Biological sponge iron preparation and its uses in water disposal

A technology of sponge iron and sewage treatment, applied in the direction of biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, poor practicability, and single effect, and achieve low cost, Fast processing speed and good effect

Inactive Publication Date: 2007-05-16
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the immobilization methods of microorganisms mainly include adsorption immobilization method, crosslinking immobilization method and embedding immobilization method. The role of microorganisms generally has the problems of high cost, single effect, and poor practicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: The biological sponge iron of the present invention treats domestic sewage

[0018] 1. Selection and pretreatment of sponge iron

[0019] The sponge iron selected in the present invention has spatial structure characteristics suitable for the reproduction, growth and activity of microorganisms. Its specific characteristics are shown in Table 1:

[0020] Table 1: Composition and performance indicators of sponge iron

[0021] composition

(%)

all iron

Manganese

chrome

nickel

CaO

MgO

carbon and other impurities

96～97

0.280

0.010

0.038

＜0.01

0.051

About 3~4

physics

indicators

Density (g / cm 3 )

Bulk density (g / cm 3 )

Particle size (mm)

Exterior

2.3～2.7

1.7～1.88

0.5～3.0

Gray-black with bright spots, loose and spongy

[0022] Make the sponge iron into 2-5cm granules, soak in clean water for 4-12 hours, and then rinse.

[0023] 2. Prod...

Embodiment 2

[0033] Embodiment 2: The biological sponge iron of the present invention treats high-P domestic sewage

[0034] 1. Selection and pretreatment of sponge iron

[0035] The sponge iron selected in the present invention has spatial structure characteristics suitable for the reproduction, growth and activity of microorganisms. Its specific feature is identical with embodiment 1.

[0036] Make the sponge iron into 2-5cm granules, soak in clean water for 4-12 hours, and then rinse.

[0037] 2. Production of biological sponge iron

[0038] In the reactor, the above-mentioned sponge iron filler is added, and the sewage to be treated is passed in until the sponge iron filler in the reactor is completely submerged, and then the inoculated sludge is added, and the microbial domestication and immobilization reaction is carried out under the condition of stuffy exposure. When the water quality index of the reactor effluent tends to be stable, it is considered that the production of biolo...

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PUM

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Abstract

The invention discloses a preparing method of biological sponge iron to dispose effluent, which comprises the following steps: 1. making sponge iron into 2-5cm particle; soaking in the clean water for 4-12h; washing; 2. adding predisposed sponge iron in the biochemical reactor; aerating the disposed effluent with pH value at 6-9 until the sponge iron in the reactor is immersed completely; adding active sludge as inoculating flora; proceeding microbe domestication and fixing reaction under exposing condition; waiting the water quality index of outlet water approaching stable; finishing.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a microbial immobilization carrier for sewage treatment, in particular to biological sponge iron. technical background [0002] Water pollution, especially the pollution of N and P elements is one of the main problems faced by my country's environmental protection. Sewage biochemical treatment technology is the main technology in sewage treatment. As an economical and effective means, it plays an extremely important role in preventing water body pollution and improving water body functions. At present, the sewage biochemical treatment process is constantly updated, but the treatment of N, P elements and refractory organic matter generally has the problem of large investment and unsatisfactory results. Improving the effect of sewage biochemical treatment, especially the treatment effect of N and P, and reducing operating costs are the main problems to be solved urgently in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/10C21B13/02
CPCY02W10/10
Inventor 李杰王亚娥
Owner LANZHOU JIAOTONG UNIV
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