A biological process for the reclamation of flue gas desulfurization gypsum using mixed sulfate-reducing bacteria with inexpensive carbon sources

1997 ◽  
Vol 63-65 (1) ◽  
pp. 677-693 ◽  
Author(s):  
Eric N. Kaufman ◽  
Mark H. Little ◽  
Punjaii Selvaraj
Keyword(s):  
Flue Gas ◽  
Biological Process ◽  
Carbon Sources ◽  
Sulfate Reducing Bacteria ◽  
Flue Gas Desulfurization ◽  
Sulfate Reducing ◽  
Reducing Bacteria

scholarly journals Simultaneous Biological and Chemical Removal of Sulfate and Fe(II)EDTA-NO in Anaerobic Conditions and Regulation of Sulfate Reduction Products

Minerals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 330 ◽  
Author(s):  
Yu Zhang ◽  
Lijian Sun ◽  
Jiti Zhou
Keyword(s):  
Sulfate Reduction ◽  
Flue Gas ◽  
Elemental Sulfur ◽  
Biofilm Reactor ◽  
Flue Gas Desulfurization ◽  
Moving Bed Biofilm Reactor ◽  
Anaerobic Conditions ◽  
Biological Reduction ◽  
Sulfate Reducing ◽  
Reducing Bacteria

In the simultaneous flue gas desulfurization and denitrification by biological combined with chelating absorption technology, SO2 and NO are converted into sulfate and Fe(II)EDTA-NO which need to be reduced in biological reactor. Increasing the removal loads of sulfate and Fe(II)EDTA-NO and converting sulfate to elemental sulfur will benefit the application of this process. A moving-bed biofilm reactor was adopted for sulfate and Fe(II)EDTA-NO biological reduction. The removal efficiencies of the sulfate and Fe(II)EDTA-NO were 96% and 92% with the influent loads of 2.88 kg SO42−·m−3·d−1 and 0.48 kg NO·m−3·d−1. The sulfide produced by sulfate reduction could be reduced by increasing the concentrations of Fe(II)EDTA-NO and Fe(III)EDTA. The main reduction products of sulfate and Fe(II)EDTA-NO were elemental sulfur and N2. It was found that the dominant strain of sulfate reducing bacteria in the system was Desulfomicrobium. Pseudomonas, Sulfurovum and Arcobacter were involved in the reduction of Fe(II)EDTA-NO.

Effective Removal of Lead from Solution by Sulfate Reducing Bacteria Cultured with Sugar Byproducts

2020 ◽  
Vol 14 (3) ◽  
pp. 384-395
Author(s):  
Juan Yin ◽  
Chao-Bing Deng ◽  
Hongxiang Zhu ◽  
Jianhua Xiong ◽  
Zhuo Sun
Keyword(s):  
High Efficiency ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Carbon Sources ◽  
Sulfate Reducing Bacteria ◽  
Lead Removal ◽  
Sulfate Reducing ◽  
Reducing Bacteria ◽  
Filter Mud

Sulfate reducing bacteria (SRB) are widely used to remove heavy metals because of their high efficiency. However, the metabolic processes of SRB require additional carbon sources, and the development of low-cost carbon sources has gradually attracted attention. The utilization of sugar byproduct resources, as the low-cost carbon sources, has great practical significance for environmentally sustainable development in Guangxi, China. This study aims to cultivate SRB with low-cost sugar byproducts, apply them to controlling a lead-polluted environment, and study the effects and mechanisms of controlling lead pollution. The research results show that the best culture effect of SBR can be obtained by mixing the filter mud and vinasse in a ratio of 1:1 to 3:1. SRB have average lead removal rates of more than 96.97% in solutions with different lead concentration of 10∼100 mg/L, and SRB have a higher tolerance to high concentrations of lead due to factors such as the organic substance composition of sugar byproducts and the porosity of filter mud. Scanning electron microscopy combined with energy dispersive spectrometry and X-ray diffraction analysis show that SRB mainly cause Pb2+ to form PbS precipitate through redox reactions to remove lead from the solution. Therefore, low-cost filters of a mud and vinasse mixture can be used as a medium for SRB and exhibit high heavy metal removal efficiency, thus providing a new utilization of filter mud and vinasse.

