进水有机负荷和曝气速率对强化脱氮的影响

摘要

In this study, the effects of influent organic loading rates ( OLRs) and aeration rates on partial nitrification and denitrification ( PND) in IASBR were investigated. Experimental results showed that when the OLRs were increased from 0. 35 g/( L·d) to 1. 00 g/( L·d) , at the aeration rate of 0. 6 L/min condition, the CODCr removal rates were decreased from 97. 67% to 95. 80%, and the TN removal rates were reduced from 92. 07% to 85. 64%;partial nitrification and denitrification ratesηwere increased from 38. 96% to 84. 59%. In the three stages, the CODCr removal rates were increased with the increase of the aeration rates, the TN removal rates changes had no apparent relationship with the aeration rates; however, η decreased with the increase of the aeration rate.ηValue was higher, leading to the TN removal rate lower.%以模拟含氮废水为处理对象，利用间歇曝气序批式生物反应器比较进水有机负荷和曝气速率对短程硝化反硝化强化脱氮的影响.实验结果发现，进水有机负荷由0．35 g/(L·d)增加到1．00 g/(L·d)时，在同一个曝气速率0．6 L /min 条件下， CODCr的去除率由97．67%减小到95．80%， TN 的去除率由92．07%减少到85．64%；短程硝化反硝化效率η从38．96%升高到84．59%.在3个阶段中， CODCr的去除率均随着曝气速率的增加而增加；总氮TN的去除率变化与曝气速率的增加没有明显的关系；η随着曝气速率的增加而减少.η值越高，而TN的去除率越低.