에 따른 슬러지가 생물막여과조로 유입되는 문제를 해결할 수 있게 된다.In addition, backwashing from the treatment tank to the biofilm filtration tank and returning it to the flow control tank simplifies the backwashing process, eliminating the need for a separate backwash water storage tank for backwashing, and the backwashing water generated by the existing technology. It is possible to solve the problem of sludge flowing into the biofilm filtration tank.
한편, 침전조의 슬러지를 오니농축저류조에 장기 저장할 수 있으므로 슬러지를 효율적으로 처리할 수 있게 된다.On the other hand, the sludge of the sedimentation tank can be stored in the sludge storage tank for a long time, so that the sludge can be efficiently processed.
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