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수록범위 : 1권1호(2000)~21권6호(2020) |수록논문 수 : 1,094
한국환경기술학회지
21권6호(2020년 12월) 수록논문
최근 권호 논문
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1해수담수화를 위한 나노버블 침투형 복합 하이드로싸이클론 전처리 기술개발

저자 : 문상욱 ( Sang-uook Moon ) , 최호은 ( Ho-eun Choi ) , 최영익 ( Young-ik Choi ) , 성낙창 ( Nak-chang Sung ) , 정병길 ( Byung-gil Jung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 411-419 (9 pages)

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The purpose of this research was to develop a nanobubble multihydrocyclone pretreatment technology that supplies SDI (Silt Density Index) of below 3 in order as alternative to, and etc. the existing coagulation filtration pretreatment process in seawater desalination. The used seawater in this research was sampled at a depth of 5 m in the sea located in B City. The average water quality of seawater was found to be turbidity of 1.28 NTU, TDS 29,800 mg/L, hardness 3,330 mg/L as CaCO3, total colony counts 190 CFU/100 mL, total coliforms 1,400 CFU/100 mL, and SO4 2- 1,890 mg/L. The nanobubble multi-hydrocyclone pretreatment process was consisted of a nanobubble generator, hydrocyclone, carbon filter, microfilter, RO pump, RO and UV systems. As a result of measuring (average of 5 times) the SDI of raw seawater, pretreated water, secondary treated water and final effluent were found to be 5.74, 3.42, 2.88 and 0.27, respectively. It was satisfied the SDI standard value of below 5 for seawater desalination pretreatment process. As a result of an economic evaluation for the coagulation sedimentation filtration process, the direct coagulation filtration process and the nanobubble multihydrocyclone process, which are the pretreatment processes for seawater desalination, the production cost per ton were 4,850 Won/m3, 4,528 Won/m3, and 3,821 Won/m3, respectively. Therefore, it was found that the nanobubble multi-hydrocyclone pretreatment process reduces operating costs by about 21 % compared to other pretreatment processes.

KCI등재

2서해중부 태안해안의 현장 부유입자물질 분포와 거동 연구

저자 : 이병관 ( Byoung Kwan Lee ) , 장성건 ( Seong Geon Jang ) , 김진현 ( Jin-hyun Kim ) , 황다혜 ( Da Hye Hwang ) , 김소연 ( So Yun Kim ) , 최윤영 ( Yun-young Choi ) , 이병준 ( Byung Joon Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 420-429 (10 pages)

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In-Situ Suspended Particulate Matter(SPM) concentration of the water column and particle size distribution above the middle layer and bottom layer were measured in the Taean-Haean National Park, West Coast of Korea. The short-term series of in-situ suspended particulate matter concentration, total volume concentration, beam attenuation coefficient, mean grain size, floc size and distribution have been ensemble averaged according to tidal variation. Time variation of in-situ particle size and concentration shows bottom layer supplies relatively fine-grained particles with compared to middle layer. This explains a good correlation between sediment concentration and beam attenuation coefficient due to well defined, monotonous size distribution. Abundance of small microfloc and large macroflos with time and water column size distribution indicated the difference between organic matter in marine snow of turbidity maximum near-bottom layer and fine grain primary particles of water column. The particles supplied toward lower water column from upper water column during low tide showed a multi-modal distribution with two-three peak at coarse fraction, possibly due to the resuspension and the flocculation associated with marine biological activity and the increased shear velocity at near bottom, break-up of large flocs. This study can be used qualitative and quantitative analysis of in-situ fine suspended sediment distribution, resuspension and flocculation, land(fresh water) and marine(sea water) based source of suspended particulate matters, according to marine environmental relationship and global climate change.

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3SRF 연료화발전시설 내 반입 폐기물의 성상분석을 통한 효율개선방안

저자 : 이승원 ( Seung-won Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 430-438 (9 pages)

