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A method for measuring the evolution process of humic acid substances in the composting process

An evolution process and substance technology, applied in the field of compost humic acid change characterization, can solve the problems of characterization of humic acid change, and achieve the effect of accurate evaluation results, small sample size, and easy and simple operation

Active Publication Date: 2020-12-22
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more advanced method for characterizing the kinetics of humic acid in compost materials is the EEM-PARAFAC analysis method, which can divide humic acid in compost into several components, and characterize the components in compost by comparing the percentage changes of each component. Changes during the composting process; but the disadvantage of this method is that most of the humic acid components analyzed by EEM-PARAFAC contain two fluorescent peaks, so only the change in the percentage of each component cannot characterize the real humic acid in detail. changes in

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  • A method for measuring the evolution process of humic acid substances in the composting process
  • A method for measuring the evolution process of humic acid substances in the composting process
  • A method for measuring the evolution process of humic acid substances in the composting process

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specific Embodiment approach 1

[0015] Specific embodiment one: the method for measuring the evolution process of humic acid substances in the composting process in this embodiment is carried out according to the following steps:

[0016] 1. Obtain the compost aqueous solution containing humic acid substances in different periods to obtain the dissolved organic matter aqueous solution;

[0017] 2. Add water to adjust the aqueous solution of dissolved organic matter until the concentration of DOC in the aqueous solution is uniform, then scan the three-dimensional fluorescence spectrum, and export the data;

[0018] 3. Paste the three-dimensional fluorescence spectrum data of dissolved organic matter (DOM) in the compost to the fl.csv file in the DOMFluor toolkit, perform PARAFAC analysis to determine the fluorescent components of humic acid, and extract the fluorescent components of each humic acid substance Exloadings data;

[0019] 4. Perform 2DCOS analysis on the Ex loadings data of the fluorescent compon...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 2, the DOC concentration of the aqueous solution of dissolved organic matter is uniformly adjusted to 10 mg / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 2, the scanning speed of the three-dimensional fluorescence spectrum is 1200 nm / min, and the slit width is set to 5 nm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for determining evolution of substances in a composting process, in particular to a method for determining the evolution process of humic acid substances in the composting process and provides a novel characterization method for evolution of organic waste compost humic acid. The method comprises the steps as follows: 1, collecting a composting sample and preparing a humic acid sample solution; 2, performing 3D fluorescence spectrum scanning; 3, performing PARAFAC analysis on 3D fluorescence spectrum data by use of a DOMFlour toolkit of Matlab; 4, analyzing Ex loadings data of each sampling time humic acid component output by PARAFAC by use of 2DCOS, and analyzing the specific change condition of each output fluorescence component of humic acid in the composting process through 2DCOS. With the adoption of the method, small sample quantity is required, the specific change condition of each fluorescence peak of the humic acid components can be obtained in detail, the method is easier and simpler to operate and takes short time, and the evolution condition of each fluorescence peak of each fluorescence component in the composting process can be analyzed precisely.

Description

technical field [0001] The invention relates to a method for characterizing the change of compost humic acid. Background technique [0002] Treating organic waste in the way of composting can transform the unstable substances in the waste into compost products with stable properties and harmless to crops through the action of microorganisms, so as to realize the recycling of waste. However, during the composting process, bacteria mainly use the organic matter in the compost material to convert humic acids, so it is very important to characterize the fate of humic acids in the composting process. [0003] Due to the complex changes of substances in the composting process, and the composition of humic acid substances in composting materials is not uniform. Therefore, it is difficult to characterize the evolution of humic acids during composting. At present, the more advanced method for characterizing the kinetics of humic acid in compost materials is the EEM-PARAFAC analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/6456
Inventor 魏自民崔洪洋赵越贾立明于会彬李艳杰
Owner NORTHEAST AGRICULTURAL UNIVERSITY