| Title | Strong minimization of biological sludge production and enhancement of phosphorus bioavailability with a thermophilic biological fluidized bed reactor |
|---|---|
| ID_Doc | 26731 |
| Authors | Collivignarelli, MC; Abbà, A; Miino, MC; Caccamo, FM; Argiolas, S; Bellazzi, S; Baldi, M; Bertanza, G |
| Title | Strong minimization of biological sludge production and enhancement of phosphorus bioavailability with a thermophilic biological fluidized bed reactor |
| Year | 2021 |
| Published | |
| Abstract | Identify sustainable biological sewage sludge (BSS) management represents a current challenge. In this work, pre-thickened BSS taken from a large-scale urban wastewater treatment plant (WWTP) was fed continuously for about 9 months to a semi-industrial scale thermophilic biological fluidized bed reactor (TBFBR) operating in alternate conditions. The BSS treated in TBFBR was strongly reduced (89-92%) and the production was evaluated in 0.0007-0.0023 kg kg(CODremoved)(-1) d(-1) and 0.0004-0.0014 kg kg(CODremoved)(-1) d(-1) of TS and VS, respectively. The 92% of the P-PO43- and P-org precipitated in inorganic form and accumulated in thermophilic biological sludge (TBS). In basic soils with chelating activity, phosphorus contained in TBS presented a higher bioavailability (84.0 +/- 25.3%) with respect to untreated sludge. The analysis of four diverse scenarios highlighted that TBFBR located after pre-thickening could save 73-96% of operating costs with respect to current situation. (C) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. |
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