Sodium pyrophosphate-mediated deconstruction of divalent cation bridging for impairing sewer sludge adhesion: in-situ self-cleaning by gravity sewage flow
文献类型：期刊论文
| 作者 | Pang, Heliang4,5; Chen, Xiyi5; Wei, Qiao3,5; Li, Xingwang5; Xu, Huining5; Wang, Chunwei5; Liu, Yong2; Wang, Jun1; Zhang, Bo1; Lu, Jinsuo5 |
| 刊名 | ENGINEERING ENVIRONMENT
 |
| 出版日期 | 2026-01-10 |
| 卷号 | 20期号:2页码:15 |
| 关键词 | Sewer sludge Sodium pyrophosphate Extracellular polymeric substances Gelatinous structure |
| ISSN号 | 3091-5058 |
| DOI | 10.1007/s11783-026-2132-x |
| 通讯作者 | Lu, Jinsuo(lujinsuo@xauat.edu.cn) |
| 英文摘要 | Extracellular polymeric substances (EPS) play a crucial role in maintaining the colloidal structure of sewer sludge, which can lead to significant siltation in sewage systems. In this study, a sodium pyrophosphate (SP)-mediated divalent cation chelation strategy was proposed for disrupting divalent cation bridging and macromolecular material entanglement in EPS structure in sewer sludge to achieve adhesion degradation. At the SP dosage of 0.25 g/g TS, the total amount of extractable EPS was found to have increased 2.17 times significantly, accompanied by disruption and outward migration of gelatinous EPS. Concurrently, the functional groups transfer of macromolecules and the structural transformation of aromatic proteins were initiated. In this instance, the microbial cells were lysed, facilitating the molecular deconstruction and solubilization of aromatic proteins, humic acids and carbohydrates. The deterioration of the EPS network and the breakdown of gelatinous biopolymers resulted in significantly reduced sludge cohesion. As a consequence, the mean adhesion force decreased from 4.00 to 2.37 nN, while the total suspended solids (TSS) concentration in the effluent increased by 48.59 times, indicating substantial sludge dissolution and flotation. The loss of divalent cation bridging further increased the surface electronegativity of the sludge matrix, reducing its resistance to hydraulic erosion. In this case, sewer sludge particles could be transported downstream by gravity scouring of the effluent flow. This study demonstrates the feasibility of SP-mediated EPS disruption as an effective in-situ self-cleaning strategy for sewer system management, providing a sustainable solution for mitigating siltation and improving sewer hydraulic efficiency. |
| WOS关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES ; ACTIVATED-SLUDGE ; SEDIMENTATION ; ADSORPTION ; STABILITY ; SULFIDE ; EPS |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001709870300007 |
| 资助机构 | Shaanxi Key Research and Development Program ; National Natural Science Foundation of China ; Shaanxi Province Science Fund for Distinguished Young Scholars, China |
| 源URL | [http://ir.yic.ac.cn/handle/133337/42243]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Lu, Jinsuo |
| 作者单位 | 1.Xian Water Grp Planning & Design Res Inst Co Ltd, Xian 710082, Peoples R China 2.Xian Drainage Grp Co Ltd, Xian 710061, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China 4.Harbin Inst Technol, State Key Lab Urban Water Resource & Environm SKLU, Harbin 150090, Peoples R China 5.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Shaanxi Key Lab Environm Engn, Xian 710055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pang, Heliang,Chen, Xiyi,Wei, Qiao,et al. Sodium pyrophosphate-mediated deconstruction of divalent cation bridging for impairing sewer sludge adhesion: in-situ self-cleaning by gravity sewage flow[J]. ENGINEERING ENVIRONMENT,2026,20(2):15. |
| APA | Pang, Heliang.,Chen, Xiyi.,Wei, Qiao.,Li, Xingwang.,Xu, Huining.,...&Lu, Jinsuo.(2026).Sodium pyrophosphate-mediated deconstruction of divalent cation bridging for impairing sewer sludge adhesion: in-situ self-cleaning by gravity sewage flow.ENGINEERING ENVIRONMENT,20(2),15. |
| MLA | Pang, Heliang,et al."Sodium pyrophosphate-mediated deconstruction of divalent cation bridging for impairing sewer sludge adhesion: in-situ self-cleaning by gravity sewage flow".ENGINEERING ENVIRONMENT 20.2(2026):15. |
入库方式： OAI收割
来源：烟台海岸带研究所
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