Method for fast characterizing compost maturity

A maturity and composting technology, applied in the preparation of test samples, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low correlation between fluorescence intensity and monitoring indicators, complex components of compost extracts, etc.

Active Publication Date: 2010-08-18
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, current researchers using 3D-EEM to characterize compost maturity have only minimally exploited the wealth of information provided by 3D-EEM
In addition, the composition of the compost extract is complex and contains different types of fluorescent groups; different types of fluorescent groups are superimposed on each other, resulting in a decrease in the correlation between fluorescence intensity and monitoring indicators

Method used

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  • Method for fast characterizing compost maturity
  • Method for fast characterizing compost maturity
  • Method for fast characterizing compost maturity

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Embodiment Construction

[0089] Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0090] 1) Sampling point. The samples were taken from the compost products of 60 different types of compost treatment plants in 9 provinces in my country (Table 4), including Inner Mongolia Autonomous Region (7 compost products), Jilin Province (5 compost products), Hebei Province (6 Compost Products), Shandong Province (9 Compost Products), Henan Province (7 Compost Products), Jiangsu Province (10 Compost Products), Hubei Province (8 Compost Products), Anhui Province (2 Compost Products) and Guangxi Zhuang Autonomous Region (6 compost products).

[0091] 2) Sample pretreatment. Collect about 20g of compost products from the compost treatment plant and divide them into 2 parts: one part (about 19g) is used to determine the conventional compost maturity indicators, namely organic matter content, germination index, oxygen consumption rate and CO 2 Generatio...

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Abstract

The invention discloses a method for fast characterizing the compost maturity, which belongs to the field of solid organic waste material treatment. The method comprises the following steps: collecting 1g samples for preparing compost water extraction liquid; testing the DOC of the compost water extraction liquid; diluting the compost water extraction liquid until the DOC is lower than 10 mg / L; collecting a three-dimensional fluorescence spectrum EEM spectrogram of the diluted compost water extraction liquid; adopting a DOMFluor toolkit for introducing the collected EEM spectrogram into a database on Matlab 7.0 software for carrying out parallel factor analysis; determining the scores of two ingredients with the excitation / emitting wavelengths of (230 and 330) / 410 and (220 and 280) / 340; then, multiplying the obtained scores by the sample diluting times; and introducing the result into a compost maturity discriminant relation for being used for characterizing the compost maturity. The method can fast monitor the compost maturity at low cost. At the same time, the method does not need chemical reagents during the compost maturity analysis, and only simple pretreatment procedures such as filtration or dilution and the like are needed.

Description

technical field [0001] The invention relates to a method for quickly characterizing the maturity of compost, specifically, by associating the three-dimensional fluorescence characteristics of soluble organic matter in the water extract of a compost treatment plant with the maturity of compost to quickly identify the maturity of compost. It belongs to the field of solid organic waste treatment and resource utilization. Background technique [0002] According to statistics, my country produces about 60 million tons of solid organic waste of nutrient resources every year, including livestock and poultry manure, crop straw, agricultural product processing leftovers, domestic sludge, kitchen waste and screened organic waste, etc., which are rich in nutrients. If the solid organic waste is not utilized but discarded anywhere, it will not only waste nutrient resources greatly, but also pollute the environment more seriously. If 50% of the solid organic waste produced in our country...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N1/34
Inventor 余光辉沈其荣罗轶红吴敏杰杨兴明冉炜
Owner NANJING AGRICULTURAL UNIVERSITY
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