A_2N系统中低碳污水的反硝化除磷优化及运行稳定性  

Optimization and Stability of Denitrifying Phosphorus Removal in a Two-Sludge System for Treating Wastewater with Low Carbon Source

作　　者：张耀斌[1] 邢亚彬[1] 秦四飞[1] 全燮[1] 陈硕[1] 

机构地区：[1]大连理工大学环境科学与工程系,工业生态与环境工程教育部重点实验室,大连116024

出　　处：《环境科学》2011年第4期1020-1026,共7页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07208-004);国家高技术研究发展计划(863)重点项目(2009AA06380)

摘　　要：采用序批式生物移动床(SBMBBR),通过优化反应条件可以取得较高的聚-β-羟基丁酸盐(PHB)富集效率,通过双泥系统的操作,可以实现低碳下的高效反硝化除磷.在进水COD 200 mg/L、pH为中性的生活污水中,并在搅拌速度为80 r/min下,磷的去除率达到83.7%,NO 3--N的去除率达到81.4%,NO 2--N的去除率接近100%,取得较好的反硝化除磷作用.较大的生物量是保证较高效率的反硝化除磷的关键之一.采用双泥系统运行SBMBBR,可以获得稳定的、较高效率的脱氮除磷.在COD为140～170 mg/L,TN为34～42 mg/L低碳氮比的实际废水处理中,磷的去除率达到89.2%,TN的去除率达到84.5%.在处理过程中,排泥中的磷量基本与进水中磷的量一致,未发现磷的其它去除路径.Poly-β-hydroxybutyrate（PHB） could be efficiently accumulated under optimized conditions in a sequencing batch moving bed biological reactor（SBMBBR）,and a high performance of denitrifying phosphorus removal in the reactor could be achieved by coupling with a two-sludge system.Denitrifying phosphorus removal achieved the highest efficiency under influent COD of 200mg /L,neutral pH and stirring speed of 80 r /min.The removal rates of phosphorus,NO 3--N and NO 2--N reached 83.7%,81.4% and above 100%,respectively.High biomass in the SBMBBR is one of keys to improve the performance in removal of nitrogen and phosphorus.When the SBMBBR was conducted under a two-sludge system,stable and high performance was obtained.Removal rates of phosphorus and TN reached 89.2% and 84.5% under the influent COD of 140-170 mg /L and TN of 34-42 mg /L,respectively.In the process,phosphorus content in excess sludge approached to that in the feeding,and other path of phosphorus removal was not found.

关 键 词：双泥系统 反硝化除磷 低碳污水 聚-β-羟基丁酸盐 序批式移动床生物膜反应器 

分 类 号：X703.1[环境科学与工程—环境工程]