KR100469641B1 - advanced wastwater treatment apparatus using a submerged type membrane - Google Patents
advanced wastwater treatment apparatus using a submerged type membrane Download PDFInfo
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- KR100469641B1 KR100469641B1 KR10-2002-0044568A KR20020044568A KR100469641B1 KR 100469641 B1 KR100469641 B1 KR 100469641B1 KR 20020044568 A KR20020044568 A KR 20020044568A KR 100469641 B1 KR100469641 B1 KR 100469641B1
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- tank
- membrane separation
- water
- immersed
- supplied
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- 239000012528 membrane Substances 0.000 title claims abstract description 114
- 238000000926 separation method Methods 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000010802 sludge Substances 0.000 claims abstract description 30
- 239000000126 substance Substances 0.000 claims abstract description 22
- 238000007654 immersion Methods 0.000 claims abstract description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 18
- 239000011574 phosphorus Substances 0.000 claims abstract description 18
- 230000006641 stabilisation Effects 0.000 claims abstract description 18
- 238000011105 stabilization Methods 0.000 claims abstract description 18
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000701 coagulant Substances 0.000 claims abstract description 10
- 238000001471 micro-filtration Methods 0.000 claims abstract description 7
- 238000005345 coagulation Methods 0.000 claims abstract 2
- 230000015271 coagulation Effects 0.000 claims abstract 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 16
- 239000002351 wastewater Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 239000000645 desinfectant Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 23
- 239000007787 solid Substances 0.000 description 17
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 239000000356 contaminant Substances 0.000 description 8
- 244000005700 microbiome Species 0.000 description 5
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 239000004912 1,5-cyclooctadiene Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
-
- 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
-
- 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
- C02F3/20—Activated sludge processes using diffusers
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
Abstract
본 발명은 원수를 침사조(1), 스크린조(2), 유량조정조(3), 미세여과스크린(13), 무산소조(5), 막분리호기조(6), 처리수조(7)를 순차적으로 거치면서 깨끗한 처리수로 처리하는 구성으로 되어 있으며, 또한, 상기 막분리호기조(6)에 침지된 분리막 유니트(14)에 의해 고액분리되어 상기 막분리호기조(6)에 남은 질산성질소성분 및 슬러지를 함유한 잔존물을 상기 막분리호기조(6)에 침지되어 있는 반송펌프(19)에 의해 공급받고, 그 공급된 잔존물이 소정 레벨 이상일 경우에 상기 무산소조(5)에 자연적으로 공급되는 안정화조(4)와; 슬러지를 상기 막분리호기조(6)에 침지되어 있는 반송펌프(19)에 의해 공급받는 슬러지농축저류조(8): 에어라인(A)을 경유하여, 상기 막분리호기조(5)에 침지된 분리막 유니트(14)의 하부에 배치되어 있는 산기장치에 공기를 공급하고 그리고 상기 슬러지농축저류조(8) 및 상기 처리수조(7)에 각각 공기를 공급하는 블로어(16); 그리고 인성분물질을 응집시켜 제거하기 위한 응집제를 저장하였다가 그 저장된 응집제를 이송펌프(18)에 의해 상기 막분리호기조(6)에 공급하는 약품저장탱크(17)를 포함하고 있다.In the present invention, the raw water is sequentially settled into the immersion tank (1), the screen tank (2), the flow rate adjustment tank (3), the microfiltration screen (13), the anoxic tank (5), the membrane separation tank (6), the treatment tank (7) It is configured to be treated with clean treated water while going through, and further solid-liquid separated by the membrane unit 14 immersed in the membrane separation tank (6) and the nitrate nitrogen components and sludge remaining in the membrane separation tank (6) Stabilization tank 4 which is supplied by the conveying pump 19 immersed in the membrane separation tank 6, and is naturally supplied to the oxygen-free tank (5) when the supplied residue is a predetermined level or more. )Wow; Sludge Concentration Storage Tank (8) supplied with a sludge from a conveying pump (19) immersed in the membrane separation tank (6): a membrane unit immersed in the membrane separation tank (5) via an air line (A) A blower (16) for supplying air to an air disperser arranged at the lower part of (14) and for supplying air to the sludge concentration storage tank (8) and the treatment water tank (7); And a chemical storage tank 17 which stores a coagulant for coagulation and removal of phosphorus substances and supplies the stored coagulant to the membrane separation tank 6 by a transfer pump 18.
