Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korean Society on Water Environment
Journal Basic Information
Journal DOI :
Korean Society on Water Quality
Editor in Chief :
Volume & Issues
Volume 31, Issue 6 - Nov 2015
Volume 31, Issue 5 - Sep 2015
Volume 31, Issue 4 - Jul 2015
Volume 31, Issue 3 - May 2015
Volume 31, Issue 2 - Mar 2015
Volume 31, Issue 1 - Jan 2015
Selecting the target year
Evaluation of the Inhibitory Effect of Cu
on the Activated Sludge
Kim, Chang-Gyu ; Kim, Yo-Yong ; Park, Ik-Beom ; Song, Jin-Ho ; Nam, Woo-Kyong ; Han, Song-Hee ; Kim, Bok-Jun ; Oh, Jo-Gyo ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 87~93
DOI : 10.15681/KSWE.2015.31.2.87
In this study, the inhibitory effect of toxic metals was investigated on the activated sludge of the municipal sewage treatment plant. The allowable concentration of toxic metals was also estimated for the stable operation of the biological treatment process. The single and mixture toxicity of
were evaluated for the activated sludge microorganisms. As a result, nitrifying microorganisms were more susceptible than heterotrophic microorganisms.
(Inhibition Concentration of 10%) of
for the nitrifying microorganisms was 3 mg/L, 7 mg/L and 25 mg/L, respectively. The mixture toxicity showed three times more sensitive than the single toxicity. The concentrations of
to minimize the inhibitory effect on organic matter removal and nitrification in batch experiments were found to be 1.3 mg/L, 2.5 mg/L and 6.3 mg/L.
Evaluation of Operation Parameters for the Removal of Algae by Electro-Coagulation
Jeong, Kwon ; Kim, Do-Gun ; Kim, Seog-Ku ; Kim, Weon-Jae ; Ko, Seok-Oh ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 94~102
DOI : 10.15681/KSWE.2015.31.2.94
Electro-coagulation experiments were conducted with aluminum (Al) or iron (Fe) electrode in order to determine the optimal electrode material and operation conditions for algae removal. Al electrode showed higher removal rate of algae than Fe electrode because Al flocs have positive surface charges which electrostatically attract algae species having negative surface charges. Removal rate of algae and total phosphorous (T-P) was increased as current density and electrode area increases. It was also found that initial pH with neutral range was optimum for T-P removal by electro-coagulation. Bench-scale continuous flow experiments consisted of electro-coagulation reactor, agitation tank and settling tank were conducted. In electro-coagulation reactor, a large fraction of Al flocs were distributed to scum layer, due to the gas bubbles generated by electrolysis reaction. In agitation tank, most of Al flocs were settled and the optimal mixing intensity was found to be 50 rpm to achieve good settleability. The removal rate of algae was about 90-95%. Additionally, the removal rate of the T-P and COD was observed to be
, respectively. Meanwhile, the removal rate of total nitrogen (T-N) was relatively low at only 24%.
Study on Water Quality Management of Drinking Groundwater and Its Regional Characteristics in the West Gyeong-Nam
Park, Hyungeoun ; Park, Jiyeon ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 103~109
DOI : 10.15681/KSWE.2015.31.2.103
The characteristics of drinking groundwater at west Gyeong-nam were analyzed by investigating 3,698 cases which were carried out from January 2008 to september 2013. 24.5% of the observed data exceeded the drinking water quality standards. Among the drinking water quality standards, 40 parameters were found to exceed. and most problematic were total coliform and HPC(Heterotrophic Plate Count). The unfit ratio of each region for drinking water were 23.1% at Geoje, 18.7% at Geochang, 28.5% at Goseong, 24.1% at Namhae, 32.8% at Sacheon, 20.5% at Sancheong, 36.9% at Uiryeong, 29.2% at Jinju, 40.9% at Tongyeong, 24.7% at Hadong, 20.6.% at Hamyang, 20.1% at Hapcheon. The result of correlation showed that rainfall and unfit ratio of HPC may be associated with the hydrologic durability and season. The coefficient of correlation between them was 0.304. During the summer, the coefficient of correlation was 0.699. But the significant correlation between total coliform and rainfall was not found.
