Influence of sewage sludge conditioning with use of biomass ash on its rheological characteristics

Wójcik, Marta; Stachowicz, Feliks

doi:10.24425/aep.2019.126425

Artykuł - szczegóły

Tytuł artykułu

Influence of sewage sludge conditioning with use of biomass ash on its rheological characteristics

Autorzy

Wójcik Marta , Stachowicz Feliks

Treść / Zawartość

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Identyfikatory

DOI

10.24425/aep.2019.126425

Warianty tytułu

Wpływ kondycjonowania osadów ściekowych popiołem ze spalania biomasy na ich charakterystykę reologiczną

Języki publikacji

Abstrakty

This study presents the rheological properties of sewage sludge after conditioning with the application of biomass ash. The impact of sewage sludge pre-treatment on its viscosity, flow curves and thixotropy was investigated. The increase of shear stress and the decrease of viscosity were observed with the increase of shear rate. Obtained results were compared with raw sewage sludge and the sludge after modification by means of polyelectrolyte in the dosage of 1.5 g‧(kg d.m.)^-1. The findings proved that samples of raw and conditioned sewage sludge had thixotropic characteristics. The correlation between moisture content and capillary suction time reduction as well as selected rheological parameters were also determined. On the basis of the obtained results it was stated that the Ostwald de Vaele model best fits the experimental data.

Artykuł przedstawia wyniki badań dotyczących wpływu kondycjonowania osadów ściekowych z użyciem popiołów ze spalania biomasy na ich charakterystykę reologiczną. Zbadano lepkość oraz właściwości tiksotropowe osadów po ich kondycjonowaniu. Odnotowano wzrost naprężeń stycznych wraz ze wzrostem prędkości ścinania. Uzyskane rezultaty porównano z wynikami badań dla surowego osadu, jak i dla osadu kondycjonowanego z użyciem polielektrolitu w dawce 1,5 g(kg s.m.)^-1. Stwierdzono również, że próbki kondycjonowanych osadów ściekowych wykazują właściwości tiksotropowe. Wyznaczono również zależności pomiędzy uwodnieniem, czasem ssania kapilarnego oraz wybranymi parametrami reologicznymi osadów. Na podstawie uzyskanych rezultatów stwierdzono, że najlepsze dopasowanie wykazuje model Ostwalda de Vaele.

Słowa kluczowe

sewage sludge conditioning biomass ash thixotropy viscosity rheology

osad ściekowy kondycjonowanie popiół z biomasy tiksotropia lepkość reologia

Wydawca

Institute of Environmental Engineering, Polish Academy of Sciences

Czasopismo

Archives of Environmental Protection

Rocznik

2019

Tom

Vol. 45, no. 1

Strony

92--102

Opis fizyczny

Bibliogr. 33 poz., tab., wykr.

Twórcy

autor

Wójcik Marta

m.wojcik@prz.edu.pl

Rzeszow University of Technology, Poland, Department of Materials Forming and Processing

autor

Stachowicz Feliks

Rzeszow University of Technology, Poland, Department of Materials Forming and Processing

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).

Typ dokumentu

Bibliografia

Identyfikator YADDA

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