Response of sulfate-reducing bacteria and supporting microbial community to persulfate exposure in a continuous flow system

2019 ◽  
Vol 21 (7) ◽  
pp. 1193-1203 ◽  
Author(s):  
Christopher K. Bartlett ◽  
Robin M. Slawson ◽  
Neil R. Thomson
Keyword(s):  
Microbial Community ◽  
Continuous Flow ◽  
Flow System ◽  
Sulfate Reducing Bacteria ◽  
Continuous Flow System ◽  
Sulfate Reducing ◽  
System P ◽  
P Recovery ◽  
Community Profile ◽  
Reducing Bacteria

Recovery of BTEX biodegradation, sulfate-reducing bacteria and associated community profile following exposure to persulfate in a continuous flow system.

scholarly journals Gel permeation chromatography as a multifunctional processor for nanocrystal purification and on-column ligand exchange chemistry

2016 ◽  
Vol 7 (9) ◽  
pp. 5671-5679 ◽  
Author(s):  
Yi Shen ◽  
Adam Roberge ◽  
Rui Tan ◽  
Megan Y. Gee ◽  
Dylan C. Gary ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Continuous Flow ◽  
Flow System ◽  
Gel Permeation Chromatography ◽  
Continuous Flow System ◽  
System P ◽  
Gel Permeation

GPC provides a general approach to purification of a variety of nanocrystal types, and additionally achieves ligand exchange in a continuous flow system.

Sulfate-reducing bacteria in the microbial community of acidic drainage from a gold deposit tailing storage

Microbiology ◽  
2017 ◽  
Vol 86 (2) ◽  
pp. 286-288 ◽  
Author(s):  
A. V. Mardanov ◽  
A. V. Beletskii ◽  
D. A. Ivasenko ◽  
N. V. Pimenov ◽  
O. V. Karnachuk ◽  
...  
Keyword(s):  
Microbial Community ◽  
Gold Deposit ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Reducing Bacteria

scholarly journals CHARACTERIZATION OF SULFATE REDUCING BACTERIA FROM BIOFILM SULFATE REDUCTION AND CU PRECIPITATION BIOREACTOR (BATCH CULTURE).

2018 ◽  
Vol 2 (2) ◽  
pp. 1
Author(s):  
Tyas Nyonita Punjungsari
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Sulfate Reduction ◽  
Batch Culture ◽  
Microbial Community Structure ◽  
Sulfate Reducing Bacteria ◽  
Zeolite Surface ◽  
Sulfate Reducing ◽  
Reducing Bacteria

The biofilm is a microbial community structure formed on the zeolite surface in a sulfate reduction bioreactor and Cu deposition using a SRB consortium . The biofilm soluble microbial solvent is expected to have the capability in sulfate reduction and Cu deposition. Characterization of isolates is required for the optimization of pure culture . The aim of this study is to isolate and characterize the biofilm sulfate reducing bacteria in the sulfate reduction bioreactor and the precipitation of Cu in Batch Culture by a consortium of Sulfate Reducing Bacteria. The method used in this study cultivation was done by using postgate B medium, isolation was done by diluting biofilm on NaCl salt, bacteria grown on NB and postgate B media, characterization done by morphology and biochemistry. There were 3 isolates of B1 (Metylobacterium ), B3 ( Desulfucoccus ), and B2 ( Desulfobacter ). B3 ( Desulfococcus) has the best ability to reduce sulfate and Cu precipitation.Keywords : Sulfur Reducing Bacteria (SRB), Biofilm, Sulfate, Cu. Received: 26 August, 2017; Accepter: 10 September, 2017 

scholarly journals p-Xylene from 2,5-dimethylfuran and acrylic acid using zeolite in a continuous flow system

2020 ◽  
Vol 22 (21) ◽  
pp. 7398-7405 ◽  
Author(s):  
Jose Alirio Mendoza Mesa ◽  
Francesco Brandi ◽  
Irina Shekova ◽  
Markus Antonietti ◽  
Majd Al-Naji
Keyword(s):  
Acrylic Acid ◽  
Lignocellulosic Biomass ◽  
Continuous Flow ◽  
Flow System ◽  
Diels Alder ◽  
Flow Synthesis ◽  
Continuous Flow System ◽  
System P ◽  
Different Types

The continuous flow synthesis of p-xylene (pXL) via Diels–Alder cycloaddition of lignocellulosic biomass-derivable 2,5-dimethylfuran (DMF) and acrylic acid (AA) was performed over different types of zeolites.

