레미콘 슬러지를 이용한 불소제거

강민구(Min Koo Kang),신관우(Gwan Woo Shin),이상일(Sang Ill Lee) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.11

본 연구의 목적은 칼슘염을 함유한 레미콘 슬러지를 이용하여 불소함유폐수를 물에 난용성인 CaF₂ 화합물 형태로 침전시켜 처리하는데 있어 pH, 레미콘슬러지 주입량, Seed물질 주입량, 교반속도, 교반시간의 최적 조건을 도출하고자 하는데 있다. 실험결과 레미콘 슬러지를 이용한 대상폐수의 CaF₂ 침전 반응에서 함수율 및 불소의 제거효율 등을 고려할 경우 최적의 pH 6, 레미콘 슬러지 주입량은 10 g/L, Seed 물질 주입량은 2 g/L, 교반속도은 100 rpm, 교반시간은 60 min으로 관찰되었다. 이 때 Seed 물질의 주입은 불소제거효율에는 영향이 없는 것으로 나타났지만 침전물의 형성이 되는 반응을 촉진시키고 플럭형성을 원활하게 하여 고액 분리가 잘 되어 함수율이 낮아지는 결과가 나타났다. The purpose of this study was performed to investigate the optimum conditions of pH, concrete sludge, seed dosage, mixing intensity, operation time in treating fluoride-containing wastewater as CaF₂ using the ready-mixed concrete sludge. Considering fluoride removal, water content, that pH 6, concrete sludge dosage of 10 g/L, Seed dosage (CaF₂) of 2 g/L, mixing intensity of 100 rpm and operation time of 60 min were found to be optimum. Correspondingly, removal of fluoride and water content was about 85% and 64%, respectively. Increase in amount of seed dosage did not affect fluoride removal efficiency. but the result that the water content is decreased was shown up in occuring the solid-liquid separation well.

쌍곡선형 완경사방정식을 이용한 비스듬한 입사파에 대한 연구

민병형,김인철,민일규,허상기 東亞大學校 海洋資源硏究所 1992 硏究論文集 Vol.5 No.1

Various kinds of calculation method for wave field have been proposed but some problems remain with regard to the accuracy of the shoaling coefficient(Tanimoto and kobune, 1975) or to the boundary conditions(Berkhoff, 1976). Thus, a hyperbolic mild slope equation was based on the flow rates and the wave surface elevation by Maruyama and Kijima(1985) but this model could not be calculated for waves moving obliquely into a wave field. In this study the fault of the hyperbolic mild slope equation is elliminated by treating lateral boundary condition as incident boundary condition. The result that the modified model is applied to a simple wave field agrees to the exact solutions.

호안단면의 안정성 검토에 관한 연구

민일규,이정환,민병형,김창동 東亞大學校 海洋資源硏究所 1998 硏究論文集 Vol.11 No.1

The necessity of development of the Nearshore zone and land reclamation has greatly emphasis in resent years. In this study, I investigated on the overtopping in the frontside of the reclamation and distance from revetment when dredging operations. Obtained results are summarized as follows. 1. In the result of the wave deformation model application, a significant wave height is 1.0m at reclamation the front revetment. 2. Experiment result of revetment section overtopping is in the permitted range of HUKUDA. 3. In the purpose of decision safety of revetment, I have been discovered the highest effect at 25m∼40m distance.

海雲臺 海濱 侵蝕防止에 관한 實驗的 硏究 : 突堤 및 離岸堤의 組合構造物에 대하여

閔丙亨,李承輝,민일규 東亞大學校 海洋資源硏究所 1988 硏究論文集 Vol.1 No.1

Recently the HAEUNDAE beach has an impact on intense erosion phemomena. At this point, the purpose of this study is to examine the sedimentation effect by using a three-dimensional hydraulic model test when a jetty is set up. jetty From the results of the experiment it can be concluded that the optimum length of jetty would be L₁=300m, direction angle would be θ=22.5°when, H=3.0m and T=8.0 sec. A jetty and offshore breakwater are also considered as a compound structure. From this experiment the optimum length of offshore breakwater would be L₂=200m. A jetty and T-Type jetty are also comtemplated as compound structure. From this experiment the optimum length of T-Type jetty would be L₃=300m.

Water Front개념이 도입된 부산의 해안역 개발에 관한 연구(Ⅱ)

민일규,이정환,서진호,민병형 東亞大學校 海洋資源硏究所 1994 硏究論文集 Vol.7 No.2

The purpose of this study is to establish the effective direction of development in the coastal zone of Pusan and understand the concept of water front which recently employed to analyze the area of city near the sea. It has been discussed about the present condition, the problem of application of Water-front, and the direction of development in the area of shore using the concept of Water-front. From the results of this study, it can be concluded that Pusan would be the pivot of Asian and Pacific zone with Pusan harbor if the concept of Water-front and the plan of its employment is carefully arranged.

