超声波协同改性煤气化灰渣调理污泥脱水性能研究

摘要

Specific resistance to filtration (SRF)and capillary suction time(CST)were taken as the inde-xes of sludge dewatering capacity.The effects of the combining action of ultrasonic and modified coal gas-ification slag on sludge dewatering capacity were discussed.The results showed that for sludge condition-ing by single ultrasonic,the best condition was when ultrasonic power was 60 W and treatment time was 20 s.For sludge conditioning by single modified coal gasification slag,the best condition for sludge dewa-tering performance was when the ratio of modified coal gasification slag was 20%.For sludge conditioning by the combination of ultrasonic and modified coal gasification slag,the orthogonal test revealed ultrasonic power of 60 W,treatment time of 30 s and dosage of modified coal gasification slag of 30% were the best level combination.%以污泥比阻（SRF）和毛细吸水时间（CST）作为污泥脱水性能指标，探讨超声波与改性煤气化灰渣协同作用对污泥脱水性能影响。结果表明，单独超声波调理污泥，超声波功率60 W，超声波作用时间20 s 为最佳调理参数；单独改性煤气化灰渣调理污泥，最佳投加量为20％；采用超声波协同改性煤气化灰渣调理污泥的最优参数为：超声波功率60 W，作用时间30 s，改性煤气化灰渣投加量30％。