期刊
BIORESOURCE TECHNOLOGY
卷 351, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127019
关键词
Microalgae-bacteria interaction; Extracellular polymeric substances; Nitrogen transport; Starch synthesis; Energy conversion
资金
- National Key Research and Devel-opment Program [2019YFC0408503]
- Project of Thousand Youth Talents [AUGA2160100917]
Microalgal-bacterial system (MBS) has the potential for efficient wastewater treatment and energy production. This study discovered that MBS can enhance the adsorption and transport of nitrogen through electrical neutralization and extracellular polymeric substances (EPS). The interaction between microalgae and bacteria accelerates the removal of nitrogen from aqueous solutions.
Microalgal-bacterial system (MBS) is potential biotechnology in wastewater treatment because it can remedy defects of conventional processes (e.g., insufficient carbon source and imbalanced elements ratio). However, the mechanisms of nitrogen (N) transport and removal in MBS are still unclear. In this study, it was discovered that MBS was conducive to adsorb NH4+-N and NO3--N through electrical neutralization, while extracellular polymeric substances (EPS) could provide binding sites (e.g., -OH and -CH3) for enhancing N transport and removal. The microalgae-bacteria interaction could accelerate N transport and removal from aqueous solution to cell. More importantly, the microalgal starch biosynthetic metabolism exhibited demonstrating the energy production potential could be boosted via MBS. Overall, the NO3--N and NH4+-N removal efficiencies, and energy yield were 82.28%, 94.15%, and 86.81 kJ/L, respectively, which are better than other relevant studies. Altogether, it is meaningful for revealing the applicability of MBS for treating wastewater and producing energy.
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