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.     

硅铁复合型絮凝剂的实验研究

研究了硅铁复合型絮凝剂的制备方法和絮凝性能，确定了其最佳反应条件，所得复合型絮凝剂对江水的除浊性能优于聚合硫酸铁（PFS）和聚合氯化铝（PAC）。     

复合絮凝剂制备研究进展

在介绍复合絮凝剂的分类和优势的基础上,综述了无机复合型絮凝剂、有机复合型絮凝剂和无机-有机复合型絮凝剂的制备方法,简要介绍了3类复合絮凝剂在水处理中的应用,并对今后复合絮凝剂的发展趋势以及研究方向作了展望。     

复合絮凝剂制备研究进展

在介绍复合絮凝剂的分类和优势的基础上,综述了无机复合型絮凝剂、有机复合型絮凝剂和无机-有机复合型絮凝剂的制备方法,简要介绍了3类复合絮凝剂在水处理中的应用,并对今后复合絮凝剂的发展趋势以及研究方向作了展望。     

复合型生物絮凝剂MFHJ4的制备及其对印染废水絮凝性能的研究

以制酒废水作为替代培养基对复合型絮凝剂产生菌HJ4菌株进行发酵培养,采用乙醇萃取法提取絮凝剂产品MFHJ4,并对其成分进行分析,考察了其对印染废水的絮凝性能.研究结果表明,每升制酒废水培养基可制得5.87g复合型生物絮凝剂MFHJ4粗制剂;该絮凝剂是一种含大量的--OH和-COO-基团,主要成分为多糖的阴离子型高分子絮凝剂;在絮凝剂投加量为12 mg·100 mL-1,1%CaCl2投加量为7mL·100 mL-1,pH为10的条件下,复合型生物絮凝剂MFHJ4对印染废水的浊度、色度及COD去除率分别为88.72%,91.80%和52.14%,该研究结果为生物絮凝剂的工业化生产及其在印染废水中的应用提供了理论依据.     

水处理絮凝剂的应用及研究进展

介绍了水处理絮凝剂的种类．叙述了无机絮凝剂、合成有机高分子絮凝剂、微生物絮凝剂以及复合型絮凝剂在水处理中的应用及研究现状,特别指出了复合型絮凝剂在水处理中的应用前景。认为从低分子到高分子、由无机到有机及由单一型到复合型是絮凝剂的发展走向,应追求高效、廉价、环保的絮凝剂。     

复合型微生物絮凝剂研究进展

复合型微生物絮凝剂因其高效的絮凝效果和安全无毒的特性得到广泛关注。综述了复合型生物絮凝剂的研究背景及其特点,着重介绍其研制与应用,包括菌种的筛选及生产条件优化、廉价底物制备、成分剖析、絮凝机理、复合型生物絮凝剂工程运用等内容。进一步指出现今复合型生物絮凝剂研究工作中存在的问题,对今后的研究发展进行了展望。     

我国复合型无机高分子絮凝剂的研究及应用进展

对无机高分子絮凝剂进行了分类,综述了聚合氯化铝铁、聚合硫酸铝铁、聚合硅酸铝铁等阳离子复合型絮凝剂,聚合硫酸氯化铝、聚合硅酸硫酸铝、聚合硅酸氯化铝、聚合磷酸氯化铝、聚合硫酸氯化铁、聚合硅酸硫酸铁、聚合磷酸硫酸铁等阴离子复合型絮凝剂.聚合硫酸氯化铝铁、聚硅酸硫酸铝铁、聚合磷硫酸铝铁等阴阳离子复合型絮凝剂的国内研究进展,指出复合型无机高分子絮凝剂由于其净水效果好而成为当前开发的重点和今后的发展方向.     

