KR20090085918A - Method of reducing return water and sludge in sewage treatment plant - Google Patents

Method of reducing return water and sludge in sewage treatment plant Download PDF

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KR20090085918A
KR20090085918A KR1020080011847A KR20080011847A KR20090085918A KR 20090085918 A KR20090085918 A KR 20090085918A KR 1020080011847 A KR1020080011847 A KR 1020080011847A KR 20080011847 A KR20080011847 A KR 20080011847A KR 20090085918 A KR20090085918 A KR 20090085918A
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South Korea
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sludge
water
sewage treatment
treatment plant
tank
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KR1020080011847A
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Korean (ko)
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박성용
최영이
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주식회사 이시엘
최영이
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Publication of KR20090085918A publication Critical patent/KR20090085918A/en

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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
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • 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
    • Y02W10/20—Sludge processing

Abstract

A method for reducing sludge and returned water of a sewage treatment plant is provided to reduce the number of a dehydrator with increase of dewatering efficiency, and to maximize quality of the processed water. A method for reducing sludge and returned water of a sewage treatment plant includes the following steps of: improving water quality while passing flowed sewage through a settling tank(2,4), an aeration tank(3), a concentration tank(5), a digestion tank(6) and a dehydrator(8); performing pre-processing of sludge and overflow water generated in the digestion tank by preparing a sludge concentration member(7) between the digestion tank and the dehydrator; and transferring filtrate to the settling tank; and discharging the sludge into the dehydrator. The sludge concentration member is a belt-shaped or a drum-shape concentration facility.

Description

하수처리장의 반려수 및 슬러지를 저감시키는 방법{Method of reducing return water and sludge in sewage treatment plant}Method of reducing return water and sludge in sewage treatment plant}

본 발명은 하수처리장의 반려수 및 슬러지를 저감시키는 방법에 관한 것으로서, 더욱 상세하게는 오폐수 속에 함유되어 있는 오염물질을 효과적으로 제거하여 처리수질을 개선하는 한편 처리비용을 절감할 수 있는 하수처리장의 반려수 및 슬러지를 저감시키는 방법에 관한 것이다. The present invention relates to a method for reducing companion water and sludge in a sewage treatment plant. More particularly, the present invention relates to a sewage treatment plant that can effectively remove pollutants contained in waste water to improve treated water quality and reduce treatment costs. It relates to a method of reducing water and sludge.

일반적으로 하수처리장에서는 하수, 오수, 폐수 등(이하 오폐수로 총칭함)에 포함되어 있는 오염물질을 크게 침전, 폭기(생화학적처리), 여과, 소독 등의 과정을 통해 물과 분리하면서 정화 처리를 한다. In general, sewage treatment plants separate the pollutants contained in sewage, sewage, and waste water (hereinafter referred to as waste water) by sedimentation, aeration (biochemical treatment), filtration, and disinfection. do.

특히, 하수 처리 시 분리된 오염물질은 수분이 많은 고형물 형태로 존재하며, 이 고형물들은 농축조, 소화조, 탈수기, 건조기, 및 소각공정 등을 통과하면서 수분 감량과 유기물질 분해가 이루어지는데, 이러한 과정을 통상 슬러지 처리공정 또는 슬러지 감량화 공정이라 한다. In particular, contaminants separated during sewage treatment exist in the form of watery solids, and these solids pass through thickening tanks, digesters, dehydrators, dryers, and incineration processes to reduce moisture and decompose organic matters. Usually referred to as sludge treatment process or sludge reduction process.

즉, 슬러지 처리공정을 통해서 오폐수에 함유되어 있던 오염물질은 고농도의 유기물이나 오염물질로 농축된 수분이 많은 슬러지(오니)가 되며, 이 슬러지는 농 축조에 의하여 수분이 감소되고 혐기성 소화조에서 유기물질을 분해하여 안정화한 다음, 탈수하면서 수분을 제거하여 그 부피를 최소화한 후 건조하거나 소각하여 그 잔재물을 최종처분한다. In other words, the contaminants contained in the waste water through the sludge treatment process become high-density organic matter or watery sludge (sludge) concentrated with pollutants, and the sludge is reduced in moisture by the concentration of organic matter in the anaerobic digester. After decomposing and stabilizing, removing water while dehydration to minimize the volume, and then dried or incinerated to finally dispose of the residue.

