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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Water and Wastewater
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Journal DOI :
The Korean Society of Water and Wastewater
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Volume & Issues
Volume 20, Issue 6 - 00 2006
Volume 20, Issue 5 - 00 2006
Volume 20, Issue 4 - 00 2006
Volume 20, Issue 3 - 00 2006
Volume 20, Issue 2 - 00 2006
Volume 20, Issue 1 - 00 2006
Volume 16, Issue 3 - 00 2006
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Biosorption Process in Oxidation Ditch and Algal Biomass Reactor on Wastewater Treatment
Kong, Surk-Key ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 3~11
The Study on the Latest Trend of the Drinking Water Regulation for Microorganism and Cryptosporidium in UAS
Ryu, Ho Don ; Kim, Sun Joon ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 12~17
Field Survey on the Status of Sewerage System in Northern Vietnam
Seo, In-Seok ; Kim, Youn-Kwon ; Lee, Yoon-Seob ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 18~23
A Study on Removal of Disinfection By-products in High Concentration Powdered Activated Carbon Membrane Bio-reactor Process for Advanced Water Treatment
Lee, Song-Hee ; Jang, Sung-Woo ; Seo, Gyu-Tae ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 27~34
This study was conducted to evaluate the performance of a membrane bioreactor filled with high concentration of powdered activated carbon (HCPAC-MBR) to reduce DBPs at the drinking water treatment. The pilot system was installed after the rapid sand filtration process whose plant was the conventional treatment process. The removal efficiencies of DBPs were measured during pilot operation period of 2 years. HAA and THM removal rates could be maintained around 80~90% without any troubles and then tremendous reduction of HAA and THM reactivity were observed more than 52%. The average removal rate of HAA formation potential (FP) and THM formation potential (FP) were 70.5% and 67.6% respectively. It is clear that the PAC membrane bioreactor is highly applicable for advanced water treatment to control DBPs.
An Algorithm for Searching On-Off Valves to Isolate a Subsystem in a Water Distribution System
Jun, Hwan Don ; Kim, Joong Hoon ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 35~43
Concerns related to protecting, identifying, and isolating of subsystems of a water distribution network have led to the realization of the increased importance of valves in the system. The most important purpose of valves in water distribution systems is to isolate a subsystem due to breakage, maintenance activities, or contamination. A subsystem called segment is isolated by the closure of adjacent valves. Minimizing the pipe failure impact, an efficient algorithm is required to identify adjacent valves quickly. In this paper, an algorithm to identify adjacent valves to be closed to isolate a subsystem from the remainder of a network when a pipe failure is presented. The algorithm is operated on a matrix called the valve location matrix containing the information of valve locations. An application to an existing water distribution system demonstrates the developed algorithm efficiently locates the adjacent valves for the isolation of a broken pipe.
Biological Manganese Removal in Water Treatment
Kim, Berm-Soo ; Yoon, Jaekyung ; Ann, Hyo-Won ; Kim, Chung-Hwan ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 44~52
Bio-filtration processes using honeycomb tubes (process 1) and aeration and manganese-sand filtration (process 2) were evaluated for the biological manganese removal efficiency. The concentration of manganese at effluent was stabilized after 20days operation in process 1. It was estimated the required time for attaching and growing microorganisms to honeycomb tubes. In long term of operation periods, manganese removal efficiency was dropped for the excessively attached biofilm and manganese dioxide to honeycomb tubes. It took several days for normal operation in process 2, after that manganese removal efficiency was increased to 98% and stabilized for 1.5 years. Microorganisms in process 1 and 2 were isolated and cultured to characterize manganese-oxidizing bacteria. Among the four types of colony, light brown colony was turned blue color by leuco crystal violet spot test. Stenotropomonas genus, known as manganese-oxidizing bacteria, was identified by 16S rDNA partial sequencing analysis which was isolated in process 1 and 2. For the biological treatment to remove manganese, these two considerations are important. One is to choose the proper media attaching manganese oxidant, another one is to define the cultural condition of isolated manganese-oxidizing bacteria.
