• Title, Summary, Keyword: Wastewater treatment plant

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Rice Cultivation with Reclaimed Wastewater Irrigation for Wastewater Reuse (하수처리수의 재이용을 위한 벼 재배시험)

  • Kang, Moon-Seong;Park, Seung-Woo;Kim, Sang-Min;Seong, Chung-Hyun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.1
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    • pp.75-86
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    • 2004
  • The objective of the research is to develop agricultural resue technologies of reclaiming the effluents from a municipal wastewater treatment plant and reusing for irrigated rice paddies. The Suwon wastewater treatment plant was selected for wastewater reuse tests. The control was the plots with groundwater irrigation (TR#1), the treatment (TR#2) using polluted stream water as it was, and three others using wastewater after treatment. Three levels of wastewater treatments were employed: the effluent from the wastewater treatment plant (TR#3), sand filtering after treatment plant(TR#4), and ultra-violet treatment after sand filtering (TR#5). The randomized block method was applied to wastewater application to paddy rice with five treatments and six replica. The effects of various wastewater treatment levels on water quality, paddy soil, crop growth, yields, and the health hazards were investigated. The primary results indicate that cultivating rice with reclaimed wastewater irrigation did not cause a problem to adverse effects on crop growth and yields. Overall, wastewater could be used as a practical alternative measure for reclaimed wastewater irrigation. However, long-term monitoring is recommended on the effects on soil chemical characteristics and its related health concerns.

A study on the application of the extreme value distribution model for analysis of probability of exceeding the facility capacity (시설용량을 초과하는 폐수량의 유입확률 분석을 위한 극치분포모델의 적용에 관한 연구)

  • Choi, Sunghyun;Yoo, Soonyoo;Park, Taeuk;Park, Kyoohong
    • Journal of Korean Society of Water and Wastewater
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    • v.30 no.4
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    • pp.369-379
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    • 2016
  • It was confirmed that the extreme value distribution model applies to probability of exceeding more than once a day monthly the facility capacities using data of daily maximum inflow rate for 7 wastewater treatment plant. The result of applying the extreme value model, A, D, E wastewater treatment plant has a problem compared to B, C, F, G wastewater treatment plant. but all the wastewater treatment plant has a problem except C, F wastewater treatment plant based 80% of facility capacity. In conclusion, if you make a standard in statistical aspects probability exceeding more than once a day monthly can be 'exceed day is less than a few times annually' or 'probability of exceeding more than once a day monthly is less than what percent'.

Effect of sewage flow on treatment efficiency of small scale wastewater treatment plant in rural community (농촌 지역에서 유입 유량이 소규모 하수처리장 처리 효율에 미치는 영향)

  • Im, Jiyeol;Gil, Kyungik
    • Journal of Wetlands Research
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    • v.18 no.3
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    • pp.267-274
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    • 2016
  • Sewerage supply in rural community is the important for water quality protection of water system such as river, lake and wetland. And characteristic of small scale wastewater system that have wide range of inflow and concentration in sewage should be considered for stable operation of small scale wastewater treatment plant. In this research, characteristics of flow ratio (flow / designed flow), effect on treatment efficiency of small scale wastewater treatment plant and assessment of optimal flow ratio were conducted through analysis on operation result of 18 small scale wastewater treatment plant in Bong-hwa gun. As a result, flow ratio shows the higher value during summer. However pollutants concentration in sewage was shown the higher concentration during autumn and winter. Treatment of small scale wastewater treatment plant is increased when flow ratio increased, and nutrient treatment efficiency is more sensitive to change of flow ratio than organic compound and suspended solids. According to this research result, it need to be maintained flow ratio 0.8 over value for stable treatment efficiency of small scale wastewater treatment plant.

Diagnostic Software for Wastewater Treatment Plant using Activated-Sludge Process (활성슬러지 폐수처리장 진단 소프트웨어)

  • 손건태;이재은
    • Journal of Environmental Science International
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    • v.8 no.5
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    • pp.611-616
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    • 1999
  • The diagnostic software for the wastewater treatment plant using activated-sluge process is developed in order to increase the efficiency of management of the wastewater treatment plant. This software is based on the expert system and the visualized user interface, including the diagnosis of quantitative and qualitative data. For the generalization of this software, the initialization of each unit process and updating the files can be possible.

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Application of ASM and PHOENICS for Optimal Operation of Wastewater Treatment Plant (하수처리장 운영의 최적화를 위한 ASM, PHOENICS의 적용)

  • Kim, Joon Hyun;Han, Mi-Duck;Han, Yung Han
    • Journal of Industrial Technology
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    • v.20 no.A
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    • pp.73-82
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    • 2000
  • This study was implemented to find an optimal model for wastewater treatment processes using PHOENICS(Parabolic, hyperbolic or Elliptic Numerical Integration Code Series) and ASM(Activated Sludge Model). PHOENICS is a general software based upon the laws of physics and chemistry which govern the motion of fluids, the stresses and strains in solids, heat flow, diffusion, and chemical reaction. The wastewater flow and removal efficiency of particle in two phase system of a grit chamber in wastewater treatment plant were analyzed to inquire the predictive aspect of the operational model. ASM was developed for a biokinetic model based upon material balance in complex activated sludge systems, which can demonstrate dynamic and spatial behavior of biological treatment system. This model was applied to aeration tank and settling chamber in Choonchun city, and the modeling result shows dynamic transport in aeration tank. PHOENCS and ASM could be contributed for the optimal operation of wastewater treatment plant.