그런데, 대다수의 종래 하수처리장에서 사용되는 협기성 소화조는 소화 처리할 수 있는 슬러지의 농도가 3~ 5%로 낮아 수분이 상당히 많기 때문에 추후 공정인 탈수기로 이 슬러지 및 하수가 유입되면 슬러지 케익의 탈수농도가 낮아서 그 발생량이 과다하게 증가되는 문제점이 있었다. However, the anaerobic digester used in most conventional sewage treatment plants has a low concentration of 3 to 5% of the sludge that can be digested, so that the amount of water is quite high. There was a problem that the concentration is excessively increased due to the low concentration.

또한, 종래의 하수처리장에서는 소화조에서 발생하는 월류수를 다시 슬러지 처리공정의 초기단계로 반송하게 되는데, 이때 이 반려수(월류수+탈수기의 여액)는 하수처리장으로 공급되는 유입수의 수질을 더욱 악화시키는 문제점이 있었다. 유입수의 수질이 악화되어 하수처리장에서 처리할 수 있는 설계 농도를 초과하게 되면 최종적으로 수처리된 오폐수의 수질도 기준치를 초과하기 때문에, 이는 결국 하수처리장의 용량을 늘리기 위해 시설을 증설해야 하는 등 상당한 비용이 추가 발생하는 문제점이 있었다. In addition, in the conventional sewage treatment plant, the overflowed water generated in the digester is returned to the initial stage of the sludge treatment process, where the companion water (overflow + dehydrator filtrate) further deteriorates the water quality of the influent supplied to the sewage treatment plant. There was this. If the influent water quality deteriorates and exceeds the design concentration that can be treated in the sewage treatment plant, the water quality of the finally treated waste water also exceeds the standard value, which is a significant cost such as the need to expand the facility to increase the capacity of the sewage treatment plant. There was a problem that occurred further.

본 발명은 상술한 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 하수처리장에서 처리되는 수질을 향상시킬 수 있도록 하수처리장의 반려수 및 슬러지를 저감시키는 방법을 제공하는 데 있다.The present invention is to solve the above problems, an object of the present invention to provide a method for reducing the companion water and sludge in the sewage treatment plant to improve the water quality treated in the sewage treatment plant.

상기 목적을 달성하기 위한 본 발명에 따른 하수처리장의 반려수 및 슬러지를 저감시키는 방법은 하수처리장으로 유입된 오폐수를 침전조와 폭기조와 농축조와 소화조와 탈수기를 통과시키면서 수질을 개선하되, 소화조와 탈수기 사이에 슬 러지 농축부재를 마련하여 소화조에서 발생되는 월류수와 슬러지를 전처리한다. The method for reducing the companion water and sludge of the sewage treatment plant according to the present invention for achieving the above object is to improve the water quality while passing the sewage treatment wastewater introduced into the sewage treatment plant through the sedimentation tank, aeration tank and the concentration tank, the digestion tank and the dehydrator, between the digester and the dehydrator Provide sludge thickening member to pretreat the overflow water and sludge generated in the digester.

또한, 본 발명에 따른 하수처리장의 반려수 및 슬러지를 저감시키는 방법에 있어서 슬러지 농축부재에서 발생한 여액은 침전조 측으로 반송되고, 슬러지는 탈수기로 유출된다. In addition, in the method for reducing companion water and sludge in the sewage treatment plant according to the present invention, the filtrate generated in the sludge thickening member is returned to the settling tank side, and the sludge is discharged to the dehydrator.

본 발명에 따른 하수처리장의 반려수 및 슬러지를 저감시키는 방법에 있어서 슬러지 농축부재는 벨트형 또는 드럼형 농축설비이다. In the method for reducing companion water and sludge in a sewage treatment plant according to the present invention, the sludge thickening member is a belt type or drum type thickening facility.