A Quantitative/Qualitative Study of Infiltration/Inflow for Order Decision of Sewer pipe Maintenance
Park, Myung-Gyun ; Kim, Dae-Sung ; Ahn, Won-Sik ; Oh, Jeong-Mi ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 53~62
This study was carried out to obtain quantities of infiltration, inflow and exfiltration on sewer pipes of three areas at a small city. From the results, the most investigated sewer pipes should be infiltrated by underground water and undetermined water. Flowrate commonly showed two peak at 6 to 8 a.m. and 6 to 9 p.m. and which may be influenced by the sewer flowrate with washing or bathing time. BOD/TN ratio of below 4.0 were inferior as compared with proper criteria 5.1. Infiltration/inflow rates of three areas were 21.7% and
of A, 12.4% and
of B, 22.4% and
of C, respectively. This indicates that infiltration/inflow rate of A was obviously greater than that of B and C. Also, these results show that we can conduct sewer maintenance in good order as A, C and B zone.
Biosorption Characteristics of Lead (II) Using Zoogloea ramigera 115SLR
Kim, Seoung-Hyun ; Song, Hoon ; Son, Sukil ; Lim, In-Gweon ; Chung, Wook-Jin ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 63~70
Biosorption characteristics were investigated at various temperature and pH conditions in order to establish lead(II) removal using Zoogloea ramigera 115SLR. Biosorption equilibrium isotherms and kinetics were obtained from batch experiments. The Freundlich and Langmuir model could be described the biosorption equilibrium of lead(II) on Z. ramigera 115SLR, Ca-alginate bead and immobilized Z. ramigera 115SLR. The maximum biosorption capacity of Z. ramigera 115SLR increased from 325 to 617mg
biomass as temperature increased from 288.15 K to 308.15K from the Langmuir model. Fixed-bed column breakthrough curves for lead(II) removal were also obtained. For regeneration of the biosorbent, complete lead(II) desorption was achieved using 5mM HCl in fixed-bed column. This study shows the possibilities that well-treated immobilized Z. ramigera 115SLR with the mechanical intensity like TEOS (Tetraethyl orthosilicate) treatment and the optimum acid solution for desorption can be used for the effective treatment for lead(II) containing wastewater.
The Effects of Turbidity and pH on the Removal of Cryptosporidium and Giardia by Coagulation Process
Chung, Hyen-Mi ; Park, Sang-Jung ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 71~78
The removal of protozoa in the coagulation process was evaluated under the different pH and turbidity using the jar test after the addition of polyaluminium chloride (PAC) as a coagulant. Two well-known protozoa of Cryptosporidium parvum and Giardia lamblia were tested at the same time with turbidity, the critical water quality parameter of the water treatment process. Both protozoa were removed about 1log (and up to 2log) at the optimum injection of PAC. The source water turbidity and pH affected the removal of protozoa and turbidity. At neutral and alkaline pH, 1.3-1.7log removal of protozoa for low turbid water with 5NTU, and 1.6-2.3log removal for high turbid water with 30NTU were achieved. However, at acidic pH, maximum 0.8-1.0log and 1.1-1.2log were removed for low and high turbid water, respectively, at the optimum PAC injection of 15mg/L. The relation of protozoa and turbidity removals were expressed as the 1st order equation (significantly positive relation) in the most of the tested conditions. In addition, the relation of protozoan removals with residual turbidity were also expressed the 1st order equation (significantly negative relation), although the significance of the equations were reduced at acidic pH. Therefore, residual turbidity could be a good index of efficient protozoan removal in the coagulation process, probably except at the low pH condition.
Enhancement of biodegradability of the Refractory Organic Substances in Aqueous Solution with Discharged Water Generating (DWG) System
Yeo, Inho ; Ryu, Seung Min ; Park, Heekyung ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 79~85
Innovated technique to oxidize pollutants has been developed. The technique for this study uses plasma discharge in 2-phase (Air-Water) and is called Discharged Water Generating (DWG) system. It produces electric arc which generates not only the physical decomposing power against the pollutants but also oxidants to sterilize pollutants depending on the inlet gas species. These physical and chemical products play an important role in COD decrease and biodegradability enhancement. The enhancement of biodegradability for the refractory organic substances in aqueous solution was estimated in this study. Argon discharge reduced NBDCOD of EDTA from 58.7mg/L to 38.8mg/L, but oxygen discharge and ozonation reduced it to 37.74mg/L and 38.73mg/L respectively. Furthermore, Argon discharge changed 1181mg/L of NBDCOD of dye effluent into 606mg/L but oxygen discharge and ozonation changed it into 888mg/L and 790mg/L respectively.
