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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korean Society of Water and Wastewater
Journal Basic Information
Journal DOI :
The Korean Society of Water and Wastewater
Editor in Chief :
Volume & Issues
Volume 27, Issue 6 - Dec 2013
Volume 27, Issue 5 - Oct 2013
Volume 27, Issue 4 - Aug 2013
Volume 27, Issue 3 - Jun 2013
Volume 27, Issue 2 - Apr 2013
Volume 27, Issue 1 - Feb 2013
Selecting the target year
Recent trends in anaerobic membrane bioreactor treatment of domestic wastewater
Shin, Chung-Heon ; Bae, Jae-Ho ; Kim, Jeong-Hwan ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 529~545
DOI : 10.11001/jksww.2013.27.5.529
With the increasing concern on climate changes and energy shortage, anaerobic membrane bioreactors (AnMBR) become a promising alternative to aerobic processes for domestic wastewater treatment. Two major advantages of AnMBRs are energy production and sludge reduction. Recently, several different configurations of AnMBRs have been proved to produce high quality effluent at reasonable hydraulic retention time and ambient temperature. One of the major problems of the AnMBR is membrane fouling control, and some solutions are already suggested. Other problems to be solved before the full application of the AnMBR are recovery of dissolved methane, management of residual nutrients and sulfide. Considering the potential advantages and future technology development, AnMBR will become major domestic wastewater treatment process in near future.
Disinfection effect and formation characteristics of disinfection by-product at the Electrolyzed Water
Cho, Youngman ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 547~554
DOI : 10.11001/jksww.2013.27.5.547
Chlorine has strong oxidizing power, also it is many advantages over other disinfectants such as the residual characteristic and economic feasibility. However, chlorine also has disadvantages such as creating disinfection by-products of chlorine as THMs. In particular, the most deadly disadvantage of chlorine is that it is extremely poisonous toxins about all alive lives. Disinfection with electrolysis water can be a very useful way Because you do not have to worry about chlorine's dangerous. In this study, we evaluated the potential as a disinfectant, across the evaluating disinfection effect and generating characteristic of by-products. The electrolyzed water could be obtained removal efficiencies of over 99.9 % the coliform by operating condition such as residence time, current density (voltage), the electrode gap. The residual chlorine be generated 10,000 mg/L in current density
and residence time of 10 minutes. The residual chlorine concentration was possible to maintain a stable. The by-products generated by high concentration residual chlorine in the reactor such as trihalomethanes, haloaceticacid, chloralhydrate, haloacetonitrile were detected in less than a water quality standards. At the concentration of less than residual chlorine of 1 ppm, the chlorine disinfection by-products be generated most below the detection limit.
Cost comparison of pretreatment processes in large SWRO desalination plant
Kim, Youngmin ; Kim, Jin-Ho ; Lee, Sangho ; Lee, Chang-Kyu ; Park, Kwang Duk ; Choi, June-Seok ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 555~560
DOI : 10.11001/jksww.2013.27.5.555
A cost analysis method for pretreament processes of a large scale seawater desalination plant was considered using a cost estimation model, WaTER (Water Treatment Estimation Routine). This model is based on cost functions of U.S. EPA to conduct economic analysis of water treatment facilities. A virtual seawater desalination plant which has pretreatment production capacity of
per day was chosen as a model plant. Dual media filtration and microfiltration systems were compared as pretreatment process, and the following reverse osmosis process was modeled. As a result, microfiltration showed a price competitiveness in condition of operating with reverse osmosis process by reducing the loads of water treatment and membrane cleaning despite it's high annual cost.
