中文摘要：

改良型氧化沟工艺通过在循环廊道内增设缓流板来调控循环比（循环廊道断面通过的循环流量和进水流量的比值）,以此调节好氧区向缺氧区回流的混合液。对比研究了氧化沟循环廊道内增设缓流板前后,污染物碳转化途径的差别。结果表明：增设缓流板调控循环比,有助于提高氧化沟水解有机物和反硝化除磷的能力,促进脱氮除磷过程对含碳有机污染物的利用,从而改变碳污染物在氧化沟系统内的转化途径,优化氧化沟脱氮除磷的整体性能。

英文摘要：

It is always regulated recirculation ratio（namely the ratio of circulation flow to influent flow in circulation compartment section） by increasing flashboard in circulation compartment section to regulate mixed liquor refluxing from aerobic zone to anoxic zone in modified oxidation ditch. It is studied that the differences of carbon conversion pathways before and after increasing flashboard in circulation compartment section. The results show that by increasing flashboard in circulation compartment section the abilities of hydrolytic acidification and denitrifying phosphorus removal are strengthed,as to promote the use of carbon for nitrogen and phosphorus removal. As a result,the pathway of carbon conversion is changed with a apparent raise of nitrogen and phosphorus removal in modified oxidation ditch.