5. Conclusion
The present study showed that both microalgae C. pyrenoidosa
and S. abundans are highly adaptable in sewage water. The maximum
nutrient removal was observed with 10% inoculum size
and found to be as follows: Ammoniacal nitrogen – 99.4%,
98.6%; Nitrates – 78%, 81%; Phosphates – 97%, 96%; Chlorides
– 91%, 85% for C. pyrenoidosa and S. abundans respectively.
Growth in sewage appeared to be very effective for
microalgae cultivation that reflected in chlorophyll accumulation.
The maximum chlorophyll content obtained for 10%
inoculum size was 11.4 mg/l and 7.23 mg/l for C. pyrenoidosa
and S. abundans, respectively. Based on the study it can be concluded
that both C. pyrenoidosa and S. abundans with 10%
inoculum size can be used for wastewater treatment with respect
to nutrient removal.