复合高分子絮凝剂在废水处理中的应用进展

概述了4类复合型高分子絮凝剂(无机复合高分子絮凝剂、有机复合高分子絮凝剂、无机-有机复合高分子絮凝剂和复合微生物絮凝剂)及其在废水处理中的应用进展,简单比较了各类复合型高分子絮凝剂的优缺点.认为今后复合型高分子絮凝剂研发领域的发展方向为:高效、广谱、环保、价廉絮凝剂的开发;作用机理研究;以废治废理念的拓展.     

无机高分子复合絮凝剂的研究进展及发展趋势

论文综述了无机高分子复合絮凝剂的研究进展。首先论述了无机高分子复合絮凝剂的特性和优势；然后对聚硅铝盐无机高分子复合絮凝剂，聚硅铁盐无机高分子复合絮凝剂，聚合铝铁无机高分子复合絮凝剂，其它无机高分子复合絮凝剂等的研究进展进行了综述和评论，内容包括制备、应用、絮凝作用机理等。最后，论文还对无机高分子复合絮凝剂的发展趋势进行了展望。     

复合高分子絮凝剂的制备及研究进展

复合高分子絮凝剂近年来发展迅速并成为研究的热点。对无机复合高分子絮凝剂、有机复合高分子絮凝剂和无机-有机复合高分子絮凝剂的国内外研究现状进行了概述,分析了复合高分子絮凝剂处理废水的优势及其发展面临的问题,指出无机-天然有机复合高分子絮凝剂将是未来研究的重点。     

复合高分子絮凝剂的研究进展

复合高分子絮凝剂是由两种或两种以上成分混合而成的、具有良好絮凝性能的高分子聚合物。本文主要对近几年国内外关于无机-无机复合高分子絮凝剂、无机-有机复合高分子絮凝剂、无机-天然高分子絮凝剂、无机-生物高分子絮凝剂的研究进行了综述,并对复合高分子絮凝剂今后的发展进行了展望。     

复合高分子絮凝剂的研究与应用进展

复合高分子絮凝剂既克服了单一絮凝剂吸附效果差、不易降解等缺点,又实现了不同成分在性能上的互补,在水处理领域发挥着越来越重要的作用。本文对复合高分子絮凝剂进行了分类概述,综述了无机-无机复合高分子絮凝剂、无机-有机复合高分子絮凝剂、微生物复合絮凝剂等复合高分子絮凝剂的研究进展,并对未来复合高分子絮凝剂的发展趋势进行了展望。     

中国高分子絮凝剂的研究现状与展望

介绍了无机高分子絮凝剂、有机高分子絮凝剂、微生物絮凝剂、天然高分子絮凝剂和复合高分子絮凝剂的特征及其絮凝机理.认为微生物絮凝剂和天然的高分子絮凝剂是未来高分子絮凝剂的发展方向,同时对我国高分子絮凝剂的市场前景进行了展望.     

聚硅酸盐类絮凝剂的制备及研究进展

无机高分子复合絮凝剂与普通的无机高分子絮凝剂相比有很多优点,近年来受到过内外学者的广泛重视并得到开发应用,聚硅酸盐类絮凝剂的开发成了研究热点。通过对几种高分子聚硅酸盐絮凝剂的介绍,分析了它们的制备方法、特点、发展现状及应用。     

高分子复合铁盐絮凝剂的研究进展

无机高分子复合絮凝剂与普通的无机高分子絮凝剂相比有很多优点，近年来得到国内外学者的广泛重视和开发应用，由于铝系絮凝剂存在的一系列问题，铁系絮凝剂的开发成为了研究热点，通过对几种高分子复合铁盐絮凝剂的介绍，分析了它们的特点。发展现状及应用，指出今后将有广阔的发展前景。     

无机-有机高分子复合絮凝剂研究与应用

综述了两大类无机一有机高分子复合絮凝剂——无机一合成有机高分子复合絮凝剂和无机一天然高分子复合絮凝剂的发展及其在废水处理中的应用,同时对它们的作用机理进行了概括和归纳,最后对当前无机一有机高分子复合絮凝剂存在的问题及发展方向提出了几点见解。     

