Applied Chemistry, Vol.1, No.1, 187-190, May, 1997
포말 분리법에 의한 순환여과식 양어장의 고형물 및 영양염류 제거특성
Characteristics of Solid and Nutriests Removal in Aquacultural Recirculating Water by Foam Separation
초록
포말 분리법에 의한 양어장 순환수 중의 고형물 및 영양염류의 제거 특성을 조사하였다. 공탑 공기유속, 체류시간이 증가함에 따라 단백질, T-N, TA및 고헝물 성분들의 제거율은 증가하였으며, TVS의 제거율은 공탑 공기유속 및 체류시간(HRT)이 증가함에 따라 증가하였으나 포말층 높이가 높아짐에 따라서는 감소하였다. 포말분리장치는 양어장 순환수 중에서 발생되는 어류 성장에 유해한 성분, 특히 TA 및 TVS의 제거에 우수한 성능을 보임을 알 수 있었다.
Thin films of CdS were prepared from an solution containing Cd(Ac)2, NH4OH, NH4Ac and (NH2)2CS for solar cells. Growth rate of CdS nnu was increased with increasing temperature of reactive solution and with decreasing concentration of NH4OH. Optical transmittances were more than 60%, independent with temeprature and concentrations and was changed with thickness of CdS films. Grown films mostly showed the presence of polycrystallines with mixed cubic and hexaginal phases, but showed the hexagonal preferred phases in some growth condition. The resistivities of CdS were decreased by doping boron and critical amount of dopant was determined.