【摘要】 通过对污泥离心过滤脱水后含水率及毛细吸水时间(CST)的测定,考察了生物表面活性剂鼠李糖脂及其与阳离子化学表面活性剂溴化十六烷基三甲铵(CTAB)复配对活性污泥脱水性能的影响.当鼠李糖脂投加量为0.10g·g-1时,相比于原污泥,离心脱水污泥含水率下降了2.4%,过滤滤饼含水率下降了10.8%;CST值却由27.3s升至48.8s.研究结果说明:鼠李糖脂的投加能显著降低污泥脱水后污泥的含水率,但却会使污泥脱水速率变慢.相比于单独使用鼠李糖脂或CTAB,鼠李糖脂与CTAB以1∶1,1∶2或1∶3复配时不仅使脱水后污泥含水率更低,而且对污泥脱水速率也有改善作用.更多还原

【Abstract】 The effect of biosurfactantrhamnolipid alone and its combination with cation chemical surfactant cetyltrimethyl ammonium bromide(CTAB)on sludge dewaterability was investigated by determining the water content of dewatered cakes and capillary suction time(CST).When the rhamnolipid dose was 0.01g·g-1,the water content of sludge after centrifugation was lower by about 2.4% compared with raw sludge,while the water content of filtered sludge cake was lower by about 10.8%;but the value of CST increased from 27.3s to 48.8s.The results showed that the addition of the biosurfactantrhamnolipid could significantly promote the dewatering of sludge,but would slow down the dewatering rate of activated sludge.Compared with rhamnolipid or CTAB alone,the combination of rhamnolipid and CTAB(the combination proportion was 1∶1,1∶2or 1∶3)could not only decrease the water content of dewatered sludge cakes,but also improve the dewatering rate of activated sludge.更多还原