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노후 하수관거 침입수/유입수 및 월류수의 유량·수질 특성과 관거정비 효과분석
박영기 ( Young-ki Park ),이형원 ( Hyung-won Lee ),정진필 ( Jin-pil Chung ),한상훈 ( Sang-hun Han ) 한국환경기술학회 2006 한국환경기술학회지 Vol.7 No.2
본 연구는 전주시 하수관거 정비상태 및 지역별 특성을 고려한 8개 지점을 선정하여 유량 및 수질조사를 실시하였으며, 이를 토대로 침입수/유입수(I/I) 및 강우시 미 처리된 월류수에 의한 수질오염사전예방 등 하수관거 기능을 극대화 할 수 있는 방법을 연구하고, 관거정비에 의한 유입수질 상승에 따른 전주하수처리장의 처리효율 변화와 수질오염총량제 전주시 목표수질 달성에 미치는 영향 등을 연구하는데 그 목적이 있다. 전주시 하수관거 정비사업을 실시할 처리구역을 대상으로 8개 지점을 선정하여 대상지역의 하수관거에 유입되는 지하수 및 우수와 그 반대로, 누수되는 하수량을 조사하였으며, 또한 BOD, COD<sub>Mn</sub>, COD<sub>Cr</sub>, SS, T-N, T-P 6개 항목에 대한 수질조사를 병행하였다. 이를 토대로 SWMM 모델을 통하여 유출량과 유출 부하량을 산정할 수 있는 기본 정보를 도출 제시하였다. This study aimed to measure the amount of water flow and water quality in specific areas that were chosen considering the sewer maintenance status and regional characteristics. These areas were divided into three categories: Apartment+houses, houses+shopping mall near the Jeonju watercourse and houses+shopping mall in downtown. I/I flows were measured. The amount of water flow was measured using SWMM model. Study results are summarized as follows: First, the amount of inflow and infiltration and water quality were closely related to sewer maintenance status and varied with residence areas. It is considered that excess inflow of indistinct water was attributed to aged sanitary sewer system and leaks in sewer pipes. It is therefore imminent to repair sewer lines in the area showing low water quality. Secondly, based on the analysis of the quality of CSOs in combined sewers, the concentration of SS and organic materials steeply increased in the wake of inflow of rainwater on the ground surface. This finding underlines the need for a proper control of CSOs in combined sewers in order to reduce water pollution of rivers. Thirdly, it was found that the amount of I/I was positively correlated to rainfall intensity. However, there were no differences in the amounts of outflow when measures taken in selected areas and results of SWMM model were compared. The use of SWMM model is considered effective to estimate the amount of outflow and evaluate sewer lines. Fourthly, according to the Total Maximum Daily Load established under the applicable law, Jeonju is supposed to maintain water quality of BOD 5.9㎎/ℓ and reduce BOD loading as much as 1,412.4kg/day. It is estimated that if the inflow of indistinct water declined by 50% through proper sewer management, a reduction of 166.5kg in BOD loading would be achieved in area A, which in turn contribute to the decrease in BOD loading by 11.8% in Jeonju as a whole.
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간헐 혐기·호기공법에 의한 축산폐수의 처리에 관한 연구
정팔진,김민정,현미희,정진필 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
The livestock waste which contains a high concentration of nutrients was operated by the continuous operation and anaerobic·aerobic process in order to observe the features of biological N, P reaction. As the characteristics of the livestock waste and Aiksang Busic Liquid were studied, the basic data of an efficient development of Aiksang Busic Liquide were suggested through the problems in a real operation. During the handling of livestock waste, the eliminating tendency of organic substats in a reactor and anaerobic·aerobic process were steady as same as SCODcr and TOC. The efflent SCODcr 1,575㎎/ℓ decreased to 820㎎/ℓ in an aerobic reactor. In addition, 52.2% of the efflent was eliminated and this figure indicated that the biological matters having the potential decomposition were completely decomposed. While the livestock waste was being handled by anaerobic·aerobic process, "24hr track study" was performed to measure "release-uptake rate" caused by poly-P organisms. The result of this study was quite different form the studies done before. Total N and dissolved N were hot released and these concentration sharply decreased during the anaerobic period. On the other hand, these concentration increased during the aerobic period.