Description
본 발명은 오폐수를 고효율로 처리할 수 있는 침지식 막분리 고도처리장치에 관한 것으로서, 보다 상세하게는 오폐수에 함유되어 있는 각종의 부유물질 및 유기물질과 더불어 부영양화(eutrophication)을 일으키는 영양물질인 질소와 인을 동시에 제거할 수 있는 침지식 막분리 고도처리장치에 관한 것이다.The present invention relates to an immersion type membrane separation advanced treatment apparatus capable of treating wastewater with high efficiency, and more specifically, nitrogen, which is a nutrient substance that causes eutrophication, together with various suspended substances and organic substances contained in wastewater. It relates to an immersion type membrane separation advanced processing apparatus capable of simultaneously removing wine.
종래의 침지식 막분리 활성슬러지 시스템에서는 하수나 폐수가 침전조, 스크린조, 유량조정조, 호기조, 막분리 호기조, 처리수조를 순서적으로 통과하여 처리되는 것으로 되어 있다. 이 침지식 막분리 활성슬러지 시스템은 오폐수의 부유물질(SS)과 유기오염물질(BOD, COD)의 제거에는 높은 효율을 나타내고 있다.In conventional submerged membrane separation activated sludge systems, sewage and waste water are treated in order through a sedimentation tank, a screen tank, a flow regulating tank, an aeration tank, a membrane separation aeration tank, and a treatment water tank. This submerged membrane separation activated sludge system shows high efficiency for the removal of suspended solids (SS) and organic pollutants (BOD, COD) from wastewater.
하지만, 오폐수에 함유되어 있는 질소 인에 대한 법규제가 점차적으로 강화됨에 따라 질소와 인에 대한 처리대책이 필요되고 있는 현실정에서, 종래의 침지식 막분리 활성슬러지 시스템은, 질소에 대하여 탈질에 의한 질소의 완전제거가 아닌질산화만을 일으켜 오히려 수중 미생물이 흡수하기에 좋은 형태로 변형시키며, 그리고 인에 대하여 미생물이 단지 미량만을 흡수하기 때문에, 질소와 인의 제거에는 한계가 있다고 하는 문제가 있다.However, as the legal regulations on nitrogen phosphorus in wastewater are gradually strengthened, the treatment measures for nitrogen and phosphorus are needed, and the conventional immersion membrane separation activated sludge system is based on nitrogen denitrification. Nitrogen oxidation, rather than complete removal of nitrogen, rather transforms it into a form that is good for absorption of microorganisms in water, and there is a problem that nitrogen and phosphorus removal are limited because microorganisms only absorb a small amount of phosphorus.
본 발명은 상기된 문제점을 해결하고자 안출된 것으로서, 오폐수내에 존재하는 부유물질 및 유기오염물질 뿐만 아니라 질소 및 인을 동시에 고효율로 제거할 수 있는 침지식 막분리 고도처리장치를 제공하는 것을 것을 목적으로 한다.The present invention has been made to solve the above problems, and an object of the present invention is to provide an immersion type membrane separation advanced processing apparatus capable of removing nitrogen and phosphorus as well as suspended solids and organic pollutants present in waste water at the same time. do.
도 1은 본 발명에 따른 침지식 막분리 고도처리장치를 도시하는 도면.1 is a view showing an immersion type membrane separation advanced processing apparatus according to the present invention.
본 발명은 상기 목적을 달성하기 위해, 피처리수로서 오폐수인 원수가 유입되는 침사조; 상기 침사조에 유입된 원수가 소정 레벨 이상일 경우에 상기 침사조의 원수를 자연적으로 공급받는 스크린조; 상기 스크린조보다 낮은 레벨에 위치되어 상기 스크린조에서 여과된 원수를 자연낙하에 의해 공급받는 유량조정조; 상기 유량조정조에 유입된 원수가 소정 레벨 이상일 경우에 상기 유량조정조의 원수를 상기 유량조정조 내에 침지되어 있는 원수펌프에 의해 미세여과스크린을 경유하여 공급받는 무산소조; 상기 무산소조에 공급된 원수가 소정 레벨 이상일 경우에 상기 무산소조의 원수를 자연적으로 공급받는 막분리호기조; 상기 막분리호기조에 침지된 분리막 유니트를 통하여 고액분리된 처리수를 흡인펌프에 의해 공급받아 방류펌프에 의해 방류하는 처리수조; 상기 막분리호기조에 침지된 상기 분리막 유니트에 의해 고액분리되어 상기 막분리호기조에 남은 질산성질소성분 및 슬러지를 함유한 잔존물을 상기 막분리호기조에 침지되어 있는 반송펌프에 의해 공급받고, 그 공급된 잔존물이 소정 레벨 이상일 경우에 상기 무산소조에 자연적으로 공급되는 안정화조; 상기 막분리호기조에 침지된 상기 분리막 유니트에 의해 고액분리되어 상기 막분리호기조에 남은 슬러지를 함유한 잔존물을 상기 막분리호기조에 침지되어 있는 반송펌프에 의해 공급받는 슬러지농축저류조; 에어라인을 경유하여, 상기 막분리호기조에 침지된 분리막 유니트의 하부에 배치되어 있는 산기장치에 공기를 공급하고 그리고 상기 슬러지농축저류조 및 상기 처리수조에 각각 공기를 공급하는 블로어; 그리고 인성분물질을 응집시켜 제거하기 위한 응집제를 저장하였다가 그 저장된 응집제를 이송펌프에 의해 상기 막분리호기조에 공급하는 약품저장탱크를 포함하고 있으며, 상기 처리수조에 유입된 처리수를 중수로 이용하고자 할 때에는, 상기 처리수를 소독제와 혼합하여 소독처리한 다음 방류시키기 위해, 상기 처리수조는 별도의 중수설비(소독설비, 펌프)를 구비하는 것으로 되어 있다.The present invention, to