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三维荧光光谱技术能对水中的有机物进行有效识别和分析。结合有机物综合指标和三维荧光光谱技术,对珠三角地区某典型净水厂水处理工艺中的有机物的去除情况进行了考察分析。研究结果表明,东江水源受到轻微污染,原水中有机物成分以芳香蛋白类、溶解性微生物代谢物为主,腐殖酸类含量较低。传统处理工艺对东江原水中有机污染物的去除效果有限,臭氧-生物活性炭深度处理工艺对原水中有机污染物的去除起主要的作用,区域标准积分的去除率达到70%以上。三维荧光光谱分析能有效监测水中有机物的去除情况,为水厂的水质监测提供了一种有效的技术手段。 相似文献
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氧化法去除水中有机物的研究与应用现状 总被引:23,自引:1,他引:22
氧化法去除水中有机物的研究与应用现状魏宏斌严煦世(同济大学)1引言近几十年来,随着现代工业的迅猛发展和生活水平的提高,给水、废水中特别是饮用水中溶解性有机物的去除,已成为水处理的一项重要内容。而传统的水处理工艺已不能满足这一要求,许多新的水处理工艺应... 相似文献
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活性炭在微污染水源水处理中的应用综述 总被引:4,自引:0,他引:4
介绍了活性炭在微污染水源水处理中的应用情况,包括活性炭吸附、生物活性炭、臭氧活性炭技术等的对水源中有机物的去除效果和工艺特点,指出活性炭对去除水中微量有机物污染方面是其他水处理单元难以取代的,在微污染水源水处理中有较广泛的应用. 相似文献
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生物活性炭法处理污染原水的研究简介 总被引:1,自引:0,他引:1
给水水源日渐受到污染,现有水处理工艺已无法去除原水中的溶解性有机物,因而在加氯时会生成致癌的有机卤化物。要减少和防止在处理过程中产生三卤甲烷,就必须去除原水中的溶解性有机物。 我们针对上海黄浦江水源污染的现状,采 相似文献
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《中国给水排水》2021,(9)
采用常规处理/臭氧/生物活性炭、超滤/臭氧/生物活性炭与超滤/纳滤3种不同工艺处理太湖高藻原水,通过中试比较3种工艺对水体中污染物的去除效能,并从三维荧光光谱和有机物分子质量两方面研究了不同工艺对有机物的去除机理。结果表明,超滤/臭氧/生物活性炭组合工艺对浊度、UV_(254)、藻密度和叶绿素a的去除效果最好,平均去除率分别为99.96%、96.40%、99.39%和98.75%;超滤/纳滤组合工艺对COD_(Mn)的平均去除率最高,为92.73%;常规处理/臭氧/生物活性炭组合工艺对氨氮的平均去除率最高,为84.21%。在线混凝可有效控制膜污染,保证系统的长期稳定运行;3种工艺在污染物去除方面各有优势,但膜组合工艺的处理效果更稳定。 相似文献
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强化常规工艺处理黄河原水的试验研究 总被引:3,自引:0,他引:3
天津在冬季、经长距离调用的黄河原水水质具有低温、低浊、微污染的特点,采用常规工艺处理时出水CODMn很难满足《城市供水水质标准》(CJ/T206-2005)的要求,为此开展了强化常规工艺的试验研究。结果表明,通过采取臭氧预氧化或高锰酸盐复合药剂(PPC)预氧化、高效絮凝刺HPAC强化混凝气浮、改性滤料强化过滤等措施,可显著改善常规工艺的出水水质,对有机物的去除率提高了10%以上,出水CODMn〈3mg/L。臭氧(或PPC)预氧化、HPAC混凝气浮、改性滤料过滤是改善常规工艺出水水质的有效手段。 相似文献
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Ronan Treguer Annabelle Couvert Dominique Wolbert Annie Tazi-Pain 《Water research》2010,44(3):781-788
More stringent legislation on dissolved organic matter (DOM) urges the drinking water industry to improve in DOM removal, especially when applied to water with high dissolved organic carbon (DOC) contents and low turbidity. To improve conventional processes currently used in drinking water treatment plants (DWTPs), the performances of a hybrid membrane bioreactor containing fluidised activated carbon were investigated at the DWTP of Rennes. Preliminary results showed that the residual DOC was the major part of the non-biodegradable fraction. In order to increase the global efficiency, an upstream oxidation step was added to the process. Ozone was chosen to break large molecules and increase their biodegradability. The first step consisted of carrying out lab-scale experiments in order to optimise the necessary ozone dose by measuring the process yield, in terms of biodegradable dissolved organic carbon (BDOC). Secondly, activated carbon adsorption of the DOC present in ozonated water was quantified. The whole process was tested in a pilot unit under field conditions at the DWTP of Rennes (France). Lab-scale experiments confirmed that ozonation increases the BDOC fraction, reduces the aromaticity of the DOC and produces small size organic compounds. Adsorption tests led to the conclusion that activated carbon unexpectedly removes BDOC first. Finally, the pilot unit results revealed an additional BDOC removal (from 0.10 to 0.15 mg L−1) of dissolved organic carbon from the raw water considered. 相似文献
