DOI: 10.1016/j.watres.2018.01.006
Scopus记录号: 2-s2.0-85041376611
论文题名: Experimental rheological procedure adapted to pasty dewatered sludge up to 45 % dry matter
作者: Mouzaoui M. ; Baudez J.C. ; Sauceau M. ; Arlabosse P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 133 起始页码: 1
结束页码: 7
语种: 英语
英文关键词: Dilatancy
; Fracture
; Pasty sludge
; Restructuration
; Rheology
; Viscoelasticity
Scopus关键词: Fracture
; Hydrodynamics
; Rheology
; Viscoelasticity
; Dilatancy
; Effective material property
; Experimental procedure
; Hydrodynamic modelling
; Pasty sludge
; Restructuration
; Rheological characterization
; Solids concentrations
; Dewatering
; concentration (composition)
; dewatering
; dry matter
; experimental study
; fracture
; hydrodynamics
; rheology
; sludge
; viscoelasticity
; Article
; concentration (parameters)
; flow measurement
; hydrodynamics
; molecular stability
; pasty dewatered sludge
; physical parameters
; priority journal
; reproducibility
; shear rate
; shear stress
; sludge dewatering
; solid
; surface property
; torque
; viscoelasticity
; water flow
; Young modulus
; chemistry
; desiccation
; flow kinetics
; sewage
; Desiccation
; Reproducibility of Results
; Rheology
; Sewage
英文摘要: Wastewater sludge are characterized by complex rheological properties, strongly dependent on solids concentration and temperature. These properties are required for process hydrodynamic modelling but their correct measurement is often challenging at high solids concentrations. This is especially true to model the hydrodynamic of dewatered sludge during drying process where solids content (TS) increases with residence time. Indeed, until now, the literature mostly focused on the rheological characterization of sludge at low and moderate TS (between 4 and 8%). Limited attention was paid to pasty and highly concentrated sludge mainly because of the difficulties to carry out the measurements. Results reproducibility appeared to be poor and thus may not be always fully representative of the effective material properties. This work demonstrates that reproducible results can be obtained by controlling cracks and fractures which always take place in classical rotational rheometry. In that purpose, a well-controlled experimental procedure has been developed, allowing the exact determination of the surface effectively sheared. This surface is calculated by scattering a classical stress sweep with measurements at a reference strain value. The implementation of this procedure allows the correct determination of solid-like characteristics from 20 to 45% TS but also shows that pasty and highly concentrated sludge highlight normal forces caused by dilatancy. Moreover the surface correction appears to be independent of TS in the studied range. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112944
Appears in Collections: 气候减缓与适应
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作者单位: Irstea, UR TSCF, Domaine des Palaquins, Montoldre, F-03150, France; Université de Toulouse, Mines Albi, CNRS, Centre RAPSODEE, Campus Jarlard, Albi, F-81013, France; LIST Environmental Research and Innovation Department, 41 rue du Brill, Belvaux, L-4422, Luxembourg
Recommended Citation:
Mouzaoui M.,Baudez J.C.,Sauceau M.,et al. Experimental rheological procedure adapted to pasty dewatered sludge up to 45 % dry matter[J]. Water Research,2018-01-01,133