用厌氧酸化预处理焦化废水的研究

在采用色谱-质谱(GC/MS)联用仪分析北京焦化厂废水中有机物组分及浓度的基础上,研究厌氧酸化对焦化废水可生物处理性能的影响,并探讨厌氧酸化作为焦化废水好氧生物处理预处理的可行性。试验结果表明,焦化废水经6h厌氧酸化,12h好氧曝气,COD去除率可达90％以上,比未用厌氧酸化预处理的COD去除率提高近40％。当焦化废水进水COD为1780mg/l时,出水COD可降至158mg/l。

Study on the Pretreatment of Coke-Plant Wastewater by Anaerobic Acidification

According to analysis of the constituents and concentrations of organic pollutants in wastewater at Beijing Goke Plant using combined gas chromatography and mass spectrometry(GC/MS), the effect of anaerobic acidification on the bio-treatability of coke-plant wastewater has been studied and the possibility of using anaerobic acidification as pretreatment of aerobic treatment has also been explored. The results described that aerobic biotreatability of coke-plant effluent could obviously increase through 2-6 hours' anaerobic acidification. After 6 hours and 12 hours, anaerobic acidification, COD in the effluent could be removed by 91%, i.e. removal rate increased about40% more than that without applying anaerobic acidification. As the inffluent COD of the wastewater was 1780 mg/L, the effluent COD removed to 158 mg/L.