Canler J P, Royer C, Duchène P
Cemagref, Unité de Recherche Qualité des Eaux et Prévention des Pollutions, Quai Chauveau, Lyon, France.
Water Sci Technol. 2001;44(2-3):219-26.
Biological grease treatment is rapidly expanding in France, with about sixty plants recorded in 1998. They are designed at a volumetric loading of 2.5 kg COD/m3 of reactor per day. Several sites have been selected for their representativity and studied. Prior to detailed monitoring over a long period, preliminary investigations provided some information on the operation of these reactors. They showed that most of them are not optimized (low removal efficiency), but have limited operational constraints given their low load. This study enabled us to assess the quantity actually skimmed from the surface of the aerated grease separator in relation to the lipids in raw sewage, and to define the precautions to be taken for sampling and analysis of grease, before any data interpretation. A detailed measurement series was then implemented. It shows the considerable value of this process for the reduction of lipids and highlights the main operational parameters in order to obtain high performance while keeping low operating constraints.
生物油脂处理在法国正迅速发展，1998年记录在案的处理厂约有60家。这些处理厂的设计容积负荷为每天每立方米反应器2.5千克化学需氧量。已选择了几个具有代表性的场地并进行了研究。在进行长期详细监测之前，初步调查提供了一些关于这些反应器运行情况的信息。调查表明，大多数反应器未得到优化（去除效率低），但由于负荷低，运行限制有限。这项研究使我们能够评估从曝气油脂分离器表面实际撇取的油脂量与原污水中脂质的关系，并在进行任何数据解释之前确定油脂采样和分析应采取的预防措施。然后实施了一系列详细的测量。结果显示了该工艺在减少脂质方面的巨大价值，并突出了主要运行参数，以便在保持低运行限制的同时获得高性能。
