次毫米过滤组件分离高浓度污泥试验

摘要

采用自主研制的一种次毫米过滤组件,实现高浓度污泥的折衷分离,考察了ρ(污泥)(10～30 g/L)、组件孔径(0.10～1.00 mm)及压差(水头差:30 cm H2O,90 cm H2O)对次毫米过滤通量和平均通量的影响;利用多元线性回归模型和因素主次分析方法,探讨了三因素对平均通量的影响程度.结果表明:在不同的ρ(污泥)、组件孔径及压差条件下,过滤通量随时间均呈负指数形式衰减;三因素对平均通量的影响程度为ρ(污泥)>组件孔径>压差,ρ(污泥)与平均通量呈负相关,组件孔径、压差与平均通量呈正相关.同时,通过解析多元线性回归模型得到次毫米平均通量的表达式,为试验设计的优化提供了理论依据.%An innovative sub-millimeter filtration (SMF) component was introduced to realize compromise separation of high concentration sludge. Effects of sludge MLSS (1O-30 g/L) ,component pore size (0.10-1.O0 mm) and pressure drop (water head 30 cm H2O and 90 cm H2O) on the filter flux and average flux of the SMF were investigated. A linear multi-regression model and primary and secondary factor analysis methods were applied to study the degree of influence of these three operating conditions on the average flux. Results showed that filter flux vs. time exhibited negative exponent patterns under different operating conditions.The three conditions that affected the average flux were analyzed, and the order of influence of the different factors was sludge MLSS,component pore size, and then pressure drop. Average flux was negatively correlated with sludge MLSS, and positively correlated with component pore size and pressure drop. Meanwhile, the mathematical formula for average flux of the SMF was obtained by resolving the linear multi-regression model, which provided a theoretical basis for the experiment optimization design.