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RISS 인기검색어
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- 저자 : 최충식(Chung?Sig Choi) (검색결과 4 건)
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최충식,주길재,이동훈,최충렬,이인구,최정 경북대학교 농업과학기술연구소 1999 慶北大農學誌 Vol.17 No.-
This study was conducted to evaluate the effects of microbial inoculation on sewage sludge composting. The number and species of microorganisms in sewage sludge sampled on February were higher than those sampled on August. The composting of sewage sludge is inhibited by the polyacrylamide cation, which was used as a coagulant and known to repress the growth of microorganisms. The growth of all microorganisms was inhibited by the addition of the polyacrylamide cation at a concentration of more than 0.8%. The species and viable counts of microorganisms were observed to increase during composting sewage sludge by inoculation of the effective microorganisms and addition of the pine tree sawdust as a bulking agent, compared with those without inoculation. A variety of organisms in compost(sewage sludge plus sawdust) were observed after composting for 30 days, such as Fragilaria sp., Proales sp., Vorticella sp., Schizothrix sp., Anabaena sp., Zoothaminium sp., Epstylis sp., Arcella sp., Balantidium sp., Actinophrys sp., Synedra sp., Euglypha sp., Ulothrix sp., Anacystis sp., and Clostium sp.
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최충식,이오석,권기석 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-
An halophilic bacterium was isolated from food-waste. The isolated strain was Gram-negative, aerobic bacterium. The range of temperature for growth of the isolate were 30-40℃. NaCl concentration for growth of it was 5-15%. The isolate was catalase and oxidase positive and sensitive to bacterium. It showed starch hydrolyzing and acid forming characteristics. The morphological, physiological and biochemical characteristics of the isolate resembled those of the Halococcus sp., therefore it was identified as Haloarcula sp. CH-667.
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최충식,하청근,권기석 7개 국립대학교 환경연구 논문집 공동발행 위원회 2002 환경연구논문집 Vol.2 No.1
The aim of the thesis is to value the features of Sequencing Batch Reactor and to discover the optimum condition by using synthetic wastewater. So as to develop the economical, efficient wastewater treatment technology which can remove substrate and nitrogen compounds by SBR Fill and Reaction time control. The results are summarized as fallows. 1. COD and T-N removal efficiency was below 95% in case of volumetric organic loading of 3㎏ BOD/㎥ day by Sequencing Batch Reactor. 2. Almost COD removed in the Fill time. 3. Various DO concentration are maximum in the Reaction time, and minimum in the Settle and Idle time. 4. COD and T-N were almost removed in Fill and Reaction time, the most suitable period was 5-3-2hr(Fill-Reaction-Settle). Removal efficiency of COD and T-N were over 98%.
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김무식,최충식,이오석,전장표 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-
We investigated the basic operation conditions and biological properties for the dyeing wastewater treatment by sequencing batch reactor(SBR) process. The results are summarized as bellow. The experimental results were constructed with design factor. a. COD removal efficiency was appeared to be over 53% when carbohydrate not added to dyeing wastewater. According to carbohydrate addition weight COD removal efficiency was improved to 92%. b. TKN removal efficiency was appeared to be over 43% when carbohydrate not added to dyeing wastewater. When carbohydrate added to dyeing waste water TKN removal efficiency was achieved 87%. In a conclusion, therefore, under all the conditions provided in this study Sequencing Batch Reactor process appeared to be effective, economical and useful process for dyeing wastewater treatment.
RISS
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