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Strong minimization of biological sludge production and enhancement of phosphorus bioavailability with a thermophilic biological fluidized bed reactor.
- Source :
-
Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B . Nov2021, Vol. 155, p262-276. 15p. - Publication Year :
- 2021
-
Abstract
- [Display omitted] 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-PO 4 3- 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09575820
- Volume :
- 155
- Database :
- Academic Search Index
- Journal :
- Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B
- Publication Type :
- Academic Journal
- Accession number :
- 153659113
- Full Text :
- https://doi.org/10.1016/j.psep.2021.09.026