摘要
为了研究超声对污泥脱水性能的影响,在污泥板框压滤实验中,利用超声结合絮凝剂聚丙烯酰胺(PAM)处理污泥的方法,对比了有无超声对污泥压滤脱水的效果。研究结果表明:超声可以降低污泥含水率,使其从最初含水率近98%减少到81%,污泥的体积减少为最初的1/10。超声声强为410 W/m2、超声处理时间2.5 m in为较优处理条件;同时絮凝剂的使用量,从0.7%(干基)降至0.6%(干基)。
In order to study the influences of the ultrasound on the dewaterability of the sludge, the combination ofultrasound technique and flocculant （PAM） was used for the sludge dewatering by plate-frame pressure filtration.Comparison between the dewatering effects of the sludge treated with and without ultrasound showed that ultrasoundtreatment was helpful to decrease the content of the water, from 98% to 81%. The better ultrasound conditions forthe treatment are： ultrasound intensity 410 W/m^2, and treatment time of ultrasound 2.5 min. Under these conditions, the water content of sludge decreased to 81%. Meanwhile, the usage of the flocculant was reduced from 0. 7% （dry basis） to 0. 6% （dry basis）.
出处
《南京工业大学学报（自然科学版）》
CAS
2006年第1期58-61,共4页
Journal of Nanjing Tech University(Natural Science Edition)
基金
江苏省科技厅社会发展项目(BS2004029)
关键词
超声
污泥
脱水
板框压滤
ultrasound
sludge
dewatering
plate-frame pressure filtration
