Membrane pollution analogue simulation analysis method

Abstract

The invention discloses a membrane pollution analogue simulation analysis method. The membrane pollution analogue simulation analysis method can determine a final optimization model through system calculation and optimization by building a classic polymer membrane, an inorganic membrane and other membrane material models and inorganic, organic, colloid, microorganisms and other conventional pollutant models, by means of a Materials Studio software polymer module function, and builds a calculation interface model for different water solutions on the basis of the final optimization model. Meanwhile, the membrane pollution analogue simulation analysis method carries out reliable structure optimization and energy calculation on a designed operation basic environment aperiodic system and periodic systems such as membrane materials and pollutants in combination with molecular mechanics and dynamics methods, and regulates and controls operating parameters to obtain a series of two-dimensionaland three-dimensional result parameters such as membrane surface parameters, molecular configuration parameters, interaction parameters and water body solution components under long-term operation. The membrane pollution analogue simulation analysis method can perform various types of simulation on different water bodies and different membranes, and is flexible, simple and novel.

Description

technical field [0001] The invention belongs to the interdisciplinary field of material physics and relates to a membrane pollution simulation analysis method. Background technique [0002] Membrane separation technology is widely used in the field of water treatment due to its easy operation, low energy consumption and high efficiency. However, in the actual operation process, the biggest obstacle limiting its application is the membrane fouling problem in the filtration process. So far, ultrafiltration membrane fouling is mainly due to the fact that a large number of inorganic colloidal particles, dissolved organic macromolecules, and microorganisms in the sewage gradually deposit on the membrane surface due to adsorption, interception, etc. during the filtration process. Narrowing or clogging of membrane pores leads to a decrease in membrane flux and a sharp decline in membrane performance, which seriously reduces the service life of the membrane, thereby greatly increas...

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Problems solved by technology

However, in the actual operation process, the biggest obstacle limiting its application is the membrane fouling problem in the filtration process.

So far, ultrafiltration membrane fouling is mainly due to the fact that a large number of inorganic colloidal particles, dissolved organic macromolecules, and microorganisms in the sewage gradually deposit on the membrane surface due to adsorption, interception, etc. during the filtration process. Membrane pores are narrowed or blocked, resulting in a decrease in membrane flux and a sharp decline in membrane performance, which seriously reduces the service life of the membrane, thereby greatly increasing the frequency of membrane replacement, thereby increasing the operating cost of the system

The industrial method of measuring membrane replacement frequency is mainly through the decrease of flux and the decrease of effluent quality, but this method can only reflect the overall change of the membrane system, and cannot actually characterize the degree of contamination of the membrane module through long-term operation

Therefore, it is impossible to accurately and efficiently determine the frequency of membrane replacement

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