• Title/Summary/Keyword: Agricultural wastewater

Search Result 308, Processing Time 0.035 seconds

Economic Analysis of Wastewater Reuse Systems for Agricultural Irrigation using a System Dynamics Approach (시스템 다이내믹스를 이용한 농업용수 재이용시스템 경제성 분석)

  • Jeong, Han Seok;Suh, Kyo;Jang, Tae Il;Seong, Choung Hyun;Kim, Hak Kwan;Park, Seung Woo
    • Journal of The Korean Society of Agricultural Engineers
    • /
    • v.55 no.2
    • /
    • pp.9-20
    • /
    • 2013
  • Many studies have reported additional treatment is needed to use wastewater for agricultural purpose. Economic considerations should be taken into account to establish infrastructure for agricultural reuse because of a large amount of water use in irrigation and relatively low water quality requirement. The objective of this study was to conduct economic analysis of wastewater reclamation and reuse systems for agriculture. A system dynamics approach considering complexity and dynamics in the wastewater reuse systems was used for the economic analysis, which are related with social, environmental, and economic problems. Sensitivity and benefit cost analysis for wastewater reuse systems was conducted through the established economic assessment model. The result of sensitivity analysis showed that water resources development and installation cost were the most sensitive for total benefits and costs, respectively. The scenario-based test of the organized economic assessment model shows marginal cost ranges and enables decision-makers to decide reasonable cost for the wastewater reuse systems for agriculture.

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
    • /
    • v.46 no.1
    • /
    • pp.75-86
    • /
    • 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.

Surveying for Potential Wastewater Resources Applicable to Agricultural Irrigation. (하수처리수의 농업용수 재이용 자원 기초조사)

  • Chun, Man-Bok;Kim, Jin-Taek;Chung, Kwang-Kun
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 2002.10a
    • /
    • pp.89-92
    • /
    • 2002
  • Among 172 wastewater treatment plants, eighty eight plats are found to be qualified for potential wastewater resources applicable to agricultural irrigation. The total effluent capacities are 4,042 thousand tonnes per day, which may be used to irrigated paddy fields of $156\;km^2$. Preliminary surveys have been made to inquire farmers and water managers about their preference for wastewater reuse. All of them expressed their willingness to accept the wastewater reuse. The surveyed water managers suggested microbiological treatments be made and exclusive prove for safety of wastewater irrigation be prerequisite to the practices. Further surveys with experts and water managers throughout the nation are needed before any conclusions are made.

  • PDF

Simultaneous Removal of Organic Pollutants, N, P, and Antibiotics from Liquid Fertilizer using a Microbubble and Catalyst Coupling System (마이크로버블/촉매 융합 시스템을 이용한 액비 내 유기오염물질, N, P 및 항생제 동시 제거)

  • Lee, Dong Gwan;Sim, Young Ho;Paek, Yee;Kwon, Jin Kyung;Jang, Jae Kyung
    • Journal of Environmental Science International
    • /
    • v.28 no.11
    • /
    • pp.983-991
    • /
    • 2019
  • This study investigated the use of a hydroxyl-radicals-generated microbubble/catalyst (MB/Cat) system for removing organic pollutants, nitrogen, and phosphorous from liquid fertilizer produced by livestock wastewater treatment. Use of the MB/Cat system aims to improve the quality of liquid fertilizer by removing pollutants originally found in the wastewater. In addition, a reduction effect has been reported for antibiotics classified as representative non-biodegradable matter. Samples of liquid fertilizer produced by an aerobic biological reactor for swine wastewater treatment were first analyzed for initial concentrations of pollutants and antibiotics. When the MB/Cat system was applied to the liquid fertilizer, TCOD, TOC, $BOD_5$, and $NH_3-N$, and $PO_4-P$ removal efficiencies were found to be approximately 52%, 51%, 30%, 21%, and 66%, respectively. Additionally, Amoxicillin hydrate was removed by 10%, and Chlortetracycline HCl and Florfenicol were not present at detectable levels These findings confirm that the MB/Cat system can be used with livestock wastewater treatment to improve liquid fertilizer quality and to process wastewater that is safe for agricultural re-use.

Environmental Effects Analysis by the Fertilizer Change with Wastewater Reuse in Paddy Fields (하수처리수의 농업용수 재이용시 시비량 변화에 따른 환경영향 분석)

  • Jang, Tea-Il;Park, Seung-Woo;Cho, Jae-Young
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 2005.10a
    • /
    • pp.643-648
    • /
    • 2005
  • The objective of this paper is to analyze the environmental effects by the fertilizer change with wastewater reuse for agriculture. For this research, Lysimeter tests are being implemented to cultivate rice with different levels of fertilizer applications with wastewater irrigation., and to analyze the nutrient loading by wastwater reuse in paddy fields was examined the CREAMS-PADDY model. CREAMS-PADDY model is modified from CREAMS model for considering the hydrologic cycles in paddy field. As a result, in the lysimeter treated by irrigation with wastewater and chemical fertilizer with half of the conventional amount showed generally similar tendency to the control plot. This may require the modifications of standard cultural practices for rice in terms of fertilizer and pesticide applications. However, high concentration of sodium in wastewater might cause damage to physico-chemical properties of paddy soil. And the wastewater reuse effects on nutrient loads were quantitatively analyzed and this results provide the reasonable management for agricultural reuse.

