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수록정보
수록범위 : 1권1호(2000)~22권3호(2021) |수록논문 수 : 1,124
한국환경기술학회지
22권3호(2021년 06월) 수록논문
최근 권호 논문
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KCI등재

1건조방법에 따른 하수슬러지 건조속도 비교 및 경제성 평가

저자 : 박성훈 ( Seong-hun Park ) , 김한석 ( Han-seok Kim ) , 이승원 ( Seung-won Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 183-190 (8 pages)

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In this study investigated the effect of the chemical injection ratio on the drying rate of sewage sludge. Then the economic efficiency was evaluated by comparing the results of the NIR(near infrared ray) and microwave drying rate test. The near infrared ray device showed drying speed of 31.9 %, 28.1 %, and 27.1 % at polymer dose ratio of 8 %, 10 %, and 12 %, respectively. Compared to 8 % polymer dose ratio, polymer dose ratio of 10 % and 12 % showed differences of 8.0 % and 13.6 % respectively, suggesting that drying efficiency decreased as polymer dose ratio increased. The microwave device showed drying speed of 26.2 %, 24.3 %, 21.3 % at polymer dose ratio of 8 %, 10 %, and 12 %, respectively. Compared to 8 % polymer dose ratio, polymer dose ratio of 10 % and 12 % showed differences of 5.2 % and 13.4 % respectively, suggesting that drying efficiency decreased as polymer dose ratio increased. Drying evaluation estimated the treatment cost of near infrared ray device at optimal dose ratio(6 %) was 35,591 won/ton while that of actual dose ratio(8 %) was 38,928 won/ton. Drying evaluation estimated treatment cost of microwave device at optimal polymer dose ratio(6 %) and at 8 % to be 16,683 won/ton and 18,352 won/ton, respectively.

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2호기성 미생물을 이용한 슬러지 감량 최적조건 연구

저자 : 최경식 ( Kyoung-sik Choi )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 191-196 (6 pages)

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This study focused on the optimum temperature and airflow volume for the operation of sludge reduction under the aerobic condition with the microbe s. This d e vice was installed in the sewage treatment plant in the B city with a 5 ton/day capacity. The medium of microbes was the mixture of sludge, microbes, and sawdust. Air was supplied to the air hole of the agitators. The moisture content o f t he input sludge was 8 0-82 %. The reduction rate of the sewage was more than 66.7 %, and the reduction time was operated from 16 to 29 hours, but it was found that the moisture content was reduced to less than 25 %. The correlation between the reduction rate, the amount of air flow, and the internal temperature of the reactor was derived. The air flow was about 4.9 to 5.3 m3/min to meet the aerobic condition. In the case of the internal temperature, it was found that when the temperature was above 50℃, the reduction rate was maintained at 90 % or more. The optimum reduction rate was achieved when it was maintained at least 40℃.

KCI등재

3선별이적처리를 통한 운영 중인 매립지의 재이용 방안

저자 : 이승원 ( Seung-won Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 197-202 (6 pages)

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In this study, the amount of landfill by on-site excavation landfill waste was calculated, and. the density was corrected to calculate the reuse capacity of the landfill. The amount of landfill waste that has been brought in is expected to be 6,647,056 ton. In addition the reuse and waste produced by the sorting transfer method was plastic, and throughput of 910,312 ton. The density-corrected reclaimed landfill capacity was estimated to be 2,276,000 m3. The landfill amount calculated by excavation was 841,201 ton, and the reclaimable landfill capacity was predicted to be 2,103,000 m3. Assuming that 930,312 ton of plastic are sorted and 30 % of 273,094 ton are processed in relation to the SRF power facility, that will produce 0.96 kW/ton(SRF standard) of electricity at 40,000 won/kW and profit of 17,477,990,400 won is expected. Currently, there are problems in securing the site of a new landfill and stabilizing the natural landfill, so if is useful for the early stabilization and efficient operation of the landfill that is being operated by introducing the selective transfer method.

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4아연 이온화 장치의 상수 중 철 시편과 수도 배관에 미치는 부식억제 효과 예측

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

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 203-212 (10 pages)

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This study quantitatively investigated the inhibition effect of corrosion on iron coupons and water pipes by ionization of zinc metal in tap water line. After installing iron coupons into water pipes and running tap water for 20 days, the average difference of the annual corrosion rates calculated from the weight losses of iron coupons with or without the ionization device was estimated to be 12.8 %. Comparing corrosion rates with or without corrosion inhibitor on new iron coupons showed higher difference in corrosion rates, but over time, the difference of corrosion rates between absence and presence of inhibitor had decreased gradually. It was also confirmed that the less rust-free pure iron area on the iron specimen and the less pure iron surface to react with oxygen in water gradually reduces the corrosion rate. X-ray diffraction analysis of the rust generated on iron coupons confirmed that most of them were red hematite(Fe2O3), and that some of the blackish parts were magnetite. It is known that the rust generated causes red tap water to fall, some of which develop into foot corrosion, resulting in pin-holes in the water pipes. Therefore, based on existing research results, we predicted the breaking time due to foot corrosion of iron coupons with or without corrosion inhibitors. Zinc corrosion suppressors were installed in water pipes where corrosion had already progressed and rusted, and the internal surface of the water pipes was observed to increase the relative ratio of the black magnetite components over time, and it was believed that corrosion suppressors could be expected for a long time.

