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한국수처리학회지 update

Journal of Korea Society of Water Science and Technology

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수록정보
수록범위 : 1권1호(1993)~29권5호(2021) |수록논문 수 : 1,384
한국수처리학회지
29권5호(2021년 10월) 수록논문
최근 권호 논문
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KCI등재

1용해화 기법에 의한 HDPE와 LDPE의 등전점 분석

저자 : 김선호 ( Sunho Kim ) , 송혜원 ( Hyewon Song ) , 김동수 ( Dong-su Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 5호 발행 연도 : 2021 페이지 : pp. 3-10 (8 pages)

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Solubilization technique was applied in determining the point of zero charge of HDPE and LDPE to suggest a method of removing the particles from the aquatic environment and separating different plastic types ahead of a recycling process. Since plastic, especially polyethylene has the potential to cause harm to humans and the ecosystem when broken down into small fragments and plastic particles can reach all domains of the earth through the hydrologic cycle, removing microplastics from the marine environment is crucial. The experiment was conducted to determine the surface characteristics of HDPE and LDPE by using the microplastic particles respectively to NaCl solution with different concentrations. The same amount of HCl was added to the solution to determine the point of zero charge of HDPE and LDPE. HDPE was observed to have a point of zero charge at 5.14 whereas the point of zero charge of LDPE was 5.28. It could be suggested that the pH of the solution can be controlled to 5.14 and 5.28 respectively. PE particles which are separated based on their point of zero charge are expected to be agglomerated and collected with high purity and converted into recycled raw material. Furthermore, this research is expected to contribute to studies that aim to remove other types of fine particles from unwanted places using a similar approach.

KCI등재

2리튬이차전지 공정부산물로부터 고효율 리튬 회수를 위한 전기투석 공정의 최적화 연구

저자 : 한덕현 ( Deokhyun Han ) , 정항철 ( Hang-chul Jung ) , 김보람 ( Boram Kim ) , 김대원 ( Dae-weon Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 5호 발행 연도 : 2021 페이지 : pp. 11-18 (8 pages)

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Recently, the demand for lithium has increased due to the rapid increase in the eco-friendly electric vehicle and energy storage system industry, and the waste liquid generated during the lithium secondary battery manufacturing process contains about 5000 ppm of lithium. Lithium contained in waste liquid is about 20 times greater than that contained in general seawater. In the case of general process waste, it cannot be reused immediately. But it can be recycled through the water treatment process. Among the various recycling processes, the electrodialysis recycling process uses electrical energy. Therefore, it is an eco-friendly water treatment method that can perform lithium concentration and desalination of lithium waste liquid and simultaneously treat purified water and lithium. In this paper, the electrodialysis optimal process conditions for lithium-containing waste liquids generated during the lithium secondary battery manufacturing process were confirmed. Variables input to the electrodialysis optimal process were combined using the Minitab program, and the individual effects and importance of each reaction were confirmed through Minitab. Analysis result values were identified as the desirability of the multi-response system. The optimization of the process was carried out using a design of experiments method and was performed and analyzed under three conditions: a concentration process, a desalination process, and a concentration and desalination process.

KCI등재

3In-line Inspection(ILI) 기반 확률론적 구조적 파손 예측

저자 : 이호민 ( Ho Min Lee ) , 배철호 ( Cheol-ho Bae ) , 최태호 ( Tae-ho Choi ) , 김정현 ( Jeong-hyun Kim )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 5호 발행 연도 : 2021 페이지 : pp. 19-29 (11 pages)

