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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Environmental Engineers
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Journal DOI :
Korean Society of Environmental Engineering
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Volume & Issues
Volume 32, Issue 12 - Dec 2010
Volume 32, Issue 11 - Nov 2010
Volume 32, Issue 10 - Oct 2010
Volume 32, Issue 9 - Sep 2010
Volume 32, Issue 8 - Aug 2010
Volume 32, Issue 7 - Jul 2010
Volume 32, Issue 6 - Jun 2010
Volume 32, Issue 5 - May 2010
Volume 32, Issue 4 - Apr 2010
Volume 32, Issue 3 - Mar 2010
Volume 32, Issue 2 - Feb 2010
Volume 32, Issue 1 - Jan 2010
Selecting the target year
Development of Asset Management System in Water and Wastewater Pipeline
Hwang, Hwan-Kook ; Han, Sang-Jong ; Chong, Yon-Kyu ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1069~1075
Feasibility of Present Soil Remediation Technologies in KOREA for the Control of Contaminated Marine Sediment: Heavy Metals
Kim, Kyoung-Rean ; Choi, Ki-Young ; Kim, Suk-Hyun ; Hong, Gi-Hoon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1076~1086
Soil remediation technologies were experimented to evaluate whether the technologies could be used to apply remediation of contaminated marine sediment. In this research, marine sediments were sampled at "Ulsan" and "Jinhae" where remediation projects are considered, and then the possibility of heavy metal removal was evaluated throughout the technologies. Heavy metal concentration of silt and clay fraction was higher than that of sand fraction at "Ulsan". Heavy metal removal of the silt and clay fraction was arsenic (As) 81.5%, mercury (Hg) 93.8% by particle separation, cadmium (Cd) 72.2%, mercury (Hg) 93.8% by soil washing technology, cadmium (Cd) 70.8%, lead (Pb) 65.6% by another soil washing technology. Based on experimental results, tested particle separation and soil washing technologies could be used to remove heavy metals of sand fraction and silt and clay fraction. Heavy metal removal by soil washing technology which was composed of separation, washing and physical or chemical reaction by additives such as acid, organic solvents was more effective comparing to that of particle separation. Since heavy metal concentration of all treated samples was suitable for national soil standards, all the tested technologies were could be used not only to remove heavy metals of marine contaminated sediment but also to reuse treated samples in land.
Evaluation of Design and Operation Parameters for a Spherical Sulfur Denitrification Reactor Treating High Strength Municipal Wastewater
Kim, Yong-Hak ; Chae, Kyu-Jung ; Yim, Seong-Keun ; Lee, Young-Man ; Bae, Woo-Keun ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1087~1093
Autotrophic denitrification is known as an effective and economical alternative for heterotrophic denitrification using external carbon sources such as methanol. In this study, we evaluated design and operation parameters for a sulfur denitrification reactor (SDR) treating high strength nitrogen wastewater. The SDR was filled with spherical sulfur media in connected to a pilot-scale nutrient removal process (daily flow rate,
) using moving spongy media. Total nitrogen (TN) concentration of the final effluent was below the 7.0 mg TN/L because nitrate was additionally removed through autotrophic denitrificationin without adding alkalinity (initial alkalinity was
/L). During the test period, 60~80% of nitrogen in the influent was removed even in low temperature (below
). The alkalinity consumption for nitrate removal in SDR was
-N, and the residual alkalinity of influent of SDR was higher than that of theoretical requirements for full conversion of nitrate. The consumption of sulfur was 943.8 g S/d and it was 2.4 times higher than theoretical value (400.1 g S/d) due to abrasion and loss of sulfur media in backwash, etc.
Distribution of Electrochemically Active Bacteria in the Sediment
Son, Hyeng-Sik ; Son, Hee-Jong ; Kim, Mi-A ; Lee, Sang-Joon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1094~1101
Microbial fuel cells (MFC) were enriched using sediment Nakdong river, Hoidong river and protected water area in Gijang. The microbial community of sediment and enriched MFC was analyzed by FISH (fluorescent in situ hybridization) and 16S rDNA sequencing.