본 발명에 따른 하수처리장의 반려수 및 슬러지를 저감시키는 방법은 소화조의 하측에 슬러지 농축부재를 설치하여 소화조에서 발생하는 월류수를 없애고 슬러지를 효율적으로 농축시키기 때문에 탈수기로 유입되는 슬러지의 농도를 높여 고농도로 탈수되도록 함으로써 슬러지 양을 저감시키고, 농축부재에서 발생하는 여액을 다시 침사스크린으로 반송함으로써 하수처리장의 처리수질을 극대화할 수 있다. 또한, 탈수 효율의 증가로 인해 탈수기의 수를 줄일 수 있어 비용 절감 효과도 크다.In the method for reducing companion water and sludge in the sewage treatment plant according to the present invention, the sludge concentration member is installed at the lower side of the digester to remove the excess water generated in the digester and to efficiently concentrate the sludge, thereby increasing the concentration of sludge flowing into the dehydrator and increasing the concentration. By dehydration to reduce the amount of sludge, and by returning the filtrate generated in the concentrated member back to the settling screen can maximize the treated water quality of the sewage treatment plant. In addition, the number of dehydrators can be reduced due to the increase in the dehydration efficiency, and thus the cost reduction effect is also great.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 하수처리장의 슬러지 처리공정을 개략적으로 도시한 것으로서, 도면을 참조하면 하수처리장으로 유입되는 오폐수는 침사스크린(1), 1차침전조(2), 폭기조(3), 2차침전조(4), 농축조(5), 소화조(6), 슬러지 농축부재(7) 탈수기(8)를 통과하면서 수처리된다. 1 is a schematic view of a sludge treatment process of a sewage treatment plant according to the present invention. Referring to the drawings, waste water flowing into a sewage treatment plant is a sedimentation screen (1), a primary sedimentation tank (2), and an aeration tank (3). Water treatment is carried out while passing through the settling bath 4, the concentration tank 5, the digester 6, the sludge thickening member 7 and the dehydrator 8.

침사스크린(1)은 오폐수에 함유된 토사, 협잡물의 유입을 차단한다. The sedimentation screen (1) blocks the inflow of soil and contaminants contained in the waste water.

1차침전조(2)는 스크린(1)을 통과한 오폐수를 침전성 슬러지와 상등수로 분리한다. 분리된 상등수는 폭기조(3)로 유입되며, 침전조 바닥에 침전된 슬러지는 별도의 슬러지 이송라인(L1)을 통해 농축조(5)로 유입된다. The primary sedimentation tank 2 separates the wastewater passing through the screen 1 into sedimentary sludge and supernatant. The separated supernatant is introduced into the aeration tank (3), and the sludge deposited on the bottom of the sedimentation tank is introduced into the concentration tank (5) through a separate sludge transfer line (L1).

폭기조(3)는 1차침전조(2)의 상등수에 함유된 오염물질을 호기성 미생물을 이용하여 분해 제거한다. The aeration tank 3 decomposes and removes contaminants contained in the supernatant of the primary precipitation tank 2 using aerobic microorganisms.

2차침전조(4)는 폭기조(3)로부터의 유출수를 상등수와 활성슬러지(잉여슬러지와 반송슬러지)로 고액분리한다. The secondary sedimentation tank 4 separates the effluent from the aeration tank 3 into supernatant water and activated sludge (surplus sludge and conveying sludge).

농축조(5)는 침전조(1차 및 2차)에서 생성된 활성슬러지의 수분을 줄이고 고형물의 농도를 높여 슬러지의 부피를 줄인다. 슬러지의 수분함량이 높으면 단위고형물(건량의 고형물)에 비하여 슬러지의 부피가 커서 이송과 처리에 동력이 많이 소요되고 그 처리설비나 이송배관의 처리능력도 많이 요구된다. The thickener 5 reduces the volume of activated sludge produced in the settling tanks (primary and secondary) and increases the concentration of solids to reduce the volume of the sludge. When the water content of sludge is high, the volume of sludge is larger than unit solids (dry solids), which requires a lot of power for transportation and treatment, and also requires a lot of processing capacity of the treatment equipment or the piping.

