摘要
通过分析颗粒污泥沉降过程的特点,采用颗粒物质干涉沉降规律对颗粒污泥沉降过程进行描述,结合Allen阻力公式,建立了颗粒污泥沉降动力学模型,并用实验和文献数据对模型的可靠性进行了验证,模型预测值误差不超过±8%。应用模型对好氧颗粒污泥沉降速度的模拟实验表明,一般好氧颗粒污泥沉降速度在5～120m/h,沉降速度随好氧颗粒污泥粒径和密度的增大而增加,沉降过程雷诺数(Re)在1～100,处于Allen阻力区。
Following an analysis of the settling characteristics of granular sludge, the hindered settling model for granules was employed to simulate the settling granules; it was then combined with the Allen＇s equation of settling resistance to form the kinetic model for the settling of granular sludge. The model was verified for wide ranges of applicability since the calculated values of settling velocities and the Reynolds Numbers are within 8% of those measured in this study and/or reported in the literature. The results of model simulations for settling of aerobic granular sludge have suggested that the settling velocity of most granular sludge is 5-120 m/h, increasing with the size of the granules and/or the sludge density and that the Reynolds Number of the settling is 1-100, within the applicable regime of the Allen＇ s equation.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第3期36-38,共3页
Environmental Pollution & Control
基金
江西理工大学自选课题资助项目
关键词
颗粒污泥
沉降速度
污泥密度
动力学模型
granular sludge
settling velocity
sludge density
kinetic model