Effect of Experimental Factors on Manganese Removal in Manganese Sand Filtration
Kim, Berm-Soo ; Yoon, Jaekyung ; Ann, Hyo-Won ; Kim, Chung-Hwan ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 86~93
In the drinking water treatment, the aesthetic and color problem are caused by the manganese which is occurring and present in the surface, lake and ground water. The most common treatment processes for removing manganese are known for oxidation followed by filtration. In this study, the manganese sand process was used for removing manganese with river bank filtrate as a source. In the manganese sand process, the residual chlorine and pH are important factors on the continuous manganese oxidation. In addition, space velocity (SV) and alum dosage are play a role of manganese removal. Even though manganese removal increased with increasing chlorine concentration, the control of residual chlorine is actually difficult in this process As the results of tests, the residual chlorine concentration as well as manganese removal were effectively achieved at pH 7.5. The optimum attached manganese concentration on manganese sand was confirmed to 0.3mg/L by the experimental result of a typical sand converting to manganese sand.
An Experimental Study on the Pond Sediment and Water Quality Purification using Oxygen Solubilization Device(OSD) System
Kim, Young-Taek ; Bae, Yoon-Sun ; Roh, Eun-Kyung ; Park, Chul-Hwi ; Lee, Yeon-Ku ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 94~103
The pollution in closing water can be caused by not only artificial factor like sewage but also natural factor like elution from sediment. In this study we analyzed Sediment Oxygen Demand (SOD) for verification of sediment purification effect and sediment elution experiment as well as general items like COD, TN, TP, SS to complement and assess the effect of sediment and water quality. The experiment result showed that the release rate of OSD system were 4 times and 3 times as large as control for P and Fe respectively. SOD for operated OSD system and control were
. From water qualities analyzed by COD, TN, TP, SS, chlorophyll-a, the removal efficiency increase of TN, TP, chlorophyll-a and COD were about 10~20%, 40~50% and 10% respectively. In conclusion, OSD can contribute to improvement of both the waterbody and the sediment environment effectively.
Reviewing Contract of the Buenosaires Water Concession Case with System Dynamics
Lee, Sangeun ; Cha, Donghoon ; Park, Heekyung ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 104~114
Recently, the PPP (Public-Private-Participate) program on water and wastewater services in Korea has been under an active debate. However, the controversy has reached the limits of getting more valuable implications from past foreign experience beyond conceptual and/or qualitative case studies. This paper analyze scientifically and quantitatively the Buenos Aires Water Concession Project focused on propriety of the contract using system dynamics modeling. The results show that Buenos Aires's Project has several problems in the contract phase even though Argentina government spent much time to design it. Analysis results suggest that estimation of K factor considering delay effect and future uncertainty, reduction of the first fixed terms of contract, etc., are needed for a proper contract.
A Study on the Application of Pre-Chemical Treatment on the Decentralized Domestic Wastewater Reclamation System
Lee, Sang-Woo ; Park, Young-Mi ; Seo, Gyu-Tae ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 115~121
The purpose of this study was to investigate applicability of pretreatment on the existing biological treatment for domestic wastewater reclamation. From Jar Tests, it was found that optimum dosage of coagulant was PAC 0.5mg/L and
180mg/L for urban sewage. In this study, PAC 0.5mg/L was selected considering sludge production and the amount of coagulant required. In a continuous experiment performed with combining chemical coagulation and biological treatment, a considerable removal efficency was obtained in term of BOD, SS, T-N, T-P and ABS. When the raw sewage was supplied into the pre-chamical treatment facility, the removal of BOD and SS was 48.3% and 81.1%. However T-N removal was very low which means T-N consists of
mostly. T-P was almost completely recluced by the chemical addition. The effluent BOD & SS was 57~76 and 21~43mg/L, which could reduce the size of biological treatment facility. From the cost estimation pre-chemical treatment could save around half of the area required for biological treatment with post ceagulation.
Using Coagulant and Activated Carbon as Pretreatment for Membrane Fouling Control in MBR (Membrane Bioreactor)
Kim, Dong-Ha ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 122~127
The aim of this study was to investigate the characteristics of membrane fouling caused by soluble organic materials in a membrane bioreactor process. For the removal of filterable organic materials (FOC) smaller than
, coagulants and activated carbon were added. A membrane bioreactor using a submerged
metal sieve was operated in laboratory scale to examine the possibility of membrane fouling control. As the dosage of GAC and coagulant increased, the residual FOC concentration decreased and the permeate flow rate increased markedly. The permeate flux increased with an increased PACl addition at the range from 0 to 50 mg/l. At coagulant dosage of 27mg/l, the removal of FOC was about 46% and the flux increased to 3.5 times compared to the case without PACl addition. The permeate flux increased gradually with an increase in GAC dosage. At GAC dosage of 50mg/L, the permeate flux was about 2 times higher compared that for raw water. The particle in the range of
were removed effectively by the addition of GAC and coagulant. Higher osage of GAC and coagulant, led to higher removal of FOC. A different set of experiments was also performed to investigate the effect of pretreatment on the permeation ability of MBR system using the metal sieve membrane. After 40 hours of operation, the permeate flux was about 1,000 (
), which is 20 times higher compared to the results in literature. It is likely that combined pretreatment using coagulant and activated carbon was the most effective to resolve membrane fouling problems. Moreover, the continuous operations could be successful by applying this pretreatment method.
