TECHNOLOGY OF PNRPU SCIENTISTS WILL RESTORE VALUABLE ELEMENTS FROM PRODUCTION WASTE

9 November 2022 127

The study was published in the “Journal of Applied Chemistry”, 2022. The work was carried out as part of the “Priority 2030” Academic Strategic Leadership Program.

The technology modified by PNRPU scientists is easy to implement, has a high speed of the process, and allows simultaneously extracting ammonium and phosphate from runoffs without using excess reagents.

— Since traditional runoffs contain more ammonium than phosphate, it is necessary to additionally saturate runoffs with the amount of phosphate that is missing for the precipitation of struvite, and in full with magnesium. We proposed to modify the mixture of magnesium and phosphate salts used as reagents for the preparation of struvite by first processing them into a liquid-like form of an active amorphous intermediate. “This made possible to carry out a deep purification of water waste from ammonium and phosphates,” said Irina Permyakova, Candidate of Technical Sciences, Assistant Professor of the Department of Chemistry and Biotechnology at PNRPU.

After a series of experiments, the scientists were able to replace reactive qualification reagents with more affordable raw materials of magnesium and phosphorus. In the future, this

will reduce the cost of the obtained fertilizer based on struvite.

Due to the usage of the active intermediate product, scientists from Perm managed to increase the degree of ammonium and phosphate extraction from aqueous solutions up to 98-99%. The results of the study will be useful for plants with water waste containing phosphate and ammonium impurities. Plants will be able to make struvite from this waste and sell it as a mineral fertilizer.

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