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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 37, Issue 12 - Dec 2015
Volume 37, Issue 11 - Nov 2015
Volume 37, Issue 10 - Oct 2015
Volume 37, Issue 9 - Sep 2015
Volume 37, Issue 8 - Aug 2015
Volume 37, Issue 7 - Jul 2015
Volume 37, Issue 6 - Jun 2015
Volume 37, Issue 5 - May 2015
Volume 37, Issue 4 - Apr 2015
Volume 37, Issue 3 - Mar 2015
Volume 37, Issue 2 - Feb 2015
Volume 37, Issue 1 - Jan 2015
Selecting the target year
Improvement of Anodic Performance by Using CTP Binder Containg Nickel
Yoon, Hyung-Sun ; Song, Young-Chae ; Choi, Tae-Seon ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 499~504
DOI : 10.4491/KSEE.2015.37.9.499
The composite anodes of expanded graphite (EG) and multiwall carbon nanotube (MWCNT) for microbial fuel cells were fabricated by using coal tar pitch (CTP) binder containing nickel (Ni), and the effect of the anodes with the binders on the performance of the MFCs were examined in a batch reactor. During the start-up of the MFCs, quick increase in voltage was observed after a short lag phase time, indicating that the CTP binder is biocompatible. The biomass attatched on the anode surface was more at higher Ni content in the binder, as well as at smaller amount of CTP binder for the fabrication of the anode. The internal resistance of the MFC was smaller for the anode with more biomass. Based on the results, the ideal combination of CTP and Ni for the CTP binder for anode was 2 g and 0.2 g, respectively. The maximum power density was
, which was higher 23.7% than the anode with Nafion binder as control. The CTP binder containing Ni for the fabrication of anode is a good alternative in terms of performance and economics of MFCs.
Effects of pH, Water Temperature and Chlorine Dosage on the Formation of Disinfection Byproducts at Water Treatment Plant
Lee, Ki-chang ; Lee, Wontae ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 505~510
DOI : 10.4491/KSEE.2015.37.9.505
This study investigated formation potential of 16 disinfection byproducts (DBPs) (e.g., g trihalomethanes, haloacetic acids, haloacetonitriles, chloral hydrate, etc.) upon chlorination of raw water at various pH, water temperatures, and chlorine doses. We also compared the DBP formation potential (DBPFP) of raw and filtered waters. Most of DBPs were formed higher at neutral pH, but dichloroacetic acid, chloroform, and bromodichloromethane were formed higher over pH 7. As water temperature increased, concentrations of chloral hydrate, haloacetic acids, and haloacetonitriles linearly increased while that of trihalomethanes exponentially increased. Formation of chloral hydrate, trihalomethanes, and trihaloacetonitriles significantly increased up to 2.0 mg/L
of chlorine addition, then gradually increased at 2.0~5.6 mg/L
. Filtered water formed less DBPs than raw water in most DBPs except for trihalomethanes.
Study on the Changes of the Mineral Contents in Tap-water Drinking with Diverse Teas
Kim, Jeonghee ; Ryoo, Rina ; Song, Daesung ; Lee, Jeongyeop ; Lee, Young-Joo ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 511~516
DOI : 10.4491/KSEE.2015.37.9.511
On this study, we investigated the removal characteristics of residual chlorine and DBPs in tap-water during boiling. Also we investigated the releasing characteristics of essential minerals in infusion tea. While recent studies focused on removal mechanisms of harmful heavy metals in infusion tea, this study tried to suggest the way to drink tap-water healthier and safer by examining releasing mechanisms of essential minerals in infusion tea. As a result, residual chlorine(initial conc. was 0.7 mg/L) was all removed in 20 minutes after heating and DBPs (the sum of THMs, HAAs and CH) were removed up to 65%. 6 kinds of essential minerals (Ca, K, Na, Mg, S, P) were released from 5 kinds of infusion tea (barley tea, corn tea, brown rice tea, cassia seed tea, solomon's seal tea) on the market. In cassia seed tea, the amount of essential minerals released from tea showed the highest values, 9.6 mg/g, and brown rice tea was the lowest, 1.6 mg/g. Particularly, the released amounts of potassium, playing a key role in human body in maintaining normal blood pressure, cell metabolism and enzyme action, showed relatively high. Through this study, we got to know that essential minerals can be obtained up to 40% of recommended nutritional intake for Korean by boiling tap-water with infusion tea.
