Novel strategy for microalgae cell disruption and wet lipid extraction by employing electro-Fenton process with sacrificial steel anode

Efficient algal lipid extraction via a green bio-electro-Fenton process and its conversion into biofuel and bioelectricity with concurrent wastewater treatment in a photosynthetic microbial fuel cell

“…However, the amount of lipid yield was drastically reduced when the contact time was augmented beyond 12 h. This could be probably due to the oxidation of lipid molecules into lipid peroxide resulting from the prolonged attack of ROS. 14…”

“…However, the amount of lipid yield was drastically reduced when the contact time was augmented beyond 12 h. This could be probably due to the oxidation of lipid molecules into lipid peroxide resulting from the prolonged attack of ROS. 14 Furthermore, the efficiency of lipid extractability was also estimated to gauge the scalability of BEF-derived cell lysis process for practical implementation. A maximum of 95%, 91%, and 75% lipid extraction efficiency (based upon total lipid content) was achieved via Ni-Pd/C, CoFe-AC, and AC-Feassisted cell disruption, respectively, whereas only 60% lipid extraction efficiency was attained from the non-disruptive cell.…”

“…The typical GCV of microalgal biodiesel has been reported to be ∼41 MJ kg −1 , and all derived GCVs of the algal lipid extracted after BEF treatment met this EN 14214 standard and were found to be similar to values reported by Sandani et al (2022). 14 The SV of an oil signifies the quantity of KOH required to neutralise the fatty acids. In line with this, biodiesel with FAMEs that have a lower average chain length results in a higher SV.…”

“…This ensures perennial production of transient • OH in the cathodic chamber of a bio-electro-Fenton (BEF) system leading to the oxidation of target compounds. Sandani et al (2022) demonstrated that the electro-Fenton reaction is highly effective in enhancing the lipid yield (highest 19.99 ± 1.33% w/w) from wet microalgal biomass in comparison to other conventional methods. 14 Moreover, the comprehensive reduction of major biodiesel impurities such as chlorophylls through the reaction with ROS is an additional advantage of electro-Fenton reaction-based cell lysis.…”

“…Sandani et al (2022) demonstrated that the electro-Fenton reaction is highly effective in enhancing the lipid yield (highest 19.99 ± 1.33% w/w) from wet microalgal biomass in comparison to other conventional methods. 14 Moreover, the comprehensive reduction of major biodiesel impurities such as chlorophylls through the reaction with ROS is an additional advantage of electro-Fenton reaction-based cell lysis. Additionally, implementation of the electro-Fenton treatment has been proven to have positive effects on the lipid profile for the production of high-quality biodiesel, including a reduction in polyunsaturated fatty acids (PUFA) and an increase in saturated fatty acids (SFA) and monounsaturated fatty acids (MUFA).…”