Interaction between microalgae and phycosphere bacteria in a binary cultivation system-based dairy farm wastewater treatment

被引:6
作者
Cao, Yuang [1 ,2 ]
Zhi, Suli [1 ]
Phyu, Khinkhin [1 ]
Wang, Han [1 ]
Liu, Jiahua [1 ]
Xu, Xiaoyu [1 ]
Zhang, Keqiang [1 ,2 ]
机构
[1] Minist Agr & Rural Affairs, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
[2] Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China
关键词
Microalgae; Dairy farm wastewater; Extracellular polymeric substance; Microalgal-bacterial systems; Phycosphere bacteria; EXTRACELLULAR POLYMERIC SUBSTANCES; GROWTH; DIVERSITY; REMOVAL; SP;
D O I
10.1016/j.biortech.2024.131248
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The combination of microalgal culture and wastewater treatment is an emerging topic. This study investigated the use of different microalgae to treat different types of dairy farm wastewater. The results showed that the removal of ammonia nitrogen and total phosphorus by mixed microalgae was over 99% and 80%, respectively. The highest production of protein in biomass and extracellular polymeric substances was observed in highconcentration wastewater. In the phycosphere, the abundance of Proteobacteria and Cyanobacteria increased, while that of Bacteroidota decreased. Phycosphere bacteria were strongly correlated with microalgal growth and the composition of extracellular polymeric substances, especially with bound extracellular polymeric substances relative to soluble extracellular polymeric substances. Genes associated with photosynthesis and respiration in phycosphere bacteria were upregulated, contributing to the material exchange capacity in the microalgalbacterial systems. The interaction between microalgae and phycosphere bacteria thus represents the core of the binary cultivation system-based wastewater treatment and requires further investigation.
引用
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页数:11
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