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許昌斗,尹星閏,朴勝祚 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.2
This study is an improvement effect with varying the factors, such as ultrasonic irradition time, sludge depth and ultrasonic intensity. The calculated result about the moisture content rate and the specific resistant coefficient, based on the outcome of the dewatering test by BFT, can be summarized as follows : 1. The specific resistant coefficient of the paper mill sludge was 4.34×10¹²m/㎏ at ultrasonic intensity of 0 watt/㎡ and ultrasonic irradiation time of 6 minutes. And also, the balue of a slope "a" was 0.024 and the moisture content rate of sludge was about 72% on condition that the depth o sludge was 60㎝. 2. In case that the dosing concentration of ultrasonic+a congulant was 100㎎/l, the moisture content rate of dewatered sludge was about 58%.
허창두,신남철,우성훈,박승조 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-
The aim of this study was investigated with the behavior of parathion adsorption and degradation efficiency of parathion in various samples loaded with earthworm casting. Adsorption capacity of parathion in loam soil was better than clay loam. Degradation of parathion was 70 percent in loam and clay loam soil to time but samples was loaded 5% casting, L0C5 and CLC5 had shown 90 percent degradation. We found that parathion was leachers pesticide as groundwater ubiquity score (GUS) was more than 4.0.