• Title, Summary, Keyword: effluent

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Investigation of Effluent of Wastewater Treatment Plants for Agriculture Reuse (농업용수재이용을 위한 하수처리장 현황조사)

  • Lee, Gwang-Ya;Kim, Hae-Do;Jeong, Gwang-Geun;Lee, Jong-Nam
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • pp.521-526
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    • 2005
  • Water Quality of effluent from wastewater treatment plants was reviewed to reuse effluent for agricultural water as alternative water resources. Among 2004, wastewater treatment plants, 19 plants are found to be used as wastewater resources applicable to irrigation. The total effluent capacities are 9,293 thousand $m^3$per day, which may be used to irrigate paddy fields. In order to know how much the effluent can be use for agricultural water, we classified the effluent according to the river basin area and evaluated the water quality of the effluent.

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Study on Antibiotic Resistant Bacteria in Surface Water Receiving Pharmaceutical Complex Effluent (제약공단 방류수 유입 하천에서의 항생제 내성 bacteria에 관한 연구)

  • Kim, Young Jin;Kim, Young Gyu
    • Journal of Environmental Health Sciences
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    • v.42 no.6
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    • pp.409-418
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    • 2016
  • Objectives: The purpose of this study was to characterize penicillin G resistant bacteria in surface water from pharmaceutical complex effluent. Methods: Surface water was sampled from pharmaceutical complex effluent in Gyeonggi-do Province, Korea in March 2015. Water samples were plated in triplicate on tryptic soy agar plates with 32 mg/L of penicillin G. Penicillin G resistant bacteria were selected from the effluent and subjected to 16S rRNA analysis for the penicillin G resistant species determination. Identified resistant strains were tested for resistance to various antibiotics. Results: Penicillin G resistant bacteria were present at 8.0% in terms of culturable heterotrophic bacteria. Identified penicillin G resistant bacteria exhibited resistance to more than nine of the antibiotics studied. These resistant bacteria are gram negative and are closely related to pathogenic species. Conclusion: Multi-antibiotic resistant bacteria in the surface water of pharmaceutical complex effluent suggest the need for disinfection and advanced oxidation processed for pharmaceutical effluent.

Genotoxic and Neurotoxic Potential in Marine Fishes Exposed to Sewage Effluent from a Wastewater Treatment Plant

  • Park, So-Yun;Kim, So-Jung;Rhee, Yong;Yum, Seung-Shic;Kwon, Tae-Dong;Lee, Taek-Kyun
    • Molecular & Cellular Toxicology
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    • v.5 no.3
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    • pp.265-271
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    • 2009
  • Concentrations of industrial, agricultural and natural chemicals have been increasing in secondary effluents without their combined sub-lethal effects having been elucidated. In this study, two assays (the comet and acetylcholinesterase assays) were combined to evaluate the genotoxic and neurotoxic effects of effluent from the Noksan wastewater treatment plant (WWTP) on two local marine fish species (flounder and sea eel). The fish were exposed to WWTP secondary effluent that had been diluted with filtered seawater to final concentrations of 1%, 10% and 50%. Analysis of fish samples collected 3 and 5 days after exposure showed that DNA damage occurred in flounder exposed to 50% effluent and in sea eels exposed to 10% or 50% effluent. Furthermore, it was found that acetylcholinesterase (EC:3.1.1.7, AChE) activity decreased in both species when exposed to 10% effluent, indicating the presence of large amounts of genotoxic and neurotoxic chemicals in the effluent. Our results indicate that the comet and AChE assays are promising tools for biomonitoring of secondary effluents.

Cooling Performance of Ground source Heat Pump using Effluent Ground Water (유출지하수 열원 지열히트펌프시스템의 냉방성능)

  • Park, Geun-Woo;Nam, Hyun-Ku;Kang, Byung-Chan
    • New & Renewable Energy
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    • v.3 no.4
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    • pp.47-53
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    • 2007
  • Effluent ground water overflow in deep and broad ground space building. Temperature of effluent ground water is in $12{\sim}20^{\circ}C$ annually and the quality of that water is as good as living water. Therefore if the flow rate of effluent ground water is sufficient as source of heat pump, that is good heat source and heat sink of heat pump. Effluent ground water contain the thermal energy of surrounding ground. So this is a new application of ground source heat pump. In this study open type and close type heat pump system using effluent ground water was installed and tested for a church building with large and deep ground space. The effluent flow rate of this building is $800{\sim}1000ton/day$. The heat pump capacity is 5RT each. The heat pump cooling COP is $4.9{\sim}5.2$ for the open type and $4.9{\sim}5.7$ for close type system. The system cooling COP is $3.2{\sim}4.5$ for open type and $3.8{\sim}4.2$ for close type system. This performance is up to that of BHE type ground source heat pump.

