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

A technology of microbial flora and activated sludge, applied in the direction of phosphate material treatment, etc., can solve the problem of rare low-grade phosphate rock, and achieve the effect of low requirements for cultivation conditions, simple process and environmental friendliness

Inactive Publication Date: 2018-03-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for dissolving medium and low-grade phosphate rock by using activated sludge microbial flora, comprising the steps of:

[0026] 1) Enrichment culture of activated sludge microbial flora: put phosphorus-containing medium and activated sludge into a container (such as a triangular flask) at a volume ratio of 1:0.3, and place the container in a constant temperature shaker at 25°C at 140 Vibration culture was carried out at a rotational speed of 1 rpm for 4 days to obtain the activated sludge microbial flora enrichment culture solution A for the first enrichment culture.

[0027] Put the phosphorus-containing medium and the activated sludge microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.3, and place the container in a constant temperature shaker at 25°C at 140 rpm. Shake culture at a rotating speed of 4 days to obtain the second enrichment culture activated sludge microbial flora enrichment cu...

Embodiment 2

[0037] A method for dissolving medium and low-grade phosphate rock by using activated sludge microbial flora, comprising the steps of:

[0038] 1) Enrichment culture of activated sludge microbial flora: put phosphorus-containing medium and activated sludge into a container (such as a triangular flask) at a volume ratio of 1:0.4, and place the container in a constant temperature shaker at 22°C at 160 Vibrating culture at a rotational speed of 1 rpm for 3 days to obtain the activated sludge microbial flora enrichment culture solution A for the first enrichment culture.

[0039] Put the phosphorus-containing medium and the activated sludge microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.5, and place the container in a constant temperature shaker at 30°C at 140 rpm. Shake culture at a rotating speed of 4 days to obtain the second enrichment culture activated sludge microbial flora enrichment culture solution A...

Embodiment 3

[0048] A method for dissolving medium and low-grade phosphate rock by using activated sludge microbial flora, comprising the steps of:

[0049] 1) Enrichment culture of activated sludge microbial flora: put phosphorus-containing medium and activated sludge into a container (such as a triangular flask) at a volume ratio of 1:0.45, and place the container in a constant temperature shaker at 24°C at 100 Vibration culture was carried out at a rotational speed of 1 rpm for 4 days to obtain the activated sludge microbial flora enrichment culture solution A for the first enrichment culture.

[0050] Put the phosphorus-containing medium and the activated sludge microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.5, and place the container in a constant temperature shaker at 30°C at 120 rpm. Shake culture at a rotating speed of 4 days to obtain the second enrichment culture activated sludge microbial flora enrichment c...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/01
CPCC01B25/01
Inventor 肖春桥池汝安张华香徐志高张越非余军霞徐源来周芳
Owner WUHAN INSTITUTE OF TECHNOLOGY
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