Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan, 430065, China.
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia.
Bioprocess Biosyst Eng. 2021 Aug;44(8):1733-1739. doi: 10.1007/s00449-021-02556-0. Epub 2021 Mar 27.
Microalgal-bacterial granular sludge (MBGS) process has become a focal point in treating municipal wastewater. However, it remains elusive whether the emerging process can be applied for the treatment of aquaculture wastewater, which contains considerable concentrations of nitrate and nitrite. This study evaluated the feasibility of MBGS process for aquaculture wastewater treatment. Result showed that the MBGS process was competent to remove respective 64.8%, 84.9%, 70.8%, 50.0% and 84.2% of chemical oxygen demand, ammonia-nitrogen, nitrate-nitrogen, nitrite-nitrogen and phosphate-phosphorus under non-aerated conditions within 8 h. The dominant microalgae and bacteria were identified to be Coelastrella and Rhodobacteraceae, respectively. Further metagenomics analysis implied that microbial assimilation was the main contributor in organics, nitrogen and phosphorus removal. Specifically, considerable nitrate and nitrite removals were also obtained with the synergy between microalgae and bacteria. Consequently, this work demonstrated that the MBGS process showed a prospect of becoming an environmentally friendly and efficient alternative in aquaculture wastewater treatment.
微藻-细菌颗粒污泥（MBGS）工艺已成为处理城市污水的焦点。然而，新兴的工艺是否可用于处理含有相当高浓度硝酸盐和亚硝酸盐的养殖废水仍不清楚。本研究评估了 MBGS 工艺处理养殖废水的可行性。结果表明，MBGS 工艺在非曝气条件下 8 h 内可分别去除化学需氧量、氨氮、硝酸盐氮、亚硝酸盐氮和磷酸盐磷的 64.8%、84.9%、70.8%、50.0%和 84.2%。优势微藻和细菌分别被鉴定为绿球藻和红杆菌科。进一步的宏基因组学分析表明，微生物同化是有机物、氮和磷去除的主要贡献者。具体来说，微藻和细菌的协同作用也实现了可观的硝酸盐和亚硝酸盐去除。因此，这项工作表明 MBGS 工艺有望成为一种环保且高效的养殖废水处理替代方法。
