Preparation method and application of magnetic diatomite composite powder carrier material

A composite powder and carrier material technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve the effect of accelerated separation, large specific surface area, and improved biocompatibility

Pending Publication Date: 2021-07-09
HUNAN SANYOU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of sewage treatment, diatomite modified sewage treatment agent is one of the more commonly used methods at present. Although it has achieved efficient and stable water effluent effect on the basis of cooperating with the process flow, there are still some problems that need to be solved urgently.

Method used

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  • Preparation method and application of magnetic diatomite composite powder carrier material
  • Preparation method and application of magnetic diatomite composite powder carrier material
  • Preparation method and application of magnetic diatomite composite powder carrier material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of magnetic diatomite composite powder carrier material, comprising the following steps:

[0040] (1) Take 1-10g of diatomite powder, put it in a 500mL beaker, and add 200-400mL of deionized water;

[0041] (2) Place the beaker in step (1) in a heat-collecting constant temperature magnetic stirrer for stirring treatment for 15-100 minutes to form a relatively uniform dispersion;

[0042] (3) Heat the dispersion liquid in step (2) in a water bath for 2 to 12 hours under the condition of magnetic stirring. 2 4H 2 O, the solution is brown-green;

[0043] (4) Gradually add 0.5 to 10 g of FeCl to the solution in step (3) under the condition of magnetic stirring 3 , and at the same time raise the temperature to 75-85°C, at this time the solution turns black, and keep stirring for 2-5 hours;

[0044] (5) In the case of magnetic stirring, add 0.25 to 1.5 mol / L of Na dropwise to the solution in step (4) 2 S solution, adjust the pH value to 11;

[0045] (...

Embodiment 2

[0050] A kind of application of magnetic diatomite composite powder carrier material, comprises the following steps:

[0051] (1) Add the magnetic diatomite composite powder carrier material prepared in Example 1 into the SBR process;

[0052] (2) The sewage treatment process adopts the SBR process, which mainly includes the water inlet section, the stirring section, the aeration section, the sedimentation section, the drainage section and the static section;

[0053] (3) The water retention time in the SBR process is 4 to 12 hours, and the sludge retention time is 12 to 30 days;

[0054] (4) According to the mixed sludge concentration (MLSS) in the aerobic section, the dosage of magnetic diatomite composite powder carrier material is 0-5% of MLSS;

[0055] (5) After adding magnetic diatomite composite powder carrier material, the sludge concentration can reach 5000-12000mg / L;

[0056] (6) After the operation is stable, the sewage treatment capacity is increased to 1-3 times...

Embodiment 3

[0058] (1) In the drainage stage in embodiment 2, channel-type drainage pipes are set, such as Figure 4 shown;

[0059] (2) The sludge flows from the 1-biological reaction tank to the drainage channel through the 2-sewage overflow port;

[0060] (3) The sludge in step (2) enters the 4-complete return channel and the 5-rotating magnetic field channel through the 10-flow regulating weir plate regulation sludge, and enters the 4-through the opening and closing degree of the 10-flow regulating weir plate. - The adjustment ratio in the complete backflow channel is 0-100%;

[0061] (4) The sludge entering the 4-full return channel is directly returned to the biochemical reaction unit;

[0062] (5) Under the action of the magnetic plate, the sludge entering the 5-rotating magnetic field channel is adsorbed at the bottom of the 6-conveyor belt, while the non-magnetic sludge flows out of the 5-rotating magnetic field channel and is discharged as residual sludge ;

[0063] (6) Drive...

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Abstract

The invention belongs to the field of environmental functional material preparation and the technical field of biological sewage treatment, and particularly relates to a preparation method and application of a magnetic diatomite composite powder carrier material. The magnetic diatomite composite powder carrier material prepared by the method can be applied to the sewage treatment process, under the effect of an external magnetic field, a remarkable effect is achieved on selective separation of sludge. The preparation method and application of the magnetic diatomite composite powder carrier material have the following advantages that (1) the preparation method for the magnetic diatomite is relatively mild and relatively low in cost, and the prepared powder carrier material is relatively good in magnetism; (2) a certain amount of FeCl2.4H2O and FeCl3 are added, so that the diatomite can be acidized, and the number of active sites of the diatomite is increased; and (3) the magnetic sulfur diatomite composite powder carrier material prepared by the invention has a very abundant gap structure, a large specific surface area and more active sites, and is easy for attachment growth of microorganisms.

Description

technical field [0001] The invention relates to the field of preparation of environmental functional materials and the technical field of sewage biological treatment, in particular to a preparation method and application of a magnetic diatomite composite powder carrier material. Background technique [0002] my country's "Water Ten Articles" stipulates that by 2020, the water quality of the seven major river basins must be higher than 70% because of Class III, and the concentration limit of ammonia nitrogen and total nitrogen in Class III water bodies is 1mg / L. A series of regulations and requirements have prompted Emission standards for various industries have become more stringent. Therefore, it is the original intention and mission of environmental management workers to realize "clear water and green banks, fish flying in shallow bottom". Continuous improvement and steady improvement are still important links to comprehensively improve the quality of my country's ecologic...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/10C02F9/14
CPCC02F3/1263C02F3/107C02F1/488Y02W10/10
Inventor 易境侯丹
Owner HUNAN SANYOU ENVIRONMENTAL TECH CO LTD
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