Simultaneous bisphenol F degradation, heterotrophic nitrification and aerobic denitrification by a bacterial consortium

Abstract

BACKGROUND Traditional aerobic autotrophic nitrification and anoxic heterotrophic denitrification have many limitations. Recently, the simultaneous heterotrophic nitrification–aerobic denitrification (HN‐AD) process has received increasing attention. Thus, the possibility of the simultaneous removal of bisphenols and NH4+‐N via HN‐AD was investigated. RESULTS A bisphenols‐degrading bacterial consortium was enriched and capable of degrading 50 mg L−1 bisphenol A, 300 mg L−1 4,4‐dihydroxybenzophenone, 375 mg L−1 bisphenol F (BPF) and 10 mg L−1 bis(4‐hydroxyphenyl)sulfide under aerobic conditions. Further studies showed that the bacterial consortium could completely degrade 300 mg L−1 BPF and remove NH4+‐N at 35 °C with 150 rpm at the C/N ratio of over 10. Moreover, BPF mineralization and NH4+‐N reduction to N2 were observed. Clone library analysis indicated that Salmonella enterica, Enterobacter,Citrobacter and Pseudomonas could cooperate to degrade BPF and reduce NH4+‐N to N2. Among these species, the isolated Pseudomonas sp. HS‐2 was capable of simultaneous BPF degradation and NH4+‐N removal via HN‐AD. CONCLUSION The experimental results demonstrated that the enriched bacterial consortium and the isolated strain HS‐2 could simultaneously remove BPF and NH4+‐N via HN‐AD, indicating that this is a potential way for the treatment of wastewaters containing these compounds. © 2016 Society of Chemical Industry

Role of Gastrointestinal Microbiota from Crucian Carp in Microbial Transformation and Estrogenicity Modification of Novel Plastic Additives

“…Overall, the genes involved in xenobiotic degradation processes were all of bacterial origin based on the functional gene assignments, which are mainly located in the genera of Citrobacter , Klebsiella , and some unclassified genera in Enterobacteriaceae . Especially, for O 2 -independent peripheral pathways, the Citrobacter genus predominantly contributed to metabolic pathways of “Degradation of aromatic compounds” and “PAH degradation”, which might share similar transformation mechanisms with the selected plastic additives in this study. , Citrobacter could participate in the rapid degradation of bisphenols (e.g., BPA and BPF), − organophosphates, − and BFRs , as core member of bacterial consortia. Klebsiella exhibited high activities of organophosphates hydrolase, dehalogenase and ligninolytic enzymes. − Enterobacteriaceae also share similar transformation mechanisms to the selected plastic additives (i.e., bisphenols, ,− organophosphates, and BFRs , ).…”

Bacterial degradation of bisphenol analogues: an overview

“…Pseudomonas is known for its ability to degrade a variety of organic molecules, including aromatic compounds like toluene, biphenyl, naphthalene, phthalates, and others (Díaz et 2017) identi ed a consortium with Pseudomonas that degraded BPF. Moreover, when the strain Pseudomonas sp HS-2 was isolated from this consortia, it was still e cient in BPF degradation (Lu et al 2017).…”

“…Chang et al 2011; Kang and Kondo 2002b; Peng et al 2015; Sakai et al 2007; Sarma et al 2019;Yu et al 2019). However, only two studies evaluated the consortium degradation of an analogue different from BPA(Lu et al 2017;Wang et al 2019b). Thereby, bacterial degradation e ciency varies greatly depending on the microorganisms involved in the process, the environmental conditions, and the chemical structure of the compound to be degraded.…”

Kinetic characteristics and N2O production of a heterotrophic nitrifying bacterium Pseudomonas putida YH capable of tolerating adverse environmental conditions

“…Recently, studies on HNB have been focused primarily on heterotrophic nitrification‐aerobic denitrification (HNAD) capability, optimization of environmental conditions and metabolic pathways . However, scant literature is available on the kinetic analysis of HNB, which severely restricts the description and prediction of HNAD performance.…”

“…[13][14][15] Recently, studies on HNB have been focused primarily on heterotrophic nitrification-aerobic denitrification (HNAD) capability, optimization of environmental conditions and metabolic pathways. 11,[16][17][18] However, scant literature is available on the kinetic analysis of HNB, which severely restricts the description and prediction of HNAD performance. At present, most kinetic models are applied mainly in activated sludge, and these models cannot accurately describe the kinetic characteristics of the HNAD process.…”