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bacteria, and SRB suggest a potential biocorrosion risk in each case for the conveyor belt of the USW plant. The low pH values, the chloride, and sul- fate concentrations in the leachate could prove to be an inorganic corro- sion risk at the different sampling areas of the plant, which means a po- tential risk of significant economic loss in the plant facilities. • Although the biocide protected the steel structures from generalized cor- rosion, the bacteriostatic behavior from microorganisms remains; thus it would be advisable to use biocides and other products to increase the treatment efficiency. Acknowledgments Th e authors thank th e Universidad Nacional de La Plata (UNLP 11N 713 and 11X 632), the Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICBA-243/13), and the Consejo Nacional de Investigaciones Científica y Técnica (CONICET, PIP 0200) for their financial support. References 1 C.C. Goller, T. Romeo, "Environmental Influ- ences on Biofilms Development," Curr. Top. Microbiol. Immunol. 322 (2008): pp. 37-66. 2 T.F. Maha, G.A. O' Toole, "Mechanisms of Biofilm Resistance to Antimicrobial Agents," Trends Microbiol. 9 (2001): pp. 34-39. 3 P.S. Guiamet, S.G. Gómez de Saravia, "Labo- ratory Studies of Biocorrosion Control Using Traditional and Environmentally Friendly Biocides: An Overview," LAAR 35 (2005): pp. 295-300. 4 J.W. Costerton, "Bacterial Attachment to Surfaces," C. Eckey, ed., The Biofilm Primer (Berlin, Germany : Springer, 2007), pp. 36-43. 5 S. Gómez de Saravia, S. Borrego, P. Lavin, O. Valdés, I. Vivar, P. Battistoni, P. Guiamet, "Environmentally Friendly Products from Pl ants in th e C ontrol of Bio d et eriogen Agents," NPAIJ 9, 5 (2013): pp. 167-174. 6 F. Martinez-Gutierrez, L. Boegli, A. Agostinho, E. Morales Sánchez, H. Bach, F. Ruiz, G. James, "Anti-Biofilm Activity of Silver Nanoparticles against Different Micro organisms," Biofouling 29, 6 (2013): pp. 651-660. 7 B. Pesic, V.C. Storhok, "Biocorrosion of Iron w ith Th i o b a c i l l u s Fe r ro ox i d a n s - L i n e a r Polarization Study," CORROSION 2001, paper no. 1255 (Houston, TX: NACE International, 2001). 8 D.A. Jones, P.S. Amy, "A Thermodynamic In- terpretation of Microbiologically Influenced Corrosion," CORROSION 2002, paper no. 58 (Houston, TX: NACE, 2002). 9 W.G. Characklis, "Influence of Microbial Bio- films on Industrial Processes," Proc. Argen- tine-USA Workshop on Biodeterioration (H.A. Videla, ed.) (Sao Paulo, Brazil: Aquatec Quimica, 1986), pp. 181-216. 10 C.C. Gaylarde, H.A. Videla, "Localized Corro- sion Induced by a Marine Vibrio," Int. Biodegr. 23 (1987): pp. 91-104. 11 G. Welton, M. Ribas Silva, C.C. Gaylarde, L.K. Herrera, X. Anleo, N. De Belie, S. Modry, "Microbial Impacts on Building Materials— Weathering and Conservation," Mater. Struct. 38 (2005): pp. 883-893. 12 P.S. Guiamet, A. Mugnolo, S.G. Gómez de Saravia, "Microbiological Biodeterioration of the Structural Materials in a Solid Waste/Re- cycling Plant in an Urban Buenos Aires Prov- ince," Proc. 14th International Symposium on Biodeterioration and Biodegradation, held October 6-11, 2008 (Messina, Italy : IBBS, 2008), p. 40. 13 H.A. Videla, P.S. Guiamet, S.G. Gómez de Saravia, L.K. Herrera, C. Gaylarde, "Environ- mentally Friendly Approaches to Inhibit Bio- corrosion, An Overview," CORROSION 2004, paper no. 04574 (Houston, TX: NACE, 2004). 14 M.T. Madigan , J.M. Martinko, P. Dunlap, D. Clark, eds., Brock Biolog y of Microorgan- isms, 12th ed. (San Francisco, CA: Benjamín Cummings, 2009), p. 1,168. 15 H . A . Vi d e l a , P. S . G u i a m e t , O. Pa rd i n i , M.S. Freitas, E. Echarte, "Monitoring Biofilms and MIC in an Oilfield Water Injection Sys- tem," CORROSION/91, paper no. 103 (Hous- ton, TX: NACE, 2001). 16 R .G. Edyvean, H.A. Videla, "Biological Cor- rosión," Interdiscipl . Sc. Rev. 16 (1991): pp. 267-284. 17 R .A. King, "Monitoring Techniques for Bio- logically Induced Corrosion," Bioextraction and Biodeterioration of Metals, C.C. Gaylarde, H.A. Videla, eds. (Cambridge, U.K.: Cam- bridge University Press, 2009), pp. 271-305. 18 D. C etil , A. Mehm et Le vent, "Corrosion Behavior of Low-Alloy Steel in the Presence FIGURE 4 SEM micrographs (3500X) of metal samples: (a) control, (b) before, and (c) after application of the biocide. of Desulfotomaculum sp." Corros. Sci . 51, 8 (2009): pp. 1,584-1,588. PATRICIA S. GUIAMET is a professor at the University of La Plata, Laboratory of Biodete - rioration of Materials, INIFTA-UNLP-CONICET, St. 64 and Diag. 113 S/N CC 16, Suc. 4 (1900), La Plata (FCV), Argentina, e-mail: pguiamet@ inifta.unlp.edu.ar. She has 30 years of experi - ence in the research and mitigation of biode- terioration, biocorrosion, and problems in the field of cultural heritage. She is a member of NACE International. PAOLA LAVIN is a Ph.D. student at the Univer - sity of La Plata, Laboratory of Biodeterioration of Materials, INIFTA-UNLP-CONICET, e-mail: paolalavin@gmail.com. He is involved in the prevention and control of the biodeterioration of materials important to heritage. He con - ducts research on organic and inorganic mate- rials and biodeterioration by the activity of complex microbial communities. LILIANA GASSA is an engineering researcher at the University of La Plata, INIFTA-UNLP- CONICET. She studies the electrochemical be - havior of additive compounds on various met- als, electrode kinetics, and mechanisms of metal electrodeposition reactions and elec - trodissolution of materials of technological interest. SANDRA GABRIELA GÓMEZ DE SARAVIA is a Ph.D. researcher CICBA and professor at the University of La Plata (FCNyM), Laboratory of Biodeterioration of Materials, INIFTA-UNLP- CONICET, e-mail: sgomez@inifta.unlp.edu.ar. Her research interests include biofouling and biocorrosion in seawater and in various indus - trial systems and bio deterioration of cultural heritage materials. She also studies the bio - cidal activity of natural extract and essential oils. 55 NACE INTERNATIONAL: VOL. 53, NO. 6 MATERIALS PERFORMANCE JUNE 2014 Mitigation of Biocorrosion in an Urban Solid Waste Treatment Plant June 2014 MP.indd 55 5/14/14 1:46 PM