Different techniques of cell disruption were applied prior to lipid extraction with solvent to enhance lipid yield.
To assess the cell disruption viability, treatments such as: microwave, ultrasonic, water bath, blender, laser and hydraulic pressing were investigated.
Aqueous phase reforming (APR) of powdered Chlorella vulgaris biomass was done at the University of Zaragoza, Spain to produce hydrogen with or without Ni catalyst with two pressure 30 or 35 bars at 227 o C.
The maximum H2 yield was 0.427 x 10-3 and 0.542 x 10-3 moles of H2 per 3 g of dry algal biomass, with Ni as catalyst at both pressure conditions.
The bio-oil content yield was found higher at 350 o C with 30 as compared to 60 min holding times and the GC-MS analysis showed the presence of fatty acids (C14-C18).
The aqueous phase contained TOC, TN and TP, which are useful nutrients for microalgae cultivation.
The microwave treatment was found the most energy efficient method with a higher percentage of cell disruption as compared the other treatments.
The microwave treatment, was chosen to enhance the lipid extraction with an organic solvent extraction from dry powdered and wet algal paste.
Microalgae can efficiently remove nitrogen and phosphorus from wastewaters.
Apart from enhancing wastewater treatment efficiency, the microalgae-based treatment systems were developed to promote microalgal growth as the produced microalgal biomass can be used in the production of e.g. Various kinds of wastewaters are produced in large quantities due to urbanization, industrialization and population growth.