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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Environmental Engineers
Journal Basic Information
Journal DOI :
Korean Society of Environmental Engineering
Editor in Chief :
Volume & Issues
Volume 27, Issue 12 - Dec 2005
Volume 27, Issue 11 - Nov 2005
Volume 27, Issue 10 - Oct 2005
Volume 27, Issue 9 - Sep 2005
Volume 27, Issue 8 - Aug 2005
Volume 27, Issue 7 - Jul 2005
Volume 27, Issue 6 - Jun 2005
Volume 27, Issue 5 - May 2005
Volume 27, Issue 4 - Apr 2005
Volume 27, Issue 3 - Mar 2005
Volume 27, Issue 2 - Feb 2005
Volume 27, Issue 1 - Jan 2005
Selecting the target year
Characteristics of Transformation Process of Wastewater in Sewer
Lee, Doo-Jin ; Kim, Moon-Il ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 911~916
In this study, variations of water quality, sediment size and contaminant substances are analyzed at upstream and downstream in sewer systems in order to evaluate the characteristics of wastewater transformation by physico-chemical and biological reactions. The differences of DOC concentration between up and down stream showed the range of
from the result of continuous measurement at up and down stream. About 8.4% of DOC concentration was reduced and reduction rate was 2.3 mg/L/km. SS reduction rate was measured by 5.5 mg/L/km, 0.22 mg/L/min from upstream to downstream, which was twice than DOC reduction rate. When pollution load reduction was evaluated considering infiltration/inflow effect, DOC load was eliminated from 1,230 ka/d to 1,167 kg/d by physi-chemical and biological reaction in a sewer and 7.8% of the SS in upstream station was reduced under dry weather condition. The results showed that the characteristics of transformation process of wastewater in sewer should be considered for design and operation of wastewater treatment plant.
Treatment of Refractory Organics in Dyeing Wastewater by Using Cell Immobilized Pellets
Han, Duk-Gyu ; Bae, Woo-Keun ; Cho, Young-Jin ; Won, Ho-Shik ; Lee, Yong-Woo ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 917~922
The wastewaters from textile and dyeing industries are difficult to treat due to its high pH, temperature, color intensity and non-biodegradable organic contents. This study investigated the removal of recalcitrant organics in a dyeing wastewater by using a packed bed reactor (PBR) that contained cell-immobilized pellets. The feed, obtained from an effluent of a biological treatment plant, had
of 330 mg/L and
of 20 mg/L on average. In immobilizing the cells to a Polyethylene Glycol(PEG) based medium, activated sludges from either a sewage treatment plant or an industrial wastewater treatment plant were used. When the empty bed contact time (EBCT) was above 8 hrs in the PBR, the
removal efficiency was over 50% and the
concentration was 72 mg/L or lower on average, which was substantially lower than the discharge standard of 90 mg/L. The results indicated that the optimum EBCT in the PBR was 8 hrs. The PBR with cell-immobilized pellets was effective as an advanced treatment process after an activated sludge process for treating dyeing wastewaters.
The Effects of Mean Grain Size and Organic Matter Contents in Sediments on the Nutrients and Heavy Metals Concentrations
Kim, Seog-Ku ; Lee, Mi-Kyung ; Ahn, Jae-Hwan ; Kang, Sung-Won ; Jeon, Sang-Ho ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 923~931
A study was carried out to identify the major causes of sediments pollution in the Paldang Lake in the vicinity of Gyeongan river. Samples from 40 sites were collected and analyzed to characterize the regional distributions of grain size, organic matter contents, and concentrations of T-N, T-P and heavy metals. contaminations. The mean grain size(Mz) ranged from sand type(Mz,
) where Bukhan River and Namhan River converges at a high flow rate to silt type(Mz,
) at the downstream of Gyeongancheon and Paldang lake, reflecting the water circulation in the area. Except sampling point St. 36 near the wetland, the determination coefficient(
) of Mz and organic matter(LOI) was 0.88, showing that more organic matters are concentrated inside finer sediments. The concentrations of T-N and T-P in sediments were higher in the area at which Mz and organic matters are also higher. High concentrations of T-P analyzed in the sediments, ranging from
) could be considered as a critical level. Adsorbed-P and NAI-P, which are easily released to the surrounding environments when physico-chemical characteristics of sediments are changed, was found to be around 20%, which was showed by the result of fractionated-P. Moreover, Principle Component Analysis(PCA), showed that high concentrations of T-N, T-P, organophilic metals (Cd, Cu, Pb, Zn) are distributed in the areas where high organic matter contents and fine grain-sized sediments are found. However, results of
(Geoaccumulation Index) that considers the grain size of sediments showed that heavy metal concentrations in the lake was low enough to be considered as Class 1 indicating the relative degree of pollution was less than zero.
