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Method for measuring VFA concentration in anaerobic wastewater treatment process by means of near infrared spectrum

A near-infrared spectroscopy and near-infrared spectrometer technology, applied in the field of wastewater treatment and monitoring, can solve the problems of secondary pollution, time-consuming, labor-intensive, etc.

Inactive Publication Date: 2016-08-24
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology

[0002] Anaerobic treatment is one of the common means of wastewater treatment. In order to realize the control of the stable operation of the reactor in the process of anaerobic treatment, it is necessary to monitor the intermediate product VFA (volatile fatty acid, ie volatile fatty acid) in the anaerobic reaction. Traditional chemical analysis methods are time-consuming, labor-intensive, and lagging behind, and the consumed reagents are prone to secondary pollution

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  • Method for measuring VFA concentration in anaerobic wastewater treatment process by means of near infrared spectrum
  • Method for measuring VFA concentration in anaerobic wastewater treatment process by means of near infrared spectrum
  • Method for measuring VFA concentration in anaerobic wastewater treatment process by means of near infrared spectrum

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Embodiment 1

[0030] The method for measuring the VFA concentration in the wastewater anaerobic biological treatment process of the present embodiment comprises the following specific steps:

[0031] (1) Select 84 wastewater samples in the typical cycle of wastewater anaerobic biological treatment. Among them, 60 water samples were first determined the concentration value of VFA in the water sample by gas chromatography, and then collected the near-infrared spectrum of the water sample to obtain the original near-infrared spectrum data (such as figure 1 shown);

[0032] (2) Use wavelet transform to preprocess the original spectrum, remove part of the noise and irrelevant information in the original spectrum, and obtain the preprocessed near-infrared spectrum (such as figure 2 shown);

[0033] (3) Using the interval partial least squares method, using the VFA concentration of the 60 water samples and the pretreated spectrograms of the 60 water samples, a calibration model for the near-inf...

Embodiment 2

[0040] The method for measuring the VFA concentration in the wastewater anaerobic biological treatment process of the present embodiment comprises the following specific steps:

[0041] (1) Select 84 wastewater samples in the typical cycle of wastewater anaerobic biological treatment. Among them, 60 water samples were first measured by gas chromatography to measure the concentration of VFA in the water samples, and then the near-infrared spectra of the water samples were collected to obtain the original near-infrared spectral data;

[0042] (2) Use wavelet transform to preprocess the original spectrum, remove part of the noise and irrelevant information in the original spectrum, and obtain the preprocessed near-infrared spectrum;

[0043] (3) Using the interval partial least squares method, using the VFA concentration of the 60 water samples and the pretreated spectrograms of the 60 water samples, a calibration model for the near-infrared spectral data of the sewage samples wa...

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Abstract

A method for measuring the VFA concentration in the anaerobic wastewater treatment process by means of near infrared spectrum comprises the steps of 1, taking N wastewater samples in the anaerobic wastewater treatment process within the typical cycle, measuring the VFA concentration of the N wastewater samples with the gas chromatographic method, and measuring the original near infrared spectrum of the N wastewater samples by means of an near infrared spectrometer; 2, pretreating original near infrared spectrum data through wavelet transform; 3, establishing a calibration model based on the VFA concentration of the N wastewater samples and a pretreated spectrogram by means of interval partial least squares, calculating the correlation coefficient, adopting the calibration model when the correlation coefficient is larger than or equal to 0.945, and repeating step 1-3 and conducting modeling again and correlation evaluation otherwise; 4, measuring the original near infrared spectrum of a wastewater sample to be measured, conducting pretreatment, and substituting pretreated spectrum data into the calibration model to obtain a VFA concentration value. The method is convenient to operate, low in cost, environmentally friendly, and capable of obtaining a result quickly and effectively.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and monitoring, in particular to a method for measuring VFA concentration in wastewater anaerobic treatment by using near-infrared spectroscopy. Background technique [0002] Anaerobic treatment is one of the common means of wastewater treatment. In order to realize the control of the stable operation of the reactor in the process of anaerobic treatment, it is necessary to monitor the intermediate product VFA (volatile fatty acid, ie volatile fatty acid) in the anaerobic reaction. Traditional chemical analysis methods are time-consuming, labor-intensive, and lagging behind, and the consumed reagents are prone to secondary pollution. Therefore, it is urgent to research and develop a new method for detecting VFA in the anaerobic treatment of wastewater in this field. Contents of the invention [0003] In view of this, the object of the present invention is to provide a method for mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/3577
CPCG01N21/359G01N21/3577
Inventor 黄健黄显怀杨伟伟张华张勇王坤陶勇闫升刘沛然
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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