Sulfur isotope fractionation during growth of sulfate-reducing bacteria on various carbon sources

2004 ◽  
Vol 68 (23) ◽  
pp. 4891-4904 ◽  
Author(s):  
Jutta Kleikemper ◽  
Martin H. Schroth ◽  
Stefano M. Bernasconi ◽  
Benjamin Brunner ◽  
Josef Zeyer
Keyword(s):  
Isotope Fractionation ◽  
Sulfur Isotope ◽  
Carbon Sources ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Sulfur Isotope Fractionation ◽  
Reducing Bacteria

scholarly journals Activity and Diversity of Sulfate-Reducing Bacteria in a Petroleum Hydrocarbon-Contaminated Aquifer

2002 ◽  
Vol 68 (4) ◽  
pp. 1516-1523 ◽  
Author(s):  
Jutta Kleikemper ◽  
Martin H. Schroth ◽  
William V. Sigler ◽  
Martina Schmucki ◽  
Stefano M. Bernasconi ◽  
...  
Keyword(s):  
Carbon Source ◽  
Sulfate Reduction ◽  
Petroleum Hydrocarbon ◽  
Carbon Sources ◽  
Sulfate Reducing Bacteria ◽  
Rate Coefficients ◽  
Contaminated Aquifer ◽  
Sulfate Reducing ◽  
Pull Tests ◽  
Reducing Bacteria

ABSTRACT Microbial sulfate reduction is an important metabolic activity in petroleum hydrocarbon (PHC)-contaminated aquifers. We quantified carbon source-enhanced microbial SO4 2− reduction in a PHC-contaminated aquifer by using single-well push-pull tests and related the consumption of sulfate and added carbon sources to the presence of certain genera of sulfate-reducing bacteria (SRB). We also used molecular methods to assess suspended SRB diversity. In four consecutive tests, we injected anoxic test solutions (1,000 liters) containing bromide as a conservative tracer, sulfate, and either propionate, butyrate, lactate, or acetate as reactants into an existing monitoring well. After an initial incubation period, 1,000 liters of test solution-groundwater mixture was extracted from the same well. Average total test duration was 71 h. We measured concentrations of bromide, sulfate, and carbon sources in native groundwater as well as in injection and extraction phase samples and characterized the SRB population by using fluorescence in situ hybridization (FISH) and denaturing gradient gel electrophoresis (DGGE). Enhanced sulfate reduction concomitant with carbon source degradation was observed in all tests. Computed first-order rate coefficients ranged from 0.19 to 0.32 day−1 for sulfate reduction and from 0.13 to 0.60 day−1 for carbon source degradation. Sulfur isotope fractionation in unconsumed sulfate indicated that sulfate reduction was microbially mediated. Enhancement of sulfate reduction due to carbon source additions in all tests and variability of rate coefficients suggested the presence of specific SRB genera and a high diversity of SRB. We confirmed this by using FISH and DGGE. A large fraction of suspended bacteria hybridized with SRB-targeting probes SRB385 plus SRB385-Db (11 to 24% of total cells). FISH results showed that the activity of these bacteria was enhanced by addition of sulfate and carbon sources during push-pull tests. However, DGGE profiles indicated that the bacterial community structure of the dominant species did not change during the tests. Thus, the combination of push-pull tests with molecular methods provided valuable insights into microbial processes, activities, and diversity in the sulfate-reducing zone of a PHC-contaminated aquifer.

