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首页> 外文会议>Membrane technology conference exposition >Effect of Biological Activated Carbon Filters on the Removal of Biodegradable NOM, Molecular Weight Membrane Fouling
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Effect of Biological Activated Carbon Filters on the Removal of Biodegradable NOM, Molecular Weight Membrane Fouling

机译：生物活性炭过滤器对去除生物降解的Nom，分子量和膜污垢的影响

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Natural organic matter is a complex mixture of various organics including humic substances, carbohydrates, amino acids and carboxylic acids that exist in natural waters. Integrated treatment processes that combine oxidation processes (such as ozonation or UV/H2O2) and activated carbon biofilters have been shown to be very effective at reducing natural organic matter (NOM) levels by transforming a significant portion of NOM into biodegradable organic matter (BOM). Previous work has shown that changes in the structure of NOM can affect the fouling behaviour of membranes. Many pretreatment technologies are currently being developed to reduce the fouling rate during filtration and extend the operating lifetime of membranes. It has been hypothesized that decreasing the molecular weight of NOM can reduce the extent of fouling at the membrane surface, therefore the relationship between molecular weight distribution of oxidized NOM and fouling is of importance. The current research project investigated the effect of ozone and advanced oxidation at various doses on specific parameters including: biodegradability, formation of disinfection by-products, change in molecular weight and organic carbon content. The effect of different oxidations processes on the rate of biodegradation was investigated. Initially, biodegradation occurs quite rapidly in activated carbon biofilters. However, a residual amount of biodegradable organic matter (BOM) typically remains in the effluent of the bio filter. Of particular interest was the change in molecular weight throughout biodegradation within the activated carbon biofilters and the effect of different oxidation doses. Membrane filtration with raw water, oxidized water and biofiltered water was performed in order to determine the ability of integrated treatment processes to reduce fouling. This project provides insight into the benefits and shortcomings of oxidation processes, in terms of generating biodegradable organic matter, and the effects of these oxidation processes on the molecular weight of NOM. In addition, it provides insight into the suitability these integrated oxidation processes as pre-treatment options to reduce the rate of fouling in membrane filtration.
机译：天然有机物是各种有机物的复杂混合物，包括腐殖质物质，碳水化合物，氨基酸和在天然水中存在的羧酸。结合氧化方法（如臭氧或UV / H 2 O 2）和活性炭生物过滤器的综合处理方法已经证明通过将NOM中的NOM中转化为可生物降解的有机物质（BOM）来非常有效。以前的工作表明，NOM结构的变化可能会影响膜的污垢行为。目前正在开发许多预处理技术以减少过滤期间的污垢率，并延长膜的运行寿命。已经假设，降低NOM的分子量可以降低膜表面的污垢程度，因此氧化NOM和污垢的分子量分布之间的关系是重要的。目前的研究项目研究了臭氧和晚期氧化在各种剂量上的特定参数的影响，包括：生物降解性，形成消毒副产物，变化分子量和有机碳含量。研究了不同氧化方法对生物降解速率的影响。最初，在活性炭生物过滤器中，生物降解非常迅速地发生。然而，可生物降解的有机物质（BOM）的残留量通常保持在生物过滤器的流出物中。特别感兴趣的是在活性炭生物过滤器内的生物降解中的分子量的变化以及不同氧化剂量的效果。进行膜过滤，用原水，氧化水和生物过滤水进行，以确定综合治疗方法减少污垢的能力。该项目在发电可生物降解的有机物方面提供了融合过程的益处和缺点，以及这些氧化方法对NOM分子量的影响。此外，它还提供了对这些集成氧化方法作为预处理选择的洞察，以降低膜过滤中的污垢速率。

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