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通过全面分析电解铝生产废水来源、生产废水水质以及各类混凝剂的特性,优选三种混凝剂进行混凝试验,确定适用混凝剂的种类以及投加量,对电解铝生产废水处理工程具有广泛的应用价值。 相似文献
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活性染料印染废水的混凝脱色实验研究及应用 总被引:3,自引:0,他引:3
本文介绍通过选取有代表性的四种混凝剂对含活性染料的印染废水进行混凝脱色实验,确定适合活性染料废水的混凝剂、最佳混凝剂投药量及混凝反应控制条件以及在实际中的应用。 相似文献
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文章以硫酸铝、硫酸铁与聚二甲基二烯丙基氯化铵(PDM)为原料,制备PAFS-PDM复合混凝剂并表征其结构形态,同时考察了pH值、混凝剂投加量对油田钻井废水中COD的去除率以及溶液中Zeta电位的影响,为复合混凝剂的开发及使用提供一定的参考。研究结果表明:当PAFS-PDM复合混凝剂的投加量为8 000 mg/L、pH值为5时对塔里木油田钻井废水中COD的去除率达93.05%,此时溶液中Zeta电位较低。XRD衍射及SEM表征结果显示,制备的PAFS-PDM复合混凝剂中存在铝铁—羟基聚合物,微观形态下复合混凝剂将聚合形成的扇形片状结构再相互连接成发散立体结构,从而增大了比表面积,提高了混凝剂的吸附架桥能力,结合Zeta电位分析得出PAFS-PDM复合混凝剂为阳离子型混凝剂,而且具有较强的电中和能力。 相似文献
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选用价格便宜的无机高分子混凝剂聚合铁和一般常用的明矾、氯化铁以及硫酸亚铁进行制革废水脱硫探索,比较了这四种混凝剂对含硫废水的处理情况,并且进一步对pH值、投加量对策铁脱硫效率的影响进行试验研究。 相似文献
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污水脱磷的几种化学方法 总被引:5,自引:0,他引:5
用加入混凝剂的方法脱除污水中的磷,是最简单且最高效的方法。常使用能与磷酸盐结合而生成不溶性盐类的铁盐、铝盐、石灰等作为混凝剂。本文介绍了几种混凝方法的原理、影响因素等,并对投药位置、投药量着重进行了研究。 相似文献
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An investigation of dye decolorization from synthetic dye solutions using the non-ionic, water-soluble, high molecular weight seed gums Ipomoea dasysperma and guar gum as coagulants was undertaken. The use of galactomannans derived from plants in this system presents a sustainable method of textile effluent treatment. These natural coagulants extracted from plants proved to be workable alternatives to conventional coagulants like polyaluminum chloride, as they are biodegradable, safe to human health, are cost effective when compared to imported chemicals and have a wider effective dosage range for flocculation of various colloidal suspensions. Coagulant dose and coagulation pH are important factors influencing the mechanism of coagulation. Also the type and chemical structure of the dye plays an important role in the coagulation process. The seed gums alone were found to be effective for decolorization of direct dye and in combination with PAC their coagulation efficiency was well extended even for reactive and acid dyes. 相似文献
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The application of bioflocculant for the removal of humic acids from stabilized landfill leachates 总被引:24,自引:0,他引:24
The evaluation of bioflocculant, in comparison with traditional inorganic coagulants, for the removal of humic acids from landfill leachates stabilized by biological treatment, was performed using conventional jar-test coagulation experiments. The optimized conditions (pH and coagulant dosage) were identified for the treatment of synthetic solutions as well as for biologically pre-treated landfill leachates. It was found that the application of bioflocculant was quite efficient in the removal of humic acids from synthetic solutions as well as in the reduction of COD content from real landfill leachates. The optimal pH value was found to be between 7 and 7.5, while a 20 mg/l bioflocculant dosage was sufficient in providing more than 85% humic acid removal. The results were comparable with those obtained by the application of conventional coagulants such as alum or polyaluminum chloride; therefore, bioflocculant can be considered as a viable alternative in the treatment of landfill leachates applying coagulation. 相似文献
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混凝沉淀技术及其在纺织印染废水处理中的应用前景 总被引:2,自引:0,他引:2
本文对纺织印染污水处理中采用的几种混凝剂进行小结与评价,并开展一些技术讨论,从而确定了混凝沉淀技术在纺织工业污水处理中的应用前景。 相似文献
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无机复合高分子混凝剂具有效果好,稳定性高,原料来源广,价格低廉等特点,因而其研制和应用已成为热点和发展趋势。综述了近年来国内外发展现状,着重介绍了其主要性能及在水处理中的应用。 相似文献
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Treatment of Agro‐Based Industry Wastewater by the Electro‐Oxidation Method: Comparative Results From Iron and Aluminum Metal Plate 下载免费PDF全文
Omprakash Sahu 《环境质量管理》2016,25(4):85-106
Among the various technologies available to treat wastewater from sugar production, electro‐oxidation, or electrocoagulation, is considered one of the best. Moreover, it is a cost‐effective method. Although it is considered an advanced form of chemical coagulation, it does not require the addition of chemical coagulants, as the coagulant is generated through the dissolution of the sacrificial anodes that are connected to the electric current in the treatment chamber. This article examines how an electro‐oxidation system can be established and explores the variables that affect the process. 相似文献
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The application of potassium ferrate for sewage treatment 总被引:12,自引:0,他引:12
The comparative performance of potassium ferrate(VI), ferric sulphate and aluminium sulphate for the removal of turbidity, chemical oxygen demand (COD), colour (as Vis400-abs) and bacteria in sewage treatment was evaluated. For coagulation and disinfection of sewage, potassium ferrate(VI) can remove more organic contaminants, COD and bacteria in comparison with the other two coagulants for the same doses used. Also, potassium ferrate(VI) produces less sludge volume and removes more contaminants, which should make subsequent sludge treatment easier. 相似文献
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采用自制TiO2作为光催化剂,利用光催化-混凝联合处理含Cr(Ⅵ)废水,研究了废水的pH值、催化剂用量、反应时间、有机物和混凝剂种类对含Cr(Ⅵ)废水中Cr(Ⅵ)去除率的影响。结果表明,在添加EDTA,pH值为1,紫外灯120min左右,二氧化钛加入量为0.4g,采用FeCl3和PAM作为混凝剂时,Cr(Ⅵ)的去除效率最好。 相似文献