LIWET, Department of Green Chemistry and Technology, Ghent University Campus Kortrijk, Sint-Martens-Latemlaan 2B, 8500 Kortrijk, Belgium.
LIWET, Department of Green Chemistry and Technology, Ghent University Campus Kortrijk, Sint-Martens-Latemlaan 2B, 8500 Kortrijk, Belgium.
Bioresour Technol. 2024 Nov;411:131331. doi: 10.1016/j.biortech.2024.131331. Epub 2024 Aug 22.
Microalgal-bacterial granular sludge (MBGS) could offer a sustainable alternative to traditional aerobic methods in brewery wastewater (BWW) treatment. This study compared MBGS with conventional activated sludge (AS) in treating real BWW and highlighted its advantages and challenges. MBGS achieved comparable chemical oxygen demand removal efficiency (93%) compared to AS (89%). Additionally, MBGS exhibited higher phosphate removal capabilities than AS. Extra nitrogen was added to influent to balance C/N ratio of BWW. MBGS was robust in handling C/N ratio fluctuations with an 82% total nitrogen removal efficiency. Metagenomic analysis further indicated that most of the genes involved in carbon, nitrogen and phosphorus metabolism were up-regulated in MBGS compared to AS. Despite changes in the microbial community and settling ability due to high starch and sugar content in BWW, MBGS demonstrated high efficiency and sustainability. Further research should optimize MBGS operation strategies to fully realize its potential for sustainable BWW treatment.
微藻-细菌颗粒污泥（MBGS）可以为传统的好氧方法在啤酒废水（BWW）处理中提供可持续的替代方案。本研究比较了 MBGS 与传统活性污泥（AS）在处理实际 BWW 方面的优缺点。MBGS 实现了与 AS（89%）相当的化学需氧量去除效率（93%）。此外，MBGS 表现出比 AS 更高的磷酸盐去除能力。在进水处添加额外的氮以平衡 BWW 的 C/N 比。MBGS 能够在处理 C/N 比波动时保持高效，总氮去除效率达到 82%。宏基因组分析进一步表明，与 AS 相比，MBGS 中参与碳、氮和磷代谢的大多数基因都被上调。尽管由于 BWW 中高淀粉和糖含量导致微生物群落和沉降能力发生变化，但 MBGS 仍表现出高效和可持续性。进一步的研究应优化 MBGS 操作策略，以充分发挥其在可持续 BWW 处理中的潜力。
