Growing Chlorella sp. on meat processing wastewater for nutrient removal and biomass production

Qian Lu, Wenguang Zhou, Min Min, Xiaochen Ma, Ceria Chandra, Yen T.T. Doan, Yiwei Ma, Hongli Zheng, Sibo Cheng, Richard Griffith, Paul Chen, Chi Chen, Pedro E. Urriola, Gerald C. Shurson, Hans R. Gislerød, Roger Ruan

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

In this work, Chlorella sp. (UM6151) was selected to treat meat processing wastewater for nutrient removal and biomass production. To balance the nutrient profile and improve biomass yield at low cost, an innovative algae cultivation model based on wastewater mixing was developed. The result showed that biomass yield (0.675-1.538. g/L) of algae grown on mixed wastewater was much higher than that on individual wastewater and artificial medium. Wastewater mixing eased the bottleneck for algae growth and contributed to the improved biomass yield. Furthermore, in mixed wastewater with sufficient nitrogen, ammonia nitrogen removal efficiencies (68.75-90.38%) and total nitrogen removal efficiencies (30.06-50.94%) were improved. Wastewater mixing also promoted the synthesis of protein in algal cells. Protein content of algae growing on mixed wastewater reached 60.87-68.65%, which is much higher than that of traditional protein source. Algae cultivation model based on wastewater mixing is an efficient and economical way to improve biomass yield.

Original languageEnglish (US)
Pages (from-to)189-197
Number of pages9
JournalBioresource Technology
Volume198
DOIs
StatePublished - Dec 1 2015

Bibliographical note

Funding Information:
This work was in part supported by Grants from Minnesota Legislative-Citizen Commission on Minnesota Resources ( LCCMR ), UMN MnDRIVE and Center for Biorefining .

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • Algae cultivation
  • Biomass
  • Nutrient removal
  • Protein
  • Wastewater

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