厌氧颗粒污泥人工床层快速培养与吸附动力学分析

发布时间：2018-03-02 00:18

本文关键词： 厌氧颗粒污泥人工污泥床层动力学分形维数　出处：《农业机械学报》2016年09期 　论文类型：期刊论文

【摘要】：为加快颗粒污泥的形成速率,解决颗粒污泥培养时间长、污泥活性差的问题,通过向厌氧池中加入人工污泥床层快速培养厌氧颗粒污泥,实现厌氧颗粒污泥培养的可控性。采用电子扫描电镜对培养好的厌氧颗粒污泥微观形态进行观察,通过电子显微镜观察颗粒污泥形态变化,确定颗粒污泥分形维数。以颗粒污泥的数量分布、平均粒径、含水率为表征参数,建立厌氧颗粒污泥的吸附动力学模型。结果表明,厌氧颗粒污泥附着在人工污泥床层上,由于人工污泥床层均匀分布使得形成粒径为4~5 mm的厌氧颗粒污泥质量占总污泥质量的80%,分形维数在2.68~2.83之间,颗粒轮廓清晰,颗粒污泥在水力负荷达到5 kg/(L·d)时,人工污泥床层上形成的颗粒污泥质量浓度仍保持在5.84 kg/m3,颗粒污泥耐冲击能力强;针对吸附在人工污泥床层上的厌氧颗粒污泥建立吸附动力学模型,发现反应池中污泥的内循环可以促进厌氧颗粒污泥的形成,当厌氧反应池任意断面颗粒污泥向上和向下的污泥浓度之比为0.8~0.9时,形成的厌氧颗粒污泥吸附性能最强。
[Abstract]:In order to speed up the formation rate of granular sludge and solve the problems of long time of granular sludge cultivation and poor sludge activity, the anaerobic granular sludge was rapidly cultivated by adding artificial sludge bed to the anaerobic tank. To realize the controllability of anaerobic granular sludge culture, the microscopic morphology of cultured anaerobic granular sludge was observed by electron scanning electron microscope, and the change of granular sludge morphology was observed by electron microscope. The fractal dimension of granular sludge was determined. The adsorption kinetics model of anaerobic granular sludge was established by taking the quantity distribution, average particle size and moisture content of granular sludge as characterization parameters. The results showed that anaerobic granular sludge was attached to artificial sludge bed. Because of the uniform distribution of artificial sludge bed, the anaerobic granular sludge with diameter of 4 ~ 5 mm accounts for 80% of the total sludge mass, the fractal dimension is between 2.68 and 2.83, the granular profile is clear, and the granular sludge reaches 5 kg/(L 路d at hydraulic load. The mass concentration of granular sludge formed on the artificial sludge bed remained at 5.84 kg / m ~ (3), and the granular sludge had strong impact resistance, and the adsorption kinetics model was established for the anaerobic granular sludge adsorbed on the artificial sludge bed. It was found that the internal circulation of sludge in the reactor could promote the formation of anaerobic granular sludge, and the adsorption performance of anaerobic granular sludge formed was the strongest when the ratio of the up and down sludge concentration in any section of the reactor was 0.8 ~ 0.9.
【作者单位】：东北电力大学化学工程学院;
【基金】：吉林省环保厅科研项目(吉环科字2009-13号) 吉林市科技计划项目(201232404)
【分类号】：X703.1

【相似文献】