Evaluation of microalgae production coupled with wastewater treatment

Davide De Francisci*, Yixi Su, Arvo Iital, Irini Angelidaki

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

363 Downloads (Pure)

Abstract

In the present study the feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation of Chlorella sorokiniana with wastewater was tested in lab-scale flat panel photobioreactors. Biomass productivity was determined for four dilution rates (4.32 d-1, 3.6 d-1, 1.8 d-1 and 0.72 d-1). The productivity peak was 1.524 g l-1d-1 at the dilution rate of 2.41 d-1. Nitrogen and phosphorus removals were found to be inversely proportional to dilution rates, while COD removal was found to be 50% at all the tested conditions. The biomass obtained at the highest dilution rate was characterized for its content of lipids, proteins and pigments. The average yields of fatty acid methyl esters (FAME), protein, lutein, chlorophylls and β-carotene was 62.4 mg, 388.2 mg, 1.03 mg, 11.82 mg and 0.44 mg per gram dry biomass, respectively. Economic analysis revealed that potentially more than 70% of revenue was from the production of pigments, i.e. chlorophyllin (59.6%), lutein (8.9%) and β-carotene (5.0%) while reduction in discharging costs of the treated wastewaters could account for 19.6% of the revenue. Due to the low yield of FAME and the low market price of biodiesel, the revenue from the above was found to be the least profitable (1.4%). Even when taking into account all these different revenues combined, this cultivation strategy was found with the current prices to be uneconomical. Power consumption for artificial light was responsible for the 94.5% of the production costs.
Original languageEnglish
JournalEnvironmental Technology
Volume39
Issue number5
Pages (from-to)581-592
ISSN0959-3330
DOIs
Publication statusPublished - 2018

Keywords

  • Chlorella sorokiniana
  • biorefinery
  • economic analysis
  • photobioreactors
  • wastewaters

Cite this

De Francisci, Davide ; Su, Yixi ; Iital, Arvo ; Angelidaki, Irini. / Evaluation of microalgae production coupled with wastewater treatment. In: Environmental Technology. 2018 ; Vol. 39, No. 5. pp. 581-592.
@article{8f3164523b4a46f8913247dd1172c901,
title = "Evaluation of microalgae production coupled with wastewater treatment",
abstract = "In the present study the feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation of Chlorella sorokiniana with wastewater was tested in lab-scale flat panel photobioreactors. Biomass productivity was determined for four dilution rates (4.32 d-1, 3.6 d-1, 1.8 d-1 and 0.72 d-1). The productivity peak was 1.524 g l-1d-1 at the dilution rate of 2.41 d-1. Nitrogen and phosphorus removals were found to be inversely proportional to dilution rates, while COD removal was found to be 50{\%} at all the tested conditions. The biomass obtained at the highest dilution rate was characterized for its content of lipids, proteins and pigments. The average yields of fatty acid methyl esters (FAME), protein, lutein, chlorophylls and β-carotene was 62.4 mg, 388.2 mg, 1.03 mg, 11.82 mg and 0.44 mg per gram dry biomass, respectively. Economic analysis revealed that potentially more than 70{\%} of revenue was from the production of pigments, i.e. chlorophyllin (59.6{\%}), lutein (8.9{\%}) and β-carotene (5.0{\%}) while reduction in discharging costs of the treated wastewaters could account for 19.6{\%} of the revenue. Due to the low yield of FAME and the low market price of biodiesel, the revenue from the above was found to be the least profitable (1.4{\%}). Even when taking into account all these different revenues combined, this cultivation strategy was found with the current prices to be uneconomical. Power consumption for artificial light was responsible for the 94.5{\%} of the production costs.",
keywords = "Chlorella sorokiniana, biorefinery, economic analysis, photobioreactors, wastewaters",
author = "{De Francisci}, Davide and Yixi Su and Arvo Iital and Irini Angelidaki",
year = "2018",
doi = "10.1080/09593330.2017.1308441",
language = "English",
volume = "39",
pages = "581--592",
journal = "Environmental Technology",
issn = "0959-3330",
publisher = "CRC Press/Balkema",
number = "5",

}

Evaluation of microalgae production coupled with wastewater treatment. / De Francisci, Davide; Su, Yixi; Iital, Arvo; Angelidaki, Irini.

