活性污泥丝状菌膨胀的起因分析及控制措施

Analysis of the Cause of Filament Bulk-ing in Activated Sludge and Controlling Mothodology

介绍近年来人们从污泥中新分离鉴定的一些丝状菌,如Herpetosiphon、杆菌属的Mycoides、Eikelboom属中021N、1701、0041和0803型等.曝气池中的泡沫是由放射菌纲的奴卡氏菌属产生的.活性污泥的絮凝体是一种含有蛋白质、核酸、碳水化合物和灰分的物质,增加絮凝体数量和大小有利于污泥沉降,而丝状菌菌丝总长度增加则使污泥沉降性能下降.由于保持较高溶解氧浓度(≥2mg/L)和污泥有机负荷(F/M),在曝气池前设置接触混合池、投加氯、间歇式进水等能抑制丝状菌生长,故这些都是消除丝状菌膨胀的有效措施。

The paper intraduces some filamentous species which were isolated from sludge and identified recently, such as Herpetosiphon, Bacillus mycoides. Eikelboom types 021N, 1701, 0041 and 0803. Scurn formation in activated sludge plants was associated with Nocardia of actinomycete family. Floc contained protein, carbohydrate, nuceic acids and ash. The setting ability of sludge improved with the increas of floc size and quantity and worsened by the increase of the totale leagnth of microganism filament. The filament bulking can be eliminated by intermittent feeding, chlorine dosing, higher DO concentration and organic loading and adding initial compartment.