Dispersed ozone flotation of Chlorella vulgaris

Cell disruption for microalgae biorefineries

“…There are several studies on cell disruption of microalgae with these agents (Pavlić et al, 2005;Hung and Liu, 2006;Miao and Tao, 2009;Cheng et al, 2010;Ebenezer et al, 2012;Ulloa et al, 2012;Glembin et al, 2013;Huang and Kim, 2013), however, the product quality is highly affected by either oxidation (Saby et al, 1997;Phe et al, 2005;Virto et al, 2005) or disruption agent contamination. Some emerging technologies related to these chemicals, such as pressure-assisted ozonation (PAO) or advanced oxidation processes (AOP) and peroxone treatment, exist (Nguyen et al, 2013;Huang et al, 2014), however, they are not discussed in detail in this review because they are not considered as mild for use in the future biorefinery because of their effect on product quality.…”

Dual role of microalgae: Phycoremediation of domestic wastewater and biomass production for sustainable biofuels production

“…The mechanism of action is interaction with the negatively charged hydrophilic surfaces of algal cells. It is to be noted that the trial was carried out with washed cells [92]. Ozonation-dispersed flotation of cells grown in open pond culture may prove challenging due to contamination.…”

“…Ozonation-dispersed flotation of cells grown in open pond culture may prove challenging due to contamination. Lipid content of C. vulgaris, harvested by ozonation-dispersed flotation should an increase from 31% to 55% in the flotation stage according to Cheng et al [92]. An additional benefit of the use of ozone is its ability to cause cell lysis.…”

“…Ozonation-dispersed floatation and floatation employing a method of creating charged bubbles [92,93]. The mechanism of action is interaction with the negatively charged hydrophilic surfaces of algal cells.…”

Evaluation of Cell Disruption of Chlorella Vulgaris by Pressure-Assisted Ozonation and Ultrasonication

“…Ozone was previously reported to be able to lyse microalgae, liberate biopolymers such as proteins, cleave aromatic rings and decrease the molecular weights of natural organic compounds [34]. Different cell components have different degrees of susceptibility to ozonation, they might be mineralized into CO 2 and H 2 O; be partly oxidized, like lipids [19]; extensively degraded, such as cellulose; and others have high tolerance to ozonation, like oxalic acid [35].…”