Nikolavcic B, Svardal K, Wandl G, Günther N, Spatzierer G
Vienna University of Technology, Institute of Water Quality, Resources and Waste Management, Karlsplatz 13/226, 1040 Vienna, Austria.
Water Sci Technol. 2008;58(8):1569-74. doi: 10.2166/wst.2008.744.
A process is introduced which utilizes secondary clarifiers for the treatment of combined sewage. Under storm water conditions, surplus sewage bypasses the aeration tanks after primary treatment and is directly introduced into the secondary clarifiers. The hydraulic capacity of existing activated sludge plants can be increased without additional tank volume. Particulate matter as well as dissolved compounds are removed to a high extent. Investigations on a full scale treatment plant (100,000 p.e.) show that the effluent quality is comparable with full biological treatment, even if the hydraulic loading is increased by 50%.
介绍了一种利用二次沉淀池处理混合污水的工艺。在暴雨条件下，剩余污水在一级处理后绕过曝气池，直接引入二次沉淀池。现有活性污泥处理厂的水力处理能力可在不增加池体容积的情况下得到提高。颗粒物以及溶解性化合物能被大量去除。对一座规模为10万人口当量的全尺寸处理厂的研究表明，即使水力负荷提高50%，出水水质仍与完全生物处理相当。
