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상하수도학회지 update

Journal of the Korean Society of Water and Wastewater

  • : 대한상하수도학회
  • : 공학분야  >  토목공학
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수록정보
수록범위 : 1권1호(1987)~34권6호(2020) |수록논문 수 : 1,991
상하수도학회지
34권6호(2020년 12월) 수록논문
최근 권호 논문
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KCI등재

1대한상하수도학회지 목차

저자 : 대한상하수도학회

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 1-2 (2 pages)

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2호소수 탁도변화 대응을 위한 고플럭스 막여과공정의 Pilot 연구

저자 : 강준석 ( Joonseok Kang ) , 성자영 ( Jayeong Seong ) , 유제완 ( Jewan Yoo ) , 김형수 ( Hyungsoo Kim ) , 이재규 ( Jaekyu Lee ) , 전민혁 ( Minhyuk Jeon ) , 천지훈 ( Jihoon Cheon )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 393-402 (10 pages)

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In the membrane process, it is important to improve water treatment efficiency to ensure water quality and minimize membrane fouling. In this study, a pilot study of membrane process using reservoir water was conducted for a long time to secure high flux operation technology capable of responding to influent turbidity changes. The raw water and DAF(Dissolved Air Flotation) treated water were used for influent water of membrane to analyze the effect of water quality on the TMP (Trans Membrane Pressure) and to optimize the membrane operation. When the membrane flux were operated at 70 LMH and 80 LMH under stable water quality conditions with an inlet turbidity of 10 NTU or less, the TMP increase rates were 0.28 and 0.24 kPa/d, respectively, with minor difference. When the membrane with high flux of 80 LMH was operated for a long time under inlet turbidity of 10 NTU or more, the TMP increase rate showed the maximum of 43.5 kPa/d. However, when the CEB(Chemically Enhanced Backwash) cycle was changed from 7 to 1 day, it was confirmed that the TMP increase rate was stable to 0.23 kPa/d. As a result of applying pre-treatment process(DAF) on unstability water quality conditions, it was confirmed that the TMP rise rates differed by 0.17 and 0.64 kPa/d according to the optimization of the coagulant injection. When combined with coagulation pretreatment, it was thought that the balance with the membrane process was more important than the emphasis on efficiency of the pretreatment process. It was considered that stable TMP can be maintained by optimizing the cleaning conditions when the stable or unstable water quality even in the high flux operation on membrane process.

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3미래 그린 해수담수화 기술

저자 : 김정빈 ( Jungbin Kim ) , 홍승관 ( Seungkwan Hong )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 403-410 (8 pages)

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The difficulty of securing freshwater sources is increasing with global climate change. On the other hand, seawater is less affected by climate change and regarded as a stable water source. For utilizing seawater as freshwater, seawater desalination technologies should be employed to reduce the concentration of salts. However, current desalination technologies might accelerate climate change and create problems for the ecosystem. The desalination technologies consume higher energy than conventional water treatment technologies, increase carbon footprint with high electricity use, and discharge high salinity of concentrate to the ocean. Thus, it is critical to developing green desalination technologies for sustainable desalination in the era of climate change. The energy consumption of desalination can be lowered by minimizing pump irreversibility, reducing feed salinity, and harvesting osmotic energy. Also, the carbon footprint can be reduced by employing renewable energy sources to the desalination system. Furthermore, the volume of concentrate discharge can be minimized by recovering valuable minerals from high-salinity concentrate. The future green seawater desalination can be achieved by the advancement of desalination technologies, the employment of renewable energy, and the utilization of concentrate.

KCI등재

4하수처리시설에서 인 고도처리를 위한 일체형 침전부상공정(SeDAF)의 응집제 주입농도 자동제어기법 검토

저자 : 장여주 ( Yeoju Jang ) , 정진홍 ( Jinhong Jung ) , 김원재 ( Weonjae Kim )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 411-423 (13 pages)

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To remove phosphorus from the effluent of public wastewater treatment facilities, hundreds of enhanced phosphorus treatment processes have been introduced nationwide. However, these processes have a few problems including excessive maintenance cost and sludge production caused by inappropriate coagulant injection. Therefore, the optimal decision of coagulant dosage and automatic control of coagulant injection are essential. To overcome the drawbacks of conventional phosphorus removal processes, the integrated sedimentation and dissolved air flotation(SeDAF) process has been developed and a demonstration plant(capacity: 100 m3/d) has also been installed. In this study, various jar-tests(sedimentation and / or sedimentation·flotation) and multiple regression analyses have been performed. Particularly, we have highlighted the decision-making algorithms of optimal coagulant dosage to improve the applicability of the SeDAF process. As a result, the sedimentation jar-test could be a simple and reliable method for the decision of appropriate coagulant dosage in field condition of the SeDAF process. And, we have found that the SeDAF process can save 30 - 40% of coagulant dosage compared with conventional sedimentation processes to achieve total phosphorus (T-P) concentration below 0.2 mg/L of treated water, and it can also reduce same portion of sludge production.

