Synchronous rapid detection method of near-infrared spectroscopy for physical and chemical indicators of biogas slurry
A technology of near-infrared spectroscopy and physical and chemical indicators, which is applied in the field of synchronous and rapid detection of biogas slurry physical and chemical indicators near-infrared spectroscopy, can solve the problem of low search efficiency and achieve the effect of multiple detection contents, simultaneous rapid detection, and complete projects
Active Publication Date: 2019-12-31
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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However, the genetic algorithm has a premature problem, and the search efficiency is low in the later stage of evolution
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[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. A biogas slurry physical and chemical index near-infrared spectrum synchronous rapid detection method, the method comprises the steps of:
[0027] ①. Sample collection:
[0028] Take the biogas slurry in the semi-continuous anaerobic fermentation tank with normal gas production as the sample, sample once every 4 hours, the sampling volume is 40ml, and sample 30 days, a total of 180 samples are taken; after the sample is refrigerated and centrifuged at 6000r / min for 10min, the supernatant of the sample is taken liquid to be tested;
[0029] ②. Determination of physical and chemical indicators:
[0030] Take the supernatant of the sample and use traditional chemical methods to measure the content of chemical oxygen demand, volatile fatty acids and ammonia nitrogen; The content of acetic acid, propionic acid and total acid in the mixture is meas...
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The biogas slurry physical and chemical index near-infrared spectrum simultaneous rapid detection method belongs to the detection technology of anaerobic fermentation liquid; this method adopts sample collection, physical and chemical index determination, near-infrared spectrum After the wavelength is optimized, the spectral data of the calibration set are respectively used to establish the corresponding partial least squares regression model according to the characteristic wavelengths of biogas slurry chemical oxygen demand, volatile fatty acids, and ammonia nitrogen physicochemical indicators optimized by the dual genetic simulated annealing algorithm, and use the verification set to analyze Evaluate the accuracy of the regression model, establish a rapid detection model, centrifuge the biogas slurry sample that needs to detect physical and chemical indicators, take the supernatant for near-infrared spectrum scanning, and then input the detection model according to the optimal characteristic wavelength of the corresponding physical and chemical indicators to complete the biogas slurry physicochemical The indicators are detected synchronously and quickly; this method has fast detection speed, high precision and complete detection items.
Description
technical field [0001] The invention belongs to the detection technology of anaerobic fermentation liquid, and mainly relates to a near-infrared spectrum synchronous rapid detection method of biogas liquid physical and chemical indicators. Background technique [0002] With the rapid development of my country's agriculture and animal husbandry, a large amount of organic waste such as crop straws and livestock manures have been produced, and the environmental pollution problems caused by this have become increasingly prominent. As a clean biomass energy technology, biogas production by anaerobic fermentation is an important means and development direction to realize the resource utilization of agricultural and animal husbandry organic waste, improve the environment, and solve energy problems. Since biogas fermentation is an extremely complex biochemical process, how to efficiently use agricultural and animal husbandry waste to ferment biogas is a major challenge for agricultu...
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IPC IPC(8): G01N21/3577G01N21/359
CPCG01N21/3577G01N21/359
Inventor 刘金明王娜程秋爽孙勇
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY