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-PO₄^3- 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.

确定可持续的生物污水污泥 (BSS) 管理代表了当前的挑战。在这项工作中，从大型城市污水处理厂 (WWTP) 中提取的预稠化 BSS 连续供入约 9 个月的半工业规模嗜热生物流化床反应器 (TBFBR)，该反应器在交替条件下运行。在 TBFBR 中处理的 BSS 大大减少 (89-92%)，并且分别在 0.0007-0.0023 kg _CODremoved ^-1 d ^-1和 0.0004-0.0014 kg _CODremoved ^-1 d ^-1的 TS 和 VS中评估了产量。92% 的 P-PO ₄ ^3-和 P-org 以无机形式沉淀并积累在嗜热生物污泥 (TBS) 中。在具有螯合活性的碱性土壤中，与未经处理的污泥相比，TBS 中所含的磷具有更高的生物利用率 (84.0 ± 25.3%)。对四种不同场景的分析表明，与当前情况相比，预稠化后的 TBFBR 可以节省 73-96% 的运营成本。