KCI등재

5활성탄 개질에 따른 표면 특성 변화가 2,4-dichlorophenol 흡착성능에 미치는 영향

저자 : 안선경 ( Sun-kyung An ) , 송원중 ( Won-jung Song ) , 박용민 ( Young-min Park ) , 양현아 ( Hyeon-a Yang ) , 권지향 ( Ji-hyang Kweon )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 425-435 (11 pages)

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Numerous chemical modifications on activated carbon such as acidic conditioning, thermal treatment and metal impregnation have been investigated to enhance adsorption capacities of micropollutants in water treatment plants. In this study, chemical modification including acidic, alkaline treatment, and iron-impregnation was evaluated for adsorption of 2,4-dichlorophenol (2,4-DCP). For Fe-impregnation, three concentrations of ferric chloride solutions, i.e., 0.2 M, 0.4 M, and 0.8 M, were used and ion-exchange (MIX) of iron and subsequent thermal treatment (MTH) were also applied. Surface properties of the modified carbons were analyzed by active surface area, pore volume, three-dimensional images, and chemical characteristics. The acidic and alkaline treatment changed the pore structures but yielded little improvement of adsorption capacities. As Fe concentrations were increased during impregnation, the active adsorption areas were decreased and the compositional ratios of Fe were increased. Adsorption capacities of modified ACs were evaluated using Langmuir isotherm. The MIX modification was not efficient to enhance 2,4-DCP adsorption and the MES treatment showed increases in adsorption capacities of 2,4-DCP, compared to the original activated carbon. These results implied a possibility of chemical impregnation modification for improvement of adsorption of 2,4-DCP, if a proper modification procedure is sought.

KCI등재

6남조류 Synechococcus sp.의 혐기-호기법에 의한 인 과잉섭취 효율에 미치는 유기/무기 탄소원의 영향

저자 : 유미영 ( Mi-yeong Yu ) , 김윤지 ( Yun-ji Kim ) , 최윤정 ( Yun-jeong Choi ) , 황선진 ( Sun-jin Hwang )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 437-443 (7 pages)

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Biological phosphorus removal is accomplished by exposing PAO(phosphorus accumulating organisms) to anaerobic-aerobic conversion conditions. In the anaerobic condition, PAO synthesize PHB(polyhydroxybutyrate) and simultaneously hydrolysis of poly-p resulting phosphorus(Pi) release. In aerobic condition, PAO uptake phosphorus(Pi) more than they have released. In this study, cyanobacteria Synechococcus sp., which is known to be able to synthesize PHB like PAO, was exposed to anaerobic-aerobic conversion. If Synechococcus sp. can remove excess phosphorus by the same mechanism as PAO, synergistic effects can occur through photosynthesis. Moreover, Synechococcus sp. is known to be capable of synthesizing PHB using inorganic carbon as well as organic carbon, so even if the available capacity of organic carbon decreases, it was expected to show stable phosphorus removal efficiency. In 6 hours of anaerobic condition, phosphorus release occurred in both inorganic and organic carbon conditions but SPRR(specific phosphorus release rate) of both conditions was 10 mg-P/g-MLSS/day, which was significantly lower than that of PAO. When converting to aerobic conditions, SPUR(specific phosphorus uptake rate) was about 9 mg-P/g-MLSS/day in both conditions, showing a higher uptake rate than the control condition showing SPUR of 6.4 mg-P/g-MLSS/day. But there was no difference in terms of the total amount of removal. According to this study, at least, it seems to be inappropriate to apply Synechococcus sp. to luxury uptake process for phosphorus removal.

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7난분해성 산업폐수 처리를 위한 고도산화기술

저자 : 김민식 ( Min Sik Kim ) , 이기명 ( Ki-myeong Lee ) , 이창하 ( Changha Lee )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 445-462 (18 pages)

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Industrial wastewater often contains a number of recalcitrant organic contaminants. These contaminants are hardly degradable by biological wastewater treatment processes, which requires a more powerful treatment method based on chemical oxidation. Advanced oxidation technology (AOT) has been extensively studied for the treatment of nonbiodegradable organics in water and wastewater. Among different AOTs developed up to date, ozonation and the Fenton process are the representative technologies that widely used in the field. Based on the traditional ozonation and the Fenton process, several modified processes have been also developed to accelerate the production of reactive radicals. This article reviews the chemistry of ozonation and the Fenton process as well as the cases of application of these two AOTs to industrial wastewater treatment. In addition, research needs to improve the cost efficiency of ozonation and the Fenton process were discussed.

