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Method for extracting carbon source from kitchen solid residues through enzymic method

An enzymatic extraction and cooking technology, applied in chemical instruments and methods, solid waste removal, special compound water treatment, etc., can solve problems such as environmental hazards, poor system stability, toxic and harmful substances, etc. The effect of alleviating short supply and improving stability

Active Publication Date: 2020-08-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatment technologies have some defects, among which anaerobic fermentation is considered to be the most effective treatment process at present, but there are also problems such as poor system stability, difficult treatment of biogas residue and biogas slurry, and production of toxic and harmful substances.
After three-phase separation, the kitchen solid residue is mainly converted into biogas energy through anaerobic digestion technology. However, due to the high protein content of the kitchen solid residue, the concentration of ammonia nitrogen in the biogas slurry after anaerobic treatment is very high. , biogas slurry denitrification technology is difficult and costly, and will cause serious harm to the environment, which has become a major problem in the process of food waste treatment

Method used

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  • Method for extracting carbon source from kitchen solid residues through enzymic method
  • Method for extracting carbon source from kitchen solid residues through enzymic method
  • Method for extracting carbon source from kitchen solid residues through enzymic method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Analyze the composition of the food solid residue raw material (the solid residue obtained from a company in Zhangjiagang after mechanical sorting, pulping, three-phase separation and other pretreatments). The solid residue is mainly composed of crude protein, carbohydrates, and crude fat and other impurities, and other impurities are mainly crude fibers, as shown in Table 1 below:

[0053] Table 1 The main components of the kitchen (g / 100g dry weight)

[0054]

[0055] A kind of method (as figure 1 shown), including the following steps:

[0056] (1) Pretreatment: Take the kitchen solid slag raw material and put it into a mortar for grinding for about 5 minutes. After grinding and crushing, the average particle size of the kitchen solid slag is about 99.19 μm; Seal it with a parafilm, place it in a 120°C high-temperature sterilization pot for 20 minutes, and obtain sterilized kitchen solid residue;

[0057] (2) Regulating the moisture content of the kitchen solid ...

Embodiment 2

[0065] The optimization of the ratio of embodiment 2 enzymes

[0066] Adjust the mass ratio of the medium-temperature α-amylase and amyloglucosidase in Example 1 as shown in Table 2, and keep other parameters consistent with Example 1 to obtain a carbon source extract. The obtained carbon source extract is subjected to a performance test, and the test results are shown in Table 2:

[0067] Table 2 The performance test of the carbon source extract obtained by the mass ratio of different mesophilic α-amylase and amyloglucosidase

[0068]

Embodiment 3

[0069] The optimization of embodiment 3 pH

[0070] Adjust the pH of Example 1 as shown in Table 3, and keep the other parameters consistent with Example 1 to obtain a carbon source extract. The obtained carbon source extract is subjected to a performance test, and the test results are shown in Table 3:

[0071] The performance test of the carbon source extract solution that table 3 different pH obtains

[0072]

[0073]

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Abstract

The invention discloses a method for extracting a carbon source from kitchen solid residues through an enzymic method, and belongs to the technical field of kitchen waste resource utilization. The method for extracting the carbon source from the kitchen solid residues through the enzymic method comprises the following steps of water is added into the kitchen solid residues; gelatinization is carried out; the pH is adjusted; diastasum diastace is added; hydrolysis is carried out; centrifugal separation is carried out; and a carbon source extracting solution is obtained or the solid residues arehydrolyzed. According to the method, the enzymic method is adopted for extracting and recycling starch and other carbohydrate in the kitchen solid residues, the starch and other matter in a solid phase are converted into saccharides capable of being dissolved in water, the extracting solution obtained by hydrolyzing the kitchen solid residues through the diastasum diastace is mainly composed of oligosaccharide, reducing sugar and other micromolecular sugar, and can serve as the carbon source for biological denitrification of a sewage treatment plant. In addition, the kitchen solid resides arecatalytically hydrolyzed by the diastasum diastace, the size of the kitchen solid residues is reduced, and while organic matter in the kitchen solid residues is separated and recycled, kitchen wasteis reduced.

Description

technical field [0001] The invention relates to a method for enzymatically extracting carbon sources from solid kitchen slag, and belongs to the technical field of resource utilization of kitchen waste. Background technique [0002] The amount of kitchen waste in my country accounts for about 37% to 62% of urban domestic waste. The growth rate and the proportion of domestic waste are increasing year by year, causing various harms to the ecosystem and the environment. After sorting, crushing, high-temperature cooking and pulping, the food waste is separated into crude oil, food thick pulp and food solid residue by a three-phase separator. Among them, kitchen solid residues are rich in carbohydrates and basically free of fat and salt. On the one hand, its compositional characteristics make it highly susceptible to decay, which can have a bad impact on the environment. On the other hand, kitchen solid residues are rich in organic matter and have high resource recovery and uti...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C12P19/14C12P19/00C02F3/28
CPCB09B5/00C12P19/14C12P19/00C02F3/28C02F2305/06B09B3/80
Inventor 黄振兴赵淑兰阮文权缪恒锋赵明星
Owner JIANGNAN UNIV
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