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活性污泥缺氧转化1-2-7-三氨基-8-羟基-3-6-萘二磺酸

Keywords: 1-2-7-三氨基-8-羟基-3-6-萘二磺酸,活性污泥,缺氧转化,偶氮染料

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Abstract:

1-2-7-三氨基-8-羟基-3-6-萘二磺酸(TAHNDS)作为偶氮染料的脱色产物很难被常规的厌氧-好氧染料废水处理工艺所去除。研究了未经驯化的活性污泥对TAHNDS的缺氧转化效果。结果表明,只有在特定的缺氧条件下(ORP在-50~-150mV之间),TAHNDS才能被活性污泥所降解转化。当浓度在10~80mg/L范围内,TAHNDS可在72h内转化93%以上。加入100mg/L的硝酸盐和0.64mmol/L的氧化还原介体蒽醌-2-磺酸钠(AQS)可将40mg/L的TAHNDS的转化时间从84h缩短到36h。光谱及HPLC-MS分析表明,TAHNDS在缺氧条件下主要是通过脱氨基和脱磺酸作用生成已知可好氧生物降解的3,5-二氨基-4-羟基萘-2-磺酸。因此,缺氧处理有望作为预处理工艺促进废水中TAHNDS的完全降解。

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