Evaluation of different modes of operation for the production of<i>Spirulina</i>sp.

Moreira, Juliana Botelho; Costa, Jorge Alberto Vieira; Morais, Michele Greque de

doi:10.1002/jctb.4729

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Semi-continuous cultures with shorter growth cycles tend to produce higher concentrations of biomass and productivity, since the higher the renewal rate, the lower the biomass concentration and the greater the availability of light (MOREIRA et al, 2016). This phenomenon was also observed in our study because when the renewal rate was high, the cell concentrations obtained were lower.…”

Section: Resultssupporting

confidence: 82%

Effects of culture medium recycling in the chemical composition of Spirulina platensis biomass cultivated in semi-continuous mode

Gonçalves

Nazari

Magro

et al. 2022

CeN

View full text Add to dashboard Cite

Commercial microalgae cultivations use the semi-continuous mode, but there are no reports of using this cultivation mode to produce carbohydrate-rich biomass. It was evaluated the biomass productivity and intracellular carbohydrates by Spirulina platensis in semi-continuous cultivation. Besides, the reuse of the culture media after the blend was accomplished in order to obtain nutrient-depleted cultures. In the first stage (Step 1), performed in closed Erlenmeyer’s flasks, it was verified that the blend concentration and renewal rate did not influence the intracellular concentration of carbohydrates. However, the interaction of variables influenced cell concentration and carbohydrates yields, being the best results obtained with blend concentration and renewal rate of 0.5 g/L and 60%, respectively. In Step 2, realized in 10 L open mini raceways, the cultures remained viable up to 3 cycles in semi-continuous mode, obtaining mean carbohydrate contents of 41.7% (w/w) and mean carbohydrate yield of 69.3 mg/L d using the media Zarrouk 30% and 70% renewal rate. These values were higher than those observed in experiments in closed bioreactors. Therefore, it was demonstrated that semi-continuous cultivation is viable to obtain biomass for bioethanol production, which represents a possibility of reusing nutrients from the culture medium itself for this purpose.

show abstract

Section: Resultssupporting

confidence: 82%

Effects of culture medium recycling in the chemical composition of Spirulina platensis biomass cultivated in semi-continuous mode

Gonçalves

Nazari

Magro

et al. 2022

CeN

View full text Add to dashboard Cite

show abstract

“…Our results are similar compared to a continuous cultivation system that used 90% of POME and resulted in 65 mg L −1 day −1 biomass productivity (Suharyanto et al 2014). By employing the semi-continuous system, inhibitory factors such as selfshading and excess secondary products secreted by the cells could be avoided, thereby resulting in higher biomass productivity (Radmann et al 2007;Moreira et al 2016). By using seawater for cultivation, a dual benefit was achieved: the salinity could be increased at the first stage and the demand of freshwater or drinking water could be lowered, overall reducing the cost of cultivation.…”

Section: Discussionmentioning

confidence: 99%

“…Nutritional and environmental factors such as salinity, irradiance, nitrogen availability, and cultivation mode (batch, semi-continuous, or continuous) regulate pigment productivity (Bezerra et al 2011;Liu et al 2016;Ho et al 2018). The biomass (expressed as dry weight) productivity of A. platensis could be enhanced by employing semi-continuous batch cultivation to prevent nutrient limitation and self-shading (Radmann et al 2007;Moreira et al 2016). With respect to wastewater utilization, Chaiklahan et al (2010) reported that cultivation of A. platensis on pig wastewater supplemented with bicarbonate and urea by employing a semi-continuous cultivation mode could press the cost of commercial medium up to 4.4 times compared to modified Zarrouk medium.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of C-phycocyanin productivity by Arthrospira platensis when growing on palm oil mill effluent in a two-stage semi-continuous cultivation mode

et al. 2019

View full text Add to dashboard Cite

Palm oil mill effluent (POME) is well known as agricultural wastewater that has a high potential as a medium for microalgal growth due to its high macro-and micronutrient content. The cyanobacterium Arthrospira platensis is considered as a species with a high C-phycocyanin (C-PC) content which is important for fine chemical and pharmaceutical applications. However, cultivation of A. platensis on POME to produce economically feasible amounts of C-PC has not been well explored. For this, environmental, nutritional, and cultivation modes (batch, semi-continuous) were varied to optimize C-PC productivity when cultivated at various POME concentrations. Arthrospira platensis was found to grow well on POME. Highest biomass and C-PC concentrations were found on 30-100% POME. Central composite rotatable design (CCRD) response surface methodology demonstrated that C-PC productivity was influenced by urea addition at the optimum salinity. The highest C-PC productivity was found on 100% POME during semi-continuous cultivation, while the addition of phosphorus and urea did not significantly improve C-PC productivity. By applying semi-continuous cultivation with 50% POME at the first stage and 100% POME at the second stage, a similarly high C-PC productivity (4.08 ± 1.3 mg L −1 day −1) was achieved as compared with (artificial) Zarrouk medium during batch cultivation. We conclude that, when using a two-stage semi-continuous cultivation process, A. platensis can produce economically feasible amounts of C-PC when cultivated on 100% POME.

show abstract