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Method for processing industrial wastes of edible vinegar through anaerobic digestion coupling pyrolysis technology

A technology for industrial waste and anaerobic digestion, which is applied in the field of vinegar industrial waste treatment by using anaerobic digestion coupled pyrolysis technology, can solve the problem of high efficiency, environmental protection, high cost of grid-connected power generation, and air pollution that have not been seen in vinegar residue. To achieve the effect of improving the overall gas production rate, solving the problem of low processing load and increasing the concentration of microorganisms

Inactive Publication Date: 2013-05-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some vinegar factories in China have built direct-fired power generation systems for vinegar residues, on the one hand, the cost of grid-connected power generation is high, and the scale of the vinegar factory itself is high; at the same time, energy recovery and waste disposal also cause atmospheric pollution. pollution problem
At present, there is no efficient, environmentally friendly and systematic treatment process for vinegar residue

Method used

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  • Method for processing industrial wastes of edible vinegar through anaerobic digestion coupling pyrolysis technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Anaerobic digestion of vinegar residue: Mix 20g of vinegar residue with water until the solid content is 10wt%, and then add the sewage treatment plant sludge with a total solid concentration of 3wt% into the CSTR anaerobic digestion reactor. The sludge and vinegar residue The total solid concentration ratio is 1:1, stirred and mixed, anaerobic digestion is performed at 37°C to generate biogas for 30 days, and then all materials are discharged;

[0029] 2. Biogas slurry reflux: After the solid-liquid separation of the anaerobic digestion reaction output, the biogas residue undergoes pyrolysis reaction, and the biogas slurry and new vinegar residue are mixed at a total solid concentration ratio of 1:1 and then enter the CSTR reactor. The anaerobic digestion biogas reaction was carried out for 30 days, and then all the materials were discharged;

[0030] 3. Repeat step 2 to form a continuous and stable cycle process of anaerobic digestion coupled with pyrolysis technol...

Embodiment 2

[0033] 1. Anaerobic digestion of vinegar residue: Mix 20g of vinegar residue with water until the solid content is 15wt%, and then add the sewage treatment plant sludge with a total solid concentration of 5wt% into the CSTR anaerobic digestion reactor. The sludge and vinegar residue The total solid concentration ratio is 1:2, stirred and mixed, anaerobic digestion is performed at 37°C to generate biogas for 30 days, and then all materials are discharged;

[0034] 2. Biogas slurry reflux: After the solid-liquid separation of the anaerobic digestion reaction output, the biogas residue undergoes pyrolysis reaction, and the biogas slurry and new vinegar residue are mixed and constant at a total solid concentration ratio of 1:2 before entering the CSTR reactor The anaerobic digestion biogas reaction was carried out for 30 days, and then all the materials were discharged;

[0035]3. Repeat step 2 to form a continuous and stable cycle process of anaerobic digestion coupled with pyrol...

Embodiment 3

[0038] The system includes an anaerobic digestion stirring system, a 11L CSTR anaerobic digestion reactor (working volume 9L), a constant temperature circulating water bath device, and a single-stage pyrolysis tube furnace.

[0039] 1. Add 9L of sludge from a sewage treatment plant with a total solid concentration of 5wt% and 20g of vinegar residue into the CSTR anaerobic digestion reactor, stir and mix, and perform anaerobic digestion at 37°C to produce biogas. Part of the material is discharged after 1 day. The volume is 200mL;

[0040] 2. After the solid-liquid separation of the output of anaerobic digestion reaction, the biogas residue is dried and then enters a single-stage tubular pyrolysis furnace for pyrolysis reaction at 800°C. About 150mL of biogas slurry is recovered and mixed with new vinegar residue. Add the volume to 200mL into the CSTR anaerobic digestion reactor for anaerobic digestion;

[0041] 3. After that, the CSTR anaerobic digestion reactor has a daily i...

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Abstract

The invention discloses a method for processing industrial wastes of edible vinegar through an anaerobic digestion coupling pyrolysis technology, and belongs to the field of the high-efficiency recycle of organic solid wastes. The method comprises the following steps: mixing vinegar residues with water and an inoculum, adding the obtained mixture to a CSTR anaerobic digestion reactor, and carrying out an anaerobic digestion biogas generation reaction; and carrying out solid-liquid separation of an anaerobic digestion reaction discharge material, mixing the obtained separated biogas slurry with new vinegar residues to a constant volume, allowing the obtained new mixture to the CSTR reactor, continuously carrying out the anaerobic digestion biogas generation reaction, drying the obtained biogas residues, allowing the dried biogas residues to enter a single-stage tubular pyrolysis furnace, and carrying out a pyrolysis reaction. Compared with the prior art, the method disclosed in the invention has the advantages of enhancement of the stability and the load change buffer capability of an anaerobic digestion system, improvement of the biogas generation rate and the recycle rate of the vinegar residues, and simultaneous reaction of the liquid phase product proportion of the pyrolysis process.

Description

technical field [0001] The invention belongs to the field of high-efficiency resource utilization of organic solid waste, and specifically relates to a method for treating vinegar industrial waste by using anaerobic digestion coupled with pyrolysis technology. Background technique [0002] Vinegar residue is a kind of food industrial waste produced in the process of vinegar brewing. Since the vinegar production process is an aerobic fermentation process, a large amount of substances rich in cellulose, hemicellulose and pectin will be added during the fermentation process to ensure the oxygen circulation of the entire fermentation system. These added components are difficult to be decomposed and utilized in the vinegar brewing process, and a large amount of vinegar residue is produced together with the fermentation residue of the main material in the vinegar production process. China is a big vinegar consumption country, and the vinegar residue produced therefrom reaches 3 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCY02E50/30
Inventor 刘广青冯璐张瑞红何艳峰陈畅李叶青肖潇张辰宇
Owner BEIJING UNIV OF CHEM TECH
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