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Using of Urban Secondary Wastewater as an Alternative Medium for the Culture of Tetraselmis suecica
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Alireza Afshari   , Maziar Yahyavi , Mirmasoud Sajjadi |
| , ali_afshari32@yahoo.com |
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Abstract: (7749 Views) |
| In this research, the growth capability of microalgae (Tetraselmis suecica) in urban secondary
wastewater as well as the determination of the best density of wastewater for the growth of these
microalga have been studied. Moreover, the capability of this microalga for the treatment of wastewater
and removal of nitrogen and phosphorus has been evaluated. To study the growth rate, Tetraselmis
suecica was cultured in stable laboratory conditions with similar densities (1×106 cell × ml-1) in different
volumes of urban secondary waste water (20, 40,60, 80 and 100%) within a period of 21 days. It was also
cultured at three initial densities (5×105, 1×106 and 2×106 as low, moderate and high, respectively) in 250
ml of wastewater for 14 days in order to evaluate its purification effects. Results indicated that cell number
increased in all treatments but the growth ratio was higher in 40 and 60 percent and was comparable to the
control treatment (P<0.05). Also, this species is able to remove 80%, 71.8% and 56.3% of nitrate,
phosphate and nitrite from wastewater, respectively. So, it is possible to use urban secondary wastewater
for T. suecica culturing as an alternative medium. Also, the ability of this species for N & P removing
from wastewater shows its ability for wastewater treatment, so that the higher densities give more
satisfactory results in the removal of nutrients. |
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| Keywords: Tetraselmis suecica, Density cell, Nitrogen and phosphorus removal, Urban wastewater. |
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Full-Text [PDF 139 kb]
(1971 Downloads)
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Type of Study: Research/ Original/ Regular Article |
Received: 2014/10/19 | Revised: 2015/02/28 | Accepted: 2014/10/19 | ePublished: 2014/10/19
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