Treatment, Electricity Harvesting and Sulfur Recovery from Flue Gas Pre-Treatment Wastewater Using Microbial Fuel Cells with Sulfate Reduction Bacterial

2014 ◽  
Vol 1073-1076 ◽  
pp. 920-923
Author(s):  
Mei Yao Yin ◽  
Xiao Juan Zhao ◽  
Chen Guang Li ◽  
Hong Da Cui ◽  
Juan Wang
Keyword(s):  
Fuel Cells ◽  
Flue Gas ◽  
Microbial Fuel Cells ◽  
Flue Gas Desulfurization ◽  
Carbon Cloth ◽  
Sulfur Recovery ◽  
Sulfate Reducing ◽  
Maximum Current ◽  
Pre Treatment ◽  
Reducing Bacteria

Aiming at the problem of the traditional flue gas desulfurization and effluent disposal, two identical dual-chambered Microbial fuel cells (MFCs) are designed to remove man-made flue gas pre-treatment wastewater (FGPW). Glucose is used as the carbon source of the Sulfate reducing bacteria (SRB). Carbon cloth is used as the material of anodic and cathode. The treatment performance of flue gas pre-treatment wastewater and the possibility of electricity harvesting and sulfur recovery were investigated. The results show that the output voltage is 0.68-0.72V and the maximum current density is 28.12mA/m2 at pH=7.520. The concentration of sulfate measured with ion chromatography is decreased gradually during the operation of MFC. The elemental sulfur is found in carbon cloth (taken from the MFC after working for 58 days) by analysis with XPS. The results suggest that treatment of flue gas pre-treatment wastewater and electricity harvesting and sulfur recovery by MFC is technical feasibility.

scholarly journals Sulfur Metabolites Play Key System-Level Roles in Modulating Denitrification

mSystems ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Anne E. Otwell ◽  
Alex V. Carr ◽  
Erica L. W. Majumder ◽  
Maryann K. Ruiz ◽  
Regina L. Wilpiszeski ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Carbon Sources ◽  
Sulfate Reducing Bacteria ◽  
System Level ◽  
Toxic Heavy Metals ◽  
Reduced Sulfur Compounds ◽  
Sulfate Reducing ◽  
Anoxic Environments ◽  
Reducing Bacteria ◽  
Nitrate Reducing Bacteria

ABSTRACT Competition between nitrate-reducing bacteria (NRB) and sulfate-reducing bacteria (SRB) for resources in anoxic environments is generally thought to be governed largely by thermodynamics. It is now recognized that intermediates of nitrogen and sulfur cycling (e.g., hydrogen sulfide, nitrite, etc.) can also directly impact NRB and SRB activities in freshwater, wastewater, and sediment and therefore may play important roles in competitive interactions. Here, through comparative transcriptomic and metabolomic analyses, we have uncovered mechanisms of hydrogen sulfide- and cysteine-mediated inhibition of nitrate respiratory growth for the NRB Intrasporangium calvum C5. Specifically, the systems analysis predicted that cysteine and hydrogen sulfide inhibit growth of I. calvum C5 by disrupting distinct steps across multiple pathways, including branched-chain amino acid (BCAA) biosynthesis, utilization of specific carbon sources, and cofactor metabolism. We have validated these predictions by demonstrating that complementation with BCAAs and specific carbon sources relieves the growth inhibitory effects of cysteine and hydrogen sulfide. We discuss how these mechanistic insights give new context to the interplay and stratification of NRB and SRB in diverse environments. IMPORTANCE Nitrate-reducing bacteria (NRB) and sulfate-reducing bacteria (SRB) colonize diverse anoxic environments, including soil subsurface, groundwater, and wastewater. NRB and SRB compete for resources, and their interplay has major implications on the global cycling of nitrogen and sulfur species, with undesirable outcomes in some contexts. For instance, the removal of reactive nitrogen species by NRB is desirable for wastewater treatment, but in agricultural soils, NRB can drive the conversion of nitrates from fertilizers into nitrous oxide, a potent greenhouse gas. Similarly, the hydrogen sulfide produced by SRB can help sequester and immobilize toxic heavy metals but is undesirable in oil wells where competition between SRB and NRB has been exploited to suppress hydrogen sulfide production. By characterizing how reduced sulfur compounds inhibit growth and activity of NRB, we have gained systems-level and mechanistic insight into the interplay of these two important groups of organisms and drivers of their stratification in diverse environments.

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