Growth of freshwater microalga, botryococcus sp. in heavy metal contaminated industrial wastewater
The aim of this study was to determine the growth and the bioremoval capacity of the green microalga, Botryococcus sp. grown in industrial wastewater contaminated with heavy metals. The freshwater green microalga, Botryococcus sp. was cultured in different concentrations of wastewater (25%, 50% and...
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| Format: | Article |
| Published: |
Penerbit UTHM
2014
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| Subjects: | |
| Online Access: | http://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/947 http://penerbit.uthm.edu.my/ojs/index.php/JST/article/view/947 http://eprints.uthm.edu.my/8232/1/dr_hazel_9.pdf |
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| Summary: | The aim of this study was to determine the growth and the bioremoval capacity of the
green microalga, Botryococcus sp. grown in industrial wastewater contaminated with
heavy metals. The freshwater green microalga, Botryococcus sp. was cultured in
different concentrations of wastewater (25%, 50% and 100%) with an initial cell
concentration of 1000 cells/ml for a period of 12 days. Bold basal medium and sterile
distilled water were used as positive and negative control, respectively. The
Botryococcus sp. grown in Bold’s basal medium showed the highest (P<0.05)
average growth rate (7.8 × 106 cells/ml) after a period of 12 days, whereas, the
lowest (P<0.05) growth was observed in 50% concentration of wastewater (4.8 × 104
cells/ml). Similar results were obtained for the specific growth rate (μ/day) with an
average of 1.93μ/day and 1.22μ/day for the positive control and the 50%
concentration respectively. Highest reduction of heavy metals was achieved for
chromium which is equivalent to 94%, followed by copper (45%), arsenic (9%) and
cadmium (2%). The results of this study suggest the potential of Botryococcus sp. as
bioremediator of wastewater contaminated with heavy metals. |
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