{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T02:50:23Z","timestamp":1774493423743,"version":"3.50.1"},"reference-count":55,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2026,3,4]],"date-time":"2026-03-04T00:00:00Z","timestamp":1772582400000},"content-version":"vor","delay-in-days":3,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T00:00:00Z","timestamp":1772323200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Water Environment Research"],"published-print":{"date-parts":[[2026,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Widespread chemical\u2010enhanced phosphorus removal treatments usually result in waste activated sludge (WAS) containing excess phosphorus removal agents and byproducts. This study investigated four wastewater treatment plants (WWTPs) in China and took FeCl\n                    <jats:sub>3<\/jats:sub>\n                    as a representative agent to explore its effect on WAS organics dissolution and anaerobic digestion (AD). The results revealed a biphasic effect of Fe\n                    <jats:sup>3+<\/jats:sup>\n                    on WAS: Disintegration dominated at low concentrations (e.g., 50\u2013100\u2009mg\/L), and coagulation dominated at high concentrations (e.g., 1000\u2009mg\/L). High\u2010concentration Fe\n                    <jats:sup>3+<\/jats:sup>\n                    inhibited the AD performance by disrupting the system (pH and ORP), resulting in system acidification. Conversely, low\u2010concentration Fe\n                    <jats:sup>3+<\/jats:sup>\n                    promoted AD through synthetic effects (enhanced microbial activity and key gene expression, activated the DIR process, and mitigated acid accumulation), achieving maximum methane production at 50\u2010mg Fe\n                    <jats:sup>3+<\/jats:sup>\n                    \/L. This study enhances understanding of the effect of iron\u2010containing phosphorus removal agents on the AD of WAS and recommends a staged dosing strategy for WWTPs to optimize performance.\n                  <\/jats:p>","DOI":"10.1002\/wer.70326","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T11:42:49Z","timestamp":1772970169000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Effect of Iron\u2010Containing Phosphorus Removal Agents on Organics Dissolution and Anaerobic Digestion of Waste Activated Sludge"],"prefix":"10.1002","volume":"98","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-6809-5162","authenticated-orcid":false,"given":"Yan","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Environmental Engineering Xi'an Jiaotong University  Xi'an 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