Influence of salinity cycles in bioreactor performance and microbial community structure of membrane-based tidal-like variable salinity wastewater treatment systems

Salinity is the major driver of the global eukaryotic community structure in fish-canning wastewater treatment plants

“…Similarly, other studies showed that salinity was a driving factor for the shaping of the eukaryotic community in different aquatic ecosystems (Rojas-Jiménez et al, 2019). On the other hand, although several authors highlighted the negative effect of NaCl on the abundance of different phylum-like clades (Horikoshi et al, 2010;Cortés-Lorenzo et al, 2016;Rodríguez-Sánchez et al, 2019), strikingly, no strong negative correlations were observed in this work (Fig. 7, Table S4).…”

“…In this sense, the changes in salinity resulted in a modulation of the RAs of the different phylum-like clades rather than a change in the phyla that formed the eukaryotic community (Table 3 and 4). Recently, Rodríguez-Sánchez et al (2019) reported that community structures of Eukarya were affected by the salinity level more than by other factors and were more responsive to its changes than the prokaryotic communities in two hybrid moving-bed pilot scale bioreactors and a membrane bioreactor treating urban WW. Similarly, other studies showed that salinity was a driving factor for the shaping of the eukaryotic community in different aquatic ecosystems (Rojas-Jiménez et al, 2019).…”

Effect of variable salinity wastewater on performance and kinetics of membrane‐based bioreactors

“…Differences observed between the MBR and hybrid MBBR‐MBR systems with respect to removal performance observed at different salinity scenarios could be caused by the differences in the microbial communities under the different operational conditions. The analysis of the microbial communities in MBR and hybrid MBBR‐MBR systems treating variable salinity wastewater at 4.5 mS cm −1 and 8.5 mS cm −1 maximum salinities showed that maximum influent salinity greatly shaped the Prokarya communities . Following Tan et al ., the differences between the two salinity scenarios could be derived by selection of salt‐sensitive species at lower salinity levels but selection of halotolerant species at higher salinity levels.…”

“…The analysis of the microbial communities in MBR and hybrid MBBR-MBR systems treating variable salinity wastewater at 4.5 mS cm −1 and 8.5 mS cm −1 maximum salinities showed that maximum influent salinity greatly shaped the Prokarya communities. 34 Following Tan et al, 35 the differences between the two salinity scenarios could be derived by selection of salt-sensitive species at lower salinity levels but selection of halotolerant species at higher salinity levels. According to the results obtained in this research, it has been found that increasing salinity led to decreasing biodegradability of ammonium.…”