Abstract:

The Carrousel oxidation ditch system of the pre-biological selector has been used for studying its influence on operation effect. The results show that the influence of biological selector volume ratio changes on the COD removing rate and nitrification reaction is not significant，but has certain influence on denitrification and TP removingrates. The TN removing efficiency increases with the increase of volume ratio，while TP removing efficiency increases gradually when the volume ratio is less than 4.86%. There is a downward trend in TN removal efficiencywhile TP removal efficiency does not change significantly，when the volume ratio increases continuously. Biologicalselector can improve the sludge settlement performance particularly and SVI keeps between 63 to 139 mL/g.

Key words: biological selector, volume ratio, oxidation ditch, denigrification and dephophorization, sludge settlement performance

摘要：

采用前置生物选择器的Carrousel氧化沟系统研究生物选择器对氧化沟运行效果的影响。结果表明:生物选择器的体积比对COD的去除和硝化反应影响不明显,但对反硝化反应和总磷的去除有一定影响;当体积比<4.86%时,随着体积比的增大,总氮去除率呈上升趋势,而总磷去除率则逐渐增大。继续增大体积比,总磷变化不明显而总氮去除率下降。生物选择器能显著提高污泥沉降性能,SVI维持在63～139 mL/g。

关键词: 生物选择器, 体积比, 氧化沟, 脱氮除磷, 污泥沉降性能

CLC Number: 

• X703