Removal of Nitrogen (NH3/NH4 +) from Wastewater by Chlorella vulgaris

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Abstract:

Chlorella vulgaris is known as one of the fastest growing microalgae, and is used in this study for the removal of residual ammonia (NH3)/ammonium ion (NH4 +) present in the wastewater effluent collected from a local wastewater treatment plant, Mill Creek plant in Cincinnati, OH. The wastewater effluent contained 8.05 ± 0.16 mg/L of nitrogen concentration in the form of ammonia/ammonium ion, 50.18 ± 0.82 mg/L of total inorganic carbon concentration, and 1.84 ± 0.10 mg/L of orthophosphate concentration at pH 7.34 ± 0.05. This study demonstrates that Chlorella vulgaris has the capability to diminish nitrogen concentration in a form of ammonia/ ammonium ion during its growth while also consuming total inorganic carbon concentration. The Monod equation is used to describe its kinetics for growth and stationary phases using nitrogen as a limiting substrate.

Keywords: Chlorella vulgaris; Growth kinetics; Nitrogen removal; Wastewater effluent

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802867324

Publication date: January 1, 2011

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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