Algal-based, single-step treatment of urban wastewaters

S. M. Henkanatte-Gedera, T. Selvaratnam, N. Caskan, N. Nirmalakhandan, W. Van Voorhies, Peter Lammers

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Currently, urban wastewaters (UWW) laden with organic carbon (BOD) and nutrients (ammoniacal nitrogen, N, and phosphates, P) are treated in multi-stage, energy-intensive process trains to meet the mandated discharge standards. This study presents a single-step process based on mixotrophic metabolism for simultaneous removal of carbon and nutrients from UWWs. The proposed system is designed specifically for hot, arid environments utilizing an acidophilic, thermotolerant algal species, Galdieria sulphuraria, and an enclosed photobioreactor to limit evaporation. Removal rates of BOD, N, and P recorded in this study (14.93, 7.23, and 1.38mgL-1d-1, respectively) are comparable to literature reports. These results confirm that the mixotrophic system can reduce the energy costs associated with oxygen supply in current UWW treatment systems, and has the potential to generate more energy-rich biomass for net energy extraction from UWW.

Original languageEnglish (US)
Pages (from-to)273-278
Number of pages6
JournalBioresource Technology
Volume189
DOIs
StatePublished - Aug 1 2015
Externally publishedYes

Fingerprint

Biochemical oxygen demand
Waste Water
Nutrients
Wastewater
Photobioreactors
Oxygen supply
Carbon
Organic carbon
Metabolism
Wastewater treatment
energy
Food
Evaporation
Phosphates
Biomass
Nitrogen
nutrient
arid environment
train
evaporation

Keywords

  • Galdieria sulphuraria
  • Mixotrophic metabolism
  • Nutrient removal
  • Organic removal
  • Wastewater treatment

ASJC Scopus subject areas

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

Cite this

Henkanatte-Gedera, S. M., Selvaratnam, T., Caskan, N., Nirmalakhandan, N., Van Voorhies, W., & Lammers, P. (2015). Algal-based, single-step treatment of urban wastewaters. Bioresource Technology, 189, 273-278. https://doi.org/10.1016/j.biortech.2015.03.120

Algal-based, single-step treatment of urban wastewaters. / Henkanatte-Gedera, S. M.; Selvaratnam, T.; Caskan, N.; Nirmalakhandan, N.; Van Voorhies, W.; Lammers, Peter.

In: Bioresource Technology, Vol. 189, 01.08.2015, p. 273-278.

Research output: Contribution to journalArticle

Henkanatte-Gedera, SM, Selvaratnam, T, Caskan, N, Nirmalakhandan, N, Van Voorhies, W & Lammers, P 2015, 'Algal-based, single-step treatment of urban wastewaters', Bioresource Technology, vol. 189, pp. 273-278. https://doi.org/10.1016/j.biortech.2015.03.120
Henkanatte-Gedera SM, Selvaratnam T, Caskan N, Nirmalakhandan N, Van Voorhies W, Lammers P. Algal-based, single-step treatment of urban wastewaters. Bioresource Technology. 2015 Aug 1;189:273-278. https://doi.org/10.1016/j.biortech.2015.03.120
Henkanatte-Gedera, S. M. ; Selvaratnam, T. ; Caskan, N. ; Nirmalakhandan, N. ; Van Voorhies, W. ; Lammers, Peter. / Algal-based, single-step treatment of urban wastewaters. In: Bioresource Technology. 2015 ; Vol. 189. pp. 273-278.
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