{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T01:36:14Z","timestamp":1780450574799,"version":"3.54.1"},"reference-count":48,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2022,11,16]],"date-time":"2022-11-16T00:00:00Z","timestamp":1668556800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Jiangsu Postgraduate Practice Innovation Plan, Suzhou University of Science and Technology","award":["SJCX21-1406"],"award-info":[{"award-number":["SJCX21-1406"]}]},{"name":"Jiangsu Postgraduate Practice Innovation Plan, Suzhou University of Science and Technology","award":["51938010"],"award-info":[{"award-number":["51938010"]}]},{"name":"Natural Science Foundation of China","award":["SJCX21-1406"],"award-info":[{"award-number":["SJCX21-1406"]}]},{"name":"Natural Science Foundation of China","award":["51938010"],"award-info":[{"award-number":["51938010"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Potassium ferrate has strong oxidation in both acid and alkali environments, which has attracted extensive attention. However, the impact of the pH environment on this coupling process with the goal of resource recovery has not received attention. Under the goal of the efficient recovery of organic acid, the changes of solid\u2013liquid characteristics of sludge after acid and alkaline ferrate pretreatment and during anaerobic digestion were discussed. The results showed that compared with blank control groups, after alkaline ferrate pretreatment, the volatile suspended solids (VSSs) decreased the most, reaching 28.19%. After being pretreated with alkaline ferrate, the sludge showed the maximum VFA accumulation (408.21 COD\/g VSS) on the third day of digestion, which was 1.34 times higher than that of the acid ferrate pretreatment. Especially in an alkaline environment, there is no need to add additional alkaline substances to adjust the pH value, and the effect of sludge reduction and acid production is the best.<\/jats:p>","DOI":"10.3390\/ijerph192215093","type":"journal-article","created":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T03:12:20Z","timestamp":1668654740000},"page":"15093","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Effect of Different Acid and Base Potassium Ferrate Pretreatment on Organic Acid Recovery by Anaerobic Digestion of Sludge"],"prefix":"10.3390","volume":"19","author":[{"given":"Mengjia","family":"Tian","sequence":"first","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feng","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"},{"name":"Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiawen","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Li","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mao","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang","family":"Li","sequence":"additional","affiliation":[{"name":"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China"},{"name":"Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China"},{"name":"State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"787","DOI":"10.1016\/j.cej.2014.08.048","article-title":"Enhanced production of methane from waste activated sludge by the combination of high-solid anaerobic digestion and microbial electrolysis cell with iron-graphite electrode","volume":"259","author":"Feng","year":"2015","journal-title":"Chem. 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