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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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 20, Issue 6 - 00 2006
Volume 20, Issue 5 - 00 2006
Volume 20, Issue 4 - 00 2006
Volume 20, Issue 3 - 00 2006
Volume 20, Issue 2 - 00 2006
Volume 20, Issue 1 - 00 2006
Volume 16, Issue 3 - 00 2006
Selecting the target year
Participation of Residents for Improvement of Water Quality and Confidence
Choi, Suing-il ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 167~174
Shibaura Wastewater Reclamation Facility Using Ozonation and Microfiltration
Kim, Seung-Hyun ; Lee, Chul-Hee ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 175~177
Erbil Water Supply and Sewerage System Improvement Project
Jin, Kwang-Ho ; Kim, Beom-Seok ; Son, Dae-Ik ; Shin, Hang-Sik ; Hong, Tae-Hee ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 178~184
Forecasting the Long-term Water Demand Using System Dynamics in Seoul
Kim, Shin-Geol ; Pyon, Sin-Suk ; Kim, Young-Sang ; Koo, Ja-Yong ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 187~196
Forecasting the long-term water demand is important in the plan of water supply system because the location and capacity of water facilities are decided according to it. To forecast the long-term water demand, the existing method based on lpcd and population has been usually used. But, these days the trend among the variation of water demand has been disappeared, so expressing other variation of it is needed to forecast correct water demand. To accomplish it, we introduced the System Dynamics method to consider total connections of water demand factor. Firstly, the factors connected with water demand were divided into three sectors(water demand, industry, and population sectors), and the connections of factors were set with multiple regression model. And it was compared to existing method. The results are as followings. The correlation efficients are 0.330 in existing model and 0.960 in SD model and MAE are 3.96% in existing model and 1.68% in SD model. So, it is proved that SD model is superior to the existing model. To forecast the long-term water demand, scenarios were made with variations of employment condition, economic condition and consumer price indexes and forecasted water demands in 2012. After all scenarios were performed, the results showed that it was not needed to increase the water supply ability in Seoul.
Leakage Control and Application Using the Pressure Reducing Valve
Kim, Shin-Geol ; Kim, Youn-Hwan ; Kim, Kyoung-Pil ; Koo, Ja-Yong ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 197~206
The leakage in the water distribution system means both the loss of money and water resource. To minimize the leakage, we introduced the pressure control method using the pressure reducing valve and pump schedule. For the pressure control, the total leakage is needed to divide into each node. In this study, EPANET 2.0 was used to simulate the water networks in two selected blocks after the total leakage was distributed with each node by four ways. The leakage was allocated into each node as water measured by meter, water pressure, water faucets and Lpcd and simulated by EPANET 2.0. Regardless of the leakage distribution ways, there was no significant difference between the measured water and the estimated water pressure. Thus, the leakage distribution way using water pressures estimated by simulation could be recommended. The scenarios controlling the pressure reducing valve and pump were made in two blocks(A and B).
leakage in the A block and
in the B block could be reduced as controlling the pressure reducing valve and pump schedule. It was shown that the fifty million won a year can be saved in the A block and 6.8 million won in the B block.
Transient Analysis and Experiment Considering Unsteady Friction and Leakage in a Pipeline System
Lee, Mi-hyun ; Song, Yong-sok ; Kim, Sang-hyun ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 207~214
The current paper focuses the analysis of leakage detection in water pipeline systems by means of the transient method. In order to obtain essential data for evaluation the existing methodology, an extensive experimental process has been carried out in a single pipeline system, Several experimental tests were performed with and without a leakage in the system. Using the unsteady friction and improved unsteady friction factors gives reasonable match between the computed and measured results on the condition of the flow situations presented in the paper. The transient method attempts to estimate the leakage in water pipelines using observed pressure data collected during transient events on the system.
