摘要
该试验旨在改进原有的水力空化耦合电解抑藻设备并初步分析其抑藻机理。通过改变空化器位置,提高了装置的抑藻速率,在水压0.33MPa,电流密度为2.13mA/cm2条件下,处理10L藻密度为3.0×106mL-1的铜绿微囊藻藻液20min,2d后抑藻率即可达到72.5%。通过TEM电镜照片的分析,发现在受到水力空化、电解的协同作用下,铜绿微囊藻细胞受到一定程度的破坏,外部细胞壁与细胞质部分剥离,细胞内气泡体积变小。沉降柱试验对比表明在藻细胞内部细胞器受损的情况下其沉降能力提高,而随后进行的低光照培养对比试验结果说明经过处理的藻细胞在无光照的条件下死亡率高于对照样。试验结果表明:采用该装置通过破坏藻细胞结构不仅直接杀伤藻细胞,而且可使其沉降到水体底部,在光照不足的条件下来提高抑藻效果。
The purpose is to improve the original hydraulic cavitation coupled with electrolysis system by changing position of the cavitation position in order to strengthen its inhibitive effect on blue green algae. The experiment conducted involves observation of injuries of M.aeruginosa cells during the treatment by use of TEM, indicating that the improved synergetic hydraulic cavitation and electrolysis not only can kill the algae cells directly, but also attain an additional inhibitive killing effect by sinking the injured ceils
出处
《环境科学与技术》
CAS
CSCD
北大核心
2008年第10期43-46,共4页
Environmental Science & Technology
关键词
水力空化
沉降
藻细胞结构
抑藻
hydraulic cavitation
Microcystis aeruginosa
sinkability
inhibition rate
