Two bench-scale Self-Forming Dynamic Membrane BioReactors (SFD MBR), equipped with 50 µm nylon meshes were set up and operated under aerobic conditions in order to treat canning and winery wastewaters. The results showed different behaviors of the two systems, confirming the strong dependence of SFD MBR performance on the type of biomass and, in turn, on the type of stream being treated. Both plants achieved good results in terms of effluent quality, demonstrating the suitability of the proposed technology. Median values of effluent turbidity were 2.7 and 15.4 NTU (Nephelometric Turbidity Units) in the reactors fed with canning wastewater and winery wastewater, respectively. The removal of organic matter (as COD, Chemical Oxygen Demand) was consistently above 90%, although the retention of suspended solids was variable and somewhat dependent on operating conditions and feed composition. The activated sludge characteristics were observed to affect filtration performance and in particular the capillary suction time (CST) was a possible indicator of efficiency, with a threshold value of 11 seconds above which filtration performance decreased. This parameter is proposed as an early warning tool for changes in the filtration performance of an SFD MBR, both for effluent quality and cleaning requirements.

中文翻译：

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自成型动态膜生物反应器 (SFD MBR) 作为适用于农业工业废水处理的技术

安装了两个配备 50 µm 尼龙网的台式自成型动态膜生物反应器 (SFD MBR)，并在有氧条件下运行，以处理罐头和酿酒厂废水。结果显示了两个系统的不同行为，证实了 SFD MBR 性能对生物质类型的强烈依赖，反过来，对被处理的流的类型也有很强的依赖性。两个工厂在出水质量方面都取得了良好的结果，证明了所提议技术的适用性。在用罐头废水和酿酒厂废水进料的反应器中，出水浊度的中值分别为 2.7 和 15.4 NTU（比浊法浊度单位）。有机物去除率（如 COD，化学需氧量）始终保持在 90% 以上，尽管悬浮固体的保留是可变的，并且在某种程度上取决于操作条件和进料组成。观察到活性污泥特性会影响过滤性能，特别是毛细管抽吸时间 (CST) 是效率的一个可能指标，超过 11 秒的阈值过滤性能会下降。该参数被提议作为 SFD MBR 过滤性能变化的早期预警工具，包括出水质量和清洁要求。