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Method for deodorizing kitchen waste and simultaneously enhancing acid production

A technology of kitchen waste and activated carbon, which is applied in the direction of chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve problems such as easy generation of malodorous gas, restrictions on the popularization and application of anaerobic fermentation technology, and limited effect of odor treatment, and achieve effective Facilitate growth and reproduction, reduce odorous gas, and be easy to operate

Inactive Publication Date: 2020-05-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the anaerobic fermentation process of food waste, the problem of malodorous gas is easy to be produced, which not only poses a direct health risk to the surrounding residents and arouses public concern, but also restricts the further promotion and application of anaerobic fermentation technology
The traditional "end adsorption" technology has limited effect on the treatment of the odor generated in the anaerobic fermentation process of food waste, and cannot meet the requirements of green economy. Deodorization Technology in Oxygen Fermentation Process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Experimental group 1:

[0018] (1) Crushing the shell activated carbon to 2mm, pickling with 1.0M dilute nitric acid, drying at 60°C for later use;

[0019] (2) Add 2 g of dried activated carbon to 100 mL of FeCl with a concentration of 0.05 M 3 in solution;

[0020] (3) Under nitrogen protection, 0.2M NaBH 4 The solution was added dropwise to FeCl 3 In the mixed solution with activated carbon, use mechanical agitation to fully mix until no obvious bubbles are generated to obtain nano-iron-loaded activated carbon, which is stored in an anaerobic environment for later use;

[0021] (4) Add food waste and sludge with a solid content rate of 10% to anaerobic fermentation equipment (full-automatic methane potential analyzer (AMPTS-II)), wherein, the VS inoculation ratio of food waste and sludge 20, then add the nano-iron-loaded activated carbon prepared in step (3) to the anaerobic fermentation equipment, wherein the mass ratio of nano-iron-loaded activated carbon to ki...

Embodiment 2

[0026] Experimental group 2:

[0027] (1) Crushing the shell activated carbon to 2mm, pickling with 1.0M dilute nitric acid, drying at 60°C for later use;

[0028] (2) Add 4g of dried activated carbon to 100mL of FeCl with a concentration of 0.05M 3 in solution;

[0029] (3) Under nitrogen protection, 0.2M NaBH 4 The solution was added dropwise to FeCl 3 In the mixed solution with activated carbon, use mechanical agitation to fully mix until no obvious bubbles are generated to obtain nano-iron-loaded activated carbon, which is stored in an anaerobic environment for later use;

[0030] (4) Add food waste and sludge with a solid content rate of 10% to anaerobic fermentation equipment (full-automatic methane potential analyzer (AMPTS-II)), wherein, the VS inoculation ratio of food waste and sludge 20, and then add the nano-iron-loaded activated carbon prepared in step (3) in the anaerobic fermentation equipment, wherein the mass ratio of the nano-iron-loaded activated carbon ...

Embodiment 3

[0033] Experimental group 3:

[0034] (1) Crushing the shell activated carbon to 2mm, pickling with 1.0M dilute nitric acid, drying at 60°C for later use;

[0035] (2) Add 5g of dried activated carbon to 100mL of FeCl with a concentration of 0.05M 3 in solution;

[0036] (3) Under nitrogen protection, 0.2M NaBH 4 The solution was added dropwise to FeCl 3 In the mixed solution with activated carbon, use mechanical agitation to fully mix until no obvious bubbles are generated to obtain nano-iron-loaded activated carbon, which is stored in an anaerobic environment for later use;

[0037] (4) Add food waste and sludge with a solid content rate of 10% to anaerobic fermentation equipment (full-automatic methane potential analyzer (AMPTS-II)), wherein, the VS inoculation ratio of food waste and sludge 20, and then add the nano-iron-loaded activated carbon prepared in step (3) to the anaerobic fermentation equipment, wherein the mass ratio of the nano-iron-loaded activated carbon ...

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PUM

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Abstract

The invention discloses a method for deodorizing kitchen waste and simultaneously enhancing acid production, and belongs to the technical field of solid waste treatment. The method comprises the following steps: firstly, adding activated carbon into a FeCl3 solution; then, under the protection of nitrogen, dropwise adding a NaBH4 solution into a mixed solution of FeCl3 and activated carbon, and fully mixing by mechanical stirring until no obvious bubbles are generated to obtain nano-iron-loaded activated carbon; and adding the kitchen waste, sludge and the nano-iron-loaded activated carbon into anaerobic fermentation equipment according to a set concentration, and then carrying out anaerobic fermentation. The method is simple and convenient to operate, economical and environment-friendly,malodorous gas generated in the anaerobic fermentation process can be effectively controlled, and meanwhile, generation of volatile fatty acid of an anaerobic fermentation product can further be promoted.

Description

technical field [0001] The invention specifically relates to a method for strengthening acid production while deodorizing kitchen waste, and belongs to the technical field of solid waste treatment. Background technique [0002] With the development of my country's economy and the improvement of people's material living standards, the amount of food waste generated is also increasing year by year. As of 2018, the annual output of kitchen waste in my country has reached nearly 100 million tons. Food waste has the characteristics of high moisture content, high organic matter content, and perishability. If it is not properly treated, it will cause serious environmental risks. Traditional treatment and disposal methods such as landfill and incineration technology will not only produce secondary pollution, but also cause waste of resources. Anaerobic fermentation technology is recognized as an effective food waste resource treatment technology in recent years. This technology us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/54C12P7/52C12P7/40C01B32/354
CPCC12P7/54C12P7/52C12P7/40B01D53/02C01B32/354B01D2253/102
Inventor 刘诺张伟贤刘爱荣邓子龙
Owner TONGJI UNIV