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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
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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
Study on the Characteristics of Air quality in the Classroom of Elementary School and Its Control Methods
Jeong, Ji-Won ; Lee, Hee-Kwan ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 311~322
The common life with modern urban residence, spending more than 80~90% of daily life in indoor environment, makes the importance of indoor air quality (IAQ) even higher. Many efforts have made to improve indoor air quality (IAQ), which requires those systematic approaches for field practice. A recent study reported that no general approach cannot be made for IAQ improvement due to the great deal of variety in different indoor environments. Those indoor spaces included in Korean IAQ regulation were classified based on their characteristics and the IAQ guideline was suggested for each group of indoor spaces. Apart from those indoor spaces, the classroom in elementary school has different characteristics. By introducing the systematic approaches, the elementary classroom was surveyed and analyzed to understand its characteristics in due IAQ consideration. Based on the characteristics, there are several IAQ control measures suggested, including ventilation operation, dust mat installation, and white board.
and airborne dust were monitored and analyzed in order to evaluate the effectiveness of each control measure to IAQ. It was found that the general level of
concentration was managed under the IAQ guideline by applying the ventilator operation. The ventilation was also effective to the fugitive airborne particulate in elementary classroom environment.
A Study on the Solubilisation of Excess Sludge using Microbubble Ozone
Lee, Shun-Hwa ; Jung, Kye-Ju ; Kwon, Jin-Ha ; Lee, Se-Han ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 325~332
This study was conducted with the experiment of solubilisation of excess sludge by microbubble ozone process. To improve ozone contact efficiency, microbubble ozones which its diameter were the avearge 30
, microbubble size less than 40
occupied about over 90% of all. In treating sludge using microbubble ozones, in case microbubble ozones are injected at microbubble ozone dosage of 0.34 g
SS or less regardless of sludge concentration, microbubble ozone consumption rate was found to be 100% with no emission of waste ozones. In treating sludges by each concentration, in case the initial SS concentration of sludge is set to 6,447 mg/L, 5,557 mg/L, 3,180 mg/L, 1,092 mg/L and 515 mg/L, the amount of removed SS tended to increase with increase in initial SS concentration for the same microbubble ozone dosage, and treatment of sludge with high initial SS concentration was effective in raising the oxidation efficiency of microbubble ozones. On the other hand, as a result of reviewing acid, alkali and microbubble ozone treatment as composite treatment of sludge, use of acid treatment for the pre-treatment of microbubble ozone was more effective than alkali treatment, and in case of treatment at microbubble ozone dosage 0.05g
SS with the concentration of sulfuric acid infused in the sludge, the amount of removed SS, 153.9 g, was 1.9 times more than 81.2 g the amount of single treatment of microbubble ozone.
Charaterization of Biomass Production and Wastewater Treatability by High-Lipid Algal Species under Municial Wastewater Condition
Lee, Jang-Ho ; Park, Joon-Hong ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 333~340
Wastewater treatment using algal communities and biodiesel production from wastewater-cultivated algal biomass is a promising green growth technology. In literature, there are many studies providing information on algal species producing high content of lipid. However, very little is known about adaptability and wastewater treatability of such high-lipid algal species. In this study, we attempted to characterize algal biomass production and wastewater treatability of high-lipid algal species under municipal wastewater condition. For this, four known high-lipid algal strains including Chlorella vulgaris AG 10032, Ankistrodesmus gracilis SAG 278-2, Scenedesmus quadricauda, and Botryococcus braunii UTEX 572 were individually inoculated into municipal wastewater where its indigenuous algal populations were removed prior to the inoculation, and the algae-inoculated wastewater was incubated in the presence of light source (80
) for 9 days in laboratory batch reactors. During the incubations, algal biomass production (dry weight) and the removals of dissolved organics (COD), nitrogen and phosphorous were measured in laboratory batch reactors. According to algal growth results, C. vulgaris, A. gracilis and S. quadricauda exhibited faster growth than indigenuous wastewater algal populations while B. braunii did not. The wastewater-growing strains exhibited efficient removals of total-N,
-N, Total-P and
-P which satisfy the Korea water quality standards for effluent from municipal wastewater treatment plants. A. gracilis and S. quadricauda exhibited efficient and stable treatability of COD but C. vulgaris showed unstable treatability. Taken together with the results, A. gracilis and S. quadricauda were found to be suitable species for biomass production and wastewater treatment under municipal wastewater condition.
A Numerical and Experimental Study for Fry-drying of Various Sludge
Shin, Mi-Soo ; Kim, Hey-Suk ; Kim, Byeong-Gap ; Hwang, Min-Jeong ; Jang, Dong-Soon ; Ohm, Tae-In ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 341~348
The basic principle of fry drying process of sludge lies in the rapid pressure change of sludge material caused by the change of temperature between oil and moisture due to the difference of specific heat. Therefore, the rapid increase of pressure in drying sludge induces the efficient moisture escape through sludge pores toward heating oil media. The object of this study is to carry out a systematic investigation of the influence of various parameters associated with the sludge fry drying processes on the drying efficiency. To this end, a series of parametric experimental investigation has been made together with the numerical calculation in order to obtain typical drying curves as function of important parameters such as drying temperature, sludge diameter, oil type and sludge type. In the aspect of frying temperature, especially it is found that the operation higher than
was favorable in drying efficiency regardless of type of waste oil employed in this study. The same result was also noted consistently in the investigation of numerical calculation, that is, in that the sludge particle drying was efficiently made over
irrespective of the change of particle diameter. As expected, in general, the decrease of diameter in sludge was found efficient both experiment and numerical calculation in drying due to the increased surface area per unit volume. In the investigation of oil type and property, the effect of the viscosity of waste oil was found to be more influential in drying performance. In particular, when the oil with high viscosity, a visible time delay was noticed in moisture evaporation especially in the early stage of drying. However, the effect of high viscosity decreased significantly over the temperature of
. There was no visible difference observed in the study of sludge type but the sewage sludge with a slightly better efficiency. The numerical study is considered to be a quite useful tool to assist in experiment with more detailed empirical modeling as further work.
