Phosphate recovery from wastewater via vivianite crystallization using separable ferrous modified biochar beads

Wang, Yiwen; Li, Hanbing; Zhao, Yawen; Qi, Man; Wang, Li; Feng, Jiangtao

doi:10.1016/j.cej.2024.155453

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.155453

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Phosphate recovery from wastewater via vivianite crystallization using separable ferrous modified biochar beads

Yiwen Wang,

Hanbing Li,

Yawen Zhao

et al.

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2024

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Simultaneous Recovery of Vivianite and Humic Acids from Waste Activated Sludge via Ferric Trichloride Flocculation and Enzymatic Hydrolysis Co-Treatment

Cheng,

Niu,

2024

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Synchronously recovering phosphorus as vivianite and humic acids (HAs) from waste activated sludge (WAS) is of great significance for the carbon neutralization of wastewater. In this study, flocculation, enzyme degradation (lysozyme/protease/amylase/cellulase in a 1:1:1:1 ratio), and pH adjustment were used to reclaim vivianite and HAs. After FeCl3 coagulation–precipitation and enzymatic hydrolysis of the sludge for 11 h, the supernatant was enriched with Fe2+ and PO43−, with the molar ratio of Fe2+:PO43− of 2.21. To improve the purity of the vivianite, the crude protein was separated at pI 6.0. The purity of the crystals reached a peak of 97.44 ± 0.04% at pH 7.5. HAs extracted from the residuals had a high affinity for metal adsorption, and the adsorption process was both endothermic and efficient. Overall, this study demonstrates the feasibility and effectiveness of the joint reclaiming of vivianite and HAs, providing new insights into multiple resource recovery from WAS.

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Simultaneous Recovery of Vivianite and Humic Acids from Waste Activated Sludge via Ferric Trichloride Flocculation and Enzymatic Hydrolysis Co-Treatment

Cheng,

Niu,

2024

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Phosphate recovery from wastewater via vivianite crystallization using separable ferrous modified biochar beads

Cited by 1 publication

References 85 publications

Simultaneous Recovery of Vivianite and Humic Acids from Waste Activated Sludge via Ferric Trichloride Flocculation and Enzymatic Hydrolysis Co-Treatment

Simultaneous Recovery of Vivianite and Humic Acids from Waste Activated Sludge via Ferric Trichloride Flocculation and Enzymatic Hydrolysis Co-Treatment

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