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炼化企业中水紫外线消毒及其影响因素

Keywords: 炼化企业,中水回用,紫外线消毒,紫外线透射率,光复活,暗修复

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Abstract:

研究水质对254nm紫外线透射率的影响,通过动态实验考察了照射时间、254nm紫外线透射率以及紫外线剂量对炼化企业中水消毒效果的影响并同时考察异养菌、硫酸盐还原菌和铁细菌的光复活及暗修复现象。结果表明,有机物是影响炼化企业中水紫外线消毒的重要因素;紫外线对炼化企业中水中的异养菌具有良好的灭活作用;增加照射时间对消毒效果的提升作用受254nm紫外线透射率的影响;紫外线透射率在较低的范围内时对消毒效果的影响相对较大,在较高的范围内时影响较小;紫外线剂量-响应曲线受254nm紫外线透射率的影响;剂量的“成分”,即照射时间和透射率的不同组合,也会对消毒效果产生影响;在80mJ/cm2的剂量下,20h内异养菌出现了较强烈的光复活和暗修复现象,铁细菌仅出现了明显的光复活现象,硫酸盐还原菌没有表现出明显的复活。

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