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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korean Society of Water and Wastewater
Journal Basic Information
Journal DOI :
The Korean Society of Water and Wastewater
Editor in Chief :
Volume & Issues
Volume 27, Issue 6 - Dec 2013
Volume 27, Issue 5 - Oct 2013
Volume 27, Issue 4 - Aug 2013
Volume 27, Issue 3 - Jun 2013
Volume 27, Issue 2 - Apr 2013
Volume 27, Issue 1 - Feb 2013
Selecting the target year
A study on removal of cesium and strontium from aqueous solution using synthetic Na-birnessite
Cho, Yunchul ; Seol, Bit Na ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 155~164
DOI : 10.11001/jksww.2013.27.2.155
The main purpose of this research was to examine the adsorption/ion exchange characteristics of radioactive species such as cesium and strontium onto synthetic Na-birnessite (sodium-birnessite). As part of efforts to investigate the sorption behavior of cesium and strontium onto synthetic Na-birnessite, batch isotherm tests were performed under different experimental conditions. Na-birnessite was synthesized by the oxidation of
ions in sodium hydroxide solution. The synthetic Na-birnessite was characterized by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET) surface area analysis. Cesium and strontium concentrations were determined by atomic absorption spectroscopy (AAS). The removal efficiency of strontium by Na-birnessite was around 95 % which was much higher than that of cesium (~ 32 %). The results imply that strontium has a higher affinity for Na-birnessite than cesium because strontium, divalent cation leads to larger electrostatic attraction than monovalent cesium.
A Study on Correlation of Odorous Compounds and Odor Substance occurring in Septic Tank and Sewer Pipe
Song, Homyeon ; Cho, Jeongil ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 165~175
DOI : 10.11001/jksww.2013.27.2.165
This study aims to analysis correlation in septic tank and sewer pipe between odor substances and complex odor. For the analysis, convert odor substances to odor intensity, and estimate the effect of odor substances on complex odor. As a result, both Hydrogen sulfide and Methyl mercaptane of specified offensive odor substances accounted for 29 percent of the effect of odor substances on complex odor. Hydrogen sulfide and Methyl mercaptane are major cause of odor from septic tank and sewer pipe. The result of this study is suggested to be used as a preliminary data for research on analysis complex odor and odor substances.
Hydraulic Characteristics in the Movable Venturi Flume with Circular Cone
Kim, Dae Geun ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 177~184
DOI : 10.11001/jksww.2013.27.2.177
This study analyzed the hydraulic characteristics of a venturi flume with a circular cone using a 3-D numerical model which uses RANS(Reynolds-Averaged Navier-Stokes Equation) as the governing equation. The venturi flume with the circular cone efficiently measures the discharge in the low-flow to high-flow range and offers the advantage of accurate discharge measurements in the case of a low flow. With no influence of the tail-water depth, the stage-discharge relationship and the flow behaviors were analyzed to verify the numerical simulation results. Additionally, this study reviewed the effect of the tail-water depth on the flow. The stage-discharge relationship resulting from a numerical simulation in the absence of an effect by the tail-water depth showed a maximum margin of error of 4 % in comparison to the result of a hydraulic experiment. The simulation results reproduced the overall flow behaviors observed in the hydraulic experiment well. The flow starts to become influenced by the tail-water depth when the ratio of the tail-water depth to the total head exceeds approximately 0.7. As the ratio increases, the effect on the flow tends to grow dramatically. As shown in this study, a numerical simulation is effective for identifying the stage-discharge relationship of a venturi flume with various types of venturi bodies, including a venturi flume with a circular cone.
A Study on Water Quality Impact by Pollution Source in Yongwon Channel, Busan Newport
Kwon, Jae Hyun ; Kim, Young Do ; Jung, Jae Hoon ; Jeong, Weon Mu ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 185~196
DOI : 10.11001/jksww.2013.27.2.185
In Yongwon channel, its natural flow of seawater is blocked by the construction of Busan Newport including the container berth. The channel was transformed into a narrow and long one, where it is possible that ships are only allowed to pass through the north-side channel of Gyeonmado located at the point of river mouth to Songjeongcheon. In addition, Yongwon channel is approximately 100 m wide on average and 3,600 m long, which has the highest slenderness ratio (length/width=36). So it is considered that the changes in the terrain characteristics of Yongwon channel is likely to alter the circulation of sea water, thereby changing its water quality. In this study, the seasonal change and the spatial variation of the water quality in Yongwon channel was analyzed for the effect of land pollution using the measurement data. The mass balance calculation method is used to analyze the water pollution resulting from sediment pollutants. This result shows that the improvement of the water quality in Yongwon channel can be obtained from the sewer pipe modification and the environmental dredging.
