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A method for preparing capacitive electrode material by using domesticated activated sludge

A technology of activated sludge and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, sludge treatment, etc., can solve the problems of difficult disposal and utilization of activated sludge, secondary pollution, etc., and achieve good cycle stability, Strong electrical conductivity, the effect of increasing the content of nitrogen element

Active Publication Date: 2018-10-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper treatment and utilization will bring the risk of secondary pollution, so the disposal and utilization of activated sludge has become a major problem in the work of sewage plants

Method used

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  • A method for preparing capacitive electrode material by using domesticated activated sludge
  • A method for preparing capacitive electrode material by using domesticated activated sludge
  • A method for preparing capacitive electrode material by using domesticated activated sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Get 10 grams of nitrification domesticated autotrophic activated sludge (the mass percentage of carbon element in this sludge is 23.04%, the mass percentage of nitrogen element is 6.39%, oxygen element The mass percentage is 28.56%) and dried at 60°C for 6 hours, taken out, ground, passed through a 100-mesh sieve, and then calcined at 800°C for 2 hours under a nitrogen atmosphere at a heating rate of 10°C per minute. The powder was treated with hydrochloric acid, washed with distilled water until neutral, dried at 60°C and passed through a 300-mesh sieve to obtain a self-doped porous sludge carbon material powder, which is a capacitive electrode material.

[0045] The nitrification acclimation is specifically:

[0046] The activated sludge is in the nitrification acclimation solution, and the air flow rate is 1-3L / min for aerobic acclimatization and cultivation, and the MLSS is controlled at 3-6g / L to obtain the autotrophic activated sludge floc with nitrifying bacteria...

Embodiment 2

[0064] Get 10 grams of phenol domestication heterotrophic activated sludge (the mass percentage of carbon element in this sludge is 24.06%, the mass percentage of nitrogen element is 4.72%, oxygen element The mass percentage is 29.16%) and dried at 60°C for 6 hours, taken out, ground, passed through a 100-mesh sieve, and then calcined at 800°C for 2 hours under a nitrogen atmosphere at a heating rate of 5°C per minute, and treated with hydrochloric acid Afterwards, wash with distilled water until neutral, dry at 60° C., and pass through a 300-mesh sieve to obtain self-doped porous sludge carbon material powder, that is, capacitive electrode material.

[0065] The phenol domestication of the present embodiment is specifically:

[0066] The activated sludge is in the phenol acclimation solution, and the air flow rate is 1-3L / min for aerobic acclimatization culture; the MLSS is controlled at 3-6g / L; the heterotrophic activated sludge floes with phenol-degrading bacteria as the do...

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Abstract

The present invention discloses a method for preparing a capacitive electrode material by using domesticated activated sludge. The method comprises the following steps: (1) performing nitrification domestication or phenol domestication on activated sludge to obtain domesticated activated sludge, and (2) drying the resultant sludge in the step (1), performing grinding and sieving, performing calcination at the temperature of 700-1000 degrees centigrade for 1.5-4 hours in an inert gas atmosphere, performing acid treatment and then performing distilled water washing to neutral, performing drying at the temperature of 55-105 degrees centigrade and then performing sieving to obtain a self-doped porous sludge carbon material powder, that is, the capacitive electrode material. The method of the present invention increases the content of the nitrogen element in sludge carbon material, and the material has better capacitor performance.

Description

technical field [0001] The invention belongs to the technical field of capacitive materials, and in particular relates to a method for preparing capacitive electrode materials by utilizing domesticated activated sludge. Background technique [0002] With the increasingly serious problems of energy and environmental pollution, the development of new energy sources or the improvement of energy storage and conversion methods have gradually aroused the interest of researchers. Supercapacitors with high power density, long service life and high safety are an ideal choice to solve energy conversion and storage problems. Based on the charge storage mechanism, supercapacitors can be divided into electric double layer capacitors and pseudocapacitors based on redox reactions. Electrode materials for electric double layer capacitors are mainly carbon materials. Among various pseudocapacitor materials, element doping, polymers, and transition metals are high-performance supercapacitor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/34H01G11/44C02F11/00C02F11/02C02F11/10C02F11/12
CPCC02F11/00C02F11/02C02F11/10C02F11/12H01G11/34H01G11/44H01G11/86Y02W10/20
Inventor 冯春华雷振超冯伟明马萧萧刘厚峰郑嘉毅伍兆基
Owner SOUTH CHINA UNIV OF TECH