Influence of Heavy Metals on the Rheology of a Thermophilic Biological Sludge for nutrients Recovery: Effect of Iron, Copper, and Aluminium on Fluid Consistency

Currently, thermophilic membrane biological reactors (TMBRs) are used to treat industrial wastewaters and biological sewage sludge with the aim of nutrients recovery. The performance of the biological process is strongly influenced by rheological behaviour of the thermophilic biological sludge (TBS)...

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Bibliographic Details
Published in:Waste and biomass valorization 2023-08, Vol.14 (8), p.2495-2504
Main Authors: Collivignarelli, Maria Cristina, Bellazzi, Stefano, Carnevale Miino, Marco, Caccamo, Francesca Maria, Calatroni, Silvia, Durante, Angela, Baldi, Marco
Format: Article
Language:English
Subjects:
Aluminum
Biological activity
Bioreactors
Conditioning
Consistency
Copper
Engineering
Environment
Environmental Engineering/Biotechnology
Heavy metals
Industrial Pollution Prevention
Industrial wastewater
Iron
Metal concentrations
Newtonian fluids
Nutrients
Original Paper
Reactors
Recovery
Renewable and Green Energy
Rheological properties
Rheology
Sewage sludge
Sludge
Waste Management/Waste Technology
Wastewater treatment
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Summary:Currently, thermophilic membrane biological reactors (TMBRs) are used to treat industrial wastewaters and biological sewage sludge with the aim of nutrients recovery. The performance of the biological process is strongly influenced by rheological behaviour of the thermophilic biological sludge (TBS) inside the reactor. Considering the high concentration of heavy metals in matrices fed to the reactors, this work aims to evaluate the influence of heavy metal types and concentration on rheological properties of TBS. Sludge has been extracted from a full-scale TMBR and conditioned with Fe 3+ , Cu 2+ , and Al 3+ . Rheological measures have been conducted and constants k and n of Herschel–Bulkley model were used to define the rheological properties of TBS. Rheological properties of high consistency TBS (0.06 ≤ k 0  
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-022-01928-1