斜生栅藻对低浓度无机磷去除和生长情况的研究

研究分析了低磷浓度培养条件对斜生栅藻生长情况的影响,以及斜生栅藻对磷的去除效果.结果表明,斜生栅藻在初始细胞浓度为1×105个/mL时,可以在22h内将初始浓度0.02～0.10mg/L的磷全部去除.在初始磷浓度0.02～0.10mg/L范围内,随磷浓度的增加藻体的生长速度增加,且最大生物量也明显增大.研究发现磷浓度对斜生栅藻的形态有重要影响,在外源磷充足的条件下,斜生栅藻多为四聚体,但随着磷浓度的逐渐下降,藻细胞从四聚体,分离为二聚体,最后以单聚体为主要存在形式.

Effect of Low Phosphorus Concentration on the Growth of Scenedesmus obliquus and Phosphorus Removal

Effects of phosphorus of low concentrations on the growth and the phosphorus removal efficiency of Scenedesmus obliquus were investigated in this study. Results showed that Scenedesmus obliquus achieved a phosphorus removal efficiency of 100% within 22 h when the initial algal cell concentration was 1×10⁵/mL and the initial phosphorus concentration was 0.02-0.10 mg/L. With the initial phosphorus concentration increased from 0.02 mg/L to 0.10 mg/L, both growth velocity of Scenedesmus obliquus and maximum biomass increased obviously. Research found that phosphorus concentration had a significant influence on cell morphology of algal. In the external phosphorus sufficient conditions, most of algae cell present as four cells gather round form, then transformed into two cells side by side form in the absence of external phosphorus in culture medium, Finally in single as the main form of existence.