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Enhanced coagulation in a typical North-China water treatment plant 总被引:12,自引:0,他引:12
The characteristics of typical source waters in northern China and their enhanced coagulation features were studied in this paper. Through bench scale tests, a composite coagulant (HPAC) was selected for this kind of high alkalinity and pH water. It can be 30% more efficient in organic matter (OM) removal than the traditional coagulants (AlCl(3), FeCl(3)), and polyaluminum chloride (PACl), especially more efficient in removing high SUVA, hydrophobic and high molecular weight dissolved organic matter (DOM). It is found that some DOM with low SUVA has precedence over that with high SUVA to be removed at conventional dosages in some seasons, and that the priority of DOM removal is in the same sequence for all the coagulants. DOM with high SUVA is not always more easily removed. When applying HPAC as coagulant, flotation process can remove hydrophobic OM more efficiently than sedimentation process in pilot scale tests. 相似文献
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从分子质量的变化分析臭氧活性炭工艺 总被引:7,自引:3,他引:7
为了解臭氧活性炭工艺的机理并优化运行条件,采用臭氧活性炭处理黄浦江原水,分析了原水及经不同工艺单元处理后溶解性有机物 (DOM)分子质量 (MW)的变化。结果表明:黄浦江原水中的DOM主要为小分子有机物;臭氧对大分子有机物的氧化分解作用明显强于对小分子有机物的氧化作用;MW<1ku的有机物经臭氧氧化后则表现出不同程度的增加;混凝、沉淀、过滤对MW>3ku的大分子有机物去除效果较好,而对MW<3ku的小分子有机物去除效果较差;生物活性炭单元能有效去除MW为 3~1ku和MW<1ku的小分子有机物;臭氧氧化与活性炭吸附在去除不同MW有机物的过程中有很好的互补性,从而使该工艺能有效去除原水中的DOM。 相似文献
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采用中试装置,研究了常规处理工艺分别与活性炭工艺、超滤组合进行深度处理,结果表明:臭氧活性炭工艺对有机物的去除效果要好于超滤,出水CODMn、UV254、DOC等指标均优于超滤工艺;超滤工艺对浊度、颗粒物和微生物方面的去除效果要优于活性炭工艺,其原因在于不同的去除机理。 相似文献
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Adsorption of dissolved organic matter onto activated carbon--the influence of temperature, absorption wavelength, and molecular size 总被引:2,自引:0,他引:2
In this study, batch and column adsorption experiments with granular activated carbon (GAC) were carried out for removing dissolved organic matter (DOM) of a pond water at different water temperatures (5, 20, and 35 °C). The water was characterized before and after the adsorption step using UV/VIS spectroscopy and size-exclusion chromatography (SEC) combined with diode array detection (DAD). DOM breakthrough of GAC filters has been found to be slower at higher water temperatures, the DOM removal being most effective at 35 °C. UV/VIS spectra and SEC chromatograms of water samples treated at different water temperatures indicate that an increase in temperature especially supports the adsorption of small DOM molecules as well as molecules absorbing at higher wavelengths, specifying aromatic structures of DOM. SEC-DAD has been demonstrated to be an efficient method for characterizing DOM of natural waters and for detecting relative changes of DOM during the water treatment process. 相似文献
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以上海某水厂及其供水管网系统为研究对象,采用微生物学和物理化学分析方法研究了水厂常规净水工艺对主要指标的去除效果和管网水水质的生物稳定性及其变化规律.结果表明:与<地表水环境质量标准>中的水源地水质标准相比,水厂原水中硝酸盐氮、pH、总大肠菌群的合格率为100%,亚硝酸盐氮、氨氮的合格率仅有40%,总磷、DO、CODMn的合格率也较低,分别为0、40%、20%,在处理或供水过程中可能引起细菌的再生长;水厂的净水工艺对微生物和总磷的去除效果显著,对腐殖质等大分子有机物的去除效果也较好,但对DOC、BDOC的去除效果不明显;原水的SUVA值较小,不需进行强化混凝处理;BDOC和异养菌数沿管网上升,且异养茵数与浊度、BDOC、总磷呈正相关,与余氯呈负相关. 相似文献