-Proteobacteria, Acidobacter and Cyanobactia group were dominant in sediment by FISH. The coulombs of the final 10 peak of the 3 MFC (Nakdong, Hoidong, Gijang) were 0.64 C, 0.50 C, 0.61 C, respectively. When MFCs were enriched by sediment,
-Proteobacteria, Acidobacter and Firmicutes group increased 45~90%, 50~90%, 40~80% and 45~125%, respectively. In results of 16S rDNA sequencing, Roseomonas sp., Azospillium sp., Frateuria sp., Dyella sp., Enterobacter sp. and Deinocossus were isolated from Nakdong river and Azospillium sp., Delftia sp., Ralstonia sp., Klebsiella sp. and Deinococcus sp. were isolated from protected water area in Gijang and Pseudomonas sp., Klebsiella sp., Deinococcus sp., Leifsonia sp. and Bacillus sp. were isolated from Hoidong river.
Application of Geo-Statistic and Data-Mining for Determining Sampling Number and Interval for Monitoring Microbial Diversity in Tidal Mudflat
Yang, Ji-Hoon ; Lee, Jae-Jin ; Yoo, Keun-Je ; Park, Joon-Hong ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1102~1110
Tidal mudflat is a reservoir for diverse microbial resources. Microbial diversity in tidal mudflat sediment can be easily influenced by various human activities. It is necessary to take representative samples to monitor microbial diversity in tidal mudflat sediments. In this study, we analyzed the microbial diversity and chemical characteristics of vegetation and non-vegetation tidal mudflat regions in the Kangwha tidal mudflat using geo-statistics and data-mining. According to the geo-statistical analysis, most correlation range values for the vegetation region were smaller than those for the non-vegetation region, which suggested that the shorter number and interval of sampling are required for the vegetation tidal mudflat environment due to its higher degree of chemical and biological complexity and heterogeneity. The data-mining analysis suggested that the organic content and nitrate were the major environmental factors influencing microbial diversity in the vegetation region while pH and sulfate were the major influencing factors in the non-vegetation region. Using the geo-statistical and data-mining integration approach, we proposed a guideline for determining the sampling interval and number to monitor microbial diversity in tidal mudflat.
A Study on the Particle Behavior in Turbulent Pulverized Coal Flame
Hwang, Seung-Min ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1111~1118
Combustion measurements based on optical techniques have recently become of major interest as tools not only for clarifying the combustion mechanism but also for validating the computational results for the combustion fields. In this study, the particle behavior in turbulent pulverized coal flame are investigated using advanced optical diagnostics. A laboratory-scale pulverized coal combustion burner is specially fabricated as open type in order to apply various optical measurement techniques. The detailed particle behavior is performed by LDV (laser Doppler velocimetry) and SDPA (shadow Doppler particle analyzer). It is observed that the particle mean diameter increase as the distance from burner increases, and this is found to be caused by the decrease of small particles' diameter and increase of large particles' diameter. This is because of result in the char reaction and the particle swelling due to devolatilization, respectively. The size-classified streamwise velocities of pulverized coal particles in the central region of the jet show the same magnitude, whereas those in the outer region are different depending on the particle size. The results show that the velocity and size-classified diameter of the pulverized coal particles in the flame can be measured well by SDPA.
Sludge Pre-Treatment by Hydrodynamic Cavitation-I: Optimization of Pre-Treatment System
Maeng, Jang-Woo ; Lee, Eun-Young ; Bae, Jae-Ho ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1119~1125
Most of the sludge pre-treatment methods to improve the anaerobic digestibility of sludge are not practied in the fields with low economical efficiency. The venturi cavitation system (VCS) adopting hydrodynamic cavitation is simple and requires low energy. This research was conducted to investigate the optimum design and operating conditions of the VCS. The experimental results indicated that the optimum number of venturi in series was three, and the suction mode operation of the pump yielded 1.6 times higher pre-treatment efficiency per unit energy consumption than the discharge mode. The combination of venturies with different throat sizes did not affect the pre-treatment efficiency. Also, the parallel installation of the three in series venture unit yielded 30% higher pre-treatment efficiency per unit energy consumption than the single unit. Under parallel conditions, the solubilization efficiency was 5.6 mg
TS/kWh, which is higher than the previously reported value.
