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首页> 外文会议>2011 water quality technology conference amp; exposition: An Oasis of Ideas for a Changing Environment. >How to minimize disinfection by-products during the production of High Quality Recycled Water
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How to minimize disinfection by-products during the production of High Quality Recycled Water

机译：在生产高质量再生水期间如何最大程度减少消毒副产物

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Advanced Water Treatment Plants (AWTPs) produce high quality recycled water (HQRW) treating secondary treated wastewater by means of coagulation, microfiltration, reverse osmosis filtration, advanced oxidation and final disinfection with chlorine. Chloramines are used prior to the membrane filtration to keep biofouling on the surface of the reverse osmosis membranes manageable. When organic and inorganic substances in water react with disinfectants such as chloramines, disinfection by-products (DBPs), which can be of concern due to their potential adverse effects on human health, are formed. This paper investigates the formation of DBPs during HQRW production at two full scale AWTPs and at bench scale. Concentrations measured in the chloraminated reverse osmosis feed water during the sampling campaigns at full scale were generally low, with individual DBP concentrations not greater than 3 pig/L. However, haloacetonitriles (HANs) were measured at levels close to the Queensland (Australia) regulation for water recycling. During bench scale experiments, formation of all DBPs measured proved to increase with contact time except haloketones which showed a rapid initial formation in the first half an hour, followed by a much slower rate of formation. The rejection behaviour of different DBPs by reverse osmosis membranes at full scale varied depending on the DBP intrinsic properties. For example, bulky molecules were well rejected while polar compounds, such as the HANs, showed a poorer rejection. Besides size exclusion, so lute-membrane interactions play an important role in determining the extent of DBP removal.
机译：先进的水处理厂（AWTP）通过凝结，微滤，反渗透过滤，先进的氧化和最终用氯消毒来生产高质量的再生水（HQRW），用于处理二次处理的废水。在膜过滤之前使用氯胺以保持反渗透膜表面的生物结垢可控。当水中的有机和无机物质与消毒剂（如氯胺）反应时，会形成消毒副产物（DBP），由于其对人体健康的潜在不利影响而引起关注。本文研究了在两个完整规模的AWTP和基准规模的HQRW生产期间DBP的形成。在全面取样期间，在氯化反渗透补给水中测得的浓度通常较低，单个DBP浓度不超过3猪/升。但是，卤水乙腈（HANs）的含量接近昆士兰（澳大利亚）的水回收法规。在实验室规模的实验中，除卤酮在头半小时内显示出快速的初始形成，然后形成的速率慢得多之外，所有测得的DBP的形成均随接触时间而增加。反渗透膜对不同DBP的排斥行为在整个规模上都取决于DBP的固有特性。例如，大分子被良好地排斥，而极性化合物（例如HANs）显示出较差的排斥。除了尺寸排阻外，琵琶-膜相互作用在决定DBP去除程度方面也起着重要作用。

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