Intelligent control system and method for membrane pollution caused by nitrogen and phosphorus removal and dosing coupling in MBR (Membrane Bioreactor) process

Abstract

The invention provides an MBR process denitrification and dephosphorization dosing coupling membrane pollution intelligent control system and method, and belongs to the technical field of sewage treatment equipment, and a control cabinet integrates a denitrification and dosing control module, a dephosphorization and dosing control module and a membrane pollution control module. Wherein the membrane pollution control module controls the sludge discharge amount of a membrane tank, maintains the sludge concentration of the membrane tank to be stable, and feeds back a real-time signal to the denitrification and dephosphorization dosing control module at the same time for correcting and calculating the dosage of a carbon source and a dephosphorization agent. The dosing control module realizes deep nitrogen and phosphorus removal, the influence of MBR process sludge property difference, reaction kinetics and the like is considered, the membrane pollution control module can effectively prevent membrane pollution, and the dosing control module and the membrane pollution control module are effectively combined to jointly realize stable and up-to-standard nitrogen and phosphorus control of effluent, energy conservation, consumption reduction, timely membrane pollution early warning and stable membrane process operation.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to an intelligent control system and method for membrane pollution coupled with denitrification, dephosphorization and dosing in an MBR process. Background technique [0002] Most sewage treatment plants need to add carbon sources and phosphorus removal agents to ensure that the nitrogen and phosphorus in the effluent meet the standards. At present, the operation of sewage plants mainly depends on manual dosing. Up to standard. Second, the phenomenon of excessive dosing is serious, and the economic cost is relatively high, which is not conducive to the sustainable production of water plants. Intelligent dosing systems have been developed successively to replace manual work and realize automatic dosing, which not only stabilizes water quality but also saves the amount of medicine. The intelligent dosing system consists of software models and hardware devices. Ha...

AI Technical Summary

Problems solved by technology

[0002] Most sewage treatment plants need to add carbon sources and phosphorus removal agents to ensure that the nitrogen and phosphorus in the effluent meet the standards. At present, the operation of sewage plants mainly depends on manual dosing. up to standard

Second, the phenomenon of excessive dosing is serious and the economic cost is high, which is not conducive to the sustainable production of water plants

[0003] At present, the ASM series models used in the simulation calculation and control models of the sewage treatment process have the following problems: first, the adaptability of the models in domestic water plants is not ideal, mainly caused by differences in water quality and sludge properties; second, the models are inconvenient to use, Mainly because the model has many parameters, the debugging cycle is long, and the maintenance requirements and costs are high

Third, the application scenarios of most of the existing control models are limited to traditional AAO, UCT and other processes. The standards for effluent total nitrogen and total phosphorus are loose, and the control value of effluent concentration is relatively high.

In addition, membrane fouling control is the key to the operation of the MBR process. Adding chemicals will increase the sludge concentration of the system, accelerate membrane fouling, and affect the normal operation of the membrane system.

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