  • PDF

Improved Electricity Generation by a Microbial Fuel Cell after Pretreatment of Ammonium and Nitrate in Livestock Wastewater with Microbubbles and a Catalyst

  • Jang, Jae Kyung;Kim, Taeyoung;Kang, Sukwon;Sung, Je Hoon;Kang, Youn Koo;Kim, Young Hwa
    • Journal of Microbiology and Biotechnology
    • /
    • v.26 no.11
    • /
    • pp.1965-1971
    • /
    • 2016
  • Livestock wastewater containing high concentrations of ammonium and nitrate ions was pretreated with microbubbles and an Fe/MgO catalyst prior to its application in microbial fuel cells because high ion concentrations can interfere with current generation. Therefore, tests were designed to ascertain the effect of pretreatment on current generation. In initial tests, the optimal amount of catalyst was found to be 300 g/l. When 1,000 ml/min $O_2$ was used as the oxidant, the removal of ammonium- and nitrate-nitrogen was highest. After the operating parameters were optimized, the removal of ammonium and nitrate ions was quantified. The maximum ammonium removal was 32.8%, and nitrate was removed by up to 75.8% at a 500 g/l catalyst concentration over the course of the 2 h reaction time. The current was about 0.5 mA when livestock wastewater was used without pretreatment, whereas the current increased to $2.14{\pm}0.08mA$ when livestock wastewater was pretreated with the method described above. This finding demonstrates that a 4-fold increase in the current can be achieved when using pretreated livestock wastewater. The maximum power density and current density performance were $10.3W/m^3$ and $67.5W/m^3$, respectively, during the evaluation of the microbial fuel cells driven by pretreated livestock wastewater.

Statistics and Probability Distribution of Total Coliforms in Wastewater (하수에서의 대장균수 확률분포 특성 분석)

  • Jun, Sang Min;Song, Inhong;Jeong, Han Seok;Kang, Moon Seong;Park, Seung Woo
    • Journal of The Korean Society of Agricultural Engineers
    • /
    • v.55 no.3
    • /
    • pp.105-111
    • /
    • 2013
  • Probability distribution of microbes in wastewater is a crucial factor to be determined for microbial risk assessment associated with its reuse. The objective of this study was to investigate probability distribution of an indicator microorganism in wastewater. Daily total coliform counts measured from nationwide wastewater treatment plants in 2010 by the Ministry of Environment were used for statistical analysis. Basic statistics and probability distributions were estimated in the three different spatial scales using the MS Excel software and FARD2006 model. Overall, wastewater from manure and livestock treatment plants demonstrated greater median coliform counts than from sewage and village treatment plants. Generalized logistic (GLO) and 2-parameter Weibull (WBU2) appeared to be the two probability distributions that fitted best for total coliform numbers in wastewater. The study results of microbial statistics and probability distributions would provide useful data for quantitative assessment of microbial risk from agricultural wastewater reuse.

A Study on Agricultural the Treatment of Organic Phosphorous Agricultural Pesticides Wastewater by the Activated Sludge Process (활성슬러지공정에 의한 유기인계 농약폐수처리)

  • 최택열;최규철
    • Journal of Environmental Health Sciences
    • /
    • v.21 no.2
    • /
    • pp.36-41
    • /
    • 1995
  • In order to treat effectively various type of wastewater discharged from the manufacture factory of organic phosphorous agricultural pesticides by the activated sludge process. The acclimation test of sludge was carried out by the dilution of completely mixed raw wastewater. The results of experiment were obstained as follows. 1. The moderate dilution rate of mixed raw wastewater was founded to about 30 times. 2. The available range of BOD-SS loading was 0.1~0.15 $kg\cdot BOD/kg\cdot SS\cdot day$ and it was similar to the case of extended aeration activated sludge process. 3. After the acclimation of activated sludge, the concentration of MLSS was 2000 mg/L, removal efficiency of BOD more than 90%, and SVI 100, respectively. 4. The oxygen respiratory rate of acclimated sludge was $47 mg\cdot O_2/g\cdot hr$ and this was increased about 5 times than $10 mg\cdot O_2/g\cdot hr$ of ordinary sludge.

  • PDF

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
    • /
    • 2005.10a
    • /
    • pp.521-526
    • /
    • 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.

  • PDF

Rice Growth Response and Soil Quality by Domestic Wastewater Irrigation on Rice Paddy Field - Lysimeter experiment - (하수종말처리장 방류수를 논 관개용수로 처리시 벼 생육 및 토양환경 영향 조사 - 라이시미터 재배실험 -)

  • Cho, Jae-Young;Park, Seung-Woo;Son, Jae-Gwon;Park, Bong-Ju;Li, Long-Gen
    • Journal of Korean Society of Rural Planning
    • /
    • v.12 no.2 s.31
    • /
    • pp.49-56
    • /
    • 2006
  • The application of domestic wastewater on rice paddies results in the accumulation of sodium(Na$^+$) to the soil. Excessive concentration of sodium may cause the deterioration of the physical characteristics of the soil, change in the osmosis of the soil, destruction of soil aggregates as well as ion toxicity due to sodium accumulation. Using domestic wastewater as irrigation water should be preceded by measures to prevent or control the soil salinization caused by sodium. Agricultural reuse of domestic wastewater were found not to cause serious problems with food safety due to heavy metals. However, pre-treatment using ultraviolet or ozone is recommended to reduce the number of bacteria and gem and for public health reasons. Using domestic wastewater has shown that reducing the standard application of chemical fertilizers by as much as 50% reduced the harvesting index by only 10%. This study has shown that it is feasible to reuse domestic wastewater on rice paddies. In order to facilitate the application, it is deemed necessary to establish wastewater treatment technologies in the future, to review criteria for recycling domestic wastewater for agricultural purposes such as conditions of soil and cropping system and to resolve conflicts with farmers and public health issues.