achieve the above object, the sedimentation tank which is introduced into the raw water which is waste water as treated water; A screen tank that naturally receives the raw water of the settling tank when the raw water flowing into the settling tank is above a predetermined level; A flow rate adjusting tank positioned at a lower level than the screen tank and receiving raw water filtered by the screen tank by natural falling; An oxygen-free tank receiving raw water of the flow adjusting tank via a microfiltration screen by a raw water pump immersed in the flow adjusting tank when the raw water introduced into the flow adjusting tank is equal to or higher than a predetermined level; A membrane separation tank which naturally receives raw water of the anoxic tank when the raw water supplied to the anoxic tank is above a predetermined level; A treatment tank for receiving the treated water separated by the liquid-liquid through the separation membrane unit immersed in the membrane separation tank to be discharged by the discharge pump; Residual solids separated by the membrane unit immersed in the membrane separation tank and the residue containing the nitrate nitrogen components and sludge remaining in the membrane separation tank are supplied by a transfer pump immersed in the membrane separation tank, Stabilization tank which is naturally supplied to the anoxic tank when the residue is above a predetermined level; A sludge concentrate storage tank which is solid-liquid separated by the membrane unit immersed in the membrane separation tank, and the residue containing sludge remaining in the membrane separation tank is supplied by a conveying pump immersed in the membrane separation tank; A blower for supplying air to an air diffuser disposed at a lower portion of the separation membrane unit immersed in the membrane separation tank, and to supply air to the sludge concentration storage tank and the treatment tank, respectively, via an air line; And a chemical storage tank storing the coagulant for coagulating and removing the phosphorus substance and supplying the stored coagulant to the membrane separation tank by a transfer pump, and using the treated water introduced into the treatment tank as heavy water. When the treated water is mixed with a disinfectant to disinfect and then discharged, the treated water tank is provided with a separate heavy water facility (disinfection facility, pump).
이하, 본 발명에 따른 침지식 막분리 고도처리장치에 관하여 도 1을 참조하여 설명하면, 다음과 같다.Hereinafter, the immersion type membrane separation advanced processing apparatus according to the present invention will be described with reference to FIG. 1.
본 침지식 막분리 고도처리장치는, 도 1에 도시된 바와 같이, 전체적으로 침사조(1), 스크린조(2), 유량조정조(3), 안정화조(4), 무산소조(5), 막분리호기조(6), 처리수조(7), 슬러지농축저류조(8), 약품저장탱크(17), 블로어(16), 미세여과 스크린(13), 산기장치를 하부에 구비한 분리막 유니트(14) 등을 포함하고 있다.This immersion type membrane separation advanced processing apparatus, as shown in Figure 1, the overall settling tank (1), screen tank (2), flow rate adjustment tank (3), stabilization tank (4), anoxic tank (5), membrane separation Exhalation tank (6), treatment tank (7), sludge concentration storage tank (8), chemical storage tank (17), blower (16), microfiltration screen (13), membrane unit (14) equipped with an acid device underneath It includes.
상기 침사조(1)는 피처리수로서 오폐수인 원수가 유입된다. 상기 침사조(1)에 유입된 원수가 소정 레벨 이상일 경우에, 상기 스크린조(2)는 상기 침사조의 원수를 자연적으로 공급받는다.The sedimentation tank 1 introduces raw water, which is waste water, as the water to be treated. When the raw water introduced into the immersion tank 1 is a predetermined level or more, the screen tank 2 is naturally supplied with the raw water of the immersion tank.
