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BASIC MEMBRANESAN OPERATORS AND OWNERS INTRODUCTIONTO MEMBRANE BIOREACTORS,SIZING CRITERIA, SURROUNDING SYSTEMSAND EXPECTED TRENDS IN THE INDUSTRY

机译:膜生物反应器,尺寸判据,环绕系统和行业预期趋势的基本膜操作者和所有者介绍

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While designing membrane bioreactor facilities over the past four years, I have listened to manyrnpresentations and toured numerous facilities. The presentations have focused on the membranesrnand its performance ability. The tours and design experience has given me the opportunity to seernthat the membrane process is more than just membranes. Critical to the membrane design is thernsite specific conditions and the numerous support systems that compliment and surround thernmembrane units.rnDifferent from the many papers and presentations that I have seen or heard, this paper providesrnthe operator an introduction to membranes, critical site specific sizing criteria, and the manyrnsystems that compliment the performance of membranes and surround the actual membranernunits. The paper has been prepared in the perspective of the Operator and Owner by breakingrnout each support system and its function. Operators, Owners, Engineers and the Manufacturersrnneed to be more attentive to the surrounding systems of each design as membrane plants becomernlarger and the application more varied. This paper provides an Operator and Owner a basicrnunderstanding of membranes, systems surrounding the membranes and the aspects of arnmembrane design.rnInitially, various membrane classifications and applications will be defined. From this point thernfocus will move toward Membrane Bioreactors. The reader is introduced to typical membranernprocess configurations and variations with respect to conventional activated sludge processes.rnBasic terminology is provided as well as the mechanics of flat plate and hollow fiber membranes.rnAfter providing the reader with a basic understanding of membranes, the membrane activatedrnsludge process is placed in the overall plant. Preliminary treatment is discussed with the variousrntypes of equipment available for screening and grit removal. The importance of preliminaryrntreatment before a membrane bioreactor and the critical design parameters of the equipment arernreinforced. The next process, the membrane bioreactor is examined based on critical sizingrncriteria. Differences are discussed between NPDES permit sizing criteria, membrane activatedrnsludge process sizing criteria and possible hydraulic configurations. Types of post treatmentrnfacilities are then presented. The membrane bioreactor impacts on the sludge process and sludgernproduction completes the plant overview.rnThe paper focuses next on the systems that surround and support the two leading membranernmanufacturers, GE – Zenon and Enviroquip, a Division of Eimco Water Technologies. Thisrncomparison identifies the similarities and differences between the two types of membranernprocesses, since each are a different type of membrane, hollow fiber and flat plate respectively.rnSurrounding support systems include:rn1. the return activated sludge systems,rn2. aeration blower system,rn3. membrane blower system,rn4. membrane units,rn5. permeate system,rn6. maintenance system,rn7. chemical systems, andrn8. performance monitoring systemsrnWhen appropriate, illustrations or schematics are provided of each support system with arnsummary of components, function and purpose.rnThe paper is concluded with a general comparison between the membrane support systems, arngeneral philosophy of each membrane manufacturer’s approach to the process technology, arnglobal design approach to assist the Operator and Owner during design and what is possibly onrnthe horizon from the manufacturers.
机译:在过去四年中设计膜生物反应器设施时,我听了很多演讲,参观了许多设施。演讲集中在膜及其性能上。巡回演出和设计经验使我有机会看到膜过程不仅仅是膜。膜的设计至关重要的是特定的工况和补充并围绕着膜单元的众多支撑系统。与我见过或听到的许多论文和演讲不同,本文为操作员提供了膜的介绍,关键的特定工位标准,以及许多补充膜性能并包围实际膜单元的系统。通过突破每个支持系统及其功能,从操作者和所有者的角度准备了本文。随着膜工​​厂越来越大,应用越来越多样化,操作员,所有者,工程师和制造商需要更加关注每种设计的周围系统。本文为操作者和所有者提供了有关膜,膜周围系统以及膜设计方面的基本知识。首先,将定义各种膜的分类和应用。从这一点上,焦点将转向膜生物反应器。向读者介绍了常规活性污泥工艺的典型膜工艺配置和变化.rn提供了基本术语以及平板和中空纤维膜的力学原理.rn向读者提供了对膜的基本了解之后,膜活性污泥工艺被放置在整个工厂中。初步的治疗方法是使用各种类型的筛分和除砂设备进行讨论。在膜生物反应器之前进行初步处理的重要性和设备的关键设计参数得到了加强。下一步,基于临界尺寸标准检查膜生物反应器。讨论了NPDES许可尺寸标准,膜活化污泥工艺尺寸标准和可能的水力配置之间的差异。然后介绍了后期处理设施的类型。膜生物反应器对污泥过程的影响和污泥的产生使工厂概述。rn接下来,本文重点介绍围绕并支持两个主要膜制造商GE – Zenon和Eimco Water Technologies部门Enviroquip的系统。这种比较可以识别两种类型的膜工艺之间的异同,因为它们分别是不同类型的膜,中空纤维和平板。环绕支撑系统包括:rn1。回流活性污泥系统,rn2。曝气鼓风机系统,rn3。薄膜鼓风机系统,rn4。膜单元,rn5。渗透系统,rn6。维护系统,rn7。化学系统,以及8。性能监测系统适当时,提供每个支撑系统的图示或示意图,并附带组件,功能和用途的摘要。rn本文对膜支撑系统之间的一般比较,每个膜制造商采用的生产工艺方法的一般原理进行了总结。在设计过程中协助操作者和所有者的设计方法,以及制造商可能提出的建议。

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