| H－酸废母液的湿式空气氧化处理 |
| 摘要点击 653 全文点击 539 投稿时间：1995-06-06 |
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| 中文关键词 湿式空气氧化 H－酸 可生化性 |
| 英文关键词 wet air oxidation H-acid biodegradability |
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| 中文摘要 |
| 研究了用湿式氧化法处理染料中间体H-酸废母液。在200-250℃,Po2=1-3MPa下,H-酸的湿式氧化反应可分为2个阶段,最初10min为快反应段,COD快速下降,UV/可见光吸光度先急剧升高,之后快速降低;慢反应段延续到30min,COD和吸光度缓慢下降,其后变化不大。经过温式氧化处理之后,可生化性大幅度改善,在160℃,充氧3MPa,反应1h,可使10g/L的H-酸液的COD降低50%,BOD5/COD由3.4%升高到33.3%.反应后尾气中不含SO2,NOx类有害气体。 |
| 英文摘要 |
| Under the condition of reaction temperatures of 200-250℃,initial oxygen partial pressures of 1-3 MPa,the wet air oxidation(WAO) of H-acid has 2-step process,including rapid reaction step,in which during the first 10 minutes after the beginning of the reaction COD is decreased rapidly,and UV/Vis.absorbance is increased drastically at first and then reduced rapidly,and slow reaction step,in which, both COD and UV/Vis.absorbance are decreased slowly during about 20 minutes.WAO treatment can improve biodegradability of H-acid significantly.After 1 hour reaction carried out at 160℃ and 3 MPa initial oxygen pressure,COD was decreased by 50%,and the BOD5/COD ratio of 10 g/L H-acid solution was increased from 3.4% to 33.3%.The offgas from the WAO treatment of H-acid contains undetectable amount of SO2 and nitrogen oxides. |
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