贫营养生物膜系统脱氮效果及影响因素实验研究  

Experimental study on effectiveness and influencing factors of biological denitrification via oligotrophic biofilm system

作　　者：魏巍[1] 黄廷林[1] 苏俊锋[1] 王春燕[1] 黄卓[1] 

机构地区：[1]西安建筑科技大学,西北水资源与环境生态教育部重点实验室,西安710055

出　　处：《环境工程学报》2010年第10期2179-2184,共6页Chinese Journal of Environmental Engineering

基　　金：国家重大科技专项(2009ZX07424-006-003);国家自然科学基金资助项目(50830303;50778147);西安市科技计划项目(SF08022);陕西省自然科学基金项目(2010JQ7004)

摘　　要：为了有效解决饮用水源氮源污染问题,采用贫营养生物菌剂对新型悬浮填料进行人工强化挂膜,在无需外加碳源及模拟原位条件下考察贫营养生物膜系统对微污染原水的脱氮效果及其影响因素。研究表明:在水温为25℃左右,溶解氧浓度为4 mg/L左右,水源水质为NH4+-N0.140 mg/L,NO2--N0.005 mg/L,NO3--N1.096 mg/L,TN1.450 mg/L,CODMn4.810 mg/L的条件下,该系统运行22 d后对原水硝氮及总氮具有较明显的去除效果,去除率范围分别为43%～75%和49%～76%,运行期间氨氮浓度基本保持在0.1 mg/L以下,系统稳定运行时的脱氮效果可满足地表水环境Ⅲ类水体的质量标准要求。另外,通过考察水温、填料填充率、C/N比等因素对贫营养生物膜系统脱氮效果的影响作用,说明在不同时期和不同环境条件下该系统对微污染水体的脱氮效果具有一定差异。In order to effectively solve the nitrogen pollution problem of drinking water sources,a novel suspended biological carrier enhanced to form biofilm by a kind of high efficient biological agent for the denitrification,was applied to oligotrophic biofilm system.The effects and influencing factors of biodenitrification for micro-polluted source water via oligotrophic biofilm system were studied under conditions of no additional carbon sources and in situ simulation.First,the results showed that the removal efficiency of NO-3-N and TN could be in the range of 43% to 75% and 49% to 76% respectively after 22 days of operation under conditions of temperature 25℃,dissolved oxygen 4 mg/L,NH＋4-N 0.140 mg/L,NO-2-N 0.005 mg/L,NO-3-N 1.096 mg/L,TN 1.450 mg/L and CODMn 4.810 mg/L for source water,and the NH＋4-N concentration could almost be less than 0.1 mg/L during the whole operation period.Second,the nitrogen removal effects could meet the requirements of class Ⅲ of surface water quality according to GB3838-2002 in steady running period.Lastly,the effects of temperature,filling ratio of suspended packing and C/N ratio on the denitrification efficiency of oligotrophic bio-contact oxidation system were also investigated in this research,which indicated that the nitrogen removal efficiency was of difference in different periods and environmental conditions.

关 键 词：生物膜系统 悬浮填料 微污染原水 生物菌剂 脱氮 

分 类 号：X703[环境科学与工程—环境工程]