Obtaining a new kind of organic fertilizer on the basis of low-grade phosphorite of Central Kyzylkum

Abstract

The paper presents the results of processing low-grade phosphorites by microorganisms of activated sludge from the biochemical purification production unit of JSC “Navoiazot”. The obtained results on the leaching of rare and rare-earth elements into the liquid phase make it possible to separate them and thus enrich the phosphorites. Other options are the gravitational separation of the crushed calcite particles. In addition to this, there is a real possibility of creating complex organomineral fertilisers.

Obtaining complex fertilizers based on low-grade phosphorites

“…In our previous work [20], the processes of obtaining organic fertilizers based on sewage sludge and sludge phosphorite were investigated. The combined processing of sewage sludge and sludge phosphorite made it possible to use activated sludge microorganisms to convert non-digestible forms of phosphorus of substandard phosphorites into an assimilable form for plants, since microorganisms contained in sewage sludge can use many minerals, including phosphate, for their growth and development, in addition to this, sewage sludge contains a significant amount of carboxylic acids that can bind calcium ions contained in partially decomposed mine phosphorites acid acids.…”

Kinetics and Mechanism of Decomposition of Low-Quality Phosphorites of the Zhanatas Deposit

“…According to the analysis of Table 1, mixing phosphoric acid with phosphoric acid for 15-60 minutes does not indicate the actual effect on the degree of decomposition of phosphorite. Experiments 3.4 and 5.6 differ from each other only by mixing phosphoric acid, the degree of decomposition of phosphorite is 70.5 and 69.0%, respectively [10,11]. In experiments 7.8 and 9.10 it is 70.5 and 69.7% respectively.…”