摘要
以焦化废水为考察对象,在不同水力负荷条件下,通过分析各个反应器对COD的去除特性以及各种形态氮的转化机制,研究了BANF/BAF组合工艺处理焦化废水的脱氮除碳效果。结果表明,随着水力负荷的增加,系统对COD、NH_4^+-N、TN、有机氮的去除率均在下降,但水力负荷从0.196 m^3/(m^2·h)上升到0.244 m^3/(m^2·h)的过程中,该工艺对污染物的去除效果只呈现略微的下降趋势,当继续上升到0.293 m^3/(m^2·h)时,该工艺对污染物的去除效果明显下降。在0.244 m^3/(m^2·h)的最佳水力负荷条件下,系统对COD、TN、NH_4^+-N、有机氮的平均去除率分别为87.5%、80.0%、97.2%、99.4%。
Using the coking wastewater as a study object, under different hydraulic loading conditions, carbon and nitrogen removal in the BANF/BAF process was studied through the analysis of characteristics of COD removal and the conversion mechanism of various forms of nitrogen in each reactor. The results showed that with the increase of the hydraulic loading, the removal rates of COD, NH4^＋ - N, TN and organic nitrogen declined. However, when the hydraulic loading increased from0. 196 m^3/（m^2·h） to 0. 244 m^3/（m^2·h）, the removal efficiency of the contaminants only showed a slightly downward trend, while when the hydraulic loading rose up to 0. 293m^3/（m^2·h） , removal effect of the contaminants decreased significantly. At a hydraulic loading of 0.244m^3/（m^2·h）, the average removal rates of COD, TN, NH4^＋ - N, and organic nitrogen were 87.5%, 80.0%, 97.2% and 99.4%, respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第21期94-98,共5页
China Water & Wastewater
关键词
焦化废水
生物滤池
水力负荷
脱氮除碳
coking wastewater
biological filter
hydraulic loading
removal of carbon and nitrogen
