Yingyun Chen , Yanwei Liu , Yadong Zhao , Nanfei Geng , Jan Baeyens , Shaojie Wang , Haijia Su
{"title":"高盐度和波动C/N比条件下,fe3o4介导的好氧颗粒污泥调控:海产品加工废水处理的机制和意义","authors":"Yingyun Chen , Yanwei Liu , Yadong Zhao , Nanfei Geng , Jan Baeyens , Shaojie Wang , Haijia Su","doi":"10.1016/j.envres.2025.122257","DOIUrl":null,"url":null,"abstract":"<div><div>To address the poor performance of aerobic granular sludge (AGS) in the treatment of seafood processing wastewater with high salinity and fluctuating C/N ratio, this study explored an exogenous Fe<sub>3</sub>O<sub>4</sub> dosing strategy to stimulate the stress response. The results showed that 1.5 g/L Fe<sub>3</sub>O<sub>4</sub> stimulated the secretion of more hydrophobic aromatic proteins and viscous polysaccharides in AGS at a salinity of 35 gNaCl/L and the C/N ratio increased from 10 to 20 and then decreased to 10 and 5, effectively inhibiting the shedding of bacterial consortia from granules. The improved electron transport efficiency guaranteed a high metabolic rate for microorganisms. Meanwhile, the enrichment of <em>Glutamicibacter</em> and <em>Ferruginibacter</em> played an important role in response to high salt and fluctuating C/N stresses. Fe<sub>3</sub>O<sub>4</sub> was found to upregulate the expression of functional genes associated with nitrogen conversion. This study provided new insights to improve the robustness of AGS in seafood processing wastewater treatment.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122257"},"PeriodicalIF":7.7000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fe3O4-mediated regulation of aerobic granular sludge under high salinity and fluctuating C/N ratio: Mechanisms and implications for seafood processing wastewater treatment\",\"authors\":\"Yingyun Chen , Yanwei Liu , Yadong Zhao , Nanfei Geng , Jan Baeyens , Shaojie Wang , Haijia Su\",\"doi\":\"10.1016/j.envres.2025.122257\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>To address the poor performance of aerobic granular sludge (AGS) in the treatment of seafood processing wastewater with high salinity and fluctuating C/N ratio, this study explored an exogenous Fe<sub>3</sub>O<sub>4</sub> dosing strategy to stimulate the stress response. The results showed that 1.5 g/L Fe<sub>3</sub>O<sub>4</sub> stimulated the secretion of more hydrophobic aromatic proteins and viscous polysaccharides in AGS at a salinity of 35 gNaCl/L and the C/N ratio increased from 10 to 20 and then decreased to 10 and 5, effectively inhibiting the shedding of bacterial consortia from granules. The improved electron transport efficiency guaranteed a high metabolic rate for microorganisms. Meanwhile, the enrichment of <em>Glutamicibacter</em> and <em>Ferruginibacter</em> played an important role in response to high salt and fluctuating C/N stresses. Fe<sub>3</sub>O<sub>4</sub> was found to upregulate the expression of functional genes associated with nitrogen conversion. This study provided new insights to improve the robustness of AGS in seafood processing wastewater treatment.</div></div>\",\"PeriodicalId\":312,\"journal\":{\"name\":\"Environmental Research\",\"volume\":\"284 \",\"pages\":\"Article 122257\"},\"PeriodicalIF\":7.7000,\"publicationDate\":\"2025-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0013935125015087\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013935125015087","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Fe3O4-mediated regulation of aerobic granular sludge under high salinity and fluctuating C/N ratio: Mechanisms and implications for seafood processing wastewater treatment
To address the poor performance of aerobic granular sludge (AGS) in the treatment of seafood processing wastewater with high salinity and fluctuating C/N ratio, this study explored an exogenous Fe3O4 dosing strategy to stimulate the stress response. The results showed that 1.5 g/L Fe3O4 stimulated the secretion of more hydrophobic aromatic proteins and viscous polysaccharides in AGS at a salinity of 35 gNaCl/L and the C/N ratio increased from 10 to 20 and then decreased to 10 and 5, effectively inhibiting the shedding of bacterial consortia from granules. The improved electron transport efficiency guaranteed a high metabolic rate for microorganisms. Meanwhile, the enrichment of Glutamicibacter and Ferruginibacter played an important role in response to high salt and fluctuating C/N stresses. Fe3O4 was found to upregulate the expression of functional genes associated with nitrogen conversion. This study provided new insights to improve the robustness of AGS in seafood processing wastewater treatment.
期刊介绍:
The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.