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For this study properties investigation was conducted on the waste carried into B city SRF power generation facility, and apparent density was analyzed. The properties and throughput of waste currently being brought into the facility were compared between the time of design and the period from 2016 to 2019. In the field investigation, as for overall average of the primary and secondary investigation, the vinyl and plastic ratio was also high with 50.5 % and 50.9 % respectively. Compared to standard plastic garbage bags, the vinyl and plastic ratio in business standard plastic garbage bags was 10.2 % to 12.9 % higher. The reason for the increase in the amount of vinyl and plastic in business standard plastic garbage bags including those from shopping malls may be found in the fact that due to measures such as prohibition of bringing in recyclables from China, vinyl and plastic that should be recycled is mixed in standard plastic garbage bags and brought into the SRF power generation facility. Therefore, institutional devices that can help to increase the recycling ratio of vinyl and plastic in business standard plastic garbage bags should be provided. As for apparent density, vinyl and plastic, which accounted for the largest import rate in the field investigation, were as low as 70.0 ㎏/㎥ and 75.0 ㎏/㎥ respectively. When the import rate of vinyl and plastic with low apparent density is high, a high heating value is generated, which is helpful for power generation, but the throughput is reduced. Therefore, it is considered that a shedder process is necessary. Looking at the change in throughput based on these results, it was 197.60 ㎏/㎥ at the time of design. However, in 2016, 2017, 2018 and 2019 the throughput was 207.99 ㎏/㎥, 211.16 ㎏/㎥, 212.02 ㎏/㎥, and 181.96 ㎏/㎥ respectively according to this study, which shows a decrease of 15.64 ㎏/㎥(7.9 %) compared to design criteria. Here, the throughput at the time of design was 123.30 ㎏/㎥, excluding food, diapers and other incombustibles garbage, which are excluded as residue derived garbage. But the throughput in 2016, 2017, 2018 and 2019 was 111.64 ㎏/㎥, 112.95 ㎏/㎥, 98.02 ㎏/㎥ and 95.03 ㎏/㎥ respectively, showing decrease of 1.66 ㎏/㎥(9.5 %), 10.35 ㎏/㎥(8.4 %), 25.28 ㎏/㎥(20.5 %) and 28.27 ㎏/㎥(22.9 %) respectively. When converted to 844.82 ㎥/day, which is the daily throughput at the time of design, the throughput is expected to decrease by 80.18 ㎥/day, 74.3 ㎥/day, 173.0 ㎥/day and 193.3 ㎥/day in 2016, 2017, 2018 and 2019, respectively.

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4이온화식 상수도관 내부 부식억제기의 철 시편에 대한 부식억제 효과측정

저자 : 유미선 ( Mee-seon Yu ) , 양성봉 ( Sung-bong Yang ) , 심학섭 ( Hak-sup Shim ) , 이승혁 ( Seung-hyeok Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 439-446 (8 pages)

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This study aimed to measure the anti-corrosion effect of the zinc ionization device in running water. Cartridges of iron coupons were immersed in 2 plastic pipes that had flown the tap water for 20 days. Initial and final concentrations of ferrous ion and zinc cation in water were measured and weight losses of each coupon were weighed. And finally corrosion area of each coupons was compared with analyzing black and white figure of each corroded coupon by use of Image J program. Average weight loss of the coupons in running water with no corrosion inhibitor is 486 ㎎/dm2 for 20 days, whereas that of coupons with the corrosion inhibitor is 438 ㎎/dm2 for same period. Relative anti-corrosion effect of the inhibitor was calculated to be only 9.8 % with weight loss method. Average % areas of each corroded coupons with the inhibitor or no inhibitor were 20.5 % and 43.9 %. Relative anti-corrosion effect shown by average corroded area was 53.3 %. Inhibition effect of zinc ionization device in tap water indicated that corrosion area on the iron-coupon surface was decreased largely by dissolving zinc ion from zinc metal in water even though difference of weight loss of iron coupon was very small.

KCI등재

5개체군수지 모델을 이용한 기포와 다공성 탄소의 충돌 및 부상 효율 평가

저자 : 정흥조 ( Heung-joe Jung ) , 이재욱 ( Jae-wook Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 447-452 (6 pages)

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In this work, porous carbons with high surface area were prepared from giant Miscanthus through simple carbonization and activation processes. Adsorption equilibrium and kinetic data of methylene blue on the prepared carbon samples were well fitted with isotherm and kinetic models. On the other hand, the removal efficiency of porous carbons in DAF (dissolved air flotation) was evaluated based on the population balance model. Results showed that the zeta potential was highly sensitive depending on the water properties and coagulation conditions. It was also found that the collision efficiency of bubble-carbon particles in terms of zeta potential was successfully simulated by the employed population balance model.

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6도금폐수 처리공정 중 BPC 단위공정 내 ORP 및 pH 운전조건별 도금폐수의 Ni 및 T-P 제거특성

저자 : 정병길 ( Byung-gil Jung ) , 이승원 ( Seung-won Lee ) , 윤권감 ( Kwon-gam Yun ) , 정진희 ( Jin-hee Jeong ) , 최영익 ( Young-ik Choi )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 453-457 (5 pages)

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The purposes of this study were to evaluate the removal characteristics of Ni and T-P and to derive the optimum operating conditions according to the NaOCl injection methods by using ORP and pH for raw wastewater from the break point chlorinaton(BPC) unit process in the plating wastewater treatment process. The coagulant experiments were performed by using a Jar tester. After the coagulant tests, the supernatant water in the samples was filtered with a filter paper, and the concentration of Ni and T-P were analyzed using an ICP-OES analyzer. The removal efficiencies of Ni according to the polymer dosage at pH 10.0, 10.5 and 11.0 were 6.2 %, 1.8 % and 0.9 %, respectively. It showed the highest Ni removal efficiency at pH 10.0. The Ni removal efficiencies of raw wastewater by the continuous NaOCl injection method at 400 mV, 700 mV, 750 mV, 800 mV and 850 mV were 55.7 %, 86.6 %, 89.5 %, 94.0 % and 95.0 %, respectively. Also, the T-P removal efficiencies in the same condition were 10.8 %, 34.6 %, 51.2 %, 70.6 % and 88.5 %, respectively. Therefore, the proper ORP value considering the removal efficiencies of Ni and T-P was determined to be 800 mV.

