KR100465884B1 - High strength BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors - Google Patents

High strength BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors Download PDF

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KR100465884B1
KR100465884B1 KR10-2002-0023856A KR20020023856A KR100465884B1 KR 100465884 B1 KR100465884 B1 KR 100465884B1 KR 20020023856 A KR20020023856 A KR 20020023856A KR 100465884 B1 KR100465884 B1 KR 100465884B1
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treated water
anaerobic
rotating disc
water
tank
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KR10-2002-0023856A
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KR20030084525A (en
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한영교
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한영교
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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
    • C02F3/08—Aerobic processes using moving contact bodies
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

본 발명은 부착생물막을 이용한 축산폐수처리시 고농도의 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법에 관한 것으로, 복수개가 1조를 이루면서 조립시 벌집형태이고, 다수개가 적층된 회전원판을 회전시켜 처리수를 정화하는 방법이다. 회전원판을 처리수에 완전히 담그는 혐기성 공정과 회전원판의 일부만 담그는 무산소 공정을 통해서 고농도 유기물질제거와 질산화가 이루어지도록 하고, 상기 혐기성 공정과 무산소 공정을 거친 처리수에 회전원판 일부만을 담궈서 잔류유기물질 제거와 탈질이 이루어지는 재폭기 공정으로 구성된다. 상기한 회전원판은 수로가 동일선상에 위치하도록 하여 적층하고 회전원판의 회전력에 의한 수위차에 의하여 무동력으로 반송이 되어 처리비용이 저감되며, 고농도의 유기물질, 질소, 인이 완벽하게 제거 되도록 하고 유지 및 보수가 용이하도록 하는 것이다.The present invention relates to a method for simultaneously removing high concentrations of organic substances, nitrogen and phosphorus and reducing sludge generated during livestock wastewater treatment using adherent biofilms. It is a method of purifying treated water by rotating. The anaerobic process of completely immersing the rotating disc in the treated water and the anaerobic process of immersing only part of the rotating disc to remove high concentrations of organic substances and nitrification. It consists of a reaeration process in which removal and denitrification take place. The rotary discs are stacked in such a way that the channels are located on the same line, and are transported with no force due to the water level difference due to the rotational force of the rotary discs, thereby reducing the processing cost, and completely removing high concentrations of organic substances, nitrogen, and phosphorus. It is to facilitate maintenance and repair.

Description

부착생물막법으로 축산폐수처리시 고농도 유기물질 · 질소 · 인의 동시제거와 발생오니의 저감화방법 {High strength BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors}High concentration BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors}

본 발명은 부착생물막법으로 축산폐수처리시 고농도 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법에 관한 것으로, 보다 상세하게는 회전원판의 전부를 처리수에 담궈서 유기물질 제거와 질산화가 이루어지도록 하는 혐기성공정과 무산소 공정을 거치도록 하고, 이후에 회전원판의 일부만을 오수에 담궈서 잔류유기물질 제거와 탈질이 일어나도록 하는 재폭기공정을 거침으로써 유기물질과 질소를 제거하도록 하는 것이며, 축산폐수와 같이 고농도 폐수의 처리효율이 대폭증가 되도록 하는 부착생물막을 이용한 고농도 유기물질, 질소, 인 제거와 발생오니 저감화방법에 관한 것이다.The present invention relates to a method of simultaneously removing high concentrations of organic substances, nitrogen and phosphorus and reducing sludge generated during the treatment of livestock wastewater by the adhesion biofilm method. More specifically, organic matters are removed and nitrified by immersing all of the rotating discs in treated water. Anaerobic and anoxic processes, which are used for the production process, and afterwards, only part of the rotating disc is immersed in sewage to remove organic matter and nitrogen by reaeration process to remove residual organic matter and denitrification. As described above, the present invention relates to a method for removing high-concentration organic matter, nitrogen, phosphorus, and reducing sludge using attached biofilms to greatly increase the treatment efficiency of high concentration wastewater.

한편, 상기 부착생물막법중에서 회전원판을 이용한 부착생물막법은 본 출원인의 선출원건인 특허출원 93-15753호에 그 기술이 공지되어 있으며, 그 구성을 하기에서 첨부한 도면 도1a내지 도2를 참조하여 간략하게 살펴본다.On the other hand, the adhesion biofilm method using a rotating disc of the adhesion biofilm method is known in the patent application No. 93-15753, the applicant's prior application, the configuration is referred to the accompanying drawings in Figures 1a to 2 Let's take a quick look.

