Simultaneous removal of SO2 and NO in a rotating drum biofilter coupled with complexing absorption by FeII(EDTA)

Gu, Siyang; Ji, Zheng; Chen, Jianmeng

doi:10.1016/j.bej.2016.06.027

Cited by 28 publications

(17 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other studies have shown that N 2 O accumulation was inhibited with a high C/N ratio, sufficient electron donor and a low sulfite concentration [45]. However, N 2 as the final product of Fe(II)EDTA-NO reduction was recognized by most researchers [7][8][9][10][11]13,20,35,37,38,[45][46][47].…”

Section: Analysis Of Reduction Products Of Fe(ii)edta-nomentioning

confidence: 99%

“…Hydrogen sulfide and ferrous sulfide may be produced with the increase of sulfide concentration in the reactor. Chen et al found that many sulfides produced by sulfate reduction existed in the form of hydrogen sulfide in simultaneous removal of SO 2 and NO in a rotating drum biofilter [9,10]. Both Zhou et al [26] and Xia et al [27] observed the formation of FeS in the sulfate reduction system containing ferric iron.…”

Section: Simultaneous Biological and Chemical Removal Of Sulfate And mentioning

confidence: 99%

“…Chen et al studied the simultaneous removal of NO and SO 2 by rotating drum biofilter coupled with Fe(II)EDTA. Their results showed that sulfide produced by sulfate reduction could be converted into elemental sulfur by sulfur autotrophic denitrification and the sulfide was emitted in the form of hydrogen sulfide at low NO concentration [9,10]. They recommend the sulfur autotrophic denitrification reaction as shown in Equation (7).…”

Section: Analysis Of S Element Equilibriummentioning

confidence: 99%

“…The combination of Bio-FGD and BioDeNOx technology may be a promising simultaneous flue gas desulfurization and denitrification technology. Simultaneous removal of SO 2 and NO in a rotating drum biofilter coupled with complexing absorption by Fe(II)EDTA has been reported [9,10]. These experiments studied the absorption and biotransformation of sulfur dioxide and nitric oxide in biofilters.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Sun

2019

Minerals

View full text Add to dashboard Cite

In the simultaneous flue gas desulfurization and denitrification by biological combined with chelating absorption technology, SO 2 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 SO 4 2− ·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 N 2 . 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.

show abstract

Section: Analysis Of Reduction Products Of Fe(ii)edta-nomentioning

confidence: 99%

Section: Simultaneous Biological and Chemical Removal Of Sulfate And mentioning

confidence: 99%

Section: Analysis Of S Element Equilibriummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Sun

2019

Minerals

View full text Add to dashboard Cite

show abstract

“…Wu et al employed Fe II EDTA combined with Na 2 SO 3 solution to remove NO and SO 2 from simulated flue gas, and found that SO 3 2− improved NO removal. Chen et al carried out the simultaneous removal of SO 2 and NO by Fe II EDTA with the denitrifying bacteria Pseudomonas and sulfate‐reducing bacteria Desulfovibrio in a rotating drum biofilter, in which the maximal removal efficiency of SO 2 and NO was 98.5% and 93%, respectively. In addition, other regenerating agents such as urea, ammonia and iron have been reported to be mixed with Fe II EDTA for simultaneous removal of SO 2 and NO.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Zhu

Chen

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND The SO2 and NO emitted from coal‐fired power plants have caused serious air pollution in China. FeIIEDTA complexation technology is one of the most promising processes to realize the simultaneous removal of SO2 and NO. However, FeIIEDTA is easily oxidized to FeIIIEDTA, causing loss of activity, which limits its further application. To solve this problem, sodium dithionite (SD) combined with FeIIEDTA was used for the simultaneous removal of SO2 and NO. RESULTS Results showed that the SO2 removal efficiencies were ≈92–99% in all experiments, whereas the NO removal fluctuated substantially under different operating conditions. Specifically, SD can markedly improve NO removal efficiency, and the optimal FeIIEDTA:SD ratio was 3 mmol L–1:0.026 mol L–1. With increasing temperature, pH value, SO2 concentration or O2 concentration, the NO removal efficiency increased first and then decreased. As the NO concentration increased, the NO removal efficiency continually decreased. Finally, based on the analysis of different ion concentrations, the main products were identified as sulfite, sulfate, ammonium, nitrite and nitrate. CONCLUSION The synergistic mechanism of SD and FeIIEDTA on SO2 and NO was investigated. SD can regenerate FeIIEDTA solution by reducing FeIIIEDTA and FeIIEDTA‐NO. These fundamental findings can offer valuable guidance for industrial denitrification and desulfurization by mixed FeIIEDTA and SD systems. © 2019 Society of Chemical Industry

show abstract

Thermodynamic and kinetic performance of an S₂O₈^2‐/CaO₂ solution for NO removal

2019

View full text Add to dashboard Cite

The thermodynamic and kinetic performance of the oxidative absorbent S2O82‐/CaO2 for NO removal was evaluated. The results indicated that the optimal molar ratio of Na2S2O8/CaO2 was 0.1:0.2 mol/mol. The experimental results showed that the combination of Na2S2O8 and CaO2 had a positive synergistic effect on the NO removal. The results of the thermodynamic calculation verified that the use of the oxidative absorbent S2O82‐/CaO2 was effective for NO removal. The results of the kinetic study showed that the NO reaction was a 1.1‐order equation and the average activation energy of the reaction was 53.0 kJ/mol. The oxidative absorbent S2O82‐/CaO2 shows potential for the simultaneous wet removal of NO and SO2 with high efficiency, no secondary pollution, and low cost.

show abstract

Simultaneous removal of SO2 and NO in a rotating drum biofilter coupled with complexing absorption by FeII(EDTA)

Cited by 28 publications

References 36 publications

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

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

Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Thermodynamic and kinetic performance of an S₂O₈^2‐/CaO₂ solution for NO removal

Contact Info

Product

Resources

About

Simultaneous removal of SO2 and NO in a rotating drum biofilter coupled with complexing absorption by FeII(EDTA)

Cited by 28 publications

References 36 publications

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

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

Simultaneous removal of NO and SO2 from flue gas by FeIIEDTA/sodium dithionite solutions

Thermodynamic and kinetic performance of an S2O82‐/CaO2 solution for NO removal

Contact Info

Product

Resources

About

Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Thermodynamic and kinetic performance of an S₂O₈^2‐/CaO₂ solution for NO removal