상기 유량조정조(3)는 상기 스크린조(2)보다 낮은 레벨에 위치되어 상기 스크린조(2)에서 여과된 원수를 자연낙하에 의해 공급받는다.The flow rate adjusting tank 3 is located at a lower level than the screen tank 2 to receive the raw water filtered by the screen tank 2 by natural drops.
상기 무산소조(5)는, 상기 유량조정조(3)에 유입된 원수가 소정 레벨 이상일 경우에, 상기 유량조정조(3)의 원수를 상기 유량조정조(3) 내에 침지되어 있는 원수펌프(11)에 의해 미세여과스크린(13)을 경유하여 공급받는다.The oxygen-free tank 5 is provided by the raw water pump 11 in which the raw water of the flow regulating tank 3 is immersed in the flow regulating tank 3 when the raw water flowing into the flow regulating tank 3 is equal to or higher than a predetermined level. It is supplied via the microfiltration screen 13.
상기 막분리호기조(6)는, 상기 무산소조(5)에 유입된 원수가 소정 레벨 이상일 경우에, 상기 무산소조(5)의 원수를 자연적으로 공급받는다.When the raw water introduced into the anoxic tank 5 is above a predetermined level, the membrane separation tank 6 receives the raw water of the anoxic tank 5 naturally.
상기 처리수조(7)는 상기 막분리호기조(6)에 침지된 분리막 유니트(14)를 통하여 고액분리된 처리수를 흡인펌프(15)에 의해 공급받아 상기 처리수조(7)에 침지되어 있는 방류펌프(20)에 의해 외부로 방류한다. 상기 처리수조(7)에 유입된 처리수를 중수로 이용하고자 할 때에는, 상기 처리수조(7)는 별도의 중수설비(소독설비, 펌프 등)를 구비하고서 상기 처리수를 소독제와 혼합하여 소독처리한 다음 상기 방류펌프(20)에 의해 외부로 방류할 수 도 있다.The treatment tank 7 receives the treated water separated by the liquid pump through the separation membrane unit 14 immersed in the membrane separation tank (6) by the suction pump 15 to discharge the immersion in the treatment tank (7) It is discharged to the outside by the pump 20. In order to use the treated water introduced into the treated water tank 7 as heavy water, the treated water tank 7 is provided with a separate heavy water facility (disinfection facility, pump, etc.), and the treated water is mixed with a disinfectant to disinfect. Next may be discharged to the outside by the discharge pump (20).
상기 안정화조(4)는 상기 막분리호기조(6)에 침지된 상기 분리막 유니트(14)에 의해 고액분리되어 상기 막분리호기조(6)에 남은 질산성질소성분 및 슬러지를 함유한 잔존물을 상기 막분리호기조(6)에 침지되어 있는 반송펌프(19)에 의해 공급받고, 그리고 그 공급된 잔존물이 소정 레벨 이상일 경우에 상기 무산소조(5)에 자연적으로 공급되게 된다.The stabilization tank 4 is solid-liquid separated by the separation membrane unit 14 immersed in the membrane separation tank 6, and the membrane containing residues containing nitrate nitrogen components and sludge remaining in the membrane separation tank 6 is added to the membrane. It is supplied by the conveying pump 19 which is immersed in the separation tank 6, and is naturally supplied to the anoxic tank 5 when the supplied residue is more than a predetermined level.
상기 슬러지농축저류조(8)는, 상기 막분리호기조(6) 내의 MLSS 농도가 높을 시에는, 상기 막분리호기조(6)에 침지된 상기 분리막 유니트(14)에 의해 고액분리되어 상기 막분리호기조(6)에 남은 슬러지를 함유한 잔존물을 상기막분리호기조(6)에 침지되어 있는 반송펌프(19)에 의해 공급받는다.The sludge concentrate storage tank 8 is solid-liquid separated by the membrane unit 14 immersed in the membrane separation tank 6 when the MLSS concentration in the membrane separation tank 6 is high. The residue containing the sludge left in 6) is supplied by the conveying pump 19 immersed in the membrane separation tank 6.
상기 블로어(16)는 에어라인(A)을 통해 상기 막분리호기조(5)에 침지된 분리막 유니트(14)의 하부에 배치되어 있는 산기장치에 공기를 공급하고, 그리고 상기 슬러지농축저류조(8) 및 상기 처리수조(7)에 각각 공기를 공급한다.The blower 16 supplies air to an air dispersing device disposed below the membrane unit 14 immersed in the membrane separation tank 5 through an air line A, and the sludge concentration storage tank 8. And supply air to the treatment tank (7), respectively.
