Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry

Bibliographic Details
Main Author: Sousa, Silvia
Publication Date: 2021
Other Authors: Duarte, Elizabeth, Mesquita, Marta, Saraiva, Sandra
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10400.5/21396
Summary: Original Research
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
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spelling Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurryanaerobic co-digestioncereal and exhausted coffee wastespig slurrybiogas productionwaste managementbiowastes circularityOriginal ResearchIn the past years, there has been steady growth in work relating to improve resource efficiency through wasteminimization and bioenergy recovery tomitigate climate change. Agro-food industries produce large amounts of bio-waste, challenging innovative energetic valorization strategies in the framework of circular economy principles. Anaerobic digestion (AD) technology is an interesting route to stabilize organic matter and produce biogas as a renewable energy source. This study involves continuous co-digestion of pig slurry (PS), cereal and exhausted coffee wastes (CECW) performed in a continuously stirred tank reactor, with a hydraulic retention time (HRT) of 16 days under at mesophilic conditions (36.9 ± 0.3◦C). The experimental trials, were designed to include different cereal and exhausted coffee liquor (CECL) shares in the feeding mixture, corresponding to different PS to CECL ratios (PS:CECL), respectively: 100:0 (T0), 90:10 (T1), 80:20 (T2), and 70:30 (T3), in terms of percentage of inlet feeding rate (v:v). The results obtained for the feeding rate (70:30) yield to the highest specific methane production (SMP = 341ml.gVS−1) led to a 3.5-fold improvement in comparison with the reference scenario. The synergetic effect between the microbial consortia of PS and the high carbon to nitrogen ratio (C/N) of CECL explain the improvements achieved. The maximum soluble chemical oxygen demand (SCOD) reduction (84.0%) due to the high content and soluble chemical oxygen demand to total chemical oxygen demand ratio (SCOD/TCOD) corroborate the results achieved. The digester stability, evaluated by specific energetic loading rate, was below the limit (0.4 d−1). Results from ANOVA showed a significant effect of CECL on the resulting GPR and SMP values. Additionally, Tukey’s “Honest Significant Difference” method, confirmed statistically significant differences between the trials T3-T0, T3-T1, T3-T2, and T2-T0. Thus, co-digestion of PS and of CECL seems to be a promising approach for bioenergy recovery and promoting biowastes circularityFrontiers in Sustainable Food SystemsRepositório da Universidade de LisboaSousa, SilviaDuarte, ElizabethMesquita, MartaSaraiva, Sandra2021-05-31T14:28:14Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/21396engSousa S, Duarte E, Mesquita M and Saraiva S (2021) Energetic Valorization of Cereal and Exhausted Coffee Wastes Through Anaerobic Co-digestion With Pig Slurry. Front. Sustain. Food Syst. 5:64224410.3389/fsufs.2021.642244info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T16:12:28Zoai:repositorio.ulisboa.pt:10400.5/21396Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T04:05:56.938074Repositórios 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 Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
title Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
spellingShingle Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
Sousa, Silvia
anaerobic co-digestion
cereal and exhausted coffee wastes
pig slurry
biogas production
waste management
biowastes circularity
title_short Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
title_full Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
title_fullStr Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
title_full_unstemmed Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
title_sort Energetic valorization of cereal and exhausted coffee wastes through anaerobic co-digestion with pig slurry
author Sousa, Silvia
author_facet Sousa, Silvia
Duarte, Elizabeth
Mesquita, Marta
Saraiva, Sandra
author_role author
author2 Duarte, Elizabeth
Mesquita, Marta
Saraiva, Sandra
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Sousa, Silvia
Duarte, Elizabeth
Mesquita, Marta
Saraiva, Sandra
dc.subject.por.fl_str_mv anaerobic co-digestion
cereal and exhausted coffee wastes
pig slurry
biogas production
waste management
biowastes circularity
topic anaerobic co-digestion
cereal and exhausted coffee wastes
pig slurry
biogas production
waste management
biowastes circularity
description Original Research
publishDate 2021
dc.date.none.fl_str_mv 2021-05-31T14:28:14Z
2021
2021-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/21396
url http://hdl.handle.net/10400.5/21396
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Sousa S, Duarte E, Mesquita M and Saraiva S (2021) Energetic Valorization of Cereal and Exhausted Coffee Wastes Through Anaerobic Co-digestion With Pig Slurry. Front. Sustain. Food Syst. 5:642244
10.3389/fsufs.2021.642244
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Frontiers in Sustainable Food Systems
publisher.none.fl_str_mv Frontiers in Sustainable Food Systems
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
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