도1a는 종래의 부착생물막법에 이용되는 회전원판체를 나타내는 사시도이고, 도1b는 도1a의 회전원판체의 조립상태를 나타내는 사시도이며, 도1c는 종래의 회전원판 접촉조를 나타내는 부분 단면도이고, 도2는 종래의 회전원판을 이용한 오수 처리공정을 나타내는 공정도이다.Fig. 1A is a perspective view showing a rotating disc body used in the conventional biofilm method, Fig. 1B is a perspective view showing the assembled state of the rotating disc body in Fig. 1A, and Fig. 1C is a partial sectional view showing a conventional rotating disc contacting tank. 2 is a process chart showing a sewage treatment process using a conventional rotating disc.

종래의 부착생물막법을 이용한 정화장치 즉, 회전원판을 이용한 생물학적 정화장치는 고밀도 폴리에틸렌에 흑색 도장처리되고 도1a에 나타내는 바와 같이 원주를 따라 다수의 요철부가 소정형상으로 형성된 부채꼴형의 회전원판체(6)를 중공축(도1c에 도시 ; 4)을 중심으로 도1b에 나타내는 바와 같이 원형이 되게 조합하여 도1c에 나타내는 바와 같이 복수개의 회전원판(8)에 의하여 수로(10)가 형성되도록 중공축(4)의 외주로 적층하되, 수로(10)가 지그재그식으로 위치되도록 회전원판(8)을 배치하고, 이와 같이 형성된 회전원판(8)을 그 표면적의 40%는 처리수(40)속에 잠기고 60%는 공기중에 노출되도록 회전원판 접촉조(1)에 설치한다.Conventional purification apparatus using the attached biofilm method, that is, biological purification apparatus using a rotating disc is a fan-shaped rotating disc body having a black coating on a high density polyethylene and a plurality of irregularities are formed in a predetermined shape along the circumference as shown in FIG. 6) in a circular manner as shown in FIG. 1B centering on the hollow shaft (shown in FIG. 1C; 4) so that the channel 10 is formed by a plurality of rotating disks 8 as shown in FIG. 1C. Lay out to the outer periphery of the shaft 4, the rotary disk 8 is arranged so that the channel 10 is located in a zigzag manner, and the rotary disk 8 thus formed is 40% of the surface area in the treated water 40. It is installed in the rotating disc contact tank (1) so that it is exposed to 60% in the air.

한편, 도면중 미설명부호 23은 중공축(4)을 회전시키는 모터를 나타낸다.In the drawings, reference numeral 23 denotes a motor for rotating the hollow shaft 4.

이와 같이 형성된 회전원판 접촉조(1)는 도2에 나타내는 바와 같이 설치되어 오수를 처리하게 되며, 그 공정을 하기에서 살펴본다.The rotating disc contacting tank 1 thus formed is installed as shown in FIG. 2 to treat sewage, and the process will be described below.

먼저, 침사조(15) 및 유량조(16)를 거쳐 펌프(17)에 의해 회전원판접촉조(1)로 유입된 유입수(14)는 회전원판(도1a내지 도1c에 도시 ; 8)이 천천히 회전함에 따라 수로(도1c에 도시 ; 10)내로 유입되어 원주운동을 하게 되므로 처리수가 공기와 접촉하면서 미생물을 활성화시켜 상기 미생물에 의하여 처리수가 정화되고, 이와 같이 회전원판접촉조(1)에서 정화처리한 처리수는 최종침전조(18)로 이송시켜 슬러지(19)를 슬러지농축조(2)에서 농축한 다음 슬러지 저류조(21)에 저장 후 슬러지(19)는 처분하고 상징수(22)는 회전원판접촉조(1)로 보내 재처리하며 최종침전조(18)에서 정화처리된 물을 소독조(24)로 공급하여 소독처리한 후 방류하게 되는 것이다.First, the inflow water 14 introduced into the rotary disc contacting tank 1 by the pump 17 via the immersion tank 15 and the flow rate tank 16 is a rotary disc (shown in FIGS. 1A to 1C; 8). As it rotates slowly, the water flows into the waterway (shown in FIG. 1C; 10) and performs a circumferential motion. Thus, the treated water is activated by the microorganisms while contacting the air, and the treated water is purified by the microorganisms. The treated water is transferred to the final settling tank 18, the sludge 19 is concentrated in the sludge concentration tank 2, and then stored in the sludge storage tank 21, and then the sludge 19 is disposed of and the supernatant water 22 is rotated. It is sent to the disc contact tank (1) for reprocessing and the purified water in the final settling tank (18) is supplied to the disinfection tank (24) to disinfect and then discharged.

