Tribonema sp. and Chlorella zofingiensis co-culture to treat swine wastewater diluted with fishery wastewater to facilitate harvest

Pengfei Cheng, Jay J. Cheng, Kirk Cobb, Chengxu Zhou, Nan Zhou, Min Addy, Paul Chen, Xiaojun Yan, Roger Ruan

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Cultivating microalgae on wastewaters is an effective way to produce algal biomass whereas harvesting microalgae is a costly operation. This study we examined the feasibility of co-culturing a high-value microalga with an auto-flocculating strain to enable efficient recovery of biomass. Experiments were conducted to co-cultivate Chlorella zofingiensis with Tribonema sp. on swine wastewater diluted by fishery wastewater under different conditions. The result showed the optimal inoculum ratio of Tribonema sp. to Chlorella zofingiensis was 1:1. The removal efficiencies of pollutants (NH4+-N, TN, TP, and COD) and lipid content were high when the co-culture ratios of Tribonema sp. were high. Also, some larger chain fatty acids, specifically C20:5 and C22:6 were present when the two strains co-culture. The recovery efficiency increased with the increasing proportion of auto-flocculating Tribonema sp. Algae co-culture has the potential to address limitations in substrate utilization by individual strains, also improve the recovery of biomass.

Original languageEnglish (US)
Article number122516
JournalBioresource Technology
Volume297
DOIs
StatePublished - Feb 2020

Keywords

  • Chlorella zofingiensis
  • Co-culture
  • Fishery wastewater
  • Harvest efficiency
  • Swine wastewater
  • Tribonema sp.

PubMed: MeSH publication types

  • Journal Article

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