关键词: TNT废水, 总氮超标, 处理技术, 去除效果, 二次污染

Abstract: In order to reduce the environmental hazards caused by the discharge of explosive wastewa⁃ ter，aiming at the removal of total nitrogen in explosive wastewater，the explosive wastewater treatment tech⁃ nology is divided into three categories: physical technology，chemical technology and biotechnology. The characteristics，removal effect and application status of these three technologies are summarized. The analy⁃ sis results show that the physical technology is simple，but it is difficult to effectively and quickly remove ni⁃ trogen from wastewater. Chemical technology has high degradation efficiency，but it is easy to cause second⁃ ary pollution. Biotechnology has strict environmental requirements and is not easy to be used on a large scale. At present，these technologies cannot ensure the complete elimination of total nitrogen pollutants，but only transfer it from one stage to another，which still needs further treatment. The combination of physical technology，chemical technology and biotechnology as a combined process to remove total nitrogen pollut⁃ ants is the future research trend，which can provide reference for the removal of explosive wastewater.

Key words: TNT wastewater, standard exceeding of total nitrogen, treatment technology, removal ef? fect, secondary pollution