그러나, 상기한 바와 같은 종래의 부착생물막법에 의하면, 질소 및 인의 제거율이 낮고, 수로가 지그재그형으로 형성되도록 회전원판이 적층되어 있어서 회전원판에서 탈리된 오니가 원활하게 배출되지 못하게 되는 문제점이 있었다.However, according to the conventional adhesion biofilm method as described above, there is a problem that the removal rate of nitrogen and phosphorus is low, and the rotating discs are laminated so that the waterways are formed in a zigzag shape, and sludges detached from the rotating discs cannot be discharged smoothly. .

상기한 바와 같은 문제점을 해결하기 위한 본 발명의 목적은 혐기성 처리조에서 회전원판을 처리수에 완전히 담궈서 고농도 유기물질 제거와 질산화가 이루어지도록 하는 혐기성 처리공정과, 무산소 처리조에서 이루어지며 회전원판을 완전히 담그고 별도의 산소를 공급하지 않고 유기물질 제거와 질산화가 이루어지도록 하는 무산소 처리공정, 무산소 처리공정을 거친 처리수를 재폭기 처리조에서 회전원판의 일부만을 담궈서 잔류유기물질과 탈질이 이루어 지도록 하는데 있어서, 회전원판의 회전력과 수위차에 의하여 무산소 처리조에서 혐기성 처리조로 처리수의 5∼20배 무동력 반송시키고, 재폭기 처리조에서 무산소 처리조로 처리수의 0.5∼20배를 무동력 반송시키며, 침전조에서 혐기성 처리조로 처리수의 0.1∼10배 반송시킴과 동시에 무산소처리조에도 처리수의 0.1∼10배 반송시켜 고농도 유기물질과 질소, 인을 완벽하게 제거하는데 있다.An object of the present invention for solving the problems as described above is made in the anaerobic treatment process to completely immerse the rotary disk in the treated water in the anaerobic treatment tank to remove the high concentration of organic substances and nitrification, and in the anaerobic treatment tank to make the rotary disk The oxygen-free treatment and oxygen-free treatment process, which completely immerses and removes organic materials and does not supply oxygen, immerses only a part of the rotating disc in the reaeration treatment tank so that residual organic matter and denitrification are achieved. In which the rotational force and the level difference between the rotating discs are 5 to 20 times of non-hydrodynamic transfer of the treated water from the anaerobic treatment tank to the anaerobic treatment tank, and 0.5-20 times the treated water is returned to the anaerobic treatment tank from the reaeration treatment tank. To anaerobic treatment tank to return 0.1 to 10 times of treated water The lyso is also returned 0.1 to 10 times of the treated water to completely remove high concentrations of organic substances, nitrogen and phosphorus.

도1a는 종래의 부착생물막법에 이용되는 회전원판체를 나타내는 사시도1A is a perspective view showing a rotating disc used in a conventional biofilm method

도1b는 도1a의 회전원판체의 조립상태를 나타내는 사시도Figure 1b is a perspective view showing the assembled state of the rotating disk body of Figure 1a

도1c는 종래의 회전원판 접촉조를 나타내는 부분단면도Figure 1c is a partial cross-sectional view showing a conventional rotating disk contact bath

도2는 종래의 회전원판을 이용한 처리공정을 나타내는 공정도Figure 2 is a process diagram showing a processing step using a conventional rotating disc

도3은 본 발명에 따른 회전원판의 적층구조를 나타내는 사시도Figure 3 is a perspective view showing the laminated structure of the rotating disc according to the present invention

도4는 본 발명에 따른 축산폐수 처리시 고농도 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법을 나타내는 공정도Figure 4 is a process chart showing a method for simultaneously removing high concentrations of organic substances, nitrogen and phosphorus and reducing sludge generated during livestock wastewater treatment according to the present invention.

