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스폰지 및 세라믹 여재를 이용한 초기우수 여과장치의 최적설계인자 분석
조상열 ( Sangyeol Jo ),이범 ( Beom Lee ),박준규 ( Jungyu Park ),신원범 ( Wonbeom Shin ),석붕 ( Shi Peng ),전항배 ( Hang-bae Jun ) 충북대학교 산업과학기술연구소 2017 산업과학기술연구 논문집 Vol.31 No.1
Non point pollutants flowing contain various harmful substances releasing into the river water during rainfall. It is very important to control the initial storm water runoff. There are various methods to control the non point pollutants contained in the initial storm water, such as pond, wetlands, infiltration system, filtration system, and open channel system. Among them, a filtration system is an efficient and feasible system occupying relatively small site area. In this study, the optimum design parameters of an upflow filtration system using sponge and ceramic media were obtained from the betch scale experiments. As a result, 80% SS removal was possible at a filtration rate of 20m/h with 60cm depth of filter media. Recovery of head loss through backwashing, both with 30L/min of air and 30L/min of treated water. It is required for more than 7min.
미생물전기화학 혐기성소화조에서 전극간격이 메탄생성에 미치는 영향
신원범 ( Wonbeom Shin ),석붕 ( Shi Peng ),조상열 ( Sangyeol Jo ),전항배 ( Hangbae Jun ) 한국수처리학회 2017 한국수처리학회지 Vol.25 No.4
Electrode distance is a important factor for determining performance of bio-electrochemical anaerobic digestion (BEAD). In this study, the effects of electrode distances such as 0.3, 1.0, 3.0 cm on methane production, methane yield, organic matter removal efficiency, current density, coulombic efficiency, and energy efficiency were analyzed in a anaerobic digestor (AD) and BEAD reactors. COD removal efficiencies and daily methane productions in AD, BEAD(0.3), BEAD(1.0), and BEAD(3.0) reactors were 65.0, 75.8, 72.4, 68.1 % and 258, 357, 333, 276 mL/d, respectively. The current density and coulombic efficiency in BEAD reactor with electrode distance of 0.3 cm were 4.2 A/m<sup>2</sup> and 62.6 %, respectively. As the electrode distance increased from 0.3 cm to 3.0 cm, COD removal and methane production from the BEAD reactor were decreased. From these results, the electrochemical performances (such as current density, coulombic efficiency, and energy efficiency) increased as the electrode distance decreased, on the same time the methane production and COD removal efficiency also increased from the BEAD reactor with narrower electrode distance.