Abstract
This study illustrated the participation of marine macroalgaebiomass (MAB) (Chaetomorpha antennina) in the liquefaction process for bioenergy production. The proposed work intended to investigate the role of disperser pretreatment (DP) and ozone disperser pretreatment (ODP) of MAB for energy efficient biogas generation. The disperser G-force of 1613 g, pretreatment time 30 min and ozone dosage 0.00049 g O3/g TS waspreferred as an optimum conditions for profitable and energy efficient liquefaction. On comparing DP and ODP, the MAB liquefaction and methane production potential was much higher (20.5 %, 0.20 g COD/g COD) in ODP when compared to DP (11.9 %, 0.11 g COD/g COD). Therefore, the ODP essentially improve the anaerobic biodegradability of MAB. The economic assessment showed that the ODP was found to have a higher net profit of 71 USD/ton of MAB compared to DP (4 USD/ton of MAB).
Highlights
The imminent scarcity of energy had initiated the investigation in renewable and energy efficient biofuels production using sustainable carbon sources in the form of different organic feedstocks (Kumar et al, 2018)
The disperser rod works based on the rotor-stator effect
The higher mechanical shear force, agitation, and cavitation enhances the disintegration of Macroalgae Biomass (MAB) substrates (Kavitha et al, 2016)
Summary
The imminent scarcity of energy had initiated the investigation in renewable and energy efficient biofuels production using sustainable carbon sources in the form of different organic feedstocks (Kumar et al, 2018). GRAPHICAL ABSTRACT | Ozone assisted Disperser Pretreatment (ODP) for biogas production from macroalgal biomass. Biofuel production from MAB (macroalgae biomass) is recognized as 3rd generation biofuels, to discriminate 1st and 2nd generation biofuels derived from terrestrial plants which has less sustainable yield (Allen et al, 2014). Macroalgal biomass has received more attention in biofuel production when compared with other feedstocks (Jung et al, 2011). Availability of high biopolymers promotes MAB as a best alternative substrate for biomethane production (Dinesh Kumar et al, 2018)
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