Analysis on Trends and Major Impact Factors of Water Quality Dynamics in the Gab-Cheon River, Daejeon, Korea
Lee, Gayoung ; Seo, Dongil ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 517~525
DOI : 10.4491/KSEE.2015.37.9.517
This study analyzes water quality change trends in three major rivers in Daejeon and effect of discharge from Daejeon Wastewater Treatment Plant between 1992 and 2014. As of 2014, COD concentration in the Gab-cheon-A station is in level VI for Korea river water quality standard while BOD and TP are in level III. As expansions of the treatment plant, water quality in the Gab-cheon River has been improving accordingly. However, during the study period, TN concentrations of the headwater and the most downstream locations of the Gab-cheon River have increased about twice and three times, respectively. It was estimated that the treatment plant is responsible for 35%. 46%, 76% and 63% of BOD, COD, TN and TP loadings of the Gab-cheon River, respectively. It was also estimated that small tributaries and nonpoint sources are responsible for 54% and 47% of BOD and COD loadings of the Gab-cheon River. Therefore, it is recommended to further reduce nutrient loadings from the treatment plant and also reduce surface runoff organic loading from nonpoint sources including small tributaries and storm sewers.
A Study on the Odor Characteristics and Identification of Microbial in Biological Swine Manure Treatment Process by Bioreactor
Ko, Joon-il ; Park, Gui-hwan ; Bae, Ju-soon ; Oh, Gil-young ; Chung, Seon-yong ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 526~532
DOI : 10.4491/KSEE.2015.37.9.526
A bioreactor filling with pellets and stones was equipped to the swine manure treatment system, which is expected to emit high concentration of odor in the process of the organic wastewater treatment system, and in comparison with the activated sludge process as the control process, the reactor operation state, treatment water quality and odor emission concentration were measured. The reactor using the bioreactor proved to be much more stable in the bubble condition, treatment water transparency, etc, and BOD removal efficiency was also much better. The removal efficiency of T-N and T-P, however, showed little difference in the two reactors. Odor, as a result of examining
concentratio, and complex odor, was 4 times to 24 times less emitted in the system using bioreactor than in the activated sludge system.
, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide were not found or were found in only 5 ppbs in each reactor and showed little difference between the two reactors. In the bioreactor process, Bacillus sp./ Pseudomonas sp. species were mainly found and in the activated sludge process, acterium sp. Chryseobacterium sp. species were mainly found.
Introduction of the Basin Sewerage Plan in Japan through Case Studies of the Lake Biwa Sewerage System
Han, Mideok ; Park, Bae Kyung ; Park, Ji Hyoung ; Kim, Yong Seok ; Rhew, Doug Hee ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 533~541
DOI : 10.4491/KSEE.2015.37.9.533
We investigate the Japan's Master Plan of Comprehensive Sewerage System (JMPS) and Lake Biwa basin sewerage and suggest future development direction of the Watershed Sewerage System Maintenance Plan in Korea enforced on February 2, 2013. The JMPS is designed for compliance with the environmental standard for water quality under the Environmental Policy Act. The effluent standards applied in the master plan of Lake Biwa's Sewerage Plan for the Lake Biwa is tougher than the national standards. Therefore the Lake Biwa Baisn Sewerage System was the first in Japan to adopt facilities that perform advanced treatment for nitrogen and phosphorus removal. BOD, SS, T-N and T-P concentrations of discharge water of sewage are 0.9, 0.6, 5.5, 0.06 mg/L, respectively. Especially removal efficiency for BOD is 99.5 percent. It is necessary to study the diversification of the evaluation criteria, cost minimization approach, subsidy system improvement, economic concept of discharge load adjustment system and establishment of basin sewerage concept for the development of the basin sewerage plan in Korea.
Influence of Applied Voltage for Bioelectrochemical Anaerobic Digestion of Sewage Sludge
Kim, Dong-Hyun ; Song, Young-Chae ; Qing, Feng ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 9, 2015, Pages 542~549
DOI : 10.4491/KSEE.2015.37.9.542
The bioelectrochemical anaerobic digestion for sewage sludge was attempted at different applied voltages ranged from 0.2 V to 0.4 V. At 0.3 V of the applied voltage, pH and VFAs were at 7.32 and 760 mg COD/L, respectively, which were quite stable. The methane production rate was
, and the methane content in biogas was 73.8%, indicating that the performance of the bioelectrochemical anaerobic digestion could be considerably improved by applying a low voltage. At 0.4 V of the applied voltage, however, the contents of the minor VFA components including formic acid and propionic acid were increased. The methane production rate was reduced to
and the biogas methane content was also reduced to 72.4%. At 0.2 V of the applied voltage, the pH was decreased to 6.3, and VFAs was accumulated to 5,684 mg COD/L. The contents of propionic acid and butyric acid in the VFAs were considerably increased, The performances in terms of the methane production rate and the biogas methane content were deteriorated. The poor performance of the bioelectrochemical reactor at 0.2 V of the applied voltage was ascribed to the thermodynamic potential lack for the driving of the carbon dioxide reduction into methane at cathode.