Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission

Bibliographic Details
Main Author: Regueiro Carrera, Iria Maria
Publication Date: 2016
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10400.5/12014
Summary: Doutoramento em Engenharia do Ambiente - Instituto Superior de Agronomia - UL
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
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spelling Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emissionslurry acidificationmechanical separationgaseous emissionsslurry compositionstorageDoutoramento em Engenharia do Ambiente - Instituto Superior de Agronomia - ULAcidification of slurry is used to reduce NH3 emissions and mechanical separation facilities the management of slurry on farms. Acidification and mechanical separation are currently implemented independently at the farm scale in different European countries. However there are drawbacks associated to the current acidification treatment, and it is unknown how acidification before separation affects slurry characteristics and gaseous emissions. This thesis presents an in-depth investigation of the combined acidification and separation of slurry by analyzing the composition of the fractions obtained and the impact on gaseous emissions during storage. Systematic studies for acidification were performed using different additives, target pH values and approaches and different techniques were used to separate different types of slurries. The effects of acidification on slurries dry matter, organic matter and nutrient (N and P) content and their soluble forms were studied and gaseous emissions were followed during storage. The effects of acidification on slurry particle size, nutrient distribution among particles and on separation efficiency were studied. In the acidification experiments, alum emerged as a highly efficient additive for reducing NH3 emissions. The nutrient composition and potential of N mineralization of acidified slurry fractions differed depending on the separation technique used. Acidification affected differently the particle size in slurries, the nutrient distribution among particles and the separation efficiency depending on the additive used. The use of alum promoted an increase of the solid fraction and an almost complete removal of P (90%) to the solid fraction. According to our results, combined acidification and separation improves slurry management: It increases the amount of solid fractions, preserves N in slurries by reducing NH3 emissions during separation, increases the P separation efficiency to the solid fraction, and reduces the total NH3 and GHG emissions during storage. Therefore, the combined technology provides farmers with an economically sound and environmentally safe approach to slurry re-useISA-ULFangueiro, DavidMendes, João Filipe CoutinhoRepositório da Universidade de LisboaRegueiro Carrera, Iria Maria2019-01-01T01:30:18Z20162016-01-01T00:00:00Zdoctoral thesisinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10400.5/12014TID:101406550engRegueiro Carrera, I.M. - Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission. Lisboa: ISA, 2016, 212 p.info:eu-repo/semantics/embargoedAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T16:10:02Zoai:repositorio.ulisboa.pt:10400.5/12014Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T04:04:43.688327Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
title Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
spellingShingle Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
Regueiro Carrera, Iria Maria
slurry acidification
mechanical separation
gaseous emissions
slurry composition
storage
title_short Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
title_full Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
title_fullStr Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
title_full_unstemmed Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
title_sort Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission
author Regueiro Carrera, Iria Maria
author_facet Regueiro Carrera, Iria Maria
author_role author
dc.contributor.none.fl_str_mv Fangueiro, David
Mendes, João Filipe Coutinho
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Regueiro Carrera, Iria Maria
dc.subject.por.fl_str_mv slurry acidification
mechanical separation
gaseous emissions
slurry composition
storage
topic slurry acidification
mechanical separation
gaseous emissions
slurry composition
storage
description Doutoramento em Engenharia do Ambiente - Instituto Superior de Agronomia - UL
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
2019-01-01T01:30:18Z
dc.type.driver.fl_str_mv doctoral thesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/12014
TID:101406550
url http://hdl.handle.net/10400.5/12014
identifier_str_mv TID:101406550
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Regueiro Carrera, I.M. - Development of combined acidification and separation of slurry: effect on slurry fractions composition and gaseous emission. Lisboa: ISA, 2016, 212 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA-UL
publisher.none.fl_str_mv ISA-UL
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833601934081130496

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