复合型微生物絮凝剂研究进展

复合型微生物絮凝剂因其高效的絮凝效果和安全无毒的特性得到广泛关注。综述了复合型生物絮凝剂的研究背景及其特点,着重介绍其研制与应用,包括菌种的筛选及生产条件优化、廉价底物制备、成分剖析、絮凝机理、复合型生物絮凝剂工程运用等内容。进一步指出现今复合型生物絮凝剂研究工作中存在的问题,对今后的研究发展进行了展望。     

羧甲基壳聚糖复合絮凝剂的制备及其应用研究

以羧甲基壳聚糖(CMC)和无机聚硅酸氯化铁(PFSC)为主要原料合成了一种新型絮凝剂CMC-PFSC,研究了其制备反应条件及反应机理.将其应用于海水淡化预处理,结果表明:这种复合型絮凝剂具有投加药量少、处理效果好、反应条件温和等特点,可显著降低海水的浊度、COD等污染指标,在水处理领域具有广阔的应用前景.     

ZW130混凝剂处理造纸废水

本文针对废纸造纸厂产生的废水，试用了不同混凝药剂的处理效果，并合成了一种处理造纸废水的专用混凝剂ZW130，该混凝剂与有机高分子絮凝剂配合使用，能达到比目前市场上常见的Al2(SO4)3、聚合氯化铝（ＰＡＣ）、聚合硫酸铁（ＰＦＳ）等混凝剂的处理效果好，药剂费用低。本文试验了该混凝剂的使用条件，并和其它几组混凝药剂处理效果做了对比实验。     

Optimum Coagulant from Acacia mearnsii de Wild for Wastewater Treatment

A novel coagulant agent from Acacia mearnsii de Wild tannin extract was characterized for removal of the anthraquinonic colorant Alizarin Violet 3R and the anionic surfactant sodium dodecylbenzene sulfonate. This coagulant is the result of a previous optimization study. The influence of operative variables such as temperature, coagulant dosage, initial pollutant content, and pH was investigated. The new coagulant demonstrates a high affinity for dye and surfactant and is efficient within a wide range of working conditions. While the temperature does not affect the coagulant ability, an acidic pH seems to increase the contaminant removal from aqueous solutions. Implementation in a pilot plant confirms the feasibility of this coagulant not only at lab scale, but also at higher level.     

逆絮凝法制备天然橡胶的研究

本研究使用逆絮凝法制备天然橡胶,分别选用酸凝固剂、无机盐凝固剂、无机盐复合凝固剂进行研究,并探讨了絮凝条件对天然橡胶性能的影响因素。结果表明：酸作为凝固剂时,硫酸的絮胶效果比醋酸、甲酸好,三者物理性能相差不大。无机盐作为凝固剂时,使用氯化钙絮胶效果良好,当氯化钙质量分数为2%时,得到的天然橡胶性能基本与参比样云标、烟片胶性能相当。无机盐复配作为凝固剂时,使用氯化钙/氯化钠凝固剂时絮胶效果良好,得到的天然橡胶性能优越于参比样云标、烟片性能。适当提高温度及搅拌速度,均有利于天然橡胶的絮凝。     

化学混凝法处理造纸废水的研究

研究了洛阳市龙翔造纸厂的生产废水进行混凝处理时所需要的最佳混凝剂。实验结果表明：PAC作为混凝剂,PAM作为助凝剂联合处理该废水时,能够取得较好的去浊率和CODCr去除率,并且相对其他几种混凝剂经济费用更少;PAC＋PAM作为最佳混凝剂时,PAC和PAM的投加量分别为133、16.6mg/L,充分混凝沉淀20min后,去浊率可达99.7%,CODCr去除率可达46.0%,取得了较好的去除效果。     

水性漆废水混凝剂及其应用

近年来水性漆在工业中的应用越来越广泛,特别是在汽车工业中已经广泛应用.传统的混凝剂和漆雾凝聚剂已经不能有效的处理含水性漆的废水.通过硫酸铝与季铵盐在60℃下反应生成聚电解质,并把该聚电解质与阳离子聚丙烯酰胺复配,制成混凝剂.通过对含有水性漆废水的混凝实验,确认混凝剂可用于处理含水性漆废水,也可作为漆雾凝聚剂,用来处理含...     

