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设计利用曝气生物法处理经过两级接触氧化的制药废水,研究了曝气生物滤池的启动和水力停留时间、水力负荷及进水COD对废水中COD、NH4+-N去除率的影响。结果表明,在气水体积比为10:1,水力停留时间为12 h时,COD去除率最大;进水COD在320～780 mg/L,COD去除率随进COD的增加而增加;在进水COD为320～780 mg/L,水力停留时间12 h,水力负荷0.23 L/h,气水体积比10:1的条件下,NH4+-N的去除率稳定在45%～56%。出水达到国家生活杂用水标准。
The biological aerated method was used to treat the biologically treated pharmaceutical wastewater. The effects of aeration biofilter start-up, hydraulic retention time, hydraulic load and influent COD on COD, NH4 + -N removal efficiency in wastewater were studied. The results showed that the COD removal efficiency was the highest when the gas-water volume ratio was 10: 1 and the hydraulic retention time was 12 h. The influent COD was between 320 and 780 mg / L, and the COD removal rate increased with the increase of COD The removal efficiency of NH4 + -N was stable at 45% -56% under the condition of water COD of 320-780 mg / L, hydraulic retention time of 12 h, hydraulic load of 0.23 L / h and air / water volume ratio of 10: 1. Water reaches the miscellaneous water standard of national life.