Internal Corrosion Control of Drinking Water Pipes by pH and Alkalinity Control and Corrosion Inhibitor
Kuh, Sungeun ; Woo, Dalsik ; Lee, Doojin ; Kim, Juwhan ; Ahn, Hyowon ; Moon, Kwangsoon ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 215~223
The internal corrosion of water distribution systems is the main cause for the problem of the public health threat as well as water leakage in the damaged pipeline, red water, and odor and taste of the tap water. This study was examined the effect of chemicals used for pH and alkalinity control and corrosion inhibitors for producing the optimal corrosion control method. Corrosion study at different pH and alkalinity indicated that these control using alkaline chemicals was effective in corrosion rate, Fe release reduction, but examined to be increased in turbidity and corrosion-by-products(TTHMs) problems. The turbidity was slightly increased, requiring caution in controlling corrosion with
. At pH 9.0, TTHMs concentration is increased two times corn pared with non-control of pH. Using the pipe which had experienced 28 years of exposure, iron release was decreased with the corrosion inhibitor. Consequently, pH, Alkalinity control method using alkaline chemicals must be complemented by corrosion inhibitor application for efficient corrosion control.
Characteristics of Electricity Production from Volatile Fatty Acids Using a Microbial Fuel Cell
Noh, Jung-bin ; Hwang, Yong-woo ; Bae, Jae-ho ; Moon, Jin-young ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 225~234
Characteristics of electricity production from major fermentation products (acetate, propionate and butyrate) were evaluated in a microbial fuel cell (MFC). For each substrate, batch and continuous experiments were performed. The batch test result indicated that coulombic efficiency depended on the resistance connected in MFC circuit. With acetate, coulombic efficiency were 87% at
, but decreaced to 45% at
. In continuous tests, maximum power densities obtained was 220 Q with acetate. The maximum power densities of butyrate, acetate and propionate were 6.8, 6.1, and
, respectively. Propionate and butyrate were converted into acetate producing high currents.
produced during butyrate and propionate probably used to produce electricity. In conclusion, butyrate conversion into acetate was faster than that of propionate with higher electricity production. If the production of propionate is inhibited during fermentation, anaerobically fermented liguor may be effectively applied for MFC.
Application of Pore-controllable Fiber Filter(PCF) as a Pretreatment for Water Treatment Process
Lee, Chul-Woo ; Lee, Byung-Goo ; Lee, Il-Kuk ; Lee, Shun-Hwa ; Bae, Sang-Dae ; Kang, Lim-Seok ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 235~244
A PCF(Pore Controllable Fiber Filter) process was applied as a pretreatment of water treatment for reduction of turbidity. The experimental results obtained from the PCF showed that the removal efficiency of turbidity without coagulation was around over 70 percent. However, the removal efficiency of turbidity by the coagulation-PCF process was high as much as over 95%. Thus, the coagulation pretreatment was required for the better operation of the PCF. The SEM (Scanning Electron Microscope) images of fiber before and after filtration showed that the filtration mechanism of PCF filter is both controlling attachment mechanism and Sieving mechanism through fiber pore. For the coagulation-PCF process, optimum dosage of coagulant was needed for the economical operation, and for this, determining the optimum dosage by using a filter column test. Also only 16mg/L of alum was used to obtain high algae removal efficiency over 90%. Therefore, it can be concluded that coagulation-PCF process is very effective pretreatment process for algae removal.
