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首页> 外文会议>Biological treatment symposium 2013 >Ten Years' Experience in Biological Filtration for Pre-treatment in Reverse Osmosis　Membrane Applications
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Ten Years' Experience in Biological Filtration for Pre-treatment in Reverse Osmosis　Membrane Applications

机译：在反渗透膜应用中进行生物过滤的十年经验

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Membrane filters have gained widespread acceptance as a treatment technology for brackish groundwater. Often some form of pre-treatment is required, to reduce constituents in the water that contribute to membrane fouling related operational cost increases over time. Operating and maintenance costs of the pre-treatment technologies commonly used may be significant, particularly if the pre-treatment system uses purchased chemicals that also generate residuals needing disposal. Many small water treatment plants in the Province of Saskatchewan, Canada use groundwater as a source. This water typically has high concentration of hardness, TDS, iron, manganese, arsenic and often undesirable levels of other constituents including nitrogen based compounds. Over the past ten years, a number of small water treatment systems located on First Nations Communities throughout Saskatchewan, Canada have employed innovative biological filtration as a pre-treatment process for reverse osmosis (R.O.), and/or nanofiltration membranes. This system promotes effective and chemical-free pre-treatment using biological removal of iron, arsenic, phosphorous, ammonium, and other organic carbon from the raw water, prior to the water coming in contact with reverse osmosis or nanofiltration membranes. As these constituents can create particulate and organic fouling on membranes, their successful removal promotes longer membrane life, reduced anti-scalent and cleaning chemical usage, and lower feed pressure requirements. This in turn leads to lower operational costs. This paper will review seven water treatment plants installed throughout Saskatchewan such as the First Nation communities of Yellow Quill, Pasqua, Kahkewistahaw, White Cap Dakota (community plant and commercial plant), Kawacatoose, Muskeg Lake and Mosquito. This paper also provides background information on process piloting and development, project design and construction, and project capital costs. In addition this paper also summarizes plant performance metrics including water quality, bio-filter and membrane cleaning requirements and condition. The intent of the paper is to provide an overall "track record" demonstrating the success of this biological process, over the past ten years, as a proven application for pre-treating poor quality groundwater in small system membrane water treatment plants.
机译：膜过滤器已被广泛接受作为微咸地下水的处理技术。通常需要某种形式的预处理，以减少水中的成分，这些成分会随着时间的流逝而增加与膜结垢有关的运行成本。常用的预处理技术的运营和维护成本可能会很高，尤其是如果预处理系统使用购买的化学药品，这些化学药品也会产生需要处理的残留物。加拿大萨斯喀彻温省的许多小型水处理厂都使用地下水作为水源。该水通常具有高浓度的硬度，TDS，铁，锰，砷，并且常常具有不希望水平的其他成分，包括基于氮的化合物。在过去的十年中，位于加拿大萨斯喀彻温省第一原住民社区的许多小型水处理系统采用了创新的生物过滤技术作为反渗透（R.O.）和/或纳滤膜的预处理工艺。该系统可在水与反渗透或纳滤膜接触之前，通过生物去除原水中的铁，砷，磷，铵和其他有机碳来促进有效且无化学预处理。由于这些成分会在膜上产生颗粒和有机污垢，因此成功去除这些成分可延长膜寿命，减少防垢和清洁化学品的使用，并降低进料压力要求。这进而导致较低的运营成本。本文将回顾在萨斯喀彻温省各地安装的七个水处理厂，例如黄色鹅毛笔，帕斯夸，Kahkewistahaw，White Cap Dakota（社区植物和商业植物），Kawacatoose，Muskeg Lake和Mosquito的第一民族社区。本文还提供了有关过程中试和开发，项目设计和建设以及项目资本成本的背景信息。此外，本文还总结了工厂性能指标，包括水质，生物滤池和膜清洁要求和状况。本文的目的是提供一个总体的“记录”，以证明该生物方法在过去十年中的成功，作为在小型系统膜水处理厂中预处理劣质地下水的可靠应用。

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