摘要
采用生物慢滤技术处理含有蒽的微污染水。当反应器中浊度、氨氮、CODMn的去除率基本恒定时,认为慢滤反应器已进入动态平衡状态。在反应器进入平衡状态后,分别进行去除蒽的试验研究。实验结果表明,填加活性炭生物慢滤反应器能在更短运行时间内对浊度、氨氮、CODMn等达到稳定的去除效果,但随着运行时间的增加,填加活性炭反应器与石英砂反应器有相近的去除效率;对含有同一浓度蒽的原水(1 000ng/L),形成成熟稳定生物膜的慢滤反应器运行3d后,对蒽有较为稳定的去除率;不同浓度蒽原水(100～10 000ng/L)经过慢滤反应器后,出水蒽含量均降低到100ng/L以下,蒽的去除率在70%以上;慢滤反应器的滤料高度对蒽的去除效果有一定的影响,但反应器对蒽的去除主要发生在填料上部30cm高度内。
A study is made of the treatment of the anthracene in micro-polluted raw water by slow sand filtration.When the removal rate of the turbidity,ammonia and nitrogen is stable,the slow sand filtration is considered to be in the status of dynamic balance,in which status the experimental study of anthracene degradation is carried on.The results show that,the slow sand filtration reactors with extra activated carbon filled have stable removal efficiency to the turbidity,ammonia and nitrogen in a shorter time,but the reactors with activated carbon or without almost have the same removal rate with the study processing.In the status of dynamic balance,the reactors need 3 days to have a stable removal rate for the same concentration of anthracene（1 000 ng/L）.The anthracene with different concentrations（100～10 000 ng/L） of raw water can be treated to be lower than 100 ng/L and the removal ratio is above 70% by the reactor of slow sand filtration;The height of the reactor has some influence on the removal of the anthracene,but the main point is in the above 30 cm of the filler.
出处
《中国农村水利水电》
北大核心
2011年第3期152-155,共4页
China Rural Water and Hydropower
基金
国家水体污染控制与治理重大专项课题资助项目(2008ZX07425-005)
国家自然科学基金资助项目(50709044)
关键词
生物慢滤
微污染水
蒽
活性炭
slow sand filtration
micro-polluted raw water
anthracene
activated carbon