Evaluation of Floc Formation Conditions for Increasing Flotation Velocity in DAF Process
Kwon, Soon-Buhm ; Min, Jin-Hee ; Park, No-Suk ; Ahn, Hyo-Won ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 245~255
Dissolved air flotation is a solid-liquid separation system that uses fine bubbles rising from bottom to remove particles in water. In order to enhance the flotation velocity and removal efficiency of flocs in the flotation process, we tried to obtain pretreatment conditions for the optimum DAF process operation by comparing and evaluating features of actual floc formation and flotation velocity etc, according to coagulant types and conditions for flocculation mixing intensity by using PIA, PDA, and FSA. Accordingly, generating big flocs that have low density at low flocculation mixing intensity may reduce treatment efficiency. In addition, generating small flocs at high flocculation mixing intensity makes floc-bubbles smaller, which reduces flotation velocity, In this study, it was found that high flocculation mixing intensity could not remove the remaining micro-particles after flocculation, which had negative effects on treated water quality, Therefore, in order to enhance treatment efficiency in a flotation process, flocculation mixing intensity around
Evaluation of CIA(Conventional Intermittent Aeration) and MIA(Modified Intermittent Aeration) in Membrane Submerged Advanced Wastewater Treatment Process
Seo, In-Seok ; Kim, Yeon-Kwon ; Kim, Ji-Yeon ; Kim, Hong-Suck ; Kim, Byung-Goon ; Choi, Chang-Gyu ; Ahn, Hyo-Won ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 257~264
In this study, the treatment of domestic wastewater in a field-scale membrane submerged intermittently aerated activated sludge process(
) was investigated under difference aeration methods. Operating temperature was 5.4 to 25.0 and membrane used in this study is a polyethylene hollow fiber membrane(pore size
). The range of operating flux was
and membrane permeates periodically operated for 7min followed idle for 3 min. The results showed that MIA(modified intermittent aeration) was more efficient in nitrogen and phosphorus removal. The removal efficiencies of T-N and T-P were 73.0% and 69.6% for CIA(conventional intermittent aeration) and 57.5%, 58.6% for MIA (modified intermittent aeration). With application of modified intermittent aeration, DO reached nearly Omg/l within 10 minutes after air off. Organics of influent could be entirely consumed to the denitrification and the P-release without the influence by remained DO in intermittent aeration reactor. Therefore, newly developed KSMBR(Kowaco-KMS-Ssangyoung Membrane Bio-Reactor) process with modified intermittent aeration can be one of the useful process for stable nitrogen and phosphorus removal.
The Effect of Column Height on Sludge-Water Interface Height Change Model
Park, Suk Gyun ; Kang, Seon-Hong ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 265~272
While sludge settles down in a column, sludge settling characteristic is influenced by effect parameters, interparticle force, wall effect etc. As the height of a column changes, the settling velocity of sludge-water interface changes, too. At lower sludge concentration, particular effect was not observed by the difference of column height, however it was observed that settleability of sludge was greatly influenced by column height when sludge settling was poor or sludge concentration was high. It is therefore required to consider the effect of column height when the power model for sludge interface settling is established. In the tests, there was hardly any
(SVI after "t" minutes) difference in each column after 10min at
of sludge concentration. When sludge concentration was at
tended to be constant after 20min. At
increased to 30minuets. The purpose of this work is to establish the correction factor that is able to compensate the errors derived from each different height of column.
The Effect of Sludge Settleability on the Performance of DNR Process
Suhl, Chang-Won ; Lan, Thi Nguyen ; Jeong, Hyeong-Seok ; Lee, Sang-Min ; Lee, Eui-Sin ; Shin, Hang-Sik ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 273~280
The sludge settleability is a key factor for operating activated sludge process as well as BNR (biological nutrient removal) process, because the poor sludge settling causes an increase of suspended solid in the effluent. In order to improving the sludge settleability, a settling agent such as iron dust can be applied. In this study, the effect of sludge settleability on the performance of DNR (Daewoo nutrient removal) process was investigated with GPS-X, which is the popular wastewater treatment process model program, and the result of modeling was verified with operating lab-scale DNR process. As a result, if the sludge blanket keeps stable in the secondary settling tank, the effluent quality is similar in spite of different SVI values. And in case of the good sludge settleability, short HRT or long SRT increased the biomass concentration in the bioreactor, and improved the pollutant removal efficiency. In spite of daily influent changing, the good sludge settleability also guaranteed the stable effluent quality. And the results of the lab-scale DNR process experiment could support the simulated results.
