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A method for improving L-glucose anaerobic degradation

A technology of glucose and anaerobic fermentation, applied in chemical instruments and methods, water/sludge/sewage treatment, biological sludge treatment, etc., can solve the problem of L-glucose refractory degradation, improve the degradation efficiency and improve the degradation rate , Improve the effect of acidification products

Active Publication Date: 2020-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of chemical synthesis industry and the wide application of L-glucose, more and more L-glucose will appear in the environment, but L-glucose is difficult to be degraded by environmental microorganisms

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] After the municipal sludge was sieved to remove large impurities, it was left to stand for 24 hours and concentrated to VSS 12 g / L (TSS≈17 g / L, pH≈7.0). The above sludge was washed repeatedly with distilled water for 3 times and used as the original inoculation Sludge, the sludge acclimatized for about 4 weeks under the condition that the concentration of L-glucose is 100 mg / L is used as the acclimatized sludge. The concentration of the substrate L-glucose was 500 mg / L, the concentration of L-cysteine ​​was 50 mg / L, and a certain amount of domesticated sludge was added to make the VSS of the anaerobic reaction mixture system 1000 mg / L. The pH was adjusted to 6.0, the temperature was 37°C, and anaerobic fermentation was carried out for 5 days. The degradation rate of L-glucose was 100%, and the degradation rate was 94.2 mg / L / d. 1.6 times and 1.5 times that of the blank group without adding L-cysteine.

Embodiment 2

[0017] The concentration of the substrate L-glucose was 500 mg / L, and 50 mg / L of L-cysteine ​​was added, the pH was adjusted to 5, the temperature was 37°C, and the anaerobic fermentation was carried out for 5 days. Other operations were the same as in Example 1. The degradation rate of the obtained L-glucose was 47.3%, and the degradation rate was 46.6 mg / L / d. Compared with the blank group, the degradation rate and degradation rate of the obtained L-glucose increased by 44% and 46%.

Embodiment 3

[0019] The concentration of the substrate L-glucose was 500 mg / L, and 50 mg / L of L-cysteine ​​was added, the pH was adjusted to 7, the temperature was 37°C, and the anaerobic fermentation was carried out for 5 days. Other operations were the same as in Example 1. The degradation rate of the obtained L-glucose was 74.1%, and the degradation rate was 71.5 mg / L / d. Compared with the blank group without adding L-cysteine, the degradation rate and degradation rate of the obtained L-glucose increased by 1.8 times and 1.9 times.

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PUM

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a method for enhancing L-glucose anaerobic degradation efficiency. The method comprises the following steps: adding sewage plant sludge and L-glucose into a reactor, wherein the sludge concentration (VSS) is 1000-2000 mg / L; and carrying out microbial acclimatization, adding amino acid, and carrying out anaerobic fermentation with stirring at 25-37 DEG C for 4-8 days while controlling the pH value at 6-7, thereby obviously enhancing the L-glucose anaerobic degradation efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for improving the anaerobic degradation of L-glucose. Background technique [0002] Sugars are the basic building blocks of most organic waste. For example, the content of polysaccharides in municipal sludge accounts for about 20-40% of the total volatile organic compounds; in brewing wastewater such as cassava distillers grains, the content of polysaccharides accounts for more than 30% of the dissolved COD. During anaerobic digestion, polysaccharides are dissolved and hydrolyzed into monosaccharides, which in turn are transformed into volatile fatty acids and methane. Studies have shown that there are two configurations in the monosaccharides produced by the hydrolysis of certain polysaccharides; and organic matter with different configurations shows different fermentation characteristics during anaerobic fermentation. Taking glucose as an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04
CPCC02F11/04C02F2101/34
Inventor 刘辉其他发明人请求不公开姓名
Owner TONGJI UNIV