A Study OH the Character and Activity of
Photocatalysts Prepared With Various Condition
Kim, Seung-Min ; Youn, Tae-Kawun ; Hong, Dae-Il ; Kim, Sung-Kuk ; Park, Sang-Won ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 932~938
] nanoparticles were prepared from the precipitation in
and the sol-gel profess in
as starting materials with various synthetic conditions. The samples were characterized by XRD, SEM, and TEM testing techniques. The photocatalytic degradation of congo red has been investigated in
process to evaluate photocatalytic activities for the samples.
nanoparticles calcined at
had the best photocatalytic activity with the rate constant of the degradation of congo red as
. The rate constant of
photocatalysts was increased with the calcination temperature under
and decreased with the calcination temperature upper
. In the case of
photocatalysts, the photocatalytic activity wasn't greatly affected by the frequencies of usage. In the similar synthesis condition, the degradation efficiency of the
particle prepared by
was increased to 8.8%, when the rate was compared with the sample prepared by
. The photocatalytic activities of
photocatalysts synthesized by
with various conditions were also discussed.
Photocatalytic Degradation of Phenol in
Park, Kil-Soon ; Kim, Jong-Hwa ; Lee, Sang-Wha ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 939~945
The Photocatalytic activity was investigated with the increase of flow rate in a
packed-bed system. The rate of phenol degradation over
(dia. = 5 mm) was increased up to 300 mL/min and reached a plateau beyond 400 mL/min. The bead photocatalysts did not exhibit a distinct difference of the phenol degradation rate irrespective of corrosion rates of glass beads and
coating amounts. Degussa P25 exhibited a higher photocatalytic activity in comparison to other
sols(Ishihara & N). The performance(activity and durability) of
packed-bed system can be enhanced by the use of
-coated glass beads instead of granular types that is easily attrited by the shearing force of flowing fluids.
Preliminary Study on Desizing and Dyeing Using Low Temperature Plasma
Bae, Paek-Hyun ; Jo, Hun-Je ; Kim, Hyo-Jin ; Lee, Yeon-Hee ; Park, Sung-Min ; Kim, Jeong-Gyu ; Jung, Jin-Ho ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 946~951
In this wort plasma treatment was evaluated as an alternative clean desizing technology. Size materials such as PVA(polyvinyl alcohol), PACL(polyacrylic acid esters) and their mixture on PET(polyethylene terephthalate) fabrics were treated by
plasma was more efficient in size removal than
plasma, and the removal of PVA was higher than that of PACL. SEM(scanning emission microscopy) pictures of the plasma treated samples directly proved the disappearance of sizing agents. After
plasma treatment, the PET fabrics were subjected to conventional desizing process. Compared with untreated fabrics, the desizing effluent from the treated fabrics gave lower TOC, COD and
values. This indicates plasma treatment not only serves to directly remove sizing agents but also offered several advantages by changing the chemical properties of sizing agents. Lastly, the effect of plasma desizing process on dyeing was examined using color difference and dyeing fastness tests. The CCM(computer color matching) results showed rotor difference between PET fabric desized by
plasma treatment for 20 min and reference PET fabric desized by the conventional wet desizing process was around 1. This suggests the treated PET fabric can be directly subjected to dyeing process without any additional process. The plasma treated fabric also gave a good result of dyeing fastness so that grades of laundering, crocking, heat and light fastness were same or even better than the reference PET fabric did.
