地域社會 發展과 環境汚染에 對한 小考

王昌槿 忠南大學校 地域開發硏究所 1989 地域開發論叢 Vol.1 No.-

용존 공기에 의한 여과지의 역세척 공정 개발

왕창근,오영미 忠南大學校 環境問題硏究所 2001 環境硏究 Vol.19 No.-

Rapid sand filters used for removing turbidity materials in drinking water treat ment plants should be periodically backwahed to eliminate filtered flocs. Water and water/air backwashing systems have been adopted traditionally. However, these systems have some drawbacks such as incomplete washing of filters, large amount of backwashing(DABW) process was developed(Patent pending) to solve the drawbacks mentioned above. Wahshing efficiency of rapid sand filter has been tremendously improved and head losses after backwashing decreased. Further, backwashing time could be reduced significantly resulting in saving large amount of backwashing water.

KIDEA Process에 의한 오염물질 제거특성연구

왕창근,강호 충남대학교 환경문제연구소 2000 環境硏究 Vol.18 No.-

A series of experiments were performed to analyze wastewater characteristics and to determine the treatment process. Nitrogen and phosphorus removal efficiency became very important factor in determining the process recently. There are many processes to reduce nitrogen and/or phosphorus (Bardenpo, A/O, A2/O, VIP, UCT etc). The KIDEA process, which was selected in this study, Consists of aeration, sedimentation, and intermittent withdrawl steps. The bench-scale experiment was performed using Sabkyo and mixed wastewater and influent was fed to the reactor continuously. Effluent concentration of T-N was 11.1∼14.1 mg/L. Effluent concentration of T-P was 2.6∼3.63 mg/L. The KIDEA process can be applied to treat the wastewater with low carbon concencentration.

대청호 상수원수 중의 탁도, 유기오염물질, 조류 및 투입분말활성탄 제거를 위한 DAF 공정 응용

왕창근,이승근 忠南大學校 環境問題硏究所 2001 環境硏究 Vol.19 No.-

DAF(Dissolved Air Flotation0 is an effective alternative process to conventional sedimentation in water containing low-density particles. The water is saturated with compressed air to dissolve the air into the water at high pressure in a saturation tank. Then the water containing dissolved air is released into a floatation tank at a lower pressure, generating micro-bubbles that rise gently through the water and carry the suspended matter to be surface. Removal efficiencies of turbidity, chlorophyll-a, DOC and UV_254Abs. by DAF and conventional sedimentation for raw water from Dae-chung Lake wee compared. DOC removal efficiency after adding PAC(Powdered Activated Carbon) was also investigated. At low turbidity, the removal efficiency of turbidity, chlorophyll-a, DOC and UV_254Abs was 92.4%, 94.4%, 20.2% and 24.9% respectively. It is concluded that the DAF process is feasible for efficient removal of turbidity and algae in Daejeon water treatment plants.

내시경부비동수술후 비음형대, 스펙트럼 및 비·부비동의 용적변화의 분석

김창수,공수근,이현순,조규섭,왕수건,노환중 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.11

RO 및 NF막에서의 부식질에 의한 Fouling 및 미량오염물질의 제거

왕창근,차준철,이용현,김수동,류주환 대한상하수도학회 2004 상하수도학회지 Vol.18 No.1

This study investigated the phenomena of membrane fouling by NOM and the effect of the fouling on removal of micro-pollutants. NOM has a great effect on decline of permeate flux. Permeate flow rate was reduced by 88% in RO and 34.8% in NF for 323hr operation period. Removal rate of UV_(254), is 87.4% in RO and 78.5% in NF and removal rate of DOC is 42.7% in RO and 32.9% in NF for 2㎎/l humic acid. Removal efficiency of the micmpollutants by the RO and NF membranes fouled by humic acid was mostly lower than that by the new membrane. The concentration polarization which affects the flux and the rejection was thought to occur in the active layer of the membrane, as the membrane was getting fouled.

