【摘要】：以太湖微囊藻群體為研究對象,研究低頻超聲作用下,4種超聲強(qiáng)度和不同處理時間對微囊藻群體的抑制效應(yīng),試圖得出最優(yōu)超聲參數(shù),同時探討超聲處理后的微囊藻群體對光照和溫度的響應(yīng).結(jié)果表明,當(dāng)超聲強(qiáng)度為0.0353 W/cm~3、處理時間為60 s時,藻細(xì)胞沉降量高達(dá)80%,且此時藻細(xì)胞濃度和葉綠素a濃度均保持不變,表明超聲未破碎藻細(xì)胞,細(xì)胞內(nèi)含物不會泄漏污染水質(zhì),因此作為最優(yōu)超聲參數(shù).隨后,對超聲處理后的微囊藻群體在不同光照和溫度條件下進(jìn)行恢復(fù)培養(yǎng),結(jié)果表明光照和溫度均能影響微囊藻群體的浮力恢復(fù),但光照的影響更明顯,當(dāng)光照度為2000 lx時,藻細(xì)胞在培養(yǎng)120 h后漂浮率恢復(fù)至對照組水平.超聲后的藻細(xì)胞在較低溫度(≤20℃)下漂浮率無顯著變化,而在較高溫度(25℃)下,培養(yǎng)72 h后漂浮率迅速升高,至120 h能恢復(fù)至對照組水平的80%左右.因此,野外超聲控藻應(yīng)選擇低光強(qiáng)、低溫的時段,采用間歇式多次處理,抑制微囊藻群體上浮,使其徹底沉降.
[Abstract]:The inhibitory effects of four kinds of ultrasound intensity and different treatment time on microcystis in Taihu Lake were studied, and the optimal ultrasonic parameters were obtained. At the same time, the response of microcystis to light and temperature was studied. The results showed that when the ultrasonic intensity was 0.0353 W / cm ~ (3) and the treatment time was 60 s, the sedimentation of algal cells was as high as 80%, and the concentration of algal cells and chlorophyll a remained unchanged, indicating that the contents of the cells did not leak to pollute the water quality without breaking the algal cells by ultrasound. Therefore, as the optimal ultrasonic parameters. The results showed that both light and temperature could affect the buoyancy recovery of microcystis, but the effect of light was more obvious when the light intensity was 2000 LX. After 120 hours of culture, the floating rate of algal cells returned to the level of control group. There was no significant change in the floatation rate of algal cells at lower temperature (鈮，

本文編號：2185709