Cleaning control method and system and corresponding moving bed biofilter reactor system

Abstract

The invention relates to a cleaning control method and system and a corresponding moving bed biofilter reactor system. The method is suitable for cleaning control of a moving bed biofilter reactor (MBFR). According to daily accumulated water inlet amount, water inlet CODCr, water outlet CODCr, water inlet suspended matters, water inlet suspended matters and empirical parameters obtained by a monitoring device, the duration time of single cleaning is calculated, cleaning control is conducted accordingly, and the cleaning system automatically enters the cleaning execution and cleaning intermittent stage. The cleaning system is provided with a control device for realizing the method, the monitoring device for monitoring required data and an execution device for supplying air to the reactor under the control of the control device, and the moving bed biofilter reactor cleaning system adopts the method to perform cleaning control on the reactor. The cleaning intensity can be dynamically adjusted according to the actual situation, so that the dynamic balance of the microbial biomass in the system is kept, the cleaning water consumption is reduced, and the treatment stability is improved.

Description

Technical field [0001] The invention relates to a sewage treatment system and a control method, including a cleaning control method suitable for a moving bed biological filter reactor, a control system suitable for the cleaning control of a moving bed biological filter reactor using the method, and the use of such cleaning Control method and control system of a moving bed biological filter reactor system. Background technique [0002] The moving bed biological filter reactor (MBFR) is a new type of biofilm reactor developed on the basis of the fixed bed biological aerated filter. The principle of degradation of pollutants is the same as that of the fixed bed biological aerated filter. It is composed of filter tank, water distribution system, aeration system, lifting cleaning system, etc. The reactor is filled with uniform granular filter material as the carrier of biofilm, and the biofilm attached to the filter material is used to adsorb pollutants in sewage And decompose to rem...

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Problems solved by technology

[0012] 1) When the water quality changes drastically, it is necessary to manually adjust the cleaning parameters frequently, and control the cleaning speed by adjusting the air volume. When the air volume is too small, it is difficult to lift the filter material; when the air volume is too large, the cleaning effect of the filter material is poor, affecting the water output Water quality; at the same time, the adjustment operation is more complicated and imprecise, and the human factors are greatly affected, so it is difficult to achieve follow-up adjustment or even make mistakes;

[0013] 2) Under low processing load, the intensity of continuous lifting and cleaning of the filter material is too large, which will cause too little microbial biomass in the filter tank, and the processing efficiency and impact resistance will decrease;

[0014] 3) Under low load, the water consumption of continuous cleaning of filter material is higher

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