臭氧氧化—包埋菌流化床生物处理组合工艺深度处理煤气化废水

Advanced Treatment of Coal Gasification Wastewater by Ozonation-Embedded Bacteria Fluidized Bed Process

采用臭氧氧化—包埋菌流化床生物处理组合工艺对煤气化废水进行深度处理。实验结果表明：当臭氧的质量浓度20 mg/L、臭氧进气流量1.5 L/min、臭氧通气时间30 min、包埋菌流化床水力停留时间24 h时，臭氧氧化工序的COD去除率达到30.0%~40.0%，总酚去除率达到100.0%；包埋菌流化床工序的COD去除率达到60.0%以上，氨氮的去除率大于95.0%；经组合工艺处理后，出水COD〈60 mg/L，ρ（氨氮）〈1.0 mg/L，ρ（总酚）未检出，色度小于50倍，达到GB8978—1996《污水综合排放标准》中的一级排放标准。

Coal gasification wastewater was treated by the ozonation- embedded bacteria fluidized bed process. When the ozone mass concentration is 20 mg/L,the ozone gas flow is 1.5 L/min,the ozone aeration time is 30 min,and the HRT in fluidized bed reactor is 24 h,the removal rates of COD and total phenol in the ozonation unit are 30.0%-40.0% and 100.0% respectively;the removal rates of COD and ammonia nitrogen in the fluidized bed reactor are above 60.0% and above 95.0% respectively;the final effluent COD is less than 60 mg/L,ρ（NH3-N） is less than 60 mg/L,ρ（total phenol） is not detected,the chroma is less than 50 times,which can meet the first grade of the national discharge standards of GB8978-1996.