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김환기,정우철,이복열 한국화학공학회 1986 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.24 No.5
본 연구는 폐하수중에 포함된 질소성분 제거에 관한 기초연구로서 주로 질산화 반응에 관한 것이다. 실험에 사용한 시료는 정화조 유출수와 유사한 합성폐수를 사용하였고 질산화 반응이 단계적으로 일어날 것을 고려하여 4단계 생물학적 유동층 반응기(Biological Fluidized Bed Reactor)를 고안하였으며 이 반응기를 이용하여 질산화 반응의 가능성을 검토하였다. 그 결과 질산화 반응은 후기단계에서 88∼97%의 NH^+₄ - N이 제거됨으로써 본 4단계 생물학적 유동층 반응기는 질산화 반응에 매우 합리적이었다. 또한 유동층 반응기내의 유체 흐름형태는 적정 순환비가 30정도로서 완전 혼합류로 고려된다. 질산화 반응의 속도론적 해석으로 유기물 제거속도는 질산화 반응속도의 3배로 나타났으며 동시에 산소에 의한 미생물 생성의 Kinetics도 검토하였다. A basic study is done on the biological nitrification for the removal of nitrogenous components from synthetic wastewater. The composition of synthetic wastewater is similar to a typical septic tank effluent containing a considerable amount of nitrogenous compounds. As nitrification process is supposed to be step reactions, 4 Biological Fluidized Bed Reactors are prepared. Thus the feasibility of this nitrogen treatment is discussed as follows. The results obtained showes that as the nitrification process proceeded, 88 to 97% of the NH^+₄-N was removed in the latter stages. Thus the 4 stage Fluidized Bed Reactors proved to be very good in nitrification. The flow pattern resulted in the complete mixing in each stage when the recycle ratio was about 30. The kinetic analysis of the nitrification reaction showed that the organic removal rate was faster than the nitrification rate by three times, and the kinetics of microorganism formation by oxygen is discussed also.
茂朱 南大川 上流水系 汚染이 本流의 水質에 미치는 影響에 關한 硏究
金煥基,崔頭炯,韓雄在 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1
This study was investigated for the pollution load of water quality in the basin of Wondangchon. Total pollution load was measured that BOD was 683.6 ㎏/day, SS was 1,436.184 ㎏/day, T-N was 237.244 ㎏/day, and T-P was 62.078 ㎏/day respectively inthere. Furthermore, it was estimated that BOD is 1,056.863 ㎏/day, SS is 1,840.657 ㎏/day, T-N is 299,922 ㎏/day, and T-P is 74.154 ㎏/day respectively in 2006 year. In case of BOD loading, that by population accounted for 63% of all BOD loading of that, 57% was discharged in M-4 drainage area. However, since tourists have been increasing gradually, that by population was estimated to be analogous to that by tourists in 2006 year. In case of SS loading, that by livestock was bigger than that by population by holding for 49% of all SS loading, and that by tourists was 9.8% now, however, ratio of that by tourists was estimated to be increased up to 25.8% in 2006 year. In case of T-N loading, that from wastewater treatment plant located in M-1 drainage area was the biggest by accounting for 56.2%. In case of T-P loading, that by livestock discharged form M-4 drainage area accounted for 44.3% of all T-P loading, and ratio of both of that by tourists and that from wastewater treatment plant gradually was estimated to be increased From above results, showing yearly change in pollution load of each water quality items is estimated to be increased continuously in every items, and in the influence of the pollution load of each drainage area upon Muju Namdaechon, M-4 drainage area was the biggest by accounting for 45% of total pollution load, and nest was ordered to M-1, M-2, M-3 and polltion load from wastewater treatment plant. The water quality of Namdaechon in Muju influenced by the study area was in the result of BOD 17.7%, SS 13.0%, T-N 28.2% and T-P 22.9%.
펜턴試藥을 이용한 廢水處理 슬러지의 脫水特性에 關한 硏究
金煥起,朴相肅,劉永壽 全北大學校 1997 論文集 Vol.37 No.-
This study was carried out to improve the dewatering characteristics of wastewater treatment sludge using Fenton's Reagent. The Fenton's Reagent consisting of FeSO_4 and H_2O_2 has powerful oxidizing ability and reactivity. According to the experimental results, primary dosage of FeSO_4 was more effective than secondary in the wastewater treatment sludge and the reagent was almost completed at about 20 minutes contact time with the wastewater sludge. The dosage ratio of FeSO_4:H_2O_2=1mole : 1.6mole was the highest dewatering efficiency. The specific resistance of Fenton's Reagent, 7.335×l0 exp (10)m/㎏, was much lower than these studied as 2.88×10 exp(14)m/㎏ of activated sludge and 1.05×10 exp(12)m/㎏ of conditioned digested sludge. Therefore, the Fenton's Reagent oxidized organics in and then improved dewatering of the wastewater treatment sludge.
김환기,반기문 동국대학교 일본학연구소 2022 일본학 Vol.58 No.-
코로나 팬데믹(pandemic)이 계속되는 가운데 전 세계의 위기국면은 한층 고조되는 추세다. 신냉전 시대로 불리며 러시아/우크라이나의 전쟁과 함께 글로벌 G2(미중)의 패권 경쟁도 격화일로다. 특히 ‘자유민주진영’과 ‘공산사회주의진영’으로 양분된 20세기의 냉전구도가 최근 ‘인도태평양’ ‘칩4’까지 겹치면서 재형성되는 형국이다. 이러한 지구촌의 위기국면은 고스란히 한국의 국가경쟁력과 맞물린다. 2022년 새로운 대통령이 취임했지만 갈라진 국민정서는 여전히 통합적 분위기와 거리가 멀다. 국가경쟁력을 걱정하는 언론매체의 각종 마이너스 지표들은 국민들의 삶을 한층 불안하게 한다. 하지만 한국은 미래지향적 핵심가치를 기반으로 경쟁력을 확보해야 하고 지구촌의 평화/공생을 위한 노력을 개을리 할 수 없다. 일찍이 반기문 유엔 사무총장은 범지구적 관점에서 외교, 안보, 평화, 공생을 위해 헌신하신 한국이 낳은 세계적인 지도자다. 유엔의 수장으로 지구촌의 각종 현안들을 챙기시며 세계의 평화/공존을 위해 큰 메시지를 던져오셨다. 이 자리에 반기문 유엔 사무총장을 모시고 21세기 무한경쟁시대를 살아가는 한국의 젊은이들에게 필요한 가치/세계관은 무엇이고, 지구촌의 평화/공생을 위한 핵심가치가 무엇인지 청해 본다.