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Strong minimization of biological sludge production and enhancement of phosphorus bioavailability with a thermophilic biological fluidized bed reactor
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.psep.2021.09.026
Maria Cristina Collivignarelli 1, 2 , Alessandro Abbà 3 , Marco Carnevale Miino 1 , Francesca Maria Caccamo 1 , Stefano Argiolas 1 , Stefano Bellazzi 1 , Marco Baldi 4 , Giorgio Bertanza 3
Affiliation  

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 kgCODremoved −1 d−1 and 0.0004–0.0014 kg kgCODremoved −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.



中文翻译:

使用高温生物流化床反应器最大限度地减少生物污泥的产生并提高磷的生物利用度

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。

更新日期:2021-09-29
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