The Co-occurrence of DNRA and Anammox during the anaerobic degradation of benzene under denitrification

Degradation of benzene present in wastewater using hydrodynamic cavitation in combination with air

“…Benzene has a significant ability to remain in the environment due to the strong chemical stability. Benzene, being toxic compound, causes many hazardous health effects such as cancer of blood forming organs, skin irritation, and redness, defects in the immune system which increases infection chances [3] , [4] , [5] etc. Considering the high chances of occurrence and hazardous effects, it is important to develop an efficient approach for the complete removal of benzene.…”

Structure and functional capacity of a benzene-mineralizing, nitrate-reducing microbial community

“…In the microcosms, benzene degradation was coupled to nitrate reduction to nitrite and release of CO 2 while exogenous ammonium was supplied in the medium, thereby providing favourable conditions for anammox bacteria to thrive. Enrichment of anammox bacteria has previously been observed in nitrate-reducing benzene-degrading cultures (Atashgahi et al, 2018;Han et al, 2020;Luo et al, 2014;Melkonian et al, 2021;Peng et al, 2017) and also a nitrate-reducing cyclohexanedegrading enrichment culture (Musat et al, 2010), and some of these studies revealed that the presence of anammox bacteria can increase nitrate-dependent benzene degradation rates indicating anammox bacteria might detoxify nitrite (Han et al, 2020;Peng et al, 2017). Yang et al (2019) established that nitrite is a common substrate of anammox and denitrification processes, which affects nitrogen removal performance.…”

“…Syntrophic interactions and diverse metabolic processes in benzene-degrading enrichment cultures have been commonly described (Rakoczy et al, 2011;van der Zaan et al, 2012). Recently, it was revealed that anaerobic ammonium oxidation (anammox) by organisms affiliated to Candidatus Brocadia fulgida and Candidatus Kuenenia accelerated benzene degradation under nitrate-reducing conditions (Han et al, 2020;Peng et al, 2017).…”

Investigation of Dissimilatory Nitrate Reduction to Ammonium (DNRA) Microbial Communities in Sediments of Urban River Network Along the Huangpu River, china

“…Besides, researchers found that Bacteroidetes and Ignavibacteriae could be employed to detect nrfA proteins in the sediments of the Yellow River estuary and wetland, respectively (Bu et al, 2017;Zhao et al, 2020). Ignavibacteriae has been found in both natural environments and arti cial wastewater treatment systems and is known to be involved in the N cycle and the degradation of aromatic substances (Bu et al, 2017;Han et al, 2020). Moreover, during anaerobic benzene degradation, the presence of Ignavibacteriae is associated with DNRA (Han et al, 2020).…”

“…Ignavibacteriae has been found in both natural environments and arti cial wastewater treatment systems and is known to be involved in the N cycle and the degradation of aromatic substances (Bu et al, 2017;Han et al, 2020). Moreover, during anaerobic benzene degradation, the presence of Ignavibacteriae is associated with DNRA (Han et al, 2020).…”