• Title/Summary/Keyword: Municipal

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Municipal Wastewater Treatment and Microbial Diversity Analysis of Microalgal Mini Raceway Open Pond (미세조류 옥외 배양시스템을 이용한 도시하수 정화 및 미생물 군집다양성 분석)

  • Kang, Zion;Kim, Byung-Hyuk;Shin, Sang-Yoon;Oh, Hee-Mock;Kim, Hee-Sik
    • Korean Journal of Microbiology
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    • v.48 no.3
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    • pp.192-199
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    • 2012
  • Microalgal biotechnology has gained prominence because of the ability of microalgae to produce value-added products including biodiesel through photosynthesis. However, carbon and nutrient source is often a limiting factor for microalgal growth leading to higher input costs for sufficient biomass production. Use of municipal wastewater as a low cost alternative to grow microalgae as well as to treat the same has been demonstrated in this study using mini raceway open ponds. Municipal wastewater was collected after primary treatment and microalgae indigenous in the wastewater were encouraged to grow in open raceways under optimum conditions. The mean removal efficiencies of TN, TP, COD-$_{Mn}$, $NH_3$-N after 6 days of retention time was 80.18%, 63.56%, 76.34%, and 96.74% respectively. The 18S rRNA gene analysis of the community revealed the presence of Chlorella vulgaris and Scenedesmus obliquus as the dominant microalgae. In addition, 16S rRNA gene analysis demonstrated that Rhodobacter, Luteimonas, Porphyrobacter, Agrobacterium, and Thauera were present along with the microalgae. From these results, it is concluded that microalgae could be used to effectively treat municipal wastewater without aerobic treatment, which incurs additional energy costs. In addition, municipal wastewater shall also serve as an excellent carbon and nitrogen source for microalgal growth. Moreover, the microalgal biomass shall be utilized for commercial purposes.

A Study on the Education and Training of the Municipal Policemen in Korea (한국 자치경찰의 교육훈련에 관한 연구)

  • Kim, Jong-Soo;Shin, Seung-Gyoon
    • Korean Security Journal
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    • no.16
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    • pp.19-45
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    • 2008
  • This study intended to examine the Korean municipal police operating system which is certain to be introduced to the nation, and verify the effect of the new appointment system presented herein from the viewpoint of police and experts in related areas, thus contributing to having the municipal police system in place stably. In particular, this study focused on the education and training in the process of a new appointment. On the basis of the discussion based on the results, it could be concluded that: First, it must be executed the adequate education and training to foster needed democratic policemen considering regional realities and different localities. Second, it must be included the open environment to train competent policement in the process of education and training. In addition, it needed to utilize the educational facilities and professor of regional universities. Third, it must be needed to secure independent education and training different from National Policemen Education. To do this, it must be developed curriculum fit for characteristics fo the municipal police system.

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A Study on the Current Status Analysis and Operation Strategies for Establishing the Mid- to Long-term Development Plans for Anyang Municipal Libraries (안양시 공공도서관 중장기 발전 계획 수립을 위한 현황 분석 및 운영 전략 연구)

  • Chang, Inho;Hoang, Gum-Sook;Song, Min Sun
    • Journal of the Korean Society for information Management
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    • v.39 no.1
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    • pp.145-170
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    • 2022
  • The purpose of this study is to derive the operation strategies for establishing the mid-to-long-term comprehensive library development plans considering the identity and specificity of Anyang City. For this purpose, this study proceeded as follows. First, to understand the internal and external environment and regional characteristics of Anyang City, various literature and statistical data related to Anyang City were collected, analyzed, and organized. Second, the operation status of Anyang municipal libraries was analyzed with data such as 「National Library Statistics System」, 「Gyeonggido Public Library Yearbook」, and various library-related laws. Third, a survey with open-ended questions was conducted for twenty-six librarians working in Anyang municipal libraries to collect opinions on the identity of Anyang and the overall operations of the libraries. Lastly, by reflecting the current status analysis, the latest library trends, policies, and sociocultural environments, detailed operation strategies that can serve as a basis for establishing mid-to long term development plans for Anyang municipal libraries in the future were proposed. The above operating strategies were proposed by dividing into six areas such as (1) the plans for organizational system and manpower composition, (2) the facility plans for balanced regional development, (3) the collection development and preservation direction, (4) the special subject materials service plans, (5) the for establishing cooperation system, and (6) the public relations plans.