摘要
在扬水曝气条件下,模拟原位条件进行了贫营养生物膜技术净化微污染原水的试验研究,分析测定其对氮源污染物及有机污染物的去除效果。试验结果表明,扬水曝气-贫营养生物膜组合技术用于净化微污染原水是可行的;在水温为10～23℃,溶解氧浓度为4.0～6.0mg/L、NH4+-N 0.230mg/L、NO2--N 0.010mg/L、NO3--N 1.125mg/L、TN 2.010mg/L、CODMn3.140mg/L、TOC 3.012mg/L和BOD51.540mg/L的条件下,系统稳定运行时的氨氮、硝氮、总氮及TOC去除率范围分别为82%～100%、62%～79%、71%～80%和73%～80%,亚硝氮已基本检测不到,BOD5/CODMn比值在0.05～0.20之间,说明该组合系统的脱氮效果可满足地表水环境Ⅲ类水体的质量标准要求,且生物稳定性可得到明显提高。另外,还考察了运行过程中生物膜上贫营养反硝化细菌数量及生物相的变化情况,并探讨了贫营养生物膜系统的净水机理。
Under the operation of multifunctional device for water lifting and aeration（MDWLA）, in situ simulation experiment is made by use of the oligotrophic biofilm process for pretreatment of micro-polluted raw water in order to investigate the removal effects of nitrogen and organic matter. The experimental results show that the combined technique of water-lifting aeration and oligotrophic biofilm process is feasible, and the removal rate of ammonia, nitrate, total nitrogen and TOC in steady running period range from 82%-100%, 62%-79%, 71% -80% and 73% -80%, respectively, under the condition of temperature 10-23℃, dissolved oxygen 4. 046.0 mg/L, NH＋-N 0.230 mg/L, NO2-N 0.010 mg/L, NO;-N 1. 125 rag/L, TN 2. 010 mg/L, CODMn 3. 140 mg/L and BOD5 1. 540 mg/L for source water, also the nitrite is poorly detected and the ratio of BOD5 to CODM, is in the range of 0.05 to 0.20. Obviously, the nitrogen removal effects can meet the requirements of class Ⅲ of surface water quality according to GB3838--2002 and the biological stability can be improved under stable operation condition of the combined process. Lastly, the changes of oligotrophic denitrifying bacteria number and biological phase, and water purifying mechanism of oligotrophic biofilm system are also discussed.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第1期125-131,146,共8页
Journal of Chongqing University
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)
西安市科技计划项目(SF08022)
教育部博士点新教师基金项目(20096120120013)
关键词
扬水曝气
贫营养生物膜
微污染原水
反硝化细菌
water-lifting aeration
oligotrophic biofilm
micro-polluted raw water
denitrifying bacteria