KCI등재

7공공하수처리시설의 처리공법별 방류수질 비교와 ARIMA 시계열 예측에 관한 연구

저자 : 연익준 ( Ik-jun Yeon ) , 박성식 ( Sung-sik Park ) , 김창수 ( Chang-su Kim ) , 김송희 ( Song-hee Kim ) , 정지선 ( Ji-sun Jung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 458-466 (9 pages)

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This study aimed to make a comparison analysis of treatment methods and to forecast basic water quality components of effluent using ARIMA time-series focusing on small- scale public sewage treatment facilities located in a city of Chung-Ju. Following the comparison analysis, it was found there was statistically significant difference among the treatment methods specially in TN and TP. Based on ARIMA forecasting for next three years, it was estimated that the levels of BOD, COD, SS and TN would decrease except for TP in effluent from the public sewage treatment facilities.

KCI등재

8군부대 생활공간의 포름알데히드(HCHO)와 총휘발성유기화합물(TVOCs) 농도 수준

저자 : 최윤희 ( Yun-hee Choi ) , 이상윤 ( Sang-yoon Lee ) , 손현근 ( Hyun-keun Son ) , 윤조희 ( Cho-hee Yoon ) , 류재용 ( Jae-yong Ryu )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 467-471 (5 pages)

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This study aimed to identify the indoor air quality characteristics of formaldehyde (HCHO) and total volatile organic compounds (TVOCs) among hazardous substances in living space for military soldiers. To achieve this, we measured and analyzed HCHO and TVOCs, based on the Maintenance and Recommendation Standards designated in Clause 2 of Article 8 (Indoor Air Quality Management at Facilities Required for Military Life) of Enforcement Decree of 「Framework Act on the Status and Service of Soldiers」 Sampling dand Analysis were performed at 37 living spaces for military soldiers. As a result, it was found that the concentration of HCHO and TVOCs at administrative facilities was higher than other places such as education hall, dormitory, restaurant. Therefore it's necessary to ventilate indoor air more times at Administrative facilities.

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9졸겔법으로 합성된 Me-TiO2-sol의 광촉매 산화반응을 이용한 실내오염물질 제거활성 연구

저자 : 안석현 ( Suk-hyun Ahn ) , 정민기 ( Min-gie Jung ) , 정진도 ( Jin-do Chung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 472-479 (8 pages)

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In this study, a TiO2-sol photocatalytic study was conducted to remove CO, HCHO, and CH3CHO corresponding to various indoor pollutants. After coating on the inner surface of pyrex tube of various prepared TiO2-sol photocatalysts, the coating property was confirmed through FE-SEM analysis, and excellent removal performance was confirmed in uniform coating properties of TiO2 particles. However, the studied TiO2-sol photocatalyst has very low reaction activity to CO and HCHO, and can be solved through calcination/reduction heat treatment process by adding a noble metal Pt to solve this. Particularly, it was confirmed that the Pt/TiO2-sol photocatalyst increased the formation and dispersion of the surface Pt0 species through a reduction process, thereby improving the removal performance of CO, HCHO, and CH3CHO.

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10섬진강유역 측정유량의 물관리 활용도 개선

저자 : 정재성 ( Jae-sung Jung ) , 이효성 ( Hyoseong Lee ) , 박영기 ( Young-ki Park )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 21권 6호 발행 연도 : 2020 페이지 : pp. 480-488 (9 pages)

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The alternativity and reliability of major stream flows, the basis of water management in Seomjin river basin are investigated. Flow data measured by Ministry of Land, Infrastructure and Transport and Ministry of Environment etc. during last 10 years were equalized with area ratio flow method etc. and mutually compared. And they were analyzed annual correlation with correlation coefficient and error characteristics with mean absolute error(MAE) and root mean squared error(RMSE). Equivalent flow estimation equations which consider dam operation and water management conditions were suggested to convert the flows with different location and measuring method. Comparison of equivalent conversion flows by ME and other institute showed similar variation except some missing data. Correlation analysis showed correlation coefficients more than 0.8 annually and 0.9 totally. So the flows have good alternativity with each other. MAE of the flows were ranged 0.32~18.73 ㎥/s annually, 1.63~9.65 ㎥/s totally and the RMSE were ranged 0.66~70.34 ㎥/s annually, 3.22~19.97 ㎥/s totally. RMSE was 25 % larger than MAE for same flow data, but the proportional tendency of the error to the basin area of flow site was more clear at RMSE. The results can be useful to expand the water management data in Seomjin river basin.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동심리학41회 피인용

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2미국의 비트코인 규제

(2006)홍길동41회 피인용

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