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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/30687

Title: Enhancing the methane potential of the liquor obtained from enzymatic pre-treatment of sewage sludge by the addition of glycerin
Author(s): Negral Álvarez, Luis
Marañón Maison, María Elena
Castrillón Peláez, Leonor
Fernández Nava, Yolanda
Ormaechea Menéndez, Pedro
Keywords: Inverted phase fermentation
Sewage sludge
Crude glycerin
Anaerobic co-digestion
Issue date: May-2013
Abstract: Inverted Phase Fermentation is a method for thickening sewage sludge that results in a clarified phase beneath a thickened fraction. An increased hydrolysis rate is obtained in both phases. The liquid phase or liquor was digested in UASB reactors. The optimum methane yield was obtained for hydraulic retention time of 1 day (0.32 m3 CH4/kg VS, 2.31 m3 CH4/m3reactor day). When this liquor was co-digested with 1% (v/v) crude glycerin, the optimum methane yield was obtained when operating at hydraulic retention time of 2 days (0.67 m3 CH4/kg VS, 2.76 m3CH4/m3reactor day). Co-digestion of the liquor with crude glycerin not only improved specific methane yield, but also organic matter biodegradation (up to 89% total COD and up to 76% VS removal).
Description: 17th European Biosolids and Organic Resources Conference, 23rd-25th May 2013, Portalegre (Portugal)
URI: http://hdl.handle.net/10651/30687
Sponsored: European Union Seventh Framework Programme (FP7-ENV.2010.3.1.1-2 ENV) under Grant Agreement no. 265269. Project: END-O-SLUDG
Project id.: info:eu-repo/grantAgreement/EC/FP7/265269
Appears in Collections:Ponencias, Discursos y Conferencias
Ingeniería Química y Tecnología del Medio Ambiente
Investigaciones y Documentos OpenAIRE

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