A2/O工艺在焦化废水处理中的应用

Coking Wastewater Treatment by A2/O Process

焦化废水组分复杂、 生物难降解、 有机物含量高, 是国内外废水处理领域的难题之一.根据工作实际可知, 当好氧池溶解氧浓度为4～6mg/L时, 生化系统COD去除率较高, 好氧池pH值为7～8、 溶氧为5mg/L以上时, 系统氨氮去除率较高, 当好氧池pH值降至6.8以下时, 氨氮去除率急速下降; 当污水温度为30～35℃时, 温度变化对生化系统影响不大.

The coking wastewater has complex component and highly biology difficult to degrade the organic matter.It is one of the domain difficult problems about wastewater processing in domestic and foreign countries. According to the actual work, when the concentration of dissolved oxygen in the aerobic tank was 4 - 6mg/L, the removal rate of COl） in the biochemical system was high, the pH value of the aerobic pool was 7 - 8 and the dissolved oxygen was above 5mg/L, the removal rate of ammonia nitrogen was higher. When the pH value of the aerobic pool was below 6.8, the removal rate of ammonia nitrogen droped rapidly; when the sewage temperature was 30 - 35℃, the temperature changes Chemistry had little influence on the biochemical system.