摘要：

采用SBR工艺研究了海水盐度对短程硝化反硝化影响,同时研究了不同海水盐度下,温度、pH、氨氮负荷对氨氮去除率的影响。试验结果表明:大生活用水范围内(海水占生活用水的比例在35%以内)的海水盐度情况下仍能实现短程硝化反硝化,但不同海水盐度情况下的氨氮去除率与氨氮负荷有关,随着海水占生活污水比例的增加氨氮负荷应逐渐减少。当短程硝化系统的单位MLSS氨氮负荷小于0.15kg/(kg·d)时,氨氮去除率仍可达到90%以上。升高温度有利于提高短程硝化脱氮效率,反应温度应保持在25～30℃。

关键词: 海水盐度, 短程硝化反硝化, 氨氮负荷, 氨氮去除率

Abstract:

Effects of seawater salinity on the nitrification denitrification via nitrite pathway are studied by SBR process. Several parameters of temperature,pH and NH₄⁺-N load are also studied to evaluate their effects on nitrogen removal efficiency under different salinity. The experimental results indicate that nitrification denitrification via nitrite pathway can be accomplished still in the salinity range of domestic sewage(the proportion of seawater in sewage is not large than 35%),but the nitrogen removal efficiency has relations with the NH₄⁺-N load having different salinity. To maintain the nitrification via nitrite and a relatively high ammonia nitrogen removal efficiency, the NH₄⁺-N load should be reduced with the increasing of the proportion of seawater in domestic sewage. The nitrogen removal efficiency reaches over 90% when the NH₄⁺-N load is lower than reaction temperature should be kept at 25 ℃ to 30 ℃.

Key words: seawater salinity, nitrification-denitrification via nitrita pathway, NH₄⁺-N load, nitrogen removal efficiency

中图分类号: 

• P746

• TU992.3