Relations of Nutrient Concentrations on the Seasonality of Algal Community in the Nakdong River, Korea
Yu, Jae Jeong ; Lee, Keung Lak ; Lee, Hye Jin ; Hwang, Jeong Wha ; Lyu, Heuy Seong ; Shin, La Young ; Park, A Reum ; Chen, Se Uk ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 110~119
DOI : 10.15681/KSWE.2015.31.2.110
The construction of the eight large weirs in the Nakdong River, the second largest river in Korea, caused big changes in the physical environment of the water system. Algal communities and their correlations with environmental factors, mainly nutrients were studied at five weir areas in the Nakdong River from 2010 to 2013. Water quality, hydrodynamics and algal composition were investigated. Results showed that flow velocities were reduced compared with that before weir construction near the areas where are located in the mid and upstreams of the Nakdong River. A seasonal algal community succession was observed and it was mainly correlated with temperature and phosphorus. Diatoms were dominated from winter to spring months and massive diatomic blooms of Stephanodiscus sp. occurred early in March during survey period. Cyanobacterial blooms of Microcystis sp. occurred from July to September 2013 and was preceded by the lower total phosphorus concentration of
. The correlations between total phosphorus concentrations and algal abundances were not significant during the survey periods. However, significant correlation with cyanobacteria was found in the period of weir construction after only at the GG survey site and blooms periods of 7 times in the survey sites, and its correlation coefficients were 0.53 (p<0.001) and 0.42 (p<0.01) respectively. When algal bloom was observed, partially low nutrient concentration was observed in the Nakdong River. In conclusion, partially low nutrient concentration which may result from algal bloom was observed, and we presume it caused the reduction of algal abundunces.
A Study on Optimal Pervious/Impervious Map Generation Method for Urban Impervious Surface Management based on GIS
Oh, Seong Kwang ; Kim, Kye Hyun ; Lee, Chol Young ; Ryu, Kwang Hyun ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 120~133
DOI : 10.15681/KSWE.2015.31.2.120
Due to increasing impervious surfaces resulting from urbanization and industrialization which are directly linked to urban inundation and non-point pollutants runoff, there is a need to manage them systematically. A management over urban impervious surfaces calls for pervious/impervious maps, which enable viewing the distribution of impervious surfaces. Nevertheless, relevant data are absent as now. In this respect, despite the diversity of proposed methods, pilot implementation and accuracy verification have never been conducted. Therefore, this study is aimed to produce a pilot pervious/impervious map based on previously proposed methods and to elucidate its pros and cons with a view to proposing a method for producing a GIS-based optimal pervious/impervious map. Following previously proposed methods, a pervious/impervious map of Bupyeong-gu, Incheon was produced. Then, a method of producing optimal pervious/impervious maps applicable to urban areas was proposed through the comparison of pros and cons of relevant spatial data. As a result, the map had been confirmed 99.2% of classification accuracy. Based on the present findings, future studies should establish a standardized method for producing. Also, this method should be used to produce pervious/impervious maps of other regions so that it can be applied to managing impervious surfaces in major urban areas nationwide.
Effect of Acorn Powder on the Biomass Productivity of Microalgae
Choi, Hee-Jeong ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 134~141
DOI : 10.15681/KSWE.2015.31.2.134
The focus of this study was to observe the growth of Chlorella vulgaris and Botryococcus braunii under mixotrophic conditions (i.e., added acorn) with the aim of increasing biomass and triacylglycerols (TAGs) content. The result of investigation indicated that the acorn contains a lot of carbonate (87.29%) and glucose (97.99 mg%). A significant growth of biomass was obtained when grown in acorn rich environment comparing to autotrophic conditions. 3 g/L acorn yielded the highest biomass concentration for these strains. Thus, the biomass productivity with 3 g/L acorn was obtained 2.31 times and 2.10 times higher than that of authotrophic conditions for Chlorella vulgaris and Botryococcus braunii, respectively. The maximum amount of TAGs was reached 14.35% and 18.41% for Chlorella vulgaris and Botryococcus braunii, respectively, in the growth medium with 5 g/L acorn. The effect of acorn could enhance the investigated microalgae growth, biomass productivity and TAGs content. This provides a feasible way to reduce the cost of bioenergy production from microalgae.
