Method for dissolving medium/low grade phosphate ore powder by utilizing acidophilic heterotroph and acidophilic autotroph

A technology of acidophilic heterotrophic bacteria and autotrophic bacteria, applied in the field of low-grade phosphate rock powder, can solve the problems of long phosphorus dissolving cycle, low phosphorus dissolving rate, and unstable phosphorus dissolving effect, so as to reduce poisoning effect and simple process , Maintain the effect of phosphate fertilizer industrial environmental governance

Inactive Publication Date: 2011-09-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although some progress has been made in the research on the use of acidophilic bacteria to dissolve medium and low-grade phosphate rocks, there are still major defects, such as low phosphorus dissolution rate, long phosphorus dissolution cycle, and poor phosphorus dissolution effect. stable etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Utilize the method for acidophilic heterotrophic bacteria and acidophilic autotrophic bacteria to dissolve middle and low grade phosphate rock powder, it comprises the steps:

[0035] 1) Activation of the original bacterial solution of acidophilic heterotrophic bacteria: the addition amount (i.e. the inoculum size) of the original bacterial solution of acidophilic heterotrophic bacteria is 10% (volume percentage) of the volume of the 9K basic salt medium, and the acidophilic heterotrophic bacteria is selected. Bacteria original bacterial liquid and 9K basic salt culture medium; The component of described 9K basic salt culture medium comprises: 3.0 g / L (NH 4 ) 2 SO 4 , 0.5 g / L MgSO 4 .7H 2 O, 0.5 g / L K 2 HPO 4 , 0.1g / L KCl, 0.01 g / L Ca(NO 3 ) 2 And 1000mL sterile water; Press glucose: 9K basic salt culture medium=0.5g: 1000mL, choose glucose; Described acidophilic heterotrophic bacterium is Acidiphilium acidophilum (Acidiphilium acidophilum);

[0036] The 9K basi...

Embodiment 2

[0051] Utilize the method for acidophilic heterotrophic bacteria and acidophilic autotrophic bacteria to dissolve middle and low grade phosphate rock powder, it comprises the steps:

[0052] 1) Activation of the original bacterial solution of acidophilic heterotrophic bacteria: the addition amount (i.e. inoculum size) of the original bacterial solution of acidophilic heterotrophic bacteria is 20% (volume percentage) of the volume of the 9K basic salt medium, and the acidophilic heterotrophic bacteria is selected. Bacteria original bacterial liquid and 9K basic salt culture medium; The component of described 9K basic salt culture medium comprises: 3.0 g / L (NH 4 ) 2 SO 4 , 0.5 g / L MgSO 4 .7H 2 O, 0.5 g / L K 2 HPO 4 , 0.1g / L KCl, 0.01 g / L Ca(NO 3 ) 2 And 1000mL sterile water; Press glucose: 9K basic salt culture medium=0.8g: 1000mL, choose glucose; Described acidophilic heterotrophic bacteria is hidden acidophilic bacteria (Acidiphilium cryptum);

[0053] The 9K basic salt...

Embodiment 3

[0067] Utilize the method for acidophilic heterotrophic bacteria and acidophilic autotrophic bacteria to dissolve middle and low grade phosphate rock powder, it comprises the steps:

[0068] 1) Activation of the original bacterial solution of acidophilic heterotrophic bacteria: the addition amount (i.e. inoculum size) of the original bacterial solution of acidophilic heterotrophic bacteria is 20% (volume percentage) of the volume of the 9K basic salt medium, and the acidophilic heterotrophic bacteria is selected. Bacteria original bacterial liquid and 9K basic salt culture medium; Press glucose: 9K basic salt culture medium=1g: 1000mL, choose glucose;

[0069] The components of the 9K basic salt medium include: 3.0 g / L (NH 4 ) 2 SO 4 , 0.5 g / L MgSO 4 .7H 2 O, 0.5 g / L K 2 HPO 4 , 0.1 g / L KCl, 0.01 g / L Ca(NO 3 ) 2and 1000mL sterile water; the acidophilic heterotrophic bacterium is a mixed bacterial species of Acidiphilium acidophilum (Acidiphilium acidophilum) and hidden...

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Abstract

The invention relates to a method for dissolving medium / low grade phosphate ore powder by utilizing acidophilic heterotroph and acidophilic autotroph. The method is characterized by comprising the following steps: 1) activating an acidophilic heterotroph original bacterial solution to obtain an acidophilic heterotroph activated bacterial solution; 2) activating an acidophilic autotroph original bacterial solution to obtain an acidophilic autotroph activated bacterial solution; 3) mixing the acidophilic heterotroph activated bacterial solution and the acidophilic autotroph activated bacterial solution to acclimate: mixing the two bacterial solutions according to a volume ratio of 1: (0.5-1.5) to obtain a mixed bacterial solution and acclimating the mixed bacterial solution to obtain an acclimated bacterial solution; and 4) performing the biological dissolution of medium / low grade phosphate ore powder: adjusting the pH value of the culture solution D, adding the acclimated bacterial solution, and then placing the container in a 30-35 DEG C thermostatic shaker to perform shaking cultivation at 120-180rpm for 15-20 days and obtain soluble phosphorus. The method is characterized by high phosphorus-dissolving rate, simple technology and low production cost.

Description

technical field [0001] The invention relates to a method for dissolving medium and low-grade phosphate rock powder by using acidophilic heterotrophic bacteria and acidophilic autotrophic bacteria. Background technique [0002] my country is a country rich in phosphate rock resources, but most of them are medium and low-grade phosphate rock. Among the proven reserves of phosphate rock in my country, the average grade of phosphate rock is about 17%, and the rich ore with an ore grade greater than 30% does not exceed 10% of the total reserves. Medium and low-grade phosphate rocks have fine particles and tightly embedded distribution, and are basically in an abandoned position in the development and utilization of phosphate rock resources in my country at present. High content. These factors determine that when the traditional wet or thermal phosphate fertilizer production process is used to process these low-grade phosphate rock resources, the production process is long, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05B11/00C05B17/00
Inventor 肖春桥池汝安张华香方玉娟
Owner WUHAN INSTITUTE OF TECHNOLOGY
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