Total and Metabolically Active Microbial Community of Aerobic Granular Sludge Systems Operated in Sequential Batch Reactors: Effect of Pharmaceutical Compounds
Metadatos
Mostrar el registro completo del ítemAutor
Muñoz Palazón, Barbara; Rosa Masegosa, Aurora; Hurtado Martínez, Miguel; González Martínez, Alejandro; González López, Jesús JuanEditorial
MDPI
Materia
Aerobic granular sludge Pharmaceutical compounds Wastewater Total microbial community Active microbial community Quantitative polymerase chain reaction (qPCR)
Fecha
2021Referencia bibliográfica
Muñoz-Palazon, B.; Rosa-Masegosa, A.; Hurtado-Martinez, M.; Rodriguez-Sanchez, A.; Link, A.; Vilchez-Vargas, R.; Gonzalez-Martinez, A.; Lopez, J.G. Total and Metabolically Active Microbial Community of Aerobic Granular Sludge Systems Operated in Sequential Batch Reactors: Effect of Pharmaceutical Compounds. Toxics 2021, 9, 93. https://doi.org/10.3390/ toxics9050093
Resumen
Two aerobic granular sludge (AGS) sequential batch reactors were operated at a mild (15 ◦C)
temperature for 180 days. One of those bioreactors was exposed to a mixture of diclofenac, naproxen,
trimethoprim, and carbamazepine. The AGS system, operating under pressure from emerging
contaminants, showed a decrease in COD, BOD5
, and TN removal capacity, mainly observed during
the first 100 days, in comparison with the removal ratios detected in the control bioreactor. After an
acclimatisation period, the removal reached high-quality effluent for COD and TN, close to 95% and
90%, respectively. In the steady-state period, trimethoprim and diclofenac were successfully removed
with values around 50%, while carbamazepine and naproxen were more recalcitrant. The dominant
bacterial OTUs were affected by the presence of a mixture of pharmaceutical compounds, under
which the dominant phylotypes changed to OTUs classified among the Pseudomonas, Gemmobacter,
and Comamonadaceae. The RT-qPCR and qPCR results showed the deep effects of pharmaceutical
compounds on the number of copies of target genes. Statistical analyses allowed for linking the total
and active microbial communities with the physico-chemical performance, describing the effects
of pharmaceutical compounds in pollution degradation, as well as the successful adaptation of the
system to treat wastewater in the presence of toxic compounds.