Chemical Composition of Spirulina platensis which Cultivated in Photobioreactors with Different Photoperiodes

Abstract

<p><em>Spirulina platensis</em> known as filamentous cyanobacteria, single-celled and spiral-shaped. It is often called blue-green microalgae. This study aimed to determine the effect of photoperiod on the characteristic of <em>S. platensis</em> which were cultivated in a controlled photobioreactor (FK) and uncontrolled photobioreactor (FTK). The observed characteristics include the growth curves, dried weight of biomass, carbohydrates content, protein, fat and bioactive compounds. The research used Completely Randomized Design (CRD) with two replications. <em>S. platensis</em> was cultured in 10 L volume using combination of urea, organic fertilizer RI1 and Plant catalyst (URC medium) at 24:0, 16:8, 12:12 and 6:18 (light hours:dark hours) photoperiods. The results showed the controlled photobioreactor (FK) with 24:0 photoperiods had Optical Density (0.882), dried biomass (0.31 g/L) and carbohydrate (25.85%) highest than those of other treatments. Uncontrolled photobioreactor (FTK) with photoperiods 12:12 and 16:8 had the higher protein content (58,44%) than of other treatments. The highest total fat (6.60%) occurred in photoperiod 6:18. The results of bioactive compounds based on phytochemical analysis for the whole treatment positively contained flavonoids, phenols, steroids and saponins.</p>

Off-odour Identification from Volatile Organic Compounds (VOCs) of Spirulina

“…Maceration is filtered and evaporated using a rotary evaporator at 50℃ until a dry paste is formed. Phytochemical screening for the presence of the following; alkaloids, flavonoid, saponin, triterpenoid, steroid and tannins were carried out following methods previously described [11].…”

“…Ethanolic extract of Spirulina platensis positively contains of alkaloid, flavonoid, tannin, triterpenoid, and saponin as bioactive compound (Table 1.). Bioreactor cultivation of spirulina platensis has phytochemical compound was flavonoids, phenols, steroids and saponins [11]. Different cultivation method and environmental factor has a more varied of chemical component [10].…”

“…-(β ionone). The odour descriptor of each off-odour VOCs is floral, balsamic, powdery, waxy [11]; rancid, sweaty [13]; and woody [22] alkali [15], and fish-like [14] (Tabel 2). The β-ionone is one of off-odour compound of spirulina that has responsible in aroma acceptance [9].…”

“…The environmental and taxonomical factors determine the composition of chemical content and VOC in microalgae biomass [10]. The environmental factor of cultivation such as, temperature, salinity, illumination, pH, nutrient [10] and cultivation methods [11].…”

Antibacterial activity of ethanolic Spirulina platensis extract-water soluble chitosan nanoparticles

“…Spirulina platensis is a microalga containing nutrients, pigments, and a bioactive compound with several biological activities, such as antioxidant, antitumor, anticancer, antifungal, antiviral, and antibacterial [1]. The bioactive components in Spirulina include phenolic compounds, triterpenoids, steroids, flavonoids, and saponins [2]. The antibacterial activity shown by Spirulina sp.…”