갈대사상 (砂床) 여과법을 이용한 축산폐수정화 - Ⅰ. 처리일수 및 계절별 변화 - = Originals : Purification of Animal Wastewater Using a Reed - Sand - Filter System - Ⅰ. Retention Period and Seasonal Variation -

다국어 초록 (Multilingual Abstract)

A reed-sand-filter system was used to purify swine wastewater economically. Reeds (Phragmites communis Trin) were planted on the sand / gravel bed of a 20/30㎝ layer depth. After the input of waste-water up to a depth of l0㎝, the effluent was monitored for pollutants on the 1st, 3rd, 5th and 7th day thereafter. As swine wastewater stayed longer, the pollutants in the effluent such as T-N, PO₄^(3-), COD and BOD were removed more effectively. The sand-filter system with reeds showed a superior removal efficiency to that without reeds. Especially in summer, the former showed greater purification rates than the latter, being 30% greater in T-N, 37% in PO₄^(3-), 42% in COD and 30% in suspended solids. The seasonal purification efficiency was in the decreasing order of July, October and April. Reeds took up 40.1g N, 10.8g P₂O_5, 38.9g K₂O, 2.8g CaO, 2.1g MgO per square meter of the above surface area.