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Conference Paper: Reuse of an aerobically treated wastewater effluent for the removal of SO2 in the flue gas

TitleReuse of an aerobically treated wastewater effluent for the removal of SO2 in the flue gas
Authors
KeywordsAbsorption
desulfurization
flue gas
reuse
SO2
wastewater
Issue Date2003
PublisherIWA Publishing.
Citation
The 3rd World Water Congress of the International Water Association, Melbourne, Australia, 7-12 April 2002. In Water Science & Technology, 2003, v. 3 n. 3, p. 101-107 How to Cite?
AbstractAerobically treated wastewater effluent (ATWE), intrinsically having high alkalinity, was used to remove sulfur dioxide (SO2) in the flue gas of a coal power plant. Experimental results conducted in a four sieve-tray tower showed that ATWE absorbed SO2 in flue gas effectively. At a gas:liquid (G:L) ratio of 110:1, the respective SO2 removal efficiencies were 99% and 95% for flue gases containing 1,600 and 5,000 Mg/kL of SO2. When the G:L ratio increased to 220:1, the removal efficiency was slightly lowered to 93% for the flue gas containing 1,600 Mg/kL of SO2. ATWE had higher buffer capacity and SO2 removal efficiencies as compared to seawater, a common SO2 scrubbing medium serving as control. In addition, the equilibrium equation between SO2 partial pressure and concentration of bisulfite (HSO3-) in ATWE and the kinetic equation describing the rate of SO2 absorption in the sieve-tray tower by ATWE were established. The absorbing coefficients in the kinetic equation were determined to be 1.96 ± 0.37 mol/(m2ásábar) for gas phase and 0.00184 ± 0.00049 m/s for liquid film. The enhancement factor of the absorbing coefficient in liquid film was 14.28 ± 1.79, resulting in 93% of the decrease of liquid film resistance. The SO2 absorption rate in the sieve-tray tower was mainly affected by the gas film resistance, representing 96% of the total resistance. Experimental results of this study confirmed that the removal of SO2 from the flue gas of coal power plants by ATWE was cost-effective. This process does not require the addition of any chemicals and produces no secondary pollution.
Persistent Identifierhttp://hdl.handle.net/10722/111100
ISSN
2015 Impact Factor: 0.532
2015 SCImago Journal Rankings: 0.315

 

DC FieldValueLanguage
dc.contributor.authorLiu, Yen_HK
dc.contributor.authorMa, LMen_HK
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorGao, TYen_HK
dc.contributor.authorXu, ZXen_HK
dc.contributor.authorWang, YC-
dc.contributor.authorJing, ZG-
dc.date.accessioned2010-09-26T02:34:33Z-
dc.date.available2010-09-26T02:34:33Z-
dc.date.issued2003en_HK
dc.identifier.citationThe 3rd World Water Congress of the International Water Association, Melbourne, Australia, 7-12 April 2002. In Water Science & Technology, 2003, v. 3 n. 3, p. 101-107-
dc.identifier.issn1606-9749-
dc.identifier.urihttp://hdl.handle.net/10722/111100-
dc.description.abstractAerobically treated wastewater effluent (ATWE), intrinsically having high alkalinity, was used to remove sulfur dioxide (SO2) in the flue gas of a coal power plant. Experimental results conducted in a four sieve-tray tower showed that ATWE absorbed SO2 in flue gas effectively. At a gas:liquid (G:L) ratio of 110:1, the respective SO2 removal efficiencies were 99% and 95% for flue gases containing 1,600 and 5,000 Mg/kL of SO2. When the G:L ratio increased to 220:1, the removal efficiency was slightly lowered to 93% for the flue gas containing 1,600 Mg/kL of SO2. ATWE had higher buffer capacity and SO2 removal efficiencies as compared to seawater, a common SO2 scrubbing medium serving as control. In addition, the equilibrium equation between SO2 partial pressure and concentration of bisulfite (HSO3-) in ATWE and the kinetic equation describing the rate of SO2 absorption in the sieve-tray tower by ATWE were established. The absorbing coefficients in the kinetic equation were determined to be 1.96 ± 0.37 mol/(m2ásábar) for gas phase and 0.00184 ± 0.00049 m/s for liquid film. The enhancement factor of the absorbing coefficient in liquid film was 14.28 ± 1.79, resulting in 93% of the decrease of liquid film resistance. The SO2 absorption rate in the sieve-tray tower was mainly affected by the gas film resistance, representing 96% of the total resistance. Experimental results of this study confirmed that the removal of SO2 from the flue gas of coal power plants by ATWE was cost-effective. This process does not require the addition of any chemicals and produces no secondary pollution.-
dc.languageengen_HK
dc.publisherIWA Publishing.-
dc.relation.ispartofWater Science & Technologyen_HK
dc.subjectAbsorption-
dc.subjectdesulfurization-
dc.subjectflue gas-
dc.subjectreuse-
dc.subjectSO2-
dc.subjectwastewater-
dc.titleReuse of an aerobically treated wastewater effluent for the removal of SO2 in the flue gasen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailFang, HHP: hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.identifier.hkuros67265en_HK

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