摘要
在高浓度活性污泥条件下,通过测定搅拌功率和氧传质系数,对二次流场中的氧传质效率进行了研究。通过与普通流场的对比表明,二次流场在相对较小的搅拌功率和通气量下,具有较高的氧传质效率。并发现在污泥浓度为20 g/L时,控制剪切条件能够改善活性污泥的絮体结构,使之具有较高的氧传质速率和沉降性能,保证了高浓度条件下微生物的降解效率。
The oxygen mass transfer efficiency in a secondary flow hydro-scene was investigated by measuring the stirring power and oxygen mass transfer rate for a high activated sludge processing. Comparing with general hydro-scene, a higher oxygen mass transfer rate can be observed even with a comparatively small stirring power and gas velocity in secondary flow hydro-scene. When the sludge concentration reaches 20 g/L, the configuration of floecule can be ameliorated by controlling the shearing condition, it therefore possesses a higher oxygen mass transfer rate and an improved settlement characteristic for the high organism degradation rate for sludge with high concentration.
出处
《矿冶工程》
CAS
CSCD
北大核心
2007年第3期37-40,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金(50574111)
湖南省自科基金(06JJ4066)资助项目
关键词
高浓度污泥
二次流
剪切功率
传质效率
high concentration sludge
secondary flow
shearing power
mass transfer rate