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정팔진,김민정,권지영,정진필 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1
This study was performed in order to investigate organic matters and nutrieny contents of sediment on the Ik-san stream. Samples were collected 2 times during this study period at 5 points. The results were as follows ; The concentration of COD in the sediments were "Nonpolluted" by criteria of EPA. But the contents of volatile solids in the sediment were over 8%, "heavy polluted" by criteria of EPA. The concentration of Niitrogen in the sediments were "Nonpolluted" by criteria of EPA. And the concentration of T-P in the sediments were "Nonpolluted" by criteria of EPA. Therefore, it is surveyed that the sediments of Ik-san stream not yet polluted.
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손용엽,정진필 전남대학교 지역개발연구소 1994 지역개발연구 Vol.26 No.1
At the time of emerging of the new World Trade Organization(WTO), it is unavoidable for Korea to open its door and to face tougher competition with other countries in the world. The change of international business environments will enforce the Korean government to amend the old rules and industrial policies that have retrained competition in the domestic market and subsidied major industries selectively, and replace system of controlling money, price, and exchange rates by the one that respects economic logic more effectively. However, it is said to be more important to change the thought of economic agents to accomodate globalizion in their daily lives, than to change those institutions. Globalization is termed after the management style of big corporations which choose the location of their affliates at the most optimal points over the world and control them by international networking. But in this paper, we use $quot;globalization$quot; to mean: reforming the economic system Which bans exclusively or unfairly foreign firms from taking the opportunity of business in the domestic market and building a new system which consistently encourages the competition among firms regardless of their nationality. It can be said that the competitiveness of a nation mainly depends on firms' competitiveness, and that firms competitiveness is the most critical factor in determining the national competitiveness. But, a firm's competitiveness is defined by the capability of the firm to survive and grow without any protection and subsidy and to outreach competitors in taking customers from the world through fair competition with other firm's over the world. To find the way of enhancing firms' competitiveness we need to examine both the firm's outside relationship with other firms in the industry to which it belongs and the inside managerial strategies and activities. With the departure of the new international organization, it would be emphasized that the domestic firms have to compete directly with other firms from various conutries, and that there can no longer be any institutional protectionist shelter alleviating the sufferings from the harsh competition. To cope with the new situation, we will suggest the following to be done in the near future. First, the association of corporations and companies in a cetrain industry will abandon its competition-restraining activities and instead to do something beneficial to its members, such as putting common efforts to gather information. open up a new market, and develop a new technology for common use. Second, to survive the high degree competition in the world market and to win the quality competition of its commodities, it is recommended that the prime contractor firm and its subcontractors of small and medium size cooperate closely to improve the quality of the goods they produce collectively and to help the related firms to manage efficiently. The prime firm's care for the subcontractors will replace the protection of the government. The long-time and continuous transactions among the related firms is the necessary condition for the sound subcontract relationship. Third, the management needs to depend on higher rationality and efficiency. In each stage of the acquisition of resources. production and marketing, the value is added to the firm, and hence the firm sho weel put more efforts to maximize value created by evaluating the so-far-ignored sectors objectively and sicentifically and change the system of coordination and motivation. The factors which help a firm to survive as a successful one in such a rapidly changing world as today, are costdown, quality improvement. time management, and continuous improvement. But the most important thing for that matter is to recognize and respond to the change of environments as quickly as possible. To make it effectively, gathering information on the trend of the current change and reduction of the cycle time of the firm management procedure are of value. That is, in the areas of new product development, production process, and delivery to the customers, the firm will remove the waste of resources and pursue the continuous improvement in terms of the development of marketing technology. just-in-time order taking, and the reduction of the life cycle of the product. In this circumstances, the gubernatorial or provincial governments need to encourage the business associations to discard their bid for the small local market in the competition-restraining way and to bring in the mechanism promoting productive competition between the members of the association in the wide open market. It is good for the local government to subsidy the establishing and stabilizing subcontract relationship between the prime contractors and subcontractors, and the productive activities of business associations, together with reforming drastically the institutional and administrative structures. The local government can help the firm providing information gathered from the mutual exchange programs with its foreign counterparts.
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