A rapid detection method for dewatering performance of anaerobic digestion

By employing FTIR technology and peak fitting methods, the problem of low detection efficiency of anaerobic digester dehydration performance has been solved, enabling rapid and accurate assessment of dehydration performance. This method is applicable to biomass waste with high moisture content and poor structure.

CN120847015BActive Publication Date: 2026-06-26TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TONGJI UNIV
Filing Date
2025-06-26
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies cannot efficiently and in large quantities detect the dehydration performance of anaerobic digesters, and the test results are not reproducible. In particular, the CST and SRF methods are time-consuming and require a large amount of sample, making them unsuitable for biomass waste with high moisture content and poor structure.

Method used

Fourier transform infrared spectroscopy (FTIR) combined with attenuated total reflectance mode (ATR-FTIR) and infrared spectroscopy analysis software were used to calculate the area ratio of OH bending vibration related sub-peaks in the wavelength range of 1550-1750 cm⁻¹ using peak fitting technology. The dehydration performance of anaerobic digests was characterized by the ∑p₁⁻²/∑p₃⁻⁶ ratio.

Benefits of technology

It enables rapid and accurate detection of the dehydration performance of anaerobic digests, requires small sample volumes, is low in cost, takes only a few minutes to detect, and has good reproducibility, making it suitable for batch testing.

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Abstract

The application provides a kind of anaerobic digestion residue dewatering performance rapid detection method, belong to the technical field of biomass waste dewatering performance detection.Specifically: collect anaerobic digestion in 400-4000cm ‑1 Wavelength range of full-band infrared spectrum data;Using infrared spectrum analysis software to obtain the infrared spectrum data is smoothed;According to the data obtained, select 1550-1750cm ‑1 Wavelength range of infrared water spectrum data related to O-H bending vibration, Gaussian deconvolution and peak fitting are carried out using peak fitting software, and are decomposed into six sub-peaks, p1-p6;And calculate the area ratio of each sub-peak, and the ratio of the area ratio of sub-peak 1-2 and sub-peak 3-6 is represented by the sum of the area ratio of sub-peak 1-2 and sub-peak 3-6, and the value is higher, which means it is more difficult to dewater.The infrared detection method of the application has the advantages of clean, efficient, low dose, low cost, batch detection, etc.
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