Release time:2023-10-19  Hits:

• Key Words:ANTIBIOTIC-RESISTANCE GENES; BIOFILM ELECTRODE REACTOR; FUEL-CELL; CONSTRUCTED WETLAND; ELECTRICITY PRODUCTION; REMOVAL; DEGRADATION; FATE; CHLORAMPHENICOL; PATHWAY
• Abstract:A biofilm electrode system (BES), which is the combination of a constructed wetland-microbial fuel cell (MFCCW) with a biofilm electrode reactor (BER), was used to treat wastewater that contained sulfamethoxazole for three months. The variation in the microbial community, including the microbial diversity, was explored. Furthermore, the key operating factors were identified, and the sul genes-harboring host bacteria were revealed. The results demonstrated that the species richness in the BER was greater than in the MFC-CW, but the Shannon index was susceptible to the run time. The Beta diversity showed that the species composition similarity was primarily clustered according to the position of the BES and then according to the run time. In addition, the principal axis analysis showed that the species composition similarity of the MFC-CW was closer to that of the control sample. Both the BER and MFC-CW were significantly correlated with the voltage and SMX concentration (p < 0.01) at the same correlation level (0.25-0.5). There were 39 phyla during the entire operational period, and the top 9 were Proteobacteria, Bacteroidetes, Chloroflexi, Chlorobi, Acidobacteria, Firmicutes, Actinobacteria, Nitrospirae and Planctomysete. The potential host bacteria of the sul genes, such as Lentisphaerae, Firmicutes, Proteobacteria, and Fusobacteria in the BER and Chlorobi, Caldiserica, Nitrospirae, Actinobacteria, and Planctomycetes in the MFC-CW, were obtained using a Procrustes analysis.
• Volume:46
• Issue:无
• Translation or Not:no