使用填充改性生物载体的移动床生物膜反应器强化海水养殖废水处理：特性分析、工艺性能及微生物群落评价。
Enhancement of mariculture wastewater treatment using moving bed biofilm reactors filled with modified biocarriers: Characterisation, process performance and microbial community evaluation.
机构信息
Institute of Agricultural Bio-Environmental Engineering, College of Bio-systems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China; Department of Agricultural and Environmental Engineering, Faculty of Engineering, Bayero University, Kano, Nigeria.
Institute of Agricultural Bio-Environmental Engineering, College of Bio-systems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China.
出版信息
J Environ Manage. 2021 Aug 1;291:112724. doi: 10.1016/j.jenvman.2021.112724. Epub 2021 May 4.
This research investigated two proposed modified biofilm carriers' performances in treating recirculating aquaculture systems (RAS) wastewater under different salinities (12‰, 26‰, and 35‰) for about 92 days. Three moving bed biofilm reactors (MBBRs; R1, R2, and R3) were filled with unmodified novel sponge biocarriers (SB) served as a control, modified novel SB with ferrous oxalate (CFeO@SB), and modified novel SB with combined ferrous oxalate and activated carbon (CFeO-AC@SB), respectively. Under the highest saline condition, a significantly higher ammonia removal efficiency of 98.86 ± 0.7% (p ˃ 0.05) was obtained in R3, whereas R2 and R1 yielded 95.18 ± 2.8% and 91.66 ± 1.5%, respectively. Microbial analysis showed that Vibrio, Ruegeria, Formosa, Thalassospira, and Denitromonas were predominant genera, strictly halophilic heterotrophic nitrifying bacteria involved in nitrogen removal. In conclusion, the synergistic effects of novel sponge, CFeO and AC accelerated biofilm formations and stability, subsequently enhanced the removal of ammonia from the mariculture RAS wastewater by the CFeO-AC@SB carriers in R3.
本研究调查了两种改良生物膜载体在不同盐度（12‰、26‰和 35‰）下处理循环水产养殖系统（RAS）废水的性能，为期约 92 天。三个移动床生物膜反应器（MBBR；R1、R2 和 R3）分别填充未改性新型海绵生物载体（SB）作为对照、用草酸亚铁改性的新型 SB（CFeO@SB）和用草酸亚铁和活性炭复合改性的新型 SB（CFeO-AC@SB）。在最高盐度条件下，R3 中氨去除效率达到 98.86 ± 0.7%（p ˃ 0.05），而 R2 和 R1 的氨去除效率分别为 95.18 ± 2.8%和 91.66 ± 1.5%。微生物分析表明，弧菌、鲁杰氏菌、假交替单胞菌、海单胞菌和脱氮假单胞菌是主要属，参与氮去除的严格嗜盐异养硝化细菌。总之，新型海绵、CFeO 和 AC 的协同作用加速了生物膜的形成和稳定性，随后增强了 CFeO-AC@SB 载体在 R3 中从海水养殖 RAS 废水中去除氨的能力。
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