Prospects for modifying the method of obtaining struvite from highly concentrated wastewater
https://doi.org/10.22227/1997-0935.2025.11.1718-1727
Abstract
Introduction. The paper examines the influence of impurities on struvite crystallization during nitrogen and phosphorus extraction from highly concentrated wastewater. The practical importance of considering inhibiting and intensifying factors to increase the yield and purity of the product is shown.
Materials and methods. The reviewed publications from 2006–2025 in Russian and English, selected by searching in large bibliographic databases, are summarized. The types of wastewater and process conditions (acidity range, magnesium, ammonium, and phosphate ratio, use of seed, reactor operating modes) and the influence of inorganic and organic impurities are analyzed.
Results. The main inhibitors are: calcium (conversion of phosphorus to calcium phosphates), iron (III) (competitive precipitation of iron phosphates), heavy metals (lattice defects and growth retardation), the carbonate system and dissolved carbon dioxide (reduced magnesium availability and the proportion of phosphate ions), and high-molecular organic substances (complexation and surface passivation). Small doses of aluminum with a coagulating effect, the use of solid particles as seed and optimization of the ionic strength are described as intensifiers.
Conclusions. For sustainable struvite formation in real wastewater, pretreatment (reduction of calcium and iron, removal of heavy metals and organic impurities) and supersaturation control (acidity control, removal of carbon dioxide, and the introduction of seeding agents) are required. Considering the composition of impurities increases the degree of extraction of phosphorus and ammonium nitrogen and improves the quality of the product.
About the Authors
V. S. Lipatov
Sergo Ordzhonikidze Russian State University for Geological Prospecting (MGRI)
Russian Federation
Russian Federation
Vitaly S. Lipatov — postgraduate student of the Department of Construction of Water Supply and Sanitation Systems and Structures
23 Miklukho-Maklaya st., Moscow, 117485
E. S. Gogina
Sergo Ordzhonikidze Russian State University for Geological Prospecting (MGRI)
Russian Federation
Russian Federation
Elena S. Gogina — Candidate of Technical Sciences, Associate Professor, Head of the Department of Construction of Water Supply and Sanitation Systems and Structures
23 Miklukho-Maklaya st., Moscow, 117485
RSCI AuthorID: 298730, Scopus: 55841908100, ResearcherID: P-7887-2015
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Review
For citations:
Lipatov V.S., Gogina E.S. Prospects for modifying the method of obtaining struvite from highly concentrated wastewater. Vestnik MGSU. 2025;20(11):1718-1727. (In Russ.) https://doi.org/10.22227/1997-0935.2025.11.1718-1727
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