Peng Y Z, Li Y Z, Peng C Y, Wang S Y
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150001, China.
Water Sci Technol. 2004;50(6):31-6.
In this study, laboratory-scale experiments were conducted applying a Sequencing Batch Reactor (SBR) activated sludge process to a wastewater stream from a pharmaceutical factory. Nitrogen removal can be achieved via partial nitrification and denitrification and the efficiency was above 99% at 23 degrees C+/-1. The experimental results indicated that the nitrite oxidizers were more sensitive than ammonia oxidizers to the free ammonia in the wastewater. The average accumulation rate of nitrite was much higher than that of nitrate. During nitrogen removal via the nitrite pathway, the end of nitrification and denitrification can be exactly decided by monitoring the variation of pH. Consequently, on-line control for nitrogen removal from the pharmaceutical manufacturing wastewater can be achieved and the cost of operation can be reduced.
在本研究中，进行了实验室规模的实验，将序批式反应器（SBR）活性污泥工艺应用于制药厂的废水流。通过部分硝化和反硝化可实现氮去除，在23℃±1时效率高于99%。实验结果表明，亚硝酸盐氧化菌比氨氧化菌对废水中的游离氨更敏感。亚硝酸盐的平均积累速率远高于硝酸盐。在通过亚硝酸盐途径进行氮去除的过程中，可通过监测pH值的变化准确确定硝化和反硝化的终点。因此，可实现制药生产废水脱氮的在线控制，并降低运营成本。
