Evaluation of a thermo-tolerant acidophilic alga, Galdieria sulphuraria, for nutrient removal from urban wastewaters

T. Selvaratnam, A. K. Pegallapati, F. Montelya, G. Rodriguez, N. Nirmalakhandan, W. Van Voorhies, Peter Lammers

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Nutrient removal from primary wastewater effluent was tested using Galdieria sulphuraria, an acidophilic and moderately thermophilic alga. Biomass yield recorded in this study (27.42g biomass per g nitrogen removed) is higher than the average reported in the literature (25.75gg-1) while, the theoretical yield estimated from the empirical molecular formula of algal biomass is 15.8gg-1. Seven-day removal efficiencies were 88.3% for ammoniacal-nitrogen and 95.5% for phosphates; corresponding removal rates were 4.85 and 1.21mgL-1d-1. Although these rates are lower than the average literature values for other strains (6.36 and 1.34mgL-1d-1, respectively), potential advantages of G. sulphuraria for accomplishing energy-positive nutrient removal are highlighted. Feasibility of growing G. sulphuraria outdoors at densities higher than in high-rate oxidation ponds is also demonstrated.

Original languageEnglish (US)
Pages (from-to)395-399
Number of pages5
JournalBioresource Technology
Volume156
DOIs
StatePublished - 2014
Externally publishedYes

Fingerprint

Algae
Waste Water
Biomass
Nutrients
Wastewater
alga
Food
biomass
Nitrogen
nitrogen
Ponds
pond
Phosphates
phosphate
effluent
wastewater
oxidation
Effluents
Oxidation
energy

Keywords

  • Algal wastewater treatment
  • Biomass yield
  • Galdieria sulphuraria
  • Nutrient removal

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal
  • Medicine(all)

Cite this

Evaluation of a thermo-tolerant acidophilic alga, Galdieria sulphuraria, for nutrient removal from urban wastewaters. / Selvaratnam, T.; Pegallapati, A. K.; Montelya, F.; Rodriguez, G.; Nirmalakhandan, N.; Van Voorhies, W.; Lammers, Peter.

In: Bioresource Technology, Vol. 156, 2014, p. 395-399.

Research output: Contribution to journalArticle

Selvaratnam, T. ; Pegallapati, A. K. ; Montelya, F. ; Rodriguez, G. ; Nirmalakhandan, N. ; Van Voorhies, W. ; Lammers, Peter. / Evaluation of a thermo-tolerant acidophilic alga, Galdieria sulphuraria, for nutrient removal from urban wastewaters. In: Bioresource Technology. 2014 ; Vol. 156. pp. 395-399.
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AU - Rodriguez, G.

AU - Nirmalakhandan, N.

AU - Van Voorhies, W.

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