{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T02:41:17Z","timestamp":1761964877243,"version":"build-2065373602"},"reference-count":39,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2017,5,12]],"date-time":"2017-05-12T00:00:00Z","timestamp":1494547200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"funda\u00e7\u00e3o para a ci\u00eancia e tecnologia","award":["FCT UID\/CTM\/50011\/2013","SFRH\/BD\/87758\/2012"],"award-info":[{"award-number":["FCT UID\/CTM\/50011\/2013","SFRH\/BD\/87758\/2012"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Fermentation"],"abstract":"<jats:p>In this work, hardwood sulfite spent liquor (HSSL)\u2014a by-product from a pulp and paper industry\u2014was used as substrate to produce short-chain organic acids (SCOAs) through acidogenic fermentation. SCOAs have a broad range of applications, including the production of biopolymers, bioenergy, and biological removal of nutrients from wastewaters. A continuous stirred tank reactor (CSTR) configuration was chosen to impose selective pressure conditions. The CSTR was operated for 88 days at 30 \u00b0C, without pH control, and 1.76 days of hydraulic and sludge retention times were imposed. The culture required 46 days to adapt to the conditions imposed, reaching a pseudo-steady state after this period. The maximum concentration of SCOAs produced occurred on day 71\u20147.0 g carbon oxygen demand (COD)\/L that corresponded to a degree of acidification of 36%. Acetate, propionate, butyrate, valerate, and lactate were the SCOAs produced throughout the 88 days, with an average proportion of 59:17:19:1.0:4.0%, respectively.<\/jats:p>","DOI":"10.3390\/fermentation3020020","type":"journal-article","created":{"date-parts":[[2017,5,12]],"date-time":"2017-05-12T11:03:53Z","timestamp":1494587033000},"page":"20","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Valorization of a Pulp Industry By-Product through the Production of Short-Chain Organic Acids"],"prefix":"10.3390","volume":"3","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9972-496X","authenticated-orcid":false,"given":"Diogo","family":"Queir\u00f3s","sequence":"first","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Rita","family":"Sousa","sequence":"additional","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"given":"Susana","family":"Pereira","sequence":"additional","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5802-1777","authenticated-orcid":false,"given":"Lu\u00edsa","family":"Serafim","sequence":"additional","affiliation":[{"name":"CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universit\u00e1rio de Santiago, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2017,5,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1016\/j.nbt.2013.11.003","article-title":"Biowaste biorefinery in Europe: Opportunities and research & development needs","volume":"32","author":"Fava","year":"2015","journal-title":"New Biotechnol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.cej.2013.09.002","article-title":"A review of the production and applications of waste-derived volatile fatty acids","volume":"235","author":"Lee","year":"2014","journal-title":"Chem. 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