摘要
以超声波预处理城市污水处理厂剩余污泥,考察不同功能密度下的超声波对污泥水解释放碳源过程的影响。结果表明,污泥经超声波预处理,可缩短污泥水解时间,促进VFA释放,且声能密度越大,促进作用越显著;当声能密度为0.138 W/mL、作用时间为1 min时,污泥水解4~5 d后,释放VFA达到800 mg/L,VFA/TN由初始的1.98提升至4.15,VFA/TP由初始的24.78提升至42.35。同时,超声波不仅破坏污泥絮体结构,而且提高了微生物中蛋白酶和辅酶F420的活性,更有利于污泥水解。
Ultrasonic pretreatment was induced to treat the excess sludge.The effect of ultrasonic pretreatment on the extraction of sludge carbon source in hydrolysis process was investigated.The results indicate that the ultrasonic pretreatment can significantly improve the release of VFA in hydrolysis process,while the hydrolysis time is reduced.After 4 to 5 days of sludge hydrolysis with the ultrasonic sound power density of ultrasonic of 0.138 W / mL,the VFA concentration reaches 800 mg / L,the VFA / TN increases from 1.98 to 4.15,and the VFA / TP increases from 24.78 to 42.35.At the same time,the ultrasonic disintegrates the sludge floc,and increases the activity of protease and coenzyme F 420 in microbe,so that the ultrasonic is beneficial for the sludge hydrolysis.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第9期3573-3577,共5页
Chinese Journal of Environmental Engineering
基金
国家"863"高技术研究发展计划项目(2009AA063802)
国家"水体污染控制与治理"科技重大专项(2012ZX07203-001)
关键词
超声波
污泥
水解
碳源
ultrasonic
sludge
hydrolysis
carbon source
