摘要
对污泥超声预处理技术的基础研究是实现该技术工程应用的前提,为此取深圳市某污水处理厂二沉池污泥和浓缩污泥进行超声破解试验。结果表明,污泥破解程度随着超声输入能量的增加而提高,而且低强度、长时间超声作用的效果好于高强度、短时间作用;温度升高有助于污泥破解,但随着温度升高幅度的增加其贡献下降;污泥含水率越高则COD的溶出率越高,但低含水率污泥的能量利用效率更高;搅动有利于污泥破解;污泥破解COD溶出率(DDCOD)与超声声能密度(E)和辐射时间(t)的关系可以用DDCOD=kEmtn表示,这为该技术的应用提供了理论支持。
Experiments were performed to study the ultrasonic pretreatment of sewage sludges from a wastewater treatment plant in Shenzhen. The results show that the disintegration degree of sludge increases when the ultrasonic energy input increases. At given energy input, the low-intensity and longtime sonication is more efficient than the high-intensity and short-time one. Temperature rising benefits sludge disintegration and but the temperature contribution slows down as the temperature increases further. High moisture content is advantageous to sludge disintegration while low moisture content can increase the energy efficiency. Agitation helps sludge disintegration. A model was proposed for the ultrasonic sludge disintegration rate （DDCOD ） based on the ultrasonic energy intensity （E） and the sonication time （t） ： DDCOD = kE^mt^n, which provides the basis for application of the new technology.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第3期96-100,共5页
China Water & Wastewater
关键词
超声
破解
剩余污泥
影响因素
ultrasonic
disintegration
excess sludge
impact factors
作者简介
电话：（0755）26036691×805.26036624.E—mail：sunpaee@vip．163．com。huanl@mails．tsinghua．edu．cn。
