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Coagulation diatomite membrane as well as preparation method thereof and method for treating eutrophic water body by utilizing same

A technology of diatomite and diatomaceous earth, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Secondary pollution and other issues

Inactive Publication Date: 2013-04-03
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent document with the publication number CN 102371145A and titled "Composite High Efficiency Cyanobacteria-Eutrophic Water Treatment Agent" discloses a method of mixing and modifying attapulgite clay, bentonite and natural zeolite and compounding with blue algae to treat eutrophic water body preparation method, its defect is: the use efficiency of water treatment agent is not high, and it is difficult to recycle and reuse
The patent document with the publication number CN 101182054 and titled "A Method for Removing Algae by Ultrasonic Waves" discloses a method for removing algae in eutrophic water bodies by ultrasonic waves. release, easy to produce secondary pollution, and have an impact on water safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The process conditions for treating eutrophic water body and the components of diatomite film are as follows:

[0021] coagulant type

Coagulant dosage mmol / L

Diatomaceous earth (%)

Zeolite (%)

Soluble starch (%)

PACs

0.2

84

1

15

[0022] When preparing the diatom concentrate film, add 100 parts of deionized water to the mixed powder, put it into a ball mill tank, control the speed of the ball mill to 220r / min, and run for 4-5h; dry the mixed material, and dry the raw material Add a little deionized water to the powder, pass through a 60-mesh sieve after the powder is slightly viscous, and after aging for 24 hours, the particles are graded; then the pellets are added to the steel mold, and the powder is subjected to positive pressure and back pressure. The force is relatively uniform, and it is pressed into a sheet at 30MPa, and the sheet-shaped membrane blank is dried in a 105°C drying oven for 24 hours. The pressed...

Embodiment 2

[0025] The process conditions for treating eutrophic water body and the components of diatomite film are as follows:

[0026] coagulant type

Coagulant dosage mmol / L

Diatomaceous earth (%)

Zeolite (%)

Soluble starch (%)

FeCl 3

0.2

84

1

15

[0027] When preparing the diatom concentrate film, add 100 parts of deionized water to the mixed powder, put it into a ball mill tank, control the speed of the ball mill to 220r / min, and run for 4-5h; dry the mixed material, and dry the raw material Add a little deionized water to the powder, pass through a 60-mesh sieve after the powder is slightly viscous, and after aging for 24 hours, the particles are graded; then the pellets are added to the steel mold, and the powder is subjected to positive pressure and back pressure. The force is relatively uniform, and it is pressed into a sheet at 30MPa, and the sheet-shaped membrane blank is dried in a 105°C drying oven for 24 hours. The pre...

Embodiment 3

[0030]The process conditions for treating eutrophic water body and the components of diatomite film are as follows:

[0031] coagulant type

Coagulant dosage mmol / L

Diatomaceous earth (%)

Zeolite (%)

Soluble starch (%)

PPML

0.2

84

1

15

[0032] When preparing the diatom concentrate film, add 100 parts of deionized water to the mixed powder, put it into a ball mill tank, control the speed of the ball mill to 220r / min, and run for 4-5h; dry the mixed material, and dry the raw material Add a little deionized water to the powder, pass through a 60-mesh sieve after the powder is slightly viscous, and after aging for 24 hours, the particles are graded; then the pellets are added to the steel mold, and the powder is subjected to positive pressure and back pressure. The force is relatively uniform, and it is pressed into a sheet at 30MPa, and the sheet-shaped membrane blank is dried in a 105°C drying oven for 24 hours. The pressed ...

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PUM

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Abstract

The invention belongs to the field of environmental protection, and particularly relates to a preparation method for a diatomite membrane and determination of a method for treating a eutrophic water body. The diatomite membrane is a microfiltration ceramic film taking diatomite as a raw material, and comprises the following components in percentage by weight: 65-94% of diatomite, 0.5-8% of natural zeolite and 5-30% of starch. Before the eutrophic water body is treated by utilizing the diatomite membrane, a coagulant is added firstly to pre-treat the water body, so that contaminants such as algae, N, P and the like in the water body can be effectively removed. The coagulation diatomite membrane has the characteristics of high treatment efficiency, no secondary pollution and no damage to algae cell bodies.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a preparation method of diatom concentrate earth film and determination of a method for treating eutrophic water body. Background technique [0002] The eutrophication of water body has become a worldwide water pollution control problem, which has aroused great concern of people. The main manifestations of water eutrophication are serious high N and P contents in the water body, and algal blooms. At present, the main technologies for treating eutrophic water body are physical method, chemical method and biological method. Although the effect of the physical method is better, the engineering quantity is large, the operation period is long, and the initial investment cost is slightly higher. Although the chemical method is highly efficient, it is prone to secondary pollution, which will cause a serious vicious circle in the water quality environment, such as th...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00C04B35/14C04B35/622C02F9/04C02F1/44
Inventor 王利平茆永晶许霞张运林冯胜
Owner CHANGZHOU UNIV
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