摘要
在中试的基础上进行了污泥回流比(R)对复合式生物膜-活性污泥工艺处理城市污水的效能和微生物特性的影响研究.结果表明R对COD的去除效果影响不大,系统去除率始终在80%以上,R的增加有利于氨氮的去除,当R超过200%时,氨氮的呈下降趋势,总氮的去除与氨氮一致.对微生物特性分析表明,R的增加能够提高系统内的污泥浓度,但会降低微生物的活性.复合式生物膜-活性污泥工艺合理的R为150%～200%.
The effect of return sludge ratio(R) on the performance of hybrid biofilm-activated sludge process on treating domestic wastewater as well as property of microorganisms was investigated respectively in this paper on the base of pilot-scale test.The results demonstrated that R performed a slight influence on COD removal,the efficiency is always above 80%;on the contrary,increased R is in favor of ammonia-nitrogen removal,the efficiency represents downtrend.Moreover,the removal of total nitrogen is consistent with the removal of ammonia-nitrogen.Analysis on microorganism property suggested that MLSS in such a system was enhanced when biggish R was used,whereas the activity of microorganism was decreased.Therefore,R at the range of 150%-200% is recommended within hybrid biofilm-activated sludge process system.
出处
《现代化工》
CAS
CSCD
北大核心
2006年第z2期215-218,共4页
Modern Chemical Industry
基金
国家自然科学基金资助项目(50378025)
关键词
污泥回流比
复合式生物膜-活性污泥工艺
处理效能
微生物活性
return sludge ratio
hybrid biofilm-activated sludge process
treatment performance
microorganism property