* 도면의 주요부분에 대한 부호와 설명 *Codes and descriptions of the main parts of the drawings

56 : 혐기성 처리조56: anaerobic treatment tank

58 : 무산소 처리조58: anoxic treatment tank

57, 59, 61 : 회전원판57, 59, 61: rotating disc

60 : 재폭기 처리조60: reaeration treatment tank

62 : 침전조62: sedimentation tank

상기한 바와 같은 목적을 달성하기 위한 본 발명의 실시예를 하기에서 첨부된 도면을 참조하여 상세하게 살펴본다.An embodiment of the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

도3은 본 발명에 따른 회전원판의 적층구조를 나타내는 사시도이고, 도4는 본 발명에 따른 축산폐수 처리시 고농도 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법을 나타내는 공정도이다.Figure 3 is a perspective view showing a laminated structure of the rotating disc according to the present invention, Figure 4 is a process chart showing a simultaneous removal of high concentrations of organic substances, nitrogen, phosphorus and reducing sludge generated during the livestock wastewater treatment according to the present invention.

본 발명은 부착생물막법을 이용한 축산폐수처리시 고농도의 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법에 관한 것으로, 복수개가 1조를 이루면서 조립시 벌집형태가 되며, 수로를 형성하도록 다수개가 적층된 회전원판을 회전시켜 처리수를 정화하는 방법이다. 회전원판을 처리수에 완전히 담궈서 고농도 유기물질제거와 질산화가 이루어지도록 하는 혐기성 공정을 거친 처리수에 회전원판을 완전히 담궈서 별도의 산소투입 없이 유기물질 제거와 질산화가 이루어지도록 하는 무산소 공정을 거친 뒤, 상기 무산소 공정을 거친 처리수에 회전원판 일부만을 담궈서 잔류유기물질 제거와 탈질(탈기)이 이루어지는 재폭기 공정으로 구성된다.그리고, 본 발명에서 질산화과정을 혐기성공정과 무산소공정에서 진행하는 것은, 본원이 처리하고자 하는 폐수의 BOD가 고농도이기 때문에 폐수에 포함된 유기물질을 완벽하게 제거하기 위해서는 혐기성세균인 메탄균에 의하여 유기물질을 CH4와 이산화탄소로 분해하여야 하며, 만약 호기성세균을 사용할 경우 유기물질제거가 거의 이루어지지 않게 되므로, 작업공정을 간소화하기 위하여 유기물질 제거와 질산화를 위하여 호기성공정을 거치지 않고 용존산소를 이용하여 유기물질 제거와 질산화를 수행하는 혐기성공정과 무산소공정을 이용하는 것이다.The present invention relates to a method for simultaneously removing high concentrations of organic substances, nitrogen, and phosphorus and reducing sludge generated during livestock wastewater treatment using the attached biofilm method, and becomes a honeycomb form when assembling a plurality, forming a channel and forming a plurality of channels. It is a method of purifying a process water by rotating the rotating disc which laminated | stacked the dog. After completely immersing the rotating disc in the treated water, the anaerobic process to remove high concentration organic matter and nitrification is carried out. It consists of a re-aeration process in which only a part of the rotating disc is immersed in the treated water subjected to the anoxic process to remove residual organic matter and denitrification (degassing). In the present invention, the nitrification process is performed in the anaerobic process and the anoxic process. Since the BOD of the wastewater to be treated is high, in order to completely remove the organic matter contained in the wastewater, the organic matter must be decomposed into CH 4 and carbon dioxide by an anaerobic bacterium, methane, and if aerobic bacteria are used, Since the removal is rarely done, the process is simplified For this purpose, anaerobic and anoxic processes are used to remove and nitrate organic substances by using dissolved oxygen instead of undergoing aerobic processes for organic substance removal and nitrification.

