KEPADATAN DAN LAJU PERTUMBUHAN SPESIFIK Nannochloropsis sp. PADA KULTIVASI HETEROTROPIK MENGGUNAKAN MEDIA HIDROLISAT SINGKONG
ABSTRACT: Growth of
Nannochloropsis sp. was observed in laboratory cultivation condition with
enrichment of cassava hydrolysate into culture medium as follow : 25 ml microalgae
strain, 75 ml seawater, without cassava hydrolysate (A); 25 ml microalgae
strain, 25 ml cassava hydrolysate, 50 ml seawater (B), 25 ml microalgae strain,
50 ml cassava hydrolysate, 25 ml seawater (C). Cultivation condition was fixed
as follow temperature 29°C, seawater pH 8, and salinity 30 ‰. Microalgae
cultivation was performed at microalgae laboratory of Surfactant and Bioenergy
Research Center using 100 ml Erlenmeyer covered by black plastic to prevent the
influence of light. The specific growth rate of Nannochloropsis sp. was
observed in 7 days for different cultivation medium composition. The highest
density of microalgae was in the 4th days with 50ml cassava hydrolysate’s
feeding (C treatment) about 172.661 cell/mL. The highest specific growth rate
for Nannochloropsis sp. cultivation was observed in the 6th days without
cassava hydrolysate’s feeding. Result of statistical analysis showed that
different cassava hydrolysate’s feeding treatments (ml) in heterotrophically microalgae
cultivation influenced the density of microalgae (cell/mL) but not influenced
the specific growth rate of microalgae (per day).
Keywords: Cassava hydrolysate,
Density, Heterotrophic cultivation, Spesific growth rate, Nannochloropsis sp.
Penulis: Mujizat Kawaroe, Tri
Prartono dan Ganjar Saefurahman
Kode Jurnal: jpperikanandd150135