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Comparison between Ecotoxicity using Daphnia magna and Physiochemical Analyses of Industrial Effluent (산업폐수에 대한 이화학적 분석과 물벼룩 생태독성의 비교)

  • Lee, Sun Hee;Lee, Hak Sung
    • Journal of Environmental Science International
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    • v.23 no.7
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    • pp.1269-1275
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    • 2014
  • Ecotoxicity assessments with the physiochemical water quality items and the bioassay test using Daphnia magna were conducted for 18 selected effluents of 6 industrial types (metal processing, petroleum refining, synthetic textile manufacturing, plating, alcohol beverage manufacturing, inorganic compound manufacturing) being detected toxicity from industrial effluent in Ulsan city, and the interrelationship between total toxic unit (${\Sigma}TU$) and concentrations of Water Quality Conservation Act in Korea were investigated. The average toxic unit(TU) of effluents for 6 industrial types displayed the following ascending order: petroleum refining (0.2) < synthetic textile manufacturing (0.6) < alcohol beverage manufacturing (0.9) < metal processing (1.3) ${\leq}$ inorganic compound manufacturing (1.3) < plating (3.0). These values were less than effluent permission standard. Based on the result of substances causing ecotoxicity, the correlation analysis was not easy because most of heavy metals were not detected or were less than effluent permission standard. Toxicological assessment of industrial effluent was suitable for the evaluation of the mixture toxicity for pollutant. The whole effluent toxicity test using a variety of species was needed for the evaluation of industrial wastewater.

Pond System for Further Polishing of Constructed Wetland Effluent during Winter Season (연못을 이용한 동절기 인공습지 오수처리수의 추가 처리)

  • Yoon, Chun-Gyeong;Jeon, Ji-Hong;Kim, Min-Hee;Ham, Jong-Hwa
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.44 no.4
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    • pp.139-148
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    • 2002
  • Pilot study was performed to examine the feasibility of the pond system for further polishing of treatment wetland effluent from December 2000 to June 2001. The wetland system used for the experiment was highly effective to treat the sewage during the growing season, but it was less effective and its effluent was still high to discharge to the receiving water body. Therefore, the wetland effluent may need further treatment to prevent water quality degradation. Pond system could be used to hold and further polish the wetland effluent during the winter season and ots feasibility was evaluated in this study. Additional water quality improvement was apparent in the pond system during winter season, and the pond effluent could be good enough to meet the effluent water quality standards if it is properly managed. Timing of the pond effluent discharge appears to be critical for pond system management because it is a closed system and whole water quality constituents are affected by physical, chemical, and biological pond environments. Once algae started to grow in mid-April, constituents in the pond water column interact each other actively and its control becomes more complicated. Therefore, upper layer of the pond water column which is clearer than the lower layer my need be discharged in March right after ice cover melted. In the experiment, water quality of the upper water column was markedly clear in March than ant other times probably because of freezing-thawing effect. The remaining lower water column could be further treated by natural purification as temperature goes up or diluted with better quality of wetland effluent for appropriate water uses. This study demonstrated the feasibility of pond system for subsequent management of wetland effluent during the winter season, however, more study is needed for field application.

