Chemical Engineering Department, Universidad de La Frontera, Casilla 54-D, Temuco, Chile and Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, Casilla 54-D, Temuco, Chile E-mail:
NALCO Europe B.V., Ir. G. Tjalmaweg 1, Oegstgeest, The Netherlands.
Water Sci Technol. 2014;69(11):2237-42. doi: 10.2166/wst.2014.153.
Biomass retention, required for high rate anaerobic wastewater treatment, can be accomplished coupling an anaerobic bioreactor with membrane filtration. However, low flux seems to be a common factor when operating anaerobic membrane bioreactors (AnMBRs). Modification of biomass properties may represent a strategy for improving membrane flux. The addition of flocculants was tested as a tool for flux increase. Six different products were tested in dead-end filtration experiments. Based on the results, two products were selected for cross-flow tests. The one presenting better performance (Nalco MPE50) was tested in a laboratory-scale continuous AnMBR. Results show that the flocculant was able to substantially increase flux. Indeed, the flux-increasing effect was observed for several weeks after flocculant addition. Therefore, the use of flocculants seems to be an interesting tool to cope with temporary increases in required flux.
生物量保留对于高负荷厌氧废水处理是必需的，可以通过将厌氧生物反应器与膜过滤相结合来实现。然而，当操作厌氧膜生物反应器（AnMBR）时，低通量似乎是一个常见的问题。改变生物量特性可能是提高膜通量的一种策略。添加絮凝剂已被测试作为增加通量的工具。在死端过滤实验中测试了六种不同的产品。基于结果，选择了两种产品进行错流测试。性能更好的一种（纳尔科 MPE50）在实验室规模的连续 AnMBR 中进行了测试。结果表明，絮凝剂能够显著提高通量。事实上，在添加絮凝剂后几周内都观察到了通量增加的效果。因此，使用絮凝剂似乎是应对所需通量临时增加的一种有效手段。
