KR100720281B1 - Molasses fermenter for advanced sewage and wastewater treatment - Google Patents
Molasses fermenter for advanced sewage and wastewater treatment Download PDFInfo
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- KR100720281B1 KR100720281B1 KR1020010043051A KR20010043051A KR100720281B1 KR 100720281 B1 KR100720281 B1 KR 100720281B1 KR 1020010043051 A KR1020010043051 A KR 1020010043051A KR 20010043051 A KR20010043051 A KR 20010043051A KR 100720281 B1 KR100720281 B1 KR 100720281B1
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- 235000013379 molasses Nutrition 0.000 title claims abstract description 48
- 239000010865 sewage Substances 0.000 title claims abstract description 10
- 238000004065 wastewater treatment Methods 0.000 title claims 2
- 238000000855 fermentation Methods 0.000 claims abstract description 28
- 230000004151 fermentation Effects 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 15
- 239000010802 sludge Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 6
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 244000005700 microbiome Species 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 239000011368 organic material Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229920001397 Poly-beta-hydroxybutyrate Polymers 0.000 description 2
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- -1 C 2 Chemical class 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical group [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (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)
Abstract
본 발명은 당밀발효장치를 이용한 고도 하폐수 처리장치에 관한 것으로, 그 목적은 하폐수처리시 외부탄소원으로 사용하는 유입수에 함유된 질소와 인을 처리하는 장치를 제공하는데 있다.The present invention relates to an advanced sewage treatment apparatus using molasses fermentation apparatus, and an object thereof is to provide an apparatus for treating nitrogen and phosphorus contained in influent water used as an external carbon source during sewage treatment.
본 발명의 구성은 통상의 하폐수의 질소, 인 제거장치에 있어서, 질산화조(4) 다음 단에 무산소조(3') 및 질산화조(4')를 추가로 더 포함시켜 구성하고, 외부탄소원으로써 당밀을 주입하도록 당밀을 발효시키는 당밀발효장치(11)를 구성하여 발효주입펌프(12, 12')를 사용하여, 혐기조(2) 및 무산소조(3)로 투입하도록 유로를 구성하고, 1차 침전지(1)를 거친 유입 원수를 혐기조(2)와 무산소조(3, 3')에 분할 주입하도록 유로를 구성하고, 상기 질산화조(4, 4')에서의 질산화 효율에 따라 무산소조(3)로 반송하는 내부반송 유로를 게이트 밸브(10, 10')로 변경하는 병렬식 내부반송 유로를 형성시킨 구성을 특징으로 한다.The structure of the present invention is configured to further include an anoxic tank (3 ') and a nitrification tank (4') at the stage next to the nitrification tank (4) in the conventional wastewater waste nitrogen and phosphorus removal device, and molasses as an external carbon source. A molasses fermentation apparatus 11 for fermenting molasses to inject the molasses and using the fermentation injection pumps 12 and 12 ', the flow passage is configured to be introduced into the anaerobic tank 2 and the anaerobic tank 3, the primary sedimentation basin ( The flow path is configured to separately inject the raw water passed through 1) into the anaerobic tank 2 and the anoxic tanks 3 and 3 ', and is returned to the anoxic tank 3 according to the nitrification efficiency in the nitrification tanks 4 and 4'. A configuration in which a parallel internal transfer flow path for changing the internal transfer flow path to the gate valves 10 and 10 'is formed.
