A method for dissolving medium and low-grade phosphate rock by utilizing activated sludge microbial flora

Abstract

The invention relates to a method for dissolving mid-low-grade phosphate ore by utilizing activated sludge microbial flora. The method comprises the following steps: 1) performing enrichment culture on the activated sludge microbial flora, namely, performing the enrichment culture on the activated sludge microbial flora to obtain an activated sludge microbial flora enrichment culture solution; 2) performing hardening culture on the activated sludge microbial flora, namely, performing the hardening culture on the activated sludge microbial flora enrichment culture solution to obtain an activated sludge microbial flora hardening culture solution; 3) dissolving the mid-low-grade phosphate ore by the activated sludge microbial flora hardening culture solution, namely, adding a non-phosphorus culture medium and the mid-low-grade phosphate ore into a container, and then adding the activated sludge microbial flora hardening culture solution for culturing. The method provided by the invention is simple in process, low in culture condition requirements and low in production cost; the phosphate dissolving rate of the mid-low-grade phosphate ore reaches over 60 percent. By adopting the method, activated sludge can be changed from waste into treasure, and a positive effect on the utilization and treatment of municipal domestic wastewater is achieved.

Description

technical field [0001] The invention relates to the technical field of phosphate rock mining and processing, in particular to a method for dissolving medium and low-grade phosphate rock by using activated sludge microbial flora. Background technique [0002] Phosphate rock is an indispensable raw material for the production of phosphate fertilizers in industry. According to statistics, more than 80% of the world's phosphate rock is used for the production of phosphate fertilizers. At present, there are many ways to produce phosphate fertilizers in industry, mainly including wet method and thermal method, but these methods are generally only suitable for processing high-grade phosphate rock. [0003] my country is rich in phosphate rock resources, but most of them are medium and low-grade phosphate rock. The content of phosphorus pentoxide in the ore is low, the embedded particle size is small, and the mineral composition is complex. If traditional wet or thermal methods are...

AI Technical Summary

Problems solved by technology

However, studies on the dissolution of medium and low-grade phosphate rock by microorganisms mostly use a single or several strains of known composition, and research on the dissolution of medium and low-grade phosphate rock by natural and unknown microbial flora is still rare.

Activated sludge microbial flora is mostly used in the research of phosphorus removal in domestic sewage, and there is no research on phosphorus dissolution in medium and low-grade phosphate rocks.