Three-dimensional three-phase model for simulation of hydrodynamics,   oxygen mass transfer, carbon oxidation, nitrification and   denitrification in an oxidation ditch

doi:10.1016/j.watres.2014.01.021

CORC > 北京大学 > 环境科学与工程学院

	Three-dimensional three-phase model for simulation of hydrodynamics, oxygen mass transfer, carbon oxidation, nitrification and denitrification in an oxidation ditch
	Lei, Li ; Ni, Jinren
刊名	水研究
	2014
关键词	Three-dimensional three-phase model Pseudo-solid phase Sedimentation Mass transfer Biochemical kinetics Oxidation ditch ACTIVATED-SLUDGE MODEL NUTRIENT REMOVAL AERATION SYSTEMS AEROBIC STORAGE IMAGE-ANALYSIS ALPHA-FACTOR WASTE-WATER PREDICTION FLOCS CFD
DOI	10.1016/j.watres.2014.01.021
英文摘要	A three-dimensional three-phase fluid model, supplemented by laboratory data, was developed to simulate the hydrodynamics, oxygen mass transfer, carbon oxidation, nitrification and denitrification processes in an oxidation ditch. The model provided detailed phase information on the liquid flow field, gas hold-up distribution and sludge sedimentation. The three-phase model described water-gas, water-sludge and gas sludge interactions. Activated sludge was taken to be in a pseudo-solid phase, comprising an initially separated solid phase that was transported and later underwent biological reactions with the surrounding liquidmedia. Floc parameters were modified to improve the sludge viscosity, sludge density, oxygen mass transfer rate, and carbon substrate uptake due to adsorption onto the activated sludge. The validation test results were in very satisfactory agreement with laboratory data on the behavior of activated sludge in an oxidation ditch. By coupling species transport and biological process models, reasonable predictions are made of: (1) the biochemical kinetics of dissolved oxygen, chemical oxygen demand (COD) and nitrogen variation, and (2) the physical kinematics of sludge sedimentation. (C) 2014 Elsevier Ltd. All rights reserved.; Engineering, Environmental; Environmental Sciences; Water Resources; SCI(E); EI; PubMed; 2; ARTICLE; nijinren@iee.pku.edu.cn; 200-214; 53
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158800]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Lei, Li,Ni, Jinren. Three-dimensional three-phase model for simulation of hydrodynamics, oxygen mass transfer, carbon oxidation, nitrification and denitrification in an oxidation ditch[J]. 水研究,2014.
APA	Lei, Li,&Ni, Jinren.(2014).Three-dimensional three-phase model for simulation of hydrodynamics, oxygen mass transfer, carbon oxidation, nitrification and denitrification in an oxidation ditch.水研究.
MLA	Lei, Li,et al."Three-dimensional three-phase model for simulation of hydrodynamics, oxygen mass transfer, carbon oxidation, nitrification and denitrification in an oxidation ditch".水研究 (2014).