ENRT工艺在煤焦油深加工废水处理中的实际应用

Application of ENRT process to the treatment of deep processed coal tar wastewater

煤焦油深加工过程中产生的高浓度废水与焦化废水不同,采用传统的A/O工艺及A2/O工艺处理很难达到预期效果。针对现阶段煤焦油废水处理难度大的特点,着重介绍了ENRT工艺在陕西某煤焦油加工企业的实际应用。经过3个月左右的调试,出水COD去除率为92.1%~96.1%,氨氮去除率为92.2%~100%,可达到《污水综合排放标准》（GB 8978—1996）一级排放标准要求。若进一步深度处理,出水可以满足厂区内回用要求。ENRT工艺脱氮效率高,运行成本低,适合于焦化、焦油深加工等化工领域的废水处理。

The high-concentration wastewater produced in the course of deep processed coal tar wastewater is different from coking wastewater. It is very difficult to achieve the expected result by using the traditional A/O process and A2/O process. According to the big difficulty of treating the coal tar wastewater at this stage, the actual application of ENRT process to a Shaanxi coal tar processing enterprise is introduced emphatically. After a three- month debugging,the COD removing rate ranges from 92.1% to 96.1%, and ammonia nitrogen removing rate from 92.2% to 100%, reaching the first class of Integrated Wastewater Discharge Standard （GB 8978-- 1996 ）. If advanced treatment is further carried out,the effluent can meet the reusing requirements for the plant region. The ENRT process is characterized by high denitification rate and low operation costs, suitable for the advanced treatment of wastewater in the chemical engineering fields, such as coking processing, tar processing, etc.