摘要
采用表面流人工湿地系统静态小试装置,考察了低、中、高3组不同进水COD/N(2,5,10)对系统中氮、磷及COD去除效果的影响。结果表明:进水C/N的变化对COD的去除率影响不大,平均去除率达到94.6%。TN的去除率随着COD/N的增大而逐渐升高,在C/N=5时达到63.8%,继续提高COD/N,TN的去除率变化不大。NH4+-N去除率随着COD/N的增加而降低。随着碳源的增加,释磷菌能够从进水中获得充足的碳源,从而可以比较充分地释磷,因此,磷的去除率随COD/N的增加而提高。
The effects of different influent COD/N ratios （2,5,10） on the removal efficiency of total nitrogen, phosphorus and COD were investigated in surface-flow constructed wetlands. The results showed that regardless of the COD/N ratio, excellent COD （average 94.6% ） removal efficiency was maintained throughout the experiment. TN removal efficiency was enhanced as COD/N ratio increased, and reached to 63.8% when COD/ N was 5. Afterwards, it increased very slowly. NH4-N removal efficiency decreased as COD/N ratio increased. With the increase of COD/N ratio, more phosphorous was removed because PAOs could get more organic carbon source from the influent to release more phosphorus.
出处
《环境工程学报》
CAS
CSCD
北大核心
2010年第4期767-770,共4页
Chinese Journal of Environmental Engineering
基金
国家重大科技专项(2009ZX07210-009)
国家科技部"十一五"科技支撑计划课题(2006BAC10B03)
西部交通建设科技项目(200731822108)
关键词
人工湿地
COD/N
COD
脱氮
除磷
constructed wetlands
COD/N ratio
COD
nitrogen removal
phosphorus removal