Statistical Analysis of Chlorine Residual in Korean Drinking Water
Sohn, Jinsik ; Kang, Hyosoon ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 281~287
Maintaining adequate chlorine residual is crucial in water treatment facilities, Treatment technique, newly promulgated regulation, requires sufficient disinfection in order to control more resistant microorganisms such as Viruses and Giardia lamblia. Each water treatment plant should report various water qualities including chlorine residual and disinfection by-products, thus plenty of data has been generated. Even though statistical analysis using these data are forced to investigate the status and effect of water qualities in water facilities very few researches have been performed in korea. This study performed statistical analysis of chlorine residual during three years in Korean drinking water. The average chlorine residual concentrations were 0.701mg/L, 0.738mg/L, 0.763mg/L in 2002, 2003, 2004, respectively. Monthly variations of chlorine residual was not significant. ANOVA result showed that yearly variance of chlorine residual is different in only less than
of water treatment capacity. The statistical analysis can help government to establish new regulation with scientific basis.
Pilot Scale Test of Non-woven Fabric Filter Separation Activated Sludge Process for Practical Application on Domestic Wastewater Reclamation
Lee, Sang-Woo ; Choi, Chul-hoi ; Park, Young-mi ; Seo, Gyu-Tae ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 289~294
A pilot scale non-woven fabric filter separation activated sludge system was investigated for practical application on domestic wastewater reclamation and reuse. The system was operated in A/O (Anaerobic/Oxic) process with submerged filter module in the aerobic compartment. In the test of two types of filter materials (
), the initial flux (0.42m/d) could be maintained for about three months by regular air backwashing of
filter at 0.3m water head. The removal efficiency of organic matter by the system was BOD 93.3%, CODcr 96.3%, SS 96.7%. The effluent quality was 7.8mg/L, 12mg/L and 5mg/L for BOD, CODcr and SS, respectively. The water quality was enough to meet a standard for domestic reuse without human contact. T-N removal efficiency was 49.9% at internal recycle rate 2Q and C/N ratio 3.3. The removal efficiency of T-P was 50% with average effluent concentration, 2.6mg/L.
Application of Particle Size Analysis to Predict the Settleability of CSO Pollutants
Yoon, Hyun Sik ; Lee, Doojin ; Park, Young Suk ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 295~302
Over the past decades, a flocculation and/or sedimentation process have been adopted to remove pollutants from CSOs. It has been learned that major factors affecting settlement of pollutants are the particle size distribution, their settling velocities and their specific gravity. It is, therefore, a good idea to analyze the particle size distribution and settleability of CSOs pollutants in order to develop details in designing a process. Discussed in this study are pollutant characteristics of CSOs such as particle size distribution and settleability of pollutants. The power law function is applied and is found to be an effective and reliable index for expressing the particle size distribution of pollutants in CSOs. Based on the regression analysis it is observed that the derived constants of curves representing settling velocity profile are proportional to the initial concentration of particles and to the
-values of power law distributions.
A Study for Application of DAF Technology to Remove Chrolophyl-a and Dissolved Organic Compound in Yongdam Reservoir
Dockko, Seok ; Lee, Hyungjib ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 303~309
Yongdam reservoir located in Jeoliabuk-do has had a lot of concerns for its algal blooming since it has started to fill water. Many water utilities near Yongdam area use reservoirs even though they have some problems with certain algae that cause tastes and odors and clog filters. In this research, dissolved air flotation (DAF) technology was examined for feasibility for removal of algae. OAF can save the capital cost for its compactness, because its hydraulic loadings (overflow rates) are 10 times higher than sedimentation, and hydraulic detention times are much shorter, typically 5 to 15 minutes. As a result of this research, PAC is effective rather than Alum to DAF for pretreatment. Higher DOC plays an important role to change zetapotential negatively to inhibit destabilization of particle to coagulation. The length of pipeline to carry pressurized water into reactor does not affect reaction.
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 311~311
상하수도학회지 투고 규정
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 312~312
논문 투고 요령
Journal of Korean Society of Water and Wastewater, volume 20, issue 2, 2006, Pages 313~313