수화현상의 대표적 원인 생물인 남조류의 M. aeruginosa와 대조구로서 녹조류인 C. zofingiensis를 인공 배양하여 분말세라믹 투여에 따른 선택적 조류 제거 가능성에 대해 실험하였다. 0.05 mm의 분말세라믹을 투여에 따른 M. aeruginosa 및 C. zofingiensis의 침전효율은 각각 82와 63%였으며, 입자크기 0.1과 1 mm의 경우에서 는 M. aeruginosa는 각각 69와 34%, C. zofingiensis는

2001, 2003년의 7월부터 10월까지 대청호에 위치한 댐 지역에서 식물플랑크톤 군집, 환경요인 및 강우량을 조사하였다. 조사 기간동안의 월평균 강우량은 2001, 2003년 각각 91.3, 265.3mm로 조사되었다. 최대 Chl. a의 농도는 2001, 2003년 각각 45.4, 131.5 ㎍ L/sup -1/로 조사되었다. 남조류 세포수는 2003년 최대 49,000 cells mL/sup -1/로 조사되었고, 2001년은 최대 200,000

This study was investigate to evaluate the phosphate uptake rate of green algae in relation to diurnal rhythm and algae control method. The phosphate uptake rates of Chlorella vulgaris and Ankistrodesmus convolutus increased in light period and decreased in dark period. On the contrary, those of Chlamydomonas sp. showed a peak in the late dark period. The differences among species in phosphate uptake in relation to diurnal rhythm were due to the severe competition among species and seemed to alleviate the competition for nutrient supplies. The compound of CellCaSi, Ca and Fe showed the effective removal of the phosphorus. The extracts from rice and barley straw exhibited a significant effect on the growth inhibition of Microcystis aeruginosa.

Laboratory experiments were conducted to investigate the effect of ceramic-treated water on the inhibition of algal growth. The growth of Scenedesmus quadricauda and Chlorella vulgaris was enhanced by the ceramic- treated water in Allen medium containing high concentration of nutrients, but inhibited in natural water containing low concentration of nutrients. The growth of Oscillatoria tenuis and Microcystis aeruginosa was inhibited in both Allen medium and natural water. When comparing the effects of ceramic-treated water 1 (NC1) and 2 (NC2), the growth of O. tenuis and M. aeruginosa was somewhat enhanced by NC1, whereas inhibited by NC2. Therefore, it is suggested that NC2 can be more effective than NC1 in controlling the algal growth.