Production of biodiesel from algal biomass collected from Solani River using Ultrasonic Technique

Abstract

Abstract-The present paper presents the production of bio-diesel from algal biomass collected from Solani aqua duct in Roorkee. The identification of algal sample shows the presence of Hydrodictyon recticulatum (L) Lagerheium with few vegetative filaments of ulotrichalean strain in it. The algal biomass contains about 14.47 wt % of lipid. The algal biomass was collected from Solani aqua duct and washed several times with water and dried on sunlight for three days then the algal-oil was extracted from pulverized biomass (100-125 µm particles).The most suitable conditions for the extraction of bio-oil using ultrasonic technique were found to be solvent to biomass ratio of 6, extraction time of 50 min. and amplitude percentage of 70% at 0.6 cycle/sec. Under these conditions around 51% of oil/lipid in the algal cells was extracted. The produced bio-oil was upgraded to biodiesel by transesterification using CH3ONa as catalyst. The catalyst shows ~ 80 % conversion of bio-oil to bio diesel. A comparison of ultrasonic extraction and Soxhlet extraction showed that ultrasonic extraction provides higher extraction efficiency with shorter extraction time.

Keywords

• Bio-oil; Algae; Algal biomass; Transesterification; Ultrasonic extraction; Catalyst; Biodiesel.

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