Brito Gabriela C B, Lange Liséte C, Santos Vera L, Amaral Míriam C S, Moravia Wagner G
Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, Antônio Carlos Av. 6627, ZIP 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Department of Microbiology, Universidade Federal de Minas Gerais, Antônio Carlos Av. 6627, ZIP 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Water Sci Technol. 2019 Jan;79(2):398-410. doi: 10.2166/wst.2019.067.
In this study, commercial baker's yeast (Saccharomyces cerevisiae) was employed as a novel inoculum for a membrane bioreactor (MBRy). It was applied to landfill leachate (LFL) treatment to remove recalcitrant organic compounds as well as for the assimilation of recalcitrant compounds, since yeasts have a high ability to break such compounds down. The MBR was inoculated with 10 g L of commercial baker's yeast and was operated at a hydraulic retention time of 48 h and pH of 3.5. The specific air demand based on the membrane area (SADm) was maintained at 0.6 m h m. The MBRy achieved chemical oxygen demand (COD), color, NH, and humic substances removal of 68, 79, 68, and 50%, respectively. Furthermore, the MBRy showed lower fouling potential, which can be attributed to the low extracellular polymeric substances production, as the formation of a cake layer was the major mechanism of membrane fouling. The work demonstrated that novel MBR is a promising technology for treating recalcitrant landfill leachate.
在本研究中，商业烘焙酵母（酿酒酵母）被用作膜生物反应器（MBRy）的新型接种物。它被应用于垃圾渗滤液（LFL）处理，以去除难降解有机化合物以及同化难降解化合物，因为酵母具有很高的分解此类化合物的能力。MBR接种了10 g/L的商业烘焙酵母，并在水力停留时间为48 h和pH值为3.5的条件下运行。基于膜面积的特定空气需求量（SADm）保持在0.6 m³/(h·m²)。MBRy对化学需氧量（COD）、色度、氨氮和腐殖质的去除率分别达到了68%、79%、68%和50%。此外，MBRy显示出较低的污染潜力，这可归因于细胞外聚合物产量较低，因为形成滤饼层是膜污染的主要机制。这项工作表明，新型MBR是一种处理难降解垃圾渗滤液的有前景的技术。
