Cultivation of Chlorella vulgaris in sludge extracts: Nutrient removal and algal utilization

Lu Wang, Min M Addy, Qian Lu, Kirk Cobb, Paul L Chen, Xiurong Chen, Yuhuan Liu, Hualin Wang, R. R Ruan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to utilize the excess sludge and reduce the cost of algal cultivation, Chlorella vulgaris was cultivated in increasing proportions of sludge extracts for simultaneous nutrients removal and algal utilization. Results showed that C. vulgaris cultivated in the 100% sludge extract gained the highest total biomass (33.98 ± 0.30 × 10 6 cells/mL) and showed good results in TOC (absolute value 175 mg/L) and nutrients (TN: 77.1%; TP: 95.0%) removals. According to the Excitation-emission matrix spectra (EEMs) analysis, the 8th day was suggested as the optimal time for biomass harvesting. Although the lipid contents showed a negative correlation with the proportion of sludge extract, the FAME analysis showed that the saturated fatty acids (SFA) contents decreased and the unsaturated fatty acids (UFA) content increased as the concentration of sludge extract increased. The 100% sludge extract could be a desirable alternative medium for the algae cultivation.

Original languageEnglish (US)
Pages (from-to)505-510
Number of pages6
JournalBioresource Technology
Volume280
DOIs
StatePublished - May 1 2019

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Nutrients
Biomass
sludge
Saturated fatty acids
Unsaturated fatty acids
Algae
Unsaturated Fatty Acids
Spectrum analysis
Lipids
Fatty Acids
fatty acid
Costs
biomass
nutrient removal
lipid
alga
matrix
nutrient
cost
analysis

Keywords

  • Algal utilization
  • Chlorella vulgaris
  • Low-cost cultivation
  • Nutrient removal
  • Sludge extracts

PubMed: MeSH publication types

  • Journal Article

Cite this

Cultivation of Chlorella vulgaris in sludge extracts : Nutrient removal and algal utilization. / Wang, Lu; Addy, Min M; Lu, Qian; Cobb, Kirk; Chen, Paul L; Chen, Xiurong; Liu, Yuhuan; Wang, Hualin; Ruan, R. R.

In: Bioresource Technology, Vol. 280, 01.05.2019, p. 505-510.

Research output: Contribution to journalArticle

Wang, Lu ; Addy, Min M ; Lu, Qian ; Cobb, Kirk ; Chen, Paul L ; Chen, Xiurong ; Liu, Yuhuan ; Wang, Hualin ; Ruan, R. R. / Cultivation of Chlorella vulgaris in sludge extracts : Nutrient removal and algal utilization. In: Bioresource Technology. 2019 ; Vol. 280. pp. 505-510.
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AU - Chen, Xiurong

AU - Liu, Yuhuan

AU - Wang, Hualin

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