有机磷和无机磷对铜绿微囊藻生长的影响及动力学分析

以β-甘油磷酸钠和K₂HPO₄为例,研究了以有机磷或无机磷为磷源时,铜绿微囊藻的生长过程,并应用Monod模型对结果进行了动力学分析.根据计算,以K₂HPO₄为磷源时,铜绿微囊藻最大比增长率(μ_max)为1.107 d-1,对磷的半饱和常数(Ks)为0.004 8 mg/L;以β-甘油磷酸钠为磷源时,铜绿微囊藻μ_max为0.882 d-1,Ks为0.006 5 mg/L.在一定质量浓度范围内,铜绿微囊藻的最大现存量及最大比增长率均随磷质量浓度的增加而增大;在试验条件下铜绿微囊藻达到90%μ_max时,ρ(K₂HPO₄)为0.042 mg/L,ρ(β-甘油磷酸钠)为0.059 mg/L;此外,磷形态及其质量浓度对铜绿微囊藻的指数增长时间影响较大,从而对其最大现存量造成影响. 

The Effect of Organic and Inorganic Phosphorous on the Growth of Microcystis Aerugiosa and Its Dynamic Analysis

The growth of Microcystis aerugiosa was investigated using organic phosphorous(OP,β-Glycerophosphate disodium) and inorganic phosphorous(IP,K₂HPO₄) as phosphorus sources.Meanwhile,by using Monod equation,dynamic studies were carried out based on experimental results.The results of calculating show that when the phosphorus source is IP,the maximum specific growth rate(μ_max) is 1.107 d-1 and the half-saturation constant(Ks) is (0.004 8)(mg/L;) that when the phosphorus source is OP,μ_max is 0.882 d-1 and Ks is(0.006 5)(mg/L.) The maximum extant quantity(Xmax) and μ_max increased within a range of phosphorous mass concentration.Under the test conditions,to make Microcystis aerugiosa reach its 90% μ_max,the mass concentration of IP should be up to 0.042(mg/L) or the mass concentration of OP should be up to 0.059(mg/L.) Furthermore,the mass concentration and the form of phosphorus could affect the Xmax of Microcystis aerugiosa through changing the exponential increasing time.