Print Email Facebook Twitter Synergy of phosphate recovery from sludge-incinerated ash and coagulant production by desalinated brine Title Synergy of phosphate recovery from sludge-incinerated ash and coagulant production by desalinated brine Author Wang, Xiangyang (Beijing University of Civil Engineering & Architecture) Shi, Chen (Beijing University of Civil Engineering & Architecture) Hao, Xiaodi (Beijing University of Civil Engineering & Architecture) van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology; Beijing University of Civil Engineering & Architecture) Wu, Yuanyuan (Beijing University of Civil Engineering & Architecture) Date 2023 Abstract Wet-chemical approach is widely applied for phosphate recovery from incinerated ash of waste activated sludge (WAS), along with metals removed/recovered. The high contents of both aluminum (Al) and iron (Fe) in WAS-incinerated ash should be suitable for producing coagulants with some waste anions like Cl− and SO42− With acid (HCl) leaching and metals’ removing, approximately 88 wt% of phosphorus (P) in the ash could be recovered as hydroxylapatite (HAP: Ca5(PO4)3OH); Fe3+ in the acidic leachate could be selectively removed/recovered by extraction with an organic solvent of tributyl phosphate (TBP), and thus a FeCl3-based coagulant could be synthesized by stripping the raffinate with the original brine (containing abundant Cl− and SO42−). Furthermore, a liquid poly-aluminum chloride (PAC)-based coagulant could also be synthesized with Al3+ removed from the ash and the brine, which behaved almost the same in the coagulation performance as a commercial coagulant on both phosphate and turbidity removals. Both P-recovery from the ash and coagulant production associated with the brine would enlarge the markets of both ‘blue’ phosphate and ‘green’ coagulants. Subject AshCoagulantsIncinerationMetals’ recoveryPhosphorus recoveryWaste activated sludge (WAS) To reference this document use: http://resolver.tudelft.nl/uuid:5061f633-d256-4526-9c61-d55a5f147011 DOI https://doi.org/10.1016/j.watres.2023.119658 Embargo date 2023-07-23 ISSN 0043-1354 Source Water Research, 231 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Xiangyang Wang, Chen Shi, Xiaodi Hao, Mark C.M. van Loosdrecht, Yuanyuan Wu Files PDF 1_s2.0_S0043135423000933_main.pdf 2.38 MB Close viewer /islandora/object/uuid:5061f633-d256-4526-9c61-d55a5f147011/datastream/OBJ/view