Evaluating Two Types of Rectangular Secondary Clarifier Performance at Biological Nutrient Removal Facilities
Lee, Byonghi ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 561~570
DOI : 10.11001/jksww.2013.27.5.561
There are two types of rectangular secondary clarifier at biological nutrient removal (BNR) facility to settle MLSS; conventional activated sludge secondary clarifier and Gould Type I clarifier. In this study, the performances of two types at respective biological nutrient removal facility are compared using weekly operational data. Surface Overflow Rate (SOR), Surface Loading Rate (SLR), Sludge Volume Index (SVI), secondary effluent SS concentration are studied. It has found that Gould Type I has 3.5 times less average secondary effluent SS concentration that is 2.4 mg/L than that of conventional activated sludge secondary clarifier. Both SOR and SLR have shown little effect on secondary effluent SS concentrations at Gould Type I clarifier in contrary that SOR affects the secondary effluent SS concentrations at conventional activated sludge rectangular secondary clarifier. From this study, it is recommended that Gould Type I must be considered for secondary clarifier when BNR plant is designed.
Aggregation Behavior of Silver and TiO
Nanoparticles in Aqueous Environment
Lim, Myunghee ; Bae, Sujin ; Lee, Yong-Ju ; Lee, Sung-Kyu ; Hwang, Yu Sik ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 571~579
DOI : 10.11001/jksww.2013.27.5.571
The aggregation behaviors of silver nanoparticles (AgNPs) and titanium dioxide (
) nanoparticles were investigated. Time-resolved dynamic light scattering (DLS) was used to study the initial aggregation of AgNPs and
over a range of mono (NaCl) and divalent (
) electrolyte concentrations. The effects of pH, initial concentration of NPs and natural organic matters (NOM) on the aggregation of NPs were also investigated. The aggregation of both nanoparticles showed classical Derjaguin-Landau-Verwey-Overbeek (DLVO) type behavior. Divalent electrolyte was more efficient in destabilize the AgNPs and
than monovalent electrolyte. The effect of pH on the aggregation of AgNPs was not significant. But the aggregation rate of
was much higher with increasing pH. Higher NPs concentration leads to faster aggregation. Natural organic matter (NOM) was found to substantially hinder the aggregation of both AgNPs and
. This study found that the aggregation behavior of AgNPs and
are closely associated with environmental factors such as ionic strength, pH, initial concentration of NPs and NOM.
Construction Method of Zero Discharge System for Environmental Energy Complex in Landfill
Chun, Seung-Kyu ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 581~590
DOI : 10.11001/jksww.2013.27.5.581
A research was performed for zero discharge system of waste water which is produced from energy recovery process of waste and biomass. Leachate and all kinds of waste water should be separated and integrated into three categories in addition to converting existing leachate treatment facility into waste water treatment facility as well as introducing a management system of reverse osmosis membrane facility and bioreactor landfill. Following these conditions to better water treatment process, it was likely to produce over 3,000 tons of low-grade recycling water and 2,000 tons of high-grade recycling water per day when zero discharge system of waste water is applied starting from 2016. Economical efficiency was also surveyed in total treatment fee. Present system costs 18,129 million won per year, and suggested zero discharge system would cost 15,789 million won per year.
Infant target facilities and facilities for children in elementary school Comparison and Improvement of Indoor Air Quality for Research
Seo, Byong-Won ; Lee, Ju-Hwa ; Park, Ji-Hoon ; Kang, Seon-Hong ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 591~601
DOI : 10.11001/jksww.2013.27.5.591
In modern society, we are living indoor at 80 - 90 % or more of the day, therefore most people are exposed to unconscious indoor air pollutants by various causes. When mother and infant, whose level of immunity are weak, are exposed to polluted indoor air, respiratory diseases and atopy can occur by the growth of bacteria. Therefore, appropriate indoor air quality management is important especially at nursery, elementary school and postpartum clinic etc. In this study, we compared the characteristics of the indoor air qualities of primary school facilities and infant facilities. In this study, seasonal effects were investigated. Also the effects of individual activity area were studied for indoor air quality. During summer season(May-August), the air qualities of each 16 elementary school and nursery school were investigated. During winter season(October-december), the air qualities of each 10 elementary school and nursery school were investigated. As a result, during winter season in 10 of 16 nursery school,
concentration exceeded regulation level of 1000 ppm. This resulted from the operation of heating system and poor ventilation. Also the air quality of all parameters during winter season were worse than during summer, maybe due to poor ventilation. Except HCHO, the concentrations of other parameters were higher in nursery school. This seems to result from relatively low individual activity area of nursery school than elementary school. From this research, more strong regulation for ventilation and installation of air purifier should be implemented.
