摘要
分别采用恒定鼓风量[0.4m_(空气)~3/(m_水~3·h)]和恒定DO(0.5mg/L)的连续曝气控制方式,通过控制温度为30±1℃、pH值为7.9~8.2,研究两种曝气控制方式对于低C/N城市污水短程硝化的特性。结果表明:恒定曝气量[0.4m_(空气)~3/(m_水~3·h)]实现稳定短程硝化的时间明显快于恒定DO(0.5 mg/L)的曝气控制方式,而且恒定曝气量实现稳定的亚硝酸盐积累率达95%以上,明显地高于恒定DO(0.5 mg/L)的曝气控制方式的NO_2-N积累率85%,恒定曝气量[0.4 m_(空气)~3/(m_水~3·h)]的控制方式短程硝化的曝气控制时间宜控制为4 h,而恒定DO(0.5 mg/L)的控制方式短程硝化的曝气控制时间宜控制为3 h。
In this experiment, under the conditions of temperature of 3 0±1℃ and pH value of 7 .9 to 8.2 , the shortcut nitrification characteristics of low C /N urban wastewater are researched by the control modes of constant blast volume [ 0.4m^3空气/（m^3水·h） ] andconstant DO （0.5 mg/L） of continuous aeration. The results showed that the time required for the constant aeration mode [ 0.4m^3空气/（m^3水·h）] was significantly less than that of the constant D0（0.5 mg/L） aeration control mode to achieve stable short cut nitrification. And NO2^- -N accumulation efficiency of constant aeration reached to 9 5%, which was higher than the rate of 85% for constant DO （0.5 mg/L） aeration control. In addition, the time of shortcut nitrification aeration with constant aeration [0.4m^3空气/（m^3水·h）] should be controlled to 4 h, while the mode of constant DO （0.5 mg/L） should be at 3 h.
出处
《净水技术》
CAS
2017年第9期53-56,共4页
Water Purification Technology
基金
广东省省级科技计划项目(2014B090904021)
国家水体污染控制与治理科技重大专项(2011ZX07302-001)
