Impact of humidity rate on the biodegradation of municipal solid wastes from Veracruz city, Mexico
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Abstract
The Veracruz State (Mexico), produces about 5,280 tons daily of municipal solid waste (MSW), 70% of them are disposed withoutany technology in open places and there are only five landfills available (INEGI, 2005). This study proposes to analyze the humidity rateimpact in MSW biodegradation in Veracruz City, using lab scale bioreactors. Three bioreactors were designed, built and loaded withhomogeneous samples of MSW of Veracruz City landfill; they were humidified twice with leachates collected in the lagoons of the finaldisposal site. The valves located in the equipment bottom and top, allowed to take biogas and leachates samples. This experiment wasdeveloped during 118 days. In first step, the hydrolysis rate of the MSW organic fraction reached 274 mgDQO/l d and in second step itwas quadruple. On the other hand, conductivity was 10,200 and rose to 150,000 μS/cm. Finally, humidity generated for leachatesaccelerates the hydrolysis rate of organic fraction in MSW. However acidogenesis was inhibited due to there was no AVG’s and methaneproduction. Because of this, next stages were no developed.
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References
Diamadopopulos E., 1994. Characterization and treatment ofrecirculation-stabilized leachate. Water Research, 28: 2493-2445.
Houbron E., Larrinaga A., Rustrián E., 2003. Liquefaction andmethanization of solid and liquid coffee wastes by twophase anaerobic digestion process. Water Science andTechnology, 48: 255-262.
Instituto Nacional de Estadística Geografía e Informática,INEGI, 2005. Censo general de población y vivienda.Estadísticas ambientales. México.
McBean E.A., Rovers F.A., and Farquhz G.J., 1995. Treatmentof leachate. In: Solid wastes landfill engineering and design.Prentice Hall. PTR, Eglewood Cliffs, NJ. USA.
Norma Mexicana NMX-AA-16-1984, protección al ambiente-Contaminación del suelo-Residuos sólidos municipales-Determinación de humedad. Diario oficial de la federación,14-12-1984. México.
Norma Mexicana NMX-AA-18-1984, protección al ambiente-Contaminación del suelo-Residuos sólidos municipales-Determinación de cenizas. Diario oficial de la federación,10-12-1984. México.
Norma Oficial Mexicana NOM-001-SEMARNAT-1996. Diariooficial de la federación, 11-10-1996. México.
Norma Oficial Mexicana NOM-083-SEMARNAT-2003. Diariooficial de la federación, 20-10-2004. México.
Noyola A., Kano G.M.T., and Ordeñana P., 1992. Anaerobictreatability of sanitary landfill leachates. Instituto deIngeniería. UNAM. Technical Report, Mexico.
Palma J., Espinace R., Valenzuela P., Szanto M., 1999.Reducción de los tiempos de estabilización en rellenossanitarios operados con recirculación de lixiviados. XIIICongreso de Ingeniería Sanitaria y Ambiental, AIDIS,Chile, 1-6.
Reinhart D.R., and Al-Yousfi A.B., 1996. The impact ofleachate recycling on municipal solid waste landfilloperating characteristics. Waste Management and Research,14: 337-346.
Robles Martínez, F., 2005. Formación de biogás y lixiviados. EnGeneración de biogás y lixiviados en los rellenos sanitarios.Instituto Politécnico Nacional, México, 32.
Torres L., Perez S., Bello G. and Orta T., 1999. Characterizationand biodegradability of leachates arising from Ciudad deMexico sanitary landfill Bordo Poniente Step IV. 1er.Simposio Latinoamericano de Tratamiento y Reuso delAgua y Residuos Industriales, Mexico.
Veeken, A., Kalyuzhnyi S., Scharff, H., Hamelers, B., 2000.Effect of pH and VFA on hydrolysis of organic solid waste.Journal of Environmental Engineering, 126: 1076-1081.
Weimer, R., 1996. Estadística. En análisis de la varianza.Compañía Editorial Continental, S.A. de C.V. México.
Yilmaz A. H. and Atalay F. S., 2003. Modeling of the AnaerobicDecomposition of Solid Wastes. Energy Sources, 25: 1063-1072.