A Sensitivity Analysis of Cell Size on a Distributed Non-Point Source Pollution Model
Bae, In-Hee ; Park, Jung-Eun ; Park, Seok-Soon ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 952~957
A sensitivity analysis study was performed to examine the effects of cell size on a distributed non-point source pollution model. The model, AnnAGNPS, whiff is a modified version of USDA's AGNPS, was applied to Eung stream watershed, a tributary of Cheongmi stream located in the South Branch of Han River System. The model components and results, such as channel length, slope, land use, and delivery ratio, were analyzed according to the various cell sizes from 10 to 200 ha. As cell sire increases, channel length decreases due to short-circuiting of meandering creek. The decreased channel length has more significant effects on the model results than any other geomorphological change. When the effects of land use and soil distribution are excluded, sediment delivery loads increase due to shorter time to reach the outlet of the watershed in larger tell size. When those effects are included, however, sediment delivery loads decrease in larger fell size because the variety of land use types can not be inputted. The predominant land use in the applied watershed is forest with very low soil erosion such that the predicted sediment delivery might be much lower than real system. The cell size of 30 ha was determined to produce the most appropriate resolution. Surface runoff and non-point source loads of TN, TP and BOD were predicted and the results agree well with the field measurements. From this study, it was shown that the model results would be very dependent on variations of topography, land use, and soil distribution, as a function of cell size, and the optimum cell size is very important for successful application of distributed non-point source pollution model.
The Effects of Cadmium or Copper on Biological Hydrogen Production
Yoon, Woo-Hyun ; Lee, Tae-Jin ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 958~964
Experiment was conducted to investigate the amount of hydrogen gas and the characteristics of organic acids production from various carbohydrates by anaerobic bacteria. The variation characteristics of organic acids and hydrogen gas production at the fermentative culture were also studied in the presence of heavy metals such as cadmium or lopper. 3.43 mole hydrogen per mole of hexose was produced when sucrose was used as a carbon source. Acetic acid and butyric acid were main products by the anaerobic fermentation. Hydrogen production rate was decreased and formation of acetic acid was increased as the concentration of heavy metals was increased in the medium. The inhibition of hydrogen production by the copper was more serious than the cadmium.
Effect of Current Density and pH of Electrolyte on Anion-Exchange Membrane Fouling
Choi, Jae-Hwan ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 965~969
Current density is an important operating parameter in the ion-exchange membrane process. We observed the effects of fouling of a Neosepta AMX anion-exchange membrane(Tokuyama Soda, Japan) in 0.02 M NaCl solution containing 100 mg/L sodium humate. Membrane fouling was analyzed by measuring the change in the electrical resistance in the under- and over-limiting current density regions. The experimental results found that membrane fouling was negligible at under-limiting current densities, but was increased significantly when an over-limiting current was supplied. After the fouling experiments, the current-voltage curves for the fouled membranes were measured. From the curves, we observed increased electric resistance and reduced limiting current density(LCD), caused by the accumulation of humic acid on the membrane surface. Furthermore, membrane fouling increased as the acidity of the electrolyte solution containing humic acid increased. This occurred because the fouling of an anion-exchange membrane is affected more by the physicochemical properties of the humic substance than by the surface charge of the humate.
