Anaerobic digestion performance in the energy recovery of kiwi residues

Martins, Ramiro; Boaventura, Rui; Paulista, Larissa Oliveira

Publication

Anaerobic digestion performance in the energy recovery of kiwi residues

2017Conference paper

dc.contributor.author	Martins, Ramiro
dc.contributor.author	Boaventura, Rui
dc.contributor.author	Paulista, Larissa Oliveira
dc.date.accessioned	2018-03-13T15:03:43Z
dc.date.available	2018-03-13T15:03:43Z
dc.date.issued	2017
dc.description.abstract	World production and trade of fruits generate losses in the harvest, post-harvest, handling, distribution and consumption phases, corresponding to 6.8% of total production. These residues present high potential as a substrate for the anaerobic digestion process and biogas generation. Thus, the energy valuation of the agro-industrial residues of kiwi production was evaluated by anaerobic digestion, aiming at optimizing the biogas production and its quality. Ten assays were carried out in a batch reactor (500 mL) under mesophilic conditions and varying a number of operational factors: different substrate/inoculum ratios; four distinct values for C: N ratio; inoculum from different digesters; and inoculum collected at different times of the year. The following parameters were used to control and monitor the process: pH, alkalinity, volatile fatty acids (VFA), volatile solids (VS) and chemical oxygen demand (COD). Among the tests performed, the best result obtained for the biogas production corresponded to the use of 2 g of substrate and 98 mL of inoculum of the anaerobic digester of the Wastewater Treatment Plant (WWTP) of Bragança, with addition of 150 mg of bicarbonate leading to a production of 1628 L biogas.kg-1 VS (57% methane). In relation to the biogas quality, the best result was obtained with 20 g of substrate and 380 mL of inoculum from the anaerobic digester sludge of WWTP of Ave (with addition 600 mg of sodium bicarbonate), presenting a value of 85% of CH4, with a production of 464 L biogas.kg-1 VS.	pt_PT
dc.description.sponsorship	This work was financially supported by: Project POCI-01-0145-FE DER-006984 – Associate Laboratory LSRE-LCM funded by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) – and by national funds through FCT – Fundação para a Ciência e a Tecnologia.
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Martins, Ramiro; Boaventura, Rui; Larissa, Paulista (2017). Anaerobic digestion performance in the energy recovery of kiwi residues. In IOP Conference Series: Earth and Environmental Science. Prague: IOP Publishing Ltd. ISSN 1755-130	pt_PT
dc.identifier.doi	10.1088/1755-1315/95/4/042044	pt_PT
dc.identifier.issn	1755-1307
dc.identifier.uri	http://hdl.handle.net/10198/16280
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	IOP Publishing	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Anaerobic digestion	pt_PT
dc.subject	Energy recovery	pt_PT
dc.subject	Kiwi residues	pt_PT
dc.title	Anaerobic digestion performance in the energy recovery of kiwi residues	pt_PT
dc.type	conference paper
dspace.entity.type	Publication
oaire.citation.conferencePlace	Czech Republic	pt_PT
oaire.citation.issue	4	pt_PT
oaire.citation.startPage	042044	pt_PT
oaire.citation.title	IOP Conf. Series: Earth and Environmental Science	pt_PT
oaire.citation.volume	95	pt_PT
person.familyName	Martins
person.givenName	Ramiro
person.identifier.ciencia-id	EA17-F39C-29C7
person.identifier.orcid	0000-0003-4327-7782
rcaap.rights	openAccess	pt_PT
rcaap.type	conferenceObject	pt_PT
relation.isAuthorOfPublication	bf713e37-c17f-4a4e-8323-a7b770a038bf
relation.isAuthorOfPublication.latestForDiscovery	bf713e37-c17f-4a4e-8323-a7b770a038bf