Abstract
The potential of a trickling bioreactor (TBR) for the gas-phase treatment of N2O in the range of 0.9–7.5 g m−3 in the presence of two separate carbon sources (glucose and phenol) and ammonium chloride as the nitrogen source was investigated under anoxic condition. With glucose, at the carbon to nitrogen supplying ratio (C:N) of 1.5, removal efficiency (RE) of 60%, and elimination capacity (EC) of 10.1 g m−3 h−1 were obtained for N2O at an inlet concentration of 4.2 g m−3, corresponding to an inlet loading rate (ILR) of 16 g m−3 h−1. Also, for the co-treatment of N2O and phenol, the highest RE of 71 ± 1% was obtained when N2O and phenol concentrations were 0.36 ± 0.04 g m−3 and 850 mg L−1, respectively. Also, based on the whole genome sequencing analysis for the TBR treating phenol and N2O, Castellaniella, Acidovorax, Stenotrophomonas, Sphingopyxis, and Diaphorobacter were the dominant species.
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