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Performance and design considerations for an anaerobic moving bed biofilm reactor treating brewery wastewater: Impact of surface area loading rate and temperature
Journal of Environmental Management ( IF 8.0 ) Pub Date : 2017-06-05 , DOI: 10.1016/j.jenvman.2017.05.093
A. di Biase , T.R. Devlin , M.S. Kowalski , J.A. Oleszkiewicz

Three 4 L anaerobic moving bed biofilm reactors (AMBBR) treated brewery wastewater with AC920 media providing 680 m2 protected surface area per m3 of media. Different hydraulic retention times (HRT; 24, 18, 12, 10, 8 and 6 h) at 40% media fill and 35 °C, as well as different temperatures (15, 25 and 35 °C) at 50% media fill and 18 h HRT were examined. Best performance at 35 °C and 40% media fill was observed when HRT was 18 h, which corresponded with 92% removal of soluble COD (sCOD). Organic loading rates (OLR) above 24 kg-COD m−3d−1 decreased performance below 80% sCOD removal at 35 °C and 40% media fill. The reason was confirmed to be that surface area loading rates (SALR) above 50 g-sCOD m−2d−1 caused excessive biofilm thickness that filled up internal channels of the media, leading to mass transfer limitations. Temperature had a very significant impact on process performance with 50% media fill and 18 h HRT. Biomass concentrations were significantly higher at lower temperatures. At 15 °C the mass of volatile solids (VS) was more than three times higher than at 35 °C for the same OLR. Biofilms acclimated to 25 °C and 15 °C achieved removal of 80% sCOD at SALR of 10 g-sCOD m−2d−1 and 1.0 g-sCOD m−2d−1, respectively. Even though biomass concentrations were higher at lower temperature, biofilm acclimated to 25 °C and 15 °C performed significantly slower than that acclimated to 35 °C.



中文翻译:

厌氧移动床生物膜反应器处理啤酒废水的性能和设计注意事项:表面积加载速率和温度的影响

三个带有AC920介质的4 L厌氧移动床生物膜反应器(AMBBR)处理的啤酒废水,每m 3介质可提供680 m 2的受保护表面积。在40%介质填充和35°C的情况下,不同的水力停留时间(HRT; 24、18、12、10、8和6 h)以及在50%介质填充和不同的温度(15、25和35°C)下检查HRT 18小时。当HRT为18 h时,在35°C和40%的介质填充下观察到最佳性能,这对应于92%的可溶性COD(sCOD)去除率。高于24 kg-COD m -3 d -1的有机负载率(OLR)在35°C和40%的介质填充量下,去除80%sCOD以下的性能下降。确认原因是表面积负载率(SALR)高于50 g-sCOD m -2 d-1导致生物膜厚度过大,从而填满了介质的内部通道,从而导致了传质限制​​。温度对50%介质填充和18 h HRT的工艺性能有非常显着的影响。在较低温度下,生物质浓度显着较高。对于相同的OLR,在15°C时,挥发性固体(VS)的质量是35°C时的三倍以上。适应25°C和15°C的生物膜在SALR分别为10 g-sCOD m -2 d -1和1.0 g-sCOD m -2 d -1时实现了80%sCOD的去除。即使在较低温度下生物量浓度较高,适应于25°C和15°C的生物膜的运行速度也明显低于适应于35°C的生物膜。

更新日期:2017-06-05
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