Remanufacturing of Commercial
Catalyst used in the SCR Process of Incinerator
Yoon, Goan-Gu ; Yoo, Man-Sik ; Lim, Jong-Sun ; Kim, Tae-Won ; Park, Hea-Kyung ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 970~977
catalysts which had been exposed to the off gas from incinerator for a long time were remanufactured by washing with distilled water and arid solution and reimpregnation with catalytic active components(
). The catalytic properties and NOx conversion reactivity of those catalysts were examined by analysis equipment and NOx conversion experiment. Under the experimental condition used in this study, the remanufactured catalysts activated by distilled water ultra sonic cleaning, the catalytic activity was recovered in the range of
of that of the fresh and the maximum activity was showed when the ultra sonic cleaning time was more than 3 minutes. The remanufactured catalysts by acid solution ultra sonic cleaning, the catalytic activity was recovered in the range of
of that of the fresh catalyst and the maximum catalytic activity was shooed when the pH of the acid solution was 5. The remanufactured catalysts by reimpregnation with
, the catalytic activity was recovered in the range of
of that of the fresh catalyst. Maximum catalytic activity was showed when the
was reimpregnated more than 1.0 wt %. In this case, the catalytic activity was recovered 97% of that of the fresh catalyst especially at the
of the experimental temperature.
A Three-Dimensional Modeling Study of Lake Paldang for Spatial and Temporal Distributions of Temperature, Current, Residence Time, and Spreading Pattern of Incoming Flows
Na, Eun-Hye ; Park, Seok-Soon ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 978~988
A three-dimensional dynamic model was applied to Lake Paldang, Han River in this study. The model was calibrated and verified using the data measured under different ambient conditions. The model results were in reasonable agreements with the field measurements in both calibration and verification. Utilizing the validated model, we analyzed the spatial and temporal distributions of temperature, current, residence time, and spreading pattern of incoming flows within the lake. Relatively low velocity and high temperature were computed at the surface layer in the southern region of the Sonae island. The longest residence time within the lake was predicted in the southern region of the Sonae island and the downstream region of the South Branch. This can be attributed to the fact that the back currents caused by the dam blocking occur mainly in these regions. Vertical thermal profiles indicated that the thermal stratifications would be occurred feebly in early summer and winter. During early spring and fall, it appeared that there would be no discernible differences at the vertical temperature profiles in the entire lake. The vertical overturns, however, do not occur during these periods due to an influence of high discharge flows from the dam. During midsummer monsoon season with high precipitation, the thermal stratification was disrupted by high incoming flow rates and discharges from the dam and very short residence time was resulted in the entire lake. In this circulation patterns, the plume of the Kyoungan stream with smallest flow rate and higher water temperature tends to travel downstream horizontally along the eastern shore of the south island and vertically at the top surface layer. The model results suggest that the Paldang lake should be a highly hydrodynamic water body with large spatial and temporal variations.
Characteristics of Degradation of Humic Acid in GAC Adsorption, Ozone Alone, and Ozone/GAC Hybrid Process
Choi, Eun-Hye ; Kim, Kei-Woul ; Kim, Seog-Ku ; Rhee, Dong-Seok ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 989~994
The treatment efficiency and the degradation characteristics of humic acid were investigated in three processes-GAC adsorption, Ozone alone and Ozone/GAC hybrid process, in which
, DOC, molecular size distribution and surface change of GAC were evaluated. DOC removal rate in Ozone/GAC hybrid profess(ca. 80%) was higher than the arithmetic sum of Ozone alone(38%) and GAC adsorption(19%). This result approves that the combined Ozone/GAC hybrid process brings synergistic effects on DOC removal from the HA containing water.
decrease rate was also at the highest in Ozone/GAC hybrid process from the three processes. It may be interpreted that the granular activated carbon in Ozone/GAC hybrid process acts as not only an adsorbent but also a catalyst for ozonation, and futhermore offers an additional reaction site between adsorbed organic matter and ozone. In the study of molecular sire distribution, there was no significant change of molecular size distribution in the GAC adsorption process during the reaction time of 120 min. In Ozone alone process, the fraction of molecular size over 30 kDa was decreased a little at the beginning and left constant after 10 min. But in Ozone/GAC hybrid process, the molecules size over 30 kDa of HA was significantly decreased from 36.3% to 3.9%. And also the fraction of smaller molecular size below 0.5 kDa was increased from 4.8%(untreated HA) to 12.3%(in Ozone alone) and 40.1%(in Ozone/GAC) respectively at the reaction time of 120 min.
