Soft-measurement method for volatile fatty acid in effluent of anaerobic wastewater treatment system

Abstract

The present invention relates to a soft-measurement method for volatile fatty acid in effluent of an anaerobic wastewater treatment system. The method uses principal component analysis to realize dimensionality reduction of high-dimensional auxiliary variables and uses a least squares support vector machine which is particularly suitable for solving problems like small samples, nonlinearity and local minimum points and is high in training speed. The combination of the two realizes the soft-measurement of volatile fatty acid in the effluent of the anaerobic wastewater treatment system, and is of great significance to online monitoring and subsequent process optimization controlling of the anaerobic wastewater treatment system. Experiments have proved that, the model of the soft-measurement method is correct in theory and the application of an LS-SVM intelligent algorithm enables real-time prediction and estimation of the important control parameter, the volatile fatty acid, of the effluent of the anaerobic wastewater treatment system. The method can solve the problems of expensive measuring apparatuses, difficult maintenance and measuring lags, and is of great importance to the control and optimization of the anaerobic wastewater treatment system.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a soft measurement method for volatile fatty acids in anaerobic wastewater treatment system effluent. Background technique [0002] Energy crisis and environmental pollution are two major challenges facing mankind at present. Anaerobic biotechnology can decompose complex organic substances in wastewater into biogas and other energy substances. Therefore, anaerobic biotechnology provides a feasible way to solve energy and environmental problems. way. As a representative of anaerobic biotechnology, anaerobic fermentation methane production technology has broad application prospects in high-concentration organic wastewater and organic solid waste. Methane production by anaerobic fermentation is a complex biochemical process. Methanogens, in particular, have strict requirements on environmental conditions. It is difficult to maintain the efficient, fast and stable opera...

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Problems solved by technology

Principal component analysis realizes the dimensionality reduction processing of high-dimensional auxiliary variable variables, and the least squares support vector machine pair is especially suitable for solving problems such as small samples, nonlinearity, and local minimum points, and the training speed is fast. The combination of the two realizes anaerobic wastewater treatment. The soft measurement of volatile fatty acids in the treatment system is of great significance for the on-line monitoring of the anaerobic wastewater treatment system and the subsequent process optimization control. At the same time, it has guiding significance for other indicators that are difficult to monitor online in the anaerobic wastewater treatment system

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