Effect of Climate Change on Water Quality in Seonakdong River Experimental Catchment
Kang, Ji Yoon ; Kim, Jung Min ; Kim, Young Do ; Kang, Boo Sik ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 197~206
DOI : 10.11001/jksww.2013.27.2.197
Recently, climate change causes climatic anomaly such as global warming, the typhoon and severe rain storm etc. and it brings damage frequently. Climate change and global warming are prevalent all over the world in this century and many researchers including hydrologists have studied on the climate change. In this study, Seonakdong river watershed in the Nakdong river basin was selected as a study area. Real-time monitoring system was used to draw the rating curves, which has 0.78 to 0.96 of
. To predict runoff change in Seonakdong river watershed caused by climate change, the change in hydrologic runoff were predicted using the watershed model, SWAT. As a result, the runoff from the Seonakdong river watershed was increased by up to 45 % in summer. Because of the non-point sources from the farmland and the urban area, the water quality will be affected by the climate change. In this study, the operating plan of the water gates in Seonakdong river will be suggested by considering the characteristics of the watershed runoff due to the climate change. The optimal watergate opening plan will solve the water pollution problems in the reservoir-like river.
Characteristics of water quality at Han stream retention ponds in Jeju City
Kim, Jinkeun ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 207~214
DOI : 10.11001/jksww.2013.27.2.207
To evaluate characteristics of water quality in Jeju, a study was implemented for Han stream and retention ponds. Inflow water quality of retention ponds was heavily dependent on precedent rainfall, and no pesticide was detected due to the little artificial pollution sources. A smooth settling efficiency curve was noticed because heavy particles were already settled down in front of the retention pond. There were weak relationships between retention time and water quality, and this can be attributable to high concentration of pollutants influx at peak inflow. In addition, as Han stream retention pond has a role of groundwater recharge, inflow control based on water quality as well as quantity is needed to maximize pollutant removal at the retention ponds.
Unsteady Analysis of Hydraulic Behavior Characteristics in Water Treatment System Using CFD Simulation
Kim, Seong-Su ; Choi, Jong-Woong ; Park, No-Suk ; Wang, Chang-Keun ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 215~222
DOI : 10.11001/jksww.2013.27.2.215
The fluctuation of inlet flow to a water treatment plant makes a serious problem that it can change the outlet flowrate from each process abruptly. Since it takes very short time for the surface wave occurred from the fluctuation of inlet flow to reach the latter processes, it is impossible for operators to cope with that stably. In order to investigate the characteristics of hydraulic behavior for rectangular sedimentation basin in water treatment plant, CFD(Computational Fluid Dynamics) simulation were employed. From the results of both CFD simulations, it was confirmed that time taken for the follow-up processes by the fluctuation in intake well can be estimated by the propagation velocity of surface waves. Also, it takes very short time for the surface wave occurred from the fluctuation of inlet flow to reach the latter processes. In the case of inlet flowerate being increased sharply, local velocity within sedimentation basin appeared as wave pattern and increased due to convection current. Also, it could be observed that vortex made local velocity in the vicinity of bottom rise.
Estimation of Carbon Emissions and Energy Self-Sufficiency in Sewage Treatment plant's Improvement by using Life Cycle Management Tool
Moon, Jin-Young ; Park, Ji-Hyoung ; Hwang, Yong-Woo ; Park, Kwang-Ho ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 223~232
DOI : 10.11001/jksww.2013.27.2.223
In this study, carbon emissions and energy consumption were evaluated to establish a design strategy which has low energy consumption and carbon emission production, by using life cycle energy (LCE) and life cycle
calculation methods in life cycle management(LCM) tools. After improvement design projects, the energy consumption and
emission were calculated and compared in three sewage treatment plants (STPs), which are A STP, B STP, and C STP. The reduction of carbon emissions was 28,020.1 ton
, 37,399.6 ton
and 8,788.3 ton
, respectively. Production of energy was 792 TOE/yr, 1,235 TOE/yr and 1,023 TOE/yr, respectively. As a result, the estimation of energy and energy self-sufficiency was 5.1 %, 14.5 % and 23.5 %, respectively. The result of this study shows the LCM can be contributed to establish strategy for energy and carbon emission reduction in sewage treatment plants.
