Method for preparing biopolymerization ferric sulfate

A technology of biological polymerization and ferric sulfate is applied in the field of the preparation of biologically polymerized ferric sulfate and the microbial catalytic oxidation of ferrous sulfate to prepare polymerized ferric sulfate. Friendly, low-cost effects

Inactive Publication Date: 2008-07-09
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, with NaNO 2 As a catalyst, residues in the product will have a certain impact on the treated water, especially drinking water, and at t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 total iron content is 20kg / m 3 Preparation of BPFS

[0030] A method for preparing biopolymerized ferric sulfate by microbial catalyzed oxidation of ferrous sulfate, which consists of the following processes in turn:

[0031] (1) Preparation of reaction feed liquid

[0032] The required amount of purity ≥ 90wt% industrial FeSO 4 ·7H 2 O is added to a container filled with a certain amount of water, according to 10 ~ 13kg / m 3 Its purity is 95wt% industrial concentrated sulfuric acid to adjust the pH value of solution by adding its purity in dosage, and according to Potassium Chloride 6~10g / m 3 , ammonium sulfate 240~320g / m 3 , Potassium dihydrogen phosphate 120~200g / m 3 , magnesium sulfate 120~200g / m 3 , calcium nitrate 10~15g / m 3 Nutrients are added to obtain a total iron content of 20kg / m 3 reaction liquid.

[0033] (2) Preparation of biopolymer ferric sulfate stock solution

[0034] It is 20kg / m to make total iron content to above-mentioned ste...

Embodiment 2

[0040] Example 2 The total iron content is 40kg / m 3 Preparation of BPFS

[0041] (1) Preparation of reaction feed liquid

[0042] The required amount of purity ≥ 90wt% industrial FeSO 4 ·7H 2 O is added to a container filled with a certain amount of water, according to 10 ~ 13kg / m 3 Its purity is 95wt% industrial concentrated sulfuric acid to adjust the pH value of solution by adding its purity in dosage, and according to Potassium Chloride 6~10g / m 3 , ammonium sulfate 240~320g / m 3 , Potassium dihydrogen phosphate 120~200g / m 3 , magnesium sulfate 120~200g / m 3 , calcium nitrate 10~15g / m 3 Nutrients were added to obtain a total iron content of 40kg / m 3 reaction liquid.

[0043] (2) Preparation of biopolymer ferric sulfate stock solution

[0044] To the total iron content that above-mentioned step (1) obtains is 40kg / m 3 The acidophilic aerobic and chemoautotrophic Thiobacillus ferrooxidans (Thiobacillus Ferrooxidans) of the genus Thiobacillus was introduced into the f...

Embodiment 3

[0050] Example 3 The total iron content is 60kg / m 3 Preparation of BPFS

[0051] (1) Preparation of reaction feed liquid

[0052] 1 / 2 the required amount of purity ≥ 90wt% industrial FeSO 4 ·7H 2 O into a container filled with a certain amount of water, and then add 1 / 2 of 10 ~ 13kg / m 3 Amount of its purity is 95wt% industrial concentrated sulfuric acid to adjust the pH value of the solution, and press Potassium Chloride 6~10g / m 3 , ammonium sulfate 240~320g / m 3 , Potassium dihydrogen phosphate 120~200g / m 3 , magnesium sulfate 120~200g / m 3 , calcium nitrate 10~15g / m 3 Add nutrients; to be followed by catalytic reaction Fe 2+ Concentration less than 3.0kg / m 3 , then add the remaining amount to obtain a total iron content of 60kg / m 3 reaction liquid.

[0053] (2) Preparation of biopolymer ferric sulfate stock solution

[0054] To the total iron content that above-mentioned step (1) obtains is 60kg / m 3 The acidophilic aerobic and chemoautotrophic Thiobacillus ferroox...

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Abstract

A process for preparing BPFS by catalyzing and oxidizing ferrous sulfate with microorganism, which comprises following steps: taking industrial ferrous sulfate as raw materials, using industrial concentrated sulphuric acid to regulate pH according to the adding content of 10-13kg/m3, taking inorganic salt as nutrients, preparing ferrous sulfate reaction feed liquid whose total iron content is 20-100kg/m3, inducing ferrous sulfate thiobacillus into the reaction feed liquid, pumping in air with the speed of 9-15 L/L. min at indoor temperature, preparing BPFS stock solution whose total iron content is 20-100kg/m3 and reaction cycles are stable, mixing the stock solution with the reaction feed liquid with the same concentration, pumping in air according to the above conditions, preparing BPFS whose total iron content is 20-100kg/m3 under the catalysis of the bacillus, and controlling the concentration of Fe 2+ no higher than 0.3 kg/m3 at the reaction terminal. When the ferrous sulfate reaction feed liquid whose total iron content is more than 50kg/m3, firstly, 1/2 ferrous salt and concentrated sulphuric acid are added, and each residual is complemented when the concentration of Fe2+is lower than 3.0kg/m3.

Description

technical field [0001] The invention relates to a preparation method of polyferric sulfate, in particular to a preparation method of biopolymerized ferric sulfate, in particular to a method for preparing polyferric sulfate by catalyzing ferrous sulfate oxidation by microorganisms. Background technique [0002] Polyferric sulfate (PFS) is an inorganic polymer flocculant, the liquid is reddish brown, and the solid is yellow powder. PFS is superior to other inorganic flocculants in the removal of turbidity and COD, and has many advantages such as a wide range of pH values, non-toxicity, and low corrosion to equipment. Compared with traditional ferrous sulfate, aluminum sulfate, and polyaluminum , PFS has less dosage, fast coagulation, high floc strength, and has the characteristics of decolorization, sterilization, radioactive elements, heavy metal ions, and COD reduction. [0003] Japan successfully developed PFS in the 1970s and obtained a patent. Since the development in t...

Claims

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Application Information

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IPC IPC(8): C12P3/00C02F1/52C12R1/01
Inventor 关晓辉鲁敏秦玉华
Owner NORTHEAST DIANLI UNIVERSITY
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