Recycling of nitrogen and phosphorus from industrial and agricultural waste has attracted attention because of the need to realize a concept of social sustainable development based on a closed-loop economy. These elements are biological and are crucial to the growth of plants. The reserves of phosphorus are limited, and the process of producing nitrogen consumes electricity. Potential sources of secondary raw materials include water waste from many industries such as fertilizer industry, pharmaceutical industry, semiconductor production, agriculture, etc. The circulation of nitrogen and phosphorus not only reduces the consumption of non-renewable mineral resources, but also weakens the saturation of natural water resources, and excessive saturation of biological components will lead to water loss and reduced drinking water. To solve this problem, scientists have developed a new method that improves the efficiency of extracting ammonia, a nitrogen and a phosphorus from waste.
Perm Polytechnic Scientist technology obtained by Struvet
The traditional method does not allow such results. In addition, scientists' technology will allow long-term domestic fertilizers based on strovite, phosphate minerals and promote import substitution. The study was published in the Journal of Applied Chemistry.
The technology modified by scientists at Permian Polytechnic Institute is simple to implement and fast process speed. It can simultaneously extract ammonium and phosphate from wastewater without the need for excess reagents.
obtained by Scientist Technology of Perm Polytechnic Institute "Because traditional runoff is dominated by ammonium and has a low phosphate content, the remaining phosphate and all magnesium are also needed to be introduced into the runoff. We recommend that the mixture of magnesium salts and phosphates intended to be used as preparation of Struvit reagents be modified into the liquid form of active amorphous intermediates. This makes it possible to thoroughly remove water waste from ammonium and phosphates," said Irina Permyakova, associate professor in the Department of Chemistry and Biotechnology at PNIPU.
After a series of experiments, scientists were able to replace reaction-qualified reagents with more readily available sources of magnesium and phosphorus, which would help reduce the cost of struvit-based fertilizers in the future.
By using the active intermediate Permian, scientists were able to increase the recovery rate of ammonium and phosphate in aqueous solution to 98-99%. The research results will be useful for enterprises that contain water-based wastes containing ammonium phosphate impurities. From this waste, the company will be able to manufacture Struvit and sell it as a mineral fertilizer. This work was completed within the framework of the "Priority-2030" academic strategic leadership program with financial support from the Russian Foundation for Basic Research.
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