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An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment

Sewage sludge is a by-product of primary and secondary treatment of wastewater and requires treatment to reduce the bulk by removing water content, stabilise the putrescible organic substrates contained in sludge and condition the product to meet management and recycling regulations (Appels et al.,...

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Autor Principal: Daza Donoso, Pablo Jos?
Formato: Tesis de Maestría
Lenguaje:eng
Publicado: Imperial College London / 2012 2013
Materias:
ANAEROBIC DIGESTION
HYDROLYSIS PROCESS
BIOGAS PRODUCTION
PATHOGEN INACTIVATION
Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/769
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spelling oai:localhost:28000-7692017-02-21T19:42:25Z An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment Daza Donoso, Pablo Jos? ANAEROBIC DIGESTION HYDROLYSIS PROCESS BIOGAS PRODUCTION PATHOGEN INACTIVATION Sewage sludge is a by-product of primary and secondary treatment of wastewater and requires treatment to reduce the bulk by removing water content, stabilise the putrescible organic substrates contained in sludge and condition the product to meet management and recycling regulations (Appels et al., 2008). The social, economic and environmental issues surrounding the production of sewage sludge and the pressure from authorities has incentivised the development of advanced technologies to optimise its energetic and disposal features. 2013-06-26T15:13:18Z 2013-06-26T15:13:18Z 2012 masterThesis Mesophilic anaerobic dugestion of thermally hydrolysed sludge (THD) and thermophilic anaerobic digestion (TAD) were simulated in laboratory-scale, semi-continuous reactors and compare to mesophilic anaerobic digestion (MAD) with respect to volatile solids reduction (VSR), methane yield and pathogen inactivation. The treatments were run in an aproximate steady-state condition for a oeriod of 64 days and monitored for stability parameters (pH, alkalinity and volatile fatty acids), dry solids (DS), volatile solids (VS), gas production and E. coli numbers. The substrate used for digestion was mixed sludge from a wastewater treatment plant at a constant 60:40% primary to activated sludge ratio. The operating temperatures were 38% for THD and MAD and 56?C for TAD. The solids retention time (SRT) was 10 days for THD and TAD, and 16 days for MAD. The organic loading rates in THD and TAD were higher than typical MAD loadings and yet sustained stable anaerobic digestion. Under these condition, THD and TAD had no significant differences compared to MAD regarding VSR and methane yield, but a modelling study demonstrated that this was caused by operating al lower SRTs. Finally, the potential for pathogen inactivation and compliance to microbial quality standards of the treatments was assessed and compared. http://repositorio.educacionsuperior.gob.ec/handle/28000/769 eng openAccess http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ 89 p. Imperial College London / 2012
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Tesis de Maestría
topic ANAEROBIC DIGESTION
HYDROLYSIS PROCESS
BIOGAS PRODUCTION
PATHOGEN INACTIVATION
spellingShingle ANAEROBIC DIGESTION
HYDROLYSIS PROCESS
BIOGAS PRODUCTION
PATHOGEN INACTIVATION
Daza Donoso, Pablo Jos?
An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
description Sewage sludge is a by-product of primary and secondary treatment of wastewater and requires treatment to reduce the bulk by removing water content, stabilise the putrescible organic substrates contained in sludge and condition the product to meet management and recycling regulations (Appels et al., 2008). The social, economic and environmental issues surrounding the production of sewage sludge and the pressure from authorities has incentivised the development of advanced technologies to optimise its energetic and disposal features.
author Daza Donoso, Pablo Jos?
author_facet Daza Donoso, Pablo Jos?
author_sort Daza Donoso, Pablo Jos?
title An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
title_short An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
title_full An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
title_fullStr An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
title_full_unstemmed An Experimental Investigation of Advanced Digestion Processes for Sewage Sludge Treatment
title_sort experimental investigation of advanced digestion processes for sewage sludge treatment
publisher Imperial College London / 2012
publishDate 2013
url http://repositorio.educacionsuperior.gob.ec/handle/28000/769
_version_ 1634994955339431936
score 11,871979

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