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Simulation System of Fluid and Solid Two-Phase Turbulent Flow and Biological Reaction in Oxidation Ditch

Author: ChenYuan
Tutor: ZhangDaiJun
School: Chongqing University
Course: Environmental Science
Keywords: Liquid-solid two -phase turbulent Activated Sludge Model Simulation Parameter Confirmation Carrousel oxidation ditch
CLC: X703
Type: Master's thesis
Year: 2008
Downloads: 136
Quote: 2
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Abstract


Biological wastewater treatment projects involving complex hydraulics and biochemical processes , the design optimization and operational control is the current frontier of scientific and technological research in international water . Sludge settling in variable hydraulic conditions have yet to form a recognized test methods , existing water environment simulation software still can not effective simulation and computation of the reaction process of the multiphase turbulence biological complex boundary conditions . Papers based on image analysis methods to develop a new set of sludge sedimentation rate measurement methods and devices used in different hydraulic conditions ( static / dynamic water ) all kinds of sludge ( discrete particles and flocculating ) sedimentation rate test . Two-phase turbulent mixture model described in the activated sludge - waste water hydraulic characteristics of the two-phase , two-phase model with activated sludge the 2nd model (ASM2) coupled to the establishment of the liquid-solid two-phase turbulent biological reaction kinetics model ; matlab7 .0 edit simulation program for the development platform , the development of a simulation system , solid two-phase three-dimensional flow field and water concentration field simulation of liquid inside the reactor . The application simulation system developed on an industrial scale Carrousel oxidation ditch sewage treatment plant are simulated, using the sensitivity analysis method with Latin Hypercube Sampling - based maximum likelihood wears combination of model parameter checking . The results show that the model checking method can effectively reduce the error of the simulation and measured values ??.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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