Variation of hazardous substances in sewage ecotoxicological assessment
Seo, Byong-Won ; Lee, Ju-Hwa ; Lee, Yong-Hoon ; Kang, Seon-Hong ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 603~610
DOI : 10.11001/jksww.2013.27.5.603
According to industrialization, increased toxic chemicals discharge has been causing water pollution. Especially domestic sewage is a major source of water pollution. Sixty percent of the total wastewater discharged is domestic sewage. Self-purification capacity of rivers and streams is drastically reduced by the emission of domestic sewage, industrial wastewater and livestock wastewater. Although domestic sewage is managed by implementing standards and regulations, toxicity effect of domestic sewage to humans and the environment is not yet clearly understood. In this study, by using daphnia magna, the ecotoxicity of domestic swage was assessed. Cl, Cu, Pb, COD, T-N, DO, pH and residual chlorine were investigated as background concentrations. The experiments were conducted with water samples obtained from three local sewage treatment plants. The experiment results indicated that higher level of toxicity corresponds to the higher pollution concentrations. The higher level of combinations of background concentrations such as heavy metals leads to the worse ecotoxicity. Especially, the Cu concentration affects the TU value.
Back Tracing Calculation Method for the Leakage Detection in Water Distribution System
Kwon, Hyuk Jae ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 611~619
DOI : 10.11001/jksww.2013.27.5.611
In this study, Back Tracing Calculation Method was developed to determine the leakage location and leakage amount. Previously developed determination method of monitoring location and newly developed Back Tracing Calculation Method were applied to the sample pipe network and real size pilot plant. After leakage was assumed in the pilot plant, leakage location and leakage amount could be traced by Back Tracing Calculation Method. From the results, it was found that Back Tracing Calculation Method can be applied for the leakage detection in water distribution system. Furthermore, this method can be applied for the pressure management or leakage detection as a pressure control method in water distribution system.
Particle Separation Characteristics and Harvesting Efficiency of Spirulina platensis Using Micro-bubble
Gwak, Gyu-Dong ; Kim, Mi-Sug ; Kwak, Dong-Heui ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 621~629
DOI : 10.11001/jksww.2013.27.5.621
Since algae had been issued an environmental problem, water blooms, deepened due to increase of retention water basin in Korea as well as a biomass resource for producing biofuel, this study conducted a series of experiments for Spirulina platensis using the flotation process with micro-bubble. To elevate utilization of collected-algae, this study focused on omitting or minimizing coagulant's doses as changing a cultivation period and condition affected on physical property change of algae. Two coagulants, PAC and Chitosan, were used to test the collecting rate of algae and the result found no difference between two rates. For flotation experiments without adding the coagulant, dried algae weight (passing 14 days after cultivation for 20 days) detected high separation efficiency 98.2 % and it (passing 7 days after long-term cultivation for 28 days) presented good separation efficiency 91.9 %. Chlorophyll's separation efficiency showed a similar tendency with the case of the dried algae weight. In endogeny conditions, a light source and a carbon source were not considerably affected on the flotation separation efficiency. Thus, this study confirms that algae biomass may be collected without the coagulant during the endogeny condition period after enough cultivation time, 3 weeks.
Phosphate removal using novel combined Fe-Mn-Si oxide adsorbent
Maeng, Minsoo ; Lee, Haegyun ; Dockko, Seok ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 631~639
DOI : 10.11001/jksww.2013.27.5.631
The removal of phosphate from surface water is becoming increasingly vital to prevent problems such as eutrophication, particularly near urban areas. Recent requirements to reduce high concentrations of phosphate rely on physicochemical methods and adsorbents that must be effective even under strict conditions. The phosphate removal efficiencies of two adsorbents, Fe-Mn-Si oxide and Fe-Mn oxide, were investigated and the data used to compare kinetics and isotherm models. The maximum adsorption capacities of the two adsorbents were 47.8 and 35.5 mg-
, respectively. Adsorptions in both cases were highly pH dependent; i.e., when the pH increased from 3 to 9, the average adsorption capacities of the two adsorbents decreased approximately 32.7 % and 20.3 %, respectively. The Freundlich isotherm model fitted the adsorption of Fe-Mn-Si oxide more closely than did the Langmuir model. Additionally, anionic solutions decreased adsorption because of competition with the anions in the adsorbing phosphate. Although affected by the presence of competing anions or a humic substance, Fe-Mn-Si oxide has better adsorption capacity than Fe-Mn oxide.
