Understanding the impacts of operation mode sequences on the biological aniline degradation system: Startup phase, pollutants removal rules and microbial response. (November 2021)

• Record Type: Journal Article
• Authors: Peng, Haojin; Zhang, Qian; Tan, Bin; Li, Meng; Feng, Jiapeng; Zhang, Yunjie; He, Jing; Su, Junhao; Zhong, Min
• Is Part Of: Bioresource technology. Volume 340(2021)
• Publication Date: 2021-11
• Subjects: Operation mode sequences -- Aniline degrading reactor -- Startup -- Nitrogen removal -- Functional microbial community; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125758
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Four reactors all achieved efficient aniline degradation and nitrification. Anaerobic aniline degradation could be evolved with the operation of the reactors. Operation mode sequences controlled the system-dominated denitrification pattern. O/AX mode best fitted for the demands of aniline and simultaneous nitrogen removal. Abstract: Comparative evaluation of SBRs under different modes (AX/O, AN/AX/O, AN/O/AX, O/AX) with same aniline wastewater arrangements, presenting the startup and performance differences of reactors. The results revealed that the four systems realized the efficient aniline and NH4 + -N removal on the basis of sufficient aerobic time. Anaerobic aniline degradation was also achieved in the first three reactors after acclimation. The denitrification efficiency was the highest in O/AX reactor and the lowest in AN/O/AX due to mode sequence setup. Pollutants variations in the typical cycles experimental data combined with microbial diversity analysis were highlighted that aerobic denitrification contributed the most under O/AX mode, while the other three modes relied on anoxic denitrification. Meanwhile, low nitrifiers and aerobic denitrifiers abundance might be another reason for the poor denitrification of AN/O/AX mode. It was inferred that denitrification was most susceptible to operation mode sequences.