한편 상기한 본 발명에서 회전원판(50)은 도3에 나타내는 바와 같이 수로(51)가 동일선상에 위치하도록 적층하여 오니의 배출이 쉽고, 공기와 처리수(축산폐수)의 유입이 원활하도록 하며, 조립선이 있고 적층시 단면이 벌집형태가 되며, 회전원판(50)의 수명을 반영구적으로 하기 위하여 고밀도 폴리염화비닐이나 폴리프로필렌, 혹은 폴리에틸렌에 카본블랙을 총중량으로 기준으로 0.1∼3중량% 첨가하고, 자외선 차단제를 총중량을 기준으로 0.05∼3중량% 첨가하여 형성한다.On the other hand, in the present invention, the rotary disc 50 is stacked so that the water channel 51 is located on the same line as shown in Figure 3 so that the discharge of sludge is easy, and the inflow of air and treated water (livestock wastewater) is smooth. , There is an assembly line and the cross section becomes a honeycomb when laminated, and 0.1 to 3% by weight of carbon black is added to the high density polyvinyl chloride, polypropylene, or polyethylene in order to semi-permanently reflect the life of the rotating disc 50. And it forms by adding 0.05 to 3 weight% of sunscreens based on total weight.

그리고 상기 혐기성 공정, 무산소 공정에서 처리수의 BOD를 95%이상 제거하기 위하여는 BOD부하=5∼120g/㎡Day이하, 수량부하=0.1∼10ℓ/㎡Day이하, 체류시간=2∼20시간 이상으로 하고, 처리수의 NH3-N을 95%이상 질산화 하기 위하여는 처리수의 BOD농도=5∼100mg/ℓ이하, pH=5∼9.5, 잔류알카리도=20∼100mg/ℓ 및 NH3-N부하=0.1∼10g-NH3-N/㎡Day이하로 하고, NO3-N을 90%이상 탈질하기 위하여는 NO3-N부하 2∼30g-NO3-n/㎡Day이하, CMEOH/N비=2.5이상으로 하고, pH=5∼9.5를 유지하기 위하여 알카리보조제(NaHCO3, Na2CO3, NaOH)를 첨가하고, 무산소 공정을 수행하는 무산소처리조에서 혐기성 공정을 수행하는 혐기성 처리조로 처리수의 0.5∼20배를 무동력 반송시키고, 재폭기공정을 수행하는 처리조에서 무산소 처리조로 처리수의 0.5∼20배를 무동력 반송시키며, 침전공정을 수행하는 침전조에서 혐기성 처리조로 처리수의 0.1∼10배 반송시킴과 동시에 무산소 처리조에도 처리수의 0.1∼10배 반송시키면 발생오니를 80중량%이상 저감시킬 수 있다.In order to remove more than 95% of the BOD of the treated water in the anaerobic process and the anaerobic process, BOD load = 5 to 120 g / m 2 Day or less, water load = 0.1 to 10 l / m 2 Day or less, residence time = 2 to 20 hours or more In order to nitrify 95% or more of NH 3 -N in the treated water, the BOD concentration of the treated water = 5 to 100 mg / l or less, pH = 5 to 9.5, the residual alkalinity = 20 to 100 mg / l, and NH 3 -N load = 0.1~10g-NH 3 below -N / ㎡Day and to the NO 3 -N to NO x removal is more than 90% NO 3 -N loads 2~30g-NO 3 -n / ㎡Day below, C MEOH / with N ratio of 2.5 or more, and the anaerobic treatment of adding the alkaline adjuvant (NaHCO 3, Na 2 CO 3 , NaOH) to maintain a pH = 5~9.5, and perform the anaerobic process in the anaerobic treatment tank to perform an oxygen-free process 0.5 to 20 times the power of the tank to be non-powered conveyed, 0.5 to 20 times the power of non-oxygen treated tank to the oxygen-free treatment tank in the re-aeration process to carry out the precipitation process By returning 0.1 to 10 times the treated water from the settling tank to the anaerobic treatment tank, and returning 0.1 to 10 times the treated water to the anoxic treatment tank, the generated sludge can be reduced by more than 80% by weight.

또한 상기공정에서 인의 제거효율을 높이기 위하여 본발명 실시에서는 탈인용 응집제로써 알루미늄을 사용한다.In addition, in order to increase the removal efficiency of phosphorus in the above process, the present invention uses aluminum as a coagulant for dephosphorization.

상기한 바와 같은 본 발명에 따른 부착생물막법으로 축산폐수처리시 고농도 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법을 하기에서 도4를 참조하여 살펴보면,Looking at the method of simultaneously removing high concentrations of organic substances, nitrogen, phosphorus and reducing sludge generated during the livestock wastewater treatment by the attached biofilm method according to the present invention as described above with reference to FIG.