Transient Behaviors of a Two-Stage Biofilter Packed with Immobilized Microorganisms when Treating a Mixture of Odorous Compounds
NamGung, Hyeong-Kyu ; Shin, Seung-Kyu ; Hwang, Sun-Jin ; Song, Ji-Hyeon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1126~1133
A two-stage biofilter was constructed and utilized to determine the removal efficiency when treating dynamic loading of a mixture of odorous compounds including benzene, toluene, p-xylene, ammonia and hydrogen sulfide. A yeast strain, Candida tropicalis, and a sulfur oxidizing bacterial (SOB) strain, Acidithiobacillus caldus sp., were immobilized in polyurethane media and packed in the two-stage biofilter. The experiment of dynamic loading variation was composed of (1) stepwise loading variation of all the odorous compounds (total EC test), (2) stepwise loading variation of each odorous compound, and (3) intermittent loading variation with 2-day-off and 3-day-on. The total EC test showed that the maximum elimination capacity was
for total VOCs, and 5.2 and
for ammonia and hydrogen, respectively. In addition, the inhibition between VOCs was observed when the loading of each individual VOC was varied. Especially the stepwise increase in toluene loading resulted in decreases of benzene and p-xylene removal efficiencies about 30% and 25%, respectively. However, the inhibition between organic and inorganic compounds was not observed. The intermittent loading variation with 2-day-off and 3-day-on showed that greater than 95% of the overall removal efficiency was restored in two days after the loading resumed. Consequently, the two-stage biofilter packed with immobilized microorganisms showed advantages over conventional biofilters for the simultaneous treatment of the mixture of organic and inorganic odorous compounds.
Study on the Removal of Pharmaceuticals and Personal Care Products and Microorganism Inactivation by Ozonation
Kim, Il-Ho ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1134~1140
Ozonation is a promising process that can effectively reduce the occurrence of micropollutants and pathogen in water. This study investigated the performance of ozonation for the removal of pharmaceuticals and personal care products (PPCPs) in secondary effluent from wastewater treatment plant. Moreover, the disinfection potential of ozonation applied for PPCPs removal was discussed. Secondary effluent filtered by sand filter was used for tested water, and ozonation was performed under 2, 4 and 6 mg/L of ozone doses. As a result, 6 mg/L of ozone dose (ozone consumption : 4.4 mg/L) was essential for the effective removal of 37 PPCPs in tested water. Several previous studies showed that the operation condition could achieve approximately 3 log inactivation of total coliform and enteroviruses. On the other hand, dissolved ozone concentration in tested water increased by 1.8 mg/L under 6 mg/L of ozone dose, probably resulting in the increase of bromate formation potential. This result implies that as alternatives to suppress the bromate formation potential during the oxidation of PPCPs by ozone, investigations on advanced oxidation processes are required.
Disinfection Efficiency of Medium Pressure UV Lamp on Major Bacteria in Sand Filtered Water
Ahn, Seoung-Koo ; Yang, Yoon-Yong ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1141~1146
Isolated the heterotrophic aerobic bacteria in sandfiltered water on NA and TSBA solid medium, selected 8 dominant species and identified by Sherlock System. Each samples are irradiated 0, 5, 16, 40 and
using on CBD (Collimated Beam Device) Medium Pressure UV lamp after these identified bacterium did liquid culture how to make
suspended in dilution water. Then cultured bacteria are estimated inactivation rate on plate media. Identified Gram positive group are Bacillus Subtilus, Bacillus megaterium, Rhodococcus erythropolis and Microbacterium laevaniformans; Gram negative group are Pseudomonas vesicularis, Pseudomonas pseudoflava, Alcaligenes paradoxus and Zooglea ramigera. These isolation of bacterium are more stronger reference strain and high resistance of MP UV irradiation, Besides Gram negative bacterium are more sensitive Gram positive bacterium on MP UV dose. Now we are estimating to
MP UV dose for efficient disinfection in water treatment plant.
The Effect of Initial pH and Dose of
on Chloroform Removal in Photocatalytic Process using Compound Parabolic Concentrator Reactor System
Cho, Sang-Hyun ; Cui, Mingcan ; Nam, Sang-Geon ; Jung, Hee-Suk ; Khim, Jee-Hyeong ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 12, 2010, Pages 1147~1153
To evaluate the solar photocatalytic degradation efficiency of chloroform in a real solar-light driven compound parabolic concentrators (CPCs) system,
was irradiated with a metalhalide lamp (1000 W), which has a similar wavelength to sunlight. The results were applied to a pilot scale reactor system by converting the data to a standardized illumination time. In addition, the effects of initial pH and the
dose on the photocatalytic degradation of chloroform were investigated. The results were compared with the specific surface area (S.S.A) and particle size of
, which changed according to the pH, to determine the relationship between the S.S.A, particle size and the photocatalytic degradation of chloroform. The experiment was carried out at pH 4~7 using 0.1, 0.2, 0.4 g/L of
. The particle size and specific surface area of
were measured. There was no significant difference between the variables. However, pH affects the particle size distribution and specific surface area of
. Inaddition, the activation of a photocatalyst did not show a linear relationship with the specific surface area of
in the photocatalytic degradation of chloroform.