Biological denitrification of wastewater effluents with methane-utilizing mixed culture = 메탄가스를 이용하는 혼합균에 의한 폐수의 탈 질화반응에 관한 연구

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A methane-utilizing mixed culture isolated from activated sludge by selective enrichment was found to consist of more than three interacting species:methane utilizing bacterium, methanol utilizing bacterium, and unknown bacteria which might cause denitrification. These species grew well at different hydrogen ion concentration at 45$^\circ$C. Small addition of methanol to the methane-utilizing mixed culture was shown to inhibit the methane utilizing moiety in the culture and it was shown that methanol utilizing bacterium in the mixed culture removed any inhibitory methanol. It was determined that oxygen became limiting, if a ratio of oxygen to methane in the gas phase was adopted smaller than 1.24 and vice versa. Maintenance coefficient of nitrate at methane limiting condition was determined as 0.001 (g $NO_3$/gcell.h) and at oxygen limiting condition it was determined as 0.02 (g $NO_3$/gcell.h). The difference in maintenance coefficient of nitrate clearly explained dissimilatory denitrification under oxygen limiting condition. The denitrification rate mainly depended on dissolved oxygen concentration. The maximum denitrification rate obtained at dissolved oxygen concentration of 0.25 ppm was 84 (ppm/hr).
Advisors
Chung, In-Jae정인재
Description
한국과학기술원 : 화학공학과,
Publisher
한국과학기술원
Issue Date
1982
Identifier
63323/325007 / 000801124
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 화학공학과, 1982.2, [ [v], 79 p. ]

URI
http://hdl.handle.net/10203/30129
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63323&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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