처리수조(52)에 저장된 축산폐수는 계량조(54)를 거쳐 혐기성공정을 수행하는 혐기성 처리조(56)로 소량씩 투입되는데, 이때 회전원판(57)은 100% 침적되며, 2∼8시간 체류하면서 유기물질이 제거됨과 동시에 질산화가 이루어 지는데 처리수중의 유기물질 일부는 회전원판(57)에 부착된 미생물과 접촉하여 CO2와 H2O로 변화되고, 나머지 일부는 미생물의 세포합성에 이용되는데 이러한 세포합성공정에서 처리수중의 유기물질량이 작으면 미생물은 자신의 세포질을 분해함으로써 에너지를 얻게되고, 이러한 것을 최대이용하여 발생오니를 저감화 할 수 있다. 유입되는 처리수는 고농도이므로 침전조(62)의 하부 슬러지를 반송함으로서 유입되는 처리수의 희석과 발생오니 저감화가 이루어진다.The livestock wastewater stored in the treatment tank 52 is introduced into the anaerobic treatment tank 56 which carries out the anaerobic process via the metering tank 54, in which the rotating disc 57 is 100% deposited, for 2 to 8 hours. At the same time, organic matter is removed and nitrification occurs. Some of the organic matter in the treated water is converted into CO 2 and H 2 O in contact with the microorganism attached to the rotating disc 57, and the other part is used for cell synthesis of the microorganism. In this cell synthesis process, if the amount of organic matter in the treated water is small, the microorganism gets energy by decomposing its own cytoplasm, which can be used to reduce the generated sludge. Since the inflow of treated water is high concentration, the sludge of the sedimentation tank 62 is transported to dilute and reduce the sludge generated.

또한 유입처리수에 무산소 처리조(58)에서 배양된 미생물을 회전원판(59)의 회전력에 의한 수위차로 무동력 내부반송 시켜 처리수의 희석과 동시에 미생물을 오랜시간 체류시켜 발생오니를 감소시킨다.In addition, the microorganisms cultured in the oxygen-free treatment tank 58 in the inflow treatment water are transported internally in a non-motorized manner by the water level difference due to the rotational force of the rotary disk 59, and the microorganisms are kept for a long time at the same time as dilution of the treated water to reduce the sludge generated.

무산소처리조(58)는 혐기성처리조(56)에서 1차처리된 처리수가 유입되어 유기물질 제거와 질산화가 일어나며 회전원판(59)의 미생물은 별도의 산소 투입 없이도 결합산소 즉, 물속의 용존산소를 이용하여 미생물 세포합성이 이루어지며, 내부반송은 재폭기 처리조(60)와의 수위차로 하고, 2∼8시간 체류로 질산화를 완료시키는데, 질산화는 회전원판(59)에 부착·증식하는 탈질균이 수중의 NO3 -또는 NO2 -중의 산소를 이용하여 유기성탄소를 대사하는 성질을 이용하는 것으로 산소원으로 사용된 질소화합물은 환원되어 N2가스로 방출되는데, 이 공정에서 필요로한 탄소원은 처리수의 BOD를 이용한다.The anaerobic treatment tank 58 enters the first treated water from the anaerobic treatment tank 56 to remove organic matter and nitrify the microorganisms of the rotary disc 59 without binding oxygen, that is, dissolved oxygen in water. The microbial cell synthesis is made by using the internal transport, the level of the internal aeration with the reaeration treatment tank (60), and complete nitrification by staying for 2 to 8 hours, nitrification denitrifying bacteria attached to and proliferated on the rotating disc (59) It utilizes the property of metabolizing organic carbon by using oxygen in NO 3 - or NO 2 - in water. The nitrogen compound used as the oxygen source is reduced and released as N 2 gas. Use a number of BODs.

