20.500.12556/RUL-167504 Integrated chelator-based removal of toxic metals and aerobic digestion of sewage sludge The treatment of sewage sludge (SS) is one of the biggest challenges due to its large output and contamination with toxic metals (TMs). SS is also a potential resource for P, a strategic macronutrient in agriculture. The feasibility of integrated removal of TMs from SS by chelation and washing with ethylenediaminetetraacetate (EDTA) and SS solids reduction by aerobic digestion in bioreactors was investigated. In three consecutive SS treatment batches, an average of 70, 40 and 59% of Zn, Cu and Pb were removed. Cr was not chelated and remained in the SS. EDTA persisted during the aerobic digestion of SS and was efficiently recycled (82% on average) in the pH gradient 12.5 - 2 (ReSoil® method) and reused in the next batch. The reduction of SS solids (on average 18.4% in 6 days) was more efficient with EDTA than with the control treatment (7.4%). The integrated process also increased the concentration of plant-available P in the washed SS by an average of 1.6-fold compared to the control. EDTA induced fragmentation of SS. This resulted in a loss of SS dry matter (on average 26.1%) and total P (on average 24.6%). The novel integrated process efficiently removed TMs that chelate with EDTA, is scalable and should be compatible with current processes in wastewater treatment plants. sewage sludge toxic metals phosphorus ethylenediaminetetraacetate aerobic digestion ReSoil® blato komunalnih čistilnih naprav potencialno strupene kovine toksične snovi fosfor aerobna obdelava aerobna razgradnja EDTA true false true Angleški jezik Slovenski jezik Članek v reviji 2025-02-25 12:26:30 2025-02-25 12:26:37 2025-03-12 03:53:50 0000-00-00 00:00:00 2025 0 0 9 str. art. 145047 Vol. 495 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.3:502.175 0959-6526 10.1016/j.jclepro.2025.145047 227243523 1-s2.0-S095965262500397X-main.pdf 1-s2.0-S095965262500397X-main.pdf 1 2882DFA6D76CCDF33EE1598383243E8E 2a505d29f86edfc7e23fae50b1de15359a9091c5d3950ab190773d62ebe64033 5f80e29a-fe82-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200533 https://www.sciencedirect.com/science/article/pii/S095965262500397X 1 760e97fe-f36a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200061 Biotehniška fakulteta 0 0 0