油田污水处理絮凝剂的研究及发展

概述了油田污水处理过程中所用絮凝剂的分类,对国内外各类絮凝剂：无机高分子絮凝剂（阴离子、阳离子和无机复合絮凝剂）,有机絮凝剂（合成高分子絮凝剂,改性天然高分子絮凝剂和微生物絮凝剂）和复合絮凝剂的研制与开发动态以及取得的较为重要进展进行了综述,对油田污水处理絮凝剂的发展趋势和研究方向做了展望。     

铁系复合高分子絮凝剂在废水处理中的研究

复合高分子絮凝剂是近年来人们关注的新型、高效水和废水处理药剂.本文就近年来国内外铁系复合高分子絮凝剂的研究进展进行了综述,分析了其存在的主要特点,提出了今后研究工作的建议.     

固废基无机高分子混凝剂研究进展及改进途径

无机高分子复合型混凝剂具有优越的絮凝能力,但目前于基于固废资源化利用制备无机高分子复合混凝剂的相关研究缺乏系统性。本文介绍了三类固废基无机高分子复合混凝剂的制备工艺、性质特点,简述了其在水处理领域的应用、作用机理及存在的问题,并结合新型无机高分子复合混凝剂的研究进展,分析了固废基无机高分子复合混凝剂的发展方向。根据已有结果,文中指出需要从固废原料的化学组成,建立全面的固废资源,优化不同来源固废基无机高分子复合混凝剂的制备工艺;其次指出应进行混凝剂的物耗、能耗等技术经济分析,促进其规模化生产使用;并提出对污泥固废应进行循环资源化利用,关注制备过程中产生的无机盐,避免对水质的不良影响;最后表明,应加强混凝剂功能化研究,开发具有协同效应的固废基无机高分子复合混凝剂。     

我国无机高分子混凝剂在含油废水处理中的应用

介绍了含油废水的处理特点及无机高分子混凝剂的发展现状 ,着重综述了我国在处理含油废水过程中采用的各种无机高分子混凝剂的性质、制备方法及处理效果     

PDM复合混凝剂用于低温低浊水源水处理的研究——低浊度宁波姚江水处理

该文报道了用特征黏度系列化的有机阳离子高分子聚二甲基二烯丙基氯化铵(PDM)与无机混凝剂复合物对宁波低浊度姚江水的脱浊处理研究过程。通过混凝烧杯实验,考察了无机混凝剂的种类及其与PDM的复合配比对低浊度姚江水脱浊效果的影响。结果表明,对低浊度姚江水,要达到1.0~1.2 NTU的沉淀出水余浊,硫酸铝(AS)需5 mg/L左右的投加量,聚合硫酸铁(PFS)需8 mg/L左右的投加量,而聚合氯化铝(PAC)的投加量在10 mg/L左右;PDM对无机混凝剂强化混凝脱浊效果明显,无机混凝剂与PDM的复合配比越低,复合混凝剂混凝脱浊效果越好,在达到水厂沉淀出水浊度标准的前提下,AS/PDM复合药剂能比单独使用AS减少20%AS投加量;PFS/PDM复合药剂能比单独使用PFS减少30%~40%PFS投加量;PAC/PDM复合药剂能比单独使用PAC减少30%~50%PAC投加量。     

增效澄清海水预处理净化工艺研究

以接触絮凝理论为依据,将机械搅拌、斜管沉淀和污泥回流3种工艺有机结合用于海水预处理的增效澄清工艺。在进水量为300 L/h的条件下进行中试,优选快速搅拌G值、慢速搅拌G值和污泥回流比等工艺参数,评价无机絮凝剂及其与有机高分子助凝剂配合使用的除浊效果。结果表明,当快速搅拌G值为600 s-1,慢速G值为60 s-1、污泥回流比为2%时,选择三氯化铁与聚丙烯酰胺阳离子助凝剂配合使用,可使出水浊度降至(1.2±0.5)NTU,从而达到海水高效预处理的目的。     

Effect of coagulant types on textile wastewater reclamation in a combined coagulation/ultrafiltration system

