Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China.
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
Bioresour Technol. 2024 Oct;409:131248. doi: 10.1016/j.biortech.2024.131248. Epub 2024 Aug 8.
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 high-concentration 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 microalgal-bacterial systems. The interaction between microalgae and phycosphere bacteria thus represents the core of the binary cultivation system-based wastewater treatment and requires further investigation.
微藻培养与废水处理相结合是一个新兴的课题。本研究探讨了不同微藻处理不同类型奶牛场废水的应用。结果表明，混合微藻对氨氮和总磷的去除率分别超过 99%和 80%。在高浓度废水中，生物质和胞外聚合物中蛋白质的最高产量最高。在藻体中，变形菌门和蓝藻门的丰度增加，而拟杆菌门的丰度减少。藻体细菌与微藻的生长和胞外聚合物的组成密切相关，特别是与结合态胞外聚合物与可溶态胞外聚合物的相关性。与藻体细菌光合作用和呼吸作用相关的基因被上调，有助于提高微藻-细菌系统的物质交换能力。因此，藻体细菌之间的相互作用是二元培养系统处理废水的核心，需要进一步研究。
