Abstract
This study on the effect of different concentrations of germanium dioxide (GeO2) on the specific growth rate (SGR), pigment contents, protein content and amino acid composition ofSpirulina platensis showed that Ge was not the essential element of this alga; that GeO2 could speed up growth and raise protein content ofS. platensis, and could possibly influence the photosynthesis system. The concentration range of GeO2 beneficial to growth ofS. platensis is from 5–100mg/l. GeO2 is proposed to be utilized to remove contamination byChlorella spp. usually occurring in the cultivation ofSpirulina.
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