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A kind of method utilizing microorganism immobilization to prepare polyferric sulfate

A technology for polymerizing ferric sulfate and microorganisms, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of nitrogen oxides polluting the atmospheric environment, affecting the quality of treated water and drinking water, and prolonging the preparation cycle. The effect of reducing transportation costs, small footprint, and low economic costs

Active Publication Date: 2019-05-21
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether sodium nitrite is used as a catalyst or nitric acid is used as a catalyst, nitrogen oxides will be produced during the reaction process to pollute the atmospheric environment, and nitrite is a suspected carcinogen, and residues in the product will affect the treated water. Especially drinking water quality has an impact
[0007] The disadvantage of the existing microbial catalytic oxidation method is that the microorganisms are suspended in the solution and lost with the transfer of the product, resulting in a sharp decrease in the biomass in the reactor, prolonging the subsequent preparation cycle and reducing the efficiency

Method used

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  • A kind of method utilizing microorganism immobilization to prepare polyferric sulfate
  • A kind of method utilizing microorganism immobilization to prepare polyferric sulfate

Examples

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Effect test

Embodiment 1

[0031] Example 1 The total iron content is 40kg / m under the condition that the reaction solution ratio is 1:1 3 Preparation of PFS

[0032] A kind of method that utilizes immobilized microorganism catalytic oxidation ferrous sulfate of embodiment 1 to prepare biopolymeric ferric sulfate specifically comprises the following contents:

[0033] (1) Preparation of reaction feed liquid

[0034] According to the total iron content of the prepared PFS A 40kg / m 3 , according to the formula: X=40×V×278 / 56 ,when V= When 10L, calculate the industrial FeSO that needs to be added 4 ·7H 2 O's mass X Be 2Kg, obtain reaction material liquid , the total iron content of the A Refers to the amount of ferrous iron and ferric iron contained in each cubic meter of volume, V is the volume;

[0035] (2) Preparation of polyferric sulfate stock solution

[0036] Such as figure 2 As shown, take m The reaction feed liquid in the above step (1) of L , after introducing microorganisms, i...

Embodiment 2

[0039] Example 2 The total iron content is 40kg / m under the condition that the reaction solution ratio is 0:4 3 Preparation of PFS

[0040] A kind of method that utilizes immobilized microorganism catalytic oxidation ferrous sulfate of embodiment 2 to prepare biopolymeric ferric sulfate specifically comprises the following contents:

[0041] (1) Preparation of reaction feed liquid

[0042] According to the total iron content of the prepared PFS A 40kg / m 3 , according to the formula: X=40×V×278 / 56 ,when V =10L, calculate the industrial FeSO that needs to be added 4 ·7H 2 O's mass X Be 2Kg, obtain reaction material liquid ;

[0043] (2) The total iron content is 40kg / m 3 Preparation of Polyferric Sulfate

[0044] Such as figure 2 As shown, take V 0 The reaction feed liquid of L above-mentioned step (1) , do not add polyferric sulfate stock solution, the ratio is P =0:4, after the microorganisms are introduced, they are circulated in the bioreactor, and air is...

Embodiment 3

[0046] Example 3 The total iron content is 40kg / m under the condition that the ratio of the reaction solution is 1:2 3 Preparation of PFS

[0047] A kind of method that utilizes immobilized microorganism catalytic oxidation ferrous sulfate of embodiment 3 to prepare biopolymeric ferric sulfate specifically comprises the following contents:

[0048] (1) Preparation of reaction feed liquid

[0049] According to the total iron content of the prepared PFS A 40kg / m 3 , according to the formula: X=40×V×278 / 56 ,when V =10L, calculate the industrial FeSO that needs to be added 4 ·7H 2 O's mass X Be 2Kg, obtain reaction material liquid ;

[0050] (2) Preparation of polyferric sulfate stock solution

[0051] Such as figure 2 As shown, take m The reaction feed liquid in the above step (1) of L , after introducing microorganisms, it is circulated in the reactor, and air is introduced at a room temperature of 25-28°C for aeration. The aeration rate is 1.08-1.81L / L min, and...

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Abstract

The invention discloses a method for preparing PFS (polymeric ferric sulfate) by virtue of microorganism immobilization. The method is characterized by comprising the following steps of immobilizing microorganisms on reticulated polyurethane to form a biological film; preparing reaction material liquid with full iron content by taking industrial ferrous sulfate as a raw material and taking inorganic salt as a nutrient; introducing the microorganisms into the reaction material liquid, introducing the reaction material liquid into a bioreactor for circular flowing, and performing aeration at room temperature to prepare a PFS stock solution ; mixing the reaction material liquid and the stock solution with full iron content same as that of the reaction material liquid to obtain reaction liquid according to a certain proportion, introducing the reaction liquid into the bioreactor in which the biological film is formed, performing operation to prepare PFS with full iron content according to the reaction condition, collecting [F<2+>] solutions remaining in every cycle into a dissolving aeration tank for aeration reaction, and obtaining a PFS finished product when the content of [F<2+>] is smaller than or equal to 0.3kg / m<3>. The method can be used for coagulation treatment of various kinds of water, and has the advantages of simplicity, high operational flexibility, low cost, no pollution and the like.

Description

technical field [0001] The invention relates to a method for preparing polyferric sulfate, in particular to a method for preparing polyferric sulfate by immobilizing microorganisms. Background technique [0002] Polyferric sulfate (PFS) is an inorganic polymer flocculant whose liquid is reddish brown and solid is yellow powder. Compared with traditional aluminum sulfate, ferrous sulfate, polyaluminum, etc., PFS has low production cost, less dosage, fast coagulation, high floc strength, and has the functions of removing turbidity, decolorization, sterilization, radioactive elements, heavy metal ions, It has the characteristics of reducing COD, removing sulfide and phosphate, and has the advantages of wide application range of pH value, easy treatment of low temperature and low turbidity water, non-toxic, and little corrosion to equipment. [0003] PFS is a new type of inorganic polymer coagulant developed abroad in the 1970s. Because its comprehensive performance in water su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00C12N11/08C12R1/01
CPCC12N11/08C12P3/00
Inventor 关晓辉王悦刘雅琪鲁敏徐小惠
Owner NORTHEAST DIANLI UNIVERSITY
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