{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T23:09:38Z","timestamp":1767827378694,"version":"3.49.0"},"reference-count":38,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,7,5]],"date-time":"2022-07-05T00:00:00Z","timestamp":1656979200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Funds by FCT\u2014Portuguese Foundation for Science and Technology","award":["UIDB\/04033\/2020"],"award-info":[{"award-number":["UIDB\/04033\/2020"]}]},{"name":"National Funds by FCT\u2014Portuguese Foundation for Science and Technology","award":["PROJ\/IPV\/ID&I\/019"],"award-info":[{"award-number":["PROJ\/IPV\/ID&I\/019"]}]},{"name":"National Funds by FCT\u2014Portuguese Foundation for Science and Technology","award":["PDR2020-1.0.1-FEADER-032314"],"award-info":[{"award-number":["PDR2020-1.0.1-FEADER-032314"]}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/04033\/2020"],"award-info":[{"award-number":["UIDB\/04033\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["PROJ\/IPV\/ID&I\/019"],"award-info":[{"award-number":["PROJ\/IPV\/ID&I\/019"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["PDR2020-1.0.1-FEADER-032314"],"award-info":[{"award-number":["PDR2020-1.0.1-FEADER-032314"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Polytechnic Institute of Viseu","award":["UIDB\/04033\/2020"],"award-info":[{"award-number":["UIDB\/04033\/2020"]}]},{"name":"Polytechnic Institute of Viseu","award":["PROJ\/IPV\/ID&I\/019"],"award-info":[{"award-number":["PROJ\/IPV\/ID&I\/019"]}]},{"name":"Polytechnic Institute of Viseu","award":["PDR2020-1.0.1-FEADER-032314"],"award-info":[{"award-number":["PDR2020-1.0.1-FEADER-032314"]}]},{"name":"Minist\u00e9rio da Agricultura","award":["UIDB\/04033\/2020"],"award-info":[{"award-number":["UIDB\/04033\/2020"]}]},{"name":"Minist\u00e9rio da Agricultura","award":["PROJ\/IPV\/ID&I\/019"],"award-info":[{"award-number":["PROJ\/IPV\/ID&I\/019"]}]},{"name":"Minist\u00e9rio da Agricultura","award":["PDR2020-1.0.1-FEADER-032314"],"award-info":[{"award-number":["PDR2020-1.0.1-FEADER-032314"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Agronomy"],"abstract":"<jats:p>The treatment of animal slurry is used to improve management on a farm scale. The aim of this laboratory study was to assess the effects of the addition of the additives biochar, alum and clinoptilolite before the mechanical separation of whole pig slurry (WS) on the characteristics and emission of NH3, N2O, CO2 and CH4 from solid (SF) and liquid fractions (LF). The additives were mixed with WS (5% w\/w), followed by separation, in a total of 12 treatments with 3 replicates, including the controls and WS with additives. Gaseous emissions were measured for 30 d by a photoacoustic multigas monitor, and initial characteristics of the slurries were assessed. The results indicated that the separation of the WS modified the initial physicochemical characteristics and increased the GWP emissions of the SF and LF, but not the NH3 losses. However, the addition of additives before separation increased the nutrient value and reduced the GWP emissions from the SF and LF. Additionally, just the additive alum was effective in the reduction of E. coli. The additives led to significant reductions in NH3 and N2O emissions, with higher reductions in NH3 losses for alum (51% for NH3) and similar N2O losses for all additives (70% for N2O) observed, whereas the CO2 and CH4 emissions were reduced by biochar (25% for CO2 and 50% for CH4) and alum (33% for CO2 and 30% for CH4) but not by clinoptilolite. Although the additives had a positive effect on slurry management, it can be concluded that the addition of alum before mechanical separation has the potential to be the best mitigation measure because it improves the nutrient content and sanitation and decreases gaseous losses from slurry management.<\/jats:p>","DOI":"10.3390\/agronomy12071618","type":"journal-article","created":{"date-parts":[[2022,7,5]],"date-time":"2022-07-05T10:21:33Z","timestamp":1657016493000},"page":"1618","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Effects of the Addition of Different Additives before Mechanical Separation of Pig Slurry on Composition and Gaseous Emissions"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8078-8915","authenticated-orcid":false,"given":"Jos\u00e9 L. S.","family":"Pereira","sequence":"first","affiliation":[{"name":"Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500-606 Viseu, Portugal"},{"name":"Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Tr\u00e1s-os-Montes and Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6080-7760","authenticated-orcid":false,"given":"Adelaide","family":"Perdig\u00e3o","sequence":"additional","affiliation":[{"name":"Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500-606 Viseu, Portugal"},{"name":"Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Tr\u00e1s-os-Montes and Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal"},{"name":"CERNAS-IPV Research Centre, Polytechnic Institute of Viseu, Campus Polit\u00e9cnico, Repeses, 3504-510 Viseu, Portugal"}]},{"given":"Ana","family":"Tavares","sequence":"additional","affiliation":[{"name":"Centre for Research in Digital Services (CISeD), School of Technology and Management of Viseu, Polytechnic Institute of Viseu, Campus Polit\u00e9cnico de Repeses, 3504-510 Viseu, Portugal"}]},{"given":"Maria E. F.","family":"Silva","sequence":"additional","affiliation":[{"name":"Centre for Research in Digital Services (CISeD), School of Technology and Management of Viseu, Polytechnic Institute of Viseu, Campus Polit\u00e9cnico de Repeses, 3504-510 Viseu, Portugal"},{"name":"Laboratory for Process Engineering, Environment, Biotechnology and Energy (LEPABE), Faculty of Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2252-381X","authenticated-orcid":false,"given":"Isabel","family":"Br\u00e1s","sequence":"additional","affiliation":[{"name":"Centre for Research in Digital Services (CISeD), School of Technology and Management of Viseu, Polytechnic Institute of Viseu, Campus Polit\u00e9cnico de Repeses, 3504-510 Viseu, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4077-0897","authenticated-orcid":false,"given":"Dulcineia F.","family":"Wessel","sequence":"additional","affiliation":[{"name":"Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500-606 Viseu, Portugal"},{"name":"QOPNA and LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5070","DOI":"10.2527\/jas.2013-6584","article-title":"Mitigation of methane and nitrous oxide emissions from animal operations: II. 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