당밀, 하폐수처리, 침전지, 방류수, 발효장치Molasses, sewage treatment, sedimentation basin, effluent, fermentation system
Description
도 1은 기존 고도처리 장치 공정도이고, 1 is a conventional high processing apparatus process diagram,
도 2는 본 발명의 장치 공정도이며, 2 is a device process diagram of the present invention,
도 3은 본 발명에 있어 발효장치의 상세도이다. Figure 3 is a detailed view of the fermentation apparatus in the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
(1) : 1차 침전지 (2) : 혐기조(1): primary settling basin (2): anaerobic tank
(3, 3') : 무산소조 (4, 4') : 질산화조 (3, 3 '): anoxic tank (4, 4'): nitrifier
(5) : 2차 침전지 (6) : 외부반송 배관 및 펌프(5): Secondary settling basin (6): External conveying pipe and pump
(7) : 슬러지 폐기배관 및 펌프 (8) : 내부반송 배관 및 펌프 (7): Sludge waste pipe and pump (8): Internal conveying pipe and pump
(9) : 방류수 (10, 10') : 게이트 밸브 (9): effluent (10, 10 '): gate valve
(11) : 당밀 발효장치 (12, 12') : 발효액 주입펌프 (11): molasses fermentation system (12, 12 '): fermentation broth injection pump
(13) : 당밀 저장조 (14) : 스크류 피더(screw feeder)(13) molasses storage tank (14): screw feeder (screw feeder)
(15) : 배관내 가열장치 (16) : 배관내 혼합장치 (15): heating device in pipe (16): mixing device in pipe
(17) : 희석수 (18) : 발효조 (17): dilution water (18): fermenter
(19) : 가온장치 (20) : 발효액 저장조 (19): heating device (20): fermentation broth storage tank
본 발명은 당밀발효장치를 이용한 고도 하폐수 처리장치에 관한 것으로, 자세하게는 하수나 폐수 중에 함유되어 호수나 하천 등으로 유입될 경우, 부영양화나 상수원 오염으로 이어지는 제한요인 물질인 질소, 인을 효과적으로 제거하기 위한 고도처리 분야로, 이는 미생물의 물질대사를 이용하여 수중에 존재하는 물질을 섭취하도록 환경을 조성함으로써 가스 상태로 전환시키거나 미생물을 폐기하는 형태로 계로부터 제거하는 장치이다.
The present invention relates to an advanced sewage treatment apparatus using a molasses fermentation apparatus, and in detail, when contained in sewage or wastewater and introduced into a lake or river, the present invention effectively removes nitrogen and phosphorus, which are limiting substances leading to eutrophication or water pollution. In the field of advanced processing, it is a device that removes from the system in the form of converting to a gas state or discarding microorganisms by creating an environment for ingesting substances present in water using metabolism of microorganisms.
이 분야의 기존 기술로는 부유성장 공법으로 MLE, A2/O, UCT, VIP, Bardenpho 공정 등의 외국공법이 있으며, 이와 관련된 당사의 특허는 특허등록 제 110119 호, 특허등록 제 0217893 호, 특허출원 2000-40440호 등이 있다.Existing technologies in this field include floating growth methods such as MLE, A 2 / O, UCT, VIP, Bardenpho process, etc.Our patents related to this are Patent Registration No. 110119, Patent Registration No. 0217893, Patent Application 2000-40440.
도 1에 예시한 바와 같이, 기존 기술인 A2/O 공정을 대표적으로 설명하면 다음과 같다. As illustrated in FIG. 1, a typical A 2 / O process will be described below.
1차 침전지(1)는 중력침강 작용에 의하여 용존성 고형물질을 사전에 제거하여 본 시설에 대한 부하를 경감시킨다. The primary sedimentation basin (1) reduces the load on the facility by removing dissolved solids in advance by gravity sedimentation.
혐기조(2)의 역할은 유기물질의 가수분해와 인의 용출이다. The role of the
유기물질의 가수분해는 인 제거 미생물의 영양물질로 사용될 뿐만 아니라 후 단에 있는 무산소조(3)의 탄소 공급원이 되기도 한다.Hydrolysis of organic materials is not only used as a nutrient for phosphorus-removing microorganisms, but also as a carbon source for the anoxic tank (3).
또한, 질산화조(4)에서 과잉 섭취된 인이 외부반송 배관 및 펌프(6)에 의하여 혐기조(2)로 유입되면 인 제거 미생물은 가수분해된 유기물질을 세포내에 PHB(poly-β-hydroxybutyrate)의 형태로 저장시킨다. In addition, when phosphorus excessively ingested in the
이때, 2차 침전지(5)로부터 반송되어 온 슬러지내에 과잉 섭취된 인을 방출하기도 하고, 중합 인산염 형태로 존재하는 인이 정인산염으로 가수분해 되기도 한다. At this time, the excess intake of phosphorus in the sludge conveyed from the secondary sedimentation basin (5) may be released, or phosphorus present in the form of polymerized phosphate may be hydrolyzed to regular phosphate.