Analysis on the Relationship between Number of Species and Survey Area of Benthic Macroinvertebrates Using Weibull Distribution Function
Kong, Dongsoo ; Kim, Ah Reum ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 142~150
DOI : 10.15681/KSWE.2015.31.2.142
The relationship between the number of benthic macroinvertebrate species and the accumulated survey area were investigated in a clean stream and an impaired stream of Korea. Five models to characterize species-area functions were compared, and the Weibull model fitted species-area data well. The other models (Arrhenius, Romell-Gleason, Kylin, Lognormal model) had small or notable bias. The maximum number of species and half-saturation area derived from the Weibull model may be used as the indicators of the carrying capacity and the habitat complexity respectively.
A Study on Optimum Conditions Derivation on Thermal Hydrolysis of Food Wastewater and the Applicability of the Thermal Solubilization in Biological Denitrification Process
Lee, Ki Hee ; You, Hee Gu ; Joo, Hyun Jong ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 151~158
DOI : 10.15681/KSWE.2015.31.2.151
The aim of this research is to derive an optimum operating condition for the thermal solubilization equipment that is employed to increase concentration of soluble organic materials and to assess whether it would be possible to use the waste sludge generated by thermal solubilization reaction as an external carbon source in biological denitrification process. For the purpose, we have constituted a laboratory-size thermal solubilization equipment and have assessed thermal hydrolysis efficiency based on various reaction temperature and reaction time. We have also derived SDNR using the waste sludge generated by thermal solubilization reaction through a batch experiment. As a result of research, the highest thermal hydrolysis efficiency of about 42.8% was achieved at
of reaction temperature and at 90 minutes of reaction time. And when SDNR was derived using the waste sludge, the value obtained was
, showing SDNR that is higher than that obtained by the results of existing researches that used common wastewater as an external carbon source. Accordingly, in view of the fact that food wastes vary quite a bit in characteristics based on the area they are generated from and seasonal change, it seems that a flexible operation of thermal solubilization equipment is required through on-going monitoring of food wastes that are imported to food wastes recycling facilities.
Evaluation of Organic Matter Sources of Phytoplankton in Paldang Reservoir using Stable Isotope Analysis
Kim, Jongmin ; Kim, Bokyong ; Kim, Minseob ; Shin, Kisik ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 159~165
DOI : 10.15681/KSWE.2015.31.2.159
The organic matter sources of phytoplankton and related environmental factors influencing algal bloom in Paldang reservoir were studied using nitrogen and carbon isotope ratio(
). Phytoplankton samples for stable isotope analysis were collected from four points in reservoir using a plankton net. Physicochemical water quality, algal taxa and hydrological data were collected from published monitoring material. Phytoplankton samples were analyzed by IRMS. CN ratio of each sample was very similar to that of phytoplankton from literature cited.
of each sample was decreased during July. Mixing and dilution of nitrogen sources due to increment of influx by concentrated rainfall were considered as the main reason for the decline of
. Based on analyzed
value of each sample, nitrogen source of Bughan river sample was presumed to come from soil. The nitrogen sources of Namhan river and Kyeongan stream samples seemed to be sewage or animal waste. Low
value in August (2012) seemed to be influenced by isotope fractionation due to the blooming of nitrogen-fixation blue-green algae (Anabaena spp.). Variation in
values particularly by blue-green algal bloom was considered the important factor for estimating the organic matter sources of phytoplankton.
Analysis of Pollutant load Reduction Efficiency with Riparian Buffer System Using the SWAT-REMM
Choi, Youn Ho ; Ryu, Ji Chul ; Hwang, Ha Sun ; Kum, Dong Huyk ; Park, Youn Shik ; Jung, Young Hun ; Choi, Joong Dae ; Lim, Kyoung Jae ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 166~180
DOI : 10.15681/KSWE.2015.31.2.166
Pollutant in watersheds comes from two major sources which are NPS (nonpoint source pollution) and PS (point source pollution). Most of the pollutant can be treated by wastewater treatment plants. However, wastewater treatment plants may not be an appropriate practice to improve water quality for the watersheds with large portion of NPS pollutant and NPS pollution from direct runoff and baseflow has different characteristics. Therefore the practices to improve water quality need to be comprehensive for pollutants by both direct runoff and baseflow. Riparian buffer, one of practices to manage pollutant in watershed, has been applied to reduce pollutant not only from direct runoff but also baseflow. In this study, the scenarios for pollutant reduction by wastewater treat plants and the nitrogen reduction by riparian buffer were simulated using SWAT-REMM to suggest an effective plan for pollutant reduction from baseflow. Riparian buffer provided nitrogen reduction of 0.2~75.0% in YbB watershed and 38.0~47.0% in GbA watershed. The result indicates that riparian buffer is effective to reduce the pollutant especially from baseflow, and it suggested as suitable for the a watershed which WWTP discharge is not capable to reduce enough pollutant.