이와 같이 무산소 처리조(58)에서 질산화 반응이 종료되면 무산소처리조(58)의 처리수는 재폭기 처리조(60)로 투입되고, 이때 재폭기 처리조(60)의 회전원판(61)은 일부가 처리수에 담궈진다. 이와 같이 재폭기 처리조(60)로 유입된 처리수는 체류시간 2∼10시간으로 하여 잔류슬러지 농도를 감소시키면, 물속의 질소가스가 외부로 배출되므로, BOD 95%이상, 질소 95%이상, 인 95%이상 제거되며, 용존산소(DO)를 5∼6mg/ℓ로 유지시킬 수 있다.한편, 상기한 구성에서 처리수를 회전원판(59)(61)의 회전력에 의한 수위차로 무동력 반송시키는 방법은, 공중에 노출된 회전원판(59)(61)이 수몰되면서 처리수조 내의 회전원판(59)(61)수몰부의 수위는 회전원판(59)(61)의 수몰공정에서 발생되는 압력과 마찰력 등에 의하여 정상수위에서 다소 저하되며, 회전원판(59)(61)이 수몰되었다 수면위로 노출될경우는 회전원판(59)(61)의 원심력등에 의하여 원판끝을 따라 수위가 상승되므로, 수위가 상승되는 부분에서 이전단계의 수위가 저하되는 부분으로 자연적인 처리수의 흐름이 발생되므로, 무산소 처리조(58)에서 혐기성 처리조(56)로, 재폭기 처리조(60)에서 무산소 처리조(58)로 처리수가 흐르는 관로를 형성하면 동력을 필요로 하지 않는 처리수의 자연적인 반송이 이루어지게 되는 것이다.상기한 바와 같은 처리공정을 거쳐서 축산폐수를 처리한 결과는 표1에 나타내었다.When the nitrification reaction is completed in the anoxic treatment tank 58 as described above, the treated water of the anoxic treatment tank 58 is introduced into the reaeration treatment tank 60, and the rotating disc 61 of the reaeration treatment tank 60 is Some are soaked in the treated water. As such, the treated water introduced into the reaeration treatment tank 60 has a residence time of 2 to 10 hours, and when the residual sludge concentration is reduced, nitrogen gas in the water is discharged to the outside, so that BOD 95% or more, 95% or more nitrogen, 95% or more of phosphorus is removed, and dissolved oxygen (DO) can be maintained at 5 to 6 mg / l. On the other hand, in the above-described configuration, the treated water is conveyed in a non-motorized manner due to the difference in water level due to the rotational force of the rotating discs 59 and 61. The method is based on the pressure and frictional force generated in the submerged process of the rotating disk (59) 61 while the rotating disk (59) 61 exposed to the air submerged. The water level is slightly lowered from the normal water level, and the rotating disks 59 and 61 are submerged. When exposed to the surface of the water, the water level rises along the end of the disk due to the centrifugal force of the rotating disks 59 and 61. Flow of natural treated water Therefore, if a conduit flows through which the treated water flows from the anaerobic treatment tank 58 to the anaerobic treatment tank 56 and the reaeration treatment tank 60 to the anaerobic treatment tank 58, the treatment water does not require power. Natural conveyance is achieved. The results of treating livestock wastewater through the above-described treatment process are shown in Table 1.

따라서, 본 발명에 의하면 축산폐수중의 질소와 인을 95%이상 제거하고, BOD를 95%이상 제거할 수 있게 되었다.Therefore, according to the present invention, at least 95% of nitrogen and phosphorus in the livestock wastewater can be removed, and at least 95% of BOD can be removed.

상기한 바와 같이 구성된 본 발명에 의하면 축산폐수의 고농도 유기물질, 질소와 인이 완벽하게 제거되므로, 질소와 인으로 인한 부영양화 및 적조현상을 방지할 수 있어서, 환경오염을 방지하는 효과가 크고, 부착생물막을 이용하므로 미생물의 먹이 연쇄가 길어 미생물의 자기분해에 의하여 슬러지 발생량이 작으며, 소비전력이 작고, 단시간 접촉에도 높은 정화율을 얻을 수 있어 기존처리방법으로 처리가 어려운 축산폐수등 고농도 유기물질, 질소, 인의 동시제거와 발생오니량을 저감화 할 수 있다.According to the present invention configured as described above, since the high concentration of organic matter, nitrogen and phosphorus in the livestock wastewater is completely removed, it is possible to prevent eutrophication and red tide caused by nitrogen and phosphorus, so that the effect of preventing environmental pollution is large, adhesion As biofilms are used, the food chain of microorganisms is long, so sludge generation is small due to microorganism's self-decomposition. Simultaneous removal of nitrogen, phosphorus and phosphorus can reduce the amount of sludge generated.

