Granule size informs the characteristics and performance of microalgal-bacterial granular sludge for wastewater treatment

作者：Zhang, Meng; Ji, Bin; Wang, Shulian; Gu, Jun; Liu, Yu^*

来源：Bioresource Technology, 2022, 346: 126649.

DOI：10.1016/j.biortech.2021.126649

• Microalgal-bacterial granular sludge
• Granule size
• Process performance
• Granule characteristics
• Microbial community

In this study, four groups of microalgal-bacterial granules with averaged diameters of about 356, 760, 951 and 1,444 mu m were used to investigate their characteristics and performance in treating wastewater. A strong correlation between extracellular polymeric substances of microalgal-bacterial granules and the granule size was observed. Moreover, granule size showed a positive effect on the specific organics removal rate, but being negative for ammonium and phosphorus removal. It appeared that granule size could be used as a useful index to reflect the synergistic interactions between microalgae and bacteria in terms of the abundances, distributions and functional species in the microalgal-bacterial granules. This study is expected to offer new insights into the sizedependent performances of microalgal-bacterial granules for wastewater treatment.

• 单位
  y; 南阳理工学院; 1