무산소조(3)는 질산화조(4)에서 질산화된 질산화액이 유입원수에 존재하는 유기물질을 이용하며 질소가스로 환원되는 탈질과정이다. The oxygen-
원수내에 유기 탄소원이 충분한 경우는 탈질을 위한 약품비가 소요되지 않으나 부족한 경우에는 추가적으로 외부 탄소원을 공급하여야 한다. If there is sufficient organic carbon source in the raw water, there is no chemical cost for denitrification, but if it is insufficient, additional external carbon source should be supplied.
탈질반응은 종속영양 미생물에 의하여 이루어지므로 질소가스로의 환원을 위하여 미생물은 산화제를 필요로 한다. Since denitrification is carried out by heterotrophic microorganisms, microorganisms require oxidizing agents to reduce them to nitrogen gas.
탈질을 위한 전자공여체로 흔히 사용되는 약품으로는 아세트산, 메탄올 등이 있으나 경제적인 이유로 인하여 메탄올이 선호되어 왔다. Chemicals commonly used as electron donors for denitrification include acetic acid and methanol, but methanol has been preferred for economic reasons.
질산화액을 탈질조로 이송하기 위하여 내부순환 배관 및 펌프(8)가 설치되어 있다. In order to transfer the nitric oxide to the denitrification tank, an internal circulation pipe and a
질산화조(4)에서는 잔여 유기물질의 분해가 일어나고, 암모니아성 질소가 질산성 질소 형태로 변화되는 질산화 반응이 일어나는 영역이다.The
하지만 상기와 같은 종래의 기술은 유입수에 함유된 질소와 인을 제거하는데 필요한 유기물질이 부족한 경우에는 처리수 수질 악화가 초래되기 때문에 통상적으로 외부에서 탄소원으로 메탄올, 아세트산과 같은 약품을 주입하여 왔다. However, the conventional technology as described above has generally been injected with chemicals such as methanol and acetic acid as a carbon source from the outside because the deterioration of the treated water quality when there is a lack of organic substances necessary to remove nitrogen and phosphorus in the influent.
하지만, 메탄올은 자체가 미생물에 대하여 독성으로 작용하고 아세트산은 높은 가격으로 인하여 시설의 유지관리 비용이 상승하는 문제점을 가지고 있다.
However, methanol itself is toxic to microorganisms and acetic acid has a problem that the maintenance cost of the facility increases due to the high price.
상기와 같은 문제점을 해결하기 위한 본 발명의 목적은 제당과정에서 부산물로 발생하는 당밀은 원래 가축의 보조사료로 사용하여 오다가 유기물을 다량 포함하고 있는데 착안하여 하폐수처리시 외부탄소원으로 사용하는 유입수에 함유된 질소와 인을 처리하는 장치를 제공하는데 있다.An object of the present invention for solving the above problems is that molasses generated as a by-product in the sugar process is originally used as auxiliary feed of livestock, and contains a large amount of organic matter. It is to provide a device for treating nitrogen and phosphorus contained.
당밀은 공정 부산물이기 때문에 가격이 저렴하다는 장점이 있고, 산술적으로 가격을 비교하여 보면, 메탄올은 kg당 640원인 반면, 당밀은 140원으로 약 4.6 배의 가격경쟁력을 확보할 수 있으므로, 이와 같은 당밀을 이용한 장치를 제공하는데 있다.Molasses has the advantage of low price because it is a by-product, and arithmetically, the price of methanol is 640 won per kg, while molasses is 140 won, which can secure about 4.6 times the price competitiveness. It is to provide a device using.