상기 약품저장탱크(17)는 응집제를 저장하였다가 그 저장된 응집제를 이송펌프(18)에 의해 상기 막분리호기조(6)에 공급한다.The chemical storage tank 17 stores the coagulant and supplies the stored coagulant to the membrane separation tank 6 by a transfer pump 18.
여기에서, 상기 스크린조(2) 내에는, 조대협잡물을 제거하기 위해, 고정 바아 스크린(9)과 자동 바아 스크린(10)이 순차적으로 배치되어 구비되어 있다.Here, in the screen tank 2, the fixed bar screen 9 and the automatic bar screen 10 are disposed in order to remove coarse contaminants.
또한, 상기 유량조정조(3), 안정화조(4) 및 무산소조(5) 각각에는 수류교반기(12)가 각각 배치되어 있다.In addition, a water flow stirrer 12 is disposed in each of the flow rate adjustment tank 3, the stabilization tank 4, and the oxygen-free tank 5.
상기 안정화조(4) 및 상기 유량조정조(3) 각각에 구비된 수류교반기(12)는 상기 안정화조(4) 및 상기 유량조정조(3) 내의 슬러지의 침전 및 농축이 발생되는 것을 방지하기 위함이고, 그리고 상기 무산소조(5)에 구비된 수류교반기(12)는 유입 원수와 막분리호기조(6)의 반송수를 적절히 혼합, 탈질화를 원활히 일으키기 위함이다.The water stirrer 12 provided in each of the stabilization tank 4 and the flow regulating tank 3 is to prevent the precipitation and concentration of sludge in the stabilization tank 4 and the flow regulating tank 3 to occur. And, the water stirrer 12 provided in the oxygen-free tank (5) is to properly mix the incoming raw water and the return water of the membrane separation tank (6), to smoothly denitrification.
상기와 같이 구성된 본 발명의 침지식 막분리 고도처리장치의 작동에 대해서 설명하면 다음과 같다.Referring to the operation of the immersion type membrane separation advanced processing apparatus of the present invention configured as described above are as follows.
먼저, 본 시스템에 유입되는 오폐수인 원수는 침사조(1)를 거쳐 모래나 석질(石質) 등의 비중이 높은 협잡물이 제거된 후, 스크린조(2)를 겨쳐 조대협잡물이 제거되고(예를 들면, 스크린조(2)의 고정 바아 스크린(9)과 자동바아스크린(10)을 거쳐 조대협잡물이 제거되고), 유량조정조(3)로 유입된다.First, the raw water, which is the wastewater flowing into the system, is removed through the sedimentation tank 1, and the contaminants having a high specific gravity such as sand or stone are removed, and then the coarse contaminants are removed through the screen tank 2 (eg For example, the coarse contaminant is removed through the fixed bar screen 9 and the automatic bar screen 10 of the screen tank 2, and flows into the flow rate adjusting tank 3.
상기 유량조정조(3)는 일정량의 원수를 무산소조(5)에 공급하는 작용을 하며, 내부에 설치된 레벨스위치가 원수의 일정 수면을 감지하여 원수펌프(11)를 작동시켜 무산소조(5)에 그 원수를 이송시킨다.The flow rate adjustment tank (3) serves to supply a predetermined amount of raw water to the oxygen-free tank (5), the level switch installed inside detects a certain surface of the raw water to operate the raw water pump 11 to the raw water in the oxygen-free tank (5) Transfer it.
이 무산소조(5)로 이송되기 전에 원수는 미세여과 스크린(13)에 의해 다시 한번 여과처리된다. 상기 미세여과 스크린(13)은 미세한 메시 스크린을 원통형으로 만든 것으로서, 모터의 구동에 의해 회전됨으로써 미세협잡물을 제거한다.The raw water is once again filtered by the microfiltration screen 13 before being transferred to this oxygen-free tank 5. The microfiltration screen 13 is made of a cylindrical mesh screen in a cylindrical shape, and is rotated by the driving of a motor to remove fine contaminants.
상기 무산소조(5)로 이송된 원수는, 상류측에 바로 인접하여 배치되어 일정 레벨 이상이 되면 상기 무산조로(5)에 자연적으로 이송되는 안정화조(4)에서 유입되는 반송액과 혼합되게 된다.The raw water transported to the oxygen-free tank 5 is disposed immediately adjacent to the upstream side and mixed with the conveyed liquid flowing from the stabilization tank 4 which is naturally transported to the anaerobic furnace 5 when it is above a predetermined level.
