污水稳定塘沉积分布的水动力学模型研究  

Study on hydro dynamic model of deposition in sewage stabilizing ponds

作　　者：杨美卿[1] 王桂玲[1] 镇芙蓉 

机构地区：[1]清华大学水电工程系

出　　处：《泥沙研究》1997年第4期30-36,共7页Journal of Sediment Research

摘　　要：稳定塘处理污水是近年来在我国着力推广的一项新技术。沉积污泥的数量和分布，直接影响到塘内的生化过程和净水能力。本文采用平面二维不恒定紊流模型，用有限体积法离散基本微分方程。ＳＩＭＰＬＥ方法进行压力校正，求解流速场和悬浮物浓度场。采集城市污水污泥样品，测试基本物理力学参数，研究污泥固结密实过程，有机物降解消化过程，提出模拟计算方法。用齐齐哈尔稳定塘运行１４年的实测资料对比分析，表明建议的水动力学模型计算结果与实测资料符合良好，能描述污水稳定塘的工作状况，为其研究设计和运用提供了分析检验的手段。Purifying sewage by stabilizing ponds is a developing technology. The amount and distribution of deposited sludge in the ponds affect their biochemical process and purging ability. A 2D model of unsteady turbulent flow is established to compute the velocities, suspended densities and bed deformation, in which, the control volume method, SIMPLE schedule and ADI method are included without rigid top hypothesis. At the same time, several tests and analyses are conducted to investigate the basic physic mechanical characteristics of suspended solid pollutants and sludge, the settling velocities and deposit densification process, and the biochemical degradation process. The relevant simulating and calculating methods are proposed. The depositing process in Qiqihaer stabilizing ponds from 1980 to 1994 is simulated to verify this model. It shows the present model and the handling for correlative parameters are valid and effective which may describe the work situations in stabilizing ponds. The model also may be considered as references in the design and management of sewage stabilizing ponds, as well as in further researches. \ \

关 键 词：污水 稳定塘 水动力学模型 池塘处理 沉积分布 

分 类 号：X703[环境科学与工程—环境工程]