소화조(6)는 고온(섭씨 약 55도) 또는 중온(섭씨 약 35도)에서 다량의 혐기성 미생물을 이용하여 슬러지를 분해하면서 안정화시킨다. 좀 더 구체적으로 설명하면, 소화조(6)의 내부에는 다량의 혐기성 미생물이 마련되어 있어서 새로 유입되는 슬러지의 유기물이 산발효를 통하여 유기산으로 변하면 이 유기산을 메탄가스와 탄산가스 등으로 분해하면서 증식한다. 소화조(6)에 유입된 슬러지의 농도는 5% 정도이며 소화반응(산발효 및 메탄발효)이 종결되면 농도가 약 3 ~ 5% 정도로 낮아진다. 소화 반응 중에 증가된 알카리도 및 중탄산염의 증가로 용해성과 유동성이 높아지고 소화조의 수위가 소화오니 저류조보다 높기 때문에 소화된 슬러지는 외부 배출이 용이하게 된다. 또한, 이때의 슬러지는 안정화되어 있기 때문에 악취가 감소하며 고형물 농도도 높아져 탈수하게 되면 수분 함유량이 낮은 슬러지 케익을 생산할 수 있을 뿐만 아니라 케익의 발생량도 감소시킬 수 있다. 이러한 과정에서 메탄, 이산화탄소등을 함유한 가스가 종전에 비하여 더 많이 발생되는데, 이 가스는 가연성(可燃性) 물질로서 발전이나 보일러의 에너지원으로 이용되고 있다. The digester 6 stabilizes the sludge by using a large amount of anaerobic microorganisms at high temperature (about 55 degrees Celsius) or medium temperature (about 35 degrees Celsius). In more detail, a large amount of anaerobic microorganisms are provided in the digester 6, and when organic matter of newly introduced sludge is converted into organic acid through acid fermentation, the organic acid is multiplied while being decomposed into methane gas and carbon dioxide gas. The concentration of sludge introduced into the digester 6 is about 5%, and when the digestion reaction (acid fermentation and methane fermentation) is terminated, the concentration is lowered to about 3 to 5%. Increased alkalinity and bicarbonate increased during the digestion reaction, so that the solubility and fluidity is increased and the digester sludge is higher than the reservoir and the digested sludge is easily discharged to the outside. In addition, since the sludge is stabilized at this time, the odor is reduced and the solid concentration is also increased to dehydrate the sludge cake with a low moisture content as well as can reduce the amount of cake generated. In this process, gas containing methane, carbon dioxide, etc. is generated more than before. This gas is a combustible material and is used as an energy source of power generation or a boiler.

도 1에 도시된 바와 같이 소화조(6)는 상부에 교반용 가스배관과 잉여가스를 배출하는 센터돔(6a)과, 소화조 내부의 수위를 유지하기 위한 월류구(6b)와, 농축 슬러지와 순환 슬러지가 투입되는 투입구(6c)와, 시료채취구, 환기구, 배관 등을 구비한다.As shown in Fig. 1, the digester 6 has a center dome 6a for discharging excess gas and a stirring gas pipe at the top, a overflow port 6b for maintaining a water level inside the digester, and a concentrated sludge and circulation. An inlet 6c into which sludge is introduced, a sample collection port, a ventilation port, a pipe, and the like are provided.

슬러지 농축부재(7)는 소화조(6)를 통과하면서 유기물질이 분해되어 안정화된 소화 슬러지를 탈수기(8)로 이송하기 전에 전처리로서 슬러지를 농축시킨다. 본 발명에 따라 소화조(6)의 하부에 슬러지 농축부재(7)을 설치하게 되면, 약 2.5% 농도의 소화 슬러지가 약 5% 정도로 농축되기 때문에 탈수 시 고농도로 탈수될 뿐만 아니라, 종래 소화조(6)에서 발생하여 다시 침사스크린(1)으로 반송되던 월류수(이하 유입수)를 없앨 수 있다. The sludge thickening member 7 concentrates the sludge as a pretreatment before passing the digestion sludge to the dehydrator 8 by decomposing and stabilizing the organic material through the digestion tank 6. When the sludge thickening member 7 is installed in the lower part of the digester 6 according to the present invention, since the digested sludge having a concentration of about 2.5% is concentrated about 5%, it is not only dehydrated at a high concentration during dehydration, but also a conventional digester 6 ) Can be eliminated excess water (hereinafter referred to as influent) that was returned to the sedimentation screen (1).

