Cold anammox process and reduced graphene oxide - Varieties of effects during long-term interaction

Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures

“…Hu et al 55 have previously shown that Ca. Brocadia is the dominant genus, as corroborated by Winkler et al 56 in a reactor operated at 18 °C, and inoculated, similarly as with our studies, with biomass from a 13,14 . Beside Ca.…”

Graphene-based nanomaterials and microbial communities: a review of their interactions, from ecotoxicology to bioprocess engineering perspectives

“…51 Increases of the anammox rate was also observed in a community exposed to 15 mg L −1 of rGO for 316 days (ref. 53) and in a reactor exposed to 25, 50, 100 and 150 mg L −1 of graphene 52 where higher relative abundances of anammox bacteria species were observed: Candidatus Brocadia and Candidatus Jettenia. Anammox relies on electron transfer and interestingly, it has been put forward the capacity of Candidatus Brocadia to use GO as an electron acceptor in the case of anaerobic oxidation of ammonium.…”

“…In addition to the aforementioned bioprocesses that are designed to remove organic matter (and recover energy through methane production in the case of anaerobic digestion), anammox reactors carrying out anaerobic ammonium oxidation were also investigated. [50][51][52][53] Among environmental compartments, soil was highly studied and represented 27% of the studies. The different types of soils studied were the following: paddy, 54 urban, 55,56 agriculture, [57][58][59][60][61][62] forest, 63 mountain 64 and grassland 65 soils.…”

“…92 The capacity of naphthalene degrading bacteria to degrade graphite, GO and rGO was previously reviewed 25 and was also observed in anammox reactors, where the oxidation of rGO was also evidenced. 53 The degradation of graphene by different microbial peroxidase enzymes was also highlighted: lignin peroxidase produced by white rot fungus 93 but also horseradish peroxidase and myeloperoxidase. 24 Furthermore, in the presence of graphene, the relative abundance of bacterial strains capable of the biodegradation of complex carbon pollutants were found to be enhanced, 34,54,64,70 suggesting that this capacity of biodegradation could also be effective on GBMs.…”

Toxic Effects of Xenobiotic Compounds on the Microbial Community of Activated Sludge

“…The bacterial community structure in SBRs could not be affected by reduced GO as bioreactor performances were improved under the exposure of GO [104]. By adding 30 mg L -1 GO, the sulfate reductive rate increasingly raised in the microbial electrolysis cell [105].…”