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A preparation method of solid oxygen particles with slow oxygen release function

A technology of oxygen granules and slow-release oxygen, which is applied in chemical instruments and methods, aerobic process treatment, sustainable biological treatment, etc., can solve the problems of sudden aerobic environment and the failure of aerobic microorganisms to be cultivated, so as to ensure long-term effect High performance, strong practicability and wide application

Active Publication Date: 2021-06-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing black and odorous water body treatment technology, aerobic treatment can be performed on the organic matter in the water to degrade and convert the organic matter into humus-like substances, but the "solid oxygen" in the existing technology cannot maintain a relatively stable dissolved oxygen in the water body for a long time Concentration, causing the anaerobic environment to change to the aerobic environment, so that aerobic microorganisms cannot be cultivated in a short time

Method used

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  • A preparation method of solid oxygen particles with slow oxygen release function
  • A preparation method of solid oxygen particles with slow oxygen release function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Preparation of slow-release oxygen particles

[0024] 1. Prepare biochar by vacuum pyrolysis, air-dry the collected rice straw and grind it so that the initial size is less than 0.25mm, then conduct high-temperature pyrolysis in a tube furnace at 350°C for 2 hours with nitrogen gas, and use 0.1mol / Wash with L HCl and ultrapure water until neutral, dry at 105°C, grind, and filter with a 0.25mm sieve to obtain the initial biochar material.

[0025] 2. Calcinate and grind 0.2mg of clay and 1mg of diatomaceous earth at 500°C and mix them with 0.3mg of ferrous sulfate powder to obtain mixture A; Mix 1 mg of the powder with 0.2 mg of biochar evenly, mix with 0.3 mg of polyvinylpyrrolidone solution (PVP, 3%) and stir thoroughly to obtain a mixture B; add the mixture B to the mixture A, and use a rotary press The tablet machine performs tablet compression to obtain the solid oxygen particles to be prepared.

Embodiment 2

[0027] 1. Inject 1L of distilled water that has been boiled, sterilized and cooled down into a cylindrical reactor with a diameter of 10cm and a height of 15cm. Set up a stirring bar and seal it with a sealing plug. Put 0.2gNa into the reactor from the injection port 2 SO 3 and 0.05gCoCl 2 , close the dosing port, and remove the dissolved oxygen in the reactor. When the DO drops to 0mg / L and stabilizes for 0.5h, the next step of the experiment can be carried out.

[0028] 2. Place the four reactors treated in the above step 1 on the workbench, add 0g, 3g, 6g, and 9g of the solid oxygen particles prepared in Example 1 to the above four reactors respectively, and then add the solid oxygen particles from the drug inlet Insert dissolved oxygen probe and pH probe.

[0029] 3. Test the dissolved oxygen and pH value in the four reactors every day.

[0030] The solid oxygen particles can slowly release oxygen for a long time, and the dosage of more than 6g in 1L of anaerobic water...

Embodiment 3

[0032] 1. Inject 1L of distilled water that has been boiled, sterilized and cooled down into a cylindrical reactor with a diameter of 10cm and a height of 15cm. Set up a stirring bar and seal it with a sealing plug. Put 0.2gNa into the reactor from the injection port 2 SO 3 and 0.05gCoCl 2 , close the dosing port, and remove the dissolved oxygen in the reactor. When the DO drops to 0mg / L and stabilizes for 0.5h, the next step of the experiment can be carried out.

[0033] 2. Place the three reactors treated in the above step 1 on the workbench, add 6g of solid oxygen particles, 6g of percarbamide and potassium persulfate mixture to the above two reactors respectively, and the other reactor Do not add as a blank group, and then insert a pH probe and a dissolved oxygen probe from the drug inlet.

[0034] 3. Check the pH value and dissolved oxygen in the three reactors every day.

[0035] Compared with the mixture of percarbamide and potassium hydrogen persulfate, the solid o...

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Abstract

The invention discloses a preparation method of solid oxygen granules with the function of slow-release oxygen. The preparation method is that clay and diatomaceous earth are calcined and ground, and then mixed with ferrous sulfate powder to obtain mixture A; percarbamide, hydrogen persulfate Potassium powder and biochar are uniformly mixed, then mixed with polyvinylpyrrolidone solution and stirred to disperse uniformly to obtain mixture B; the mixture B is added to the mixture A and mixed uniformly to obtain mixture C, and then the rotary tabletting machine is used for Press into tablets to obtain solid oxygen particles. The method of the invention has the advantages of simple operation, simple and non-toxic reagents, wide application, strong practicability, long-term slow generation of oxygen, and the like.

Description

technical field [0001] The invention relates to a preparation method of solid oxygen particles with a slow-release oxygen function, belonging to the field of preparation of solid oxygen materials. Background technique [0002] Commonly referred to as "solid oxygen" refers to white or colored granular oxygenates made of sodium percarbonate, stabilizers, and synergists. Oxygenizers are designed with special cylindrical particles that can sink directly into the bottom of the pond and mix with water. After the reaction, a large amount of oxygen is produced, which rapidly increases the dissolved oxygen in the water and can maintain high dissolved oxygen in the water for a period of time. [0003] In the existing black and odorous water body treatment technology, aerobic treatment can be performed on the organic matter in the water to degrade and convert the organic matter into humus-like substances, but the "solid oxygen" in the existing technology cannot maintain a relatively st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02C02F1/28
CPCC02F1/283C02F3/02C02F2101/30Y02W10/10
Inventor 郭志李明泽崔康平许为义丁文东殷志明
Owner HEFEI UNIV OF TECH
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