Decision model for coagulant dosage using genetic programming and multivariate statistical analysis for coagulation/flocculation at water treatment process

In this research, genetic programming and multivariate statistical analysis techniques have been applied for decision support on the coagulant dosage and the mixing ratio as two kinds of coagulants have been injected at the same time in the coagulating sedimentation process of water treatment. The coagulant dosage has typically been determined through the Jar-test, which requires a long experiment time in a field-water treatment plant. It is difficult to efficiently determine the coagulant dosage since water quality changes with time. As there are no human experts who have sufficient knowledge and experience in the field, coagulants may be injected with an improper mixing ratio, which causes poor performance in the coagulating sedimentation process. In this study, a model for the approximation of coagulant dosage has been developed using genetic programming (GP). The performance of this model was evaluated through validation. A guideline on the optimal mixing ratio between PACS (Poly Aluminum Chloride Silicate) and PAC (Poly Aluminum Chloride) has been provided through statistical analysis.     

Enhancement of media filter performance with coagulant use for treatment of diesel oil contaminated surface water

The objective of this study was to investigate the effect of coagulant addition on the filter performance and effluent quality during media filtration of surface water contaminated with diesel oil. A pilot scale multi-media filter system was operated under constant head conditions and at a constant loading rate of 30 L/min. The tests were conducted with and without coagulant addition prior to filtration of the surface water contaminated with diesel oil. Each filtration run was continued until the pressure drop increased to 0.7 bar. The source water with a turbidity of 10-15 NTU was prepared by mixing bentonite clay with tap water. The effect of coagulant addition on the performance of a multi-media filter for treatment of diesel oil contaminated source water was evaluated based on pressure change, filter run time before the filter clogged, and turbidity removal. The coagulant addition significantly improved the operational time of the media filter by reducing the rate of clogging. Both turbidity and PHC removal was achieved during the runs with coagulant addition.     

赤泥制备聚合氯化铝铁的实验研究

利用山东信发集团产生的赤泥,制备聚合氯化铝铁,取得了较为满意的效果。对从赤泥中提取聚合氯化铝铁的最佳条件进行了研究,包括液固比,温度,时间,pH值等。并对聚合氯化铝铁的絮凝性能及影响其絮凝效果的因素进行了分析。实验室研究表明,其具有优良的絮凝效果。     

新型稀土复合混凝剂在印染废水中的应用

新型稀土复合混凝剂PACRES是一种以聚合氯化铝为主要成分，并含有稀土、硫等元素的复合混凝剂。将它应用于印染废水处理，可改善处理效果，使废水的色度和CODCr达到较高的去除率，同时用量比PAC降低。     

Preparation and coagulation performance of hybrid coagulant polyacrylamide–polymeric aluminum ferric chloride

In this study, we synthesized a novel hybrid coagulant, polyacrylamide (PAM)–polymeric aluminum ferric chloride (PAFC), by the polymerization of acrylamide monomer with the redox system (NH₄)₂S₂O₈–NaHSO₃. The factors affecting the PAM–PAFC hybrid coagulant were investigated in an orthogonal experiment. The maximum intrinsic viscosity was observed at an initiator mass fraction of 0.5%, a polymerization temperature of 50 °C, a monomer mass fraction of 20%, and a polymerization time of 4 h, which were the optimum synthesis parameters. The spatial network structure of the PAM–PAFC hybrid coagulant was graphically determined by scanning electron microscopy. Hybrid PAM–PAFC was adopted to treat the kaolin–humic acid suspension and the synthetic dye wastewater. The effect of the coagulant dosage and pH on the coagulant experiments were examined. The coagulant experiment on the kaolin–humic acid suspension showed that the optimum treatment efficiency was achieved at a coagulants dosage of 0.6 mg/L, at which level the turbidity reductions with the inorganic PAFC coagulant, PAM–PAFC composite, and PAM–PAFC hybrid were 95.30%, 95.84%, and 98.38%, respectively. Treatment with the PAM–PAFC hybrid coagulant was also effective in removing Congo Red and Direct Fast Turquoise Blue GL; the color‐removal efficiencies for these dyes were higher than 93% and 94%, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46355.