In: Environmental Technology, Vol. 39, No. 5, 2018, p. 581-592.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Evaluation of microalgae production coupled with wastewater treatment

AU - De Francisci, Davide

AU - Su, Yixi

AU - Iital, Arvo

AU - Angelidaki, Irini

PY - 2018

Y1 - 2018

N2 - In the present study the feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation of Chlorella sorokiniana with wastewater was tested in lab-scale flat panel photobioreactors. Biomass productivity was determined for four dilution rates (4.32 d-1, 3.6 d-1, 1.8 d-1 and 0.72 d-1). The productivity peak was 1.524 g l-1d-1 at the dilution rate of 2.41 d-1. Nitrogen and phosphorus removals were found to be inversely proportional to dilution rates, while COD removal was found to be 50% at all the tested conditions. The biomass obtained at the highest dilution rate was characterized for its content of lipids, proteins and pigments. The average yields of fatty acid methyl esters (FAME), protein, lutein, chlorophylls and β-carotene was 62.4 mg, 388.2 mg, 1.03 mg, 11.82 mg and 0.44 mg per gram dry biomass, respectively. Economic analysis revealed that potentially more than 70% of revenue was from the production of pigments, i.e. chlorophyllin (59.6%), lutein (8.9%) and β-carotene (5.0%) while reduction in discharging costs of the treated wastewaters could account for 19.6% of the revenue. Due to the low yield of FAME and the low market price of biodiesel, the revenue from the above was found to be the least profitable (1.4%). Even when taking into account all these different revenues combined, this cultivation strategy was found with the current prices to be uneconomical. Power consumption for artificial light was responsible for the 94.5% of the production costs.

AB - In the present study the feasibility of microalgae production coupled with wastewater treatment was assessed. Continuous cultivation of Chlorella sorokiniana with wastewater was tested in lab-scale flat panel photobioreactors. Biomass productivity was determined for four dilution rates (4.32 d-1, 3.6 d-1, 1.8 d-1 and 0.72 d-1). The productivity peak was 1.524 g l-1d-1 at the dilution rate of 2.41 d-1. Nitrogen and phosphorus removals were found to be inversely proportional to dilution rates, while COD removal was found to be 50% at all the tested conditions. The biomass obtained at the highest dilution rate was characterized for its content of lipids, proteins and pigments. The average yields of fatty acid methyl esters (FAME), protein, lutein, chlorophylls and β-carotene was 62.4 mg, 388.2 mg, 1.03 mg, 11.82 mg and 0.44 mg per gram dry biomass, respectively. Economic analysis revealed that potentially more than 70% of revenue was from the production of pigments, i.e. chlorophyllin (59.6%), lutein (8.9%) and β-carotene (5.0%) while reduction in discharging costs of the treated wastewaters could account for 19.6% of the revenue. Due to the low yield of FAME and the low market price of biodiesel, the revenue from the above was found to be the least profitable (1.4%). Even when taking into account all these different revenues combined, this cultivation strategy was found with the current prices to be uneconomical. Power consumption for artificial light was responsible for the 94.5% of the production costs.

KW - Chlorella sorokiniana

KW - biorefinery

KW - economic analysis

KW - photobioreactors

KW - wastewaters

U2 - 10.1080/09593330.2017.1308441

DO - 10.1080/09593330.2017.1308441

M3 - Journal article

VL - 39

SP - 581

EP - 592

JO - Environmental Technology

JF - Environmental Technology

SN - 0959-3330

IS - 5

ER -