상토 및 육묘 포트의 개발을 위한 제지 슬러지의 이용 (제 2 보)- 제지슬러지 및 첨가제의 최적 혼합을 통한 인공 상토 제조 -

Abstract

In order to supplement insufficient nutrients of paper sludges, additional materials such as saw dust and rice husk were added during preparation of bed soils. Rice husk was more finely ground, compared to saw dust. The fine particles of the rice husk prevented their flow in a barrel of the expander. The mixed additives with paper sludges could be used to control the quantity of required nutrients for raising plants. That is, except for potassium and manganese, most of nutrients were decreased with adding the additives to paper sludge. The acidity of the paper sludges mixed with the saw dust or the rice husk was a little decreased with the increased amount of the additives. Differently from the bulk density of the paper sludges, the moisture content and the water absorption rate of the paper sludges were incremented with increasing the additives.