Caihong Liu , Jingjun Bo , Zhen Tao , Jingmei Yao , Haiqing Chang , Qianliang Liu , Xiaoqing Zhao , Qiang He
{"title":"调节生物过滤和捕食触发重力驱动膜系统:生物膜转化和膜效率","authors":"Caihong Liu , Jingjun Bo , Zhen Tao , Jingmei Yao , Haiqing Chang , Qianliang Liu , Xiaoqing Zhao , Qiang He","doi":"10.1016/j.memsci.2025.124364","DOIUrl":null,"url":null,"abstract":"<div><div>The gravity-driven membrane (GDM) system provides decentralized water treatment by utilizing the formation of a biofilm to sustain stable flux. Our study systematically investigated the individual and combined effects of biofiltration (powdered activated carbon, PAC) and predation (oligochaete T. Tubifex) in GDM systems through four groups: PES, PES@TT, PES/PAC and combined PES/PAC@TT, revealing novel insights into biofilm system optimization. Compared with the pristine PES group (UV<sub>254</sub>: 3.87%; TOC: 32.37%), T. Tubifex alone increased stable flux by 20.35% and improved removal efficacy (UV<sub>254</sub>: 33.04%; TOC: 42.26%), marking the first demonstration of its viability as a bio-tool in GDM systems. Its unique “upward mover” behavior (tail-up, head-down) enhanced biofilm porosity and eukaryotic predation through bio-irrigation and bioturbation, effectively balancing flux stability with water quality. Similarly, PAC pre-deposition alone enhanced flux by 45.93% and achieved superior pollutant removal (UV<sub>254</sub>: 89.94%; TOC: 60.86%) by fostering microbial enrichment and biofilm heterogeneity. By pre-depositing PAC to establish a mature biofouling layer and subsequently introducing T. Tubifex, we demonstrated that sequential application maintained high pollutant removal (UV<sub>254</sub>: 84.13%; TOC: 50.16%). However, the physical presence of the PAC restricted predator movement and predation, causing late-stage mortality and biofilm densification, which reduced stable flux by 10%. Our findings demonstrate that adsorbents and non-native predators can regulate biofouling layer composition and structure, enhancing both flux and water treatment efficiency. By linking biofiltration and predation to biofilm dynamics, optimization of predator-absorber pairing and operational sequence to take advantage of ecological synergies, offers actionable insights for scalable water treatment solutions.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"733 ","pages":"Article 124364"},"PeriodicalIF":8.4000,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regulating biofiltration and predation to trigger gravity-driven membrane System: Biofilm transformation and membrane efficiency\",\"authors\":\"Caihong Liu , Jingjun Bo , Zhen Tao , Jingmei Yao , Haiqing Chang , Qianliang Liu , Xiaoqing Zhao , Qiang He\",\"doi\":\"10.1016/j.memsci.2025.124364\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The gravity-driven membrane (GDM) system provides decentralized water treatment by utilizing the formation of a biofilm to sustain stable flux. Our study systematically investigated the individual and combined effects of biofiltration (powdered activated carbon, PAC) and predation (oligochaete T. Tubifex) in GDM systems through four groups: PES, PES@TT, PES/PAC and combined PES/PAC@TT, revealing novel insights into biofilm system optimization. Compared with the pristine PES group (UV<sub>254</sub>: 3.87%; TOC: 32.37%), T. Tubifex alone increased stable flux by 20.35% and improved removal efficacy (UV<sub>254</sub>: 33.04%; TOC: 42.26%), marking the first demonstration of its viability as a bio-tool in GDM systems. Its unique “upward mover” behavior (tail-up, head-down) enhanced biofilm porosity and eukaryotic predation through bio-irrigation and bioturbation, effectively balancing flux stability with water quality. Similarly, PAC pre-deposition alone enhanced flux by 45.93% and achieved superior pollutant removal (UV<sub>254</sub>: 89.94%; TOC: 60.86%) by fostering microbial enrichment and biofilm heterogeneity. By pre-depositing PAC to establish a mature biofouling layer and subsequently introducing T. Tubifex, we demonstrated that sequential application maintained high pollutant removal (UV<sub>254</sub>: 84.13%; TOC: 50.16%). However, the physical presence of the PAC restricted predator movement and predation, causing late-stage mortality and biofilm densification, which reduced stable flux by 10%. Our findings demonstrate that adsorbents and non-native predators can regulate biofouling layer composition and structure, enhancing both flux and water treatment efficiency. By linking biofiltration and predation to biofilm dynamics, optimization of predator-absorber pairing and operational sequence to take advantage of ecological synergies, offers actionable insights for scalable water treatment solutions.</div></div>\",\"PeriodicalId\":368,\"journal\":{\"name\":\"Journal of Membrane Science\",\"volume\":\"733 \",\"pages\":\"Article 124364\"},\"PeriodicalIF\":8.4000,\"publicationDate\":\"2025-06-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Membrane Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0376738825006775\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0376738825006775","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Regulating biofiltration and predation to trigger gravity-driven membrane System: Biofilm transformation and membrane efficiency
The gravity-driven membrane (GDM) system provides decentralized water treatment by utilizing the formation of a biofilm to sustain stable flux. Our study systematically investigated the individual and combined effects of biofiltration (powdered activated carbon, PAC) and predation (oligochaete T. Tubifex) in GDM systems through four groups: PES, PES@TT, PES/PAC and combined PES/PAC@TT, revealing novel insights into biofilm system optimization. Compared with the pristine PES group (UV254: 3.87%; TOC: 32.37%), T. Tubifex alone increased stable flux by 20.35% and improved removal efficacy (UV254: 33.04%; TOC: 42.26%), marking the first demonstration of its viability as a bio-tool in GDM systems. Its unique “upward mover” behavior (tail-up, head-down) enhanced biofilm porosity and eukaryotic predation through bio-irrigation and bioturbation, effectively balancing flux stability with water quality. Similarly, PAC pre-deposition alone enhanced flux by 45.93% and achieved superior pollutant removal (UV254: 89.94%; TOC: 60.86%) by fostering microbial enrichment and biofilm heterogeneity. By pre-depositing PAC to establish a mature biofouling layer and subsequently introducing T. Tubifex, we demonstrated that sequential application maintained high pollutant removal (UV254: 84.13%; TOC: 50.16%). However, the physical presence of the PAC restricted predator movement and predation, causing late-stage mortality and biofilm densification, which reduced stable flux by 10%. Our findings demonstrate that adsorbents and non-native predators can regulate biofouling layer composition and structure, enhancing both flux and water treatment efficiency. By linking biofiltration and predation to biofilm dynamics, optimization of predator-absorber pairing and operational sequence to take advantage of ecological synergies, offers actionable insights for scalable water treatment solutions.
期刊介绍:
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.