Three-dimensional Algal Dynamics Modeling Study in Lake Euiam Based on Limited Monitoring Data
Choi, Jungkyu ; Min, Joong-Hyuk ; Kim, Deok-Woo ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 181~195
DOI : 10.15681/KSWE.2015.31.2.181
Algal blooms in lakes are one of major environmental issues in Korea. A three-dimensional, hydrodynamic and water quality model was developed and tested in Lake Euiam to assess the performance and limitations of numerical modeling with multiple algal groups using field data commonly collected for algal management. In this study, EFDC was adopted as the basic model framework. Simulated vertical profiles of water temperature, dissolved oxygen and nutrients monitored at five water quality monitoring stations from March to October 2013, which are closely related to algal dynamics simulation, showed good agreement with those of observed data. The overall spatio-temporal variations of three algal groups were reasonably simulated against the chlorophyll-a levels of those estimated from the limited monitoring data (chlorophyll-a level and cell numbers of algal species) with the RMSEs ranging from 2.6 to
. Also, note that
level in the water column was a key limiting factor controlling the growth of three algal groups during most of simulation period. However, the algal modeling results were not fully attainable to the levels of observation during short periods of time showing abrupt increase in algae throughout the lake. In particular, the green algae/cyanobacteria and diatom simulations were underestimated in late June to early July and early October, respectively. The results shows that better understanding of internal algal processes, neglected in most algal modeling studies, is necessary to predict the sudden algal blooms more accurately because the concentrations of external
and specific algal groups originated from the tributaries (mainly, dam water releases) during the periods were too low to fully capture the sharp rise of internal algal levels. In this respect, this study suggests that future modeling efforts should be focused on the quantification of internal cycling processes including vertical movement of algal species with respect to changes in environmental conditions to enhance the modeling performance on complex algal dynamics.
Changes in Characteristics of Sewer Flow & Its Water Quality from the Sewer Rehabilitation Area
Park, Jun Dae ; Oh, Seung Young ; Choi, Yun Ho ; Kim, Yong Seok ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 196~208
DOI : 10.15681/KSWE.2015.31.2.196
This study analyzed the characteristics of sewer flow and its water quality, and investigated changes in the characteristics in three areas where the sewer rehabilitation projects have been carried out. In S1 area, the patterns of the flow became regular and the range of the fluctuation decreased after the sewer rehabilitation. The flow and its BOD concentration increased. The infiltration/inflow and exfiltration showed clear distinction before and after the sewer rehabilitation in this area. In S2 area, the patterns and the range of the fluctuation of the flow made no differences before and after the sewer rehabilitation. The flow decreased slightly and its BOD concentration increased considerably after the sewer rehabilitation. Big decrement in stormwater inflow but small in exfiltration appeared in this area. In S3 area, the patterns and the range of the fluctuation of the flow made no differences before and after the sewer rehabilitation. The flow decreased slightly and its BOD concentration increased in a small rate in this area.
A Study on the Characteristic of Iron Oxide Carrier for the Removal of Arsenic in Small Water Treatment Plant
You, Hee Gu ; Lee, Ki Hee ; Joo, Hyun Jong ;
Journal of Korean Society on Water Environment, volume 31, issue 2, 2015, Pages 209~215
DOI : 10.15681/KSWE.2015.31.2.209
The purpose of this study is to evaluate the characteristic of the iron oxide carrier for removing arsenic contained in the groundwater. 4 types of iron oxide carrier used in the study is iron oxide coated sand carrier (IOCSC), iron oxide coated zeolite carrier (IOCZC), iron oxide plasticity carrier (IOPC) and platinum iron oxide plasticity carrier (PIOPC). The results of this study, IOPC is showed high arsenic adsorption strength and the maximum amount of adsorption than the IOCC. Based on the results of the arsenic adsorption characteristic, by using IOCC was conducted to column test. As a result, PIOPC is showed a high arsenic adsorption amount than IOPC, it was found that the time required to reach the breakthrough point is also extended. Therefore it is determined that stably compliance with water quality standards enhanced drinking water when using the PIOPC.