NH4NO3 simultaneously provides a readily assimilable nitrogen source (ammonia) and a reserve of nitrogen (nitrate), allowing for an increase in Arthrospira platensis biomass production while reducing the cost of the cultivation medium. In this study, a 2 plus star central composite experimental design combined with response surface methodology was employed to analyze the influence of light inte...

Current study was focused on optimising lead(II) biosorption carried out by living cells of Arthrospira platensis using Principal Component Analysis. Various experimental conditions were considered: initial metal concentration (50 and 100 mg/l), solution pH (4.0, 4.5, 5.0, 5.5) and contact time (10, 20, 30, 40, 50 and 60 min) at constant rotary speed 200 rpm. It was found that when the biomass ...

The effects of light intensity and temperature in S. platensis cultivation with potassium nitrate or urea as nitrogen source were investigated, as well as the biomass chlorophyll contents of this cyanobacteria, through the Response Surface Methodology. Experiments were performed at temperatures from 25 to 34.5ºC and light intensities from 15 to 69 µmol photons m(-2) s(-1), in mineral medium. In...

Membrane diafiltration process was developed in order to fractionate the water soluble proteins of supernatant obtained after Spirulina bead milling disruption and centrifugation. The crude extract filtered with 50 kDa, 150 300 kDa or 0.2 µm membranes. Phycocyanin purified extracts were produced filtration on membrane allowed high recovery (more than 89%) A C into retentate permeate as well sep...

A miniaturized, small-scale photobioreactor (PBR) known as EOSS2-PBR (Efficient Overproducing Screening System photobioreactor) has been developed to characterize microalgal growth under controlled conditions. As with similar systems, allows the screening of either culture conditions or species performance, but it is also specially designed provide high levels light absorption control in volume...

A sixty-days feeding trial was conducted to evaluate the inclusion effect of spirulina Arthrospira platensis meal (SM) in diet on growth and health condition juvenile Pacific white shrimp Litopenaeus vannamei. Four isonitrogenous iso-lipidic experimental diets were formulated contain 0%, 0,2%, 0,4% 0,8% SM. After 60 days, sampled total haemocyte counts measured. The performances significantly a...