감조하천의 유로단면변화에 따른 유황해석

민병형,민일규,이승휘,박한기,박홍준 東亞大學校 建設技術硏究所 1997 硏究論文集 Vol.21 No.2

The subject of this study apply to KyungSangNamDo Sachun-Si Sachun-bay sea area for builds up a industrial complex, and inquire into the phenomenon in compared after with before reclamation. I investigated, how to remove these harmful influence and make a estimate that a water-level, flow direction and river-bed evolution by inflow of river, wave' s attack. So we have come to the conclusion as follow. 1. Water Level : After reclamation, the water-level is ascended, but the water-level is stable after dredging and changing water-course. 2. Velocity of Flow : After reclamation, back water broke out, the velocity of flow was faster after dredging and changing water-course, but the velocity of flow came to be stable in the downstream. 3. River-bed Evolution : After reclamation, the severe erosion occurred in the front of revetment, but after dredging and changing the water-course as the new stable water-course constituted, river bed evolution decreased and the flood wave flow smoothly. 4. After reclamation, the water-level remarkably increased, but the velocity of flow was nearly the same.

방파제 평면 배치에 따른 항내 정온도에 관한 연구

민병형,민일규,이정환,강성기 동아대학교 건설기술연구소 1999 硏究報告 Vol.22 No.2

The harbor Calmness decides is hydraulic and numerical medel test. The study is Hongdo harbor building of accompany that hydraulic and numerical motel test as breakwater plan arrangement for analysis of in harbor clmness and The harbor operate rate as invsetigates is result as numerical model test. This summarize shoes the following result 1. The analysis result is nearly agreed of hydraulic and numerical model test. 2. The analysis result is case.4 is very calmness of hydraulic and numerical model test and case.1 is failed, case.2, case.3 of campared as case.3 of judged that more calmness of arrangement all borken course. 3. The analysis test results of the harbor operate rate case.1 is samall then another cases that critical wave height of anchor area but the calmness of anchor area of the case.1 that is much broarder than Hongdo anchor area therefor case.1 was decided no problme that ship is used harbor. This study result will be used of Hongdo harbor in the future for plan building of breatwater. The future for hardof high exactly as hydraulic and numerical model test especially, the will be studied numerical model test for beach reflection, breaking wave height, submerged friction.

홍도항의 방파제 배치에 따른 정온도에 관한 실험적 연구

민일규,박한기,민병형,이명우 東亞大學校 海洋資源硏究所 1998 硏究論文集 Vol.11 No.1

Through a study as hydraulic model test that applied a calmness test to the coast of Hongdo harbor as an optimal surface arrangement we could reach the following conclusion 1. In case of proposal 1, if an invaded wave is H₁/₃=8.46m, T₁/₃=13.0sec of an each wave direction the harbor calmness is as follows. The wave height ratio is about 0.6 at the entrance of a harbor 0.2∼0.3 anchor area in general and the value under 0.1 when the wave(H₁/₃=2.0m) is invaded as usual. 2. The calmness effect is more favorable by breakwater extension as proposal 2 & 3, but if the high wave is assaulted the wave height ratio of anchor area is 0.1∼0.2 owing to the diffraction wave at a SSE, SE direction. 3. In case of proposal 4 the harbor calmness is considerable satisfactory at ail direction and the wave height ratio of harbor under 0.1 when the high wave is invaded. Thereafter, a study that analyze and compare with the hydraulic model test by numerical analysis about the problem of harbor calmness that a short period wave has superiority will be continued

파랑변형 모형을 이용한 항내정온도 해석에 관한 연구

민일규,이정환,민병형,이영일 東亞大學校 海洋資源硏究所 1997 硏究論文集 Vol.10 No.1

Recently, by rapid growth of economic development, the guantity of ship movement is more increasing. The premier function of harbor is safe comming and going ancoring of the ship. Thus, provide efficient loading and unloading. To achive this role, the one of the most important things is to get calmness. The factor of influence the calmness is wave, wind and mooring condition. The most influenced thing of calmness is wave which is appear wave ratios. In this a treatise is to study the merits and demerits of the habor wave calculation method by numerical model and investigate wave character. The purpose of this treatise is to develope calculation algorithm to be used calmness calculation that is proposed by Watanabe and Maruyama. And to investigate the application, we applicated to Pusan harbor, compared and considerated with the data of Hydraulic model test(N.T.C., 1984) After this, I expected this model is so helpful to the analysis of calmness.

감조하천의 유로단면변화에 따른 유황해석

민병형,민일규,이승휘,박한기,박홍준 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

The subject of this study apply to KyungSangNamDo Sachun-Si Sachun-bay sea area for builds up a industrial complex, and inquire into the .phenomenon in compared after with before reclamation. I investigated, how to remove these harmful influence and make a estimate that a water-level, flow direction and river-bed evolution by inflow of river, wave's attack. So we have come to the conclusion as follow. 1. Water Level After reclamation, the water-level is ascended, but the water-level is stable after dredging and changing water-course. 2. Velocity of Flow : After reclamation, back water broke out, the velocity of flow was faster after dredging and changing water-course, but the velocity of flow came to be stable in the downstream. 3. River-bed Evolution : After reclamation, the severe erosion occured in the front of revetment, but after d]:edging and changing the water-course as the new stable water-course constituted, river bed evolution decreased and the flood wave flow smoothly. 4. After reclamation, the water-level remarkablely increased, but the velocity of flow was nearly the same.