Improvement of biosand filter embedded with ferric-manganese-silica oxide adsorbent to remove arsenic in the developing countries
Jeong, Ingyu ; Dockko, Seok ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 641~648
DOI : 10.11001/jksww.2013.27.5.641
Arsenic (As) contamination in drinking water is severe problem for about 100 million people who live in Bangladesh, Cambodia, Nepal, India, Vietnam, Myanmar, Mongolia, and Ethiopia etc. Chronic doses cause skin cancer, blackfoot disease, and cardiac damage. Even though the biosand filter (BSF) is popular in many developing countries, it could not remove effectively hazardous ions as As. Adsorbent is effective and feasible to reduce As. In this study the improved biosand filter (iBSF) was embedded with adsorbent, was tested to evaluate As removal as well as organic removal. In 20 days removal of turbidity, bacteria, and
have shown 60-95 % removal. Arsenic was removed more than 99.9 % in the columns embedded with silica oxides of ferric manganese (
) while 5.8 ~ 38.3 % in columns without
. Isotherm test showed that average amount of the adsorbed arsenic on the oxides was 0.56 mg/G.
Framework for a real-time control system of sewer systems
Ryu, Jaena ; Baek, Hyunwook ; Kim, Tae-Hyoung ; Oh, Jeill ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 649~659
DOI : 10.11001/jksww.2013.27.5.649
Real time control (RTC) can be broadly defined as a system that dynamically adjusts the operation of facilities in response to online measurements in the field to maintain and meet the operational objectives, both during dry and wet weather conditions. RTC adds a dynamic component that is actively adjusted in real time based on system conditions. In terms of reducing or eliminating sewer flooding, CSOs and/or managing flows, implementation of RTC has various benefits to sewer system operation. It has been emerging as an attractive approach, but related elements (such as framework for the application, its components and equipments, aspects to be considered) towards its application on sewer systems have not been throughly introduced so far. The main goal of this study is to review several applications of RTC and firm guidelines published abroad, and finally to provide a framework for the proper application of RTC on sewer systems.
Application of Grouping Method to select Priority Restoration Streams in Geumgang Watershed based on Analysis of Pollution Factors
Lee, Sang Ho ; Hwang, Jeong Jae ;
Journal of Korean Society of Water and Wastewater, volume 27, issue 5, 2013, Pages 661~669
DOI : 10.11001/jksww.2013.27.5.661
River-water quality has been greatly improved during past several decades with the extraordinary expansion for the wastewater treatment capacities by the government. Research aims to select the priority restoration streams based on the chronicle data for tributaries in Geumgang watershed as the main stream area in the Chungchungnamdo province. The quality of BOD, phosphorus and percent of sewered population on 15 branch streams were compared by the grouping methods. The results of group D streams by category I that exceed 3.0 mg/L for BOD and 0.1 mg/L for phosphorus were Seuksung, Ganggyung and Bangchuk stream. The results of group D streams by category II that exceed 3.0 mg/L for BOD and less than 63.5 % of average percent of sewered population were Ganggyung, Gilsan, Bangchuk and Seuksung stream. The final results of selected streams drawn by the chronicle data which exceeded the standard quality and lower than the average percent of sewered population were Seoksung, Gangeyung and Bangchuk stream. The pollution of rivers in the down streams were more serious than in the upper streams. Their watersheds have to be improved river water quality, especially to extend sewer systems as well as wastewater treatment facilities.