纤维直接过滤去除原水藻类

Study on the algae removal from raw water by direct fiber filtration

以丙纶丝为滤料 ,以自制转鼓装置对高藻原水进行直接过滤除藻试验。结果表明 ,对Chl a及藻总数的去除率分别为 64 %— 95 % (平均 91% )和 82 %— 96% (平均 92 % ) ,对主要藻种的平均去除率均在 85 %以上 ,除藻效果明显。原水中藻类特征、试验运行工况条件直接影响对藻类的去除效果。筛分截留与吸附

This paper presented the effects of a pilot scale experiment on algae removal by direct filtration apparatus consisted of a drum on which polypropylene fiber silk was fixed. Under certain operating conditions, the removal rates of total algae number, Chl-a, Diatom, Green algae, Blue-green algae, Flagellate algae ranged between 64%-95% (averagely 91%) and 82%-96%, (averagely 92%) respectively. Main algae species were more than 85% removal from raw water. The effects of algae removal by the apparatus were affected by both of the algae characteristics in raw water and operating conditions including the hydraulic loading, way and intensity of backwash, and the drum rotating speed. Micro-sieving and adsorption-flocculation of the filter bed to algae were the main removal mechanisms.