Multi-dimensional multi-phase multi-process coupling analog method of activated sludge sewage treatment

A technology of activated sludge and simulation methods, applied in the field of coupled simulation of biological processes, chemistry, and physics in activated sludge water treatment, can solve problems such as no coupling found

Active Publication Date: 2013-04-17
PEKING UNIV
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Problems solved by technology

At the same time, aeration is also a crucial step in the process of sewage treatment. Aeration provides sufficient dissolved oxygen for the aerobic reaction of activated sludge by filling air or oxygen into the activated sludge reactor. Therefore, from this pe

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  • Multi-dimensional multi-phase multi-process coupling analog method of activated sludge sewage treatment
  • Multi-dimensional multi-phase multi-process coupling analog method of activated sludge sewage treatment
  • Multi-dimensional multi-phase multi-process coupling analog method of activated sludge sewage treatment

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[0067] The present invention will be further described in conjunction with specific examples, but the present invention is not limited to the following examples.

[0068] The simulation object of this example is a four-corridor Kanusel oxidation ditch at the pilot scale, such as figure 1 shown. The total length of the oxidation ditch is 2.2m, the width is 1.4m, the effective water depth is 0.5m, and the effective volume is 1.4m 3 ; The length of the straight ditch is 1.05m, the radii of the big and small bends are 0.35m and 0.7m respectively, and the width of the single ditch is 0.35m. The water inlet section of the oxidation ditch is a rectangle with a length of 200mm and a width of 50mm; 3 The flow rate per hour flows into the oxidation ditch, and the water quality indicators of the sewage flowing into the oxidation ditch are: COD=250mg / L, ammonia nitrogen=50mg / L, nitrate nitrogen=0mg / L. The water flow in the ditch is driven by the pushers located at the end of the first ...

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Abstract

The invention discloses a multi-dimensional multi-phase multi-process coupling analog method of activated sludge sewage treatment. According to the -dimensional multi-phase multi-process coupling analog method, based on a multi-phase flow theory, activated sludge used as a solid phase, a gas phase (bubbles) aerated in an activated sludge system and a liquid phase (sewage) form a three-phase composite system, a sludge-water-gas movement characteristic and an interphase physical function in a sewage treatment system are reasonably described by adopting a multi-phase flow movement equation; and meanwhile, an oxygen mass transfer equation and a pollutant migration and transformation equation are further combined, and a distribution characteristic of dissolved oxygen in a system, a migration and transformation characteristic of pollutants and an interphase biochemical action characteristic are accurately predicted. By adopting a coupling model disclosed by the invention, the part of an activated sludge system, at which sludge easily deposits, and effluent quality conditions under different working conditions can be quantitatively predicted, and the great significance is achieved for the maintenance of normal operation in a sewage treatment plant.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to a physical, chemical and biological process coupling simulation method in activated sludge water treatment. Background technique [0002] At present, the situation of water pollution in our country is very serious. According to the monitoring results of the environmental department, the water quality of more than half of the seven major river systems in my country is polluted, 1 / 3 of the water bodies in the country are not suitable for fish survival, 1 / 4 of the water bodies are not suitable for irrigation, and 90% of urban waters are seriously polluted. 50% of urban water sources do not meet drinking water standards, 40% of water sources are no longer drinkable, and the main pollutants are ammonia nitrogen and COD Mn , BOD, volatile phenols and petroleum substances. Therefore, strictly controlling the discharge of sewage up to the standard and effectively i...

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 倪晋仁雷立
Owner PEKING UNIV
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