Enhancement of nutrient recovery from microalgae in hydrothermal liquefaction using activated carbon

摘要: Abstract For large-scale biofuel production from microalgae, the following outcomes are needed to reduce environmental impact and cost 1) extraction of a large amount lipid (bio-oil), 2) recovery almost all nutrients their reuse for cultivation, 3) effective utilization solid residue (char). We investigated possibility using activated carbon enhance bio-oil in hydrothermal liquefaction (HTL). Microalga Fistulifera solaris was reacted at 573 K 10 MPa 0–60 min with or without commercial (0.5–5.0 wt.% microalgae) an autoclave reactor. Results show 0.5 wt.% can substantially promote total nitrogen aqueous phase, probably because catalytic effect on decarboxylation reactions produce amines. Larger (> 1.0 wt.%) decreasd due adsorption. A kinetic study phase showed apparent reaction order 3 rates were 1.1 × 10 − 7  s − 1 5.6 × 10 − 8 carbon, respectively. has insignificant influence phosphorus recovery.