Figure 112008009561216-PAT00001
Figure 112008009561216-PAT00001

상기 표 1은 유입수(종래 소화조에서 발생되는 월류수 및 본 발명에 따라 슬러지 농축부재(7)에서 발생되는 여액)가 침사스크린(1)에 반송될 때의 농도를 각각 비교한 것이다. 여기서, BOD(생물학적 산소 요구량, mg/L)는 미생물이 오염물질을 분해하는데 필요한 산소량이며, SS(부유물질, mg/L)는 물속의 떠다니는 부유물질을 말하는 것으로 부유물질을 제거하면 부유물질에 붙어있는 오염물질까지 같이 제거되므로 BOD의 농도를 저하시킬 수 있다. T-N(총질소, mg/L)은 물속에 포함되어 있는 암모니아성 질소, 아질산성질소, 질산성질소의 양을 총칭하는 것이며, T-P(총인, mg/L)은 물속에 포함되어 있는 유기성 인 및 용존성 인의 양을 총칭하는 것이다. Table 1 compares the concentrations of the influent water (current flow from the conventional digester and the filtrate generated from the sludge thickening member 7 according to the present invention) is returned to the sedimentation screen (1). Here, BOD (biological oxygen demand, mg / L) is the amount of oxygen required for microorganisms to decompose contaminants, SS (floating matter, mg / L) refers to the floating suspended matter in the water, if the floating material is removed The contaminants attached to it are also removed, which can reduce the concentration of BOD. TN (total nitrogen, mg / L) is a general term for the amount of ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen contained in water, and TP (total phosphorus, mg / L) is organic phosphorus and dissolved in water. It is a general term for the amount of adults.

표 1에 도시한 바와 같이, 슬러지 농축부재(7)를 사용하여 월류수를 없애고 슬러지 농축부재(7)에서 발생되는 여액으로만 이루어진 유입수를 침전조 측 바람직하게는 침사스크린(1)으로 반송시키게 되면, 종래와 동일한 유량(780,000 m3/일)이더라도 BOD,SS,T-N,T-P 농도가 본 발명의 방법이 훨씬 낮기 때문에 수처리에 더욱 효과적임을 알 수 있다. 특히, 이러한 결과를 이용하면 하수처리장의 설계 농도가 140(mg/L)일 경우 종래 하수처리장에서는 처리가 불가능했던 오폐수라도 본원발명의 방법을 이용하면 많은 비용을 추가로 들이지 않고도 처리할 수 있게 된다.As shown in Table 1, when the sludge thickening member 7 is used to remove excess water and the influent consisting of the filtrate generated from the sludge thickening member 7 is returned to the settling tank side, preferably, the immersion screen 1, Even at the same flow rate (780,000 m 3 / day) as before, the BOD, SS, TN, and TP concentrations are much more effective for water treatment because the method of the present invention is much lower. In particular, using these results, if the design concentration of the sewage treatment plant is 140 (mg / L), even wastewater that has not been treated in the conventional sewage treatment plant can be treated without additional cost using the method of the present invention. .

Figure 112008009561216-PAT00002
Figure 112008009561216-PAT00002

표 2는 표 1의 산출 결과를 구체적으로 비교 나타낸 것으로 종래 슬러지 처리공정(소화조 월류수 부하량)과 본 발명에 따른 슬러지 처리공정(슬러지 농축부재(7)의 부하량)을 비교한 것이다. 본 발명은 동일한 유량(4000)을 처리함에도 불구하고 상기 표 1과 마찬가지로 BOD,SS,T-N,T-P 부하량과 발생된 여액의 BOD,SS,T-N,T-P 농도도 현저하게 낮음을 알 수 있다. Table 2 shows the comparison results of the calculation results in Table 1 specifically comparing the conventional sludge treatment process (digestion tank overflow water load) and the sludge treatment process (load amount of the sludge thickening member 7) according to the present invention. Although the present invention treats the same flow rate 4000, it can be seen that the BOD, SS, T-N, and T-P loads and BOD, SS, T-N, and T-P concentrations of the generated filtrate are remarkably low as in Table 1 above.

Figure 112008009561216-PAT00003
Figure 112008009561216-PAT00003

Figure 112008009561216-PAT00004
Figure 112008009561216-PAT00004

표 3 및 표 4는 종래 기술(개선전)과 본 발명(개선후)의 각 BOD 농도와 탈수할 슬러지양, 탈수기수, 케이크양을 나타낸 것으로 도시한 바와 같이 슬러지 농축부재(7)를 설치함으로써 농도와 탈수 효율이 현저하게 개선되었음을 알 수 있다.Table 3 and Table 4 show the respective BOD concentrations of the prior art (before improvement) and the present invention (after improvement), and the amount of sludge to be dehydrated, the number of dehydrator, and the amount of cake. It can be seen that the concentration and dehydration efficiency are significantly improved.