하지만, 당밀을 직접 이용할 경우 혐기조, 무산소조, 질산화조를 거치면서 대부분의 유기물질이 제거되기는 하나 효율성을 기하기 위해서는 혐기조와 무산소조에서 각각 인방출과 탈질에 전량 소모되는 편이 낫다. However, when molasses is used directly, most organic substances are removed through the anaerobic tank, anoxic tank, and nitrification tank. However, in order to achieve efficiency, it is better to consume all of the phosphorus discharge and denitrification in the anaerobic tank and anoxic tank, respectively.
따라서, 상기와 같은 본 발명의 목적은 긴 사슬의 탄수화물과 사탕수수 조직에서 기원한 셀룰로스, 리그닌 등과 같은 난분해성 물질을 가수분해하여 미생물이 섭취하기에 용이하도록 하는 발효공정장치를 도입함으로써 달성된다. Therefore, the object of the present invention as described above is achieved by introducing a fermentation process apparatus for hydrolysis of hardly degradable substances such as cellulose, lignin, etc. originating from long-chain carbohydrates and sugar cane tissues to facilitate the intake of microorganisms.
상기와 같은 장치에 의한 공정을 제공시 구성성분이 대부분 탄수화물임을 감안할 때, 본 공정은 알콜발효와 같은 대사과정을 거쳐 C2, C3, C4 등의 단쇄상 탄수화물로 변화된다.
Considering that most of the components are carbohydrates when providing the process by the above device, the process is changed to short-chain carbohydrates such as C 2 , C 3 , C 4 through metabolic processes such as alcoholic fermentation.
상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명의 실시예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings, the configuration and the operation of the embodiment of the present invention to achieve the object as described above and to perform the task for eliminating the conventional drawbacks.
도 2는 본 발명의 장치 공정도이며, 도 3은 본 발명에 있어 발효장치의 상세도를 도시하고 있는데, 도 1에 예시한 기존 공정은 외국 원수 특성을 반영하여 고농도의 유기물질을 함유하고 있는 경우에 한하여 처리효율이 높다. Figure 2 is a process diagram of the device of the present invention, Figure 3 shows a detailed view of the fermentation device in the present invention, when the existing process illustrated in Figure 1 contains a high concentration of organic material reflecting foreign raw water characteristics The processing efficiency is high only.
본 발명은 도 2와 같이, 저농도 유기물질을 포함하며 상대적으로 질소 농도가 높은 국내 도시하수와 폐수의 특성을 반영하여 구성한 처리장치이다.
As shown in FIG. 2, the present invention is a treatment apparatus including low concentration organic materials and reflecting characteristics of domestic municipal sewage and wastewater having a relatively high nitrogen concentration.
본 발명의 장치 구성은 질소, 인을 함유한 하폐수 유입수를 1차 침전지(1), 혐기조(2), 무산소조(3) 질산화조(4), 2차침전지(5)를 거친 후 방류수(9)로 내보내도록 구성하고, 상기 질산화조(4)에서 발생된 질산화액 일부를 탈질조인 무산소조(3)로 이송하기 위한 내부순환 배관 및 펌프(8)와, 2차 침전지(5) 하부 호퍼에 모여진 일부 슬러지를 혐기조(2)로 반송하는 외부반송 펌프와 배관(6)과, 나 머지 슬러지를 폐기하는 슬러지 폐기 펌프와 배관(7)으로 구성된 하·폐수의 질소, 인 제거장치에 있어서, The device configuration of the present invention is the wastewater inflow water containing nitrogen and phosphorus after passing through the primary settling basin (1), anaerobic tank (2), anoxic tank (3) nitrification tank (4), secondary sedimentation battery (5) And the internal circulation pipe and pump (8) for transporting a part of the nitric oxide generated in the nitrification tank (4) to the anoxic tank (3) and the secondary hopper (5), the lower hopper. In the apparatus for removing nitrogen and phosphorus from sewage and wastewater, comprising an external conveying pump and a
상기 질산화조(4) 다음 단에 무산소조(3') 및 질산화조(4')를 추가로 더 포함시켜 구성하고, 외부탄소원으로써 당밀을 주입하도록 당밀을 발효시키는 당밀발효장치(11)를 구성하여 발효주입펌프(12, 12')를 사용하여, 혐기조(2) 및 무산소조(3)로 투입하도록 유로를 구성하고, 1차 침전지(1)를 거친 유입 원수를 혐기조(2)와 무산소조(3, 3')에 분할 주입하도록 유로를 구성하고, 상기 질산화조(4, 4')에서의 질산화 효율에 따라 무산소조(3)로 반송하는 내부반송 유로를 게이트 밸브(10, 10')로 변경하는 병렬식 내부반송 유로를 형성시킨 구성을 특징으로 한다.In the next stage of the
상기 당밀 발효장치(11)는 당밀을 저장하는 당밀 저장조(13)와 배관을 통해 당밀을 이송시키는 스크류 피더(14)와, 겨울철 배관내 이송을 원활히 하기 위한 배관내 가열장치(15)와, 희석수(17)로 당밀과 혼합하는 배관내 혼합장치(16)와, 이 배관내 혼합장치(16)를 통해 공급된 당밀을 교반장치 및 가온장치(19)를 사용하여 발효시키는 발효조(18)로 구성된다.