Investigation on Hydraulic Properties According to Artificial Recharge and Extraction
Kang, Jeong-Ok ; Lee, So-Jung ; Kim, Chang-Gyun ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 995~1005
The study with laboratory sandbox model has been carried out to address potential use of reclaimed water, as a countermeasure artificially recharging the coastal aquifer, to effectively prevent from seawater intrusion due to overexploitation. It also investigated plausibility for either preserving or recovering the freshwater interface facing with seawater intrusion. To do this, we assessed hydraulic properties in artificial aquifer seawater/freshwater interface) depending upon the variation of extraction, storage and injection of reclaimed water. The variation of interface between freshwater and seawater were visualized by Surfer 8(Golden Software, USA) according to given experimental conditions. The interface between seawater and freshwater has been sensitively influenced by the change of extraction rate, where seawater zone migrated much faster into freshwater zone even though extraction rate became decreased. However, decreasing recharge rate could slow down moving of saline water zone toward freshwater zone. When the recharge was solely introduced into the sand box model, saline water intrusion was retarded than those of recharge and extraction working together. And also, the level of salinity of saline water was diluted by artificial recharge. It finally revealed that the artificial recharge would hydraulically avoid seawater intrusion while the freshwater sources could be conservatively utilized.
The Effect of UV Intensity and Wavelength on the Photolysis of Triclosan (TCS)
Son, Hyun-Seok ; Choi, Seok-Bong ; Khan, Eakalak ; Zoh, Kyung-Duk ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 1006~1015
We investigated the effect of hydroxyl radicals on the photolysis of triclosan (TCS), which is a potent broad-spectrum antimicrobial agent. TCS degradation during the initial reaction time of 5 min followed a pseudo-first order kinetic model ai all light intensities at a wavelength of 365 nm and at the low light intensities at a wavelength of 254 nm. The photodegradation rate significantly increased with decreasing wavelength and increasing the UV intensities. The activity of hydroxyl radicals was suppressed when methanol was used as the solvent instead of water. An increase in the photon effect was observed when the UV intensity was higher than
at 254 nm, and lower than
at 365 nm. The quantum yield efficiency for the photolysis of TCS was higher at 365 nm than at 254 nm among the above mentioned UV intensities. Dibenzodichloro-p-dioxin (DCDD) and dibenzo-p-dioxin were detected as intermediates at both UV intensities of
at 365 nm. Dichlorophenol and phenol were also detected in all cases. Based on our findings, we presented a possible mechanism of TCS photolysis.
Identification of Bacteria Occurred Dominantly and Screening of Best VFAs Producing Bacteria in Food Waste Fermentation Process
Kim, Tae-Ho ; Cho, Hee-Kyung ; Song, Young-Hoon ; Ahn, Seoung-Koo ;
Journal of Korean Society of Environmental Engineers, volume 27, issue 9, 2005, Pages 1016~1021
We studied on screening and isolation of dominant bacteria in the food waste fermentation process and on effective production of VFAs by isolated bacteria. In the result of study, bacteria of twelve species were isolated by anaerobic medium. Among the 12 isolated species including Escherichia coli, Clostridium formicoaceticum, C. butyricum, C. acetobutyricum. E. coli and Clostridium spp. were occurred dominantly in the fermentation process and regarded as best VFAs producing bacteria. Acetic acid are produced 287 mg/gTS(8,176 mg/L) by E. coli in concentration of
, 551 mg/gTS(15,715 mg/L) by Clostridium formicoaceticum in concentration of
. Three times as much acetic acid were produced as blank. Butyric acid are produced 214 mg/gTS(6,106 mg/L) by C. butyricum in concentration of
and produced 254 mg/gTS(7,261 mg/L) by C. acetobutyricum of concentration of
. Two times as much butyric acid were produced as blank.