Integrating acidogenic fermentation and microalgae cultivation of bacterial-algal coupling system for mariculture wastewater treatment

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

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this study, Bacterial-Algal Coupling System, a method integrated acidogenic fermentation (AF) and microalgae cultivation, was applied to the mariculture wastewater (MW) treatment. The MW was acidogenic fermented at different initial pH (4.0–10.0), and different dilution rate (5%-20%) of AF effluent was used for Chlorella vulgaris cultivation. The results showed that the maximum biomass production (5.6 g/L) of microalgae was obtained with 10% AF effluent. Ammonium, phosphate and volatile fatty acids could be metabolized by microalgae. More specifically, acetic acid and propionic acid were utilized prior to butyric acid and valeric acid. To better understand the synergy of heterotrophic metabolism and photosynthesis, the activities of Rubisco and citrate synthase were revealed to provide additional insight for nutrients recovery from MW by mixotrophic cultivation of microalgae.

Original languageEnglish
Article number124335
JournalBioresource Technology
Volume320
ISSN0960-8524
DOIs
Publication statusPublished - 2021

Keywords

  • Acidogenic fermentation
  • Bacterial-Algal Coupling System
  • Enzyme activity
  • Mariculture wastewater
  • Mixotrophy microalgae

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