共查询到19条相似文献,搜索用时 125 毫秒
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含油废水处理技术的研究进展 总被引:2,自引:0,他引:2
评述了含油废水的处理方法,指出了各种方法的优势及目前存在的问题。介绍了含油废水处理的最新研究成果,提出了今后含油废水处理技术的一些建议与展望。并强调在含油废水处理技术的研究开发中,要加强含油废水处理的基础性研究,明确含油废水中各组分的相互关系,同时要减少污染源的排放,重视含油废水的回用 相似文献
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改性粉煤灰处理含油废水的研究 总被引:13,自引:0,他引:13
用改性粉煤灰处理含油废水 ,使之达到排放标准。主要讨论粉煤灰的废水处理机制及改性方法。用改性粉煤灰处理高低浓度含油废水 ,均获得满意的效果。同时 ,陈述了含油废水及粉煤灰的现状 相似文献
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改性粉煤灰处理含油废水的应用研究 总被引:13,自引:0,他引:13
用改性粉煤灰处理含油废水,使之达到排放标准。主要讨论粉煤灰的废水处理骸改性方法。并用改性粉煤灰处理高低浓度含油废水,均获得了满意的效果。同时,陈述了含油废水及粉煤灰的现状。 相似文献
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含油废水及其处理技术的研究进展 总被引:6,自引:0,他引:6
概述了油类物质在水中的存在形式及特征,分析了气浮法、絮凝法、膜分离法、生物法等处理含油废水的方法及其相应的特点,同时并介绍了最新的发展状况,提出了对含油废水处理的建议与展望。 相似文献
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含油污水处理方法研究 总被引:2,自引:0,他引:2
综述了含油污水的来源及危害,较系统地介绍了盐析法、絮凝法、气浮法、粗粒化法、膜分离法、吸附法和生物法等处理含油污水的方法。最后介绍了微波法这种新型的含油污水处理方法。 相似文献
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《分离科学与技术》2012,47(16):3407-3418
Abstract A new method of emulsified oil separation for oily wastewater incorporating simple operation and shortened treatment time is necessary for improved wastewater treatment in some manufacturing plants. In the present study, the removal of emulsified oil from water by coagulation and foam separation using poly aluminum chloride (PAC) and milk casein was examined. By adding casein before the foam separation process, the oil removal was dramatically improved. By using surfactant (LAS) as a frother, the dosage of casein was drastically reduced. Furthermore, for processing actual oily water, LAS was unnecessary because a sufficient amount of surfactants for foaming was included in the wastewater. For treatment of the actual oily wastewater collected from a steel manufacturing plant, the optimum condition for PAC and casein was 30 mg‐Al/L and 10 mg/L, respectively, and the oil concentration decreased from 170 mg/L to 2.2 mg/L. After examining several types of oily wastewater, 96–99% of oil removal efficiency was obtained by adjusting the dosages of PAC and casein. Coagulation and foam separation using casein has shown a high potential as an alternative method to dissolved air flotation (DAF) for processing emulsified oil water. 相似文献
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水力旋流器是利用离心力场进行两相流体分离的设备,具有体积小、效率高、结构简单和安装便捷等特点,广泛应用于化工、石油及地下开采等工业领域。本工作主要介绍了旋流器的工作原理、理论研究和应用现状,从数值模拟、旋流器的结构参数、操作参数和物性参数及应用技术拓展等方面综述了水力旋流器的研究现状,并针对煤化工废水水质高乳化、高分散和高粘度等特点,综合分析了水力旋流器在煤化工废水预处理中的应用前景。旋流器模拟与实验相结合为目前研究的主要方向,深度分析了旋流器内两相流的运动状态,为旋流器结构改良提供理论依据,推动旋流器快速发展。旋流器结构改良设计和操作参数的优化均有一定局限性,油水物性是影响油水分离的决定性因素。因此,前期对含油废水进行预处理极为重要,可采用破乳剂或絮凝剂、超声或微波等方法改善含油废水的物性,对含油废水物性的研究和改善并结合数值模拟的应用将是未来提高水力旋流器分离效率的发展方向,旋流器在煤化工废水除油脱焦粉工艺中有很好的经济效益和广阔的应用前景。 相似文献
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石油开采过程中会产生大量的油水混合物,每天生产生活中也会产生大量含油废水,如何处理这些油水混合物,是环境保护和可持续发展的重大需求。针对含油量较高的油水混合物,本工作制备了疏水-超亲油分离膜。以机械性能较好的泡沫镍为过滤基体,采用电沉积方法,在泡沫镍表面沉积铜颗粒,构筑亲油疏水表面。研究了沉积电位和沉积时间对表面结构的影响,并测试了分离膜表面结构、表面粗糙度及水滴在膜表面的接触角,并对所制备的分离膜进行油水分离性能测试和多次循环的稳定性测试。结果表明,所制备的分离膜具有良好的循环分离性能,对于油水混合物循环十次后分离效率仍在90%以上。本研究为高效油水分离膜材料开发提供了新思路,并拓展了电化学表面改性的应用领域。 相似文献
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《分离科学与技术》2012,47(8):1170-1177
The cyclonic-static microbubble flotation column (FCSMC) has dual effects including the cyclonic separation and airflotation separation with advantages in the oily wastewater treatment field such as the small lower limit of the effective separation size, short separation time, large handling capacity, and low operating cost, especially the polymer-flooding oily wastewater treatment aspect. In this paper, the cyclonic separation function mechanism of the FCSMC was investigated. In addition, several operating parameters which impact oil removal efficiency and kinetics constants such as circulating pressure, the superficial gas velocity and the frother consumption were also investigated. The mathematical model relationship between the separation kinetics constants and the factors including circulating pressure, gas superficial velocity, and the average bubble diameter was established. Based on the strength by steps, the physical separation model of the cyclonic-static microbubble was also established. 相似文献
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Oil/water separation is a topic of interest worldwide because of increasing release of industrial oily wastewater and frequent leakage of crude oil. Superhydrophilic and underwater superoleophobic meshes were fabricated by simple and fast dip-coating of nanosized TiO2 on a stainless steel mesh with a 50 μm pore size. The coated mesh was used for oil/water separation by gravity-driven filtration without additional energy. After acid treatment and TiO2 coating of the mesh, its surface property was altered from hydrophobic to superhydrophilic and superoleophobic. Oil/water separation was achieved in 3 s with an efficiency of 98–99%, irrespective of oily water type (seawater or wastewater). Initial separation efficiency was maintained during a test involving 20 recycles. Therefore, the as-made TiO2-coated mesh can be used in practical applications such as for wastewater purification, and in the petroleum industry. 相似文献