Cultivation of Chlorella vulgaris in a pilot-scale photobioreactor using real centrate wastewater with waste glycerol for improving microalgae biomass production and wastewater nutrients removal

Hongyan Ren, Jinhua Tuo, Min M Addy, Renchuan Zhang, Qian Lu, Erik Anderson, Paul L Chen, R. R Ruan

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

To improve nutrients removal from real centrate wastewater and enhance the microalgae biomass production, cultivation of Chlorella vulgaris in lab and a pilot-scale photobioreactor with waste glycerol was studied. The results showed the optimal concentration of the crude glycerol was 1.0 g L−1 with the maximum biomass productivity of 460 mg L−1 d−1 TVS, the maximum lipid content of 27%, the nutrient removal efficiency of all above 86%, due to more balanced C/N ratio. The synergistic relationship between the wastewater-borne bacteria and the microalgae had significant good influence on nutrient removal. In pilot-scale wastewater-based algae cultivation, with 1 g L−1 waste glycerol addition, the average biomass production of 16.7 g m−2 d−1, lipid content of 23.6%, and the removal of 2.4 g m−2 d−1 NH4+-N, 2.7 g m−2 d−1 total nitrogen, 3.0 g m−2 d−1 total phosphorous, and 103.0 g m−2 d−1 of COD were attained for 34 days semi-continuous mode.

Original languageEnglish (US)
Pages (from-to)1130-1138
Number of pages9
JournalBioresource Technology
Volume245
DOIs
StatePublished - Jan 1 2017

Keywords

  • Centrate wastewater
  • Microalgae
  • Nutrient removal
  • Pilot-scale photobioreactor
  • Waste glycerol

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