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Studies on the Effluent Characteristics of Dyeing Wastewater by Textile Classification (섬유 형태에 따른 염색폐수 배출특성 연구)

  • Lee, Soo-Hyung;Park, Jung-Min;Park, Sang-Jung;Jeong, Je-Ho
    • Journal of Korean Society on Water Environment
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    • v.23 no.6
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    • pp.881-888
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    • 2007
  • In order to investigate the characteristics of the non-biodegradable material, the $BOD_5/COD_{Cr}$ ratio was used. The average ratio of industrial complex's influent wastewater was 2.29~2.96, the effluent ratio was 4.29~19.0. The removal efficiency of $UV_{254}$ by physicochemical treatment was 22.8~94.7% and 5.3~77.2% by biological treatment, respectively. Of the wastewater removal efficiency for each of the items, the $BOD_5$ treatment efficiency was the greatest at 97.3% and the color & TN treatment efficiency was 40~70%. The study of the economical assessment showed that the complex as well as the individual companies spent 722~1,298 won for each ton of treated wastewater. All of the wastewater treatment facilities spent the most money on chemicals needed to treat the wastewater. The total cost for Nylon manufacturing wastewater treatment plant was the greatest while the total cost for cotton manufacturing wastewater treatment plant turned out to the lowest. As respects of removal efficiency and economocal assessment, Polyester A and Cotton manufacturing wastewater treatment plants were better effective than a dyeing industrial complex wastewater treatment plant.

Analysis of Attached Algae and Microbial Community Structure in Sedimentation Basin of Water and Wastewater Treatment Plant (정수 및 하수처리공정 중 침전지 부착조류 및 미생물 군집구조 해석)

  • Lim, Byung-Ran;Ahn, Kyu-Hong;Song, Kyung-Gun;Park, Yu-Jung;Jun, Dae-Young
    • Journal of Korean Society of Water and Wastewater
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    • v.19 no.1
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    • pp.61-67
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    • 2005
  • The objective of this study was to investigate community structure of attached algae and microbes in sedimentation basin of water and wastewater treatment plants by using respiratory quinone profile. There was an evident difference, in microbial community structure and attached algae species, between inclination plate settler and drainage canal in the sedimentation basin. The algae was composed of species in following order; Chlorophyceae>Bascillariophyceae>Cyanophyceae. The dominant quinone types of attached microorganisms in the wastewater treatment plant were plastoquinone (PQ)-9, vitamin(V)K-1 followed by UQ-8, but those for water treatment plant were VK-1, PQ-9 followed by UQ-8. These results suggests that nutrients, seasons and material of sedimentation basin have notable influence on composition of attached algae and microbial community structure in water and wastewater treatment plants.

Quantification of Bacillus Species in a Wastewater Treatment System by the Molecular Analyses

  • Mori Koji;Iriye Ryozo;Hirata Mutsunori;Takamizawa Kazuhiro
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.9 no.6
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    • pp.482-489
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    • 2004
  • Bacillus species were observed and quantified by molecular approaches, using the 16S rDNA primers/probes, in a wastewater treatment plant designed for the purpose of stimulating the growth of Bacillus species. The plant has been operating as a test plant since 1997 in the city of Ina, Japan, with excellent treatment performance. Observations by in situ hybridization, using Bacillus-specific probes, indicated that Bacillus strains were inhabited in the plant and their num­bers decreased during the treatment process. Similar results were obtained from a quantitative PCR analysis using a Bacillus-specific primer set, and the amount of DNA originating from various Bacillus species was maximally $1.91%\$ of the total DNA in the wastewater treatment tank. Clone library analysis using the Bacillus-specific primers suggested that, while the population was no­ticeably increased, the phylogenetic diversity of the increasing Bacillus species was very low.

A Study of Optimum Operational Methods for Domestic Wastewater Treatment Plants in Korea (국내 하수종말처리장 최적 운전 방안에 관한 연구)

  • Lee, Byong-hi;Lee, Woung-Woon
    • Journal of Korean Society of Water and Wastewater
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    • v.14 no.1
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    • pp.45-53
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    • 2000
  • The optimum operation of domestic wastewater treatment plant can give influence on operational cost and future expansion in Korea where has 93 operational domestic wastewater treatment plants. Also, the study on optimum operation can reduce operation cost and budget of municipalities whom have responsibility of wastewater treatment plant operation. In this study, 9 domestic wastewater treatment plants which can represent 93 plants in Korea have been selected and operational data are gathered. The collected data are inputted to computer simulator based on IAWQ's Activated Sludge Model No.1 and optimum operation methods are developed. Also, the electric power for aeration which has large portion of overall operation cost are calculated based on design and operation conditions and these are compared. In this study, it was found that design wastewater characteristics are 1.6 times higher than those of daily maximum except for E plant and that estimation methods for design wastewater characteristics have to be improved. Based on computer simulation, we found there is no need to operate all aeration tanks due to weak influent overall power for aeration can be reduced to about 43% of design one.

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