Selektivní metoda pro odstranění sinic: zkušenosti s hydrodynamickou kavitací

Selective method for cyanobacterial bloom removal: hydraulic jet cavitation experience

článek v časopise ve Web of Science, Jimp

en

The aim of this study was to investigate the suitability of hydraulic jet cavitation as a method for cyanobacterial water-bloom management. Effects of cavitation were studied on laboratory culture of the cyanobacterium Microcystis aeruginosa, on a culture of a green alga Chlorella kessleri (as a non-target species) as well as on a real cyanobacterial biomass with Microcystis sp. as a dominant species. Our results suggested that the cavitation treatment of cyanobacteria is capable of causing the disintegration of their gas vesicles. Using this treatment, up to 99 % removal efficiency of cyanobacteria was achieved. Moreover, no effect on cyanobacterial membrane integrity or metabolic activity was detected by flow cytometry; thus, hydraulic cavitation seems to be harmless from the viewpoint of possible release of cyanotoxins into the water column. The green algae (here C. kessleri) were not affected negatively by the cavitation, and thus, they may still act as the natural nutrient competitors of cyanobacteria in lakes, ponds or reservoirs treated by cavitation.

Cílem výzkumu bylo stanovit vhodnost hydrodynamické kavitace jako metody pro potlačení sinic. Vliv kavitace byl studován na laboratorním kmenu sinic Microcystis aeruginosa a na zelených řasách Chlorella kessleri (necílový organismus) a na skutečných sinicích Microcystis sp. jako dominantním druhu. Výsledky výzkumu ukazují, že kavitace je schopna dezintegrovat plynové měchýřky sinic a byla dosažena téměř 99% účinnost odstranění sinic. Kavitace přitom nezpůsobila poškození membrány a metabolické aktivity sinic. Z tohoto pohledu kavitace nezpůsobuje únik cyanotoxinů do vody. Také nebyly poškozeny buňky zelených řas, které jsou přirozenými soupeři sinic ve vodním prostředí.

The aim of this study was to investigate the suitability of hydraulic jet cavitation as a method for cyanobacterial water-bloom management. Effects of cavitation were studied on laboratory culture of the cyanobacterium Microcystis aeruginosa, on a culture of a green alga Chlorella kessleri (as a non-target species) as well as on a real cyanobacterial biomass with Microcystis sp. as a dominant species. Our results suggested that the cavitation treatment of cyanobacteria is capable of causing the disintegration of their gas vesicles. Using this treatment, up to 99 % removal efficiency of cyanobacteria was achieved. Moreover, no effect on cyanobacterial membrane integrity or metabolic activity was detected by flow cytometry; thus, hydraulic cavitation seems to be harmless from the viewpoint of possible release of cyanotoxins into the water column. The green algae (here C. kessleri) were not affected negatively by the cavitation, and thus, they may still act as the natural nutrient competitors of cyanobacteria in lakes, ponds or reservoirs treated by cavitation.

esterázová aktivita, membránová integrita, analýza biologicky aktivních látek, ultrastruktura, flowcytometrie

esterase activity,membrane integrity,bioassay,ultrastructure, flow cytometry

2014

01.04.2014

Springer Science+Business Media Dordrecht

Německo

0967-6120

22

2

509–521

13