摘要
在水库水源水质为NH4+-N、NO2--N、NO3--N、TN质量浓度分别为0.246、0.009、1.730、1.989mg·L-1,UV254为0.099cm-1和CODMn5.5mg·L-1的条件下,采用新型悬浮填料、贫营养原位生物接触氧化法对微污染原水进行脱氮处理。结果表明,在DO质量浓度为3.0～4.0mg·L-1,水温为25℃左右时,系统对水中的NH4+-N、NO3--N、TN及CODMn均有较好的处理效果,最大去除率分别可达到73%、80%、77%和28%。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。同时还探讨了在生物脱氮过程中贫营养微生物及生物膜系统的净水机理。
Denitrification of micro-polluted source water by oligotrophic bio-contact oxidation system in situ was studied under the condition of NH4^＋-N 0.246 mg·L^-1,NO2^--N0.009 mg·L^-1,NO3^--N1.730 mg·L^-1,TN1.989 mg·L^-1,UV2540.099 cm^-1and CODMn5.50 mg·L^-1for source water. First,the results showed that the desirable removal efficiency of NH4^＋-N,NO3^--N,TN,and CODMncould reach 73%,80%,77% and 28% respectively under conditions of dissolved oxygen 3.0～4.0 mg·L^-1 and temperature 25 ℃. Second,the nitrogen removal effect could meet the relative standards of class Ⅲ of surface water quality according to GB 3838-2002 in steady running period. Lastly,the characteristics and mechanism of oligotrophic micro-organisms and biofilm system were also discussed in this paper.
出处
《水处理技术》
CAS
CSCD
北大核心
2010年第6期95-99,共5页
Technology of Water Treatment
基金
国家重大科技专项"水体污染控制与治理"(2009ZX07424-006-003)
国家自然科学基金项目(50830303
50778147)
国家高技术研究发展计划(863)项目(2007AA06Z302)
教育部博士点新教师基金项目(20096120120013)
关键词
微污染原水
生物接触氧化
生物脱氮
悬浮填料
micro-polluted source water
bio-contact oxidation
biological denitrification
suspended carrier
