This paper proposes a mathematical model for granular bed filtration incorporating particle size distribution. The model is based on the improvement of removal efficiency of finer particles in the presence of coarser particles, which is explained by the assumption that all of the retained coarser particles, as well as retained finer particles, act as particle collectors in the removal of finer particles. The concept of detachment of retained particles due to hydraulic gradient is also incorporated to describe the decrease in removal efficiency during the filter breakthrough period of the filter run. 本研究提出一個可描述懸浮顆粒粒徑分佈影響深床過濾去除效率的數學模式。其依據為:當懸浮液中有粗顆粒存在時可增加細顆粒的去除效率。而此依據可由＂顆粒收集者” ( Particle Collector)的觀念來解釋。本模式亦考慮過濾時瀘床中水力梯度的增加造成沉降顆粒的脫離現象，以描述整個濾程中去除效率漸漸降低的貫穿階段。
關聯:
嘉南學報 16: 頁A79-A84 轉載 J Water SRT - Aqua 39(2) : p.96-100 (1990)
