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Considerations on the Application of Food Waste Disposer in S. Korea
( Munsol Ju ),( Jae Young Kim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
Food waste disposer has been tried again in S. Korea. We examined the background and the considerations when food waste disposer is applied in S. Korea. The first one is disposer performance and the second one is plumbing design, and the last one is the method of wastewater treatment. The most controversial issue is solid recovery rate in using food waste disposer. It is regulated as recovering more 80% of input solid or draining less 20% of input solid. With making standards on disposer performance and plumbing design, more reasonable regulations on solid utilization is necessary based on integrated assessment.
Microplastic Fiber Generation from Washing Textiles and the Flows in South Korea
( Munsol Ju ),( Jeonggue Park ) 한국폐기물자원순환학회 2022 ISSE 초록집 Vol.2022 No.-
Various experimental studies have been conducted on the generation of microfibers during washing, however, limitations are pointed out when scaling up fragmentary experimental results to a national scope. It is necessary to estimate the amount of generation of microfibers at the national level by considering the various factors affecting the generation of microfibers and the ratio of those factors expressed in actual washing habits. It is also necessary to analyze the actual flow considering sewer system. In this study, we identified the actual washing habits for the factors affecting the generation of microfibers (fleece, kind of detergent, laundry input amount per wash, lint filter) through consumer survey, and derived the multiplier coefficient of Korea washing habit. Based on the basic conditions of the reference experiments (general polyester, liquid detergent, input of 3.5 kg or more, no filter), the multiplier coefficient of Korea washing habit was determined as 1.986. Washing amount of fleece is only 0.55% in all laundries, but the impact of microfiber generation is the largest compared to other washing habits. Lint filter use is key factor to reduce microfiber generation. In addition, as a result of analyzing the flow of microfibers considering sewer system, 10% of generated microplastic fibers flowed out into water environment. The contribution of untreated wastewater due to misconnection of separated sewer system is the highest. It is followed by treated wastewater from sewage treatment plants and then combined sewer overflows(CSOs).
Global Changes on Transboundary Movement of Plastic Waste and the Impacts on Recycling System
( Munsol Ju ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
South Korea was a net export country for plastic waste before 2017, but it has become a net import country since the national sword policy of China started in 2018. Other developed countries also have been experienced the big changes on transboundary movement of plastic waste and have been faced on the difficulty to treat plastic waste with domestic capacity because big portion of global plastic recycling had relied on China. This study analyzed the global plastic flow changes and investigated the urgent situation in the world using press released materials. For strategies on plastic waste in developed countries, there are largely four patterns: finding new market, treatment (including incineration) facility enlargement, reduction of contaminants from generation sources, generation reduction and improvement on recycling system. Developing countries, which have been regarded as new markets for plastic waste, have started the import ban policies similar to China. Korea needs new strategies on exporting and importing waste in the viewpoint of both resource security and hazardous risk management. This study explored domestic challenges on plastic recycling industry.
주문솔 ( Munsol Ju ),이희선 ( Hisun Lee ),박정규 ( Jeonggue Park ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2019 No.-
플라스틱에 의한 섭식장애, 조임, 갇힘 등으로 해양 생태계에 미치는 부정적인 영향에 대한 우려가 높아지고 있으며, 이러한 해양오염은 생태계 파괴뿐 아니라 결국 인간의 먹거리 안정성 및 건강 피해로 이어져 대책 마련이 요구되는 상황이다. 미세플라스틱의 정의는 통상적으로 5mm 미만으로 정의되며 발생유형에 따라 1차와 2차로 구분된다. 국제기구나 EU에서 규정하고 있는 1차 미세플라스틱은 연마나 물성변화를 위해 의도적으로 제품에 사용된 작은 입자 형태의 플라스틱을 의미하고, 2차 미세플라스틱은 5mm이상의 플라스틱이 광분해나 기계적 마모에 의해 미세화되어 발생하는 플라스틱을 의미한다. 반면, 이러한 2차 미세플라스틱은 다시 인간 활동(사용 중 마모 등)에 의해 미세화되는 것과 자연(광분해, 침식 등)에 의해 미세화되는 것으로 구분될 수 있으며 각 유형에 따라 관리 전략이 달라질 수 있다. 본 연구에서는 국내외에서 규정되고 있는 미세플라스틱의 정의와 발생유형을 살펴보고, 2차 미세플라스틱의 발생유형별 관리 전략에 대해 모색한다. 또한, 미세플라스틱 관리 관점에서 플라스틱에 대해 해양 환경 중 오염도, 분해특성, 소비량 등 우선 관리 대상 선정 기준을 논의한다.