Journal
BIORESOURCE TECHNOLOGY
Volume 255, Issue -, Pages 116-122Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.01.116
Keywords
Chemo mechanical; Biohydrogen; Fermentation; Specific energy; Algal biomass
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The present study aimed to increase the disintegration potential of marine macroalgae, (Ulva reticulata) through chemo mechanical pretreatment (CMP) in an energy efficient manner. By combining surfactant with disperser, the specific energy input was considerably reduced from 437.1 kJ/kg TS to 264.9 kJ/kg TS to achieve 10.7% liquefaction. A disperser rpm (10,000), pretreatment time (30 min) and tween 80 dosage (21.6 mg/L) were considered as an optimum for effective liquefaction of algal biomass. CMP was designated as an appropriate pretreatment resulting in a higher soluble organic release 1250 mg/L, respectively. Anaerobic fermentation results revealed that the volatile fatty acid (VFA) concentration was doubled (782 mg/L) in CMP when compared to mechanical pretreatment (MP) (345 mg/L). CMP pretreated algal biomass was considered as the suitable for biohydrogen production with highest H-2 yield of about 63 mL H-2/g COD than (MP) (45 mL H-2/g COD) and control (10 mL H-2/g COD).
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