Claims (1)

혐기성 처리조에서 회전원판을 처리수에 완전히 담궈서 유기물질 제거와 질산화가 이루어지도록 하는 혐기성 공정과, 상기 혐기성 공정을 거친 처리수를 제공받아 무산소 처리조에서 회전원판을 일부만 처리수에 담궈서 유기물질 제거와 질산화가 이루어지도록 하는 무산소 공정 및, 상기 무산소 공정을 거친 처리수를 제공받아 재폭기조에서 회전원판의 일부만을 담궈서 잔류유기물질 제거와 탈질이 이루어 지도록 하는 재폭기 공정을 수행한 후 침전조에서 침전공정을 거쳐, 유기물질 제거와 탈질 및 발생오니 감소가 이루어지도록 하되,In the anaerobic treatment tank, the anaerobic process is completely immersed in the treated water to remove organic substances and nitrification, and the anaerobic process is provided with the treated water through which the rotating disc is partially immersed in the treated water to remove organic substances. Oxygen-free process for nitriding and nitrification, and the reaeration process to remove residual organic matter and denitrification by submerging only a portion of the rotating disc in the reaeration tank with the treated water undergoing the anoxic process, followed by the precipitation process in the sedimentation tank. Through the organic material removal and denitrification and generation to be reduced, 상기 혐기성 공정과 무산소 공정에서는 BOD부하=5∼120g/m2Day이하, 수량부하=0.1∼10ℓ/㎡Day이하, 체류시간=2∼20시간 이상, NH3-N부하=0.1∼10g/㎡Day이하, NO3-N부하=2∼30g-NO3-N/㎡Day이하, 잔류알카리도=20∼100mg/ℓ, CMEOH/N비=1.5∼2.5이상 으로 하고 pH=5∼9.5를 유지하기 위하여 알카리보조제(NaHCO3, Na2CO3, NaOH)를 첨가하며,In the anaerobic and anoxic processes, BOD load = 5 to 120 g / m 2 Day or less, water load = 0.1 to 10 l / m 2 Day or less, residence time = 2 to 20 hours or more, NH 3 -N load = 0.1 to 10 g / m 2 Day or less, NO 3 -N load = 2 ~ 30g-NO 3 -N / m 2 Day or less, residual alkalinity = 20 ~ 100mg / l, C MEOH / N ratio = 1.5 ~ 2.5 or above and pH = 5 ~ 9.5 In order to add an alkali adjuvant (NaHCO 3 , Na 2 CO 3 , NaOH), 무산소공정에서 혐기성공정으로 처리수의 0.5∼20배를 무동력 반송시키고, 재폭기공정에서 무산소공정으로 처리수의 0.5∼20배를 무동력 반송시키며, 침전공정에서 혐기성공정으로 0.1∼10배 반송시키고, 또한 침전공정에서 무산소공정으로 처리수의 0.1∼10배 반송시키되, 상기한 무동력 반송은 공중에 노출된 회전원판이 수몰되면서 발생되는 처리수조 내의 수위저하와 회전원판이 수몰되었다 수면위로 노출될경우 발생되는 수위 상승을 이용하여, 수위가 상승되는 부분에서 이전단계의 수위가 저하되는 부분으로 처리수가 흐르도록 하는 것을 특징으로 하는 부착생물막법으로 축산폐수처리시 고농도 유기물질, 질소, 인의 동시제거와 발생오니의 저감화 방법.0.5 to 20 times of the treated water is returned to the anaerobic process from anaerobic process to zero power, 0.5 to 20 times of the treated water is returned to the anaerobic process from the reaeration process to 0.1 to 10 times of anaerobic process, and In addition, 0.1 to 10 times of the treated water is returned to the anoxic process in the precipitation process, but the non-powered conveyance occurs when the water level is lowered in the treated water tank and the rotating disc is submerged when the rotating disc exposed to the air is submerged. By using the raised water level, the treated water flows from the portion where the water level rises to the portion where the previous water level decreases, and simultaneously removes and generates high concentrations of organic substances, nitrogen, and phosphorus during livestock wastewater treatment. Reduction method of sludge.
KR10-2002-0023856A 2002-04-24 2002-04-24 High strength BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors KR100465884B1 (en)

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