Cultivation of Chlorella vulgaris on anaerobically digested swine manure with daily recycling of the post-harvest culture broth

Xiang Yuan Deng, Kun Gao, Min Addy, Da Li, Ren Chuan Zhang, Qian Lu, Yi Wei Ma, Yan Ling Cheng, Paul Chen, Yu Huan Liu, Roger Ruan

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20 Scopus citations

Abstract

In this work, a cultivation system with daily recycling of the post-harvest culture broth was set up and performed in order to reuse the water and nutrients in pretreated anaerobically digested swine manure, which was used as media to cultivate Chlorella vulgaris (UTEX 2714) at different recycling ratios. Results showed that the alga grew well in the system with an accumulative algal biomass and productivity of 1.68–3.47 g/L and 234.1–532.2 mg/L/d, respectively, at the end of the cultivation. Additionally, chemical compositions in this alga varied with the change of recycling ratios, and the highest productivities of carbohydrate, protein and lipids (76.4, 257.2 and 183.7 mg/L/d, respectively) were obtained in the system with a recycling ratio of 1/4 or 1/6. Fatty acid profiles indicated that this alga could be used as a good-quality biodiesel feedstock with a biodiesel productivity of 9.65–40.1 mg/L/d.

Original languageEnglish (US)
Pages (from-to)716-723
Number of pages8
JournalBioresource Technology
Volume247
DOIs
StatePublished - Jan 1 2018

Keywords

  • Anaerobically digested swine manure
  • Biomass productivity
  • Chlorella vulgaris
  • Daily recycling
  • Nutrient removal
  • Post-harvest

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