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원통형 Al 전극과 Fe 전극을 이용한 하수 중 인 제거 특성 비교
윤용수,김사동 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.5
The aim of this paper is to compare the characteristics of the T-P removal from synthesized municipal wastewater by electro-coagulation using cylindrical Al and Fe electrode as anode. For this purpose, a concentric circle type electrolysis reactor was used and the operating conditions for T-P removal from synthesized wastewater are as follows; potential 10 V, electrolyte 0.03% NaCl, initial T-P concentration 1.0 ~ 6.0 mg/L and flow rate 1.0 ~ 5.0 L/min. From the experimental results, T-P concentration of treated wastewater was decreased to less than 0.2 mg/L enough to discharge standard and Al electrode showed performance than Fe electrode for T-P removal by electro-coagulation. Optimal conditions for T-P removal to less than 0.15 mg/L which is 75% of discharge standard for large scale municipal wastewater plant (capacity higher than 500 m3/day) were obtained as follows; flow rate 2.503 L/min, and 2.337 L/min, HRT 1.059 min, 1.134 min, for Al and Fe electrode, respectively. Consumed mass of Al and Fe were of 3.76 times and 8.90 times respectively, were obtained to removed T-P at optimal conditions with potential 10 V, and 0.03% NaCl as electrolyte.
염색폐수의 전해처리에 의한 탈색 및 COD , TOC 제거 특성
윤용수,전영규,하범용,박근원 한국공업화학회 1998 응용화학 Vol.2 No.1
This study was performed to measure and evaluate the characteristics of COD and TOC removal, and decolorization efficiency in the electrolytic treatment by using iron anode and aluminum cathode for the acid dye Red 114 generally known the most difficult to degrade in the dyestuff. The electrolysis can be feasible to Dye-wastewater cause of high decolorizing efficiency. high COD removal efficiency, and short reaction time.
윤용수 한국아랍어아랍문학회 2001 아랍어와 아랍문학 Vol.5 No.1
Some sociolinguistic scholars divided the phenomenon of code-shifting into the interference, borrowing and code-switching according to he chosen code in the conversation. And it has been cleared that code-switching is not random alternation of two (or more) varieties both between and within sentences but to be governed not only by extra-linguistics but also linguistics factors. That is to say, it has been proved that there are some constraints of code-switching. In this articles, I will analyze the form and constraints of code-switching in Arabic language based on the educated Arabs' speech. I also will divide the code-shifting of the educated Arabs' speech into the interference, borrowing and code-switching and try to analysis each character. And I will try to find the general constraints of code-switching in the educated Arabs' speech.