Pretreatment of macroalgae for volatile fatty acid production.
In this study, a novel method was proposed for the biological pretreatment of macroalgae (Laminaria japonica, Pachymeniopsis elliptica, and Enteromorpha crinita) for production of volatile fatty acid (VFA) by anaerobic fermentation. The amount of VFA produced from 40 g/L of L. japonica increased from 8.3 g/L (control) to 15.6 g/L when it was biologically pretreated with Vibrio harveyi. The biological treatment of L. japonica with Vibrio spp. was most effective likely due to the alginate lyase activity of Vibrio spp. However, a considerable effect was also observed after biological pretreatment of P. elliptica and E. crinita, which are red and green algae, respectively. Alkaline pretreatment of 40 g/L of L. japonica with 0.5 N NaOH resulted in an increase of VFA production to 12.2 g/L. These results indicate that VFA production from macroalgae can be significantly enhanced using the proposed biological pretreatments.
Department of Chemical and Bio-Engineering, Gachon University, Seongnam, Gyeonggi-do 461-701, Republic of Korea.
Thi Nhan
TN
Pham
Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea.
Youngsoon
Y
Um
Department of Chemical and Bio-Engineering, Gachon University, Seongnam, Gyeonggi-do 461-701, Republic of Korea. Electronic address: hhyoon@gachon.ac.kr.
Hyon Hee
HH
Yoon
D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D000460:Chlorophyta / Q000378:metabolism*; D005232:Fatty Acids, Volatile / Q000096:biosynthesis*; D005285:Fermentation; D005740:Gases; D006863:Hydrogen-Ion Concentration; D007795:Laminaria / Q000378:metabolism; D000461:Rhodophyta / Q000378:metabolism*; D012624:Seaweed / Q000378:metabolism*; D012722:Sewage; D013997:Time Factors; D014733:Vibrio / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater; D018508:Water Purification / Q000379:methods
D056804:Biofuels; D005232:Fatty Acids, Volatile; D005740:Gases; D012722:Sewage; D062065:Wastewater
Anaerobic fermentation; Macroalgae; Vibrio alginolyticus; Vibrio harveyi; Volatile fatty acids