Method for identifying PVDF (polyvinylidene fluoride) membrane pollutants in MBR (membrane bioreactor) process

Abstract

The invention discloses a method for identifying PVDF (Polyvinylidene Fluoride) membrane pollutants in an MBR (Membrane Bioreactor) process, which comprises the following steps: measuring and collecting membrane clear water flux data, energy spectrum analysis data, Fourier transform attenuated total reflection infrared spectrum image data, scanning electron microscope data and thermogravimetric curve data of cleaning membrane filaments under different pressure difference forces, and establishing a basic database; judging whether the membrane pollutants can be stripped from the membrane surface or not; if the pollutants can be stripped, carrying out X-ray diffraction analysis, and determining pollutant components; if not, carrying out thermogravimetric analysis; and judging the types of the membrane pollutants according to the TG% curve. The pollutant identification method aiming at the PVDF membrane is provided by utilizing the characteristics such as the infrared spectrum and the thermogravimetric curve of the membrane pollutants, so that the types of the pollutants on the polluted membrane filaments can be more accurately judged, and the targeted cleaning of the membrane pollutants is realized.

Description

technical field [0001] The invention relates to the technical field of membrane pollution identification, in particular to an identification method for PVDF membrane pollutants in an MBR process. Background technique [0002] Membrane fouling is a prominent problem that hinders the widespread application of membrane separation technology. In the MBR sewage treatment process, after the membrane is affected by pollution, there will be problems such as performance degradation, reduced separation effect, and increased operating costs. Due to the inevitability of membrane fouling, after a certain period of operation, the membrane fouling substances must be cleaned by physical or chemical methods to ensure the separation effect. In the engineering application of the MBR process, users are more concerned about how to find out what the main pollutants are after the membrane is polluted, and how to clean the membrane to restore the membrane flux. [0003] Therefore, it is necessary...

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Problems solved by technology

[0002] Membrane fouling is a prominent problem hindering the widespread application of membrane separation technology

In the process of MBR sewage treatment, after the membrane is affected by pollution, there will be problems such as performance degradation, reduced separation effect, and increased operating costs.

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