Performance of novel sponge biocarrier in MBBR treating recirculating aquaculture systems wastewater: Microbial community and kinetic study.

Autor: Shitu A; College of Bio-systems Engineering and Food Science, Zhejiang University, 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., Zhu S; College of Bio-systems Engineering and Food Science, Zhejiang University, Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China. Electronic address: zhusm@zju.edu.cn., Qi W; College of Bio-systems Engineering and Food Science, Zhejiang University, Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China., Tadda MA; College of Bio-systems Engineering and Food Science, Zhejiang University, 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., Liu D; College of Bio-systems Engineering and Food Science, Zhejiang University, Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China., Ye Z; College of Bio-systems Engineering and Food Science, Zhejiang University, Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, Hangzhou, 310058, China.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2020 Dec 01; Vol. 275, pp. 111264. Date of Electronic Publication: 2020 Aug 24.
DOI: 10.1016/j.jenvman.2020.111264
Abstrakt: In this study, a novel sponge biocarriers (SB) in moving bed bioreactor (MBBR) treating recirculating aquaculture systems wastewater was evaluated for the first time. Two lab-scale MBBRs were operated simultaneously for 116 days under various hydraulic retention times (HRTs). The reactors R1 and R2 were filled with K5 plastic carriers and SB, respectively. From the results, at an optimum HRT of 6 h, ammonia removal efficiency and nitrification rate were 86.67 ± 2.4% and 1.43 mg/L.h for the R1 and, 91.65 ± 1.3% and 1.52 mg/L.h for the R2, respectively. The microbial community analysis showed that the predominant genera in the nitrifying community were Nitrosomonas (AOB) and Nitrospira (NOB) in co-existence with heterotrophic genera Hyphomicrobium, Mesorhizobium, Zhizhongheella, and Klebsiella spp. Modified Stover-Kincannon model examined the ammonia removal kinetics, and the values of kinetic parameters obtained were U max : 0.909 and 1.111 g/L.d and K B : 0.929 and, 1.108 g/L.d for the R1 and R2, respectively. The correlation coefficients (R 2 ) of the MBBRs were higher than 0.98, indicating that the model adequately described the experimental data. Overall, MBBR, filled with the proposed novel SB operated at 6 h HRT, can achieve the highest nitrification performance and increase the diversity of the functional microbial communities.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: