Journal ArticleDOI
Genus-specific and phase-dependent effects of nitrate on a sulfate-reducing bacterial community as revealed by dsrB-based DGGE analyses of wastewater reactors.
TLDR
Investigation of the inhibitory effect of nitrate on the dynamics of sulfate-reducing bacteria (SRB) community in a laboratory-scale wastewater reactor revealed that nitrate addition remarkably attenuated a distinct group of dSRB related to Desulfovibrio, whereas other dsrB groups were not influenced.Abstract:
The biogenic production of hydrogen sulfide is a serious problem associated with wastewater treatment. The aim of this study was to investigate the inhibitory effect of nitrate on the dynamics of sulfate-reducing bacteria (SRB) community in a laboratory-scale wastewater reactor, originating from a denitrifying plant using activated sludge. For this purpose, denaturing gradient gel electrophoresis (DGGE) analysis targeting the dsrB (dissimilatory sulfite reductase) gene was used in combination with chemical analyses and measurement of oxidation and reduction potential (ORP). The reactors were initially dosed with 1.0 and 4.0 g/L potassium nitrate and anaerobically incubated for 490 h. Addition of 4.0 g/L nitrate to the reactor was associated with a prolonged inhibition (over 300 h, i.e., 12.5 days) of sulfate reduction and this was consistent with a rapid decrease in ORP associated with nitrate depletion. The DGGE analysis revealed that nitrate addition remarkably attenuated a distinct group of dsrB related to Desulfovibrio, whereas other dsrB groups were not influenced. Furthermore, another sulfate reduction by Syntrophobacter in the later stages of the incubation period occurred in both reactors (regardless of the nitrate concentration), suggesting that different SRB groups are associated with sulfate reduction at different stages of the wastewater treatment process.read more
Citations
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Journal ArticleDOI
The bioenergetics mechanisms and applications of sulfate-reducing bacteria in remediation of pollutants in drainage: A review.
Xin Li,Shiming Lan,Zhu Zhongping,Chang Zhang,Guangming Zeng,Yunguo Liu,Weicheng Cao,Biao Song,Hong Yang,Shengfan Wang,Shaohua Wu +10 more
TL;DR: Progress in bioenergetics mechanisms and application of sulfate-reducing bacteria including electron acceptors and donors for SRB, pathway for sulfate reduction, application of SRB for economical and concomitant treatment of heavy metal, organic contaminants and sulfates are reviewed.
Journal ArticleDOI
Immobilizing of heavy metals in sediments contaminated by nonferrous metals smelting plant sewage with sulfate reducing bacteria and micro zero valent iron
TL;DR: In this article, a series of immobilization experiments were conducted with heavy metals contaminated aquifer sediment under three conditions: combined micro zero valent iron with sulfate reduction bacteria (mFe 0 ǫ+ǫ+, SRB, mFe 0 ) only.
Journal ArticleDOI
Function of Biohydrogen Metabolism and Related Microbial Communities in Environmental Bioremediation.
TL;DR: Recent advances in elucidating role of H2 metabolism involved in syntrophy and hydrogenases in environmental bioremediation are reviewed, with a focus on the application of bioenergy in biOREmediation to make microbiological H1 metabolism a promising remediation strategy.
Journal ArticleDOI
Microbial Character Related Sulfur Cycle under Dynamic Environmental Factors Based on the Microbial Population Analysis in Sewerage System.
TL;DR: Characterizing the distributions and proportions of critical microbial communities within sewerage systems could provide insights into how the microbial sulfur cycle is affected by the dynamic environmental conditions that exist in sewers and might be useful for explaining the potential sewerage problems.
Journal ArticleDOI
Sulfate-reducing bacteria detection based on the photocatalytic property of microbial synthesized ZnS nanoparticles.
Peng Qi,Dun Zhang,Yi Wan +2 more
TL;DR: To the best of the knowledge, this is the first example of using the photocatalytic property of microbial synthesized ZnS for bacterial detection, and showed excellent specificity for SRB detection.
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