The Treatment of Box-mill Wastewater Using Aerobic Cometabolism Process - Practical Plant Test -
Cho, Yong Duck ; Lee, Sang Wha ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 128~137
This study aims at developing the practical technology in the treatment of box-mill wastewater using the aerobic co-metabolism principle. The conventional activated sludge method exhibited the removal efficiency of
as 30~50% and 40~50%, respectively. Color was rather increased by 30~130% because the conventional treatment under the aerobic condition did not induce the conversion of molecular structure of dyeing agents. Meanwhile, when the aerobic co-metabolism principle was applied to the same wastewater, the removal efficiency of
were obtained as 92~97% and 90~94%, respectively. In particular, color was significantly reduced down to 65~85%. The enhancement of treatment efficiency was ascribed to occur not only that the non-degradables were converted to the second substrates, but also that the enzyme activity was increased as MLVSS was kept 3000mg/l or more with the first substrates injected.
Evaluation of Design Parameter on Residuals Treatment Facilities in Membrane Water Treatment Plants
Moon, Yong-Taik ; Seo, In-Seok ; Kim, Hong-Suck ; Park, No-Suk ; Ahn, Hyo-Won ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 138~146
The characteristics of backwash and concentrate discharges depend upon the quality of the water being treated and the net recovery of the membrane system. This paper is to indicate a design methods on the capacities of residuals treatment facilities in membrane processes for drinking water. We operated a demonstration membrane plant with a recovery rate of 90% for designing G-water treatment plant. We investigated on design parameter (optimum coagulant dosage and surface loading rate etc.) to design efficiently the residuals treatment facilities. The settling test was conducted with 1m columns dosing PACl to kaolin and membrane residuals under the experimental condition that discharge permit was under a 60mg/L. When the quantity of membrane residuals was
, the estimated results for 1st thickener demonstrated the surface loading rate of 14.4m/day, detention time of 5.83hr, available depth of 3.5m.
The Effect of Sludge Settling Characteristics on Sludge-Water Interface Height Change Model
Park, Suk Gyun ; Kang, Seon-Hong ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 147~155
For the further study of the solids flux theory, several researchers have proposed models to predict sludge settling velocity for each different concentration by using sludge indexes, SVI, SSVI and
. It is difficult to apply the above models to predict sludge-water interface height in a batch column because sludge settling velocity changes while sludge settle down. While sludge settle down in a batch column, sludge concentration becomes high. The sludge concentration change is one of the most critical causes of the change of sludge settling velocity. Also, sludge concentration change causes of sludge index to change. SVI is more sensitive than SSVI or
to the change of sludge concentration. Each sludge has physical characteristics of its own which makes the settling velocity for each sludge different. The purpose of this study is to establish the correction factors that are able to compensate the errors derived from each different sludge settling characteristic by using sludge indexes, therefore the correction factors are applicable to the model for the change of sludge-water interface height.
Prediction of Sludge-Water Interface Height Change in Batch Column
Park, Suk Gyun ; Kang, Seon-Hong ;
Journal of Korean Society of Water and Wastewater, volume 20, issue 1, 2006, Pages 156~163
While sludge is settling in batch column, sludge concentration becomes high. Because the characteristic of sludge settling changes in function of time due to the sludge concentration change, the sludge settling velocity changes too. Also, because the sludge settling characteristic is influenced by a physical characteristic of sludge and a column height etc, it is difficult to exactly measure the sludge settling characteristic. Although the sludge volume indexes, SVI, SSVI and
, are used to predict sludge settling characteristic, these indexes are not reliable values. Because the previously established models for sludge settling velocity predict the sludge settling velocity only, it is difficult to predict sluge-water interface height by using those models. The purpose of this experiment is to establish the empirical model which predicts the sludge interface height change with respect to the sludge physical characteristic and the settling condition.