Project news
Selected algae spices
During the project 5 microalgae strains were chosen to test their growth and productivity in laboratory experiments.
The chosen strains are: Chlorella sorokiniana,Chlorella vulgaris,Scenedesmus quadricauda,Spirulina platensisand Synechocystissp. PCC6803. Anabaenasp. PCC7120 was also tested but it did not grow in the different tested culture conditions and was disregarded in later experiments
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Original environment |
Optimal temperature (°C) |
Optimal light intensity (µmol m-1 s-1) |
Optimal pH |
Recommended growth media |
Speciality |
|
Chlorella vulgaris |
fresh water |
20-28 |
50-300 |
6-8 |
BBM |
Good biomass yield, presence of phytohormone-like molecules |
|
Chlorella sorokiniana |
fresh water |
20-28 |
50-300 |
6-8 |
BBM |
Good biomass yield, presence of phytohormone-like molecules |
|
Scenedesmus quadricauda |
fresh water |
20-28 |
50-300 |
6-8 |
BBM |
Good biomass yield, presence of phytohormone-like molecules |
|
Spirulina platensis |
fresh water |
28-35 |
150-200 |
9-10 |
SOT |
High microelement content, high temperature tolerance, high alkalinity |
|
Anabaena sp. PCC 7120 |
fresh water |
25-30 |
50-200 |
7-8 |
BG11 |
Ability to fix N2 |
|
Synechocystissp. PCC 6803 |
fresh water |
25-30 |
50-200 |
7-8 |
BG11 |
Well documented cyanobacterial modell organism |
1. Table General characteristics and short description of the chosen algae strains.
During the open-pond alga production only Chlorellasp. and Scenedesmussp. were able to adapt to the sometimes extreme conditions occurred in the greenhouse. Other alga strains however appeared and were able to grow in the alga suspensions:
Coelastrellasp.
This microalga is able to withstand temperatures over 50°C for more than 8 h and produces pigments including astaxanthin, lutein, canthaxanthin and β-carotene (ordered by polarity of these compounds) after the cells are stressed for a period of time.
Acutodesmus obliquus
These microalgae are cosmopolitan genus with small globular cells. It includes strains with high temperature tolerance as some strains can grow between 15-40 °C. They are used in open pond systems because of their high autotrophic growth rate.
Actinastrumsp.
Found in the plankton of nutrient-rich lakes and ponds. Can be abundant in sewage ponds, particularly during summer. It is a very common contaminating alga in open ponds.
2018. April 19.