环境工程学报2017，Vol.11Issue(4)：2452-2456,5.DOI:10.12030/j.cjee.201510194
双频超声波促进剩余污泥的破解
Double frequency ultrasonic pretreatment on dewaterability of waste activated sludge
摘要
Abstract
Pretreatment method of ultrasonic disintegration is a new technology used to accelerate anaerobic digestion of waste activated sludge (WAS).Frequency is one of the most important parameters influencing the disintegration degree of WAS.The effects of ultrasonic pretreatment on the reduction of WAS were evaluated based on the disintegration degree of Soluble COD,sludge particle diameter,and specific resistance of filtration (SRF).Frequency (20 kHz,25 kHz,and 20/25 kHz) and specific energy (0 to 12 000 kJ · (kg TS)-1) of ultrasonic pretreatment were the main controlled parameters.The results showed that the DD of pretreated sludge increased by 20.4％,17.3％,and 26.8％ more than that of untreated WAS under frequencies of 20 kHz,25 kHz,and 20/25 kHz.The mean diameter decreased 29.68％,26.33％,and 33.39％,respectively,at the specific energy of 12 000 kJ · (kg TS)-1 The dewaterability of WAS slightly improved at a double frequency (20/25 kHz) and low specific energy (400 kJ · (kg TS)-1),which were also the optimal parameters.When the pretreatment is carried out at the optimal condition,the SRF of the pretreated sludge effectively decreased by 46.6％ more than that of raw sludge.The study proved the feasibility of double frequency ultrasonic pretreatment to improve the disintegration performance of WAS.关键词
剩余污泥/超声波预处理/双频/粒径/污泥破解度/污泥比阻Key words
waste activated sludge/ultrasonic pretreatment/double frequency/particle diameter/disintegration degree of SCOD/SRF分类
资源环境引用本文复制引用
徐慧敏,何国富,熊南安,戴晓虎,象伟宁..双频超声波促进剩余污泥的破解[J].环境工程学报,2017,11(4):2452-2456,5.基金项目
国家高技术研究发展计划(863计划)(2012AA063502) （863计划）