The Effect of Industrial Waste Water Effluent Charge Reform (수질배출부과금제도 개선 방안 연구)

  • Min, DongKi
    • Environmental and Resource Economics Review
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    • v.18 no.4
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    • pp.767-785
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    • 2009
  • This paper studies the effect of industrial waste water effluent charge reform. The goal of the present effluent charge system is to use environmental resources in an efficient way by charging the cost for removing emitted water pollutants. However, the present system is a type of regulation instead of providing economic incentives to the industry. That is, if a firm emits pollutants greater than the limit, it has to pay an amount greater than the cost of cleaning them taking into account the amount of waste water discharged, region, the number of violation and the level of density of pollutants. However, the excessive fees have resulted in the lowest ratio of revenue-to-effluent charge among all environmental charges. The paper estimates the effect of the change in effluent fee and revenue when the present effluent charge system is converted to one that offers economic incentives. The results show that the amount of waste water effluent charge is about four times larger than the estimated environmental cleaning cost. In addition, the results show that by modifying the effluent charge system, the ratio of revenue to effluent charge can be raised.

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A study on Determination Method of the Compliance Concentration of Effluent Limitation from Public Sewage Treatment Works in the Jinwee-stream Watershed Sewer System (유역하수도 공공하수처리시설의 방류수 수질 준수농도 설정방안 연구: 진위천 수계를 중심으로)

  • Jeong, Dong-Hwan;Cho, Yangseok;Kim, Youngseok;Ahn, Kyunghee;Chung, Hyen-Mi;Kwon, Ohsang
    • Journal of Korean Society of Water and Wastewater
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    • v.29 no.4
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    • pp.493-502
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    • 2015
  • In accordance with the Watershed Sewer System Maintenance Plan enforced on February 2, 2013, the different compliance concentration of effluent limit be applied to effluent discharged from public sewage treatment works(PSTWs) in each watershed on the basis of water quality thereof. With the introduction of watershed sewer system, it is necessary to set the compliance concentration of effluent limit for PSTWs situated in the watershed, by region and PSTW size, to achieve water quality criteria for regional watersheds or target water quality under TMDL program. Watershed Environmental Agencies establish the Watershed Sewer System Maintenance Plan and set the compliance concentrations of effluent limit for PSTWs under the plan. The agencies plan to apply tougher effluent BOD concentration limits in Class I to IV areas. Effluent BOD concentration limits will be toughened from 5~10 mg/L to 3 mg/L in class II~III areas, from 10mg/L to 5mg/L in class IV areas. Uniform application of effluent BOD concentration limits to PSTWs in the watershed sewer system need to be complemented considering type of sewage treatment technology employed and watershed characteristics. Therefore, this study presents method to determine the compliance concentration of effluent limit from PSTWs in the watershed.

Near-Field Mixing Characteristics of Submerged Effluent Discharges into Masan Bay

  • Kang, See-Whan;You, Seung-Hyup;Na, Jung-Yul
    • Ocean and Polar Research
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    • v.22 no.1
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    • pp.45-56
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    • 2000
  • Hydrodynamic mixing characteristics of submerged effluent discharges into Masan Bay were investigated by both field observations and numerical model simulations. CORMIX model, a length-scale mixing model, was adopted to obtain the near-field dilution and wastefield characteristics of the effluent discharges into Masan Bay. Model predictions of the near-field dilution rates were in a good agreement with field observations in summer and winter seasons. Seasonal variations in the dilution rates showed that the highest dilution rate was obtained in winter while the lowest dilution rate was in summer. As the effluent discharges are increased with the treatment capacity expansion to be completed by 2011, the dilution rates are expected to be much reduced and the near-field stability of the wastefields will become unstable due to the increased effluent discharges.

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Thermal Effluent through Extruded Side Channel

  • Yoon, Tae-Hoon;Yook, Woon-Soo;Yi, Young-Kon
    • Korean Journal of Hydrosciences
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    • v.6
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    • pp.67-79
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    • 1995
  • The reattachment of buoyant efflluent to a shore in a crossflow is investigated experimentally. The effluent is prodeced by discharging heated water through a projected side channel into a confined crossflow of the same depth. In the projecting effluent, the size of recirculating region, which is formed by deflected thermal plume on the lee of the effluent, tends to increase, but the maximum temperature decreases in the direction of the crossflow and it has more uniform transverse spreading compared to non-projected type. The heat flux across the crossflow is found to be independent of the projceted length of the side channel under relatively high buoyancy flux on the contrary to low buoyancy flux. The reattachment of th effluent can be specified by both velocity ratio and densimetric Froude number, whereas only the velocity ratio is governing factor to the reattachment of the effluent in the case of non-projecting type.

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