Enhancement of mariculture wastewater treatment using moving bed biofilm reactors filled with modified biocarriers: Characterisation, process performance and microbial community evaluation.

Journal of Environmental Management
Abubakar ShituDezhao Liu

Abstract

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 (C2FeO4@SB), and modified novel SB with combined ferrous oxalate and activated carbon (C2FeO4-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, C2FeO4 and AC accelerated biofilm formations and stability, subsequently enhanced the removal of ammonia from the mariculture RAS wastewater by the C2FeO4-AC@SB carriers in R3.

References

Jun 28, 2011·Genome Biology·Nicola SegataCurtis Huttenhower
Mar 18, 2016·Water Research·Blanca M Gonzalez-SilvaOlav Vadstein
Jun 4, 2019·Water Research·Tim HülsenDamien J Batstone
Jul 22, 2019·Journal of Environmental Management·Changwei LiDezhao Liu
Dec 7, 2019·Environmental Science and Pollution Research International·Xiang FeiWeili Zhou
Feb 29, 2020·Bioresource Technology·Fares Almomani, Rahul R Bohsale
Jul 1, 2020·The Science of the Total Environment·Changwei LiDezhao Liu
Dec 2, 2020·The Science of the Total Environment·Xiaowen ZhuAiduan Borrion

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