Glycopolymer monoliths for affinity bioseparation of proteins in a continuous-flow system: glycomonoliths

2017 ◽  
Vol 5 (6) ◽  
pp. 1148-1154 ◽  
Author(s):  
Hirokazu Seto ◽  
Makoto Shibuya ◽  
Hikaru Matsumoto ◽  
Yu Hoshino ◽  
Yoshiko Miura
Keyword(s):  
Continuous Flow ◽  
Flow System ◽  
Continuous Flow System ◽  
System P ◽  
Macroporous Materials

Macroporous materials, called glycomonoliths, were prepared from saccharide-containing monomers, and applied for affinity bioseparation of proteins in a continuous-flow system.

scholarly journals Detection of sulfate-reducing bacteria as an indicator for successful mitigation of sulfide production

2021 ◽  
Author(s):  
Avishek Dutta ◽  
Fernando Valle ◽  
Thomas Goldman ◽  
Jeff Keating ◽  
Ellen Burke ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Critical Time ◽  
Sulfate Reducing Bacteria ◽  
Time Points ◽  
Sulfate Reducing ◽  
Nitrate Treatment ◽  
Reducing Bacteria ◽  
Planktonic Community

Sulfate-reducing bacteria (SRB) are one of the main sources of biogenic H 2 S generation in oil reservoirs. Excess H 2 S production in these systems leads to oil biosouring, which causes operational risks, health hazards and can increase the cost of refining crude oil. Nitrate salts are often added to the system to suppress sulfidogenesis. Because SRB populations can persist in biofilms even after nitrate treatment, identifying shifts in the sessile community is crucial for successful mitigation. However, sampling the sessile community is hampered by its inaccessibility. Here we use the results of a long-term (148 days) ex situ experiment to identify particular sessile community members from observations of the sample waste stream. Microbial community structure was determined for 731 samples across twenty bioreactors using 16S rRNA gene sequencing. By associating microbial community structure with specific steps in the mitigation process, we could distinguish between taxa associated with H 2 S production and mitigation. After initiation of nitrate treatment, certain SRB populations increased in the planktonic community during critical time points, indicating the dissociation of SRBs from the biofilm. Predicted relative abundances of the dissimilatory sulfate reduction pathway also increased during the critical time points. Here, by analyzing the planktonic community structure, we describe a general method that uses high-throughput amplicon sequencing, metabolic inferences, and cell abundance data to identify successful biofilm mitigation. We anticipate that our approach is also applicable to other systems where biofilms must be mitigated but cannot be easily sampled. Importance Microbial biofilms are commonly present in many industrial processes and can negatively impact performance and safety. Within the oil industry, subterranean biofilms cause biosouring with implications for oil quality, cost, occupational health, and the environment. Because these biofilms cannot be directly sampled, methods are needed to indirectly assess the success of mitigation measures. This study demonstrates how the planktonic microbial community can be used to assess the dissociation of SRB-containing biofilms. We found that an increase in the abundance of a specific SRB population in the effluent after nitrate treatment can be used as a potential indicator for the successful mitigation of biofilm-forming SRBs. Moreover, a method for determining critical time points for detecting potential indicators is suggested. This study expands our knowledge in improving mitigation strategies for biosouring and could have broader implications in other systems where biofilms lead to adverse consequences.

scholarly journals Methane-related changes in prokaryotes along geochemical profiles in sediments of Lake Kinneret (Israel)

2015 ◽  
Vol 12 (10) ◽  
pp. 2847-2860 ◽  
Author(s):  
I. Bar-Or ◽  
E. Ben-Dov ◽  
A. Kushmaro ◽  
W. Eckert ◽  
O. Sivan
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Methane Oxidation ◽  
Microbial Community Structure ◽  
Iron Reduction ◽  
Sulfate Reducing Bacteria ◽  
Lake Kinneret ◽  
Anaerobic Oxidation Of Methane ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Abstract. Microbial methane oxidation is the primary control on the emission of the greenhouse gas methane into the atmosphere. In terrestrial environments, aerobic methanotrophic bacteria are largely responsible for this process. In marine sediments, a coupling of anaerobic oxidation of methane (AOM) with sulfate reduction, often carried out by a consortium of anaerobic methanotrophic archaea (ANME) and sulfate-reducing bacteria, consumes almost all methane produced within those sediments. Motivated by recent evidence for AOM with iron(III) in Lake Kinneret sediments, the goal of the present study was to link the geochemical gradients in the lake porewater to the microbial community structure. Screening of archaeal 16S rRNA gene sequences revealed a shift from hydrogenotrophic to acetoclastic methanogens with depth. The observed changes in microbial community structure suggest possible direct and indirect mechanisms for the AOM coupled to iron reduction in deep sediments. The percentage of members of the Nitrospirales order increased with depth, suggesting their involvement in iron reduction together with Geobacter genus and "reverse methanogenesis". An indirect mechanism through sulfate and ANME seems less probable due to the absence of ANME sequences. This is despite the abundant sequences related to sulfate-reducing bacteria (Deltaproteobacteria) together with the occurrence of dsrA in the deep sediment that could indicate the production of sulfate (disproportionation) from S0 for sulfate-driven AOM. The presence of the functional gene pmoA in the deep anoxic sediment together with sequences related to Methylococcales suggests the existence of a second unexpected indirect pathway – aerobic methane oxidation pathway in an anaerobic environment.

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