슬러지 농축부재(7)로서는 중력식 벨트 농축기, 로타리드럼형 농축기, 원심형 농축기 등이 모두 가능하나, 바람직하게는 전력 소비가 1 ~ 3kw 로 적은 중력식 벨트 또는 드럼 농축기가 가장 효율적이다. The sludge thickening member 7 may be a gravity belt concentrator, a rotary drum concentrator, a centrifugal concentrator, or the like, but preferably a gravity belt or drum concentrator having a low power consumption of 1 to 3 kW is most effective.

한편, 탈수기(8)는 슬러지 농축부재(7)에서 발생된 슬러지를 탈수시켜 케이크 상태로 만든다. 슬러지 농축부재(7)에서 농축된 슬러지의 농도는 약 5%로서 탈수 시 수분함유량이 75% 이하의 고농도로 탈수되기 때문에 슬러지 케익 발생량을 현저하게 감소시킬 수 있게 된다.On the other hand, the dehydrator 8 dehydrates the sludge generated in the sludge thickening member 7 into a cake state. The concentration of sludge concentrated in the sludge thickening member 7 is about 5%, and when the water is dehydrated, the sludge cake generation amount can be significantly reduced because the water content is dehydrated at a high concentration of 75% or less.

도 1은 본 발명에 따른 하수처리장의 반려수 및 슬러지를 저감시키는 방법을 도시한 도면이다. 1 is a view showing a method for reducing companion water and sludge in a sewage treatment plant according to the present invention.

*도면의 주요 참조부호에 대한 간단한 설명** Brief description of the main references in the drawings *

1..침사스크린 2,4..침전조1.Sedimentation screen 2,4.Sedimentation tank

3..폭기조 5..농축조3..aeration tank 5..concentration tank

6..소화조 7..슬러지 농축부재6..Septic tank 7..Sludge thickening member

8..탈수기8..Dehydrator

Claims (3)

하수처리장으로 유입된 오폐수를 침전조와 폭기조와 농축조와 소화조와 탈수기를 통과시키면서 수질을 개선하되,Improve the water quality by passing the wastewater introduced into the sewage treatment plant through the sedimentation tank, the aeration tank, the concentration tank, the digestion tank and the dehydrator, 상기 소화조와 탈수기 사이에 슬러지 농축부재를 마련하여, 소화조에서 발생되는 월류수와 슬러지를 전처리하는 것을 특징으로 하는 하수처리장의 반려수 및 슬러지를 저감시키는 방법.A sludge thickening member is provided between the digester and the dehydrator to pretreat the overflowed water and the sludge generated in the digester, thereby reducing companion water and sludge in the sewage treatment plant. 제 1항에 있어서,The method of claim 1, 상기 슬러지 농축부재에서 발생한 여액은 침전조 측으로 반송하고, 슬러지는 탈수기로 유출하는 것을 특징으로 하는 하수처리장의 반려수 및 슬러지를 저감시키는 방법.The filtrate generated in the sludge thickening member is returned to the settling tank side, the sludge is discharged to the dehydrator, the method for reducing the companion water and sludge of the sewage treatment plant. 제 1항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 슬러지 농축부재는 벨트형 또는 드럼형 농축설비인 것을 특징으로 하는 하수처리장의 반려수 및 슬러지를 저감시키는 방법.The sludge thickening member is a belt-type or drum-type thickening equipment, characterized in that for reducing the companion water and sludge of the sewage treatment plant.
KR1020080011847A 2008-02-05 2008-02-05 Method of reducing return water and sludge in sewage treatment plant KR20090085918A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101226035B1 (en) * 2012-07-11 2013-01-24 주식회사 그린기술산업 Pollutant loading reduction and high efficency of sludge-watering method and equipment for wastewater treatment system using a t-p sludge
KR101375343B1 (en) * 2012-04-06 2014-03-18 김응일 Waste for energy production system
KR101589671B1 (en) 2015-08-13 2016-01-28 주식회사 우리종합기술 Sewage sludge reduction system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101375343B1 (en) * 2012-04-06 2014-03-18 김응일 Waste for energy production system
KR101226035B1 (en) * 2012-07-11 2013-01-24 주식회사 그린기술산업 Pollutant loading reduction and high efficency of sludge-watering method and equipment for wastewater treatment system using a t-p sludge
KR101589671B1 (en) 2015-08-13 2016-01-28 주식회사 우리종합기술 Sewage sludge reduction system

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