생활하수처리를 위한 CNR Process 설계요소 연구

왕창근,전문환 충남대학교 환경문제연구소 2000 環境硏究 Vol.18 No.-

A biological nutrient removal system combining A2O process with biofilm was studied in this work and the characteristics of nitrogen and phophorus removal was especially investigated for the Cilium Nutrient Removal Process(CNR process). The CNR process consisted of anaerobic, anoxic, aerobic zone in series, and aerobic zone contains packed cilium media. The CNR has benefits in solving the problems which inhibit denitrification and phophorus uptake in anoxic reactor due to the lack of organic compounds. The bench-scale experiment was performed using Tae-jon and Um-am domestic wastewater and the influent was accomplished with step-feed loading to the reactor. Removal efficiency of contaminants including BOD, COD, TN and TP was relatively high.

대청호 상수원수 중의 탁도, 유기오염물질, 조류 및 투입분말활성탄 제거를 위한 DAF 공정 응용

왕창근,이승근 대한상하수도학회 2002 상하수도학회지 Vol.16 No.5

DAF (Dissolved Air Flotation) is an effective alternative process to conventional sedimentation in water containing low-density particles. The water is saturated with compressed air to dissolve the air into the water at high pressure in a saturation tank. Then the water containing dissolved air is released into a floatation tank at a lower pressure, generating micro-bubbles that rise gently through the water and carry the suspended matter to the surface. Removal efficiencies of turbidity, chlorophyll-a, DOC and UV_(254)Abs. by DAF and conventional sedimentation for raw water from Dae-chung Lake were compared. DOC removal efficiency after adding PAC (Powdered Activated Carbon) was also investigated. At low turbidity, the removal efficiency of turbidity, chlorophyll-a, DOC and UV_(254)Abs was 92.4%, 94.4%, 20.2% and 24.9% respectively. It is concluded that the DAF process is feasible for efficient removal of turbidity and algae in Daejeon water treatment plants.

운동장을 이용한 우수의 포집, 수량 및 수질에 관한 연구

왕창근,이영복,이동곤 忠南大學校 環境問題硏究所 2003 環境硏究 Vol.21 No.-

In this study, quantity and quality of rainwater collected by soil and sand as the playground collection materials were investigated and CNURCPM (Chungnam National University Rainwater Collection Prediction Model) was developed to predict amount of collected rainwater. Quantity of collected rainwater in soil and sand (depth 5 cm) collection system was 615 L(63%) and 7,315 L(77%) for study period, respectively. Average turbidity of collected rainwater in soil and sand collection system was 9.70 NTU, 2.05 NTU for study period, respectively. In case of heavy metal, the concentrations of Fe and A1 were higher than the other heavy metals in both soil and the sand. But in this analyzing the Fe and A1 were less than the standard of water quality that was required in drinking water. So the collected water was insignificant because concentration of heavy metal was not serious. List of water quality; pH, TOC, COD_(Mn), NH_(4)-N, NO_(3)-N were lower or a little higher than the standard of water quality and the item of coli-form was higher than the standard of water quality. These result suggest that the water needs the second treatment such as disinfection. To predict amount of collected rainwater, CNURCPM was developed. For sand collection material, predicted amount by CNURCPM and actual collected amount were 7,534 L and 7,315 L, which were very closed.

패각을 이용한 수중의 인 제거 기술 개발

최근준,왕창근 忠南大學校 環境問題硏究所 1999 環境硏究 Vol.17 No.-

Phosphorus in natural water and wastewater exists in supersaturated state due to low solubility, and it is difficult to form crystals and precipitates because precipitation rate in steps of nucleation, crystal growth, agglomeration and ripening is slow. Precipitation rate can be increased by seeding the crystals which has components and structure similar to the precipitates. This study is based on the precipitation mechanism and was performed to see phosphorus removal efficiency of various clamshells serving as surface precipitation media. The results obtained from this study are following ; From XRD analysis for various clamshells, major component of clamshell used as phosphorus removal material is found to be CaCO₃/aragonite. The batch tests with the clamshells showed excellent phosphorus removal efficiency up on 99% depending on the experimental condition. Phosphorus removal efficiency was dependent on temperature, detention time, pH and shell particle size, and appeared relatively high removal efficiency at high temperature, long detention time, low pH and small shell particle size. Phosphorus removal technology using clamshells has many advantages of reusing solid wastes, not producing sludge as well as not adding chemicals.