龙须菜处理海水养殖废水的初步研究

Studies on treating culture effluent with Gracilaria sjoestedtii

在实验室培养条件下，分别采用添加不同浓度的无机氮、磷营养盐培养液和直接利用养鱼废水培养龙须菜，研究高浓度氮、磷营养盐条件下龙须菜的生长情况。结果表明，在溶解无机氮浓度10～75μmol／L和溶解无机磷浓度1～15μmol／L范围内，龙须菜的生长状况良好；当溶解无机氮浓度超过100μmol／L或溶解无机磷浓度超过20μmol／L时，龙须菜的生长受到抑制。养殖废水培养龙须菜的实验结果表明，龙须菜在工厂化养殖废水可以维持较好的生长状况。龙须菜可用作大规模养殖废水的净化材料。

Laboratory studies were carried out on the growth of Gracilaria sjoestedtii at high concentrations of dissolved inorganic nitrogen （DIN） and phosphorus （DIP）, culture media including seawater with added nitrogen, seawater with added phosphorus, and effluent from fish culture. The results showed that Gracilaria sjoestedtii could grow favorably at the concentration of 10～75 μmol/L DIN or 1～15 μmol/L DIP, but the growth of Gracilaria sjoestedtii would be inhibited when DIN concentrations were higher than 100 μmol/L or DIP concentrations were higher than 20 μmol/L. In addition, Gracilaria sjoestedtii could be kept growing very well in the effluent from industry culture. So Gracilaria sjoestedtii might be used as purification stuff in treating effluent from large scale culture.