Muscarella Sofia Maria, Di Trapani Daniele, Laudicina Vito Armando, Mannina Giorgio
Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Building 4, 90128, Palermo, Italy.
Department of Engineering, University of Palermo, Viale delle Scienze, Building 8, 90128, Palermo, Italy.
Heliyon. 2024 Jul 16;10(14):e34659. doi: 10.1016/j.heliyon.2024.e34659. eCollection 2024 Jul 30.
The present study used bench scale columns filled with biochar for phosphorous (P) recovery from real ultrafiltered wastewater. No studies are available about the potentiality of biochar using ultrafiltered real wastewater. Therefore, this study aimed to assess phosphate (PO ) recovery by biochar-packed columns employing real treated wastewater from an ultrafiltration process. Three flow rates were tested, specifically 0.7, 1.7 and 2.3 L h, to gain insights into the optimal working conditions. Results revealed that the maximum amount of PO recovery (namely, 3.43 mg g biochar) can be achieved after 7 h by employing the highest tested flow rate. Furthermore, the phosphorus exchange capacity (PEC) was inversely correlated with the feeding flow rate (FFR), with PEC values equal to 35, 25 and 9 % for FFR of 0.67, 1.7 and 2.3 L h, respectively. The pseudo-first order model best approximated the adsorption kinetics, thus suggesting that the adsorption of phosphate by biochar depends on its concentrations (i.e. physiosorption mechanism).
本研究使用填充生物炭的实验室规模柱从实际超滤废水中回收磷（P）。目前尚无关于使用超滤实际废水的生物炭潜力的研究。因此，本研究旨在评估采用超滤工艺处理后的实际废水，通过填充生物炭的柱体回收磷酸盐（PO₄³⁻）的情况。测试了三种流速，分别为0.7、1.7和2.3 L/h，以深入了解最佳工作条件。结果表明，采用最高测试流速时，7小时后可实现最大PO₄³⁻回收量（即3.43 mg/g生物炭）。此外，磷交换容量（PEC）与进料流速（FFR）呈负相关，FFR为0.67、1.7和2.3 L/h时，PEC值分别为35%、25%和9%。伪一级模型最能拟合吸附动力学，这表明生物炭对磷酸盐的吸附取决于其浓度（即物理吸附机制）。
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