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An innovative solution for managing waterworks sludge : developing an alum sludge-based multi-stage constructed wetland system for wastewater treatment

机译：管理水厂污泥的创新解决方案：开发基于明矾污泥的多级人工湿地系统，用于废水处理

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Waterworks sludge continues to be an inescapable by-product of the potable water treatment process. Accordingly, final disposal of the sludge remains one of the most significant pressing problems for the potable water treatment industry. The possibility of reusing the sludge as a main substrate in a novel constructed wetland system was investigated in this study. Results show that significant phosphorus (P) and other pollutants removal were achieved in the system. With a mean influent BOD5 (5-day biochemical oxygen demand) and COD (chemical oxygen demand) levels of 392.7 mg/l and 579.8 mg/l, respectively, a removal efficiency of 90.6 % and 71.8 %, respectively, was obtained. P removal was however exceptionally high despite the high influent mean P level of 45.3 mg-P/l, which is about 2-3 times the level of P commonly found in sewage. This is attributable to the P adsorption capacity of the alum sludge and this highlights the benefits of its reuse in the system. The paper presents and discusses the findings from a laboratory scale research, which has potential for further large scale implementation.
机译：自来水厂污泥仍然是饮用水处理过程中不可避免的副产品。因此，污泥的最终处置对于饮用水处理行业仍然是最重要的紧迫问题之一。在这项研究中，研究了在新型人工湿地系统中将污泥再用作主要基质的可能性。结果表明，该系统实现了显着的除磷（P）和其他污染物去除效果。进水BOD5（5天生化需氧量）和COD（化学需氧量）的平均水平分别为392.7 mg / l和579.8 mg / l，去除效率分别为90.6％和71.8％。尽管进水平均磷水平很高，为45.3 mg-P / l，这是污水中普遍存在的磷水平的2-3倍，但磷去除率却异常高。这归因于明矾污泥对磷的吸附能力，这突出了其在系统中重复使用的好处。本文介绍并讨论了实验室规模研究的结果，这可能会进一步大规模实施。

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