Bacterial-algal coupling system for high strength mariculture wastewater treatment: Effect of temperature on nutrient recovery and microalgae cultivation

Zengshuai Zhang, Liang Guo, Qianru Liao, Mengchun Gao, Yangguo Zhao, Chunji Jin, Zonglian She, Guangce Wang

Research output: Contribution to journalJournal articlepeer-review

Abstract

In the present study, bacterial-algal coupling system, an integration process of acidogenic fermentation and microalgae cultivation was used for high strength mariculture wastewater (HSMW) treatment, resource recovery and low-cost biomass production. The effect of temperature on Chlorella vulgaris (C. vulgaris) cultivation was investigated with culture medium of acidogenic liquid. The results showed that acidogenic liquid could be used as culture medium for C. vulgaris and higher biomass was obtained compared to control. The acidogenic liquid obtained at initial pH of 8 was the most suitable culture medium for C. vulgaris growth due to befitting C/N and considerable volatile fatty acids. Moreover, the optimum temperature for C. vulgaris cultivation was 25 °C and the removal efficiency of chemical oxygen demand (COD) and NH4+-N from acidogenic liquid could reach 94.4% and 68.8%, respectively. The outcome could create an innovative value chain with environmental sustainability and economic feasibility in aquaculture industry.
Original languageEnglish
Article number125574
JournalBioresource Technology
Volume338
Number of pages10
ISSN0960-8524
DOIs
Publication statusPublished - 2021

Keywords

  • Bacterial-algal coupling system
  • High strength mariculture wastewater
  • Microalgae cultivation
  • Resource recovery

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