Determination of Trace-Level Perchlorate by IC-MS/MS and Distribution in the Han River
Kim, Hyun-Hee ; Han, Ihn-Sup ; Jeong, Gwan-Jo ; Park, Hyeon ; Han, Sun-Hee ; Cho, Wan-Seon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 349~356
Ion chromatography (IC) coupled with conductivity detector (CD) is a common system for the determination of perchlorate in water samples. Although the IC method with CD has been widely used for the determination of trace level perchlorate ion in water, sensitivity decreases dramatically as the complexity of the matrices increases. Here we proposed the application of ion chromatography coupled with mass spectrometry (IC-MS/MS) to significantly improve selectivity of perchlorate. The mean recovery of the method was 104.4
5.7% and the relative standard deviation (RSD%) was 1.9
1.3%. The alculated method detection limit (MDL) was 0.0207
. The concentrations of perchlorate were minimum <0.1
and maximum 18.3
in source water (Namhan, Bukhan and Han River). Hongreung showed higher concentrations (
) than the other places. And the concentrations of perchlorate were 0.18~0.34
in the samples taken from the six water treatment plants and six intake stations in Seoul.
Measurement of Activation and Ohmic Losses using a Current Interruption Technique in a Microbial Fuel Cell
Park, Kyung-Won ; Oh, Sang-Eun ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 357~362
Electricity can be directly generated from organic matter even wastewaters using a microbial fuel cell. To achieve high power in MFCs, finding factors decreasing activation and Ohmic losses is very important. In this study we determined activation loss at the anode and cathode and Ohmic loss using the current interruption technique in a H-type MFC. Activation loss at the cathode was four times higher that that of anode activation loss even if pt-coated carbon (0.5
;10%Pt) was used as the cathode. Ohmic loss determined using current interruption technique (1146
) was almost same as the internal resistance (1167
) measured using AC impedance. The sum of activation losses at the anode and cathode was the same as the value of activation loss of the cell.
Variation of Adenosine tri-Phosphate(ATP) in Fermentation-Extinction of Food Wastes with Wood Bio-Chip
Oh, Jeong-Ik ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 363~368
The overall indicator of microbial activity in the fermentation-extinction reaction of food waste by using bio wood-chips were investigated by considering adenosine tri-phosphate(ATP). Degradation rate of organic compounds, which was represented by chemical oxygen demand(COD) and total nitrogen(TN), was increased with the concentration of adenosine tri-phosphate during fermentation-extinction reaction of food waste by using bio-wood chips. With this view, the ATP would be one of the overall evaluation indicator of organic degradation in the species of bio-wood chip for the fermentation-extinction of food waste.
T-RFLP Analysis of Microbial Community Structure in Leachate from Landfill Sites
Yu, Jae-Cheul ; Ishigaki, Tomonori ; Kamagata, Yoichi ; Lee, Tae-Ho ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 369~378
Microorganisms are key-role player for stabilization of landfill sites. In order to evaluate the availability of T-RFLP(Terminal Restriction Fragment Length Polymorphism) for monitoring microbial community variations during stabilization of landfill sites, the phylogenic diversity of microbial community in the leachate from 4 different full-scale landfills was characterized by T-RFLP based on bacterial 16S rDNA. Main population of microbial community analyzed by T-RFLP was significantly similar with that of microbial community analyzed by clone library analysis. The results of T-RFLP analysis for main population of microbial community in the leachate from landfills with different landfill structures, waste types and landfill ages showed apparently different microbial diversity and structures. Therefore, long-term monitoring of microbial community in leachate from landfill sites by using T-RFLP is expected to be available for evaluation of landfill stability.
Removal Mechanisms for Water Pollutant in Constructed Wetlands: Review Paper
Ko, Dae-Hyun ; Chung, Yun-Chul ; Seo, Seong-Cheol ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 379~392
In these days, constructed wetlands are applied in Korea for various purposes ; post-treatment of effluent in wastewater treatment, management of stormwater and restoration of aquatic ecosystems. However, the removal mechanisms for water pollutant in constructed wetlands are not clearly understood because they are affected by climate, influent characteristics and local constraints. Therefore, this paper is focused on the process that the pollutant, especially nitrogen and phosphorus, of the wetland is removed by. In this study, the main nitrogen removal is performed by nitrification/denitrification mechanism in the rhizosphere of constructed wetlands. And the majority of the phosphorus is removed by adsorption on the substrate of wetland. However the fate of phosphorus in wetlands can be diverse depending on the Oxidation Reduction Potential(ORP), adsorption/desorption, precipitation/dissolution, microbial effect, etc.
An Experimental Study on the VOCs Concentration Variation using a Petroleum Spill Imitation Trial Test Chamber
Chung, Jin-Do ; Lee, Dong-Hyun ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 4, 2010, Pages 393~398
This study prepared and utilized an imitation trial test chamber for a petroleum spill to predict the concentration of discharged Volatile Organic Compounds in the air at the time of Tae-An peninsula's petroleum spill, which happened in December, 2007. The petroleum spill imitation trial test chamber measured and analyzed the concentration variation of total VOCs. As the ambient air velocity increased, so the concentration of VOCs decreased; and as the water temperature rose, the concentration of VOCs increased. Furthermore, it appears that total concentration of VOCs decrease by more than 90% 6 days after the initial petroleum spill compared to the initial concentration of VOCs.