摘要
采用序批式反应器(SBR)反应器,按照强化生物除磷工艺(EBPR)的运行方式,考察了低有机负荷率下培养聚磷好氧颗粒污泥的可行性,并对形成颗粒的特性以及关键培养技术进行了评价.SBR反应器在启动后6个星期内基本达到稳定,形成的聚磷好氧颗粒污泥主要由表面紧密缠绕的丝状菌和内部紧凑排列的短杆状细菌组成,颗粒内富集了大量的聚磷菌,污泥含磷量高达7.05%,能够达到非常好的除磷效果,总磷去除率高于90%,同时具有紧凑密实的结构和良好的沉降性能,平均粒径为940.17,μm,平均密度为1.048,g/cm3,SVI为22.02,mL/g.实验结果表明,低有机负荷率有利于富集聚磷菌和增强颗粒稳定性,是培养聚磷好氧颗粒污泥的关键控制参数.
With a sequencing batch reactor（SBR） and the enhanced biological phosphorus removal（EBPR） technique,feasibility of the cultivation of phosphate-accumulating aerobic granular sludge at low organic loading rate has been studied and the granular characteristics and key cultivation technology have been evaluated.SBR became stable within 6 weeks after start-up and the phosphate-accumulating aerobic granular sludge formed was composed of filamentous bacteria tightly wrapped on the surface and rod-shaped bacteria closely arrayed inside.The granular sludge was rich in PAOs and had the phosphorus content up to 7.05%,so that it had excellent phosphorus removal performance with TP removal efficiency higher than 90%.In addition,the phosphate-accumulating aerobic granular sludge was compact in structure and had good settling performance,with the mean particle size as 940.17,μm,the mean density as 1.048 g/cm3 and SVI as 22.02,mL/g.The experimental results show that low organic loading rate is the key control parameter in the cultivation of phosphate-accumulating aerobic granular sludge,which can facilitate the accumulation of PAOs and enhance the granule stability.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2010年第5期440-446,共7页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金资助项目(20776096)
关键词
聚磷好氧颗粒污泥
低有机负荷率
序批式反应器
phosphate-accumulating aerobic granular sludge
low organic loading rate
sequencing batch reactor
