• 한국토양비료학회지
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• 제46권6호
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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.

• 대한환경공학회지
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• 제27권8호
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• pp.837-843
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• 2005

한외여과 공정의 전처리 공정으로 응집을 적용하였으며, 막여과 공정에 미치는 응집공정의 영향을 평가하였다. 예상되는 응집 효과는 수질 개선, 막오염 저감 및 역세척 효율 향상 등이며, 응집 한외여과 막여과 공정을 연속운전을 통해 조사하였다. 이때 적용된 응집제는 황산반토, PACS, 염화제2철이다. 연구 결과 응집을 통해 처리수 수질을 크게 향상 시킬 수 있었으며, 현탁물질 보다는 유기물 제거율에 높은 효과가 있었고, 최대 30.6%의 제거율 향상을 나타내었다. 막오염 저감에 있어서는 세 종류의 응집제 모두 뚜렷한 효과를 관찰할 수 있었으며, 특히 장기운전에 TA어서 PACS가 가장 효과적이었다. 역세척 효율은 철염응집제가 가장 효과적이었으며, 적정 응집제 주입량에 가까울수록 효율이 향상되는 것으로 나타났다.