作　　者： ; ; ; ;

机构地区： 北京工业大学

出　　处： 《化工学报》 2010年第11期2931-2937,共7页

摘　　要： 为探究短程硝化污泥快速颗粒化的最佳条件,采用SBR反应器,在温度28℃,曝气量0.2m3.h-1,溶解氧(DO)>2.0mg·mL-1,污泥龄(SRT)为15d的运行工况下,缩短沉降时间为2min,通过以pH作为氨氧化过程的控制参数,优化曝气时间,防止过曝气,经过80周期(19d)成功实现短程硝化絮状污泥的颗粒化,并维持稳定。形成的颗粒污泥粒径在1.5～2.0mm之间,对COD和氨氮的去除率分别达到80%和95%,亚硝酸盐积累率(NO2--N/NOx--N)平均达到95%。分子生物学FISH技术对颗粒污泥菌群结构的定量分析表明,AOB依旧是优势菌群,约占17.8%左右,NOB占0.6%。曝气初期FA的抑制和实时控制是启动和维持颗粒污泥短程硝化性能的主要原因。 In order to explore the optimal conditions of nitrifying sludge granulation,test was carried out in a sequencing batch reactor（SBR）at operation conditions：temperature 28℃,aeration 0.2 m3·h-1,dissolved oxygen（DO）2.0 mg·L-1,sludge age（SRT）15 d,leading to settling time shorten to 2 min.The granulation of nitrifying floccular activated sludge was achieved successfully after 80 stable cycles（19 d）by parameter control of ammonia oxidation process,by optimization of aerobic time and against over-aeration,and average diameter of sludge granular obtained was between 1.5—2.0 mm.The efficiency of COD and ammonia removal was 80% and 95%,respectively.The nitrite accumulation rate（NO-2-N/NO-x-N）was over 95%.The quantitative results from fluorescence in situ hybridization（FISH）analysis for molecular biology show that the dominant micro-organism was still AOB,about 17.8% of total bacteria,while NOB only 0.6%.The main factors for stable performance of nitrification were FA inhibition and real-time control.

关 键 词： 短程硝化 快速培养 颗粒污泥 实时控制

领　　域： [环境科学与工程]