이 때, 안정화조(4)는, 막분리호기조(6)내에 존재하는 질산성질소를 무산소조에서 탈질화하기 위해, 막분리호기조(6) 내로부터 반송된 혼합액에 용존되어 있는 과량의 유리산소(O2)를 없애고, 그리고 상기 무산소조(5) 내의 MLSS(mixed liquor suspended solids) 농도를 유지시키는 역할을 하는 데, 질산성질소 성분 및 슬러지를 함유한 막분리호기조 혼합액이 반송펌프(19)를 통해 막분리호기조(6) 상류의 안정화조(4)로 반송된다.At this time, the stabilization tank 4 is used to remove excess free oxygen dissolved in the mixed liquid conveyed from the membrane separation tank 6 in order to denitrify the nitrate nitrogen present in the membrane separation tank 6 in the anoxic tank. O 2 ) and to maintain the concentration of mixed liquor suspended solids (MLSS) in the oxygen-free tank (5), the membrane-separated aerobic liquid mixture containing nitrogen nitrate and sludge is passed through the return pump (19) It is conveyed to the stabilization tank 4 upstream of the membrane separation tank 6.
상기 안정화조(4)에 반송된 혼합액은 안정화조(4) 내에서 유리산소가 제거된 상태로 무산소조(5)에 자연적으로 유입된다.The mixed liquid returned to the stabilization tank 4 naturally flows into the anoxic tank 5 in the state in which free oxygen is removed in the stabilization tank 4.
안정화조(4) 내의 슬러지의 침전 및 농축이 발생되는 것을 방지하기 위해 침지된 수류교반기(12)가 안정화조(4)에 설치된다.In order to prevent sedimentation and concentration of sludge in the stabilization tank 4 from occurring, an immersed water stirrer 12 is installed in the stabilization tank 4.
상기 무산소조(5)에서는 탈질반응에 의해 질소성 물질이 제거된다. 이는 막분리호기조(6)에서 반송되는 반송수에는 폭기에 의해 질산성 질소로 변형된 질소성분이 다량함유되어 있는 데, 이 질산성 질소가 유리산소가 존재하지 않은 무산소조(5)에 유입되면서 무산소조(5)내의 탈질 미생물에 의해 결합산소와 분리됨으로써 질소가스(N2)로 전환되어 대기중으로 방출되기 때문이다.In the oxygen-free tank 5, the nitrogenous substance is removed by denitrification. This is because the return water conveyed from the membrane separation tank 6 contains a large amount of nitrogen, which is transformed into nitrate nitrogen by aeration, and the nitrate nitrogen enters the anoxic tank 5 in which free oxygen does not exist. This is because it is separated from the bound oxygen by the denitrifying microorganism in (5), where it is converted into nitrogen gas (N 2 ) and released into the atmosphere.
이 때, 탈질 미생물이 활동하는데 필요한 유기탄소원은 유입 원수내의 유기물질에서 충당하게 된다. 유입 원수와 막분리호기조(6) 반송수를 적절히 혼합, 탈질화를 원활히 일으키기 위해, 무산소조(5) 내에 수류교반기(12)를 설치하여 원수와 반송액을 혼합시킨다.At this time, the organic carbon source required for the denitrification microorganisms to be taken up from the organic material in the influent raw water. In order to properly mix the incoming raw water and the return water to the membrane separation tank 6 and smoothly denitrification, a water stirrer 12 is provided in the anoxic tank 5 to mix the raw water and the return liquid.
상기 무산소조(5)에서 탈질화된 혼합액은 막분리호기조(6)에 이송되게 된다. 막분리호기조(6)에 유입된 혼합액에는 유기오염물질과 인성분물질, 부유물질, 암모니아성질소(NH3-N), 아질산성질소(NO2-N)성분이 존재한다.The mixed liquid denitrified in the oxygen-free tank 5 is transferred to the membrane separation tank 6. Organic contaminants, phosphorus substances, suspended solids, ammonia nitrogen (NH 3 -N) and nitrous nitrogen (NO 2 -N) are present in the mixed solution introduced into the membrane separation tank (6).
막분리호기조(6) 내에는 운전조건에 맞는 농도의 MLSS(mixed liquor suspended solids: 미생물; 5000 내지 12000mg/ℓ)가 존재하는 데, 유기오염물질이 MLSS의 기질(substrate)로서 소비 제거된다.In the membrane separation tank 6, MLSS (mixed liquor suspended solids: microorganisms; 5000 to 12000 mg / l) of a concentration suitable for operating conditions is present, and organic contaminants are consumed and removed as a substrate of MLSS.
