Chuen Yeong, Kah
(2020)
Determination Of The Effect Of Ph On
Microalagal Growth And Protein
Content In Locally Isolated
Tetraselmis Suecica And
Scenedesmus Parvus.
Project Report.
Pusat Pengajian Teknologi Industri.
(Submitted)
Abstract
Mass production of certain protein rich microalgae as single cell protein was
considered as a possibility to minimise the protein gap due to increasing of global
population. However, the protein productivity and the growth of the microalgae will
be affected by the cultivation condition during the mass production. Thus, this
project is to explore the possibility of the locally isolated microalgae as a single cell
protein source where both microalgae Tetraselmis suecica and Scenedesmus parvus
were cultivated in different initial pH cultivation medium (pH 3.00 to pH 9.00). The
growth kinetic and growth profile of the microalgae over 13 day’s cultivation period
were determined. The protein content as well as the protein productivity of the
microalgae biomass were determined using Kjeldahl method. Lastly, suitable kinetic
growth model for both microalgae under different pH medium was also determined
among Logistic model, Gompertz model and Baranyi-Roberts model. The maximum
biomass concentration and highest biomass productivity for T. suecica was obtain at
pH 5.00 with 157.842 ±4.507 mg L-1 and 9.767 ±0.003 mg L-1d-1 respectively while
maximum biomass concentration and highest biomass productivity for S. parvus was
obtain at pH 7.00 with 154.447 ± 3.030 mg L-1 and 10.132 ± 0239 mg L-1d-1
respectively. The maximum protein content and highest protein productivity of T.
suecica was obtained at pH 5.00 with 44.704 ±0.785 % and 4.366 ±0077 mg L-1d-1
while maximum protein content and highest protein productivity of S. parvus were
obtained at pH 7.00 with 36.93 ±1.039 % and 3.742 ±0.105 mg L-1d-1respectively.
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