A kind of use of cyanobacteria and algae mud of algae water separation station to prepare biomass activated carbon and use it for the adsorption of algal toxins in tail water

A technology of activated carbon adsorption and algae water separation, which is applied in the field of resources and environment, can solve problems such as health hazards of residents in the surrounding ecological environment, and achieve the effects of good adsorption selectivity, good application prospects and uniform appearance.

Active Publication Date: 2022-05-10
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, at present, most of the tail water from the algae water separation station is directly discharged back to the surrounding natural water bodies without effective treatment, and a large amount of algae toxins released by decomposition during the separation process of cyanobacteria and algae water also enter the surrounding natural water bodies with the tail water without treatment, which is harmful to the surrounding ecology. Hazards to the environment and the health of residents

Method used

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  • A kind of use of cyanobacteria and algae mud of algae water separation station to prepare biomass activated carbon and use it for the adsorption of algal toxins in tail water
  • A kind of use of cyanobacteria and algae mud of algae water separation station to prepare biomass activated carbon and use it for the adsorption of algal toxins in tail water

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: the preparation of nano iron oxide

[0023] Under the stirring state of rotating speed, weigh 0.015g (0.0004mol) sodium tripolyphosphate and 0.074g (0.00042mol) potassium sulfate solution and add 0.432g (0.002mol) iron trichloride hexahydrate, after fully dissolving, add 3.6g ( 0.060mol) urea, control the pH value to 10, and obtain the precursor solution; then transfer 80mL of the above mixed solution to a 100mL hydrothermal reaction kettle, and after hydrothermal reaction at 180°C for 25h, the reaction is completed to obtain a brick red precipitate, which is cooled and centrifuged , washing and drying to obtain nanometer iron oxide.

Embodiment 2

[0024] Embodiment 2: preparation of biomass activated carbon, the additive is the nano iron oxide prepared in embodiment 1

[0025] Step S1, uniformly dispersing the nano-ferric oxide in the cyanobacteria-algae mud produced by the algae-water separation station to obtain the algae mud to be treated, the moisture content of the algae mud is controlled at 90.5%, and the addition ratio of nano-iron oxide to the algae mud is 2wt%;

[0026] Step S2, the algae mud to be treated is transported to the continuous supercritical water gasification reactor through a high-pressure plunger pump, and the supercritical water gasification reaction is carried out at a rate of 15 °C / min to 450 °C and 22.5 MPa for 10 minutes, and the reaction Fe(III)-biomass activated carbon was obtained after the product was cooled, gas-liquid-solid separation, solvent washing and drying.

Embodiment 3

[0027] Example 3: Preparation of Biomass Activated Carbon, Without Adding Nano Iron Oxide

[0028] Step S1, controlling the moisture content of the cyanobacteria algae mud produced by the algae water separation station to 90.5%

[0029] Step S2, the algae mud to be treated is transported to the continuous supercritical water gasification reactor through a high-pressure plunger pump, and the supercritical water gasification reaction is carried out at a rate of 15 °C / min to 450 °C and 22.5 MPa for 10 minutes, and the reaction The product is cooled, gas-liquid-solid separation, solvent cleaning, and drying to obtain biomass activated carbon.

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Abstract

The invention discloses a use of cyanobacteria and algae mud in an algae-water separation station to prepare biomass activated carbon and use it for the adsorption of algal toxins in tail water. The biomass activated carbon is prepared by the following method: step S1, uniformly dispersing nano-iron oxide in the algae-water separation station to produce The cyanobacteria algae mud to obtain the algae mud to be treated, the water content of the algae mud is controlled at 80-95%, and the addition ratio of nano-iron oxide in the algae mud is 1-3wt%; step S2, the algae mud to be treated is passed through a high-pressure plunger pump Transport to the continuous supercritical water gasification reactor, heat up to 450-600°C at a rate of 10-15°C / min for supercritical water gasification reaction, the reaction product is cooled, gas-liquid-solid separation, solvent cleaning, and drying Biomass activated carbon with network polymorphic pore structure is obtained. The biomass activated carbon of the invention can effectively absorb algae toxins in tail water, and the cyanobacteria algae mud can be used as a raw material to realize high-efficiency reduction, harmless treatment and reuse of the cyanobacteria algae mud.

Description

technical field [0001] The invention belongs to the field of resources and environment, and in particular relates to the use of cyanobacteria and algae mud in an algae-water separation station to prepare biomass activated carbon and use it for the adsorption of algal toxins in tail water. Background technique [0002] Cyanobacteria are the most primitive and simplest photoautotrophic prokaryotes, which have extremely strong self-adaptive energy and vigorous reproductive energy. They are an important environment in the biological chain of the lake water ecosystem. main sign. The massive growth of cyanobacteria changes the physical and chemical environment of the water body, especially when it erupts, a layer of blue-green and foul-smelling foam (called "water bloom") is formed on the water surface. Large-scale cyanobacteria outbreaks are called "green tides". . Green tides cause water quality to deteriorate, and in severe cases deplete the oxygen in the water and cause the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C01G49/06B82Y40/00C01B32/324C10J3/00
CPCB01J20/20B01J20/06C02F1/288C01G49/06B82Y40/00C01B32/324C10J3/00B01J2220/4843C10J2300/0916Y02P20/54
Inventor 张会文张晓曼丁磊颜庭轩马江雅孔艳丽
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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