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Open AccessArticle

The Recovery of Phosphorus from Acidic Ultra-High Phosphorous Wastewater by the Struvite Crystallization

by Qiang Li 1,†, Song Wang 2,3,†, Lifang Wang 1, Li Zhang 3,*, Xiaohui Wan 3 and Zhiguo Sun 3,*
1
School of Management, Northwestern Polytechnical University, 127 West Youxi Road, Xian 710072, Shaanxi Province, China
2
Shangtex Architectural Design Research Institute Co., Ltd., Shanghai 200060, China
3
Research Center of Resource Recycling Science and Engineering, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, China
*
Authors to whom correspondence should be addressed.
These authors contribute equally to this work.
Water 2020, 12(4), 946; https://doi.org/10.3390/w12040946 (registering DOI)
Received: 4 February 2020 / Revised: 11 March 2020 / Accepted: 18 March 2020 / Published: 26 March 2020
(This article belongs to the Section Water and Wastewater Treatment)
Phosphorus recovery from industrial wastewater has attracted considerable interest. In this study, struvite crystallization method has been used for treatment of high phosphorus wastewater. The new combination agents of Mg5(CO3)4(OH)2·4H2O and NH4Cl were used as the precipitant. The effects of initial pH, n(Mg):n(P), n(N):n(P), and reaction time on the removal of total phosphorus (TP) in wastewater were investigated. The results showed that under the condition of initial pH = 4, Mg:N:P = 1.2:1.1:1, reaction time for 30 min, and static storage for 20 min, the residual amount of TP in wastewater was 2.98 mg /L, and the removal rate of TP reached 99.99%. The mass fraction of P2O5 in the generated sediment reached 25.22%, equivalent to high grade phosphate ore and slow-release fertilizer, so as to realize the recycling and utilization of phosphorus in ultra-high phosphorous wastewater. This work will have practical application potential in treatment of high phosphorus wastewater and environmental management.
Keywords: struvite crystallization method; environmental management; ultra-high phosphorus wastewater; basic magnesium carbonate; phosphorus recovery struvite crystallization method; environmental management; ultra-high phosphorus wastewater; basic magnesium carbonate; phosphorus recovery
MDPI and ACS Style

Li, Q.; Wang, S.; Wang, L.; Zhang, L.; Wan, X.; Sun, Z. The Recovery of Phosphorus from Acidic Ultra-High Phosphorous Wastewater by the Struvite Crystallization. Water 2020, 12, 946.

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