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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/30691

Title: Effect of sludge age on the digestion of the liquor obtained after endogenous enzymatic hydrolysis
Author(s): Marañón Maison, María Elena
Negral Álvarez, Luis
Fernández Nava, Yolanda
Castrillón Peláez, Leonor
Ormaechea Menéndez, Pedro
Keywords: Enzymatic pretreatment
Inverted phase fermentation
Methane production
Co-digestion
Glycerin
Sludge age
Issue date: May-2014
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: 4th European Conference on Sludge Management 26th-27th May 2014, Izmir (Turkey)
URI: http://hdl.handle.net/10651/30691
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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