• Title/Summary/Keyword: pollution reduction

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A Study on the Perception and Attitude towards Food Waste Reduction by the Elementary School Pupils (부산지역 초등학생들의 음식물쓰레기 감량에 대한 인식 및 태도 연구)

  • 김소희;류은순
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.31 no.6
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    • pp.1155-1162
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    • 2002

  • Food waste in school foodservices is an important factor in managing expense or evaluating the acceptance of served meals and a serious environmental hazard factor in all countries. In this study, the perception and attitude towards food waste reduction and the recognition of environmental pollution of students from elementary school foodservices in Busan, Korea were investigated. The questionnaire was responded by 519 students (boy: 255, girl: 264) in the third and sixth grades. School lunch programs were proved to contribute to the improvement of students' food intake habits. The perception and attitude towards food waste reduction of the third grade students (3.61/3.73) were significantly higher than those of the sixth grade students (3.46/3.59) (P<0.01). Food waste education made a significant impact on the perception and attitude on food waste (p<0.01). When dislike food was supplied the students having the higher perception and attitude towards food waste reduction ate it more than those having the lower perception and attitude. The major reason for plate waste was shown to be influenced by the taste and amount of foods supplied in school lunch programs. Most of students recognized that food waste pollution (4.22) was one of the severest problems among the environmental pollutions, followed by air (4.13), tap water (4.09) soil (3.78), noise (3.55) pollution. The students separated the garbage in the house (72.6%) better than in school and the outside (55.2%). The perception of food waste was positively correlated with the attitude toward reduction of food waste and the recognition of environmental pollution (p<0.01). The attitude toward reduction of food waste was also positively correlated with meal quantity taken (p<0.01).

  • https://doi.org/10.3746/jkfn.2002.31.6.1155 인용 PDF KSCI

Biodegradable Check Dam and Synthetic Polymer, its Experimental Evaluation for Turbidity Control of Agricultural Drainage Water

  • Kim, Minyoung;Kim, Seounghee;Kim, Jinoh;Lee, Sangbong;Kim, Youngjin;Cho, Yongho
    • Korean Journal of Soil Science and Fertilizer
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    • v.46 no.6
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    • pp.458-462
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    • 2013

  • A drainage ditch is normally a component of drainage networks in farming systems to remove surplus water, but at the same time, it may act as a major conduit of agricultural nonpoint source pollutions such as sediment, nitrogen, phosphorus, and so on. The hybrid turbidity reduction system using biodegradable check dam and synthetic polymer was developed in this study to manage pollutant discharge from agricultural farmlands during rainfall events and/or irrigation periods. The performance of this hybrid system was assessed using a laboratory open channel sized in 10m-length and 0.2m-width. Various check dams using agricultural byproducts (e.g., rice straw, rice husks, coconut fiber and a mixture of rice husks and coconut fiber) were tested and additional physical factors (e.g., channel slope, flowrate, PAM dosage, turbidity level, etc.) affecting on turbidity reduction were applied to assess their performance. A series of lab experiments clearly showed that the hybrid turbidity reduction system could play a significant role as a supplementary of Best Management Practice (BMP). Moreover, the findings of this study could facilitate to develop an advanced BMP for minimizing nonpoint source pollution from agricultural farmlands and ultimately to achieve the sustainable agriculture.

  • https://doi.org/10.7745/KJSSF.2013.46.6.458 인용 PDF KSCI

Estimation of Real-Driving NOx Emission Characteristics from Light-Duty Diesel Vehicles with PEMS (PEMS를 이용한 소형 경유차의 실주행 NOx 배출특성 평가)

  • Park, Yeon Jae;Kwon, Sang Il;Park, Jun Hong;Lee, Jai Young
    • Journal of Korean Society for Atmospheric Environment
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    • v.31 no.6
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    • pp.562-572
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    • 2015

  • $NO_x$ emissions from diesel vehicles have been regarded as a main cause of high $NO_2$ concentration in metropolitan area. Recent studies have shown that the on-road $NO_x$ emissions of diesel vehicles are quite higher than the emission limits specified with the pre-defined test method for emission certification. To reduce air pollutants effectively, the discrepancy of emissions in certification and real-driving conditions should be tackled. In this study, the real-driving emissions have been estimated with portable emission measurement system (PEMS). The results of this study have shown that the on-road $NO_x$ emissions from diesel vehicles have been decreased as the introduction of stricter emission regulation, EURO-6, but additional reduction should be still required and robust technologies should be applied to control $NO_x$ in real-driving conditions. RDE-LDV (Real Driving Emission - Light Duty Vehicles) test method being developed in the European Union can represent excessive on-road $NO_x$ emissions of diesel vehicles as applied emission technologies and can be a solution to remove discrepant $NO_x$ emissions between certification and Korean real-driving conditions. Among the $NO_x$ reduction technologies for EURO-6 diesel vehicles, selective catalytic reduction (SCR) system has shown the better performance than lean $NO_x$ trap (LNT) system to control on-road $NO_x$ emissions. Implementing RDE-LDV will require vehicle manufacturers to adopt the more effective $NO_x$ reduction technology in real driving conditions.

  • https://doi.org/10.5572/KOSAE.2015.31.6.562 인용 PDF KSCI