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5Biofouling 방지를 위한 항균성 멤브레인 필터의 제조 : GMA의 그라프트 중합과 아민화/술폰화에 의한 표면개질

저자 : 나춘기 ( Choon-ki Na ) , 송재준 ( Jee-june Song )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 213-220 (8 pages)

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Biofouling is a major problem of membrane processes in water and wastewater treatment. One of the anti-biofouling strategies is to construct an antimicrobial membrane surface. In this study, polypropylene(PP) microfiltration membranes with antimicrobial property were fabricated by grafting glycidyl methacrylate(GMA), followed by amination or sulfonation with ethylenediamine or sodium sulfite solution. GMA was facilely grafted onto PP membrane by UV-induced graft polymerization, and the graft chains were easily aminated or sulfonated by a simple chemical reaction. The modified PP membranes were characterized by FT-IR, SEM, water permeability and antimicrobial tests. The PP membranes modified by grafting GMA improved the water permeability due to the hydrophilization of the surface, but the antimicrobial activity was too low. In contrast, aminated or sulfonated PP membranes exhibited high antimicrobial activity against both E. coli and S. aureus without a significant reduction in the water permeability.

KCI등재

6PEMT-MBBRs 공정 내 호기-혐기 및 HRT 변화에 따른 염색폐수의 COD 및 색도 제거특성

저자 : 박도현 ( Do-hyun Park ) , 윤태경 ( Tae-kyung Yoon ) , 정병길 ( Byung-gil Jung ) , 최영익 ( Young-ik Choi ) , 이강춘 ( Gang-choon Lee )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 221-227 (7 pages)

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Four stage pilot-scale moving bed biofilm reactors (MBBRs, aerobic-aerobic-aerobic-aerobic and anaerobicaerobic- aerobic-aerobic in series) were investigated to treat the textile dyeing wastewater at different HRT conditions. PEMT(Polyethylene-based modular tube), a carrier for biological wastewater treatment, was filled in each of reactors. In the aerobic-aerobic-aerobic-aerobic MBBRs, the COD removal efficiency of No. 1 aerobic MBBR was greater than 95 % of the total removal efficiency over 3 hrs HRT, and then was marginally increased through MBBRs No. 2 to No. 4. In the case that Alum was added to the effluent from the anaerobic-aerobic-aerobic-aerobic MBBRs, maximum COD and color removal efficiencies were 80 % and 75 %, respectively. In both of the aerobicaerobic- aerobic-aerobic MBBRs and the anaerobic-aerobic-aerobic-aerobic MBBRs, COD removal efficiency could be stably obtained by introducing raw textile dyeing wastewater directly into the biological treatment facility without any physicochemical pretreatment.

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7고급산화공정을 이용한 나프록센 분해에 대한 연구

저자 : 유찬서 ( Chan-seo You ) , 이헌 ( Heon Lee ) , 정상철 ( Sang-chul Jung )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 228-233 (6 pages)

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In order to effective degradation of naproxen as known the refractory organic pharmaceutical ingredients, we applied advanced oxidation processes (AOPs) such as the liquid phase plasma process and the photocatalytic oxidation process. The effect of electrical operation parameter of power supply in liquid phase plasma process and the dopants in the TiO2 photocatalytic oxidation process were evaluated. The degradation rate of naproxen in aqueous solution by liquid phase plasma process was improved as the operation parameters (Voltage, frequency, and pulse width) were increased. It is attributed that the plasma field and activated species was more generated according to the electrical energy supplied into liquid phase plasma process. The modified photocatalysts that doped with ytterbium (Yb) were prepared by liquid phase plasma process. The ytterbium on TiO2 surface was existed in the form of oxides. The naproxen degradation rate of modified photocatalysts was greatly improved than that of TiO2 under blue light as visible light region. This is because the ytterbium fabricated on the surface of the modified photocatalyst reduces the band gap energy and inhibits electron-hole recombination.

KCI등재

8폐가구류의 효율적 수거계획 수립을 위한 기초조사 연구

저자 : 김형섭 ( Hyung-seop Kim ) , 정정권 ( Jhungkwon Jhung ) , 최민준 ( Minjun Choi )

발행기관 : 한국환경기술학회 간행물 : 한국환경기술학회지 22권 3호 발행 연도 : 2021 페이지 : pp. 234-238 (5 pages)

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In order to establish an efficient collection plan for waste furniture as bulky waste, basic data such as moving distance of the collection truck, efficiency according to the type of truck, and collection amount per person, etc., are required. In Iksan City, one person discharged 20.8 kg of waste furniture during the year in 2019. The daily moving distance of collection truck was twice as long in rural areas as in downtown areas, while the amount of collection was twice as large in downtown areas. The amount of collection was twice as much for the tongs truck during the same working time as the general truck. When collecting wasted furniture in its original shape, trucks were move more than once a day than when collected after dismantling at the discharge site. However, in both cases, the total daily collection amount was similar. Unauthorized discharge of waste furniture in Iksan city was 3,288.3 tons/year in 2020, 36.4 % of the total amount generated.

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