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Treatment of IGCC power station effluents by physico-chemical and advanced oxidation processes.
J Environ Manage. 2009 Mar; 90(3):1370-6.JE

Abstract

The aim of this work was to improve the quality of aqueous effluents coming from the Gasification Unit in an Integrated Gasification Combined Cycle (IGCC) Thermoelectric Power Station, with the purpose of fulfilling the future more demanding normative. To this end, an integral wastewater treatment including coagulation, flocculation, neutralization, photocatalytic oxidation, and ion-exchange has been studied. A final scheme has been proposed to remove pollutants. All the parameters of the treated wastewater are below pouring specifications. In the first stage, the wastewater was treated with CaCl2 (optimal dose=11 g CaCl2/g F-) as coagulant and a commercial anionic polyelectrolyte (optimal dose=0.02 g/g F-) as flocculant to remove fluoride ions (99%) and suspended solids (92%). The water was then neutralized, improving the degree of transmission of ultraviolet light, allowing the faster photo-degradation of pollutants. The photochemical study included different systems (H2O2, UV/H2O2, Fenton, Fenton-like, UV/Fenton, UV/Fenton-like and UV/H2O2/O2). In the Fenton-like system, the influence of two parameters (initial concentration of H2O2 and amount of Cu(II)) on the degradation of cyanide and formate (taken as the reference of the process) was studied. Experimental results were fit using neural networks (NNs). Results showed that the photocatalytic process was effective for total cyanide destruction after 60 min, while 180 min was needed to remove 80% of formates. However, a more simple system with UV/H2O2/O2 yields similar results and is preferred for industrial application due to fewer complications. Finally, an ion-exchange process with Amberlite IRA-420 was proposed to remove the excess of chlorides added as a consequence of the initial coagulation process.

Authors+Show Affiliations

Department of Chemical Engineering, Escuela Técnica Superior de Ingenieros Industriales, University of Castilla-La Mancha, Avda. Camilo José Cela 3, 13071 Ciudad Real, Spain. antonio.duran@uclm.esNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18801608

Citation

Durán, A, et al. "Treatment of IGCC Power Station Effluents By Physico-chemical and Advanced Oxidation Processes." Journal of Environmental Management, vol. 90, no. 3, 2009, pp. 1370-6.
Durán A, Monteagudo JM, Sanmartín I, et al. Treatment of IGCC power station effluents by physico-chemical and advanced oxidation processes. J Environ Manage. 2009;90(3):1370-6.
Durán, A., Monteagudo, J. M., Sanmartín, I., García-Peña, F., & Coca, P. (2009). Treatment of IGCC power station effluents by physico-chemical and advanced oxidation processes. Journal of Environmental Management, 90(3), 1370-6. https://doi.org/10.1016/j.jenvman.2008.08.002
Durán A, et al. Treatment of IGCC Power Station Effluents By Physico-chemical and Advanced Oxidation Processes. J Environ Manage. 2009;90(3):1370-6. PubMed PMID: 18801608.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Treatment of IGCC power station effluents by physico-chemical and advanced oxidation processes. AU - Durán,A, AU - Monteagudo,J M, AU - Sanmartín,I, AU - García-Peña,F, AU - Coca,P, Y1 - 2008/09/17/ PY - 2007/11/29/received PY - 2008/05/26/revised PY - 2008/08/03/accepted PY - 2008/9/20/pubmed PY - 2009/3/6/medline PY - 2008/9/20/entrez SP - 1370 EP - 6 JF - Journal of environmental management JO - J Environ Manage VL - 90 IS - 3 N2 - The aim of this work was to improve the quality of aqueous effluents coming from the Gasification Unit in an Integrated Gasification Combined Cycle (IGCC) Thermoelectric Power Station, with the purpose of fulfilling the future more demanding normative. To this end, an integral wastewater treatment including coagulation, flocculation, neutralization, photocatalytic oxidation, and ion-exchange has been studied. A final scheme has been proposed to remove pollutants. All the parameters of the treated wastewater are below pouring specifications. In the first stage, the wastewater was treated with CaCl2 (optimal dose=11 g CaCl2/g F-) as coagulant and a commercial anionic polyelectrolyte (optimal dose=0.02 g/g F-) as flocculant to remove fluoride ions (99%) and suspended solids (92%). The water was then neutralized, improving the degree of transmission of ultraviolet light, allowing the faster photo-degradation of pollutants. The photochemical study included different systems (H2O2, UV/H2O2, Fenton, Fenton-like, UV/Fenton, UV/Fenton-like and UV/H2O2/O2). In the Fenton-like system, the influence of two parameters (initial concentration of H2O2 and amount of Cu(II)) on the degradation of cyanide and formate (taken as the reference of the process) was studied. Experimental results were fit using neural networks (NNs). Results showed that the photocatalytic process was effective for total cyanide destruction after 60 min, while 180 min was needed to remove 80% of formates. However, a more simple system with UV/H2O2/O2 yields similar results and is preferred for industrial application due to fewer complications. Finally, an ion-exchange process with Amberlite IRA-420 was proposed to remove the excess of chlorides added as a consequence of the initial coagulation process. SN - 0301-4797 UR - https://www.unboundmedicine.com/medline/citation/18801608/Treatment_of_IGCC_power_station_effluents_by_physico_chemical_and_advanced_oxidation_processes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0301-4797(08)00208-9 DB - PRIME DP - Unbound Medicine ER -