또한, 막분리호기조(6)에 유입된 암모니아성질소(NH3-N)와 아질산성질소(NO2-N)성분은 막분리호기조(6) 내에 호기성 상태에서 질산화 과정을거쳐 질산성질소(NO3-N)성분으로 전환된다.In addition, the ammonia nitrogen (NH 3 -N) and nitrous nitrogen (NO 2 -N) components introduced into the membrane separation tank (6) undergoes nitrification in an aerobic state in the membrane separation tank (6). NO 3 -N) component.
인성분 물질은, 대체로 PO4 3-의 형태로 존재하는 데, 음전하를 띄고 있는 특성을 이용하여, 막분리호기조 외부에 존재하는 약물저장탱크(17)로부터 응집제(예를 들면, 양전하를 띄고 있는 응집제)를 주입하여, 인성분물질을 응집 제거하게 된다. 유기오염물질과 인성분물질이 제거되면 막분리호기조(6) 내엔 결국 부유물질(SS)과 MLSS 그리고 응집된 인성분물질과 같은 고형물만이 존재하게 되는 데, 이는 분리막 유니트(14)에 의해 고액분리되게 된다.Phosphorus material, having substantially the form of PO 4 3-, using the characteristic that comes in a negative charge, the membrane separation aerobic tank, for a coagulant (such as a drug from a storage tank 17, which is external, which comes in a positive charge A coagulant) to coagulate and remove the phosphorus substance. When the organic pollutants and phosphorus substances are removed, only the solids such as suspended solids (SS), MLSS, and aggregated phosphorus substances exist in the membrane separation tank 6, which is solidified by the membrane unit 14. Will be separated.
이 분리막 유니트(14)는 공지의 분리막 프레임 장치에 결합된 상태에서 고액분리 수행이 가능한데, 이 분리막프레임장치는 막분리호기조 외부에 존재하는 흡인펌프(15)와 흡인라인으로 연결되어 있다. 이 흡인펌프(15)의 가동으로 발생되는 흡입압에 의해 분리막 외부의 혼합액이 분리막 공극을 통해 분리막 내부로 유입되면서 고액분리가 발생, 결국 깨끗한 처리수가 유출되게 된다.The membrane unit 14 is capable of performing solid-liquid separation in a state of being coupled to a known membrane frame device, which is connected to a suction pump 15 existing outside the membrane separation tank by a suction line. Due to the suction pressure generated by the operation of the suction pump 15, the mixed liquid outside the separation membrane flows into the separation membrane through the separation membrane pores, whereby solid-liquid separation occurs, resulting in clean treated water flowing out.
분리막 표면에 발생하는 폐색을 지연, 가동 시간을 연장시키기 위해, 분리막프레임장치 하단에 산기장치(공지되어 있어 도시생략됨)를 설치한다. 이 산기장치는 막분리호기조(6) 외부에 존재하는 블로어(16)와 에어라인(A)을 통해 연결되어 있고, 블로어(16)의 가동을 통해 공기를 막분리호기조(6) 내부에 공급하게 된다. 이 공기에 의해 막분리호기조(6) 내 수류가 형성되어 분리막 표면의 폐색이 지연됨으로써 침지식 막분리 고도처리시설이 장기간 원활히 가동되게 된다.In order to delay the blockage occurring on the membrane surface and prolong the operation time, an air diffuser (not shown and not shown) is installed at the bottom of the membrane frame device. The air diffuser is connected to the blower 16 outside the membrane separation tank 6 through the air line A, and the air is supplied to the inside of the membrane separation tank 6 through the operation of the blower 16. do. This air forms a flow of water in the membrane separation tank 6 and delays the blockage of the membrane surface, so that the immersion type membrane separation advanced processing facility operates smoothly for a long time.
침지식 막분리 고도처리시설을 장기간 운영하는 동안 막분리호기조(6) 내의MLSS농도와 SS, 응집된 인성분물질이 계속적으로 증가하게 된다. 막분리호기조(6)내 적절한 MLSS 농도를 유지하고 SS와 응집된 인성분물질을 제거하기 위해, 막분리호기조(6)내 슬러지(MLSS와 SS, 응집된 인성분물질이 합쳐진 물질)를 간헐적으로 슬러지농축저류조(8)에 이송시킨다.During the long-term operation of the immersion type membrane separation treatment facility, the MLSS concentration, SS, and aggregated phosphorus substances in the membrane separation tank 6 continue to increase. In order to maintain an appropriate MLSS concentration in the membrane separation tank 6 and to remove the phosphorus substances aggregated with the SS, sludge (MLSS and SS, the aggregated aggregated phosphorus substance) in the membrane separation vessel 6 is intermittently. The sludge concentrate storage tank (8) is transferred.
