Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction

Detalhes bibliográficos
Autor(a) principal: Borges,E. S. M.
Data de Publicação: 2009
Outros Autores: Chernicharo,C. A. L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Chemical Engineering
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322009000300003
Resumo: Most works reported in the literature focus on thermal treatment of waste activated sludge at temperatures in the range of 160 to 180ºC. This research aimed at evaluating the thermal treatment of excess anaerobic sludge at much lower temperatures, using biogas generated in the wastewater treatment process as the energy source for heating a simplified thermal reactor. Direct burning of the biogas allowed an increase in the sludge temperature up to values close to 75ºC, for a 7-hour heating period. Sludge samples taken at different heating times showed that the thermal disintegration of the organic fraction allowed increases in the concentration of protein, carbohydrate, lipid and COD parameters by 30 to 35 times, as well as a 50% increase in the biogas production. Moreover, the simplified thermal treatment system proved to be an effective alternative for recovering energy from biogas and for controlling methane emissions to the atmosphere.
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spelling Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fractionAnaerobic sludgeBioavailabilityBiodegradabilityBiogasThermal treatmentUASB reactorMost works reported in the literature focus on thermal treatment of waste activated sludge at temperatures in the range of 160 to 180ºC. This research aimed at evaluating the thermal treatment of excess anaerobic sludge at much lower temperatures, using biogas generated in the wastewater treatment process as the energy source for heating a simplified thermal reactor. Direct burning of the biogas allowed an increase in the sludge temperature up to values close to 75ºC, for a 7-hour heating period. Sludge samples taken at different heating times showed that the thermal disintegration of the organic fraction allowed increases in the concentration of protein, carbohydrate, lipid and COD parameters by 30 to 35 times, as well as a 50% increase in the biogas production. Moreover, the simplified thermal treatment system proved to be an effective alternative for recovering energy from biogas and for controlling methane emissions to the atmosphere.Brazilian Society of Chemical Engineering2009-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322009000300003Brazilian Journal of Chemical Engineering v.26 n.3 2009reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66322009000300003info:eu-repo/semantics/openAccessBorges,E. S. M.Chernicharo,C. A. L.eng2009-09-04T00:00:00Zoai:scielo:S0104-66322009000300003Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2009-09-04T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false
dc.title.none.fl_str_mv Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
title Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
spellingShingle Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
Borges,E. S. M.
Anaerobic sludge
Bioavailability
Biodegradability
Biogas
Thermal treatment
UASB reactor
title_short Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
title_full Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
title_fullStr Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
title_full_unstemmed Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
title_sort Effect of thermal treatment of anaerobic sludge on the bioavailability and biodegradability characteristics of the organic fraction
author Borges,E. S. M.
author_facet Borges,E. S. M.
Chernicharo,C. A. L.
author_role author
author2 Chernicharo,C. A. L.
author2_role author
dc.contributor.author.fl_str_mv Borges,E. S. M.
Chernicharo,C. A. L.
dc.subject.por.fl_str_mv Anaerobic sludge
Bioavailability
Biodegradability
Biogas
Thermal treatment
UASB reactor
topic Anaerobic sludge
Bioavailability
Biodegradability
Biogas
Thermal treatment
UASB reactor
description Most works reported in the literature focus on thermal treatment of waste activated sludge at temperatures in the range of 160 to 180ºC. This research aimed at evaluating the thermal treatment of excess anaerobic sludge at much lower temperatures, using biogas generated in the wastewater treatment process as the energy source for heating a simplified thermal reactor. Direct burning of the biogas allowed an increase in the sludge temperature up to values close to 75ºC, for a 7-hour heating period. Sludge samples taken at different heating times showed that the thermal disintegration of the organic fraction allowed increases in the concentration of protein, carbohydrate, lipid and COD parameters by 30 to 35 times, as well as a 50% increase in the biogas production. Moreover, the simplified thermal treatment system proved to be an effective alternative for recovering energy from biogas and for controlling methane emissions to the atmosphere.
publishDate 2009
dc.date.none.fl_str_mv 2009-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322009000300003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322009000300003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-66322009000300003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
dc.source.none.fl_str_mv Brazilian Journal of Chemical Engineering v.26 n.3 2009
reponame:Brazilian Journal of Chemical Engineering
instname:Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ
instname_str Associação Brasileira de Engenharia Química (ABEQ)
instacron_str ABEQ
institution ABEQ
reponame_str Brazilian Journal of Chemical Engineering
collection Brazilian Journal of Chemical Engineering
repository.name.fl_str_mv Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)
repository.mail.fl_str_mv rgiudici@usp.br||rgiudici@usp.br
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