淀山湖蓝藻碎屑的好氧降解和营养盐释放规律研究

Study on the aerobic decomposition and nutrient release of cyanobacteria detritus in Dianshan Lake

收集淀山湖的水华蓝藻,经超声波处理后,研究死亡蓝藻的好氧降解及营养盐释放规律.结果表明,蓝藻细胞有机碳的矿化速率为9.415mg/(L d),有机氮的氨化速率为0.441mg/(L d),有机磷的降解速率为0.044mg/(L d),好氧降解将会造成溶解态营养盐的大量释放,降解后硝态氮和正磷酸盐分别比初始值高4.22倍和4.20倍.

The aerobic degradation and nutrients release rule of cyanobacteria debris collecting from Dianshan Lake was studied,after ultrasonic treatment. The results showed that the cyanobacterial cell mineralization rate of organic carbon was up to 9.415mg/（L×d）, the ammonification rate of organic nitrogen up to 0.441mg/（L×d）, the degradation rate of organic phosphorus up to 0.044mg/（L×d）. Aerobic degradation will result in a massive release of dissolved nutrient, the nitrate and orthophosphate concentration was 4.22and 4.20times higher than initial value after degradation.