막분리호기조(6)내 질산성질소성분 및 슬러지는 평상시에는 안정화조(4)에 반송펌프(19)에 의해 반송되고, 막분리호기조(6)내 MLSS 농도가 매우 높은 경우엔, 막분리호기조(6) 내의 슬러지는 슬러지농축저류조(8)에 이송되어 MLSS농도를 조절한다.The nitrate nitrogen component and sludge in the membrane separation tank 6 are normally conveyed to the stabilization tank 4 by the conveying pump 19, and when the concentration of MLSS in the membrane separation tank 6 is very high, the membrane separation tank The sludge in (6) is transferred to the sludge concentration storage tank (8) to adjust the MLSS concentration.
슬러지농축저류조(8)내에는 슬러지의 고착화를 방지하기 위해 블로어(16)와 연결된 에어라인(A)을 설치한다.An air line A connected to the blower 16 is installed in the sludge concentration storage tank 8 to prevent the sludge from sticking.
분리막프레임장치로부터 고액분리된 처리수는 흡인펌프(15)에 의해 막분리호기조(6)의 하류의 처리수조(7)에 이송되어 방류펌프(20)에 의해 외부로 방류된다. 이 처리수를 중수로 재이용하고자 할 시에는 별도의 중수설비(소독설비, 펌프 등)를 갖추어 이 처리수를 소독처리하여 재이용할 수도 있다.The treated water separated from the separation membrane frame device is transferred to the treatment water tank 7 downstream of the membrane separation tank 6 by the suction pump 15 and discharged to the outside by the discharge pump 20. If the treated water is to be reused as heavy water, a separate heavy water facility (disinfection facility, pump, etc.) may be provided to disinfect and treat the treated water.
본 발명의 침지식 막분리 고도처리장치는 호기조와 막분리호기조에서 오폐수에 함유된 유기오염물질(BOD, COD)과 부유물질(SS)만을 제거할 수 있는 기존의 시스템에 비하여, 상기와 같이 구성된 침지식 막분리 고도처리장치는 막분리호기조 상류에 무산소조를 배치시켜 안정화조에서 유입되는 오폐수에 함유된 질산성질소성분을 탈질화시켜 제거함과 동시에, 막분리호기조와 별도로 연결된 약품저장탱크에서 응집제를 공급하여 막분리호기조 내의 오폐수에 함유된 인성분물질을 응집시켜 제거할 수 있게 되었다.The submerged membrane separation advanced processing apparatus of the present invention is configured as described above, compared to the existing system capable of removing only organic pollutants (BOD, COD) and suspended solids (SS) contained in the waste water in the aerobic and membrane separation aeration tank. The immersion type membrane separation advanced treatment device arranges an anoxic tank upstream of the membrane separation tank to denitrify and remove the nitrate nitrogen components contained in the wastewater from the stabilization tank, and simultaneously removes flocculant from the chemical storage tank connected to the membrane separation tank. By supplying, it was possible to aggregate and remove the phosphorus substances contained in the waste water in the membrane separation tank.
또한, 본 발명의 침지식 막분리 고도처리장치는 막분리호기조 내에 존재하는 MLSS에 의해 오폐수에 함유된 유기오염물질(BOD, COD)을 제거함과 동시에 최종적으로 분리막에 의해 오폐수에 함유된 부유물질, MLSS, 응집된 인성분물질의 고액분리를 수행하여 깨끗한 처리수를 생성할 수 있게 되었다.In addition, the immersion type membrane separation advanced treatment apparatus of the present invention removes organic pollutants (BOD, COD) contained in the waste water by MLSS present in the membrane separation tank and at the same time, suspended solids contained in the waste water by the membrane, MLSS, solid-liquid separation of agglomerated phosphorus substances can be performed to produce clean treated water.
따라서, 간단하게 구성되는 본 발명의 침지식 막분리 고도처리장치는 오폐수에 함유된 BOD, COD, SS, 질소, 인과 같은 오염물질을 동시에 고효율로 제거할 수 있는 효과를 가지고 있다.Therefore, the immersion membrane separation treatment apparatus of the present invention, which is simply configured, has the effect of simultaneously removing high-efficiency contaminants such as BOD, COD, SS, nitrogen, and phosphorus contained in waste water.
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