A combination of coagulation and ultrafiltration (UF) processes for textile wastewater reclamation was investigated using various types of coagulating chemicals such as polyamine, alum, polyaluminum chloride (PACl), and ferric salts. The potential of the combined system was evaluated to replace the existing treatment processes which are composed of a flotation tank (primary step) and a series of filtration beds including sands, granular carbons, and diatomaceous powders. Regardless of the type and dosage of the coagulants, the UF system achieved substantial colloidal particle removal (>97% of turbidity was removed), but membrane fouling was mitigated in a different manner. The degree of fouling reduction was highly dependent upon the type of coagulants used, even though the turbidity and organics removal efficiencies were nearly the same. The polymeric coagulant aggravated membrane fouling, whereas the inorganic coagulants always helped reduce fouling. A residue of the coagulating polymer, which was added in the primary step and its concentration in the effluent was at an immeasurable level, was found to cause serious membrane fouling. The use of polymeric coagulants should be prevented or minimized if UF is considered for textile wastewater reclamation. Polymerized aluminum was found to be the most effective among the coagulants tested, although ferric salt was better than alum in controlling fouling. In particular, it seemed that the characteristics of coagulation chemistry and the coagulated particles had a great impact upon membrane fouling.     

金属聚硅酸复合混凝剂去除水中污染物的研究

用烧杯搅拌实验考察了金属聚硅酸复合混凝剂(MPS)去除水中污染物质的性能。实验结果表明：与其他常见的混凝剂相比,MPS对水中的污染物质如腐殖质、硝酸盐氮、亚硝酸盐氮等均有较好的去除效果,是一种新型多功能无机高分子混凝剂。     

硫化印染染料生产废水处理的初探

采用自行制备的具有Al/Si（1.5）和Fe/Si（2.0）的两类新型无机高分子混凝剂聚硅酸氯化铝（PSAFC）和聚硅酸硫酸铁（PSAFS）,对硫化印染生产废水进行处理,考察了混凝剂投量对混凝效果的影响。实验结果表明：氯化物型（PSAFC）和硫酸盐型（PSAFS）混凝剂对印染废水的色度、浊度、CODCr均有良好的去除效果,且PSAFS的混凝效果略优于PSAFC。     

Interaction mechanism of flocculants with coal waste slurry

Coal tailings are the inevitable by-product of coal mining and preparation plants, and often are problematic in terms of dewatering and solid-liquid separation. The interaction of multi-component fine coal tailings with various coagulants and flocculants are important in dewatering processes. Tunçbilek coal preparation plant wastes are composed of 81% inorganic solids with negative surface charges dominating at all pHs. The highest settling rate and turbidity values without flocculant are obtained at natural pH of 8.3 due to the presence of inorganic ions in the suspension particularly Mg²⁺and Ca²⁺that act as natural coagulants. Additon of medium and low charge density anionic flocculants with high molecular weight at natural pH produced higher settling rates at lower dosages than nonionic and cationic flocculants. It shown that the charge density of anionic flocculants has a significant effect on both settling rate and supernatant turbidity, also the settling rate increases with increasing the degree of anionicity. Anionic flocculants having high molecular weight and high anione charge density produced flocs at sufficient size necessary for settling conditions, yet anionic flocculants having low charge density were more effective in the clarification of suspensions containing clay minerals of high stability. The multivalent ions act as a bridge between negatively charged coal, quartz and clay minerals with anionic groups (-CH₂-(CH-CO)-COO groups) of the polymer. Non-ionic flocculants required higher dosages than other flocculants to achieve equivalent settling rates; though excellent turbidity values were obtained in most common pH values. Cationic flocculants of higher charge densities (%70) achieved good settling rates and low supernatant turbidities (9.9 NTU) at natural pH for a dosage of 119.7 g/t-solids flocculant. An interaction mechanism of each polymer type with different components of the tailings is proposed.     

新型复配混凝剂处理三次采油废水的实验研究

从已有的混凝剂中筛选出几种适合处理三次采油废水的无机和有机高分子混凝剂,通过复配提高三次采油废水中部分水解聚丙烯酰胺(HPAM)的去除率,由实验得出了最佳复配pH,在最佳pH和最佳搅拌条件下进行实验,发现聚合双酸铝铁(PAFCS)和阳离子型聚丙烯酰胺[P(DMDAAC/AM)]复配能得到最好的效果,HPAM的去除率达到92.6%.另外,在实验中通过添加氧化剂进行了氧化预处理实验,并进行了加砂强化混凝实验.