The
상기와 같은 구성의 본 발명을 보다 자세히 설명하겠다.The present invention of the configuration as described above will be described in more detail.
1차 침전지(1)는 기존 공정과 같이 고형물 부하를 줄이기 위하여 중력침강 방식으로 처리하는 공정이다. 1차 침전지(1) 유출수는 혐기조(2)와 무산소조(3)에 적정 비율로 분할 유입되고, 당밀을 주입할 경우에는 전량 혐기조(2)에 투입하거나 무산소조(3)에 전량 투입하는 경우도 있다. 당밀은 혐기조(2)에서의 인방출과 2차 무산소조(3')에서의 탈질을 원활하게 하기 위하여 각각 주입한다. 탈질율을 더욱 높이기 위해서는 1차 무산소조(3)에 주입하는 것도 용인한다. The primary sedimentation basin (1) is a process of gravity sedimentation in order to reduce the solids load as in the conventional process. The first settling basin (1) effluent is divided into the anaerobic tank (2) and the anaerobic tank (3) at an appropriate ratio, and when molasses is injected, the total amount is injected into the anaerobic tank (2) or in the entire anaerobic tank (3). . Molasses is injected in order to smooth out phosphorus discharge in the
질산화조(4, 4')에서 질산화된 질산화액은 수온에 따라 질산화율이 달라짐을 감안하여 게이트 밸브(10, 10')로 반송유로를 변경한다.이때 반송펌프와 배관의 용량은 유입수 용량대비 1∼3Q의 규모를 확보하여야 한다. The nitrification liquid nitrified in the nitrification tank (4, 4 ') changes the return flow path to the gate valves (10, 10') in consideration of the nitrification rate depending on the water temperature. The scale of 3Q should be secured.
1차 무산소조(4)는 유입수에 함유된 유기물질을 이용하고, 2차 무산소조(4')는 당밀을 이용하도록 차별화함으로써 약품비를 절감하도록 하였다. 통상 유로변경은 10℃를 전후하여 실시한다. The first
2차 침전지(5)의 역할은 오염물질을 제거하며 생성된 미생물과 물의 비중 차이를 이용하여 고액분리하고, 슬러지 일령을 고려하여 폐기하는 역할을 한다. 2차 침전지(5) 하부 호퍼에 모여진 슬러지는 외부반송 펌프와 배관(6)을 통하여 각조의 미생물 농도 유지를 위해 반송되고 슬러지 폐기 펌프와 배관(7)을 통하여 폐기된다. 침전지 상부의 처리수는 방류수(9)로 방류된다. The secondary sedimentation basin (5) serves to remove contaminants, solid-liquid separation using the difference in specific gravity of the produced microorganism and water, and to dispose of the sludge in consideration of the age. The sludge collected in the lower hopper of the secondary sedimentation basin (5) is conveyed to maintain the concentration of microorganisms in each tank through the external conveying pump and the pipe (6) and is disposed through the sludge waste pump and the pipe (7). The treated water on the settling basin is discharged to the effluent (9).