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8회동수원지의 정수처리 공정을 위한 DAF pilot plant 운영 성능평가

저자 : 맹민수 ( Minsoo Maeng ) , Nirmal Kumar Shahi , 김동현 ( Donghyeun Kim ) , 신귀암 ( Gwyam Shin ) , 독고석 ( Seok Dockko )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 463-471 (9 pages)

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A 1,000 ㎥/d DAF(dissolved air flotation) pilot plant was installed to evaluate the performance of the floating process using the Nakdong River. Efficiency of various DAF operations under different conditions, such as hydraulic loading rate, coagulant concentration was evaluated in the current research. The operation conditions were evaluated, based on the removal or turbidity, TOC(total organic carbon), THMFP(trihalomethane formation potential), Mn(manganese), and Al(aluminum). Also, particle size analysis of treated water by DAF was performed to examine the characteristics of particles existing in the treated water. The turbidity removal was higher than 90%, and it could be operated at 0.5 NTU or less, which is suitable for the drinking water quality standard. Turbidity, TOC, and THMFP resulted in stable water quality when replacing the coagulant from alum to PAC(poly aluminum chloride). A 100% removal of Chl-a was recorded during the summer period of the DAF operations. Mn removal was not as effective as where the removal did not satisfy the water quality standards for the majority of the operation period. Hydraulic loading of 10 m/h, and coagulant concentrations of 40 mg/L was determined to be the optimal operating conditions for turbidity and TOC removal. When the coagulant concentration increases, the Al concentration of the DAF treated water also increases, so coagulant injection control is required according to the raw water quality. Particle size distribution results indicated that particles larger than 25 μm showed higher removal rates than smaller particles. The total particel count in the treated water was 2,214.7 counts/ml under the operation conditions of 10 m/h of hydraulic loading rate and coagulant concentrations of 60 mg/L.

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9유기물 농도가 낮은 고품질 정수 생산을 위한 고압막여과 공정 설계 시 고려사항

저자 : 전종민 ( Jongmin Jeon ) , 김성수 ( Seong-su Kim ) , 서인석 ( Inseok Seo ) , 김수한 ( Suhan Kim )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 473-480 (8 pages)

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High-pressure membrane system like nanofiltration(NF) and reverse osmosis(RO) was investigated as a part of water treatment processes to produce high quality potable water with low organic matter concentration through membrane module tests and design simulation. River water and sand filtration permeate in Busan D water treatment plant were selected as feed water, and NE4040-90 and RE4040-Fen(Toray Chemical Korea) were used as NF and RO membranes, respectively. Total organic carbon(TOC) concentrations of NF and RO permeates were mostly below 0.5 mg/l and the average TOC removal rates of NF and RO membranes were 93.99% and 94.28%, respectively, which means NF used in this study is competitive with RO in terms of organic matter removal ability. Different from ions rejection tendency, the TOC removal rate increases at higher recovery rates, which is because the portion of higher molecular weight materials in the concentrated raw water with increasing recovery rate increases. Discharge of NF/RO concentrates to rivers may not be acceptable because the increased TDS concentration of the concentrates can harm the river eco-system. Thus, the idea of using NF/RO concentrate as the raw water for industrial water production was introduced. The design simulation results with feed water and membranes used in this work reveal that the raw water guideline can be satisfied if the recovery rate of NF/RO system is designed below 80%.

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10수 환경 분야에서의 딥러닝 모델 적용사례

저자 : 표종철 ( Jongcheol Pyo ) , 박상훈 ( Sanghun Park ) , 조경화 ( Kyung-hwa Cho ) , 백상수 ( Sang-soo Baek )

발행기관 : 대한상하수도학회 간행물 : 상하수도학회지 34권 6호 발행 연도 : 2020 페이지 : pp. 481-493 (13 pages)

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Deep learning models, which imitate the function of human brain, have drawn attention from many engineering fields (mechanical, agricultural, and computer engineering etc). The major advantages of deep learning in engineering fields can be summarized by objects detection, classification, and time-series prediction. As well, it has been applied into environmental science and engineering fields. Here, we compiled our previous attempts to apply deep learning models in water-environment field and presented the future opportunities.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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(2006)홍길동심리학41회 피인용

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(2006)홍길동41회 피인용

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