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Preparation method of carbon-based composite adsorption material

A composite adsorption material and carbon-based technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of unsatisfactory adsorption and removal effects, etc.

Pending Publication Date: 2022-07-22
HEFEI BAIHE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition of carbonization raw materials such as sewage sludge and kitchen waste and the single traditional carbonization process, the obtained carbon-based composite adsorption materials are still not ideal for the adsorption and removal of pollutants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of carbon-based composite adsorption material, comprising the following steps:

[0025] S1. Sort the kitchen waste, remove the plastic, metal, and glass debris, then mince it to a particle size of 3-6 mm, heat and stir at 85°C for 15 minutes, carry out phase separation to remove grease, and obtain a pretreatment The pretreated kitchen waste has a moisture content of 80%;

[0026] S2. Mix the pretreated kitchen waste, sewage sludge with a moisture content of 80-98%, and 150-300 mesh rice husk powder in a mass ratio of 1:2:0.1 to obtain a mixture, which is then added to the Sodium hydroxide solution with a mass concentration of 20% and hydrogen peroxide with a mass concentration of 20% were sequentially added to the mixture, heated and stirred at 50 ° C for 1.5 h, and then the pH was adjusted to neutral to obtain a pretreated slurry, in which hydrogen The consumption of sodium oxide solution is 10% of the mass of the mixture, and the consumption of h...

Embodiment 2

[0030] A preparation method of carbon-based composite adsorption material, comprising the following steps:

[0031] S1. Sort the kitchen waste, remove the plastic, metal, and glass debris, then mince it to a particle size of 3-6 mm, heat and stir at 95°C for 30 minutes, carry out phase separation to remove grease, and obtain a pretreatment The pretreated kitchen waste has a moisture content of 70%;

[0032] S2. Mix the pretreated kitchen waste, sewage sludge with a moisture content of 95%, and 300-mesh rice husk powder in a mass ratio of 1:5:0.5 to obtain a mixture, and then add it to the mixture Add sodium hydroxide solution with a mass concentration of 30% and hydrogen peroxide with a mass concentration of 30% in turn, heat and stir at 70 ° C for 3 hours, and then adjust the pH to neutrality to obtain a pretreated slurry, in which the amount of sodium hydroxide solution is used. It is 20% of the mass of the mixture, and the amount of hydrogen peroxide is 30% of the mass of ...

Embodiment 3

[0036] A preparation method of carbon-based composite adsorption material, comprising the following steps:

[0037] S1. Sort the kitchen waste, remove the plastic, metal, and glass debris, then mince it to a particle size of 3-6 mm, heat and stir at 90 ° C for 20 minutes, carry out phase separation to remove grease, and obtain a pretreatment The pretreated kitchen waste has a moisture content of 75%;

[0038] S2. Mix the pretreated kitchen waste, sewage sludge with a moisture content of 95%, and 200-mesh rice husk powder in a mass ratio of 1:3:0.4 to obtain a mixture, and then add it to the mixture Add sodium hydroxide solution with a mass concentration of 25% and hydrogen peroxide with a mass concentration of 25% in turn, heat and stir at 60 ° C for 2 hours, and then adjust the pH to neutral to obtain a pretreated slurry, in which the amount of sodium hydroxide solution is used. It is 15% of the mass of the mixture, and the amount of hydrogen peroxide is 20% of the mass of t...

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Abstract

The invention discloses a preparation method of a carbon-based composite adsorption material, which comprises the following steps: mixing pretreated kitchen waste, sewage plant sludge and rice hull powder, pretreating with hydrogen peroxide and sodium hydroxide, adding ferric trichloride and cationic polyacrylamide, conditioning, carrying out filter pressing dehydration, drying, and carrying out heat preservation and carbonization step by step to obtain the carbon-based composite adsorption material. According to the present invention, the common solid waste kitchen waste and sewage plant sludge in cities can be subjected to combined recycling treatment, and the prepared carbon-based composite adsorption material has excellent adsorption effect, and is especially suitable for the harmless treatment of phosphate-containing wastewater.

Description

technical field [0001] The invention relates to the technical field of adsorption material preparation, in particular to a preparation method of a carbon-based composite adsorption material. Background technique [0002] Kitchen waste includes kitchen waste and swill, of which kitchen waste refers to food processing leftovers produced by households and catering industries, such as vegetable leaves, fruit peels, etc., which are high in carbohydrates and cellulose, while swill includes leftovers Leftovers and other edible residues and waste edible oils are mainly composed of starch, protein and oil. Urban kitchen waste has the characteristics of large volume, complex composition, and easy to cause secondary pollution. How to deal with it reasonably and harmlessly has become a difficult point in urban construction. Sewage plant sludge is the sludge produced in the process of sewage treatment, which is rich in organic matter, microorganisms and nutrients such as nitrogen, phosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/26B01J20/0225B01J20/0288B01J20/28004B01J20/3078B01J20/3085C02F1/283C02F1/285C02F1/28B01J2220/46B01J2220/4887C02F2101/105
Inventor 李艳娟
Owner HEFEI BAIHE ENVIRONMENTAL PROTECTION TECH CO LTD
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