Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, China.
Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China.
Bioresour Technol. 2023 Oct;385:129468. doi: 10.1016/j.biortech.2023.129468. Epub 2023 Jul 8.
As mariculture develops, wastewater treatment becomes crucial. In this study, fixed-bed baffled reactors (FBRs) packed with carbon fiber (CFBR) or polyurethane (PFBR) as biofilm carriers were used for mariculture wastewater treatment. Under salinity shocks between 0.10 and 30.00 g/L, the reactors showed efficient and stable nitrogen removal capacities, and the maximum NH-N removal rates were 107.31 and 105.42 mg/(L·d) for CFBR and PFBR, respectively, with an initial NH-N concentration of 120.00 mg/L. Further, in the independent aerobic chambers of the FBRs for nitrogen removal, taxa enrichment varied depending on the biofilm carrier, and the assembly process was more deterministic in CFBR than in PFBR. Two distinct clusters representing the spatial distribution of the adhering and deposited sludge in CFBR and the front and rear compartments in PFBR were noted. Furthermore, microbial interactions were more numerous and stable in CFBR. These findings improve the application prospects of FBRs in mariculture wastewater treatment.
随着海水养殖业的发展，废水处理变得至关重要。本研究采用内置有碳纤维（CFBR）或聚氨酯（PFBR）生物膜载体的固定床挡板式反应器（FBR）来处理海水养殖废水。在盐度为 0.10 至 30.00 g/L 的冲击下，这些反应器表现出高效稳定的脱氮能力，当进水氨氮浓度为 120.00 mg/L 时，CFBR 和 PFBR 的最大氨氮去除率分别为 107.31 和 105.42 mg/（L·d）。此外，在 FBR 用于脱氮的独立好氧室中，根据生物膜载体的不同，分类群的富集也有所不同，而且 CFBR 中的组装过程比 PFBR 更具确定性。注意到 CFBR 中附着和沉积污泥的空间分布以及 PFBR 中前后隔室存在两个明显的聚类。此外，CFBR 中的微生物相互作用更多且更稳定。这些发现提高了 FBR 在海水养殖废水处理中的应用前景。
