方元狄;张静;郑中原;温东辉;

• 1:北京大学环境科学与工程学院

摘要(Abstract)：

焦化废水是一种典型的难降解工业废水,组分复杂,生物毒性高,大多采用生物处理联合物化深度处理的工艺,以满足炼焦化学工业的污染排放标准,但其排水安全性仍然令人担忧。为研究工艺排水安全性,选择发光细菌青海弧菌Q67、稀有鮈鲫(Gobiocypris rasus)血红细胞、活性污泥微生物群落为测试生物,研究了焦化废水及各处理阶段出水的急性毒性和遗传毒性变化,进而识别影响生物毒性的水质因子。焦化废水经过序批式生物膜反应器处理后,出水急性毒性比进水下降71%,遗传毒性下降为90%以上的轻度以下损伤,显示生物强化处理对焦化废水生物毒性有良好的去除作用。生物处理出水再经过深度处理后,则表现出不同的毒性变化:活性炭吸附法对生物急性毒性的消除最佳,但遗传毒性较生物处理出水有所升高;臭氧氧化法不仅水质改善效率差,且最终出水的生物急性毒性与遗传毒性均升高;臭氧催化氧化法对水中残留有机物去除效率较高,但也造成出水急性毒性与遗传毒性的升高。各水样对青海弧菌Q67的急性毒性与有机物、氮等水质指标表现出较强相关性,而遗传毒性与水质指标之间的相关性不显著。研究结果可为评价和改进处理工艺、保障水体生态安全提供参考。

关键词(KeyWords)： 焦化废水;生物急性毒性;遗传毒性;生物处理;深度处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51378019,51529801)

作者(Author): 方元狄;张静;郑中原;温东辉;

Email:

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