Optimisation of Ultrasound Pretreatment of Microalgal Biomass for Effective Biogas Production through Anaerobic Digestion Process

The anaerobic digestion, AD, process presents a solution for sustainable waste management, greenhouse gas mitigation and energy production growing population needs requirements. Adopting biorefinery approach that utilises different feedstock may enhance support optimisation of the digestion process. Algae is promising could be used via Microalgal biomass rich in carbohydrates lipids; however, many species algae exhibit tough cell walls also difficult to digest influence or inhibit efficiency AD This study concentrated on comparison remediation two marine algal species, Tetraselmis suecica Nannochloropsis oceanica. were pre-treated with an ultrasound technique compared their methane using biochemical potential tests. For Tetraselmis, specific 0.165 LCH4/KgVS was observed; Nannochloropsis, value 0.101 observed samples treated ultrasound. BMP results from this show among micro-algae tested, found better substrate potential. Contrary increasing production, cavitation caused slight decrease values both oceanica residues. pre-treatment techniques provided comparable can recommended effective bioenergy production. However, further research required microalgae integration microalgal biorefineries circular economy.