Method and device for online optimized control of operation of two-sludge denitrifying dephosphatation process

Abstract

The invention belongs to the technical field of sewage treatment and discloses a method and a device for online optimized control of the operation of a two-sludge denitrifying dephosphatation process. The method disclosed by the invention comprises the following steps of: detecting change rates of ORP (Oxidation Reduction Potential), DO (Dissolved Oxygen) and pH in a biochemical reaction process at each stage as well as the quantitative relationship among the change rates and anaerobic phosphate release, anoxic denitrification phosphorus-uptake and aerobic nitrification reaction; determining an ORP fuzzy control range for feeding a carbon source at the anaerobic stage, a pH fuzzy control range of the aeration time at the aerobic nitrification stage and a pH fuzzy control range of anoxic stirring time according to a detection result; carrying out calculation on controlled quantity deviation and fuzzification and comparing the calculation with a traditional fuzzy control rule; carrying out a fuzzy control reasoning by adopting a Mamdani fuzzy calculation method to obtain a fuzzy control variable; controlling the feeding amount of the carbon sources according to the ORP dynamic change rule at the anaerobic stage and dynamically calculating the concentration of inflow ammonia nitrogen according to the DO concentration in the aerobic nitrification process, thereby controlling the aerobic nitrification aeration time; meanwhile, dynamically controlling the hydraulic power residence time at each stage by combining pH and ORP curve types at anaerobic / anoxic stages.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to an on-line optimization control method and a device for the operation of a double-sludge denitrification phosphorus removal process. Background technique [0002] At the same time of rapid economic development, it is not uncommon to report that many areas suffer from different degrees of water pollution. The pollution of the water environment is mainly manifested as the eutrophication of the water body. Therefore, the eutrophication of the water body caused by the excessive discharge of nitrogen and phosphorus has become one of the most concerned environmental problems by relevant people. How to effectively remove nitrogen and phosphorus in sewage Nutrients such as nutrients have already been put on the government's agenda. Although physical, chemical, biological and combined methods can achieve good phosphorus removal effects, physical methods such as electrolysis and ad...

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Problems solved by technology

[0007] Aiming at the problem of the amount of external carbon source required for synchronous denitrification and phosphorus removal in the existing technology; the problem of incomplete denitrification reaction due to insufficient hydraulic retention time in the anoxic stage; to ensure complete nitrification of ammonia nitrogen, while saving aeration as much as possible The problem of water quality; the problem of unstable system operation due to large fluctuations in influent water quality; the purpose of the present invention is to provide an online optimization control method for the operation of double sludge denitrification phosphorus removal process

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