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Application of modified mussel shell filler biological aerated filter in sewage treatment

A mussel shell modification technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, aerobic process treatment, etc., to achieve the effect of improving coupling efficiency, convenient operation, and good environmental benefits

Active Publication Date: 2020-03-27
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the application of modified mussel shells as fillers in biological aerated filters to treat domestic sewage

Method used

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  • Application of modified mussel shell filler biological aerated filter in sewage treatment
  • Application of modified mussel shell filler biological aerated filter in sewage treatment
  • Application of modified mussel shell filler biological aerated filter in sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of modified mussel shell filler, comprising the following steps:

[0032] S1. Preparation of magnetic nanoparticles: In a nitrogen atmosphere, 1g of ferric chloride hexahydrate and 2g of ferrous chloride tetrahydrate were heated up to a reaction temperature of 50°C, and then 10mL of 20wt% ammonia water was added dropwise, and reacted at a constant temperature under nitrogen protection for 2h. to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0033] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and ...

Embodiment 2

[0037] A preparation method of modified mussel shell filler, comprising the following steps:

[0038] S1. Preparation of magnetic nanoparticles: In a nitrogen atmosphere, 1g of ferric chloride hexahydrate and 3g of ferrous chloride tetrahydrate are heated to a reaction temperature of 60°C, and then 30mL of 24wt% ammonia water is added dropwise. to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0039] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and set aside;

[0040] S3. Preparation of magnetic mussel shells: Add 2g of mag...

Embodiment 3

[0043] A preparation method of modified mussel shell filler, comprising the following steps:

[0044] S1. Preparation of magnetic nanoparticles: 1g of ferric chloride hexahydrate and 2.5g of ferrous chloride tetrahydrate were heated to a reaction temperature of 55°C in a nitrogen atmosphere, then 20mL of 22wt% ammonia water was added dropwise, and reacted at constant temperature for 3.5h under nitrogen protection , down to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0045] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and ...

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Abstract

The invention provides a preparation method of a modified mussel shell filler. The preparation method comprises the following steps: S1, preparing magnetic nanoparticles; S2, preprocessing mussel shells: cleaning and drying the mussel shells, carbonizing the mussel shells at a high temperature under the protection of nitrogen, and grinding the mussel shells for later use; S3, preparing magnetic mussel shells: respectively adding the magnetic nanoparticles and ammonia water into water, heating the obtained solution, dropwise adding a silane coupling agent, carrying out a nitrogen-protected constant-temperature reaction, adding mussel shell powder, continuously reacting the obtained mixture, cooling the reacted mixture to room temperature, washing the product with deionized water for three times, and carrying out magnet separation for later use; and S4, preparing the modified mussel shell filler: adding the magnetic mussel shells into water, performing stirring until uniformity, adding an organic acid, performing a reaction, washing the obtained product with water and ethanol for three times, performing magnetic separation, and performing drying and grinding to obtain the modified mussel shell filler. The modified mussel shell filler has the advantages of good sewage purification performance in the biological aerated filter, simple modification conditions, convenience in operation, and high operability.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a modified mussel shell filler, a preparation method thereof, and an application of an aerated biological filter for sewage treatment. Background technique [0002] With the development of science and technology, industrial and domestic water consumption is increasing day by day, but water resources are limited, so sewage recycling is an extremely necessary process, which can relieve water pressure to a certain extent. In the field of sewage treatment, in addition to traditional physical methods, including adsorption method, air flotation separation method, electromagnetic effect method, etc., there are also physical chemical methods and chemical oxidation methods. However, the above methods cannot achieve good results. Therefore, in order to improve the quality of water treatment, the biofilm method has been rapidly developed. The main principle is to form a film throug...

Claims

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Application Information

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IPC IPC(8): C02F3/06C02F3/10C02F101/10
CPCC02F3/06C02F3/107C02F2101/105C02F2101/16C02F2209/08Y02W10/10
Inventor 刘梅陈庆国郝焱刘雨薇
Owner ZHEJIANG OCEAN UNIV