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Underground water supply pipelines are prone to functional deterioration and damage because of the occurrence and growth of corrosion over time. Therefore, to ensure the safety of such pipelines, their service life should be accurately predicted using precise inspection information. For this purpose, in-line inspection is applied for diagnosing pipelines. In this study, the structural safety of a water supply pipeline in Korea was evaluated by applying Monte-Carlo simulation, which is a stochastic analysis method, to the corrosion information of large-diameter water pipes obtained through a magnetic flux leakage sensor. For this purpose, the most appropriate probability distribution function and parameters were estimated through the statistical analysis of the data obtained from the sensor, and the corrosion growth was estimated using the probability distribution function determined from the simulation results. The safety factors for the internal pressure and external load for each pipe, which depended on the corrosion growth, could be derived probabilistically. Thus, the structural safety deterioration of the pipe over time could be estimated, and an appropriate rehabilitation method was proposed. In addition, the optimum rehabilitation time could be determined. This study will provide guidelines for the rehabilitation of water supply pipelines.

KCI등재

4먹는물의 미생물 실시간 감시를 위한 온라인 ATP 측정법의 적용

저자 : 남숙현 ( Sookhyun Nam ) , 황태문 ( Tae-mun Hwang ) , 김은주 ( Eunju Kim ) , 안주석 ( Jooseok An ) , 구재욱 ( Jae-wuk Koo ) , 이주원 ( Joowun Lee )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 5호 발행 연도 : 2021 페이지 : pp. 31-38 (8 pages)

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The evaluation of microbial contamination in drinking water is a major concern worldwide. Adenosine triphosphate (ATP) monitoring can serve as a complement to the HPC method currently used for water quality tests because it offers rapid measurement, ease of use, and activity against microorganisms. In this study, we proposed an alternative to in situ rapid microbial monitoring methods. The ATP levels in tap water and surface-treated water were monitored using an online ATP analyzer. The ATP level of the surface-treated water was three times higher than that of the tap water. Furthermore, the correlation between E. coli and ATP confirmed that if the number of microorganisms in water is small, the ATP data must be obtained according to the target water characteristics to enable the monitoring for microbial viability in drinking water. For effective E. coli monitoring, online ATP data was stored in its own server database and an internet-of-things (IoT)-based microbial monitoring system was established and successfully applied. Recent advances in the ATP technology and IoT technology have enabled the quick and accurate online monitoring of the ATP level in water. This helps in maintaining the microbial stability of drinking water by detecting the signs of its microbial contamination early and to process it as quickly as possible.

KCI등재

5하수처리수의 3차처리를 위한 고도산화법(AOP)의 적용성에 관한 연구

저자 : 정은호 ( Eunho Chung ) , 정종태 ( Jongtai Jung ) , 한상윤 ( Sangyun Han )

발행기관 : 한국수처리학회 간행물 : 한국수처리학회지 29권 5호 발행 연도 : 2021 페이지 : pp. 39-45 (7 pages)

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Ozone has been applied in combination with various processes for the tertiary treatment of municipal wastewater. However, in Korea, the ozone process is mainly employed for the reuse of tertiary treated wastewater, and an enhanced advanced oxidation process (AOP) is needed to realize the large-scale reuse of treated wastewater. In this study, various AOPs employing ozone (only ozone process, O3+H2O2, O3+UV, O3+GAC) were used to analyze the TOC, CODcr, and color treatment efficiencies of municipal wastewater and evaluate its applicability of wastewater reuse. The O3+H2O2 process showed the highest TOC removal efficiency of 62.0%, while the O3+GAC and only ozone processes exhibited the TOC removal efficiencies of 58.9% and 59.3%, respectively. The TOC removal pattern of the O3+UV process was similar to that of the O3+H2O2 process. The TOC removal efficiency of the O3+UV process, 61.0%, was slightly lower than that of the O3+H2O2 process. The CODcr removal efficiencies of the O3+UV and O3+H2O2 processes were 75.8% and 77.0%, respectively. However, the TOC and CODcr removal efficiencies were different within the error range, so there was no significant difference in the processing efficiencies of the methods investigated. The color removal efficiencies of the O3+UV (57.8%) and O3+H2O2 (57.4%) processes were 57.8%, 57.4%. respectively and it showed similar pattern.

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