sp. nov., a 1,4-dioxane-degrading bacterium.

A Gram-stain-negative bacterium, designated as YN2, that is capable of degrading 1,4-dioxane, was isolated from active sludge collected from a wastewater treatment plant in Harbin, PR China. Cells of strain YN2 were aerobic, motile, pleomorphic rods, mostly twisted, and contained the water-insoluble yellow zeaxanthin dirhamnoside. Strain YN2 grew at 10-40 °C (optimum, 30 °C), pH 5.

Adaption and Degradation Strategies of Methylotrophic 1,4-Dioxane Degrading Strain sp. YN2 Revealed by Transcriptome-Scale Analysis.

Biodegradation of 1,4-dioxane (dioxane) contamination has gained much attention for decades. In our previous work, we isolated a highly efficient dioxane degrader, sp. YN2, but the underlying mechanisms of its extraordinary degradation performance remained unresolved.

Degradation of 1,4-Dioxane by Xanthobacter sp. YN2.

1,4-Dioxane is a highly toxic and carcinogenic pollutant found worldwide in groundwater and soil environments. Several microorganisms have been isolated by their ability to grow on 1,4-dioxane; however, low 1,4-dioxane tolerance and slow degradation kinetics remain obstacles for their use in 1,4-dioxane bioremediation. We report here the isolation and characterization of a new strain, Xanthobacter sp.

[Variation of alkalinity and its regulation of ABR].

Variation of alkalinity and its relationship with the pH, volatile fatty acid (VFA) and COD along with the different compartments of the ABR were investigated. The experimental results showed that there was a close relationship between variation of alkalinity and VFA concentration along with the ABR compartments. The lowest point of alkalinity and pH value occurred where VFA concentration reached maximum.