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수직형 막여과 정수처리시설의 최적 설계 및 운영방안 도출
김관엽,남해욱,김윤중,곽동근 한국막학회 2015 한국막학회 총회 및 학술발표회 Vol.2015 No.05
본 연구에서는 막여과공정, 오존접촉공정, 활성탄흡착공정, 자외선소독공정 등이 계층형으로 배치된 정수처리 실증시설의 설계 및 운영을 통해 수직형 정수 처리시설의 최적 설계/운영방안을 도출하고자 하였다.
이종현,남해욱,김영규,박태주 한국환경과학회 1999 한국환경과학회지 Vol.8 No.1
A new biological nutrient removal system combining A^2/O process with fixed film was developed in this work and the characteristics of denitrifcation were especially investigated in the combined fixed film reactor(CFFR). Media was added in the anaerobic, anoxic and aerobic reactors, respectively. Tests were made to establish the effluent level of NO_x-N, COD, DO and nitrite effects on NO_x-N removal in the CFFR by decreasing hydraulic retention time (HRT) from 10.0 to 3.5 hours and by increasing internal recycle ratio form 0% to 200%. The influent was synthesized to levels similar to the average influent of municipal wastewater treatment plants in Korea. SARAN media with a porosity of 96.3% was packed 40%/30%/25% based on its reactor volume, respectively. It was found that COD rarely limited denitrification in the anoxic reactor because of high C/NO_x-N ratio in the anoxic reactor, while DO concentration in the anoxic reactor and NO_2-N/NO_x-N from the aerobic effluent inhibited denitrifcation in the anoxic reactor. It was proved that the critical points of DO concentration in the anoxic reactor and NO_2-N/NO_x-N from the aerobic effluent were 0.15㎎/L and 10%, respectively. As the internal recycle ratio increased, DO concentration in the anoxic reactor and NO_2-N/NO_x-N from the aerobic effluent increased. Especially, at the condition of internal recycle ratio, 200%, DO concentration in the anoxic reactor and NO_2-N/NO_x-N from the aerobic effluent exceeded the critical points of 0.15㎎/L and 10%, respectively. Then, denitrification efficiency considerably decreased. Consequently, it was represented that the control of DO concentration in the anoxic reactor and NO_2-N/NO_x-N from the aerobic effluent can assure effective denitrifcation.