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两级EGSB反应器处理焦化废水的实验研究

Keywords: 焦化废水,EGSB反应器,微氧

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Abstract:

采用两级膨胀颗粒污泥床(EGSB)反应器在微氧条件下处理焦化废水,分别考察了一级和二级EGSB反应器(EGSBⅠ和EGSBⅡ)对污染物的去除效果。结果表明,系统能够高效去除COD和NH3-N,EGSBⅠ主要用于去除COD,EGSBⅡ主要用于去除NH3-N。总水力停留时间(HRT)为24h(EGSBⅠ12h+EGSBⅡ12h),系统对952mg/L的COD、41.3mg/L的NH3-N、34.55mg/L的挥发酚、295.8mg/L的硫氰化物和0.89mg/L的氰化物的平均去除率分别为78.1%、81.3%、100%、98.1%和89.9%。出水COD、NH3-N、挥发酚、硫氰化物和氰化物的平均浓度分别为208、7.7、0、5.7和0.09mg/L。出水NH3-N、挥发酚和氰化物浓度均低于《炼焦化学工业污染物排放标准》(GB16171-2012)的直接排放限值。

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