Study on the sampling rate for the purpose of use in water distribution network data
Lee, Kyounghwan ; Suh, JungChul ; Cha, Hunjoo ; Song, Kyosin ; Choi, Junemo ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 233~239
DOI : 10.11001/jksww.2013.27.2.233
Sampling rate of Hydraulic pressure data, depending on the intended use of the water distribution system is an important factor. If sampling interval of hydraulic data is short, that will be more useful but it demand a lot of expense for maintenance. In this study, based on simulation of water distribution system 2 khz data, statistical techniques of student t distribution, non-exceedance probability using the optimal sampling rate for research.
Treatment of ETA wastewater using GAC as particle electrodes in three-dimensional electrode reactor
Kim, Ran ; Kim, Yu-Jin ; Shin, Ja-Won ; Kim, Jeong-Joo ; Park, Joo-Yang ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 241~249
DOI : 10.11001/jksww.2013.27.2.241
Ethanolamine (ETA) is widely used for alkalinization of water in steam cycles of nuclear power plants with pressurized water reactor. When ETA contained wastewater was released, it could increase COD and T-N. The treatment of the COD and T-N from ETA wastewater was investigated using the GAC as particle electrodes in three-dimensional electrode reactor (TDE). This study evaluated the effectiveness of GAC as particle electrode using different packing ratio at 300 V. The results showed that GAC-TDE could reduce ETA much more efficiently than ZVI-TDE at the mass ratio of GAC to insulator, 1:2. Additionally, The effect of applied electric potential to COD and T-N reduction was investigated. The results showed the high COD, T-N reduction and current efficiency at the low electric potential. Using the GAC-TDE will provide a better ETA reduction with reducing electrical potential dissipation.
Effects of porous pavement on runoff reduction in Boguang subcatchment
Jung, Jiyun ; Lee, Gunyoung ; Ryu, Jaena ; Ohe, Jeill ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 251~259
DOI : 10.11001/jksww.2013.27.2.251
Among various Green Infrastructure measures for urban stormwater management, effects of porous pavement were quantitatively examined in terms of hydrological cycle. Different scenarios for porous pavement were introduced on a SWMM model and the effects were compared and analysed using discharge hydrographs. Two types of pavements having different runoff coefficients (0.05 & 0.5) were introduced to cover different ratio of entire road areas (100 %, 77.5 % and 40.4 %) and these made up in total 6 different scenarios. Total runoff volume was reduced and peak flow was significantly decreased by applying the porous pavement. The highest reduction for total runoff was shown from S-6(covering area: 100 %, runoff coefficient: 0.05) as 19 % followed by S-5(covering area: 77.5 %, runoff coefficient: 0.05, 16 %), while that of S-2(covering area: 40.4 %, runoff coefficient: 0.05) and S-1(covering area: 40.4 %, runoff coefficient: 0.5) were the lowest with 8 % and 5 %. This proved that the application of porous pavement would improve urban hydrological cycle.
Simulation study of DAF flotation basin using CFD
Park, Byungsung ; Woo, Sungwoo ; Park, Sungwon ; Min, Jinhee ; Lee, Woonyoung ; You, Sunam ; Jun, Gabjin ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 2, 2013, Pages 261~272
DOI : 10.11001/jksww.2013.27.2.261
Algae boom (Red tide) in south coastal area of Korea has been appeared several times during a decade. If algae boom appears in the desalination plant, media filter and UF filter are clogged quickly, and the plant should be shutdown. In general, Algae can be removed from water by flotation better than by sedimentation, because of the low density of algal cell. The purpose of this study conducts the CFD simulation of DAF flotation basin to apply the design of the dissolved air flotation with ball filter in the Test Bed for SWRO desalination plant. In this study, Eulerian-Eulerian multiphase model was applied to simulate the behavior of air bubbles and seawater. Density difference model and gravity were used. But de-sludge process and mass transfer between air bubbles and seawater were ignored. Main parameter is hydraulic loading rate which is varied from 20 m/hr to 27.5 m/hr. Geometry of flotation basin were changed to improve the DAF performance. According to the result of this study, the increase of hydraulic loading rate causes that the flow in the separation basin is widely affected and the concentration of air is increased. The flow pattern in the contact zone of flotation basin is greatly affected by the location of nozzle header. When the nozzle header was installed not the bottom of the contact zone but the above, the opportunity of contact between influent and recycle flow was increased.