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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Evidence for Tin Inhibition of Enhanced Biologioal Phosphorus Removal at a Municipal Wastewater Treatment Plant
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Evidence for Tin Inhibition of Enhanced Biologioal Phosphorus Removal at a Municipal Wastewater Treatment Plant

机译：市政污水处理厂抑制锡去除生物磷的强化证据

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摘要

Concentrations of 34 metals were determined in the concentrated waste activated sludge from a dissolved air flotation unit at an advanced municipal wastewater treatment plant (WWTP) with biological nutrient removal. Reduction in enhanced biological phosphorus removal (EBPR) efficiency was observed at total tin concentrations greater than 4 μg L~(-1) in the solids fraction of the mixed liquor suspended solids. No influence on carbon or nitrogen removal efficiency was found by elevated tin concentrations. Other process control variables and metal concentrations were not correlated with reduced EBPR efficiency on dates with elevated tin levels. The known high contributions of organotin species toward total tin in activated sludges from other municipal WWTPs, and the high toxicity of these compounds, suggests elevated organotin levels may be responsible for the observed reduction in EBPR efficiency.
机译：在一家先进的市政废水处理厂（WWTP）中，通过溶解空气浮选装置的浓缩废水中的活性污泥中含有34种金属的浓度进行了生物营养去除。在混合液悬浮固体的固体部分中总锡浓度大于4μgL〜（-1）时，观察到增强的生物除磷（EBPR）效率降低。锡浓度升高对碳或氮的去除效率没有影响。在锡水平升高的日期，其他过程控制变量和金属浓度与EBPR效率降低无关。已知其他城市污水处理厂的活性污泥中有机锡物质对总锡的高贡献，以及这些化合物的高毒性，表明有机锡水平升高可能是导致观察到的EBPR效率下降的原因。

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