Membrane flux on-line prediction method for membrane bioreactor process

A technology of membrane bioreactor and prediction method, applied in biological systems, bioinformatics, instruments, etc., can solve problems such as excessive cleaning, affecting effluent water quality, and energy waste

CN108304692AActive Publication Date: 2018-07-20上海昊沧系统控制技术有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-07-20

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Abstract

A membrane flux on-line prediction method for a membrane bioreactor process is provided. The method comprises: 1) establishing a membrane flux model of a membrane module in a membrane bioreactor process; 2) embedding the membrane flux model in a simulation platform of the membrane bioreactor process; and 3) taking the on-line collected influent data and operational data as an input value to the simulation platform, and obtaining a membrane flux prediction result according to the membrane flux model. According to the method provided by the present invention, the influent water and the operational conditions are combined to carry out membrane flux on-line prediction, it is verified that the membrane flux prediction result is consistent with the trend of the measured result, and the real operational condition of the site can be ideally approached, so that the degree of membrane fouling of the membrane module can be informed of in real time, the effect of membrane cleaning can be predicted, and the prevention of membrane fouling can be facilitated.
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Description

technical field

[0001] The invention belongs to the technical field of sewage biochemical treatment and computer simulation, and in particular relates to an online prediction method of membrane flux of a membrane bioreactor process. Background technique

[0002] Membrane bioreactor process (referred to as MBR reactor or MBR process) is a widely used biochemical treatment process in the field of sewage treatment. It uses membrane modules to replace the solid-liquid separation of secondary sedimentation tanks. Through a certain membrane pressure, The solid matter in the suspension is trapped on the membrane module, and the water passes through the membrane module to separate the solid from the liquid. At the same time, it can maintain a high concentration of activated sludge suspension in the reactor to improve the efficiency of biochemical treatment.

[0003] Membrane flux is an important operating parameter in the MBR process, and its physical meaning is the amount of water ...

Examples

Embodiment Construction

[0300] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0301] In this embodiment, a continuous water-inflowing MBR reaction tank is used as the simulation object, and the volume of the reaction tank is 60m 3 , water intake 500m 3 / h. The pressure across the membrane is maintained at 10kPa, and the surface area of ​​the membrane module is 2000m 3 . Membrane surface has 100m 3 / h of cross-flow air through, backwash flow 75m 3 / h. On-line water flow and air flow are used as input values ​​to predict the change of membrane flux, membrane flow and filter cake production over time, and to verify the prediction by online measurement of membrane flow and regular detection of filter cake quality on the surface of membrane modules Effect.

[0302] See Table 2 for the reaction kinetics parameter values ​​(at 20° C.) in the mathematical expression method of the model established in this example, and see Table 3 ...