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首页> 外文会议>Membrane technology 2008 >A SUSTAINABLE PATH TO MEMBRANE QUALITY EFFLUENT
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A SUSTAINABLE PATH TO MEMBRANE QUALITY EFFLUENT

机译：通往膜质高效产品的可持续之路

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The current trend when combining biological and membrane processes is to challenge thernmembrane with as high a fouling environment as possible, which results in very costly operatingrnprocedures that are required to mitigate membrane fouling. This has resulted in currentrnmembrane / biological designs (MBR) which require various combinations of high membranernarea, high energy consumption, excessive pre-screening and large equalization basins.rnIncreasing economic, environmental and political concerns will not sustain the high energy andrnmembrane costs and associated CO2 emissions of the MBR process scheme. To date, arnmembrane & biological process approach which has fundamental dual goals of minimizing bothrnmembrane area and energy consumption has not only presumably contained mutually exclusiverngoals, it has in large part been unexplored as an option.rnA highly efficient membrane / biological process, IMAS (Integrated Membrane ActivatedrnSludge), has been developed to dramatically lower the membrane fouling rate without additionalrnenergy input or an increase in the amount of membrane area. In fact, both energy usage andrnmembrane area are significantly reduced compared to a conventional MBR. A research study atrnDuke University has been initiated to compare IMAS, which uses suspended growth biomass, tornIMFAS (Integrated Membrane Fixed Film Activated Sludge), a biological / membrane processrnwhich combines both suspended & fixed growth biomass in the activated sludge process. ThernIMFAS process is expected to increase the efficiency of the combined activated sludge andrnmembrane process by further reducing both the hydraulic retention time of the biologicalrncomponent and the solids settling time of the high rate primary liquid/solids separationrncomponent.rnBoth IMAS and IMFAS create a low membrane fouling environment via particle management,rnprimarily controlling the composition and size of suspended particles. This enables thernmembrane to tolerate a wide range of suspended solids concentrations, with the concentrationrnrange being between that of a conventional MBR and a conventional activated sludge process.rnThe low fouling nature of the suspended particles allows the transmembrane pressure drop tornremain consistently low, even when challenged with high peak flow periods and varying influentrnturbidities. The design and operation of these technologies creates a complimentary synergyrnbetween the biological and membrane processes, allowing for the highest total system efficiencyrnto be achieved, while maintaining a compact footprint and generating minimum waste sludge.
机译：当将生物过程和膜过程结合起来时，当前的趋势是在尽可能高的结垢环境下挑战膜，这导致减轻膜结垢所需的非常昂贵的操作过程。这导致当前的膜/生物设计（MBR）需要多种组合，包括高膜尿素，高能耗，过多的预筛选和大型均化池.rn日益增加的经济，环境和政治担忧将无法维持高能量和膜成本以及相关的CO2 MBR工艺方案的排放量。迄今为止，具有最小化膜面积和能耗的根本双重目标的膜和生物过程方法不仅可能包含相互排斥的目标，而且在很大程度上还没有被选为一种方法。高效的膜/生物过程IMAS（集成已开发出膜活性污泥，可显着降低膜的结垢率，而无需额外的能量输入或膜面积增加。实际上，与传统的MBR相比，能源使用量和膜面积均显着降低。已开始在杜克大学进行一项研究，以比较IMAS和IMAS，IMAS使用了悬浮生长的生物质，tornIMFAS（集成膜固定膜活性污泥）是一种生物/膜工艺，将悬浮和固定生长的生物质结合在活性污泥工艺中。通过进一步减少生物组分的水力停留时间和高速率一次液/固分离的固体沉降时间，IMFAS工艺有望提高活性污泥和膜联合工艺的效率。IMAS和IMFAS两者均会降低膜污染通过粒子管理来控制环境，主要控制悬浮粒子的组成和大小。这使膜能够耐受各种悬浮固体浓度，其浓度范围介于常规MBR和常规活性污泥工艺之间。悬浮颗粒的低结垢性质使跨膜压降始终保持较低，即使在受到挑战时也是如此。高峰期流量大，进水浊度变化大。这些技术的设计和操作在生物过程和膜过程之间建立了互补的协同作用，从而实现了最高的总系统效率，同时保持了紧凑的占地面积并产生了最少的废物污泥。

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