Method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge

A technology of biological activated carbon and hydrothermal carbonization, which is applied in the field of environmental protection and biological materials, can solve the problems of less research and industrialization, and achieve the effect of simple processing equipment, strong adjustable application scale, and avoid cumbersome operations

Inactive Publication Date: 2016-06-15
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, domestic exploratory research has been done on algae residue power generation, but industrialization has not yet been formed.
However, there is still little research on the use of algae residue / algae mud in the fields of fertilizers, pesticides, and environmental protection.

Method used

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  • Method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge
  • Method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge
  • Method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Biological Activated Carbon by Cultivating Cyanobacteria Mud in Laboratory

[0030] Include the following steps:

[0031] (1) Collect algae mud by centrifugation; 400ml algae culture solution (algae density: 1~5×10 7 algal cells per milliliter), centrifuge at 10,000 rpm for 10 minutes, discard the supernatant to collect the precipitate, and resuspend with 40ml deionized water.

[0032] (2) Put the algae mud (water content about 90%) into a 50ml hydrothermal reaction kettle (pressure less than 6MPa) and carbonize at a constant temperature of 160°C-220°C in an electric oven for 2-20 hours, then cool naturally to room temperature.

[0033] (3) Centrifuge the mixed solution in the hydrothermal reaction kettle (9000 rpm, 10 minutes), collect the precipitate, wash it with deionized water and absolute ethanol three times in turn, and then dry it at 50-60°C to obtain figure 1 The bioactivated carbon shown.

Embodiment 2

[0035] Direct use of algae residue / algae mud to prepare biological activated carbon

[0036] Include the following steps:

[0037] (1) Salvage the cyanobacteria algae residue / algae mud during the period of cyanobacteria outbreak.

[0038] (2) Directly put 10g of algae residue / algae mud (water content is 90.5%) into the React in a 50ml hydrothermal reaction kettle (pressure less than 6MPa) in an electric oven at a constant temperature of 160°C to 220°C for 2 to 20 hours, then cool naturally to room temperature.

[0039] (3) Centrifuge the mixed liquid in the hydrothermal reaction kettle (9000 rpm, 10 minutes), collect the precipitate, wash it with deionized water and absolute ethanol three times in turn, and then dry it at 50-60°C to obtain the following: figure 2 The bioactivated carbon shown.

[0040] Such as image 3 As shown, with the increase of the amount of water added to the algae residue / algae mud, the conversion rate of bioactivated carbon gradually decreased (fr...

Embodiment 3

[0042] Preparation of bioactivated carbon from naturally dried cyanobacteria bloom residue

[0043] Include the following steps:

[0044] (1) When a cyanobacteria bloom breaks out, the naturally dried algae residue is manually salvaged and crushed into dry algae powder.

[0045] (2) 2g of dry algae powder is mixed with water at a mass volume ratio of 5% to 15%; 6g of dry algae powder is mixed with water at a mass volume ratio of 20% to 200%. Place in a 50ml hydrothermal reaction kettle (pressure less than 6MPa) in an electric oven at a temperature of 160°C to 220°C for 2 to 20 hours, then cool naturally to room temperature.

[0046] (3) Centrifuge the mixed liquid in the hydrothermal reaction kettle (9000 rpm, 10 minutes), collect the precipitate, wash it with deionized water and absolute ethanol three times in turn, and then dry it at 50-60°C to obtain biological activated carbon.

[0047] Such as Figure 4 As shown, with the increase of the amount of water added to the dr...

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Abstract

The invention discloses a method for preparing biological activated carbon by hydrothermal carbonization of algae residue/algae sludge.The method includes the following steps: (1) mixing the algae residue/algae sludge with water prior to putting the mixture into a reaction kettle, performing heating reaction under the pressure less than 6 MPa and at the temperature of 160-220 DEG C for 2-20 hours, and naturally cooling to the room temperature; (2) subjecting a hydrothermal product obtained in the step (1) to filtration or centrifugal separation to obtain solid, and washing the solid; (3) drying the product obtained after washing in the step (2) at the temperature of 50-60 DEG C to obtain the biological activated carbon.Plenty of algae residue can be disposed highly efficiently as well as be utilized to turn waste into treasure; harm brought by the algae residue and algae toxins is reduced, and high efficiency and environmental friendliness are realized.

Description

technical field [0001] The invention relates to the fields of environmental protection and biological materials, in particular to a method for preparing biological activated carbon by hydrothermal carbonization of algae residue / algae mud. Background technique [0002] In recent years, frequent outbreaks of cyanobacterial blooms in large shallow lakes caused by environmental pollution have attracted widespread attention. When cyanobacteria blooms break out, the water surface is covered by a thick layer of blue-green indigo, which migrates to the shore and accumulates with the wind direction, and emits an unpleasant smell after decay. A series of new technologies have been developed for emergency treatment of cyanobacteria blooms, such as manual salvage, mechanical salvage, direct filtration, flocculation or coagulation sedimentation, air flotation, etc. The application of these technologies to deal with cyanobacteria blooms brings another problem at the same time, how to Dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 张宏黄青余增亮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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