당밀 발효장치(11)를 도 3과 연계하여 자세히 설명하면, 당밀을 탱크로리로 운반하여 저장조(13)에 저장한 후, 적당량을 스크류 피더(14)로 주입한다. 스크류 피더(14)를 사용하는 이유는 당밀 자체가 비중 1.4이고, 점도가 높아 원심펌프 등 통상적인 이송펌프로 불가능한 물성을 가지고 있기 때문이다.The
겨울철 배관 내에서의 이송을 원활하게 하기 위하여 가열장치(15)를 두고, 희석수(17)로 당밀과 혼합하는 배관내 혼합장치(16)를 둔다.In order to facilitate the transfer in the winter piping, a
발효조(18)는 체류시간을 가변적으로 할 수 있고, 발효 효율을 높이기 위하 여 가온장치(19)를 장착한다. The
발효된 발효액은 저장조(20)에 보관하면서 발효액 주입 펌프(12, 12')를 이용하여 혐기조(2)와 무산소조(3')에 각각 정량 주입한다.
The fermented fermentation broth is metered into the
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.
상기와 같은 본 발명으로 기대할 수 있는 가장 큰 효과는 저비용으로 질소와 인을 제거할 수 있다는데 있다. The greatest effect that can be expected with the present invention as described above is that it can remove nitrogen and phosphorus at low cost.
또한, 당밀을 직접 이용할 때에는 혐기조(2)와 무산소조(3)를 거치면서 짧은 체류시간으로 인하여 일부만 제거되고 호기조(3')에서 제거되는 양상을 보였다. In addition, when using molasses directly through the anaerobic tank (2) and an anaerobic tank (3) due to the short residence time only part was removed and was removed from the aerobic tank (3 ').
약품과 효율관점에서 과량의 당밀 투입은 질산화 효율저하를 가져올 뿐만 아니라, 약품비용이 상승된다. Excessive injection of molasses from the point of view of drug and efficiency not only leads to a decrease in nitrification efficiency, but also increases the drug cost.
따라서, 투입한 당밀이 인 방출과 탈질에 직접 사용되도록 다당류들을 분해하는 발효조(19)의 역할이 지대하다 하겠다. Therefore, the role of the
또한, 당밀의 물성을 고려하여 주입장치를 장착함으로써 당밀 주입을 원활히 할 수 있고, 공정의 효율성을 기할 수 있었다.In addition, by injecting the molasses in consideration of the physical properties of the molasses it was possible to facilitate the molasses injection, it was possible to improve the efficiency of the process.
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| KR102336832B1 (en) * | 2021-02-03 | 2021-12-07 | 신영준 | Eco-friendly carbon source manufacturing device and wastewater treatment method using the same |
| WO2023184491A1 (en) * | 2022-04-01 | 2023-10-05 | 中山大学 | Denitrification strengthening method and device |
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| KR20010011875A (en) * | 1999-07-30 | 2001-02-15 | 채문식 | Method and Apparatus of Biological Nitrogen Removal from the High Concentration Industrial Wastewater |
| KR100322947B1 (en) * | 1999-09-15 | 2002-03-13 | 이병헌 | Method for removing nitrogen in waste water |
| KR20030003519A (en) * | 2001-07-03 | 2003-01-10 | 현대중공업 주식회사 | Pre-ozonation equipment of molasses for advanced sewage and wastewater treatment |
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| KR20010011875A (en) * | 1999-07-30 | 2001-02-15 | 채문식 | Method and Apparatus of Biological Nitrogen Removal from the High Concentration Industrial Wastewater |
| KR100322947B1 (en) * | 1999-09-15 | 2002-03-13 | 이병헌 | Method for removing nitrogen in waste water |
| KR20030003519A (en) * | 2001-07-03 | 2003-01-10 | 현대중공업 주식회사 | Pre-ozonation equipment of molasses for advanced sewage and wastewater treatment |
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