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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/33967

Title: Differences in soluble COD and ammonium when applying inverted phase fermentation to primary, secondary and mixed sludge
Author(s): Negral Álvarez, Luis
Marañón Maison, María Elena
Castrillón Peláez, Leonor
Fernández Nava, Yolanda
Issue date: Oct-2015
Publisher: IWA Publishing
Citation: Water Science and Technology, 72(8), p. 1390-1397 (2015); doi:10.2166/wst.2015.351
Format extent: p. 1390-1397
Abstract: Primary, secondary and mixed sludge were treated by inverted phase fermentation. This treatment results in solid–liquid separation of sludge after endogenous enzymatic hydrolysis (anaerobic conditions: 42°C, 48 hours). The soluble chemical oxygen demand (sCOD) was increased in the solid phase up to 1,800%, 21,300% and 260% in primary, secondary and mixed sludge, respectively. The corresponding increase in sCOD in the liquid phase accordingly reached values of up to 440%, 5,100% and 140%. Phase separation led to an enrichment of volatile solids in the solid phase (89–358% primary sludge, 80–102% secondary sludge and 29–133% mixed sludge). The NH4+-N values increased notably after the endogenous enzymatic hydrolysis itself. To investigate the short-term evolution following the treatment, the variation in sCOD, NH4+-N and solids was also monitored after keeping the hydrolysate at 37°C under anaerobic conditions for 24 hours. This stage showed no generalized pattern in terms of sCOD
URI: http://wst.iwaponline.com/content/72/8/1390.abstract
ISSN: 0273-1223
Sponsored: The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7-ENV.2010.3.1.1–2 ENV) under Grant Agreement no. 265269
Project id.: FP7-ENV.2010.3.1.1–2 ENV under Grant Agreement no. 265269
Appears in Collections:Artículos
Ingeniería Química y Tecnología del Medio Ambiente
Investigaciones y Documentos OpenAIRE

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