摘要
利用槽式超声波发生器对城市污水处理厂剩余污泥进行处理,研究超声波对污泥的破解效果以及破解后污泥消化产气能力的改善情况,分别比较超声波发生方式、处理时间、功率和声能密度等因素对污泥破解及厌氧消化等特性的影响.结果表明,经过超声波处理后的污泥在厌氧反应初期,其产气速率增长较为明显.同时,单频超声波处理后污泥的厌氧产气累积增量高于双频超声波,为40.93%,而双频超声波处理后污泥的SCOD溶出量大,比单频高23.5%.
Ultrasonic generating trough was applied to study the impact of ultrasonic on conditioning of sewage sludge. There are few ultrasonic generators for sludge treatment specifically, so we designed a double-frequency ultrasonic generating trough which could adjust frequency, energy density and treating time flexibly. In the research characteristics of sewage sludge treated by single-frequency and double-frequency ultrasonic were compared. According to the results, the digestion biogas of the sewage sludge treated by ultrasonic increase obviously, and the digestion biogas increment of the sewage sludge treated by single-frequency is 40.93 %, higher than that treated by double-frequency. But the SCOD of the sewage sludge treated by double-frequency is 23.5 %, more than that treated by single-frequency.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第10期2815-2819,共5页
Environmental Science
关键词
超声波
污泥
双频
破解
厌氧消化
ultrasonic
sludge
double-frequency
disintegration
digestion
