微压流化式复合生物反应器的同步脱氮

通过对曝气系统的调节，微压流化式复合生物反应器（MP-FHBR）内可以实现好氧区和缺氧区共存，利用这一特点和MP-FHBR中同时存在的活性污泥﹑悬浮生物膜复合生物体系，进行了同步脱氮的试验研究。结果表明，MP-FHBR在好氧-缺氧条件下，实现了同步脱氮过程，TN和COD的平均去除率分别达到77.5%和98.3%。降低DO质量浓度使反应器内形成完全缺氧环境，对MP-FHBR同步脱氮效果没有显著影响，但会降低系统去除COD的效果；而提高DO质量浓度使反应器内形成完全好氧环境，MP-FHBR同步脱氮效果显著下降。在一定范围内提高进水COD/TN有利于提高MP-FHBR同步脱氮效果，COD/TN 由2升高到10，TN平均去除率由58.4%提高到78.8%，而继续提高COD/TN对系统同步脱氮效果的影响并不明显。在反应器允许的条件下，提高污泥质量浓度(MLSS)有利于提高系统反硝化脱氮效果，TN去除率随MLSS的增加而提高。

Simulataneous Nitrogen Removal in the Micro-Pressurized Fluidized Hybrid Biological Reactor

By regulating aeration system,anoxic and aerobic areas can coexist in the micro-pressurized fluidized hybrid biological reactor(MP-FHBR).Using the characteristic and the mixed organism of activated sludge and suspended biofilm coexisting in the MP-FHBR,study was conducted for simulataneous nitrogen removal.The experimental results showed that,nitrogen can be effectively simulataneous removal under the condition of anoxic-aerobic in the MP-FHBR.Under the conditions of this experiment,removal rates of TN and COD reached 77.5% and 98.3% respectively.Reducing the DO concentration to form completely anoxic environment within the reactor have no significant influence on TN removal effect of MP-FHBR,but it reduce the COD removal rate of the system.Improving the DO concentration to form completely aerobic environment within the reactor,TN removal effect of MP-FHBR decreased significantly.With the increasing of COD/TN,the TN removal efficiency was increased.TN removal efficiency was increased from 58.4% to 78.8%,when COD/TN was increased from 2 to 10,further increasing COD/TN,TN removal effect was not significantly increased.With the increase of MLSS,the TN removal efficiency was increased,leading to a more apparent denitrification efficiency of MP-FHBR.